US393831A - humphrey - Google Patents

Description

2 Sheets-Sheet 1 (No Model.)

A. s. 'HUMPHREY.

ELEVATOR.

. 'Pate nte djec. 4,1888.

N. FEI'ERS. PholwLilhugmpher. Washington, D. C

" UNITED STATES PATENT OFFICE.

ABRAHAM S. HUMPHREY, OF POUGHKEEPSIE, NEW YORK, ASSIGNOR TO THE EDIVARD STORM SPRING COMPANY, (LIMITED,) OF SAME PLACE.

ELEVATOR.

SPECIFICATION forming part of Letters Patent No. 393,831, dated December 4, 1888.

Application filed March 30, 1888.

To all whom it may concern.-

Be it known that I, ABRAHAM S. HUMPHREY, a citizen of the United States, residing at Poughkeepsie, in the county of Dutchess and State of New York, have invented certain new and useful Improvements in Hand-Elevators; and I do hereby declare the following to be a full, clear, and exact description of the invention, such as will enable others skilled in the IO art to which it appertains to make and use 2 5 to prevent any slipping of the rope around the hoist-drum by reason of its ribbed form; second, to guide the rope smoothly around thisdrum by means of the laterallyslidable guide-pulley for directing the weight end of the hoist-rope and increasing the friction; third, to furnish a brake attachment by means of which the large hoist or drive wheel may be stopped and held firmly to place, so as to sustain the load at any desired point; fourth, 3 5 to provide for the running of the hoist-rope in any sized well-hole by means of guide-pulley wheels for narrowing or spreading the rope after it passes over the large hoist-wheel, and, finally, by the combination of these improvements to furnish an inexpensive and convenient hand-elevator for light, store, factory, dwelling, tenement, or other use, which may be used'as readily as adumb-waiter and yet possesses many times the lifting capacity. I attain these objects by the mechanismillus- 'trated in the accompanying drawings, in which Figure 1 is a front view of the elevatorhoisting mechanism and well, showing the hoist-rope mechanism adjusted for a narrow elevator-well, and also showing the friction- Serial 'No. 269,000- (No model.)

clutch of the brake-lever attachment in an open state. Fig. 2 is a front view of the hoisting mechanism, showing the spreading of the rope over the pulleys adjusted for a broad 5 5 well, the friction-clutch being shown as clamping the large hoist or drive wheel. Fig. 3 is a transverse section of the hoisting mechanism, cut through line 3 of Fig. 4:. Fig. 4 is a top plan view of the hoisting mechanism. Fig. 5 is an enlarged front view of the clutch mechanism, operated by the brake-lever rope running over friction-pulleys. Fig. 6 is an enlarged vertical section of the same cut through line (5 (5 of Fig. 5, and Fig. 7 is an enlarged transverse section of a portion of the hoisting-drum.

Similar letters refer to similar parts throughout the several views.

A represents the elevator-well, on the top or shelf of which are placed the fixtures of the hoisting apparatus.

A is the car attached to one end, of the liftrope.

B B represent the frame forsupporting the mechanism.

C is the large drive or hoist wheel revolving on the shaft I), on which the small cogwheel E is fast. E is geared in the usual way with a larger cog-wheel, F, and that is fast to the shaft G, on which the ribbed hoist-drum H is also fast. Over this drum II the liftrope is given one or more turns as it comes from the top of the car A, and is then passed under the pulley-wheel I and over the pulley J down to the weight K, which is at the outer end of the lift-rope, and serves to counterbalance the weight of the car. This counterpoise-weight K gives about the right adjust ment for working when it is fifty per cent. heavier than the weight of the car when empty. The ribs h of the drum H serve to prevent the lift-rope from slipping when it is wound once or twice around the drum, and the position of the pulley-wheels I and J pre- 5 sents increased friction of the lift-rope X, and furnishes a nicer adjustment for working the elevator. These pulley-wheels I and J are made loose, so as to slide freely laterally on the shaft-pins i j, and thus accommodate IOO themselves to the position of the lift-rope X as it turns about the revolving hoist-drum.

This arrangement effectually prevents any riding or overlapping of the rope, such as would result if the frictimi-pullcys were rigid laterally.

To move the hoisting mechanism, itis only necessary to start the large driving-wheel in either direction desired by pulling the rope Y, which runs over the wheel 0. The motion is from it imparted to the hoist-drum II by the usual gearing of E and F. The motion is then imparted by the ribbed drum II to the hoist-rope attached to the car A and the weight of the car and load only serves to make the friction against the ribbed drum greater, so that it is possible to use a single lift-rope without attaching it to the hoist-drum except by frictional contact. The novel position and use of the frictional laterally-adjustable pulley-wheels I and J make the lift-rope work smoothly and easily in connection with the counteipose-wei gl it K.

In order to enable the one operating the elevator to stop it quickly and easily at any point where it is desired to hold the load, I use my novel lever-brake attachment shown in the drawings.

It represents the lever-arm pivoted on the supporting-frame B at I, and having at either end the rings 1) q for attaching operatingcords.

P is an upright lever-arm pivoted to L at I, having at the bottom a metal piece, Q, shaped to correspond with the circumference of the drive-wheel C.

On Q may be fastened a wooden shoe, R, fitted so as to engage firmly and evenly with the grooved surface of the drive-wheel t".

S is a metal fixture on the well-shelf with upright guide-arms ss,which serve to prevent the lever-arm P from being thrown out of a vertical position when the brake is brought up against the revolving wheel p is a supplementary guide-arm to make the lever-arm P work true.

The brake-cord Z is fastened in the eye q of the lever I), and may be used directly or made to pass alternately under and over the pulley-wheels n2 m n n',which work in bearings of the frames M N, 0 being a metal guard fastened to the frame N, so as to prevent the brake-cord Z from being displaced from the outer pulley, n. The cord Z passes onto the small weight 0, which is heavy enough, in connection with the frictional wheels in m n n, to keep the brake in place when once it is brought to engage with the driving-wheel. Ordinarily a slight movement of the wheel C, by means of the rope Y, in the direction opposite to that in which it was turning when the brake was applied will serve to disengage the brake,which then, by slightly raising the brake-weight 0, drops down free of the wheel by reason of its own weight, so nicely may the friction-wheels on m n n and the weight 0 be adjusted to counterbalance the longer arms of the brakelever; but if it should be found necessary, for any reason, the brake may be releasedby the positive movement imparted by a pull upon an opposite cord attached to the long arm at p and operating without the intervention of frictional pulley-wheels.

The details of the lever-brake attachment, as above described, are best shown in Figs. 5 and 6 of the drawings.

I11 order to adaptmy mechanism conveniently to any size of well-hole, I have devised the snide-wheel pulleys c c, by means of which the rope Y, for moving the drivingwheel may be spread so as to run near the sides of a broad well, as in Fig. 2, or may be drawn together for use in a narrow well, as shown in Fig. l. In one case the rope is made to pass outside and in the other case inside of the pulley-wheels c c.

It will be seen from the above description that the combination of the novel features of my invention affords a cheap, compact, but very efticient mechanism for hoisting and stopping a load much heavier than can be lifted and regulated by an ordinary dumbwaiter, it having a lifting capacity of at least five hundred pounds and being more easily operated than the ordinary dumb-waiter.

What I claim, and desire to secure by Let ters Patent, is I l. A brake attachment for hand-elevators, consisting of a brake-lever, IA, having a vertical arm, P, and a brake-shoe attached to said vertical arm, stationary guides s s, in which the arm 1 works, a brake-cord, Z, attached at one end to the lever l and the frietion-wheels n1. m n 11, over which the brakeeord passes to control the same, all combined substantially as described.

A hand-elevatorcomprising the drivingwheel geared as shown, with a concaved ribbed revolving hoist-drum, ll, the brakelever L, having a vertical arm, P, carrying a ln'ake-shoe, R, and the stationary guides s s,

the arm P, adapted to work in the guides, and the brake-shoe to engage the wheel t, all substantially as described.

A hand-elevator comprising the frame 1 the driving-wheel geared as shown, with the concaved ribbed hoist-drum ll, the laterally-slidable friction and guide wheels I and .l, the brake-lever Ii, having the vertical arm P and brake-shoe R, operating as described, and the friction-wheelsm m n n, for adjusting the ln'ake-ctn'd, all arranged for the purpose of raising or lowering by hand a loaded car, A, substantially described.

In testimony whereof Iaffixmysignature in presence of two witnesses.

ABRAHAM IIUMPIIREY.

\Vitnesses:

J. A. TUFTs, HENRY W. GILBERT.

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