USRE7832E - Improvement in car-springs - Google Patents

Description

G. F. GOIDLEY. Assignor of one-half Interest to C. Scott.

CAR-SPRING.

NO. 7,832. Reis sued Aug.7,1 877.

Mill-Ill ,N.PETERS, PNOTO-LIYNOMAPMER, WASHMGTON, n. 0.

UNITED STATES GEORGE F. GODLEY, 0E

' ONE-HALF PHILADELPHIA, PENNSYLVANIA, ASSIGNOR OF INTEREST TO GHARLES SOOTT..

IMPROVEMENT m CAR-SPRINGS.

Specification forming part of Letters Patent No. 161,115, dated 'March 23, 1875; Reissue No. 1,832, dated August 7, 1877 application filed March 27, 1877.

To all whom it may concern;

Be it known that I, GEORGE F. GODLEY, of the city and county of Philadelphia, State of Pennsylvania, have invented new and useful Improvements in Springs; and I do hereby declare that the following, taken in connection with the drawings which accompany and form part of this specification, is a description of my invention sufficient to enable those skilled in the art to practice it.

My invention consists in the preparation of bars from which ed ge-coiled spiral springs are to be formed by making them of such crosssection that the compression of the metal of the inner part of the'coil, and the extension of the metal in the outer part of the coil, shall render the bearing-surfaces of adjacent coils parallel, and afford a surface contact of the whole or part of contiguous coils when the spring is closed. This is effected by making the two opposite flat surfaces of the thickest part relatively inclined toward each other, so that when the bar is coiled such inclined surfaces shall become parallel with each other by reason of the outer part being extended and thinned, while the inner part becomes compressed and thickened; and it further consists in combining two conical springs, one on top of the other, by employing a wooden or iron piece havinghubs projecting into the center of each, and serving to prevent their separationr In the drawings, Figure 1 shows a vertical section of a spring coiled into a conical shape, and made from one form of my improved bar. Fig. 2 shows a vertical section of two of such conical springs when used one upon the other. Fig. 3 is a spring of cylindrical form, or of uniform diameter, made from a similar bar. Fig. 4 shows the cross-section of the bar, suitable for a car-spring, coiled to form the springs shown in Figs. 1, 2, and 3 and Figs. 5, 6, and 7 represent crosssections of several varieties of bars, having their opposite faces inclined to a degree which will insure their becoming parallel after being coiled.

In the drawing it will be seen thatthefaces a b, which in the blank or uncoiled bar incline and before it has beento each other, in the coiled spring-become parallel with each other, thus affording a broad base or bed for the coils whenever a heavy load or sudden compression shallbring the coils in contact. Moreover, there is greater strength in the spring itself than when there is not equality of thickness in the body of the coiled bar. The spring being made of steel hardened and tempered, it will be understood that the thinnest part, a, will be hardened throughout, giving the requisite resilience or elasticity, while the thickest portion, being only surface hardened, retains a toughness conducive to strength. When coiled into the conical shape the compression of the spring exhausts the resilience of thelargest part first, so that as the pressure increases one coil lies flat upon the next one,.just as one leaf of an elliptic spring lies upon the next leaf, and the coils are not injured in the least when so compressed, because of the adjacent surfaces being flat and parallel, affording a perfect support.

In Fig. 2 two springs, dand e, such as above described, are shown arranged for use as a compound spring, the two being loosely connected by employinga plate, f, of wood or iron,having axial projections or pins 9, which are respectively lodged in the smaller end of each spiral, the plate having, if desired, a rim, h, on either or both faces, and I also use a similar plate, 6., having, however, one central boss or pin for the top or bottom, or for both.

In this mode of using my improved springthat is, in two parts-which I find desirable in some cases, as, for instance, for a passengercar bolster-sprin g, I secure an increased amount of elasticity, and if by accident either part should break, it can easily be removed and another substituted, but for most purposes I find that practically a single spring of my constructing affords as soft and easy a motion as is needed. Instead of coiling a bar in the form of a cone, it may be coiled on a cylindrical mandrel, and thus be of uniform diameter throughout.

When desired for a bearin g-sprin g, a nest or several of these springs, either conical or cywhich may .of the plate parallel tially as set forth.

canbe insertedin the bolstenby boring ahple ina the-same when space permitsaud thespring introduced into the same. I

I employ bars of various other forms in cross-section, all, however, having the especial characteristiefirst abovenamed, to wit, their opposite sides so inclined-t0 eachother-that when the bar is coiled they shall'become parallel, whether the thinner part shall be coiled on the outside or inside of the. coil,an dwheth er the full width of the bar be thus parallel or otherwise.

While my improved construction is admirably adapted. for railway-cars, yet it; is applieable for almost every purpose whereacoiled spring can be employed.

1 claim 1. A spiralsolid plate-spring having the upper and lower surfaces of v the, thickest part.

when coiled, substan- 2. YA spiral, a solid platespringhaving the opposite surfaces of -the plate parallel when coiled, and the plate itself thinner at its central portion. substantiallyqas set forth.

3. The combination, with the two coneshaped coils d a, of v the. plate f, providedwith axial or with rim; projections, substautiallytas' 1 set forth.

edge-coiled spiral spring whose. metal by coiling has. parallel bearings, or

4. An displaced form in cross-section of the bar of, metal having necting-web of lesser thickness than the edges I which it connects, substantially as shown and described.

7. Anedge-coiled spiraltspring madeof a bar of inclined to each lesser central thickness, substantially as shown and described.

a bar; having a. center o 1 less. I dge$a snpnortingsurfasies the contiguous c il in gconjnnction; with! a thinner web, substantially shown and'described.

5. An edgecoiled spiral spring having a bar, substantially shown and described, whereby the adjantcoils shall-have parallel surfaces 1 for a portion only of:t-hezhreadth of the bar.

6. An edge-coiled spiral spring made of a a central flat-sided conmetal, having its opposite faces flat and other, and having a. reduced or s.v Am edge-coiled spi al sprin made from thickness: than and havingone. .or more; flat inner gas, s s antially as she w n nd I described.

A an ar icle. ofim nf ctu a. b ank or a of 1 meta adapted r c i ed. spri g having; t e i c n d oppo it sides-and athii ner portion orwe b, as shown-and thascribed.

(meson GODLEY'.

Witnesses vArrow. J. BoswELL, ARTHUR :BOSWELL.

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