US2714002A - Spring compensating device - Google Patents

Description

July 26, 1955 R. E. TAYLOR 2,714,002

SPRING COMPENSATING DEVICE Filed Jan. 25, 1954 2 Sheets-Sheet l 1 it mu] 5 3 2 IKIVENTOR ROLL: N E. TAYLOR, :[Bv

TTORNEY July 26, 1955 Filed Jan. 25, 1954 R. E. TAYLOR SPRING COMPENSATING DEVICE 2 Sheets-Sheet 2 INvENToR RoLuN E.Ti\v|.o|2,

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SPRING COMPENSATING DEVICE Rollin E. Taylor, Dayton, Ind.

Application January 25, 1954, Serial No. 405,802

3 Claims. (Cl. 267-20) This invention relates to a spring compensating device particularly designed whereby through a leverage system, a short heavy spring may be employed to give the effect of a lighter and longer spring in the spring action thereof. Where spring length is limited and there is room for the leverage system, the structure comprised in this invention may be very well used in such instances as front and rear end suspensions for automobiles and trucks, landing gear suspensions on airplanes, railroad car suspensions, and even in smaller spaced conditions such as recoils in guns, and even in machinery.

These and many other objects and advantages of the invention will become apparent to those versed in the art in the following description of one particular form of the invention, as illustrated in the accompanying drawings, in which:

Fig. 1 is a view in side elevation and partial section of a structure embodying the invention;

Fig. 2 is a view in front elevation and partial section on a reduced scale; and

Fig. 3 is a view in side elevation similar to that shown in Fig. 1 but with the spring under compression.

A leverage system is constructed to have upper and lower substantially horizontally disposed bars 10 and 11, the horizontal positions as indicated being relative of course, and to each end on the same side of these bars 10 and 11, there is hinged respectively connecting levers 12 to the upper bar 10, and 13 to the lower bar 11, the hinging being accomplished by any suitable means, herein shown as by pins 14 and 15. These levers 12 and 13 cross each other to be rockably interconnected substantially at their center points in respect to their lengths by a pin 16, so that the levers 12 and 13 normally are presented between the bars 10 and 11 in an X shape. The free ends of these levers 12 and 13 are respectively slidably tied to the bars 10 and 11 in the following manner.

The upper end of the lever 13 carries a pin 17 which is slidably guided through an arcuate slot 18 extending along and through the bar 10 at a distance removed from the pin 14 toward the free end of the bar. The lower end of the bar 12 has a pin 19 which is slidingly received through the slot 20, also arcuate in nature and being positioned along the bar 11 at a distance from the pin 15, the bars 10 and 11, in fact, being duplicates of each other. On top of the bar 10, there is a plate 21 fixed such as by welding as a base for supporting a spring of a helical nature, the spring being designated by the numeral 22. The spring 22 is mounted on the base 21 to be substantially centered along the length of the bar 10.

A top bearing plate 23 is provided to engage against 3 the top side of the spring 22, and there is fixed to this plate 23 in a rockable manner by means of a pin 25 a connecting link 24 extending downwardly and substantially axially within the spring 22.

The lower end of this link 24 is rockably connected to the short arm 26 of a lever 27 which is hinged through atent G 2,714,002 C6 Patented July 26, 19 55 the pin 28 on an inclined post 29 in turn fixed to the base plate 21. The lever 27 is in fact a bell crank and has a lower arm 30 which extends on downwardly and through the plate 21 freely to interengage the pin 17 in a rockable manner.

When pressure is applied to the plate 23, the spring 22 tends to be compressed, with the result that the plate 23 travels downwardly toward the plate 21, and resultant action is that the connecting link 24 will push the arm 26 of the crank 27 downwardly tending to rock the arm 30 outwardly and thus carry the upper end of the bar 13 outwardly along the slot 18 as indicated in Fig. 3, simultaneously causing the lever 12 likewise to have its pin 19 travel outwardly in the slot 20, thereby reducing the distance between the bars 10 and 11. By means of the lever 27, the plate 23 normally is spaced the full distance from the plate 21 as is required by the spring 22 when it is not under load. The lower cross arm 11 may of course be secured to any suitable base such as the plate 32.

Thus it is to be seen that by use of the spring 22 which is comparatively short as compared to the distance between the plate 23 and the plate 32, the overall travel will be resiliently had by means of the leverage system through the arm 12 and 13 as set up by the crank lever 27 and the interconnecting length 24.

Therefore it is to be seen that I have produced a structure quite simple in form for the purposes above set forth, and while I have described the structure in the one precise form, it is obvious that structural variations may be employed without departing from the spirit of the invention, and I therefore do not desire to be limited to that precise form beyond the limitations which may be imposed by the following claims.

I claim:

1. A spring construction comprising a supporting member; a lower member substantially parallel thereto; a lever hinged to the supporting member and extending diagonally downwardly thereunder; said lower member having a slot therethrough toward one end thereof; a bearing member carried by the lower portion of said lever and riding in said slot; a second lever hinged to said lower member substantially vertically under the hinge of the first lever to said supporting member; said second lever extending diagonally upwardly crossing said first lever; said supporting member having a slot therealong; a hearing member carried by the second lever and resting in said supporting member slot; said two levers being rockably interconnected at their mid points between their hinged axes and said bearing members; a spring having one end bearing on said supporting member; a bearing member at the other end of said spring; a lever rockably supported by said spring supporting member; one end of said last lever being rockably engaged with said second lever slot bearing; and a link rockably inter-connecting the other end or" said last lever with said other spring end bearing member.

2. A spring structure comprising a spring; a member supporting one end of said spring; a collapsible parallel movement device carrying said member, said device comprising a pair of substantially parallel bars, a pair of crossed levers rockably interconnected at their central zones, one of said levers being pivotally connected to one end portion of one bar and the other lever being pivotally connected with an end of the other bar, the free ends of said levers being slidingly carried along 0pposite end portions of said bars to have the levers in X form between the bars; said spring supporting member being carried by one of said bars; and a leverage system between the other end of said spring and the free end of one of said levers inducing reciprocating travel of 3 4 said one lever free end along the spring supporting mem- References Cited in the file of this patent ber bar under compression and release of the spring. UNITED STATES PATENTS 3. The structure of claim 2 in Which said leverage system comprises a bell crank rockably supported by ,26 5 Boswell Apr. 3, 1918 said spring end supporting member, a connection be- 5 1,8 8 Dallas Jan. 12, 1932 tween one arm of the bell crank and said other end of 2,0 5, Weaver June 18, 1935 the spring, and the other arm of the bell crank is rockably interconnected with said second lever free end. FOREIGN PATENTS 357,867 Great Britain Oct. 1, 1931 10 448,158 Great Britain June 3, 1936

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