US1580309A - Hoist mechanism - Google Patents

Description

April 13 1926.

'4 Sheets-Sheet 1 D F LEPLEY HOIST MECHANISM Filed Oct.

A ril 13 1926. 1,580,309

D. F. LEPLEY HOIST MECHANISM Filed Oct.'2 1921 4 Sheets-Sheet 2 April 13,19213. 1,580,309

. D. F. LEPLEY HOIST MECHANISM Filed Oct 22 1 4 sheets sheet 5 attozwelqd A ril 13 1926. 1,580,309

D. F. LEPLEY HOIST MECHANISM Filed Oct 22 1921 4 Sheets-Sheet 4 Patented Apr. 13,1926;

'.DANIEL F. LEPLEY,'OF CONNELLSVILLE,

BENNSYLVANIA. I

HOI SEI.v MECHANISM.

Application filed was 22, 192i. ,sfena No. 509, 50.

To kill whom it may concern;

Be it known that I, citizen of the United States, residing at DANIEL F. LEPLEY, a

Con-

nellsville, in the countyof Fayette and State of Pennsylvania,

have invented anew and useful Hoist l\lechaiiisni, nof which the following is a specification; This invention relates nism for use in actuating to hoisting mechamine cages and the like and-it is designedmore particularly as an improvement upon in my Patent 1319,1555,

:In the construction referred to there are the structure disclosed dated 1 June 13th,

employed rods connectedto arackbar receiving motion through suitable mechanism from a winding drum so that when the operated cage approaches one of itsli nitsiof movement the operation be gradually slowed down. and finally- V Asa part of the mechone of thearodsrac brought to a stop.

anism for this purpose of :the parts will tuated by the drum driven mechanism is provided with, projections whereby: either one of opposed stoparms are actuated for the purpose of automatically shifting, the

lever or levers controlling anism to neutral position of the hoist mechto slow down and stop the operation of the mechanism.

7 It has been heretofore described and application mentioned shorthoist the button or shifting the. stop arm will arm. slightly below or above hasnot been possible to to a stop under the the cage has stopped the landingstage it operate the controlling found in mechanism such as as disclosed .in my that where there is a projection used .for

Consequently if lever 01 levers by hand in ordertomove the cage to exact position.

It is an objectof the present invention to improve upon the, mechanism hereinbefore described by providing stop arms which Will operate as heretofore butwhich,

willallow the controlling lever or levers less,

neverthe to be shifted slightly against the arms and sufliciently to start the hoisting mechanism,

so to bringthe cage to the'proper level.

With the foregoing and as the description.

iew which will appear other objects in proceeds, the invention resides in the combination and arrangement 'of parts and in the details of construct on hereinafter-{d ecrib a d c im d, t that, within the scope o being understood 1 f Whatv is claimed,"

roller' beingremoved, 1 r

Figure s a plan view,the roller being removed;

Figure 6 .1 a

sometimes come changes in the precise embodiment of the invention. shown can be made Without departing from the spirit of the invention;

In the. accompanying drawings the pre-' ferred form of theinvention has been shown.

In said drawings- Figurcl is a side elevation of that portion ofhois'ting' apparatus constituting the present invention and showing the yielding stop arms position. relative to a controlling lever. i 1

Figure 2 is anenlarged side elevation of one ofthe stop arms, parts beingshown in eq in- Q a a e Fignre 3 ,is a front elevation thereof, the

--]F igure 5 is aside elevation of a portion of hoisting mechanism" having the. present inventioiicombined therewith, the upper poi tion ofthe front lever being broken away to disclose the uppertportion of the rear or controllerlever; I side elevation of' another portion of said mechanism.

Figure 7 is a section on line 7 -7 ,.'Figure 1. Referring to the figures bycharacters of reference 15 designatespedestals or chairs onwhich a rod ltis mounted to slide, this rod beingconnccted to. across head- 13 mounted on and movable with arack bar 10 forming part of the hoistii'is' mechanism disclosed .in my application before .mentiono d Another rod 7 nected to thobar 10 and slidably engages the-lower end portion of: a controlling lever 26 which is cushioning springs31 and 32 on the rod at opposite sides of the lever but which-con stitute in themselves no part of the present invention. v -P1IIS 2O are-carried of the chairs or pedestals 15 and mounted on each of these pins is a-be ll crank lever ineluding a stop arm 21and a tripping arm 22.

A mun-.2315 carried by each tripping arm, this roller being mounted ,on a pin :52 which is slidahle within a. slot 53, formed in the tripping arm. A yoke 54: straddles the: army22 and.

threadedand is secured within an ear 58 extending'froin the arm 21,there being a nut 29 is 1 pivotally con.

the upper portions 7 i has a'steni 56 extending therefrom and :slidable w thin a, tubular guide 54 This gu de is exteriorly screw fulcrumedat 28, there being,

59 for locking the member in position. A spring 60 is mounted on the rod 56 and bears at one end against the yoke 54 and at its other end against the guide member 57.

As shown in Figure 1 one of the arms2l is disposed directly opposite the other and both arms have offset portions 24.- extending toward each other and terminating in heads Projections or buttons 17 are secured on the rods 14 and are adapted to work under the rollers 23.

The mechanism thus far described and which constitutes the" present invention is to be used in connection with hoisting mechanism such as shown generally in Figures 5 and 3 and more specifically set forth for example in my patents issued on June 13th, 1922, numbered 1,419,154: and 1,419,155. This hoisting mechanism includes broadly a drum 1 adapted'to transmit motion through a train of gears 2 to a shaft 3. Gears 4 and 5 transmit motion from this shaft to a shaft 6 on which is mounted a worm 9 designed to mesh with the rack bar 10 hereinbefore referred to. The lever 27 for controlling the motor M which actuates the drum 1 is connected to a controller G by means of a link 27'. The lever 26 which controls the brake is designed to operate suitable valve mechanism of an engine E, this engine and its valve mechanism constituting in itself no part of the present invention but "being utilized solely as a means whereby the lever 71 which is coupled through the rod72 and bell crank 73 with the brake bands or shoes 74 *ill be actuated to apply the brake when the lever 26 is brought to its neutral position.

During the operation of the hoisting mechanism the lever 26 is out of neutral position as shown in Figure l and the rod l-l is moved slowly in the direction indicated by the arrow, this movement being produced by the shifting of the rack 10 due to the rotation of the worm 9. The parts are so timed that when the cage approaches the landing the button 17 shown to the left in the illustration will come under the near roller 23 and thrust upwardly through the spring 60 against the ear 58, thereby causing the arm 21 to push against lever 26 and throw it to neutral position. As the mechanism indicated in Figure l is provided not only for the lever 26 but also for the lever 27 (the rods 29 and 14 for the two levers being shown in section in Figure 7) it will be apparent that lever 27 will at the same time be shifted so as to cut off the current to' the motor. In a short hoist the button l? is liable to stop directly under the roller 23 with the hoisting mechanism at a standstill. If at this time the cage should be slightly below the landing it would of course be necessary to momentarily operate the hoisting mechanism in order to raise the cage the necessary distance. To do this the -connected to each of the operator pulls 011 the upper end of lever 26 so as to force the lower end thereofagainst the head 25 engaging it. Thus the ear 58 will press downwardly on spring 60 and place the spring under movement of the lever being sutlicient to start the mechanism of the hoist and as soon as the cage has reached the exact level desired the lever'can be released and moved to neutral position. Thus it will be seen that by providin the improvement herein described there is no danger of the hoisting mechanism stopping and becoming locked before the cage reaches the exact level desired. In this connection it might be stated that a hoist of this character operates the cage at a speed of about 2,000 feet per minute and five seconds are allowed for bringing it to a stop, the cage slowing and stopping within sixty feet. As the loads on the cage vary from 3,500 pounds to 6,500 pounds and the momentum correspondingly varies, the hoist rarely if ever stops at the same point. By providing the mechanism herein described no difficulty will be experienced in bringing the cage to the proper level quickly and accurately after being brought to an automatic stop.

hat is claimed is 1. In hoisting mechanism the combina tion with a controlling lever, of tilt-able stop devices at opposite sides of the lever, slidable means for actuating either of the stop devices to shift the lever to neutral position and yielding means for holding the stop devices against movement.

2. In hoisting mechanism the combination with a controlling lever, of yieldable stop devices tiltably mounted and at opposite sides of the lever, and movable means for actuating either of the stop devices to shift the lever to its neutral position.

3. In hoisting mechanism the combination with a controlling lever, of opposed tiltable stop devices for actuation of the lever, a spring controlled roller movably stop devices, and movable means for engaging either roller to force either stop device against the controlling lever to move said lever to neutral position.

4-. In hoisting mechanism the combination with a controlling lever, of opposed stop devices tiltably mounted at opposite sides of the lever, each stop device including a bell crank, a stop head on one arm of the bell crank, a yoke slidably mounted on the other arm of the bell crank, yielding means for controlling the movement of the yoke relative to the bell crank, a roller movable with each yoke, and slidable means movable against the respective rollers'to actuate the respective stop devices and shift the lever to neutral position from either extreme position.

con'ipression, the

5. A mechanical automatic controlling the operator to retain sufiicient manual conmechanism for a power operated hoist introl to bring the hoist slowly to its final 1 5 eluding a power control means, a retarding terminus. means, and slidable hoist operated shifting 6. In hoist mechanism a controlling lever, Y

2 means, said slidable shifting means cooperyieldable stop devices at opposite sides ating, first, with the power control means of the lever, and means for actuating either to successively bring it to hoist stopping of the stop devices to shift the lever to its 20 position and to release it, and, second, with neutral position. v i

the hoist retarding means to gradually shift In testimony that I claim the foregoing it to position to bring the hoist to a gradual as my own, I'ha've hereto afiixed my signa and safe stop at a predetermined point ure- W short of its ultimate terminus, if not inter-, V Y fered with, and-yielding means to permit DANIEL LEPLEY.

Images