US1443728A - Brake - Google Patents

Description

`o. L. COFFEY.

BRAKE.

FILED DEC.22. 1920.

Jan. 30, 1923.

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BRAKE.

FILED DEC. 22, 1920. 2 SHEETS-SHEET 2 i Il@- @www scafjf latenied dan. Ell, lignei..

UN'F 'Sillfllllgi OSCAR L. COFFEY, OF HARVEY, ILLINOIS,

ASSIGNOR TO HITING CORPORATION, OF

HARVEY, ILLINOIS, 1 CORPORATION GF IICLIDTOIS;y

BRAKE.

Application filed December To all whom t may concern.'

Be it knovvn that I, @scan L. Correr, a citizen yot the United States, residing at Harvey, in the county ot Cook and State oij Illinois, have invented a certain neiv; and useful improvement in Brakes, oiib which the Jfollowing is a specii'ication.

This invention relates to brakes, however rpplied to the object, to be slowed dovvnor stopped. The particular object ot the 1nvention is to provide a brake mechanism particularly one of the normally open type for use in connection with the pov/'er devices of traveling cranes, in nio'dernfcon struction electric cranes, which is ot such a character that it can bereadily adjusted to varying sizes of cranes and varying pouver mechanism equipments on the same crane, in such a Way that the crane operator, in the' cage provided for him, and in the position therein determined by other apparatus than the brake mechanism, can readily and conveniently operate the brake mechanism.

The invention consists in mechanism for carrying out the foregoing' objects Which'can be easily and comparatively cheaplyniade, which is satisfactory in use and is no-t readily liable to get out of order. More particularly the invent-ion consists in many special features fully set forth in the specification and claims,

Referring to the drawings in which like numerals designate the samehpart thruout the severa-l vieivsz- Figure l is a side view of one portion oli' the crane, having the mechanism ot' this invention applied thereto. i

Figure 2 is a sectional detail view taken on approximately the line Z--Q ot Figure l.

Figure i is a detail plan view on the l ine Figure -ii is a plan view ot the essential lu-ake mechanism removed trom otherl parts of the device.

Figure 5 is a` face vievv, partially in sec? tion, of mechanism of Figure 4.

Figure 6 is an alternative construction from that of Figure 4f, showing the operatino' lever reversed in assembling the device and the resulting corresponding` changing parts. l

Figure T is a perspective view ot the lett hand 'vertical member ot Figures l and 5, viewed in approximately the direction ol" the arrow 'i' ot Figure l.

22, 1920. Serial No. 432,385.

Figure l shows one conventional form of traveling crane l0, having the usual flanged upper edge l2 and lower edge l4,`the same carrying in the usual manner 'upright post lli supporting a railing i8 in conventional construction. From the right hand end ot the crane girder andl attached parts is suspended the operators cage 20 having working floor 29- on which he stands and moves about in the ordinary manner. v The crane itself is carried on Wheels 24C which travel on a conventional track 26 on conventionalside Wall supports. The Wheels 24 are conven` tionally driven by a shaft 30, suitably journailed at points 32 along the crane, and re ceiving power thru conventional gearing 234-36 in operative relation with an electric motor 38 having a central 'operating shaft e0. Electric current is supplied by any suitable means not shown thru the motor 38 to cause it to rotate in conventional manner tovdrive the shatt 30 and vconsequently the n Wheels 24 to cause the crane to move along the track 2G.

rlhe problem to be solved by this invention 'is to provide brake mechanism, paricularly ofthe open type liter ready application to the shalt 30 or the shaft 40 and particularly to shaft l0, regardless ot dit terences which mayarise in constructing different cranes, in the position of the shaft l() with reference to the shaft 30 and' to other parts of the crane mechanism describec.

The particular term of brake mechanism which accomplishes the desired result is shown in its preferred form in Figures sito I inclusive. .A base plate is provided, adapted tor suitable placement yon the same platform all oi the crane which carries the motor 38, in suitablerelation to the shaft all as illustrated in Figure 5. Shaft Ll0 carries above this platform a conventional forni Oli brake Wheel loi @n each side ot the brake Wheel i6 are brake shoes 48, each pivoted at 50 to a vertically rockable member 52', or 5l, as the casemay be, which are in turn suitably pivoted to the base l2 on pivot pins. carried in lugs 58 rising from the base. ln order to keep the brake shoes trom dragging at their tops on brake'ivheel 46 each shoe is supported at its lower end by an adjustable screw GOwentering the adjacent sup,- porting member 52 or 54 as the case may be. These last mentioned supports are adnstable the brake wheel and in the opposite movement the pressure on the spring 72 is released to allow it to therefore force members 52 to 54C apart and thus release the brake.

Especial attention is called to the particular mounting of the lever and the power result of the same when it operated by pressure on foot lever 1111. When the operator presses downward on lever 1111 he causes lever 106 to move in a counter clockwise direction about pivot 102. In the initial part of this movement the elfective power acting to produce this rotation'is the horizontal distance between the pivot 102 and the central axis of rod 106 as shown in Figure .1. As movement. of rod 106 continues upward its pivot end 104 moves te the right in a count-er clockwise direction about pivot 102 with the result that the effective lever arm becomes greater' as the pivot 10a4 swings upward, becoming greatest when pivots 102 and 101 are in the same horizontal line. Conversely, in the position sho-wn in the drawing, the lever arm elfective between pivots 102 and pivots 9S to pull rod 94 is the distance between them, while as lever 100v moves in a counter clockwise direction and the pivot 98 swings upward, the effective lerer arm about pivot 102 tending to cause pull to the right on rod 94: becomes less, decreasing until the free end of rod 9st swings up practically into Contact with pivot 102. It, therefore, follows that this construction produces a very powerful result in that the effective powerof rod 106 to pull rod 94: progressively increases as it moves upward.

lVhile the devices described is applied especially to traveling` cranes, it may be applied anywherel where its use would be de'- sirable and without departing from the invention.

Having thus described my invention what I claim as new and desire to secure by Letters Patent is 1. In mechanism of the class described, a rotatable brake wheel, a base adjacent to said brake wheel, members pivoted to the base, adapted to swing toward and from the brake wheel on opposite sides thereof, means training to hold said movable members apart and away from the brake wheel and a. pivoted lever mechanism for moving said movable members toward the brake wheel, and means permitting shi ting said lever mechanism along its own aXis of rotation.

2. In mechanism of the class described, a brake wheel, pivotally mounted lever on opposite sides of thebralre wheel, carr` ing brake shoes adapted to enga-ge the wheel, a rod connected to one lever arm and passing thru a selected one of openings provided for it in the other arm, means carried by the rod tending to move the lever arms with reference to the wheel anda lever engaging said rod and selectively pivotable to the adjacent perforated lever arm in dif.

ferent positions, depending upon which' the rod zgoes thru,- Vwhereby when the last mentioned lever is opening' in that arm manipulated the first mentioned lever arms are moved against the action of the spring regardless of in which particular perfora-` arm, the rod may be in- -tionable in twz'rdillerent positions on the first lever corresponc'ling to said perforations iu the lever, operative in each position to inaf nipulate the rod .in thc corresponding perforation in the lever. i

11. In mechanism of the class described, a brake lever member, a shaft pivotally mounted on and wholly carried by the brake levermember, a rod extending from and reciprocatable with reference to the brake lever member, a lever carried by said shaft and engaging said rod to reciprocate it, and means for rocking the shaft for the purposes set forth.

5. In mechanism of the class described,` a brake lever member, a shaft pivotally mounted on and carried by the brake lever member, a rod reciprocatable with reference to the brake lever member and a lever car-` ried by said shaft and engaging said rod to reciprocate it, means for rocking the shaft for the purposes set forth, means for selectively bodily positioning said shaft in two different positionson opposite sides of the rod, and means enabling the shaft, in either of its positions, to operate the rod.

6. In mechanism of the class described, a brake lever member, a rod reciprocatable at an angle thereto, a selec-tively mountable in two dierent spaced apart openings in the bralre lever member, a shaft pivotable to the bralie lever member in two different sets of bearings provided for it, one adjacent to each opening thru which the rod may enter and a lever connecting' between the shaft and rod, operatable in each alternativeposition of the shaft in one of its sets of openings and the rod. in a corresponding one of its set of openings.

7. In mechanism of the class described, a brake lever member, a shaft running in general parallel to the length of the lever, pivoted thereto, mechanism connected to the brake lever ember, operated by rocking of said shaft and an operating lever selectively positiona`l lealong the shaft erate in any set forth.

8. In mechanism of the class brake lever member,

of its positions, for the purposes described, a

adaptedk t0 Op'-k a shaft running in genioo eral parallel to the lengt-l1 of the lever, pvot- In Witness Whefeol, l have hereunto Suhecl thel'eoneclmnlsm connected to the blule scribed my 1mm@ u1 the prsfence of two wit lever maflber, operated by locllng ol Saud nsses.

Shaft nml im opea-ting lever selectively OSCAR L. COFFEY. splmed along' lh@ shaft adapted to operate TWrnesses: m any 0l iis posnlons-`rl 'for the purposes Set .TGHN S. TOWNSEND,

forth. PAUL V. BIELFELDT.

Certificate of Correction.

It is hereby certified that in Letters Patent No. 1,443,728, granted January 30, 1923, upon the application of Oscar L. Coffey, of Harvey, Illinois, for an improvement in Brakes, an error appears in the printed specification requiring correction as follows: Page 3, line 109, claim 6, strike out the article a; and that the said Letters Patent should be read With this correction therein that the same may conform to the record of the case in the Patent Oice.

Signed and sealed this 27th day of February, A. D., 1923.

[SEAL] KARL FENNING,

Acting Uomonssz'oner of Patents.

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