US748512A - Bearing-plate for springs. - Google Patents

Description

PATENTED DEC. 29, 1903.

0; A. LINDSTRUM. BEARING PLATE FOR SPRINGS.

APPLICATION FILED OUT. 11, 1902.

N0 MODEL.

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UNITED STATES Patented December 29, 1903.

PATENT OFFICE.

BEARING-PLATE FOR SPRINGS.

SPECIFICATION forming part of Iletters Patent No. 748,512, dated December 29, 1903.

Application filed October 11,1902. Serial No. 126,937- (No model.)

To all whom it may concern.-

. Be it known that I, CHARLES A. LiNns'raoM, a citizen of the United States,and a resident of Allegheny, Allegheny county, Pennsylvania, have invented certain Im provements in Bean ing-Plates for Springs, of which the followbeing had to the accompanying drawings, in-

which 7 Figure 1 is a view illustrating my invention as applied to a reinforcingsprin g of the character shown in my Letters Patent No. 687,692, dated November 26, 1901. Fig.2 is an enlarged view of part of the end of the spring and of the hanger with its key and interposed bearing devices, and Fig. 3 is a view illustrating the application of my invention to the ordinary form of spring-hanger.

In Fig.1 of the drawings part of the frame of a locomotive, one of the axles, and'one of the axle-boxes are shown in dotted lines in connection with a semi-elliptic spring 2, reinforcing-spring 3, and hangers 4:, as in my previous patent, before alluded to, the keys 6 of the hangers bearing upon the ends of the supplementary or reinforcing spring 3, which in turn bear upon rockers 5, as in said patented structure. If these rockers bear directly upon the upper leaf of the spring 2, the strain is so concentrated upon a limited area of the spring that breakage of the latter frequently results even if the end portion of the spring is reinforced by turning the upper leaf back upon itself or swaging a thickened seat thereon,and such breakage renders the spring useless. In order to overcome this objection,

I interpose between the rocker 5 and the upper leaf of the spring a shoe 10, preferably recessed in its upper face for thelreception of the rounded lower bearing of the rocker and having a lower face which provides an extended bearing upon the upper leaf of the spring, thereby distributing the strain throughout the entire end portion of the spring and preventing the breaking of the latter under heavy loads.

In order to longitudinally lock the shoe 10 to the upper leaf of the spring, the end of said leaf is bent upwardly, so as to forma lip 11, which enters a slot 12, formed in the under side of the shoe, as shown in Fig. 2, and thus prevents any longitudinal movement of the shoe in respect to the spring.

In Fig. 3 Ihave illustrated the application,

of my invention to an ordinary form of spring construction, the key 6 of the hanger in this case bearing directly upon the shoe 10 and the supplementary reinforcingspring and its rocker being dispensed with.

In case of breakage of the shoe or injury to the same said shoe can be readily replaced, the spring itself not being impaired.

When the end portion of the spring is slotted for the passage of the hanger-bar 4, the shoe 10 will be likewise slotted, as indicated by dotted lines in Fig. 2.

Having thus described my invention, I claim and desire to secure by Letters Patcut-- The combination of the semi-elliptic spring provided with vertical slots through its end portions and having the ends of its long leaf formed with a vertical offset extending across the leaf, bearing-plates placed on the end portions of said leaf and provided with transverse grooves extending through the sides of the plates and with slots coinciding with the slots in the leaf, and hangers passing through said slots, as set forth and shown.

In testimony whereof I have signed my name to this specification in the presence of two subscribing witnesses. n

CHARLES A. LINDSTROM.

Witnesses:

A. Simon, J. O. LANGFITT.

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