US1034634A - Shock-absorber. - Google Patents

Description

GEORGE CUSHING MARTIN, 0F LOS ANGELES, CALIFORNIA.

SHOCK-ABBOBBER.

specification of Letten Patent.

Patented Aug. 6, 1912.

Application tiled Iulry 7, 1909. Serial No. 506,407.

To all whom it may concern:

Be it known that I, Groen CUsHiNG MARTIN, a citizen of the United States, residing at Los Angeles, in the count of Los Angeles and State of California, ave invented new and useful Improvements in Shock-Absorbers, of which the following 'is a. specification.

This invention relates to im rovemeiits in a certainshock-absorber described in an application for Letters-Patent of the*v United States filed by me on the 10th da of April, 1909, Serial No. 489,214fiii whic isshown a slip rod extending into a case and frictionally engaged h v a toggle-joint operated brakeshoe when moved lengthwise in one direction.

Objects of this invention are:

(1.) '1.0 provide a more positive and easily manipulated adjustment of the pressure of the brake-shoe von the slip-rod;

(2.) 'lo-provide novel means for taking up thc movement of the shock-absorber in all directions; that is,-to provide the device with an effective universal joint;

(3.) To provide a resilient device in connection with the ivot which forms the principal clement o the toggle-joint whereby pressure on the slip-rod may be regulated and whereby the said pressure may e constantly maintained in case the rod may or may not wear more in one place than in another; and to provide means for taking up, through the action of said spring, wear on various parts of the device.

(4.) To provide a novel shoe which engages frictionally the slip-rod and is so arranged as to move freely upward with the upward motion of the slip-rod, thereby reducing the pressure of said shoe on said slip-rod, and to provide for forcing said shoe downward on the instant that the sliprod starts to move downward, thereby friclionally engaging the said lslip-rod.

(5.) 'l`o make )rovis'ion whereby the frictional surface o said slip-rod may 'be increased, without maieriall)y increasing thil weight or size of the device. This is accomplished by using in the place of a siiigle-pcre slip-rod a multiple slip-rod which may be formed of two or more parallel fiat pieces. strips or sections runnin 'through the case of the shock-absorber an arran ed in much the same manner as the former s ip-I rod; the arallel portions of the slip-rod being hel apart by a shoe which remainsstationary when the slip-rod moves in either direction. The sli -rods may be variously formed but referably will be fiat with the broad sides tween and engaging the shoes, and the number of slip-rod members ma be increased if it is desired to increase the friction surface. The sli -rod members may be fastened together at tie bottom in any suitable way as by means of a bolt riining through an eye-piece which will be used for fastening the slip-rod to the axle, and the parts above mentioned may be separated by soft rubber washers to prevent rattle.

6.) An object is to provide a shock-absor r the resistance of which to the recoil of the spring will be proportional to the force of such recoil, and which will alitomatically offer high resistance to the recoil of the highly-compressed spring, and will not offer any resistance to the easy motion of the automobile-springs in their normal position under a normal load.

The accompanying drawings illustrate the invention iii the form at present deemed most desirable.

Figure 1 is an elevation artly in longitudinal mid-.section on line indicated by a, Figs. 3 and 4. The removable side is omitted from the non-sectioned portion'. Fig. Q is a transverse section on line :indicated by m2, Fig. 1; theside wall being fastened in place. Fig. 3 is an elevation from the arrow 3 in Figs. l, 4 and 5. Portions of the frame and of one leaf of the spring are shown in section. Fig. 4 is a plan section from irregular line Fig. 1. Fig. 5 is a view of the appliance attached to one side of a vehicle, a fragment of which is shown. This view is from the arrow 5 at the right of Fig. 3. Fig. (i is a detail of the taper slipiod which is shown in edge elevation.

The bracket 1 is mounted on the (ish-plate 2 which is fastened to the top of the spring 3 by the clip 4 havingr nuts said lish-plati 2 havinor a bent seat in which is titted thc bur 7 oi the frame of the vehicle, to the axle t5 of which vehicle the lower portion of the spring 3 is secured b v the clip S) to which the slip-rod foot is fastened by bolts ll. The slip-rod may be pvoted to the foot 10 by a bolt 1'2 the axis of which is at right angies vto the vehicle axle 8 and parallel with the spring 3, and said slip-,rod muy consist of one or more members, a plurality of menibers bein preferred.

#In lthe rawings, two parallel members 13 CGH 327K. C(

" ae the springs l am? m: if*

ISG

due to the extra thickness of thel slip-rod, and the resiliency of the spring-35 allows the toggle-joint to assume a position nearly at right angles to the slip-rod where 'it ex.- erts its most effective force un'iilv the thinner portion of the sliprod is. reached; the spring 35 being constructed to positively support the togglebansuppoit 34. in approximately .the vposition shown in Fig.,1, ex'cept when 1v5l-the toggle-bar is brought near right-angled position as above stated. In this way the 4shock'absorber automatically. accommodates itself to all conditions; that is, it does not grip the slip-rods at all in a normal position, but grips them with an increased grip as the bump is increased or the compression :of the spring is increased.

, .Itis not important that the upper portion of the slip-rod be tapered, but the taper may eittend from end to end of the taper-section.

AIt, is not necessary that the slip-rod shall be.

bina'tion of two elements, means to resilopposition to the thrust vof the togg iently hold said elements.apart,.and mechanism constructed -tov yieldin ly resist the vparting movement of said eements when the elements are abnormally near each other., and to offer comparatively slight resistance to the parting movement when the elements are normally spaced apart, I have preserved free resilient movement when the springs are not abnormally compressed, and I avoid any action of the springs which will tend to cause the vehicle-body to bound.

1. Thecombiiiation with a'. case, of a sliprod comprising a plurality of sections longitudinally movable in the case, a plurality of shoes to engage the slipmod sections, a toggle-bar support, a toggle-bar between said support and the shoes to o perate the shoes, and a spring to hold said su port in 2. The combination with a case, of va sliprod comprising a plurality ot sections longitudinally movable in the case, a plurality`4 `of shoes to engage the 'slip-rod sections, a

togzglebar support, a toggle-bar between said support and the shoes to operate the shoes. a springy to hold said support in oppo- Sltiflli to the thrust of the togglefhar. and

mea "adjusting-tlwALen sione-o Y -t he sprl ng.

3. In a shock-absorber, Athe combination with acaso, of a slip-rodV movable said case, means operable by the movement of the slip-rod in one direction to frictionally' resist such movement, ay resilient support for said means, an upwardly-tapering wedge to adjust said support, and a bolt with nuts toadjust the wedge. Y l

4. In a shock-absorber provided slip-rod and frictional mechanisr'i'iY therefoft, the combination with. a case, of a bolt exsk tending through the. case and provided with' t a neck inside the case, nuts to adjust the bolt'- in the case, and a wedge provided witlra;

slot on` said neck and movable therewith for Athe purpose of adjusting the frictional mechanism of the shockabsorber. y

5. In a shock-absorber, thq'mbination of a case, a slip-rod in the case, awedge-block on one side of the slip-rod, springV to hold said block in wedgin position, a brake shoe on the other side o'f t e slip-rod, a spring tof hold the brake-shoe in wedgingposition,

and a toggle-bar operable by the movement of said brake-shoe to c'ause said' shoe Jafrictionally engage the slip-rod when said slipvrod moves in -the direction in ,which it is pressed by the spring.` V- 6. In a shock-absorber, the combination of "a case, a slip-rod. in the case, a wedg'eblock on one side of the slip-rod, a spring tohold said block in wedgin'g position, a brake-Shoe on the other side vot' the sliprod, a spring to 'hold the brake-shoe in wedging position, a

tog le-bar-operable by the movement -of sait? brake-shoe to canse .said shoeto frictionally engage the slip-rod when said slip Aa case, a slip-rod in the case, a wedge-block Arod moves in the direction in kwhich it. is

on one side of the slip-rod', a springjto'hold said block in wedgingposition', a brake-.shoe

on theothe-r side of the slip-rod, a spring-to' hold the brake-shoe in wedging position, a i

toggle-bai' operable by the `movement of said brake-shoe to cause said shoe to frictionally engage the slip-rod when said slip-rod moves` in the direction in which it is pressed by the spring, and means for resiliently resisting the thrust of the toggle-bar, said slip-rod being provided niith a taper port-ion to loosen the shoe on thc reverse m'ovei'iient of 8. In `o. shock-absorber, thel` combination with a case, of a slip-rod comprising two sections one' o which has` parallel sides and theotlier ofwhich tapers, a wedge-block to engage one of said parallel sides, a. separating'block between the sect-ions,:Vl'iiakeshoe engaging the tapering sectionganda togglebar operalileby v the-shoe "tffrictionui yengage'andhild the taper-section when it moves iii the direction of its `thicker end and to neleasewhen the shoe moves in reverse direction. A

9. In a shock-absorber, the combination with a case, of `a" slipl-rod comprising two sections one ofwhichhas parallel sides and the other of which tapers', a wedge-block to engage one of said parallel sides, a separat-v ing-block between the sections, a brake-shoe engaving the taperin section springs to holdothe Wedge-block ind 4brake-shoe, and a togglebar operable bythe shoe to friction ally 'engage andhold the taper-section when',

and hold the taper-section when it moves in.-

the direction of its thicker'encl 'zand `to re-v lease when the rod movesvin fthe reverse di.-

rection. andv a resilient support for the t"tffsle-lmr. 1 Y Y y "1.1. vIn itnsliocl{-ab`so'r-ber,,the combination with a, ease,V of a slip-rod comprising ftwo sections one of which has parallel sides and' theother 'of which tapers,r'a.'wedgeblockito engage'oe of said pai'allelsidesfa separat-A inghblo'clr,.betweenv the sections, a brake-.shoe engaging the tapering fsection, springs to hold the wedge-block and vbrake#shoe, a ...toggle-bnnoprnble by the shoe' to friction-,-

ally engage vand hold'the taper-section ,when it movesA In the directionof its thicker end and torelease 'verse direction, and a resilient support for the toggle-bar.

the Y whenV then-odv moves in fhgrr 12. In a Shoclrabsorber, the Combination with a case, of a slip-rod comprising two sections one of which has parallel sides amilY the` other of which tapers, a Wedge-block to engage one of said parallel sides,'a separating-block between the sections, a brakeshee engaging the tapering section, a toggle-bar operable by the shoe to rictionally. engage and hold the ta er-section when it nieves in the direction p its thickereend and to release when the rodA moves in the yreverse li- Yrection, a resilient'support for the toggleba.r, and means for adjusting saidlresilient support.

13. In e.A shock-absorber, the-combination with a case, o a sii -rod comprising two sections one or which as parallell sides and vthe other of which tapers, a wedge-block to engage one of said parallel sides, a seperating-block between the sections, s. brake-shoe engaging'- the tapering .section, springs to hold thewedgebleck :ind brake-shoe, e. togg1e-bar operable by the shoe toI frictionyally engageand hold the taper-secton whenA it movesA 1n the direction of itsv'thieker end and torelease when the rod moves inA the reverse direction, a resilientsupport for the togglebar, and means for 'adjusting seid, re-

silient support. I14. The combination with e sliprodhaving relatively thick and thin portions, of a Ibrake-shoe to engage such siip-rod, a toggle,- I berrsnppert, resilient means to hold said support,A and a toggle'bar between sai brakeshoeand the support. l

In testimony whereof, have hereunto setv my hand at Los Angeles, California-,this 2d day of July, 1909. f v

1 t GES. CUSHING- MARTN.

' Jeune R; TowNemNn,

L. BELLE Rien.

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