US320023A - Hoisting-drum for elevators - Google Patents

Description

(No Model.) '3 Sheets-Sheet 1..

P. L. WEIMER. HOISTING DRUM FOR ELEVATORS.

Patented June .16, 1885;

/ 97% Attorneys (No Model) Sheets-Sheet 2. P. L. WEIMER.

HOISTING DRUM FOR ELEVATORS.

N0. 320,023. Paten'tedJune 16, 1885.

m f I m Illlll .Illll WITNESS s z 697W Attorneys u. PETERB. Phmo-Lhhognnmr. Wahlngmn, n. c.

(No Model.) 3 Sheets-Sheet 3.

P. L. WEIMER.

HOAISTING DRUM FOR ELEVATORS. v NO. 320,023. Patented June 16, 1885.

I.II

II I i NITIED I STATES PATENT- Fr es.

PETER L. WEIMER, OF LEBANON, PENNSYLVANIA.

HOISTlNG-DRUM FOR ELEVATORS.

SPECIFICATION forming part of Letters Patent No. 320,023, dated June 16, 1885.

Application filed May 12, 1885. (No model.)

To all whom it may concern:

Be it known that I, PETER L. WEIMER, a citizen of the United States, residing at Lebanon, in the county of Lebanon and State of Pennsylvania, have invented certain new and useful Improvements in Hoisting-Drums for 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 art to which it appertains to make and use the same.

Experience in operating hoisting-engines has demonstrated the fact that much of the difficulty attending their successful operation is due to the imperfections which exist in the means employed for locking the shaft and the drum together and regulating the speed or velocity of the drum and the elevator-car in the descent of the latter.

My invention has for its object the construction of a frictional brake for hoisting-drums, which combines economy, simplicity, safety,

and durability, and is especially designed for small hoisting-engines, such as are used for hotel-elevators, unloading vessels, 850., but is not limited thereto, as it is applicable to engines used for other purposes.

With these objects in view my invention consists in the combinations of devices here- .with heads A and A, and is mounted upon a shaft, 13, which is journaled in bearings B and B.

G represents the master-wheel, to which motion is imparted by a pinion. (Not shown.)

The inner surface of the rim of the wheel or disk, upon which the teeth are formed, is bored out to receive a ring, D, of chilled cast metal or steel, which is detachably secured to the wheel by suitable bolts.

(Not shown.)

The inner surface of the ring D is shown serrated; but it and the shoe may be plain.

'E represents a brake-shoe, of soft metal, having a serrated outer surface to correspond with the serrations on the inner surface of the ring D. The brake-shoe E has formed on it a lug, E, for the reception of a bolt, D, which is passed through the head A of the drum A and the lug E for the purpose of securing the two together to transmit the power of the brake to the drum, to lock them for hoisting purposes, and to control the speed or velocity of the revolving drum when lowering.

F represents lugs on the shoes E, projecting toward the hub of the Wheel, and to which one end of toggle-levers G are attached by bolts H. The opposite ends of the toggle-levers are connected to lugs I on the sliding collar J in like manner. V

K represents lugs upon the opposite ends of the brake-shoe E, which is separated, as shown, to admit of its being expanded by the toggle-levers G.

L represents a bolt,which is passed through the lugs K K, and between the head on one end and the nut on the opposite end and each lug there is mounted a spring, M, the function of which is to draw in the split ring E from contact with the rings D and keep the shoe binding on thetoggles, to prevent any rattling or lost motion when the pressure of the togglelevers is removed and the car is being run down by friction.

The shaft B is provided with a longitudinal opening, N, through which a rod, O, is passed, the rod being secured to the sliding collar J by means of a pin, P, which has longitudinal movement in a slot, Q, in the shaft B. In the outer end of the said shaft B is formed a recess for the reception of sleeve or screw nut R by counter-boring the opening for the rod 0. The screw-nut R has at its inner end an outwardly-projecting flange.

Around the sleeve screw-nut R are placed friction-rings S, which rest against the shoul.--

der formed by the projecting flange on' the screw-nut, and are held in place by a screwthreaded follower, T,'within which follower the screw-nut R revolves and is held in the enlargement of the bore of the shaft by said follower.

IOO

' for revolving the nut R. The screw-nut is provided with threads adapted to engage with the screw-threads on the outer end of the rod 0, so that by revolving the nut in one direction,by means of the hand wheel or crank, the rod 0 will be moved toward the master wheel 0, thereby forcing the brake-shoe E against the chilled ring D, through the medium of the sleeve or sliding collar J and the toggle-levers G. By turning the wheel or crank in theopposite direction the screw-nut. R is correspondingly rotated, and the rod 0 will draw the sliding collar J back, which, through the medium of the levers G, will release the brakeshoe, and the springs M will contract the shoe and remove it from contact with the chilled ring D.

It will be observed that a very slight movement of the collar J through the medium of the rod 0, the nut R, and the hand-wheel U will expand the soft-metal shoe J and contract the same, and thus apply or release the frictional contact of the two metallic surfaces.

It will also be observed that any movement of the brake-shoe is subject to the will of the "operator,who may apply the shoe with 'suflicar is controlled entirely by the friction-brake,

whereby steam may be cut off from the engine and the car descend by gravity.

One of the important advantages of my invention, that the frictional surfaces can be brought into contact under such pressure that the drum and the shaft (through the medium of the master-wheel) will be completely locked together beyond the possibility of the slipping of the drum, and that'the same device which looks the drum and the shaft so securely for hoisting purposes may beapplied under such slight pressure as to control the velocity of the drum when the car is being lowered, and at the same time provide eflicient means whereby the operator may instantly stop the car at any point in its descent.

Having thus fully described my invention, what I claim is-- 1. The combination of a hoistingdrum, a master-wheel, a chilled cast-iron ring, a softmetal shoe attached to the drum, and means, sgbstantially as described, for expanding the 5 0e.

2. The combination of a hoisting-drum, a disk provided with a laterally-projecting rim, a chilled cast-iron ring detachably secured to the disk, a soft-metal shoe secured to the drum, a shaft which supports the drum, a sliding sleeve upon the shaft, toggle-levers between the sleeve and the shoe, and means, substantially as described, for expanding and contracting the soft-metal brake-shoe.

- 3. The combination of a disk provided with a laterally-projecting flange or rim having its inner surface bored out, a ring of chilled cast metal fitting within the ring of the disk, a brake-shoe adapted to fit and bear against the chilled ring, and means, substantially as described, for applying and releasing the frictional surfaces, substantially as described.

4; The combination of a disk or wheel, a hard-metal ring, a soft-metal expansible brakeshoe, and means, substantially as described, for applying and releasing the frictional surfaces, substantially as described.

5. The combination of a disk or wheel, a hard metallic ring removably secured thereto and having its inner surface serrated, a softmetal brake-shoe having corresponding serrations, and means, substantially as described, for applying and releasing the frictional surfaces.

6. The combination of a disk or wheel having a laterally-projecting flange or rim, a hardmetal ring detachably secured to the disk and having its inner surface serrated, a softmetal expansible ring provided with corresponding serrations, and means, substantially as described, for expanding and contracting the expansible ring.

7. The combination of a drum and a disk mounted upon a common shaft, a frictional 9. The combination of afriction-brake, the

shaft, the rod passing through the shaft'and screw-threaded at its outer end, the screwthreaded sleeve-nut, the follower, and a handwheel secured to the sleeve-nut, substantially as described.

10. The combination of the shaft, a rod passing through the shaft and screw-threaded at its outer end, a shouldered screw-threaded nut, a follower, and friction-rings interposed between the collar on the nut and the follower,

substantially as described.

In testimony whereof I afiix my signature in presence of two witnesses.

PETER L. WEIMER.

Witnesses:

W. MORRIS WEIDMAN,

JOHN A. W'EIMER.

Images