US812827A - Brake-band. - Google Patents

Description

PATENTBD PEB. 2o, 1906.

- H. N. GOVELL.

BRAKE BAND.

APPLIGATIoN FILED JULY 2z. 1904.

i /KWj/ (EN lm/en or .by

Winsses:

UNiTED STATES PATENT-onirica.

HARRY N. oovELL, F -NEW YORK, N.. Y., AssIGNoR To Lioeanwooo MANUFAoTUniNG COMPANY, A ooRPoRA'rIoNoF .NEW YORK.A

BRAKE-BAND.

To alll'whomit may concern:

`Be itknown that I, HARRY N. CovELL, a'

.- vcitizen of the United States, and a resident Hereto ,ore it has been the iractice in set-I ting thelfrictionmembers in riving contact to employ a hand-wheelfconstructed with aratc et and pawl, the awl'usually being operated by 'a' s ring. Il? has been found, however,` with .t 's ratchet-and-pawl constructionthat the Lal of the hoisting-engine wassogreatthat t e awlwould be thrown outoffpl'a'e and the settingthe rope-drum which was operated by said p'awlwould not hold in the position to which 'it was set. It is one of theobjects of myinvention to remedy this defect.

Reference being had to the drawings, Figurb 1 is a' sectional elevation of a rope-drum withjmy invention' applied thereto. Fi 2 is an end view, partly 1n section, of a w ieel embodying my invention.

The followinfr is a description of the brake- A band and whee shown in the accompan ing drawings, which illustrate the form in w ich I at resent prefer to embody my invention. It w11 be understood, however, that various modifications and changes may be made. in the details of the same without departing fromV my invention and without exceeding the scope of the concluding claims. I have .shown the brake-band applied to a handwheel, but do not wish to limit myself to this oierating means, as others may be employe 1 and 2 are stationary end frames carrying bushings 3 and 4, in which the shaft 5 is journaled. The shaft 5 is held against longitiidinalanovement b flanges on the interior of the bushing 4, these iianges projecting into thc grooves 6 and 7 of the shaft, and also by the shoulder 8 of the shaft bearing against the face of the frame 2, the collar 9 fixed to the end of the shaft and which bears against Specification of Letters Patent.

Application tiled July 22. 1904. Serial No 217.651.

ctiori-screw used for Patented Feb. 20, 1906.

1() of the shaft between the face of frame 1 and clutch member 11. The clutch member 11 is fixedly secured Interposed between the fixed clutch member 11 and the' drum 13 and tending to hold the opposite f ace of frame 2, and the shoulder to the shaft 5| and has fastened to 'it the fricthe drum disengaged from the fixed member when not acted upon by the mechanism used for applying the friction is the spring 15.

16 is a cross-key interposed between the drum 13 and the shoulder 8 of the shaft. 17

is a pin Awhich abuts against said cross-key l and extends through an openingat the center of the shaft, projectin'gfroni one endthereof in' position to be operated by the screw 18,

threaded in the nut 19, fixed to frame 2.

To take care of friction upon the thrustpin 17, I employ a lubricating-box similar to that described in l 541,308, for containing a lubricant to immcrse'the beari rig-sin'facc between the thrust pin 17 and the screw 18. The friction-screw -18 isoperated bymeans of the hand-wheel or4 other means 21, ailixed thereto. Cast on said wheel is a flange 22, u on whi'chis placed Aa brake-band 23, preferab y of steel,

24 24 are sup orting-arms which are suitably secured to t e frame 2. `Thesearms extend downward and at their lower ends are made fast to the pin or bolt 25, which is secured to the frame 2. Fulcrumed to the pin 25 is the bell-cranklever 26. One arm 27 of this lever has secured to it the end of the brake-band 23. The other arm 29,y which forms a treadle with a foot-piece 34, has a projection thereon, to which is screwthreaded and secured, by means of the nut 31, the end 32 of the brake-band. This end, 32

passes through an openin 33 iii-the end 28 of ,the brake-band. A brac et 35, which is part of the support 24, has adjustably secured to it the s )ring 36, which is attached to the end 29 of t e lever. This spring tends to hold the lever in anu ri ht' osition and thereby prevents the bra ean froms 'ppn' The operation of the device is as ollows:

patent rto Beelnnan, No. f

Wah the wheel ana brak@ in the position shown by the drawings the wheel may be turned in one direction, in the present iustance clockwise. This turning willcause the screw 18 to operate, which in turn will opcrate upon the pm 17. This pin being acted upon will bear afvainst the key 16, which- Y bears against the drum 13 and will push said drum againstthe spring 15 until the groove ro of the flange 1`4 frictionally engages with the ring l2 and clutches the same. -By this means the-drum may be setto thc desired position and will remain in that position, the brake-band preventingr the whc'cl from turni 5 ing backward and releasing the friction-serew and the mechanism which o )crates to set the drum. When it is desire( to release. the chtch mechanism, it may be. donc by operating the treadle. 'Bearing down on this trea- 2o die will cause the arm 7 and th'e end 2S of the Ibrake-bami to rise. At the same time the other arm 29 and the end 32 of the brake will be lowered and the brake-band will release its hold on the wheel, permitting it vto be turned z 5 backward, and thus bringing the drnm out of its frictional eneagement with the ring 12.

HavingI thus Idescribed my invention, what I claim, and de'sire to secure'by Letters Patent,'is ,j l 'y A1. The combination -with friction 'clutch members of a device for setting said members in driving contact and mea-iis inde )endent of the setting mechanism automatically operating to retain said device and clutch members in driving contact.

2. 'lhe `combination with friction clutch members of a'devirw for settingsaid members in driving contact, means independent of the settingr mechanism automatically operating 4o to hold said device and clutch members in set position, and lmeans wbercb)r said device.

may be released to permit. the unscttinfbr olsaid clutch members. s

3.- The combination with friction clutch members of a device for setting said members in riving contact, and a brake-band on. normally holding said vdevice from'bac whereby said devieeiis tree to turn in one di# rcction and held from turning in the opposite direction. Y. f i- 4. In combination with friction' clutch "5o members, a. wheel for setting said members v in driving contact, a brake-band thereon per` mitting the turning of -said wheel to set said members and automatically.operating torestrain said wheel from turning in the reverse 555 direction. l 'i 5. The combination with friction clutch members, of a device free to turn to Set said members in driving'contact, a brake-band whcrebv said device is restrained from turn- 6o ing in the reverse direction and means whereby said ln'ake.-baml may release said device to turn in the opposite direction.

6. The con'ibination with friction clutch members of a device for setting said members in driving contact, a brake-band thereon normally holdine said members in set position a nd means whereby said brake-band may r elease said device and permit the unsetti'ng'of said members. V7.

7. The combination with friction clutch l members, of a device for setting said mem.- bers in drivingv contact, a brake-band' ther ward turning, and a treadle for releasing said 75,l a brake-band'thereby permitting theturmii' of said device in reverse direction.

S. The:combination with 'friction"'elilfcln members. lof a device for setting said mem' g. bers in driving contact, and a brake-ba thereon ,the ends 'of said brake-band being ai, tacbed to a lever, said brake-band nbrt'nallg holding said device in set position leased Irv/action upon said leve./., f ln testimon)Y whereof I have signdmy name to this spceilic'ation in thepreisencoio" two subscribing witnesses.

Witnesses:

M. F. Woon, E. BLUM'.

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