US173719A - Improvement in vehicle-springs - Google Patents

Description

I A. T. FREEMAN.

VEHICLE-SPRING. I

Patented :Feb. 22 18'76.

WM j M332 N. PETERS, PHOTO-L THOGRAPNER WASMNGT N AUSTIN T. FREEMAN, OF

PATENT QFFICE,

HERKIMER, NEW YORK.

IMPROVEMENT IN VEHlCLE-sPRlNGsi Specification forming part of Letters Patent No.1 73.719, dated February 22, 1876; application filed January 24, 1876.

To all whom it may concern:

Be it known that 'I, AUSTIN T. FREE- MAN, of Herkimer, in the county of Herkimer and State of New York, have invented a new and useful Improvement in Springs for Carriage-Bodies and their Seats and I do hereby declare the following to he a full, clear, and exact description of the'same, reference being bad to the accompanying drawings, forming a part of this specification, in which- Figure 1 represents a perspective view of myinventionapplied to a wagon body and axle, the spring being shown open or expanded; and Fig. 2, a longitudinal vertical section of the same applied to the seat of a'carriage, showing the spring depressed.

The object of my invention is twofoldfirst, to provide a spring simple in construction, and capable of supporting itself under extremely heavy weights, in such a manner as to lessen the danger of breakage from too a great pressure, and alsoto prevent the bumping orjarring motion which is usual when the ordinary springs are used, caused by the spring striking suddenly against .an unyielding or unresisting surface second, to provide aspring constructed in such a manner as to retain the seat or carriage-bed underneath which it is placed always in a position horizontally above it, whether the weight be in the center above the sprin g, or over either of the extreme ends thereof.

The nature ofmy invention consists in the combination and'arrangement of one-half of an ordinary elliptical spring with a springbar and levers appliedunderneath the spring, as hereinafter setvforth.

In order that others skilled in the art may be enabled to make and use my invention, I will now proceed to describe the same with reference to the drawings.

A represents a spring, corresponding in form to the upper or under half of the elliptically-shaped springs in ordinary use, and which is bolted fast at its center in the ordinary manner to the under side of the spring-bar B. This spring may be composed of as many leaves orrthicknesses of metalas is deemed necessary in order to give the required degree of resistance, and so as to properly adapt it for use as a carriage body or seat spring, as the case may be. The spring-bar B is provided upon its ends with downward projections or lugs B B, and to the lower ends'of these projections are pivoted at a a the outer ends of levers G .O, the upper surfaces of which serve as bearings for the free ends of the spring A to rest upon. These levers are loosely joined together at their inner ends by a pin, a, and

are pivoted near their respective centers, as shown at b and b, to guide-jaws O (),in such manner that their ends are capable of moving vertically up and down. The jaws G G, between which the levers are pivoted by the pins 1) b,'are firmly bolted or otherwise fastened to the sand-bar D, Fig. 1, of an axle-tree,

or, when applied to a carriage-seat, to a bed, 1), of a wagon or carriage body, (shown in Fig. 2,) and the levers are thus held secure from any danger of displacement and in order to have the inner ends of the levers capable of risingabove or descending below a horizontal plane, short slots (1 d are made in one of the levers and one of the jaws, 'as shown. -The joint a between the levers comes directly under the cent-er of the spring A, and the ends of the spring bear upon the levers at points outside their fulcra, and thus, when the weight upon the carriage-body is great enough to bear down the spring, this Weight depresses the outer ends of the lovers, and thereby forces up the inner ends of the same until they meet the v word, the efi'ect of the arrangement shown and described is to keep the carriagebody or carriage-seat in a position parallel, or nearly so,

with the axles, and also save the spring from being broken by undue strain or weight. A spring constructed on the above plan could also be utilized for the purposes of a springbed, or for a railroad-car spring, as well as for carriages.

Having thus described my invention, what y claim, and desire to secure by Letters Patent, Witness my hand in the matter of my apis I r plicat-ion for patent for the above-described in- The carriage body 01' seat spring, consistvcntion this 8th day of January, A. D. 1876. ing of the spring-bar B, the levers O G, pivoted to the lugs 0f the spring-bar, and to jaws AUSTIN T. FREEMAN. G U, and the spring A, placed between the Witnesses:

spring-bar and the jaws, substantially as and R. O. WABBER,

for the purpose described. R. S. DOTY.

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