US655210A - Elliptic spring. - Google Patents

Description

Patented Aug. 7, |900.`

No. 655,2l0.

' C. l. DUPONT.

ELLIPTIC SPRING.

(Application led 22, 1900A (No Model.)

NVENTOR W/NEssEs 1 Nonms Perses co Mmm. r mom. n. c,

' UNITED STATES,

.PATENT Orr-ion.

CHARLES i. DUPONT, or ,rLAoUEMiNn LOUISIANA.

SPECIFICATION forming part of Letters I atent No. 655,210, dated August 7, 1900. Application iled MarohZZ, 1900. Serial Ilo. 9,713. (No model.)

Be it knowntli'at I, CHARLES I. DUPONT, a citizen of the United States,residing at Plaquemine, in the parish of Iberville and State of Louisiana, have invented a certain new and useful Elliptic Spring, of which the following is aspeciiication, reference being had therein to the accompanying drawings.

This invention relates to elliptic springs; and the object in view is to provide simple and eective means for connecting the eX- tremities of the leaves of an elliptic spring in a manner which will securely couple the saine together and at the same time prevent any wear from coming upon the bolts which unite the leaves at their extremities.4 `By re` moving wear from the securing-bolts the life and durability of the spring as a whole are greatly increased. This result is accomplished without detracting in any way from the appearance of the completed spring.

The detailed objects and advantages of the invention will appear in thecourse of the ensuing description.` v

The invention consists in certain novel features and details of construction and arrange-` ment of parts, as hereinafter fully described, illustrated in the drawings, and incorporated in the claimi V In the accompanying drawings, Figurel is a perspective view of an elliptic springcon` strueted in accordance with the present in vention. Fig. 2 is an enlarged detail vertical longitudinal section through one end of the spring, taken transversely of one of the end bolts. Fig. 3 is a transverse, section taken through the spring longitudinally of one of the bolts, showing the bolt in elevation. Fig.

4 is a detail perspective view of the terminala,

portion of one of the leaves. Fig. 5 is a similar view of the headless ferrule.

Similar numerals of reference are employed to indicate corresponding parts in all the iigures of the drawings.

The spring contemplated in this invention comprises a pair of leaves l, curved reversely to each other, as clearly shown in Fig. 1, and resting in contact with each other Y at the points 2, these contacting-points forming rockerbearings for the spring sections or leaves. Beyond the bearing-points 2 the extremities of the leaves are reversely curled or rolled to form half-sleeves 3, which together,

form a split cylindrical sleeve, a space 4 being left between the Vextreme `edgesof the half-sleeves, so as to insure the leaves comin g in contact with each otherA at the points 2.

rEmbracing the half-sleeves l3 is a ferrule 5 in the form of a split or incomplete cylinder, the internal diameter of which is approximately the same or slightly greater than the external diameter of the half-sleeves 3, the edges 6 of the ferrule being spaced apart sufficiently to admit the rocker-bearing portion of the leaves at the points 2. The ferrule 5 is ooextensive `in length with the half-sleeves 3, so that the corresponding edges of the half-sleeves and ferrule lie iiush with each other. A retaining-bolt 7 passes through the opening formed bythe half-sleeves 3 and is provided with a head 8 of the same diameter as the ferrule 5 and adapted to bear against the adjacent edges of the ferrule and half-sleeves. The bolt is screw-threaded at its opposite end to receive a nut 9, which may be screwed up against the adjacent edges of the half-sleeves and ferrule, or, if preferred, a washer 10, of any suitable material, may be interposed between the nut 9 and halfsleeves 3 and ferrule 5. llrei'erably the nut 9 and washer 10 do not exceed in diameter the diameter of the ferrule 5, thus obviating any projection.

f From the foregoing description it will be 'seen that the terminal portions of the leaves `l lie i n rocking contact with each other bethereon. 'lhe durability or the spring as a whole is thus materially increased, and at the same time a neat terminal point for the spring is provided.

Having thus described the invention, what is claimed as new is-f- An elliptic spring comprising leaves, the

IOC

extremities of whichl are reversely curled.' or y bearingAA against the open ends of the ferrule rolled to form half-sleeves whielrbearagainst and haulfsleeves5y substantially as? specified. 1o each other at their point of junction with In testimony whereof I ax' mysignat`ure the leaves proper, a. cylindrical and headless in presence of two witnesses. Y

5 split ferrule removably fitted upon the half- CHARLES I. DUPONT.

' sleeves and coextensive therewith, a headed i Witnesses;

bolt passing through the half-sleeves, and aA i I. M. W1LLI'Als'frsl, retaining-nut thereon, the bolt-head and nut l T. E. HUBBARD.

Images