US1577029A - Hoisting mechanism - Google Patents

Description

March 16 1926.

" his Attorney.

Patented Mar. 16, 192.6.

UNITEn s-'ra'rss JOHN T. HORTON, or BROOKLYN, Nnw YORK.

HOIS'lINCr MECHANISM.

Application filed November 2, 1923. Serial No. 672,328.

To all 'whom t may/concern.'

Be it known that I, JOHN T. HoR'roN, a citizen of the United States, and a resident of New York, borough of Brooklyn, in the county of Kings and State of New York, have invented certain new and useful Improvenients in Hoisting Mechanisms, of which the following is a specification.

This invention relates to hoisting Vmecha'- nisms, and has for its object to provide a mechanism ofthe class specified, simple in control and eficient in operation. Other features yof improvement will appear later herein.

With these ends in view my improvements comprise features illustrated in their preferred embodiment in the drawings accompanying this specification, wherein Figure 1 is a side elevation of my improved mechanism. Fig. 2 is a front elevation looking from the left of Fig. 1. Fig. 3 is a fragmentary sectional view on line 33 Iof Fig. 1. All the figures of the drawing are to one scale.

`The mechanism is directed to the oper ation and control of two winding ydrums 2, 4V

and is preferably carried by two upright Vmembers 5, 6, such as steel channels. Said drums may be connected by cables, wound about said drums, to any desired type of hoisting apparatus, such for instance 'as a boom derrick. In this case the cable from one drum would be attached to'said boom fory raising and lowering thereof 'and the other cable would be rove through the free end of the boom, terminating'in a hook or the like, for hoisting. Such types of boom derrick yare well knownA and the details thereofare omitted herein as not pertinent to the present invention. Channels 5, 6 may be tied together by'cross members 7, 8,4 9 and 10, respectively, and electric ldriving motor 1 1 may be mounted on cross members 9, 10 near the base of the mechanism. Said motor 11 preferably has two pinions 12, 13

fixed to its shaft 14. Said pinions are of different sizes and are adapted for engagement, one at a time, with gears 15, 16, respectively, fixed to sleeve 17 slidably mounted on intermediate shaft 18. Rotary mot-ion is transmitted from either of gears 15, 16 to shaft 18 through key 19. By this well known arrangement either of two speeds may be transmitted to shaft 18 from a constant speed of motor 11.

Gears 15, 16 maybe shifted along shaft 18 into engagement with their respective pinions 12, 13 by means of lever 27 pivoted to a bracket xed to cross member 9. Saidlever 27 has yoke 28 thereof in engagement with and between flanges 29, of sleeve 17. Shaft 18` and other shafts which will presently be described have their bearings in opposite skeleton frames 20, 21..bolted to uprights 5, 6, respectively. Pinion 22 is fixed to shaft 18 outboard frame 20, and meshes with gear 23'fixed to control-shaft 24. Turning freely on said control-shaft and near opposite ends thereof, within frames 20, 21, are pinions 25, 26. Pinion 25 meshes with large gear 31 fixed to drum 4, and pinion 26 meshes with large gear 32 fixed to drum 2. Control-shaft 24, and drum shafts 33, 34have their bearings in said frames 20, 21. Inwardly facing from ` pinions 25, 26 andintegral therewith, respectively, aredished friction members 35, 36 for engagement with opposite male friction members 37, .38, respectively. Said male members 37, 38 are mounted coaxiallywith members 35, 36on control-shaft 24 andare slidable lengthwise said shaft but arev constrained tok rotate therewith by keys 39, 40, respectively.

Fixed to cross member 8 and encircling shaft 24, midway between ` frames 20, 21, is center bearing 41. Said bearing has opposite cams or wedges 42, 43 for engagement with complementary cams 44, 45, respectively, mounted for rotation and endwise movement on said shaft 24. Said cams 44, 45 are provided with arms 46, 47, respectively, whereby said cams may be rotated through a small arc in engagement with their respective cam faces of bearing 41 for thrusting maleffrictionfmembers 37, 38 into-.engagement with their respective dished friction members35, 36 of pinions 25, 26` for transmitting rotary motion from shaft 24 to said pinions. f 5 v Cam 44 may be oscillated by means of lever 48 fixed to shaft 49 `having bearings inframe 21 and brackets 54, 55 by the following means: Said shaft 49 has arm 50 fixed thereto and the free end of said arm is connected with the free end of cam arm 46 by links 51, 51, so that, when lever 48 is pulled to the left, Fig. 1, cam 44 is rotated in clockwise direction whereby friction member 37 is forced to the left, Figs. 2 and 3, into engagement with friction member 35 thereby transmitting rotary motion from shaft 2a to pinion 25 and thence to drum gear 3l.

Cam is similarly oscillated from lever 52, fixed to tubular shaft 58 about shaft 49, through arm 56 fixed to said tubular shaft and connected by links 57, 5T with cam arm 17. By this arrangement, controlled by levers 4-8, 52, drums and si may be rotated one at a time from motor il, or simultaneously and at varying speeds as desired, governed by the amount of friction applied to said friction members..

The lowering action resulting` from the pull of the cables in univinding from drums 2, 4, is governed by foot levers 5S, 59, re-

spectively Said lovers turn freely on shaft fixed in bracket ($1 secured to upright (i. Lever 59 is connected by links (i2, 62 with the free end of arm (38 fined to rock shaft Get.,` Said rock shaft has bearings in frame 21 and' brackets 511i, 55. Dished friction member' 35 has wrapped about its periphery band brake (55 connected in the usual manner at one end with cross member 9 fixed to upriglits 5 and (i, and the other end to arm 67 fixed to rock shaft Gl. Dishedl friction member 36 has band brake G8 wrapped thereabout. One endl of said band brake is fixedto cross member 9 and the other end to arm 69 fixed to tubular shaft 70 about rock shaft 64a Anothe'` arm 7l fixed to tubular shaft T0 is connected by links 72, 72 with foot lever 58; By depressing the left hand end of lever 59, Fig. 1, band brake is caused to grip member 35 and retard its rotation. Lever 58 similarly depressed will cause band brake GS to grip member 36 and similarly retard its rotation. Said band brakes may be operated independently, one at a time, or siniultaneously and to such ex,- tent of result as desired.

There is thus provided a hoisting 1nechanism driven from one motor and controlled for various speeds of hoisting and lowering by means of four levers, all operable by one man.

I1 claim:

1L In a hoisting mechanism the combination of a oontrolsshaft, opposite pinions mounted for free rotation on said shaft, an infacing friction member carried by each pinion, opposite friction members slidably mounted on said shaft for engagement with said pinion friction members respectively, said slidable friction members being conr strained for rotation Withfsaid shaft, a fixed double faced cam about said shaft between said slidable friction members, a cam mounted for oscillation on said shaft and for engagement with said fixed cam between each of said slidable friction members and said fixed cam,1 a rock shaft having a lever fixed thereto, means operably connecting said rock shaft and one of said oscillat-able cams, a tubular rock shaft about said rock shaft and having a lever fixed thereto, means operably connecting said tubular rock shaft with the other oscillatable cam, said levers being operable simultaneously or independently at will, a motor mounted on` said mechanism, and means for rotating saidi controlshaft at either of a plurality of speeds from said motor.

2. In a hoisting mechanismy the combina tion of a control-slmft,n opposite pinions mounted for 'Free rotation on said shaft, a 'friction member carried by each pinion,` op posits friction nfiembers slidably mounted on said shaft for engagement. with said pinion friction members respectively,` said` slidablo friction members being constrained for. rotation with said shaft, a fixed. double faced cant contiguous to said shaft betiveen said slidable friction members, al cam mounted for oscillation on said shaft and for engagement with said fixed cam between each of said slidable members and said fixedaeam, a rock shaft having a. lever fixed thereto, means operably connecting said rock shaft and one of said oscillatable cams, a tubular rock shaft about said rock shaft and having a lever fixed thereto, means operably connecting said tubular rock shaft with the other oscillatable cam, a,` brake operably connectedivith each of said pinionsa second rock` shaft having a lever fixed thereto, means operably connecting; said rock shaft and one of` said brakes,` a tubular rock shaft about .said second rock shaft and having a lever fixed thereto, andmeans operably connecting said second tubular rock shaft With the other of said brakes, said levers being operable simultaneously7 or independently at Will for oscillating said rock shafts.

In Witness whereof, Ihereby affix my signature this Ist day of November, 1923.

JOHN T; HOR'ION.

Images