Electricity: measuring and testing – Conductor identification or location – Inaccessible
Patent
1987-04-01
1989-05-09
Eisenzopf, Reinhard J.
Electricity: measuring and testing
Conductor identification or location
Inaccessible
324502, 324 65P, G01R 2708, G01R 3100
Patent
active
048292354
ABSTRACT:
A four-terminal electrical connector device (40) for testing and measuring unknown resistances of initiators (11) used for starting pyrotechnic events aboard a Space Transportation System. The testing device minimizes contact resistance degradation effects and so improves the reliability of resistance measurement taken with the device. Separate and independent voltage sensing (19) and current supply (20) circuits each includes a pair of socket contacts (13-16) for mating engagement with the pins (17,18) of the initiator. The unknown resistance that is measured by the device is the resistance of the bridgewire (23) of the initiator which is required to be between 0.95 and 1.15 ohms.
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patent: 2543754 (1951-03-01), Beach
patent: 3045080 (1962-07-01), Frantz et al.
patent: 3108843 (1963-10-01), Frantz
patent: 3200355 (1965-08-01), Dahlen
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patent: 3689830 (1972-09-01), Caldwell et al.
patent: 3772545 (1973-11-01), Hatschek et al.
"Increased Accuracy of Squib Bridgewire Measurements Using a 4-Contact 2-Pin Connector", Hoffman, III, William C., pp. 307-311. Eleventh International Pyrotechnics Seminar, Vale, Colo., Jul. 7, 1986.
Graves Thomas J.
Hoffman, III William C.
Robinson Robert L.
Eisenzopf Reinhard J.
Fein Edward K.
Harvey Jack B.
Manning John R.
Schlorff Russell E.
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