US146492A - Improvement in hoisting-machines - Google Patents

Description

G. TIMPE. Hoisting-Mauhines.

Panama 1an. 13,1874'.

No. l46;492.

4 Smerp-sheet 2.

Hoisting-Ma-chines.

Patented]an.13,18l74.

AM. Film1( 17H0 GRAPHIC La M )Hassan/vs! Mams! Figs. 1 and 2.

'UNITED SrA'rEs GUSTAVUS C. TIMPE, OF NEW ORLEANS, LOUISIANA.

IMPROVEMENT IN HOISTING-MACHINES.

Specification forming part of Letters PatentNo. 146,492, dated January 123, 1874; application filed August 2, 1873.

To all whom it may concern:

Be it known that I, GUsTAvUs C. TrMrn, of New Orleans, in the parish of Orleans and State of Louisiana, have linvented certain Improvements in Hoisting-Machines, of which the following is a specification: f

The object 'of my invention is to provide a mechanism for hoisting-machines, which will automatically stop bot-h the ascent and descent of the car or platform at any desired point,

and thus prevent all danger resulting either from overwindin g or from unchecked descending when the operator has lost control of the machine by the breaking of the check-lines. My invention consists mainly in combining with any ordinary hoisting-machine or elevator a revolving spirally-threaded drum, or a screw, provided with shiftable stops, and acting through intermediate mechanism, so as to apply the brake at the desired points'in the ascent and descent of the platform or car, suitable connection being also made with the slideva-lve, when the hoisting-machine is operated by a steam-engine direct, to shut oit' steam simultaneously with applying the brake.

Figure l is a side elevation of a hoistin g-m achine embodying `my improvements. Fig. 2 is a plan view of the same. Figs. 3 and 3 are detail views representing the mechanism intermediate between the screw or spirally threaded drum and the bra-ke and slide-valve. y Fig. 4 is an end elevation of the machine shown in Fig. 5 represents in detail the spirally-threaded drum or screw, its adjustable and shiftable stops, the sectoral or segmental ways, and the slide through which the system of levers and connections controlling the brake and slide-valve is actuated. Figs. Gand 7 represent my invention applied to a hoisting-machine operated from aline of shafting.

The same letters off reference are used in all the g'ures in the designation of identical parts.`

In the example illustrated in the first five gures of the annexed drawings, the main shaft A of the hoisting-machine is driven by friction-pulleys C, C1, and C2, the latter of which is keyed to the driving-shaft of a double cylinder steam-en gine. The idler-pulley C1 turns in bearings which are automatically adjusted,

to preserve the contact of thepulleys with one another, by weighted arms or levers Gf. The main shaft A, carrying the hoisting-drum B and the brake-wheel D, projects `through its bearing upon the side of the brake-wheel, and carries on this overhunend adrum, E, the `surface of which is threaded spirallyfrom end to end. This spirally-threaded drum acts upon the projection j', which enters between its threads, to move the slide F back and forth, according as it revolves in one direction or the other. This slide F moves in `horizontal ways of the plate F1, which is arranged parallel to the surface of the drum to slide in a vertical arc in ways formed in` the side of the frame ofthe ange F 2 thereof. The sliding plate Fl is linked to the short arm of the check-lever G, by means of the connecting-rod G1. The check-lever is fixed on the overhung end of the rock-shaft G2, which carries an` arm, H2, connected by the rod H to one arm of the rocking beam H, which the machine. The rocking beam carries" at each end, on a laterally-projectingstud, an anti-friction roller, h, upon which the arm I, which is secured at one end to the `coupling D2 of the strap Dl of the brake-wheel, is .supported. The outer end of the arm I carries a friction-strap to the brake-wheel with proper force, to stop the rotation of the main shaft of the hoisting-machine, when it is allowedto descend. y

'When the brake is applied, asshown in Figs. l and 3, the weighted arm I rests upon both ends of the rocking beam H, which then` asmental ways which sustain it. By turning the check-lever G up or` down, the weighted arm I is lifted by one end or the other of; the rocking beam H, whereby the strap Dlis opened and the friction removed from the brake-wheel, so that the machine may operate either to elevate or lower the car or platform, as the case may be. i

The spirally-threaded drum E is` provided at each end with an adjustable and shiftable stop, E', which, as the slideF approaches either end of machine, and the outer side of the segmental turns on a stud projecting from vthe frame of weight, I', sufficiently ponderous toapply the sumes a nearly-horizontal position, and holds" the sliding plate F, through the intermediate ,p connections, in a central position in the segthe drum, strikes its projection f, and shifts the sliding plate It, together with its lateral slideF f, from its respective extreme position at one end or the other of its ways to a central position,

s which will arrange the parts, as best seen in Fig. 3, applying the brake by means of the weighted arm I, and stopping the machine. The stops E consist of a clip, e, which embraces the outer thread of the drum, and can be secured at any desired point of its circumference by a set-screw, el, and a slotted arm, c?, the inner end of which may have a lip to hook into the channel between the threads, and which can be adjusted laterally on the clip across the face of the drum. By adjusting this arm and shifting the entire stops, the means are provided for automatically applying the brake after the main shaft and hoistin g-drum have made the required number of revolutions to lift or lower the load the necessary distance. Both the spirally-threaded drum and the adjustable arms of the stops may be graduated to facilitate their adjustment. The check-lever is controlled by the ordinary check rope or ropes, by which the machine may be started and also stopped at intermediate points. The rock-shaft G2 is connected by .arms K2 and K1 to a parallel rock-shaft, K, the arm K3 of which is pivoted to the lstem L1 of the slide-valve L, which controls suitable steam-ports and governs the admission of steam to the cylinders in such a way that the engines may be reversed at will by suitably operating the check-lever G. The valve is so connected with the brake-mechanism that simultaneously with applying the brake steam will be shut off.

In Figs. 6 and 7 I have shown' my invention as applied to a machine driven from a line of shafting through a belt, M, and the spirally-threaded drum is carried on a counter-shaft, geared to the main shaft of the hoisting-machine.

All the main features of my improvements, as heretofore described, are retained, and only slight modifications `in the arrangement ofthe various parts are made, necessitated by the new conditions. The driving-belt is kept taut by the gravitating belt-tightener N, pivoted by means of arms N, to the driving shaft.

To guard against accidents which might result from the breaking of the belt, I pivot arod, O, to the outer end of arm I, and arrange it to stand with its upper end directly under one of the arms of the belt-tightener, so that,in case the belt breaks, the belt-tightener will bear down on this rod, and, pushing it downward, turn the arm I so as to apply the brake. The rod O should be supported by a suitable guide.

It is desirable to have the spirally-threaded drum or screw travel at the surface as many feet in a given time as the surface of hoistingdrum, or, better still, a little faster. This iseasily accomplished by making this drum just a trifle larger 4in diameter than the hoistingdrum, when both are mounted on the same shaft; and where they are placed upon different shafts this relative surface speed may readily be obtained by gearing up or down,

as the case may be. The drums of hoisting` screw and intermediate mechanism to alitomatically apply the brake atany given point, substantially as specified.

2. The combination of the spirally-threaded drum or screw E, stops Ef, lateral slide F j', and sliding plate Ff, suitably connected to the brake mechanism, substantially as and for the purpose specified.

3. The combination of the spirally-threaded drum or screw E, stops E', lateral slide F f, sliding plate F', rod Gl, check-lever G, rockshaft G2, arm H2, link H1, rocking-beam H. and weighted arm I I of the friction-strap of the brake-wheel, substantially as and for the purpose specied.

4. The shiftable and adjustable stops E', composed of the clips e el and slotted arms e2, substantially as and for the purpose specified.

5. rlhe brake-Wheel of a hoisting-machine and reversing-valve of a steam-engine, in combination with a spirally-threaded drum or screw and intermediate mechanism to automatically both apply the brake and shut oft' steam at any given point in the revolutions of the hoisting-drum, substantially as speci- Jlied.

6. The combination of the belt-tightener N N rod O, and weighted arm I I of the friction-strap ofthe brake-wheel, substantially as specified.

In testimony whereof Ihave hereunto signed my name this 2d day of July, 1873, in presence of two subscribing Witnesses.

GUSTAVUS C. TIMPE.

Witnesses:

C. TIMPE, JOSEPH WALKER.

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