US1646676A - Grip ratchet - Google Patents

Description

pct. 25', 1927.

w. l.. ATKINSON Patented oa. .25. 19.27.

f 1 UNITED srps WILLIAM I.. ATKINSON, or nniaoivns, wasrrineront GRIP RA'rcHEr.

Y applicati@ iediiovember 22.192,6.- serial No. 150,125.v

rlhisV invention vrelatesto a grippingdef I vice and aims to provide nov-el means' where-y by the shaft with which the gripping device s is-'employed may be readily retarded in its movement, ratcheted or stopped'atftheuwill of the operator. Y v .y p

m'portant obj ect of the invention 1S to shoes thereof will be levenly applied throughout the circumference of the drum, thereby reducing strain on the machinery vwith which the device is used, to the minil qualities.r n

the foregoing and other vobjects in Another object of the invention is to provide means whereby the shoe which is sectional in formation may be adjusted when.

t-he ysame becomes wornrto lose its gripping lVith n i n view which will appear as the description proceeds, the invention resides in the com- `binationzand arrangement of parts and in the details of construction hereinafter described and claimed, it being understood that changes in the precise embodimentpof the invention herein disclosed, may be made within the-scope of what is claimed, without departing from the spirit of the invention.

.u an.

' Figure 2.-

shaft forms a part of machinery not shown. The reference character 6 indicates a brake drum which is Secured to the Yshaft by means of the pin 7 that tits in the opening of thev hub of the drum, as clearly shown by The periphery' 0f the. drum Whichig indi. cated at 8 is substantially V-shaped toaccommodate the inclined surfaces 9 of the l' sectional grip shoe embodying sectionsy 10, 11 and 12, the grip shoes being pivotally con- Y' iiected by means of the pins 13.

The section 12.0f the shoe is provided with spaced extensions14 that are providedwith openings to receive the bolt 14- which provides a pivot for the curved supporting member 15 of the grip actuating-mechanism.

-This curved supporting member `15 is provided witha right angled extremity 16 provide Aa gripping device 'wherein the gripl vlever may swing on the shaft.

\ pivot for the link.

fof m'l with 'thredadererles tofreiveth adJustingboltS ,17 which engagejthe slioulfl der 13 of grip section 10 aselearlyshown by Eem-e; v1- sfo-111211.rheshotmay bie fadjustedfwitlirespe'ct tolits drum.

Bolts ltlextend laterally from thesectionsl 1'@ 1() a-nd12f andaredisposed directly in line` withA each 'other wliere they sup'port the coiled spring 20 that hasfitsl ends yconnected with thefbolts so that the sections of the shoe are normally held in position to be readily operated, and to insure against losty n Y,

motion at the time of operating the grip.

Associated with the lcurved supporting meinberl is an operating lever 21 that has voneend thereof bifurcated and formed with the Y openingsto receive the shaft 5 so i that A link 22 has pivotal connection lwith one end of the curved supporting lmember 15 Cil and has pivotal `connection with the lever 21 by means ofthe extension 23 forming-a `part through the extension 23 and through the bifurcated portionof thelever k21 acting as a of the linkv22, the bolt 24 which'passesi Y Bolt 2'5vconnects the linli` totliecurved l supporting member 15 to permit of pivotal vmovement of the link with respect to the member 15. From the foregoing itv will be obvious that should it be desired to apply the grip, it is only necessary tofoperatethe le'- `ver to cause the curved supportingmember i 15 to rock, exerting a pressure on the sec; tional grip-shoe to move the sections of the grip shoe into gripping relationwith the drum 6. f

Iclaim:-" 1. In a device of the character described, a drum, a shaft on which the drum is Vsecured, a shoe including a. plurality of pivotally connected sections', one of-the sections having a pair of curved extensions, a sup porting member positioned `between' the vcurvedextensions and pivotally connected therewith, adgusting kscrews carried by the' supportingmember, a shoulder vcarried by one Vof the sections'r and engagedv by the screws, said screws adapted to move the shoe'` with respect to the'drum to adjust it, and a" lever'for operating the shoe. i 2.'.Ina device of the character described, a gripdrum,a shaft on which the drumA is secured, a grip shoe 4,including a plurality of pivotally c onnectedvsections, a curved member having pivotal connection'with one of y the sections and having a right angled end portion, adjusting screws extending through the right angled end portion and engaging one of the shoe sections to adjust the, shoe With respect to the drum, and means for operating the shoe.

3. In a device of the characterl described, a

drum,k a curved supporting *member posil connecting thelever to the Vsupporting member'so that movement of the lever Will move Y the drum. Y Y Y In testimony that I claim theforegoing as the supportingrmember to cause the shoe toA grip the drum.

4L. In a device of the character described,

a drum, a shaft on which the drum is mountf ed, a curvedv supporting member, a lever rmounted on the shaft, m-eans for pivotally connecting the supporting member to the lever, a. sectional shoev .having one of its ends pivotally connected with the support-ing member,- means for vadjusting-the opposite end ofthe shoevvith respect to the drum, and

coiledsprings carried bythe shoe for nor-L 'mally urging the shoe into engagement with my own,I'have hereto aixed my signature.

IVILLIAM ATKINSON.

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