Liquid-sealed type of a governor for telephone dial
AssigneeKyung Hwan Cheong
InventorKi W. Song
Life of this patent
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Abstract
An improved governor device for a telephone dial which includes a rectangular hexahedral chamber provided with a rack engaged with a pinion and a cylindrical chamber provided with a piston secured to said rack at one end and having a valve system. The two chambers are filled up with a certain liquid such as silicone oil in order to afford a resistance to the piston. The piston can move either way upon dialing and at this time due to the resistance from the liquid the piston can reciprocate without any noise within a certain interval.
Claims1
In combination with a telephone dial and return spring therefor, a liquid-sealed type of a governor which is comprised of:
- (a) a rectangular hexahedral chamber in a liquid-sealed body, said chamber including a pinion engaged with a rack disposed in a recess formed on one of the vertical side walls of said chamber whereby said rack can move reciprocably, said pinion being operatively secured to said dial through the lower end of the axis extended downwardly from the dial plate of said telephone dial;
- (b) a cylindrical chamber directly connected to said rectangular hexahedral chamber, said cylindrical chamber including a piston dividing the same into two sub-chambers, said piston being secured to said rack at one end thereof and having a small hole at the lower part thereof and said piston including a circular resilient plate having a small hole at the center part thereof and said plate being bent at its peripheral edge and fixed to a circular compressive plate whereby said small holes permit communication between said sub-chambers;
- (c) a closure at one side of said body;
- and
- (d) a liquid inlet at the opposite side of said body.
Dependencies are inferred from the claim text.