US1747664A - Apparatus for automatically training guns, etc., on moving objects - Google Patents

Apparatus for automatically training guns, etc., on moving objects Download PDF

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US1747664A
US1747664A US341552A US34155229A US1747664A US 1747664 A US1747664 A US 1747664A US 341552 A US341552 A US 341552A US 34155229 A US34155229 A US 34155229A US 1747664 A US1747664 A US 1747664A
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gun
image
motor
screen
strips
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Droitcour Howard Andrew
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    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01J—ELECTRIC DISCHARGE TUBES OR DISCHARGE LAMPS
    • H01J61/00—Gas-discharge or vapour-discharge lamps
    • H01J61/95—Lamps with control electrode for varying intensity or wavelength of the light, e.g. for producing modulated light
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F21—LIGHTING
    • F21V—FUNCTIONAL FEATURES OR DETAILS OF LIGHTING DEVICES OR SYSTEMS THEREOF; STRUCTURAL COMBINATIONS OF LIGHTING DEVICES WITH OTHER ARTICLES, NOT OTHERWISE PROVIDED FOR
    • F21V14/00—Controlling the distribution of the light emitted by adjustment of elements
    • F21V14/04—Controlling the distribution of the light emitted by adjustment of elements by movement of reflectors
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F41—WEAPONS
    • F41G—WEAPON SIGHTS; AIMING
    • F41G5/00—Elevating or traversing control systems for guns
    • G—PHYSICS
    • G02—OPTICS
    • G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
    • G02B23/00—Telescopes, e.g. binoculars; Periscopes; Instruments for viewing the inside of hollow bodies; Viewfinders; Optical aiming or sighting devices
    • G—PHYSICS
    • G09—EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
    • G09B—EDUCATIONAL OR DEMONSTRATION APPLIANCES; APPLIANCES FOR TEACHING, OR COMMUNICATING WITH, THE BLIND, DEAF OR MUTE; MODELS; PLANETARIA; GLOBES; MAPS; DIAGRAMS
    • G09B9/00—Simulators for teaching or training purposes
    • G09B9/02—Simulators for teaching or training purposes for teaching control of vehicles or other craft
    • G09B9/08—Simulators for teaching or training purposes for teaching control of vehicles or other craft for teaching control of aircraft, e.g. Link trainer
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01L—SEMICONDUCTOR DEVICES NOT COVERED BY CLASS H10
    • H01L31/00—Semiconductor devices sensitive to infrared radiation, light, electromagnetic radiation of shorter wavelength or corpuscular radiation and specially adapted either for the conversion of the energy of such radiation into electrical energy or for the control of electrical energy by such radiation; Processes or apparatus specially adapted for the manufacture or treatment thereof or of parts thereof; Details thereof
    • H01L31/08—Semiconductor devices sensitive to infrared radiation, light, electromagnetic radiation of shorter wavelength or corpuscular radiation and specially adapted either for the conversion of the energy of such radiation into electrical energy or for the control of electrical energy by such radiation; Processes or apparatus specially adapted for the manufacture or treatment thereof or of parts thereof; Details thereof in which radiation controls flow of current through the device, e.g. photoresistors

Definitions

  • This invention is a novelmechanism for automatically directing or aiming a gun, search-light, telescope, or other devlce upon an aero lane in flight or other moving object 5 the mec anism being adapted to be operate in either day or night; and the mechanism automatically maintaining the gun or the like trained upon such moving object.
  • I mount the gun, searchli ht, telescope or the like upon a support which may be revolved about a vertical axis actuated by a motor and which support can revolve also about a horizontal axis actuated by a motor.
  • a telescopic camera on the aforesaid gun or the like is so mounted that when the camera is directed upon a moving object such as an airplane it. will throw an image of the plane upon a screen, provided withselenium strips, which strips are exposed to the shadow image, or to light projectedon the screen.
  • These selenium strips are respectively electrically connected to the motor which controls the rotation of the gun around the vertical axis, and to the motor which con-' '25 trols the rotation of the gun around the horizontal axis.
  • Resistances are placed in the electrical connections in such manner and of such value that when there is equal light on the selenium strips there will be no current passing through the motors but any movement of the aero lane or other moving objects will tend to s ift the image on the screen in some direction, and this shifting of this image relative to the selenium strips may produce a greater resistance in one or more of the strips, thereby causing current to pass to one or both of the motors, so that one or both of the motors will automatically operate according to the position of the image on the screen to shift the gun and keep the gun trained continuously upon the moving object.
  • This combined automatic control of the gun shifting motors will keep the gun aimed at the object so that whenever fired the gun will hit the object.
  • a search light similarly mounted and controlled keeps the object at night constantly illuminated, the only change in the aiming mechanism being that the direction of the current in the fields of the motor must be reversed in order to cause the aiming device to follow the bright portions of the screen instead of the shadowed portions.
  • Fig. 1 is a diagrammatic plan view of a gun equipped with my aforesaid novel train- 1n apparatus.
  • T ig. 2 is a diagrammatic side elevation thereof.
  • Fig. 3 is an enlarged diagrammatic view illustrating the efiect of the shadow of the image on the screen and its relation to the selenium strips or cells, also showing the wiring diagram for the electrical connections.
  • the gun I or other device such as a search llght, telescope, etc. which is desired to be maintained trained upon a moving object such as an airplane, is mounted upon a revolvable plate 2 adapted to rotate in either direction at proper times around an axis preferably vertical, the plate 2 being mounted upon a shaft 3 journaled in a suitable base 4.
  • Plate 2 is preferably circular and is provided at its periphery with gear teeth 2 meshing with a pinion 5 fixed to the shaft of an electric motor 6 carried by the base 4. Plate 2 however may be rotated about its axis by motor 6 in any other desired manner.
  • the trunnions 1 of gun 1 are disposed parallel with plate 2, and journaled in spaced uprights 2 carried by said plate 2. Fixedly mounted upon one trunnion is a gear wheel 1, of suitable diameter, meshing with a pinion 7 on the shaft of an electric motor 8 mounted upon the plate 2.
  • the gun 1 may be rotated about its trunnions 1 by motor 8 in any other desired manner.
  • the gun will be revolved about one axis by motor 6, and will be similarly revolved about an- 100 other axis'at right angles to the first by the "V5215 motor 8, the motors 6 and 8 being automatlcally controlled by novel means heremafter set forth.
  • a telescopic camera 9 is mounted upon gun 1 so that it will throw an image of the object aimed at .upon the screen 9 (F g. 3 of camera .9.
  • Screen' 9 is provided with our radially disposed strips or cells of selenium 10, 11, :12 and 13, (which stri' s may' be any photo-electric cell), the strips emg dlsposed 90 degrees apart and adapted to be exposed to th'eimage orlightpro ected upon screen 9.
  • These strips 10-13 inclusive are connected, as hereinafter explained, with the armature circuits of the direct current motors 6 and 8, the fields of the direct current motors 6 and 8 being supplied by independent sources of direct current 6 and 8 respectively.
  • the vertically disposed and diametricall opposed selenium strips 11 and 13 are connected in series, as shown, a common conductor 14 leading from the adjacent ends of said strips to the adjacent ends of resistance elements 15 and 16 likewise connected in series.
  • the outer ends of resistance elements 15 and 16 are connected by conductors 17 and 18 respectively to the outer ends of the strips 11 and 13,'and across the outer ends of resistance elements 15 and 16 is impressed a source of direct current supply 19.
  • a relay 20 connected with the armature circuit of the motor 8 which motor vertically adjusts the-gun 1.
  • Resistance elements 15 and 16 are of such value that no current will pass through the common conductor 14 when there is an equal amount of light upon the strips ll-and 13. Such a condition .exists when the image P (Fig. 3) of the plane,
  • the horizontally disposed strips 10 and 12 are similarly connected in series and their ad-- jacent ends connected by acommon wire 21 to the adjacent ends of resistance elements 22 and 23, the outer ends of which are connected respectively to the outer ends of strips 10 and 12 by conductors 24 and 25 and a source of direct current supply 26 is impressed upon the outer ends of resistances 22 and 23.
  • a relay 27 is also connected in conductor 21 and in the. armature circuit of the motor 6 which rotates the gun '1 about a vertical axis. The operation of the circuit for motor 6 is identical with that above described in connection with motor 8, and therefore needs no detailed description herein.
  • the combined automatic control of the motors 6 and 8 will keep the gun trained upon the moving object, so that whenever the gun is fired it will hit the object.
  • a searchlight mounted similarly to gun 1 will be controlled to constantly illuminate the moving object, the only necessary change in the wiring diagram being to reverse the direction of the field currents of the motors 6 and 8 so'as to-cause the device to operate by the brighter spots (instead of shadowed images P) on screen 9*, since at night an illuminated object is of course brighter than its background.
  • the guns aiming device, with the direction of the field currents of the motors 6 and 8 thus reversed, can be controlled to constantly illuminate the moving object, the only necessary change in the wiring diagram being to reverse the direction of the field currents of the motors 6 and 8 so'as to-cause the device to operate by the brighter spots (instead of shadowed images P) on screen 9*, since at night an illuminated object is of course brighter than its background.
  • the guns aiming device, with the direction of the field currents of the motors 6 and 8 thus reversed, can be controlled to constantly illuminate the moving object, the only necessary change in the wiring diagram being to reverse the direction of the
  • a movable member and means for automatically maintaining such member trained comprising mountings permitting movement.
  • Apparatus for maintaining a member trained upon a moving object comprising mountings permitting rotation of the member about two axes at right angles to each other; independent means for a justing the mountings about their respective axes; and electrical means controlled by a projected image of'the object for automatically controlling said adjustingmeans.
  • Apparatus for automatically mamtaining a member trained upon a moving ob ect comprising mountings permittlng rptatlon of the member about two axes at right angles to each other; a screen carried by the member upon which an ima e otthe ob ect 1s projected; two sets of lig t responsive elements on said screen, each set being in a normally balanced electrical circuit, and means for shifting the related mounting about its axis in a direction of rotation according to the preponderance of shaded areas of the elements in the set; whereby when the projected image equally shadows the elements of a set the re lated shifting means will remain inactive, but when the image moves to unbalance the shadowed portions of the elements in the set the related shifting means will be actuated.
  • Apparatus for keeping a member constantly trained upon a moving object comprising mountings permitting rotation of the member about two axes at right angles to each other; independent devices for adjusting the mountings about said axes; and electrical means controlled by a projected image of the object for automatically controlling the adjusting means; said electrical means comprising a screen carried by the member and upon which an image of the ob ect is projected; sets of light responsive elements on said screen, each set being in a normally electrical circuit, including the adjusting device for the related mounting, whereby when the image equally shadows the elements of a set the related adjusting device will be inactive, but when the image moves to unbalance the shadowed portions of the elements the related adjusting device will be actuated.
  • Apparatus for maintaining a member trained upon a moving object comprising mountings permitting rotation of the mem her about two axes at right angles to each other; an electrical motor and connections for adjusting the mountings about said axes; and means controlled by a projected image of the object for automatically controlling said motors; said controlling means comprising a screen carried by the member upon which the image of the object is projected, sets of selenium elements mounted on the screen image of the object equally shadows the elements in each set the related motor will reon a horizontal "axis; a reversible electric or motor and connections mounted on the platform for turning the gun on a horizontal axis, a telescope mounted upon the gun and a screen upon which the image of the object is projected; with independent electrical means controlled by the shifting of the image of the object upon the'screen for automatically actuating the motors to maintain the gun trained upon the object.
  • Apparatus for holding a gun or other device continually trained upon a moving object compr ising a platform rotatable about a vertical axis; a reversible electric motor and connections for rotating the platform; a gun mounted on the platform and rotatable on a horizontal axis; a reversible electric motor and connections mounted on the platform for turning the gun on a horizontal axis, a telescope mounted upon the gun and a screen upon which the image of the object is projected; two sets of light responsive elements on said screen disposed at an angle to each other; each set being included in a normally balanced electrical circuit controlling the operation of the related motor, whereby the motor is rotated in one or the other direction according to the preponderance of shaded areas of the elements in a set, the related motor remaining inactive when the pro ected image equally shadows the elements of a set but when the image moves and unbalances. the shadowed portions of the elements the related motor will be actuated.
  • Apparatus for keeping a gun or other device constantly trained upon a moving object comprising a platform rotatable about a vertical axis; a reversible electric motor and connections for rotating the platform; a gun mounted on the platform and rotatable on a horizontal axis; a reversible electric motor and connections mounted on the platform for rotating the gun on its axis, a telescope mounted upon the gun and a screen upon which the image of the object is projected by said telescope; two sets of diametrically disposed selenium elements mounted on the screen, and disposed at right angles to each other; each set comprising two elements included with the related motor in a normally balanced electric circuit, each set being adapted to rotate the motor in its related circuit in a direction accoiding to whichever" element in the set is not shadowed by the image; the related motor remaining inactive when the image of the object equally shadows the two elements, but when the shadowed portions of the elements in a 1? are unequal the related motor will be caused to rotate in a direction to

Description

Feb. 18, 1930. DROITCQUR 1,747,664
APPARATUS FOR AUTOMATICALLY TRAINING GUNS, ETC,, 0N MOVING OBJECTS Filed Feb. 1929 2 Sheets-Sheet 1 LAIAAAAA Feb. 18, 1930. H A. DROITCOUR APPARATUS FOR AUTOMATICALLY TRAINING GUNS, ETC,, ON MOVING OBJECTS Fil 1929 2 Sheets-Sheet gwuanto" 5. Patented Pet. s, 1930 UNIT-E sr'rs HOWARD ANDREW DROITCOUR, F EDGEWOOD, RHODE ISLAND Application filed I'ebruar y so, 1929. Serial No. 341,552.
This invention is a novelmechanism for automatically directing or aiming a gun, search-light, telescope, or other devlce upon an aero lane in flight or other moving object 5 the mec anism being adapted to be operate in either day or night; and the mechanism automatically maintaining the gun or the like trained upon such moving object.
In my invention I mount the gun, searchli ht, telescope or the like upon a support which may be revolved about a vertical axis actuated by a motor and which support can revolve also about a horizontal axis actuated by a motor. A telescopic camera on the aforesaid gun or the like is so mounted that when the camera is directed upon a moving object such as an airplane it. will throw an image of the plane upon a screen, provided withselenium strips, which strips are exposed to the shadow image, or to light projectedon the screen. These selenium strips are respectively electrically connected to the motor which controls the rotation of the gun around the vertical axis, and to the motor which con-' '25 trols the rotation of the gun around the horizontal axis. Resistances are placed in the electrical connections in such manner and of such value that when there is equal light on the selenium strips there will be no current passing through the motors but any movement of the aero lane or other moving objects will tend to s ift the image on the screen in some direction, and this shifting of this image relative to the selenium strips may produce a greater resistance in one or more of the strips, thereby causing current to pass to one or both of the motors, so that one or both of the motors will automatically operate according to the position of the image on the screen to shift the gun and keep the gun trained continuously upon the moving object. This combined automatic control of the gun shifting motors will keep the gun aimed at the object so that whenever fired the gun will hit the object.
A search light similarly mounted and controlled keeps the object at night constantly illuminated, the only change in the aiming mechanism being that the direction of the current in the fields of the motor must be reversed in order to cause the aiming device to follow the bright portions of the screen instead of the shadowed portions.
In the accompanying drawings I have diagrammatically illustrated a gun, the telescopic camera with screen, the motors, and electrical connections for actuating the gun, and will explain the invention with reference thereto to enable others skilled in the art to adopt and use the same;v and in the claims will summarizethe novel features of construction, and novel combinations of parts, for which protection is desired.
In the drawings:
Fig. 1 is a diagrammatic plan view of a gun equipped with my aforesaid novel train- 1n apparatus.
T ig. 2 is a diagrammatic side elevation thereof.
Fig. 3 is an enlarged diagrammatic view illustrating the efiect of the shadow of the image on the screen and its relation to the selenium strips or cells, also showing the wiring diagram for the electrical connections.
As diagrammatically shown in the drawing the gun I or other device such as a search llght, telescope, etc. which is desired to be maintained trained upon a moving object such as an airplane, is mounted upon a revolvable plate 2 adapted to rotate in either direction at proper times around an axis preferably vertical, the plate 2 being mounted upon a shaft 3 journaled in a suitable base 4.
Plate 2 is preferably circular and is provided at its periphery with gear teeth 2 meshing with a pinion 5 fixed to the shaft of an electric motor 6 carried by the base 4. Plate 2 however may be rotated about its axis by motor 6 in any other desired manner.
The trunnions 1 of gun 1 are disposed parallel with plate 2, and journaled in spaced uprights 2 carried by said plate 2. Fixedly mounted upon one trunnion is a gear wheel 1, of suitable diameter, meshing with a pinion 7 on the shaft of an electric motor 8 mounted upon the plate 2. The gun 1, however, may be rotated about its trunnions 1 by motor 8 in any other desired manner. Thus the gun will be revolved about one axis by motor 6, and will be similarly revolved about an- 100 other axis'at right angles to the first by the "V5215 motor 8, the motors 6 and 8 being automatlcally controlled by novel means heremafter set forth.
A telescopic camera 9 is mounted upon gun 1 so that it will throw an image of the object aimed at .upon the screen 9 (F g. 3 of camera .9. Screen' 9 is provided with our radially disposed strips or cells of selenium 10, 11, :12 and 13, (which stri' s may' be any photo-electric cell), the strips emg dlsposed 90 degrees apart and adapted to be exposed to th'eimage orlightpro ected upon screen 9. These strips 10-13 inclusive are connected, as hereinafter explained, with the armature circuits of the direct current motors 6 and 8, the fields of the direct current motors 6 and 8 being supplied by independent sources of direct current 6 and 8 respectively.
The vertically disposed and diametricall opposed selenium strips 11 and 13 (Fig. 3 are connected in series, as shown, a common conductor 14 leading from the adjacent ends of said strips to the adjacent ends of resistance elements 15 and 16 likewise connected in series. The outer ends of resistance elements 15 and 16 are connected by conductors 17 and 18 respectively to the outer ends of the strips 11 and 13,'and across the outer ends of resistance elements 15 and 16 is impressed a source of direct current supply 19. In the common conductor 14 is a relay 20 connected with the armature circuit of the motor 8 which motor vertically adjusts the-gun 1. Resistance elements 15 and 16 are of such value that no current will pass through the common conductor 14 when there is an equal amount of light upon the strips ll-and 13. Such a condition .exists when the image P (Fig. 3) of the plane,
or other object aimed at, equally shadows strips 11 and 13, (the image P on screen 9? during the day being of course darker than its background).
The motion of the airplane or the like moves its imageP in some direction across the screen 9,. If the image P moves upwardly then the image wiIl immediately shadow strip 13'more than strip 11 thereby producing a greater resistance in strip 13 than in 11, and
thereby unbalancing the circuit and causing current to flow, in one direction, through common wire 14, and this current, amplified-by the relay 20, flowsrthrough the armature of motor 8 and turns the gun in one direction about its trunnions until the image again equally shadows the strips 13 and 11,,at which time the .current will cease to flow through conductor14. If image P then moves downwardly upon the screen 9 the strip 11 will similarly be more shadowed than strip 13, and current will flow through conductor 14 in the oppositev direction, thereby causing motor 8 to rotate the gun 1 in the opposite direction until the image P again equally shadows strips 11 and 13.
, The horizontally disposed strips 10 and 12 are similarly connected in series and their ad-- jacent ends connected by acommon wire 21 to the adjacent ends of resistance elements 22 and 23, the outer ends of which are connected respectively to the outer ends of strips 10 and 12 by conductors 24 and 25 and a source of direct current supply 26 is impressed upon the outer ends of resistances 22 and 23. A relay 27 is also connected in conductor 21 and in the. armature circuit of the motor 6 which rotates the gun '1 about a vertical axis. The operation of the circuit for motor 6 is identical with that above described in connection with motor 8, and therefore needs no detailed description herein.
The combined automatic control of the motors 6 and 8 will keep the gun trained upon the moving object, so that whenever the gun is fired it will hit the object.
At night a searchlight mounted similarly to gun 1 will be controlled to constantly illuminate the moving object, the only necessary change in the wiring diagram being to reverse the direction of the field currents of the motors 6 and 8 so'as to-cause the device to operate by the brighter spots (instead of shadowed images P) on screen 9*, since at night an illuminated object is of course brighter than its background. The guns aiming device, with the direction of the field currents of the motors 6 and 8 thus reversed, can
then at night be made to follow the thus illuminated moving object which is flooded by the Searchlight.
I do not limit my invention to the exact form shown in the drawings, for obviously changes may be made therein within the scope of the claims,
I claim: v
1. In apparatus of the character specified, a movable member, and means for automatically maintaining such member trained comprising mountings permitting movement.
of the member about axes disposed at right angles; devices for independently adjusting each mounting about its respective axis; and electrical devices for automatically controlling said adjusting means controlled by the projected image of the object.
4. Apparatus for maintaining a member trained upon a moving object; comprising mountings permitting rotation of the member about two axes at right angles to each other; independent means for a justing the mountings about their respective axes; and electrical means controlled by a projected image of'the object for automatically controlling said adjustingmeans.
5. Apparatus for automatically mamtaining a member trained upon a moving ob ect; comprising mountings permittlng rptatlon of the member about two axes at right angles to each other; a screen carried by the member upon which an ima e otthe ob ect 1s projected; two sets of lig t responsive elements on said screen, each set being in a normally balanced electrical circuit, and means for shifting the related mounting about its axis in a direction of rotation according to the preponderance of shaded areas of the elements in the set; whereby when the projected image equally shadows the elements of a set the re lated shifting means will remain inactive, but when the image moves to unbalance the shadowed portions of the elements in the set the related shifting means will be actuated.
6. Apparatus for keeping a member constantly trained upon a moving object; comprising mountings permitting rotation of the member about two axes at right angles to each other; independent devices for adjusting the mountings about said axes; and electrical means controlled by a projected image of the object for automatically controlling the adjusting means; said electrical means comprising a screen carried by the member and upon which an image of the ob ect is projected; sets of light responsive elements on said screen, each set being in a normally electrical circuit, including the adjusting device for the related mounting, whereby when the image equally shadows the elements of a set the related adjusting device will be inactive, but when the image moves to unbalance the shadowed portions of the elements the related adjusting device will be actuated.
7. Apparatus for maintaining a member trained upon a moving object; comprising mountings permitting rotation of the mem her about two axes at right angles to each other; an electrical motor and connections for adjusting the mountings about said axes; and means controlled by a projected image of the object for automatically controlling said motors; said controlling means comprising a screen carried by the member upon which the image of the object is projected, sets of selenium elements mounted on the screen image of the object equally shadows the elements in each set the related motor will reon a horizontal "axis; a reversible electric or motor and connections mounted on the platform for turning the gun on a horizontal axis, a telescope mounted upon the gun and a screen upon which the image of the object is projected; with independent electrical means controlled by the shifting of the image of the object upon the'screen for automatically actuating the motors to maintain the gun trained upon the object.
9. Apparatus for holding a gun or other device continually trained upon a moving object; compr ising a platform rotatable about a vertical axis; a reversible electric motor and connections for rotating the platform; a gun mounted on the platform and rotatable on a horizontal axis; a reversible electric motor and connections mounted on the platform for turning the gun on a horizontal axis, a telescope mounted upon the gun and a screen upon which the image of the object is projected; two sets of light responsive elements on said screen disposed at an angle to each other; each set being included in a normally balanced electrical circuit controlling the operation of the related motor, whereby the motor is rotated in one or the other direction according to the preponderance of shaded areas of the elements in a set, the related motor remaining inactive when the pro ected image equally shadows the elements of a set but when the image moves and unbalances. the shadowed portions of the elements the related motor will be actuated.
10. Apparatus for keeping a gun or other device constantly trained upon a moving object, comprising a platform rotatable about a vertical axis; a reversible electric motor and connections for rotating the platform; a gun mounted on the platform and rotatable on a horizontal axis; a reversible electric motor and connections mounted on the platform for rotating the gun on its axis, a telescope mounted upon the gun and a screen upon which the image of the object is projected by said telescope; two sets of diametrically disposed selenium elements mounted on the screen, and disposed at right angles to each other; each set comprising two elements included with the related motor in a normally balanced electric circuit, each set being adapted to rotate the motor in its related circuit in a direction accoiding to whichever" element in the set is not shadowed by the image; the related motor remaining inactive when the image of the object equally shadows the two elements, but when the shadowed portions of the elements in a 1? are unequal the related motor will be caused to rotate in a direction to restore the balance. HOWARD ANDREW DROITCOUR.
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US3128061A (en) * 1945-08-11 1964-04-07 Thornton W Chew Automatic self-guidance system for movable objects
US3144644A (en) * 1948-11-23 1964-08-11 Ivan A Getting Gun fire control method and system
US3155969A (en) * 1947-12-06 1964-11-03 Goodyear Aerospace Corp Methods and apparatus for automatically guiding an airplane or the like
DE1237339B (en) * 1957-05-20 1967-03-23 Bausch & Lomb Optical Co Tracking device
US3357298A (en) * 1963-06-19 1967-12-12 North American Aviation Inc Star tracker including angularly disposed photoelectric strip surfaces
DE1288957B (en) * 1963-11-28 1969-02-06 Nord Aviation Fire control system with a telescopic sight and infrared locator
US3450479A (en) * 1956-01-26 1969-06-17 Us Army Direction finding apparatus
US3630601A (en) * 1969-02-24 1971-12-28 Kurt Lehovec Photoelectric registration of ball rotation as teaching aid for ball games
US3634689A (en) * 1969-04-22 1972-01-11 Hitachi Ltd Automatic position or condition control devices using relative rotation, linear positioning, and magnification
US3724783A (en) * 1952-07-01 1973-04-03 Us Navy Discriminatory missile guidance system
US3725576A (en) * 1962-09-12 1973-04-03 Us Navy Television tracking system
US3944738A (en) * 1973-12-11 1976-03-16 Minnesota Mining And Manufacturing Company Method to increase the visibility of game objects during telecasting
US4870267A (en) * 1988-01-13 1989-09-26 The Boeing Company Ambient light sensitive activator

Cited By (39)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2454651A (en) * 1940-08-03 1948-11-23 John H Homrighous Synchronizing system
US2446096A (en) * 1941-09-15 1948-07-27 Talbert Abrams Automatic leveler
US2473893A (en) * 1941-09-19 1949-06-21 Westinghouse Electric Corp Object detecting and indicating device
US2446316A (en) * 1942-09-14 1948-08-03 Wm Walter Owen Gun sighting and training apparatus
US2764698A (en) * 1942-11-23 1956-09-25 Arthur R Knight Control system
US2603780A (en) * 1943-11-12 1952-07-15 John H Homrighous Distant control system
US2450551A (en) * 1944-07-18 1948-10-05 United Shoe Machinery Corp Fire control mechanism for guns
US2719366A (en) * 1944-10-12 1955-10-04 Otto H Schmitt Bomb simulator
US2494663A (en) * 1944-10-27 1950-01-17 Linde Air Prod Co Self-synchronous cutting machine
US2680578A (en) * 1945-02-17 1954-06-08 Katz Leonhard Glide bomb
US2504118A (en) * 1945-08-02 1950-04-18 George C Evans Underwater sonic apparatus
US3128061A (en) * 1945-08-11 1964-04-07 Thornton W Chew Automatic self-guidance system for movable objects
US3112399A (en) * 1945-08-11 1963-11-26 Thornton W Chew Device for automatic homing of movable objects
US2654882A (en) * 1945-10-15 1953-10-06 Honeywell Regulator Co Aircraft radio apparatus
US2421012A (en) * 1945-12-10 1947-05-27 Thornton W Chew Homing system
US2587018A (en) * 1946-03-05 1952-02-26 Max J Weisfeldt Apparatus to record images of moving subjects
US2508468A (en) * 1946-06-19 1950-05-23 Linde Air Prod Co Contour reproduction
US3010102A (en) * 1947-07-05 1961-11-21 Bell Telephone Labor Inc Combination radar and thermalenergy detection system
US3155969A (en) * 1947-12-06 1964-11-03 Goodyear Aerospace Corp Methods and apparatus for automatically guiding an airplane or the like
US3144644A (en) * 1948-11-23 1964-08-11 Ivan A Getting Gun fire control method and system
US2877284A (en) * 1950-05-23 1959-03-10 Rca Corp Photovoltaic apparatus
US3041011A (en) * 1951-03-12 1962-06-26 Rand Corp Method and apparatus for vernier map matching and flight control therewith
US3724783A (en) * 1952-07-01 1973-04-03 Us Navy Discriminatory missile guidance system
US2766387A (en) * 1952-11-14 1956-10-09 Bolsey Jacques Autoamtic tracking apparatus for cameras and the like
US2892949A (en) * 1952-12-17 1959-06-30 Rene J Hardy Electronic spotting device, applicable in particular, for the guiding of rockets and other high speed appliances
US2787188A (en) * 1953-07-31 1957-04-02 Gen Precision Lab Inc Optical cross-correlator
US3019404A (en) * 1955-12-22 1962-01-30 Bulova Res And Dev Lab Inc Thermistors and methods of making same
US3450479A (en) * 1956-01-26 1969-06-17 Us Army Direction finding apparatus
DE1237339B (en) * 1957-05-20 1967-03-23 Bausch & Lomb Optical Co Tracking device
US3067330A (en) * 1957-12-13 1962-12-04 Louise B Hammar Gun sight
US3098934A (en) * 1960-02-04 1963-07-23 Gen Prccision Inc Sun tracker
US3725576A (en) * 1962-09-12 1973-04-03 Us Navy Television tracking system
US3357298A (en) * 1963-06-19 1967-12-12 North American Aviation Inc Star tracker including angularly disposed photoelectric strip surfaces
DE1288957B (en) * 1963-11-28 1969-02-06 Nord Aviation Fire control system with a telescopic sight and infrared locator
DE1288957C2 (en) * 1963-11-28 1974-09-12 Nord Aviat Soc Nat De Const Ae Fire control system with a telescopic sight and infrared tracking device
US3630601A (en) * 1969-02-24 1971-12-28 Kurt Lehovec Photoelectric registration of ball rotation as teaching aid for ball games
US3634689A (en) * 1969-04-22 1972-01-11 Hitachi Ltd Automatic position or condition control devices using relative rotation, linear positioning, and magnification
US3944738A (en) * 1973-12-11 1976-03-16 Minnesota Mining And Manufacturing Company Method to increase the visibility of game objects during telecasting
US4870267A (en) * 1988-01-13 1989-09-26 The Boeing Company Ambient light sensitive activator

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