US1418031A - Vehicle spring - Google Patents

Description

C. P. STANBONJ VEHICLE SPRING.

APPLICATION FILED APR, 30. 1919.

1,418,031 Patented y 30, 1922.

Inveuior I oeavlesl! Siawb'on,

unites stares CHARLES 1. STANBON, 0T1 LYNN, MASSACHUSETTS.

VEHICLE SPRING.

Application filed. April 30,

To all QlJ/tmn may (rmmcrn:

Be it known that 1, Clinics P. Srsnnon, a citizen of the United States, and a resident. of Lynn, county oi Essex, and Common wealth of ltlassachusetts, have invented an Improvement in Vehicle Springs, ot'which the "following description, in conn ction with the accompanying drawings, a specification, like characters on the drawings representing like parts.

T his invention relates to vehicle springs and has tor its object to provide a novel "form of spring particularly adapted for use on automobiles or any fast moving vehicles.

in the drawings of the embodiment of my invention illustrated and described herein;

Fig. 1, is a side elevation of .my novel spring;

Fig. 2, a plan of the same;

Fig. 3, an end elevation on an enlarged scale; and

Fig. 1, a detail partly in section, on the line 4l-4t, Fig. 2, also on an enlarged scale.

The type of spring illustrated in Fig. 1, is commonly known as the full elliptic, that is, it comprises two concave convex halves, or sets of leaves, of similar construction, oppositely positioned and secured at their ends, as distinguished from the semi or half e liptic type, that is, either the upper or lower half; and also as distinguished from the three quarter elliptic type comprising one entire half and a shortened opposite halt. My invention is equally applicable to either type, and it will be apparent that the description 013 my invention as embodied in one half spring or one set of leaves will apply to all types mentioned.

illimproved construction, Figs. 1, 2, 4 comprises a master leaf 1, of full length, each end 2. of which is suitably curved to embrace the bolt or spindle 3, Fig. 3, and lock the leaf thereto.

This end 2 is toothed at 4, Fig. 3, to engage similar teeth on the corresponding master leat member 5 of the lower half, thus permitting each member to have a good locking grip on the spindle 3 and at the same time to yield slightly relative to the opposite member when the strains and stresses imposed on it by the weight and movement of the vehicle make it desirable. I

Superimposed upon the leaf 1 are a plurality of shorter leaves 6, 7, 8, 9, 10, 11, 12, 13, each progressively shorter than the preceding one, and each provided near its end Specification. of Letters Patent.

depending lip 1 1, which en Patented May 30, 1922.

1919. Serial N0. 293,799.

and on each side at its lower edge with a ages the upper edges or" the next lower eat to prevent lateral movement of one relative to the other.

When a vehicle runs over a hump in the road, it is well known that, as the body of the vehicle goes up into the air the several leaves of each spring separate in proportion to the resistance encountered.

To prevent the leaves from separating too far with the danger that, when the body descends it will break the spring, it has been customary to restrain the separating movement of the leaves within certain limits by means of clips secured to the under face of the inner leaf and embracing two or more of the leaves above it.

In order to'use these clips it has been necessary to use full convex springs, that is, convex throughout their length as distinguished from a convex-concave spring such as shown in Fig. 1, in order to avoid the danger of the clips on the lower half striking the clips on the upper half: of the spring when the spring is under pressure or compressed.

Or if the clips should not strike, and the inner leaf 1 of the upper half should be compressed until it rested upon a clip on the inner leaf 5 of the lower half, the upper leaf would undoubtedly break because the strain would be unequally concentrated on that particular point as a fulcrum instead of at the end of the spring.

While a convex-concave spring such as shown in Fig. 1, is much more flexible and yielding than a full convex spring it has been impossible to use it for anything more than the very lightest work because there is not sufficient clearance between the upper and lower sets oi"? leaves to use the clips for locking the leaves of each set together.

In order to permit the use of this most flexible form of spring, convex-concave, I have conceived the novel idea of providing an unlocked or movable anchored master leaf 15 of such length that it may overlie the shortest leaf in the set and of movably anchoring it in such manner that it will permit a reasonable play of the several leaves beneath it, but restrain them against undue lay or undue vertical separation.

To that end the leaf 15 in each case is shown as extended so that its ends underlie and are movably anchored to the pins 16, and are upturned at 1-7 to limit the upward movement of it and prevent the leaf from springing upward too far and away from the others. when released from tension,. or when going over a hump.

The upturned ends 17 slightly from the ends 2 of the leaf 1 to provide for the necessary endwise play thereof.

It Will be obvious that by this construction the full advantage of the greater flexibility of the convex-concave spring can be obtained without the danger of breaking it under the conditions named. It will be noted that the master leaves 1 5, of the spring are very flexible and almost touch in normal position.

hen the weight is imposed upon the spring the long master leaves 1, flexv to substantially thedot'ted line position F 1, and almost or quite meet, and in some cases With a smooth bearing one upon the other from the bolts 3 inwardly, and which would not be the case it clips were used. The free length of the leaves and therefore the working or flexing length obviously diminishes as they close up and meet under pressure, thus reducing very materially the dan ger of breakage by transferring the load progressively to an increasing number of leaves.

Obviously my invention is not limited in all details to the foregoing described. and illustrated embodment, andI claim:

1. A full elliptic spring comprising a plurality of master leaves movably anchored to oppositely positioned spindles and 0pare separated 1 posed longer leaves individually immovably anchored to a common third spindle.

2. A full elliptic clipless spring comprising master leaves movably anchored, and opposite longer master leaves individually immovably anchored and interlocked at their ends to a common third spindle.

3. A full elliptic spring comprising master leaves movably anchored, opposed longer master leaves each relatively immovably anchored and a triangular anchorage for the leaves but jointly movable.

4. A full elliptic spring comprising mastor leaves movably anchored opposed longer master leaves each relatively immovably but jointly mo /ably anchored. former master leaves to a joint anchorage.

5. A. full elliptic spring comprising an anchorage master leaves movably anchored theij'eto and master leaves individually relatively immovably but jointly movable anchored thereto in different planes and interlocked one with the other upon a separate spindle.

6.2111 elliptic spring comprising inner and outer master leaves. leaves or". varying length between them with leaf positioning ears thereon, the outer master leaves movably locked to one common set of anchorages the inner master leaves individually immovably lockedto a different set of anchorages and interlocked with each other.

In testimony whereof, I have signed my name to this specification.

CHARLES P. STANBON.

and between the

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