US927417A - Hoist. - Google Patents

Description

s. H. LIBBY.

HOIS'I APPLIOATIOH FILED MAY 6, 1907.

927,417. Patented July 6, 1909.

2 SHEETS-SHEET 2 Witnesses: Inventor":

Sam H.Libbg,

y 2 I s by 32m UNITED STATES P TENTor IoE.

SAM n. LIBBY, or else ORANGE-(NEW rnnsnnassronos T0 seam ELECTRIC COMPANY,

A CORPORATION OF NEW JERsEY.

HOIST.

, Specification of LettersPatent. Application filed May 6, 1907. Serial No. 871,968.

Patented July 6, 1909.

To all whom "it may concern:

Be it known that l, SAM'll. LIBBY', a cititicularly to motor-driven hoists, although it may be applied to power-driven hoists ofmany kinc s.

My invention is especially intended for use in hoists which serve to move material into and out of tanks containing baths with Whichthe material-is to be treated.

One of the objects of my invention is to provide automatic means whereby the hoist can be used to repeatedly dip the materialin the, bath so as "to thoroughly rinse the same.

Another object; of my invention is to provide means whereby the distance through which the hoist works between reversals may be adjusted. 1

Another object of my invention is to so arrange the reciprocating mechanism that it can be easily throwninto or out of operation without,in the latter condition, in any way interfering with. the ordinary operation of the hoist.

Referring to the drawing, .in which is shown one embodiment of my invention, Figure 1 illustrates in front elevation a hoist, to which my invention is applied; Fig. 2 is an elevation, similar to Fig. '1 Oman enlarged scale certain parts being shown in dotted lines, of a ortion of the dontrol mechanism 4 shown in l ig. 3; and Figl3 is a side elevation, partly in cross-section, of the hoist shown in Fig. 1 illustrating;especlally the controlhn mechanism 111 which my mven- -tion is em bodied. l a

Like parts throughout the several views are referred to by the same reference char acters.

In the drawings, 1 indicates acasing within which are housed many of the arts of the controlling mechanism of the hoist. Within a casing 1 is the motor by which the hoist is driven, the armature shaft of which carries a pinion 2 which engages with a gear 2 mounted on and secured to a countershaft 2 to which, is also secured a pinion (not shown) which en ages with another 1 gear 2 carried by anot .eri countershaft 2 the gear casing 1".

A limit mechanism 6 for automatica carr in a inion 2 en a in with a car 2, secui' ed to the cable (1151i? 3. The pir iion 2, gear 2 the pinion (not shownlon the coimtershaft 2 and the ear 2 arecovered by ithin the casing he a controller, of anysuitable "form, by which the direction of rotation of the motor and thereby the hoisting and lowering 1novements of the hoist are controlled. Within the casing 1, as shown in Fig. 3, is the hold 1 ing brake 5, which is released in a Well- 'known manner when the shaft of the controller 4 is in on osition and is applied when the controller in its off osition.

ly stoping. the .hoist at its extreme upper and ower positions is shown geared to thecontroller shaft b sprockets 6 and 6 and a chain 6, an id er6 being provided in order] to take the chain 6 out of the we of the shaft'13, hereinafter referred to. obs 6' are'shown rejecting from the casing 1 for adjusting t e limit device 6 which, as here shown, issiniilar to that illustrated irrthe patent to Darlington #808,273, dated December 26, 1905. The arts so far referred as to may be of any suit: le and well-known construction and since they formno part of l ly-invention need not be described in dea tall. The hoist may be hung from a frame 7, in a well-known manner, which. frame may carry. wheels which run on the I-beam 8. The current for the hoisting motor may be taken from the conductors 9 and 9* by. trolleys 9 and Win a well-known manner.

The shaft of the controller is'shown at 16, projecting from the casing 1. Fixed to the shaft 10 is the controller-lever 11 to the ends of which may be attached the ropes 12 for op crating the controller-inthe usual manner. The countershaft 2 for carrying the speed to reducing gears 2; and 2 between the motor and the hoistingdrum 3 is extended through the casing 1 and is shown at 13. This shaft is threaded as shown and has freely threaded thereon a pinion 15. This pinion has on 10o each face lugs 16' and 17 which, as the pinion moves back and forth, engage-respectively the stop 18 secured to the end of shaft 12.31 and the stop 19 adjus'tably secured by means of screws 20 to the shaft 13. A ear 21 is lot revolubly mounted on. theshaft 1 5 and on gages with the pinion 15. This gear has at- 'tachedto one face the, clutch member e a yielding connection between clutch mem-- ropes attached to the shaft 13 begins to rotate and the pinion which engages with a complementary clutch member 23 revoluble on, shaft 10, said clutch members being normally held out of engagement by a spring 24. coi ed about the shaft 10. Secured to the shaft 10 1s a cam member 25, of the form shown in Figs. 2 and 3, with which a pawl 26 engages, said pawl being held yieldingl by a spring 27. v The purpose of this )aw will be. hereinafter explanned. The cutch member 23 has proecting therefrom a lug30 which carries a pm 31, and the cam 25 has a lug 32 carrying the pin 33. A spring 34 losely coiled about the shaft has one of its ends extending on one side of the pins 31 and 33 and its other end extending onthe other side of said plus, as shown, .The spring 34 therefore, servesas ber 23 which is rotatable on the shaft 10 and the cam member which is fixed to the shaft 10,. On the outside of the. gear 21 a wheel 36 is rotatably mounted on. the shaft 10. This wheel has a hub 37 on which is a cam surface .which-is com lementary to a cam surface on the hub 38 of the'lever arm 11 which is keyedlto the shaft 10. By rotating the wheel 36, the hub 37 engages the hub 38 and forces the gear 21 and the clutch memher 22 to the left, as shown in} Fig. 3, thereby causing the two clutch members to engage. A rope 39 may be used on the wheel 36 to facilitate the rotation thereof, and this rope may be held in the groove of said wheel by a guard 40 carried by the bracket 41 in a wellknown manner The end of the shaft 10, as

shown in Fig. 3, may be hexagonal and has secured thereto an oil cup 42 which, through holes in the'shaft 10, serves to lubricate the various parts which rotate or slide thereon. The operation of my device is as follows: The wheel 36 being turned to force the clutchmembers into engagement and the controller shaft 10 having'beenturned to one of its operative positions by pulling one ofthe ever arm 11, the

15 moves along it in one direction or the other. Whenthis pinion 15 has moved sufiiciently so that one of its lugs 16 or 17 engages with one of the stops 18 or 19, the pinion turns with theshaft 13 and, meshing as it does with the gear 21, rotates that gear and through the clutch member 22 rotates the con'iplementary clutch member 23 which car ries the pin 31 This movement of the pin 31 places the spring 34 under a tension which is exerted'against the pin 33'carricd by the cam member 25. The cam member 25 is, however, held from rotation by the springpresscd. pawl 26 and does not rotate until the pin 31 has moved far enough to strike it which will occur, as is'obvious from'Fig. 2, after the clutch member-23 has made a little more than a quarter revolution. When the pin 31 strikes the cam member 25, the latter starts to rotate and under the influence of the spring-pressed pawl 26 snaps over from one extreme position to the other. The controller is thereby thrown from one extreme position to the other, the motor is reversed and the shaft 13 commences to rotate in the opposite direction, thereby starting the pinion 15 traveling in-a direction opposite to that in which it previously moved until it is engaged b the other stop 18 or 19. The gear 21 wil then be rotated in the opposite direction, and through the clutch members, the spring 34 and the cam- 25 will turn the controller back to its first position. This operation will obviously be repeated as long as the wheel 36 is allowed to hold the clutch closed.

By the mechanism abovedescribed, it is obvious that the hoist may either be used in the ordinary way under the control of the operator through the ropes attached to the lever 11, or it may at any position be used to automatically and repeatedly raise and lower the load through a certain definite distance. This distance, as before explained, may be changed by adjusting the position of the stop 19.

While I have shown but one form of'my invention, I wish it distinctly understoodthat I realize that the construction illustrated may be varied in many ways without departing from the spirit of my invention. It IS my intention to cover all such modifications in the follmving'claims.

W hat I claim as new and desire to secure by Letters Patent of the United States, is',

1. In a hoist, a hoisting mechanism, a controller, a reversing mechanism driven from the hoisting mechanism for automatically and repeatedly throwing the controller from its hoisting to its lowering position and vice versa, means for adjusting the distance through which the hoist works between reversals, and means for throwing said reversing mechanism into and out of operation;

2. In a l1.oist,\a hoisting mechanism, a controller, a reversing mechanism comprising an auxiliary shaft driven from the hoisting mechanism, driving mechanism connecting said controller and said auxiliary shaft, and means on said auxiliary shaft for intermittently rendering said driving mechanism optroller, a reversing mechanism comprising an auxiliary shaft driven from the hoisting mechanism, driving mechanism connecting said controller and said auxiliary shaft, means on said auxiliary shaft for intermittently rendering said driving mechanism operative whereby the controller is automatically and repeatedly thrown from its hoisting to its lowering position and vice versa, and

- troller thereforhaving an operating shaft, a

reversing mechanism com rising an auxiliary shaft driven from the oisting mechan ism, driving mechanism connecting said controller shaft and said auxiliary shaft, means on said auxiliary shaft for intermittently rendering said driving mechanism operative whereby the controller shaft is automatically 1 and repeatedly thrown fromits hoisting to its lowering position and vice versa, and a clutch on said controller shaft forthrowing said reversing mechanism into and out of operation.

5. In ahoist, ahoisting mechanism, a con an operating shaft and means for operating it, ofa reversing mechanism com rising an auxiliary shaft driven from the oisting mechanism, a pin' ion threaded for rotation on said auxiliary shaft, stops fixed to said auxiliary shaft on each side of said pinion, lugs on said inion arranged to engage said stops, a-gear ree to rotate on said controller shaft and engaging said pinion, a clutch member secured to said gear, a complementary clutch member operatively connected to said shaft, and means for causing said clutch members to engage and disen age.

6. In a 01st, a hoisting mechanism, a controller therefor having an operating shaft and means for operating it, of a reversing mechanism com rising an auxiliary shaft driven from the oisting mechanism, a pinion threaded for movement along said auxiliary shaft, adjustable stops'fixed to said auxiliary shaft oneachside of said pinion, lugs on said pinion arranged to engage said stops, a gear free to rotate on said controller shaft and engaging said pinion, a clutch member yielding connection, and means for causing secured to-said gear, a com lementary clutch member connected to sai shaft through a.

said clutch inembersto gage. I v

7 In a hoist, a hoisting mechanism, a 'controller therefor having an operating shaft and means for operating it, ofa reversin engage and 'disem mechanism com rising an auxiliary sh-a t' driven from the oisting mechanismfapinionthreaded for movement along said auxiliary shaft, stops fixed to said auxiliary shaft on each side of said pinion and arranged to engage therewith, a gear free to rotate on. said controller shaft and engagingsaidpim ion, a clutch member movable with said gear, a com lementary clutchmember rotatable.

on sai controller shafti a cam secured to the said cam, a spring connection between sai complementary clutch member and said cam, and means for causing said vclutch mem- Y 8. In a hoist, a hoisting mechanism, a con-s ionlthreaded for movement along said auxiliary shaft, sto s fixed to said auxiliar shaft on each side of said-pinion and adapted to en gage therewith as the pinion moves along the shaft, a gear free to rotate on said controller 60 controller shaft, a paw yieldingly engaging shaft and free to slide thereon a limited] amount, a clutch member moving with said gear, a complementary clutch member connected to said shaft through a yielding con nection, a cam rotatable on said controller shaft, and a secondcam with which said first-mentioned cam coacts to close and open said clutch In witness whereof, I have hereunto set my hand this thirtieth day of April, I907.

SAM H. LIBBY.

Witnesses:

Roenn H; Bn'r'rnnwon'rn ANNA MAY GILLIN.

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