US719000A - Bolster-spring. - Google Patents

Description

'No. 719,000. PATENTED JAN. 27, 1903.

N. HALVORSEN. BOLSTER SPRING.

APPLICATION FILED OUT. 27, 1902. N0 MODEL.

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NELS IIALVORSEN, OF STOUGHTON, WISCONSIN.

BOLSTER-SPRING.

SPECIFICATION forming part of Letters Patent No. 719,000, dated January 2'7, 1903.

Application filed October 27, 1902. Serial No. 128,949. (No model.)

To aZZ whom it may concern.-

Be itknowu that LNELS HALVORSEN, a citizen of the United States, residing at Stoughton, in the county of Dane and State of Usconsin, have invented certain new and useful Improvements in Bolster-Springs; and I do 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, reference being had to the accompanying drawings, and to the figures of reference marked thereon, which form a part of this specification.

This invention relates to vehicle-springs, and especially to bolster-springs for wagons.

The object of the invention is to provide a spring of this class with devices or attachments which will prevent the body of the vehicle from sagging on one side when the load is heavier on that side than on the other. The spring and its attachments are so arranged that the body of the vehicle will be depressed evenly on both sides no matter where the load happens to be placed. This relieves the driver from the necessity of carefully stowing the load so as to distribute the weight evenly over the entire body and also pre vents the body from swaying downward on one side undera sudden lurch of the vehicle. I accomplish this by attaching equalizing-levers to the bolster, the top or hearing bar, and the interposed spring, as hereinafter more fully set forth, and particularly pointed out in the claims.

In the accompanying drawings, Figure 1 is a side elevation of a bolster-spring embodying my improvements. Fig. 2 is a top plan View of the same, and Fig. 3 is an end view.

The bolster proper, 1, has at each end the usual standards 2 to guide the top or hearing bar 3 and confine the body of the vehicle. At each end of the bolster is a shackle at, in which are pivot-ally secured the ends of the lower member of the spring proper-such, for instance, as the main and truss springs 5 6- in accordance with the construction shown and described in my Patent No. 710,969, dated October Il, 1902. The upper member 7 of the spring is secured to the middle of the lower member by the clip 8, its ends being received in loops 9, depending from castings 10, attached to the ends of the bearingbar and having ears 11 engaging with the standards 2.

Pivotall y attached to each shackle and running to the casting at the opposite end of the bearing-bar is a lever 12. The connection with the casting 10 is by means ofa stud 13 and slot 14 to permit the bearing-bar to play freely up and down. The leversare fastened at an intermediate point to the clip 8, which secures together at their middle points the upper and lower members of the spring. The levers preferably stand out of line with the bearing-bar, so that the'latter can move up and down between them, as shown in the drawings; but thisis not an essential arrangement. Moreover, instead of using only one spring, as shown, I may use two parallel springs, as is common in devices of this kind, and apply my equalizing-levers thereto in a manner so obvious thatit does not need illustration.

In operation the levers transmit to the middle of the spring any load applied at any point on the bearing-bar, so that the spring will be depressed evenly and not at one end only in case the load is not well distributed. The result is that the bearing-bar always preserves its parallelism with the bolster and the body of the vehicle will not sag or tilt to one side under an uneven load or under a sudden lurch.

Having thus described my invention, what I claim is- 1. The combination with a bolster and bearing-bar, of a spring interposed between them,and equalizing-levers connected respectively to opposite ends of the bolster and the bar, and both connected at an intermediate point with the middle of said spring.

2. The combination with a bolster and bearing-bar, of a shackle at each end of the bolster, a spring having a lower member secured to said shackles, and an upper member secured to the lower member at its middle, castings on the bearing-bar receiving the ends of the upper member of said spring, and equalizing-levers pivoted to said shackles and connected with said castings, and fastened to the middle point of said spring.

In testimony whereof I affix my signature in presence of two witnesses.

NELS HALVORSEN.

\Vitnesses:

H. A. HUBER, GEO. R. MOMANUS.

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