Passive proximity battery control circuit for night vision goggles
First Claim
1. A night vision goggle assembly, comprising:
- a headgear frame;
a goggle with an On-Off switch-controlled electrical circuit;
a bracket on said headgear frame for removable attachment of said goggle; and
circuit means responsive to the removal of said goggle from said bracket for automatically deactivating said electrical circuit.
6 Assignments
0 Petitions
Accused Products
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).
34 Citations
22 Claims
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1. A night vision goggle assembly, comprising:
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a headgear frame; a goggle with an On-Off switch-controlled electrical circuit; a bracket on said headgear frame for removable attachment of said goggle; and circuit means responsive to the removal of said goggle from said bracket for automatically deactivating said electrical circuit. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12)
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13. A circuit for use with a night vision goggle having a battery operated image intensifier, and detachably mounted to a headgear, comprising:
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an On-Off switch operative to selectively supply battery current to said image intensifier; magnetic coupling means between said goggle and said headgear; and magnetic responsive means responsive to the proximity of said magnetic coupling means for interrupting current through said switch when said goggle is detached from the headgear. - View Dependent Claims (14)
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15. A battery deactivating circuit for use with a night vision goggle removably attachable to a headgear, comprising:
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switch means for switchably connecting a battery to an image intensifier; and bistable means responsive to a first signal corresponding to the detachment of said goggle from said headgear for operating said switch means and disconnecting said battery from said image intensifier, and responsive to a different signal for operating said switch means and connecting said battery to said image intensifier. - View Dependent Claims (16, 17, 18)
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19. A night vision goggle assembly, comprising:
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a night vision goggle; a headgear to which said goggle is removably mountable; a magnetic switch mounted to said goggle; a magnet attached to said headgear, and magnetically coupled to said magnetic switch when said goggle is attached to said headgear; a latching relay with contacts, and with a first and second coil responsive to electrical excitation thereof for switching a switch pole to a respective reset contact and a set contact of said latching relay; a first parallel circuit including said first coil in series with a first capacitor and switchable by said magnetic switch to a battery when said goggle is detached from said headgear, and including a resistor switchable by said magnetic switch to said first capacitor and said first coil when said goggle is attached to the headgear; a manually-operated On-Off switch on said goggle, said On-Off switch including an On contact and an Off contact; an image intensifier connectable to said On contact; an second parallel circuit including a second capacitor in series with said second coil and switchable to said battery by the contacts of said latching relay, and including a first means for connecting said On contact to said battery through said latching relay contacts, and means for connecting said second capacitor and said second coil to said battery through said Off contact and through the contacts of said latching relay.
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20. A method of automatically controlling a battery powered image intensifier in a night vision goggle removably attachable to a headgear, and having a manually operated On-Off switch, comprising the steps of:
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automatically disconnecting the battery from the image intensifier when the goggle is removed from said headgear; reattaching the night vision goggle to the headgear; and connecting the battery to the image intensifier by manually cycling the On-Off switch. - View Dependent Claims (21, 22)
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Specification