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Publication numberUS1286360 A
Publication typeGrant
Publication dateDec 3, 1918
Filing dateJan 2, 1918
Priority dateJan 2, 1918
Publication numberUS 1286360 A, US 1286360A, US-A-1286360, US1286360 A, US1286360A
InventorsGeorge O Leopold
Original AssigneeNorth Bros Mfg Co
Export CitationBiBTeX, EndNote, RefMan
External Links: USPTO, USPTO Assignment, Espacenet
Ratchet mechanism.
US 1286360 A
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Description  (OCR text may contain errors)



1,286,36U- Patented Dec. 3, 1918.

i 1, i fg.


\ Be it knownthatl, GEORGE `Grenen o. LEeicLn,` or rnrtanntrnrn, r

EnEsYLvAnIA, Assiettes roivonrn BEos More e0., OFUEHILADELPnrA, .rnnnsrnvnivrm A conroianrronion rENNsYL VANIA. y.


To all whom it may concern:

. which a shaft is to be turned in either direction by reciprocating an arm. y y ,y The object of my` inventionisto makegthe ratchet mechanism so that the pawl can be shifted to either of its twopositions and" can be frictionally held in either position.

The invention also relates to `meansfor 4 withdrawing the pawl and holding itout of `Contact. with the ratchet wheel while 1it `is being reversed. y .t i,

In the accompanying drawings: ,y Figure 1 is a plan view showing my `nnproved ratchet mechanism gf y i Fig. 2 is a plan view partly in section Fig. 3 is a longitudinalsectional )view on `the line 3 3, Fig. 1;

Fig. 4 is a transverse vsectionalvimon"the line 4 4, Fig. 3;

Fig.5 is a transverse sectionaljview on the line 5-5, Fig. 3;

Fig. 6 is a `detached perspective view of the pawl carrier and the showing the pawlcarrier and pawl inthe act of being turned to reversethe movement.

Referring to the drawings, lis the bear#` ing.` 2 is amratchet wheel having teeth,`as clearly shown `in the` drawingt" This wheel is; mounted in the bearing and [may be con nected to any mechanism which isrequired to be turned in either direction, such :as a

lifting jack, but it will be understoodthat the devicel can be used `in connection with any mechanism requiring a ratchet device.

3 is the casing, which is mounted-on `the ratchet wheel 2 and is held against the bearing by a washer 4 and a screw 5,`in` the present instance. Mounted in the casing is a carrier 6, as clearly shown indetail`- in Fig. 6, having a socket 7 for the end of a handle 8. The carrier is notched at`9 to receive a pin 10 so as to prevent the handle from turning in the socket. The carrier 6 has a reduced portion 11, which fhas an annular groove 12 therein adapted to receive EATCHET MEcnnnisM;

t j specriato of Letters raten-t. i Application flied January 2,1918.


of which` the following is a specili- `is a longitudinal, sectional;view` 1 order to frictionally lcckthe carrier indicate `when the pawl is t ratelijteti nee. e, 1ere. Seria1No."209,8`61. i 1 i t pin llocated in an opening in the casing 3 sozas to prevent the withdrawalfof the carrierfrorn the casing. In the inner end of the carrier is acylindrical `socket 18 adaptedto receive the spindle 14 of the pawl 15. e rilhepawlhas a head 16 in the form ofa disk whichts the opening; in the` casing and has `atransverse tooth 17 "arranged to"` engage `the 1 teeth of` the ratchet wheel 2.. The tooth is lstraight on one side the end ofa screw and is beveled ou thetopposite` side and can be turned to the position shown inFg. l to ratchet the wheel` 2 in ,the 5 direction of the arrow, Fig. 3, or it can be"`reversed soas to` ratchet the wheelin the opposite direction. "On the ,spindle 14 of thepawl 15.;is a pin 19, which extends intothe slot `20 in the carrier` `so as to prevent the pawl from turningindependently of` the` carrier. Located `back of thespmdlein `the socket 1,8 isa spring 21, which tends to force the `its normal position thepin `19 is in the narrow portion of the slotq20`, asclearly shown t 80 v t pawl out against Athe ratchet wheel, `and when the pawl is in either of itstwo posiinto the enlarged porto hold theI pawlinxthefretracted position,

`while *the carrier is `being turned 3 ande, and mountedin a socket in the carrieris a .ball 25, vheld in "its projected `positionbya spring 26,. ,The

outer end to` etached the casing. Suitableindicating marks, such asthe letters U.and D are formed on `the enlarged portion of the carrierso as lto in the position to jaick upward or downof the socket is slightly contracted ratchet the lifting ward. j t y When the parts are in the position" shown in Fig. 3, the ball 25 extends into thenotch 23 inthe casing andthe pawl is in engage- `ment `with the ratchetwheel2 so `the carrier is forced downby bearingiupon t t ,9o notches 1n thejinterior ofthe casing, as at f sus` Prevent the ball` from becoming` when the carrier 1s removedfrom i that when t the handle 8, the springallows the pawlzto ratchet over the teeth of` the wheel 2 and 25 being forced into the socket and when theu ball 25 is opposite the socket 2a it drops into position and this movement first withdraws the pawl by the inclined portion of the teeth 17f bearing against the teeth of the ratchet wheel, which forces the pin 19 of the pawl into the enlarged portion 22 of the slot inthe carrier so that as the carrier is turned the pin is held in the enlarged portion of the slot by the inclined walls of the slot so that the pawl is clear of the ratchet wheel, thus allowing the carrier to be turned freely from one position to the other, but as soon as the carrier is in position for the balls 25 to enter the notch 24 in the casing, the pawl will be projected in position to ratchet the wheel 2 in the opposite direction to the arrow, lFig. 3.' i

I claim:

l; The combination in ratchet mechanism, of a ratchet wheel; a pivotally mounted casing; a carrier mounted in the casing;

a pawl having ra tooth arranged to engage the teeth in the ratchet wheel; a spring back of the pawl; means for preventing the pawl from turning in the carrier when the handle is reciprocated, said means withdrawing the pawl from engagement with the ratchet teeth when the carrier is turned in the casing to reverse the position of the pawl.

2. The combination in ratchet mechanism,

o'fa ratchet wheel; a casing mounted on the wheel; a carrier located in the casing; a handle attached to the carrier, said carrier having asocket; a headed pawl having a spindle adapted to the socket; a spring located in the socket back of the pawl, the pawl having atransverse tooth arranged to enga-ge the teeth of the ratchet wheel; a longitudinal slot in the carrier; and a pin on the spindle of the pawl adapted to the slot so thatwhen the carrier is turned the pawl Copies of this patent maybe obtained for will yield and the tooth of the pawl will ride over the teeth of the ratchet wheel.

3. The combination of a ratchet wheel; a casing mounted on the ratchet wheel; a car-- rier located ini the casing and having a socket; a pawl having a cylindrical head and a cylindrical spindle, said spindle being located in the socket in the carrier; a spring in the socket back of the pawl, said pawl having a transverse tooth arranged to enter the teeth of the ratchet wheel, the carrier having a slot; a pin on the spindle of the pawl arranged to enter the slot, said slot being enlarged and having inclined walls so that when Vthe pawl is pushed in, on turning the carrier, the pin will enter the enlarged portion of the slot, and, on continuing the turning, the pawl will be held in the vretracted position against the pressure of ythe spring so that the carrier and the pawl can be freely turned into either of its two positions.

A 4L. rlhe combination in ratchet mechanism, of a ratchet wheel; a bearing in which the wheel is mountedga casing mounted to turn freely Ion the ratchet wheel, said casing havinga cylindrical chamber therein; a carrier having a cylindrical reduced portion adapted to the chamber in the casing; moans for holding the carrier against longitudinal movement, the casing having two internal notches; a spring-pressed ball in the carrier adapted to enter either one of the notches, a. carrier having a socket in its inner end and having a slot communicating with the socket, said slot being enlarged at its inner end; a pawl having a spindle mounted in the socket and having a head adapted to the cylindrical chamber in the casing; a pin on the spindle arranged to iit the narrow portion of the notch when the pawl is projected and arranged to enter the enlarged portion of the notch when the pawly is forced in, on turning the carrier.

In witness whereof I a-iiix my signature.


ve cents each, by addressing the Commissioner of Patents,

n Washington, D. C.

Referenced by
Citing PatentFiling datePublication dateApplicantTitle
US4128152 *Apr 6, 1977Dec 5, 1978Fritzmeier AgRatchet transmission
US4561320 *Dec 28, 1981Dec 31, 1985American Manufacturing Company, Inc.Two-way pawl-ratchet wheel assembly
U.S. Classification74/146, 74/578
Cooperative ClassificationB61H13/02