[특허]Portable light beacon

IPC분류정보
국가/구분	United States(US) Patent 등록
국제특허분류(IPC7판)	F21L-007/00
출원번호	US-0263075 (1988-10-27)
발명자 / 주소	Brain, John E.
대리인 / 주소	Shlesinger, Arkwright & Garvey
인용정보	피인용 횟수 : 35 인용 특허 : 9

초록 ▼

A portable light beacon for use on life rafts and the like that has a long life due to a flashing light allowing the battery to recharge and a water sensing switch that once wet remains on. The light beacon comprises a portable battery power source in a water proof container, a flashing light with w

A portable light beacon for use on life rafts and the like that has a long life due to a flashing light allowing the battery to recharge and a water sensing switch that once wet remains on. The light beacon comprises a portable battery power source in a water proof container, a flashing light with watertight electrical connections between the flashing light and the power source, and a fluid sensing switch comprising a fluid absorbent composition positioned between two terminals with circuitry to activate the flashing light when an electrical conductive fluid has been absorbed by the fluid absorbent composition to provide an electrical path between the two terminals.

대표청구항 ▼

1. A portable light beacon comprising: a portable battery power source in a water proof container; light means connected by an electrical path to said battery power source, a fluid sensing switch located in said electrical path between the light means and the power source said fluid sensing swi

1. A portable light beacon comprising: a portable battery power source in a water proof container; light means connected by an electrical path to said battery power source, a fluid sensing switch located in said electrical path between the light means and the power source said fluid sensing switch including a fluid absorbent medium positioned between a pair of terminals which are in said electrical path; and an electronic circuitry in said electrical path, constituting means for sensing a relatively weak electrical current between said terminals occurring when electro-conductive fluid has been absorbed by said medium, and for activating said light means in response to said current. 2. A portable light beacon, as defined in claim 1, wherein said light means is a flashing light means. 3. The portable light beacon according to claim 2 wherein the circuitry for the fluid sensing switch comprises a transistor and resistance. 4. The portable light beacon according to claim 2 wherein the fluid sensing switch is contained in a container housing the portable battery source and has at least one port for admitting fluid. 5. The portable light beacon according to claim 2 including a light sensing switch means to prevent activation of the flashing light means when ambient light is above a preset level. 6. The portable light beacon according to claim 2 wherein the fluid absorbing medium in the sensing switch is material selected from the group consisting of cotton batt, wool batt, and non-woven synthetic fibre batt. 7. The portable light beacon according to claim 2 including a testing system comprising a reed switch activated by a separate magnet, the reed switch activating the flashing light means. 8. The portable light beacon according to claim 2 including a radio beacon incorporated therein activated by the fluid sensing switch when the flashing light means is activated. 9. The portable light beacon according to claim 2 wherein the flashing light means is a strobe light. 10. The portable light beacon according to claim 2 wherein the flashing light means is an incandescent light. 11. The portable light beacon according to claim 2 wherein the flashing light means is an LED. 12. The portable light beacon according to claim 11 wherein the LED emits energy in the infrared range. 13. The portable light beacon according to claim 2 wherein the power source and flashing light means are incorporated within one container, and the fluid sensing switch is a separate unit with a flexible connector therebetween. 14. The portable light beacon according to claim 13 including a ring switch about the periphery of the container, the ring switch being rotatable in either direction for 360° and having a plurality of positive switch positions. 15. The portable light beacon according to claim 2 wherein the portable battery power source is a lithium cell battery. 16. The portable light beacon according to claim 15 wherein the lithium cell battery is a lithium thionyl chloride battery. 17. The portable light beacon according to claim 2 wherein the power source and fluid sensing switch are incorporated in one unit and the flashing light means is incorporated in another unit with a flexible connector therebetween. 18. The portable light beacon according to claim 17 wherein a waterproof quick connect coupling means is provided to join the flexible connector to the unit containing the power source and fluid sensing switch. 19. The portable light beacon according to claim 17 wherein the units are formed of fluoropolymer materials. 20. The portable light beacon according to claim 17 wherein the units are formed of polysulphone materials. 21. The portable light beacon according to claim 17 wherein the flashing light means comprises a plurality of electroluminescent light strips. 22. The portable light beacon according to claim 21 wherein the electroluminescent light strips are arranged around a canopy doorway of a life raft. 23. The portable light beacon according to claim 21 wherein the electroluminescent light strips have at least one conducting surface forming an electrode made of material selected from the group consisting of electrically conductive silicone, fluorosilicone, and fluorocarbon elastomeric compounds. 24. The portable light beacon according to claim 21 wherein the electroluminescent light strips are flexible. 25. The portable light beacon according to claim 21 wherein the electroluminescent light strips are contained within a translucent protective covering. 26. The portable light beacon according to claim 25 wherein the translucent protective covering is made of material selected from the group consisting of silicone, fluorosilicone and fluorocarbon elastomeric compounds. 27. The portable light beacon according to claim 17 wherein the unit containing the power source and fluid sensing switch is cylindrical and has a rotatable ring switch thereon rotatable in either direction through 360°, the switch having positions for (1) automatic operation when the fluid sensing switch activates the flashing light means (2), test position for operating flashing light means (3), inspection position for continuous light, and (4) off position. 28. The portable light beacon according to claim 27 wherein the rotatable ring switch includes a rotatable ring with a permanent magnet therein to activate at least one reed switch at a switch position. 29. The portable light beacon according to claim 27 including a ball and spring in a cylindrical cavity, the ball engaging in a detent at each switch position. 30. The portable light beacon according to claim 27 including a luminous strip on the rotatable ring switch to indicate the switch position. 31. The portable light beacon according to claim 27 including a locking means to lock the rotatable ring switch in at least one switch position. 32. A portable light beacon, comprising: a battery in a water proof container; light means; electrical connection means between said light means and said battery, said electrical connection means, battery and light means forming an electrical circuit; a fluid sensing switch in said electrical circuit, said fluid sensing switch including: a) a pair of terminals coupled to said electrical connection means; and b) a fluid retaining medium between said terminals, said fluid sensing switch constituting means for: i) establishing an electrical path between said terminals when said fluid sensing switch is immersed in an electro-conductive fluid, thereby allowing a relatively weak electrical current to flow between the terminals; ii) maintaining the flow of electrical current between said terminals when said fluid sensing switch is removed from the electro-conductive fluid, by retaining between said terminals a quantity of electro-conductive fluid to maintain said electrical path; and an electronic circuit means in said electrical circuit, for activating said light means in response to said electrical current.

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