Radiant energy – Photocells; circuits and apparatus – Photocell controlled circuit
Patent
1985-12-12
1987-06-09
Nelms, David C.
Radiant energy
Photocells; circuits and apparatus
Photocell controlled circuit
H01J 3150, H01J 4015
Patent
active
046721940
ABSTRACT:
A circuit for automatically removing battery power from a night vision goggle (10) upon its detachment from a headgear (12). A magnet (34) on the headgear (12) is magnetically coupled to a magnetic reed switch (36) fixed to the goggle (10). On detachment of the goggle (10) from the headgear (12), the reed switch (36) switches battery current to a capacitively coupled coil (52) of a bistable latching relay (K1). Relay (K1) contacts (56, 62) are disconnected thus removing power from the image intensifier tube (40). On reattachment of the goggle (10) to the headgear (12), the On-Off switch (18) is cycled to pulse latching Relay K1 coil (64), thereby establishing a current path to the tube (40).
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Broyles Thomas E.
Kastendieck William A.
Chauza Roger N.
Mills Jerry W.
Nelms David C.
Oen William L.
Varo Inc.
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