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US 4,396,969 AGranted
Gas tube protector module
AssigneePorta Systems Corp.
InventorMichael Fasano
Life of this patent
Estimating the term…
Abstract
An improved gas type telephone protector module in which the firing of a heat-sensitive means causes a slidably mounted ground plate to bypass in both circuits to the flow of excess current and/or voltage surges to ground. Means are incorporated to provide a secondary air gap which becomes operative upon the failure of either chamber of the gas tube.
Claims4
A gas tube type protector module for protecting a telephone circuit from excess current or voltage surges comprising:
- an insulative housing element, a pair of tip and ringing contact elements, a grounding pin assembly, a heat-sensitive element, and a gas tube element;
- said contact elements each including a pair of interconnected contact members communicating externally of said housing to a circuit to be protected, and an elongated generally longitudinally extending strip interconnected to said pair of contact members, said strip extending substantially the length of said housing to form a wall at a rearward end thereof;
- said grounding pin assembly including a grounding shaft, one end of which is adapted to communicate with a source of ground potential externally of said housing element, and a second end of which connects with said gas tube element, a transversely extending ground plate mounted upon a medial segment of said shaft for sliding movement therealong between first and second positions, in a second position of which said ground plate contacts a surface of said wall to establish electrical communication therewith;
- and resilient means urging said ground plate to said second position.
1 more element
Dependencies are inferred from the claim text.