US259190A - Hoisting apparatus - Google Patents

Description

UNITE STATES PATENT OFFICE.

EDWARD B. MEAIYARD, OF GENEVA, WISCONSIN.

HOISTING APPARATUS.

SPECIFICATION forming part of Letters Patent No. 259,190, dated June 6, 1882.

I Application filed April 24, 1882. (No model.)

To all whom it may concern:

Be it known that I, EDWARD B. MEATYARD, of Geneva, in the county of Walworth and State of Wisconsin, have invented a new and useful Improvement in Hoisting Apparatus, of which the following is a full, clear, and exact description.

My invention relates to the class of hoistin g-machines in which one bucket, cage, or car counterweighs another in a'double well or shaft, such as is necessary in mines for hoisting coal and other material to the surface.

It has for its object, first, to save the rope from destructive wear, which is inevitable where a drum is-used; and, second, to save a large per cent. of the power which must be wasted in needless friction where a drum is used.

It consists in using three or more frictionpulleys of corresponding diameter for one or more ropes with independent deep spur-cog rims of larger diameter and less face than the pulley. A rubber or other non-metallic ring is fastened between this cog-rim and an annular plate on the side of the pulley by bolts. This forms the cushion for the rope, which is held in place laterally by the cogs on one side and the annular plate on the other.

It further consists in mounting said pulleys on suitable shafts and adjusting them in a frame so as to be in one plane at right angleswith their axes, and so that their cog-rims may- Figure 1 is a sectional elevation of my im-' proved hoisting-machine, and Fig. 2 is a sectional side view of the same. Fig. 3 is a detail section.

B B B are pulleys corresponding in diameter, each having a spur-cog rim of sufficiently larger diameter to form one side of the score for the rope.

O O C are annular plates, .which are attached with suitable bolts, and serve the double purpose of clamping the friction-bands f firmly (see Fig. 3) and of keeping the rope in its place. If two ropes are used, one must be on each side of the cog-rim; and duplicate annular plates 0 G O are fastened each side of each pulley B B B D is a pinion meshing into the cog-rims of pulleys Band B to drive the train of pulleys and the ropes in either direction to raise one cage and lower the other.

A is the rope, passing up one side of the pulley B and down the other side under pulley B, thence upward and over pulleys 'B and 'down again.

When it is understood that pulley B meshes into pulley B and B into pulley B and that pulley B does not mesh into B, it can be readily seen that the pulleys B B B wheii operated by the pinion D, exert an active frictional adhesion nearly four and one-third times as great as one of them could exert when acting alone and both ends of the rope hanging free. WVith five pulleys of corresponding diameter and other conditions the same the frictional adhesion can be readily seven and two-thirds that of a single pulley.

1 do not limit myself to having all the pulleys in any train of corresponding diameter. Any one of them may be larger or smaller to suit the exigencies of any case and work satisfactorily, provided the cog-rim is propor- I tionate.

Having thus fully described my invention, I claim as new and desire to secure by Letters Patent 1. ln hoisting machinery, in combination with a pinion and ropes, three or more fric- EDWARD B. MEATYARD.

Witnesses: I

A. H. KENDRIGK, E. LATIMER.

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