US381089A - Levi b - Google Patents

Description

(N0 Mantel.)

B. START.

muss. y

Patented Apr. 1-0, 1888,

4 -UNITED STATES 'PME1 IT1 OF CE,

nnvr B. STUART, OF

snnronn, GONNEOTIGUT, ASSIGNORFONE-HALE ro W. E. nonnnrs, OB SAME PLAGE 7 TRUSS.

SPECIEICATION forming part of-Letteis Patent N0. ss1,oa9, a;;wa April 10, was.

Applicatioxifiiod Decefnber 20,187. Seria1'No.58,482. (]}fo model.)

T all wiwm itjnay concern:

Be it known that I, LEVIB. START, of Seymour, in the county of New Haven anti Stehe of Connecticut, have invented a new Improve- 7 1 5 ment in 'lrusses; and I do hereby declare the following, when haken in eonneotion withyaccompanying drawings and the letters of reference marked thereon, to be a full, clear, and exa-ct desoription of ehe saure, and which seid drawings constitute pa.rt of this specifioation, and representa, in Figure 1, an o utside or front view of the pa'd n.nd somuch of the fraime as is neeessary to 1llusrafie the invention; Fig. 2, a side view of the pad, looking toward the forward end of the frame; Fig. 3, a vertaica.l secbion throngh the frame and parbial section of thepad, illustrating the conneetion of the spring with the frame and pad; Fig. 4, a to.p view of the pad and frame; Fig 5, the spring detached.

This invention relates 110 an improvement in trusses, having speeial reference b o the attac h menbof the p'ad to b he frarz1e, the object of the invention being to give l;o the pad a self-adjustable bear-ing or 1ifting acbion; and ib cousists in a pad hung to the frame as upon a hinge, With a spring-pressure between the frame and pad below lshe hinge, the tendenoy of whiczh spring is 120 turn tshe body upon the hinge and give t;o the body an upward lifting aotion 01 pressure.

In ilhdstrating the invention Lshow the framesubstantialiy such as illustfated in Pab ent No. 237,926, granted for my inventiori February 15, 1881, but only show the front porbion of the frame 120 which the body is atbached, that being snffioient for Ehe illustration of the invention.

A A represenb the two wires which form the' frame,but which are connectedby a bend, B, at the extreme forward end of the fran1e.

0 represents the pad, whioh will be of a shape according 130 circumstanoes and es in other consbructions of truss. The pad is hinged 110 the frame. The p0inb of hinging upper bar of the frame, and so that the bar itbetween the' frame anti pad being below the seif forms a pino1e or support for the spring. Thespring is made from a single-pieoe of wire, the porti0n of the Wire between the Wo parts D Dof the spring being bent into U 1 shape, as seei1in Fig. 5, E representing the U-shaped po'rtion of.the spring; This U- shapecl portion eXtends down onto t;hep;d, as

repres"ented in Figs. 2 and 3, and so as totake a firm b'earingthereon. (Ehe extreme endsof bhespring are made fast to the frani'ia, as here representei This is doiie byex trnding the 1egs 170 the 1ower parb of theframeand bend-' ing the ends around thabpart of the frame, as J representsed ab a a, Fig. 1. The relation of the per]: E of the spring 110 the fixed legs go is suoh as t0 g ive ohe pad an in'clination so the frame- Uhat is, so thab bhe pad standsaway from the 1ower part of v the frame, bot is yieidirigly hold by thespring, so that pressure upon thebody may force the pad toward the frame, as indi cated in broken lines, Fig. 2.

TheSpring is best secured to the frame by a p1ate, F, one end of-whieh is bent arouixd the npper part of the franne,as ab G, and, ex-

tending downvi ardinclosesthe parb E of the spring, a.nd 1s secured 130 tqhe pad by'a sorew, H, whi0h forms a pivot on which the'pad may beperinitted a limitd amount of oseil-lation to give i t| be required transversepositiom A yoke, I, is att-aehed by its.upper end to the So pad above the frame, as als b, 'the yoke extending outside the frarne, thence down to. the

body below he pivots, where the 1ower end of the yoke is adjustabiyseeured 110 the pad, as

at d, this adjusbarbility being produeed by means of a*screw e, which may be sorewed into orwitahdrawn from the pad,.so asto give a greater or less amounta of play for the pad.

The yoke comes' 110 a bearing up0n the frrne nn der the aobion 0f the spring, es represented d in Fig. 3, which limits the extenb of rise,

swing, or upwa1*d1iftwhieh m a'y be imparted 110 the pad, .and bhis extenh of movemerit may be adjusted by means of the serew e. Nor mally, however, should be such fihat the pad will rest o.n the person without sub'stanbizmi eontacbof the 'yoke, and so that the pressure Will alwayslb yield- 1ng.

The action of the spring upon bhe pad. is 110 rooi the adjustmrant'of the yoke give ib an upward Lift or pressure-an effect which is desirable in this dass 0f trusses; bat: ab the same time it permits the pad 130 yield under the movements of the body, so that it Will a1ways retain th same relative position to the parts so which ib is applied.

It Will be evident that while the yoke is desirable, in order to lin1it the extreme upward lift; of the pad, it is not: essentsial 150 the invention and may be omitted.

l. A frame eomposed of tw0 parts, A JA, united at; the forward end, the pad O, hinged to the upper part A of ehe frame, the pad extending downward therefrom, wibh a helical spring surrounding the upper pa.rt 0f the frame as a pinble, the end 0f the spring made fast to the said frame, the spring constructed With an extension 01 arm downward from the coils 0nto the pad below the frame, substantially as described, the said spring operabing to turn the body npward from the lower part; of the frame and give t0 it a lifting action.

2. 'lhe combination of a frame composed 0f two parts, A A, a pad hinged to the upper part of the frame, a spring betsween the frame and pad to operate npon t;he body of said pad below the hinge, and a yoke, I, outzside the frame, the yoke secured ab its upper end to t;he pad both above and below the frame, the said yoke serving to limit the extent of the 1ift1ing actsion 0f the pad, substantially as described.

J OHN L. SOMES, LIFFORD J. ATWATER.

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