Pressure responsive switch
AssigneeKabushiki Kaisha Saginomiya Seisakusho
InventorsTakeshi Odashima, Tsutomu Saito
Life of this patent
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Abstract
A pressure responsive switch in which a bellows abuts against a leaf spring at substantially the same point where a switch actuating rod abuts against the leaf spring. Within the casing, the bellows is attached to a first inner end and a switch section is provided at a second inner section. The actuating rod extends in a direction of the bellows expansion between said bellows and the switch section. A first end of the rod is positioned opposite the bellows. The leaf spring is interposed therebetween to counteract the bellows expansion and exert balanced force to the actuating rod.
Claims8
A pressure responsive switch comprising:
- a casing having a first inner end and a second inner end;
- a bellows provided within said casing at said first inner end having an opening to receive air pressure changes from outside the casing for expansion of said bellows within the casing;
- a switch section provided within the casing at said second inner end;
- an actuating rod longitudinally extending in an axial direction of said expansion of the bellows between said bellows and said switch section, and having a first end axially aligned with and substantially opposite said bellows and a second end to operate the switch section;
- and
- resilient means through which said rod extends for resiliently counteracting said expansion of the bellows to exert balanced force on the actuating rod in cooperation therewith, and means actuated by said actuating rod to cause operation of a switch in said switch section.
Dependencies are inferred from the claim text.