US1097233A - Hoisting apparatus. - Google Patents

Description

J. A. KEARNEY.

HOISTING APPARATUS. APPLICATION FILED JULY}, 1913.

1,097,233, Patented May 19, 1914.

2 SHEETS-SHEET l.

J. A. KEARNEY.

HOISTING APPARATUS.

APPLICATION FILED III Patented May 19, 1914.

2 SHEETS-SHEET 2.

WW 2344M UNITED STATES PATENT OFFICE.

JOHN A. KEARNEY, OF NEWARK, NEW JERSEY, ASSIG-NOR TO GILLIS & GEOGHEGAN, OF NEW YORK, N. Y., A FIRM.

HOISTING APPARATUS.

Specification of Letters Patent.

Patented May 19, 1914..

To all whom; it may concern:

Be it known that I, JOHN A. KEARNEY, a citizen of the United States, residing at Newark, in the county of Essex and State of New Jersey, have invented a certain new and useful Improvement in Hoisting Apparatus, of which the following is a specification. I

The invention relates to hoisting machinery and more especially to apparatus for hoisting relatively light loads by hand, and the object of the invention is to provide means whereby the load may be lowered under control by the brake while the hoisting crank stands stationary, thus avoiding danger of accident due to the idle revolutions of the crank in rapid lowering; and for automatically disengaging the crank-gear by the act of applying the brake, so that the lowering operation may be safely performed by one hand; and also to provide locking means for insuring against accidental disengagement of the crank-gear during the hoisting operation.

The invention consists in certain novel features and details of construction and arrangement by which the above objects are attained, to be hereinafter described and pointed out in the claims.

The accompanying drawings form a part of this specification and show the invention as it has been carried out in practice.

Figure l is a side elevation of the improved hoisting apparatus in position for service on a standard. The succeeding figures are on a larger scale. Fig. 2 is a plan view of the apparatus. Fig. 3 is a rear elevation, partly in vertical section, and with certain portions broken away or omitted. Fig. 4 is a vertical section, partly in elevation, the plane of section being indicated by the line -14 in Fig. 2.- 1

Similar letters of reference indicate the same parts in all the figures.

A is a standard which may be understood to be received in any suitable support and having a socket at its upper end in which is'inounted a strong cylindrical stud B forming part of an overhung frame in which the hoisting mechanism is supported. The frame has two outwardly extended arms B in which are mounted two parallel horizontal shafts Gand D, the former a relatively fixed winding-shaft carried at the an tremity of the arms, and the latter a slidable drive-shaft carried at the midlength of the arms.

On the winding-shaft C is a gear-wheel C, a WlIlCllIlg-dl'l'lfllflr spool C on which the hoisting cable M is wound, and av brakedrum C all fast on the shaft which revolves in the bearings B in the arms. The driveshaft D carries a pinion D adapted to mesh with the gearwheel C and a cone D to be described. This shaft has a square at one end to receive a crank F bywhich it may be rotated and through the pinion and gear- ,wheel correspondingly rotate the windingshaft G and spool G The shaft D is slidable axially and is extended outwardly at the end opposite to the crank, to permit such endwise movement without escaping from its bearings B in the arms B Partially encircling the brake-drum is a.

brake-bandE attached at one end to the pin G at the upper end of a brake-lever G pivoted to the frame at g, and at the other end to a pin G2 on the brake-lever below the pivot. Movement of the brake-lever toward the standard changes the positions of the pins Gr G in such manner asto tighten the band and'thus hold the brake-drum and its shaft against rotation.

On the brake-lever is an arm Gr lying normall in contact with or adjacent to the sur ace of the cone D at a point near its greatest diameter, and as the lever is moved in the act of applying the brake, the arm Gr acting on the inclinedisurface of the cone forces the latter and its shaft to move endwise, thus sliding the teeth of the pinion D on those of the gear-wheel C until at the. point at which the brake friction is sufficient to hold the load, the teeth .of the pinion are disengaged entirely from the gearwheel and the suspended load held by the brake alone through pressure applied through the brake-lever. In this condition the load may be lowered at any desired speed and under full control by relaxing and varying the pull upon the brake-lever.

WVhen the load is lowered and another is to be hoisted, the drive-shaft D is pushed I shaft as above described and is thus always in position to oppose lowering even though the pinion be but partially engaged with the gearwheel. To insure this positlon for service at all times, it is preferable to form the inner end of the pawl with a projecting toe H arranged to strike the upper face of the frame and prevent the rise of the pawl farther than is required for its action with the teeth of the pinion, and not permit it to be turned. idly backward.

To insure against accidental endwise movement of the shaft during the hoisting operation, a hinged locking-piece J is provided, pivoted to the frame at j and lying upon the shaft D between the plane face of the cone D and a boss D on the pinion D. A handle J permits the. locking-piece to be easily tilted up out of the way when the brake is to be applied and the shaft shifted. In this condition the locking-piece rides idly upon the cylindrical high portion of the ,cone until on the reverse axial movement of the latter it falls automatically into place between the cone and boss.

It is obvious that the brake should take hold before the complete disengagement of the pinion, which latter with its pawl sus-- tain the hoisted load; the desired close adjustment is attained by lengthening or shortening the brake-band ET K is a yoke pivoted to the pin G and having a rod K extending through a housing E .on the end of the brake-band. The projecting end of the rod is screwthreaded and receives a nutand jam-nut by which the brake-band may be tightened or slackened as desired.

The apparatus permits a load, as for example a can of ashes, to be hoisted from a cellar, and by the use of one hand only controlling the brake-lever, to be rapidly lowered upon the sidewalk or upon a truck in position to receive it, withoutthe risk of accidcnt attendant upon holding the load suspended by the crank while a holding-pawl is released, and during the succeeding lowering operation produced by a reverse movement of the crank.

I claim z-- 1. In a hoisting apparatus, a winding shaft, a gearwheel and winding drum fixed thereon, a brake device on said shaft, a lever for operating such brake device, an axially slidable, drive-shaft, a pinion fixed on said drive-shaft, arranged to mesh with said gearwheel, a cone fixed on said drive-shaft,

and means carried by said lever for engagin said cone and moving said drive-shaft axially, thereby sliding said pin on out of mesh with said gearwheel in the act of applying the brake.

2. In a hoist-ing apparatus, a windingshaft, a gearwheel and winding drum fixed thereon, a brake device on said shaft, a lever for operating such brake device, an axially slidable drive-shaft, a pinion fixed on said drive-shaft, arranged to mesh with said gearwheel, a cone fixed on said drive-shaft, means carried. by said lever for engaging said cone and moving said drive-shaft axially, thereby sliding said pinion out of mesh with said gearwheel inthe act of applying the brake, and a movable locking means for holding said drive-shaft against such axial movement.

3. In a hoisting apparatus, a frame, a winding-shaft mounted in such frame, a gearwheel, spool, and brakedrum fixed on said winding-shaft, a brake-lever on said frame, a brake-band secured to said lever wheel, and acone fixed on said drive-shaft in the path of said arm and arranged to be acted upon by said arm in applying the brake, to move said drive-shaft axially and slide said pinion out of mesh with said gearwheel.

4. In a hoisting apparatus, a frame, a winding-shaft mounted in such frame, a gearwheel, spool, and brake-drum-fixed on said winding-shaft, a brake-lever on said frame, a brake-band secured to said lever and encircling said brake-drum, an arm on said lever, a crank-operated drive-shaft mounted in said frame and arranged to slide axially therein, a pinion fixed on said driveshaft arranged to mesh with said gearwheel, a cone fixed on said drive-shaft in'the path of said arm and arranged to be acted upon.

by said arm in the act of applying the brake, and a movable locking-piece on said fram and engaged with said drive-shaft.

5. In a hoisting apparatus, a frame, a winding-shaft mounted in said frame, a gearwheel, spool, and brake-drum fixed on said winding-shaft, a brake-lever on said frame, a brake-band secured'to said lever and encircling said brake-drum, an arm on said lever, a crank-operated drive-shaft mounted in said frame and arranged to of said arm and arranged to be acted upon by said arm in tl act of applying the brake, and means for adjusting-the length of said ln'ake-band.

T. A shaft with a winding dram fixed thereon, an endwise movable drive shaft, a pinion fixed thereon, a gear wheel for 00- operatioi'i with said pinion, a pivotally' mounted pawl laterally extended to engage said pinion in all positions of the latter, and means tor preventing accidental endwise movement of said shaft while the pinion is engaged with the gear wheel.

8. A shaft with a winding drum fixed thereon, an endwise movable drive shaft, a pinion fixed thereon, a gear wheel for cooperation with said pinion, apivotally mounted pawlv laterally extended-to engage said pinion in all positions of the latter, and

means for preventin accidental endwise movement of said sha While the pinion is engaged with the gear wheel, said means comprising a hinged locking member adapted to lie upon the shaft adjacent a boss on said pinion.

S A shaft with a winding drum fixed thereon, an endwise movable drive shaft, a pinion fixed thereon, a gear wheel for cooperation with said pinion, a pivotally mounted pawl laterally extended to engage said pinion in all positions of the latter, means for preventing accidental endwise movement of said shaft while the pinion is engaged with the gear wheel, said means comprising a hinged locking member adapted to lie upon the shaft adjacent a boss on said pinion, and a cone member fixed on said shaft upon which said locking member idly rides when out of operative position.

In testimony that I claim the invention above set forth I aflix my signature, in presonce of two witnesses.

J OHN A. KEARNEY.

Witnesses:

. CHARLES R. SEARLE,

LILLIAN H. \VIKHUsEN.

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