US845088A - Vibration-check for vehicles. - Google Patents

Description

No- 845,088. PATENTED FEB. 26, 1907] P. M. HOTGHKIN.

VIBRATION CHECK FOR VEHICLES.

APPLICATION FILED JUNE 15. 1905.

W A W I fw PAUL M. I'IOTCI-IKIN, OF CHICAGO, ILLINOIS.

VIBRATION-CHECK FOR VEHICLES.

Specification of Letters Patent.

Patented Feb, 26, 1907.

Application filed June 15,1905. Serial No. 265,451-

To all whom it may concern:

Be it known that I, PAUL M. HOTGHKIN, a citizen ofthe United States, residing at Chicago, in the county of Cook and State of Illinois, have invented certain new and useful Improvements in Vibration-Checks for Vehicles, of which the following is a specification.

This invention relates to a device for check- ,ing the excessive vibration or oscillation of the body of a spring-supported vehicle resulting from the wheels passing over uneven places in the roadway.

The device is especially applicableto motor-vehicles which travel rapidly and in which the weight carried by the springs, together with the tension of the springs, causes continued vibrations of the vehicle-body,

which jolt and shock the occupants and remeet various. requirements in use, and which will not impair the efficiency of the vehiclesprings in the manner and to the extent that such sprin s are useful.

It is wel known that the action of the springs of a vehicle after being depressed in returning to their normal condition or position tend to throw outwardly or upwardly the object to which they are attached with a force measured by the expansive (or con tractile)capacity of the springs. The function ofthe springs as a cuslnon to relieve the occupant and vehicle from jars incident to the drop of the wheels when passing overan obstruction is desirable and should not be impaired; but the converse action, which impels the occupant upward, is undesirable, and the operation of my device is to check or neutralize this action without appreciably affecting the utility of the springs.

In the accompan ing drawings I have shown a preferred adaptation of the principles of my invention in the followingviews:

Figure 1 shows my device applied to the frame and springs of a vehicle, only portions of the latter being included. Fig. 2 is an elevation of the device with a portion broken away. Fig. 3 is a view, partly in section and partly in elevation, of my device with the cylinder-head removed and the piston shown in one position; and Fig. 4 is a view similar to Fig. 3, but shows the piston in a different position.

Referring to the details of the drawings, 1 represents a cylinder of cast metal formed with an extension 1 at the upper side, in which there is a chamber 1*. From one side of the chamber 1 a passage-way 1 leads to the interior of the cylinder, and in the bottom of the chamber is a valve-openin 1 which communicates with the interior 0 the cylinder. The upper end of the extension is closed by a screw-cap 2, which is formed with a central boss 2*, which extends part way down into the chamber 1". extends inwardly from the wall of the cylinder at a point between the port 1 and passage-way 1, said wall havin formed therethrough a tapering walled va ve-pol't 3 and terminating near the center of the cylinder with a curved foot 3 the concave face of which serves as a bearing for the piston, to be described. I

Arranged in the opening 1 is a checkvalve 4, which is formed with a central upwardly-extendingstem 4, and which, together with the lug 2*, serves as a guide for an expansion coil-spring 4 mounted thereon. The upper end of the spring bears against the cap 2 andthe lower end against the valve 4, so that the tension of the spring is normally exerted to force said valve on its seat at the openin 1.

Ava ve-plug 5 has a threaded engagement with the wall of the cylinder, is formed with a tapered inner end 5% which fits and con-' trols the port 3 and is provided at its outer end with a lock-nut 5". A hollow shaft 6 is arranged at the center of the cylinder and extends longitudinally therein. A piston 7, preferably of the form shownfis secured on the shaft 6 by a set-screw ,7, which also .7 A partition 3 serves to secure within said shaft 6 a solid shaft 8. The outer ends of the piston are in closefrictional contact withtheinner walls of the cylinder. The shaft "8 is suitably journaled at its inner end in the end wall of the cylinder and at its outer end in .a central boss 9 on the cylinder-head 9; Said shaft also passes through a cap 9 which is screwed on the boss 9 and has its outer end squared to receive one end of a rod 8*, which is secured thereon. The opposite end of the rod 8 is suitably pivoted on the frame 12 at a point directly above the center of the vehiclesprings 13.

The cylinder-head is formed with an extension 9", the end of which is pivoted on a block 10, which is secured to the center of the It will be under-- It will be noted that in a device constructed substantially as above described the act to return the valve to its seat.

cylinder, with its rigidly connected head and extension 9 and the shafts. 6 8, piston 7, and rod 8 form, in effect, two levers having a pivotal col-elation, the action of which is controlled by the liquid in the cylinder as it passes from one side of the piston to the other. It will also be observed that the valve-opening 1 is large and is controlled by a check-valve, which will be easily and quickly unseated by pressure from below, while the area of the opening or port 3 may be so reduced that the passage of the liquid therethrou'gh will be slow. From-these conditions it is apparent that when the piston moves from the position shown in Fig. 3 in the direction indicated by the arrow in said figure the liquid in the path of the piston will be forced through the port 1 and passage-way 1 into the cylinder on the opposite side of the partition 3 and thatsuch movement will be quick.

The device will be so arranged that the piston will make the movement just described when the axle drops or. in the downward movement of the vehicle-body. When the piston is in the position shown in Fig. 4 and moves in the direction indicated by the arrow, the upward pressure on the checkvalve will be withdrawn and the spring will the only outlet for the liquid under pressure from the piston will be through the contracted opening around the plug 5., so'that the return movement of the piston will be resisted by the liquid cushion, and. thus, serve to check the upward movement of the vehicle frame or body, which is connected with the Hence tension, as will be readily appreciated by one skilled in the art.

Though I'have shown a preferred construction-of my device, I do not wish to be limited to the details of same, as various modifications may be made without departing from the essential elements and principles of con struction and operation.

What I claim, and desire to obtain by Letters Patent, is Y 1.. In a device of the character described, a liquid-filled cylinder adapted to be connected with therunning-gear of a vehicle and having aeripheral extension with a liquid-passa e t erein, a radial partition-wall in said, cylinder having an opening therein, an osc1l lating piston mounted in said cylinder and adapted to be ivotally connected with the body of a vehic e and, with said partition, dividing the cylinder into two chambers in constant communication through said opening, a valve arranged in said passage and adapted to ermit the flow of liquid in one direction 3.1 an adjustable valve controlling said opening.

2. In a device of the character described, a

cylinder connected with the running-gear of a vehicle and having a liquid passage-way ar. ranged therein, a partition extending partially across said cylinder and having a port therein, an oscillating piston adapted to be pivotally connected with thebody of a vehicle, and with said partition dividing said cylinder into two liquid-holdin chambers, a yielding valve arranged in said passage-way, and an adjustable valve arranged 1n sald ort. p 3. An automatic checking device for vehicles, comprising a liquid-filled cylinder adapted to be connected with the running-gear of a vehicle, and having an extension provided with a liquid passage-wacommunicating with the interior of said cy inder, a valve arranged in said passage-way, a fixed partition extending part way across said cylinder and having a port therein, .an adjustable valve controlling said port, an oscillating piston mounted in said cylinder and together with said partition dividing the cylinder into two chambers, a shaft carrying said piston, and means ada ted to 'pivotally connect said shaft with t e body of a vehlcle.

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

' PAUL M. HOTCHKIN.

Witnesses: I

E. P. PALMER, F. BENJAMIN.

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