US1674548A

US1674548A - Means for controlling spring resistance

Info

Publication number: US1674548A
Application number: US626550A
Authority: US
Inventors: Albert F Hegenberger; George P Luckey
Original assignee: Individual
Current assignee: Individual
Priority date: 1923-03-21
Filing date: 1923-03-21
Publication date: 1928-06-19
Anticipated expiration: 1945-06-19

Description

June 19, 1928. 1,674,548

A. F. HEGEN BERGER ET AL 4 MEANS FOR CONTROLLING SPRING RESISTANCE iii-led March 21, 1925 Patented June 19, 1928.

UNITED STATES PATENT OFFICE.

I j ALBERT r. HEGENBERGER Annenoneri r. LUCKEY, or DAYTON, 01110.

MEANS FOR CONTROLLING spams RESISTANCE.

Applicationfiled March 21, 1923. Serial No. 626,550.

This invention relates to a mechanical device for controlling the resistance of a'spring or the equlvalent of a spring.

The object of the invention is to provide a mechanical device which will decrease the force required to compress or stretch a spring or a system containing one or more springs, or in other Words, a device which will neutralize to any desired extent, the force of a spring or system of springs or any other part or parts acting in the nature'of a spring or springs. j

A further ob'ect of theinvention is to provide a IIIQChtUIlCiLlClGVlCG of the nature re ferred to by means of which the resistance of a spring or its equivalent may be controlled.

with the aid of toggle links or levers, or one or more springs or the equivalent thereof, acting to neutralize to the desired extent the force or tension of the spring or springs.

With the above and other objects in View the invention consists in the novel construction, combination and arrangement herein described, shown and claimed.

In the accompanying drawings Figures 1, 2 and 3 are plan views showing one form of means for controlling the resistance of a spring. 7

Figures 4, 5 and 6 show other means for accomplishing the same purpose but'involving the same principle.

Referring first to Figures 1, 2 and 3, 1 designates a spring whose force it is desired to control or neutralize to any desired extent. The spring 1 is fastened to-a pivoted arm 3 at the free end thereof at the point 6. The

, arm 3 is mounted pivotally on any suitable support at i. A neutralizing or controlling spring 2 is anchored at the point 5 and is con nected to the point 6 of the arm 3. When the spring 1 is in its neutral position or, in other words, neither compressed norexpanded, the arm 3 stands at a right angle to the spring 1 and the spring 2 in an extended or stretched condition passes from the point 6 along the direction of the arm and in line with the pivot 4; to the anchorage point 5-.

The force on the arm, due to the spring 2, pulls back on the point 6 directly in line with the pivot i, and therefore there is no tendency of the arm 3 to turn about its pivot 4. I

In Figure 2 the spring 1 has been extended and is now exerting a force in the direction from 6 to 7 where the spring 1 is anchored to a fixed point. In extending the spring 1 the arm?) has been moved so that the spring 2 is now tending to pull the arm 3 in, a counterclockwise direction. This causes a force at 6 in the direction from 7 to 6 and tends to neutralize the force of the springl pulling in the direction from 6 to- 7. For.

small angular motions of the arm 3 away from the neutral position shown in Figure 1,

- the force at 6 due to the action of the spring 2 opposing spring 1 is proportional to the amount that the spring 1 has been stretched. This opposing force may be increased or decreased by changing the strength of the spring 2. I V 3 In Figure 3. the spring 1 has been compressed and is now exerting a force in" the direction from 7 to 6'. In compressing the spring 1, the arm 3 has been moved so that the spring 2 is now tending to pull the arm 3 in a clockwise direction. This causes a force at 6 in the direction from 6 to 7 and tends to neutralize the force of the spring pressing in the direction from 7 to 6. For small angular motions of the arm 3 away from the neutral position shown in Figure 1, the force at 6 due to the action of the spring 2 opposing the spring 1 is nearly proportional to the amount that the spring 1 has been compressed. This opposing force can be increased or decreased by changing the strength of the spring 2.v 7

Another mechanical device to carry out the same principle and-obtain similar results is shown in Figures 4, 5 and 6, in which the spring 1 whose force it is desired to neutralize or control, is anchored at 7 and attached at 6 to the pivotal connection between two toggle links or levers 3 and 4;, which are tended and compressed. In each case the force in the direction of. the spring 1 at the point 6 due to the action of the spring 2 is opposite in direction to the force exerted by the spring 1. By changing the strength of the spring 2 the force exerted by the spring 1 may be neutralized or controlled to any desired extent.

The two plans above described and shown in the accompanying drawings are examples force of a spring in the-flexible diaphragins v of various instruments, as for example, in a metallic bellows which is used as a diaphragm and has a rather stiff action inherent in its construction. Again, in aneroid barometers and the like, a stiff spring is introduced to prevent the diaphragm from collapsing due to pressure of air. The effect of these stiff springs is to allow only a small expansion when the pressure is raised or lowered. By introducing a spring having negative characteristics, the effect of the stifl' springs necessary to prevent the collapse of the diaphragm is neutralized and any desired change in expansion or contraction for emme a given change in atmospheric pressure may be obtained.

We claim:

1. In combination with a spring, means for controlling the resistance of said spring comprising a pivoted element to which said spring is attached, and a counter spring also attached to said pivoted element and arranged to act with progressively increasing force in opposition to the progressively increasing resistance of the first named spring.

2. In combination with a spring having one end thereof anchored, means for controlling the active resistance of said spring comprising a pivoted element having the active portion of said spring attached thereto at a point distant from the pivot thereof, and a counter spring anchored at one end and having the active portion thereof connected with said pivoted element at a point distant from the pivot thereof and arranged to act with progressively increasing force in opposition to the progressively increasing resistance of the first named spring. I

In testimony whereof we aflix our signatures. V

ALBERT r. HEGENBER-GER. GEORGE P. LUGKEY.