US898043A - Shock-absorber for vehicles. - Google Patents

Description

No. 898,048. PATENTED SEPT. 8, 1908.

' O. K. POSTER.

SHOCK ABSORBER FOR VEHICLES.

APPLICATION FILED JUNE 12, 1007.

anucufoz Char/es K. Fasver, @Vdnzaam anon asw/ wf I CHARLES K. FOSTER, OF OENTERVILLE, RHODE ISLAND.

SHOCK-ABSORBER FOR VEHIGLEs.

Specification of Letters Patent.

Patented Sept. 8, 1908 Application filed. June 12, 19.07. Serial No. 378,557.

To all whom it may concern:

-Be it known that 1, CHARLES K. Fos'rnn, a citizen of the United States, residing at Centerville, in the town of Warwick, in the county of Kent and State of lthode Island, have invented certain new and useful Im rovements in Shock-Absorbers for Vehic es, of which the following is a specification, referencebeing had therein to the accompanying drawing.

This invention relates to shock absorbing devices and has for its object to provide a simple and efl'ective means to be used in connection with vehicle springs whereby the shock caused by the unusual vibration of said springs may be absorbed or taken up to relieve the unusual tension on the same.

Springs which are used to support the body of the vehicle must of necessity be quite. light and flexible in order to provide an easy riding carriage, and while running rapidly over a rough road, on account of their flexibility, they receive undue strains and are liable to be broken.

My improved deviceis attached to the vehicle between the body portion and the axle to assist in supporting said body and serves as a cushion to retard any sudden compressions or extensions. of the spring, and effectually absorb the unusual shocks and strains to avoid the breaking of the s rings, thereby controlling the motion of the ody and insuring a regular and easy movement of the same.

A special feature of this invention is that the cylinder is set on an an outer end of the piston rod at the opposite end of said cylinder is secured to the body }portion of the vehicle, each of said ends being old by a ball and socket joint.

By setting this cushioning device on an angle a double eilect is obtained, first it assists the springs in receiving the shocks and jars of the endwise movement of the body on the axles, and also assists the spring to absorb the unusual shocks and strains in a vertical direction.

In the operation of my device I use a double acting air cushion which is obtained by a piston reciprocating in a cylinder, an

essential feature of this construction being the special m'e'anssby which the cushion at both ends is controlled.

It is found in practice on automobiles and the like, that where the outside air is admitted to the cylinder the dust and dirt le, one end of the same being secured near the axle while the works in around the reciprocating piston,

uickly cutt ng the same out and rendering he'device zseiess, but with my improved construction the air is hot forced from and drawn into the cylinder by the stroke of the piston but is simply passed from one side of the piston around to the other through a special channel arranged for that purpose, the amount to be passed being nicely controlled by the size of the apertures which is determined by the position of the adjusting screws.

This invention is fully set forth in this specification and more particularly pointed out in the appended claims.

In the accompanying drawings: Figure 1 is a side elevation showing my device in position between the axle and the body of the vehicle. Fig. 2 is a sectional elevation .of my improved device.

Referring to the drawings, at 1 is shown a portion of a semi-elliptic spring, clamped together at 2, said clamping means being also arranged to secure a socket 3 in which the ball at the lower end of the shock absorbing device is held. The vehicle frame is illustrated at 4 to which is secured a bracket 5 in which bracket is held the ball at the upper end of said device.

This device is constructed of a cylinder 6 provided at either end with the ends 7 and 8 the latter having inwardly extended flanges 7 which are threaded onto the cylinder. The piston 9, which is adapted to reciprocate in said cylinder, is rovided with suitable packings 10 and 11 hy which to make the same tight while working both ways in said cylinder. v

At 12 is a piston rod which is provided with a ball 13 at its outer end adapted to be held in the bracket 5. The opposite end of this rod is passed through the packing box 14 and through the piston 9 where it is secured by means of the nuts 1515.

In the working of an ordinary. piston back and forth ina cylinder valves are ordinarily provided which would automatically close onthe compression side of the cylinder and open 'on the opposi is' In this way dirt and dust would bi drawn into the cylinder with the air and soon'destroy the usefulness of the device. In order to avoid this very serious dii'liculty I have provided a channel 16, having ports 17 and 18 leading into Said cylinder, which allows the air to pass; from one side of the piston around to the other side through said channel and be used over and adapted over again as the piston reciprocates. In order t at the amountallowed toipass from one end to the other may be varied'under difierent'conditions in which the deyice may be called upon to operate I have pravided the screws 19 and 20, the points of which are opening therethrough, thus the quantity of air. allowed to pass from one end to the other is nicely" controlled. Channel 16, is formed by aplate 16", which is transversely-curved and has its ends 16'', at right angles thereto extending inwardly and conforming in shape to the curvature of c linder 6', to which, between fian es 7, sai ends are secured. At

' ends of sai plate are enlarged parts or bosses sorb theshock of the 'endwise movementoof the'vehicle body on the axle as well as to steadythe vertical movement of ,the same.-

Bfy the use of these ball joints at either end 0 the device the movement of the same is universal and will readily follow any movementof the body without cramping.

A articular advantage obtained by the use 0 the two adjusting screws '19 and 20 is that one may be withdrawn to openits port while the other is forced in to nearly close the other passageway whereby the channel 16,

which may be as large as desired may be usedas an extra or enlarged air space or aux- I iliary chamber into which the compressed air from one side of the piston may be forced,

to enter said ports and regulate the side of the same.

1, between the axle an the frame where y the device will ab seams thereby increasing the areaand diminishing I the resistance on one side of the piston, at

the same time reducin the areaby confining the air'in that end oft e cylinder lad increase the-resistance on this side of the piston,---,

In practice it is found "advant sons in some cases in riding-over rough ro'a s to al low the'body of the car to descend withoiit much resistance, and then'retard the same in rising, which result can be obtained to a very satisfactory de ee by nearl closing the inlet on one side of t e same entirely open an free on the opposite The device is exceedingly simple ofconstruction inexpensive to' produce, and very 1 efiective. in its operation; and by its practical construction no dirt or dust can enter the cylinder to. affect its working parts.

Having thus-described my invention, what I claim as new and desire .to secure by Letters Patent,-is: v

I A shock absorber composed of a c and a piston therein, sa d cylinder aving ends provided; with "inwardly extending flanges interiorly. threaded and secured to the cylinder, a plate transversely curved anddisosed between said flan es, said plate havlng right angular-ends w i ch are curvedmnd secured to said cylinder, enlarged portions at each end of said plate, each of which is aper- -65 linder tured, and a screw in'eah of said apertures,

the wall of said cylinder adjacent said plate bein formed with openings alining' with said openings of the plate and adapted'to receive said screws therein.

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

CHARLES K. FOSTER.

- Witnesses:

Howann E.-BARLOW, E. I. OGDEN.

iston an leaving the 5b

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