US591812A - Semi-elliptic spring - Google Patents

Description

(No Model.)

J. BUGKLEY.

SEMI-ELLIPTIG SPRING.

Patented Oct. 19,1897;

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UNITED STATES PATENT OFFICE.

JOHN BUOKLEY, OF CHICAGO, ILLINOIS.

SEMI-ELLIPTIC SPRING.

SPECIFICATION forming part of Letters Patent NO. 591,812, dated October 19, 1897.

Application filed May 17,1897. Serial ll'o. 637,074. (No model.)

To aZZ whom it may concern:

Be it known that I, JOHN BUCKLEY, a citizen of the United States, residing at Chicago, in the county of Cook and State of Illinois, have invented certain new and useful Improvements in Semi-Elliptic Springs; and I do hereby declare the following to be a full, clear, and exact description of the invention, such as will enable others skilled in the art to which it appertains to make and use the same.

This invention relates to new and useful improvements in railway locomotive springs of the class commonly known as semi-elliptic springs.

The invention has for its object to produce a spring which will embody the requisites of strength and durability, and which will be especially simple in construction and emcient in operation.

The invention has further for its object to produce a spring which will positively insure the leaves comprising said spring and the spring proper against longitudinal displacement and afford a bearing in the band for said spring on all sides of the same.

Further objects and advantages of my i11- vention will appear in the following description, and the novel features thereof will be more particularly pointed out in the claims.

The above-mentioned objects are attained by the means illustrated in the accompanying drawings, in which like figures of reference indicate like parts, and in which- 7 Figure 1 represents a central longitudinal section of my spring and the retaining-band surrounding the same and the saddle or bolster upon which the said spring and band rest. Fig. 2 is a similar view with the spring proper in elevation and in the position the spring assumes when loaded; and Fig.3 represents a central transverse section of my improved spring, band, bolster, and means for retaining the spring in proper position, taken on line w 03 of Fig. 1.

Referring to the drawings, the numeral 1 indicates the spring proper, which is composed of a series of ordinary leaves or leafsprings, increasing in length from the bottom to the top, and the top leaf at its extremities is provided with bearings which are adapted to receive the link or other supporting or suspending connections.

and prevent the leaves from individual lon- 6o gitudinal displacement.

The retaining-band 3 is provided at-its upper inner side with a groove 4, which preferably passes from the edge of said band to a point at or a little beyond the center of the same. This groove is adapted to receive the upward-projecting teat which is provided at the center of the top leaf of the spring, for the purpose which will presently become appar cut. The band 3' is provided at its lower side with ahole 5 for the reception of apin 6, which serves, when the leaves of the spring are placed together and put in position in the band, to fit into the recess in the lower leaf, thus serving to set or lock the spring securely 7 5 in said band and positively prevent longitudinal displacement of the spring proper or any of its individual members.

By constructing the leaves with the teats or projections on the upper side thereof it will be apparent that the teat upon the uppermost leaf will be in a position, when the leaves are placed together and ready to be placed in the band, to enter the groove 4 and be pushed forward until the projection 2 on said leaf is directly over the point of the pin or bolt and at the end of said groove when the pin'or bolt is moved upward, thus setting and locking the spring proper in position.

The groove 4, as shown in Fig. 3 of the 0 drawings, is of such width as to just receive the teat upon the uppermost leaf of the spring. Thus it will be seen that the surface of said leaf will be brought in close contact with the upper inner surface of the retaining-band 5 and insure a bearing for the entire surface of said leaf except for a space corresponding to the width and length of the groove.

Bymy construction I am further enabled to provide a spring having leaves ofthe same area in cr0ss-section, adding greatly to the strength of springs of this character, and which will not be weakened by thinning the leaves at the points where the teats are formed,

as is customary in springs of this class Where it is desired to do away with bearing-plates which are kept normally pressed upon the uppermost member or leaf of the spring by means of adjusting-screws or the like.

Having thus fully described my invention, What I claim, and desire to secure by Letters Patent, is

1. A semi-elliptic spring comprising the combination of a series of leaves having teats or projections struck upon their upper sides, and a band for retaining said leaves provided with a groove adapted to receive the teat or projection on the upper side of the top leaf of the spring, and means for holding the spring proper and its constituent leaves or members in locked position in the band, substantially as described.

2. Ina semi-elliptic spring, thecombination of a series of leaves having teats or projections on their upper side and a band grooved as described for retaining said leaves, and

. means for locking the spring proper against longitudinal displacement, said means consisting of a pin or bolt passing through the lower portion of said band and into the recess in the lower leaf of the'spring, substantially as and for the purpose described. 3. In a device of the character set forth, the combination with a band having a groove in the inner side of the transverse portion thereof extending about half-Way through the Width thereof, of a series of leaves having teats or projections struck upon their centers, the teat or projection on one leaf adapted to rest in the depression of the adjacent leaf, and the teat or projection of the last leaf being adapted to rest in the groove in the band, means for locking the concrete spring in the band, substantially as described. In testimony whereof I aflix my signature in presence of two witnesses.

JOHN BU'CKLEY. Vitnesses:

W. R. MAY, W. I. McSWEENv.

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