Attachment device |
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| 申请号 | US74297568 | 申请日 | 1968-07-02 | 公开(公告)号 | US3891466A | 公开(公告)日 | 1975-06-24 |
| 申请人 | US NAVY; | 发明人 | ERICKSON PORTER W; HELLFRITZSCH ALVIN G; | ||||
| 摘要 | A thermoelectric magnet for interconnecting metallic elements utilizing a thermocouple having an insulated heat-producing chemical charge at the ''''hot'''' junction thereof which is activated on command and permanently magnetizes the core material. | ||||||
| 权利要求 | 1. A magnetic device attachable to a ferromagnetic surface comprising: a core; coil means for said core; thermocouple means energizing said core said thermocouple means having a ''''hot'''' junction and a ''''cold'''' junction; chemical charge means for producing heat energy and coupled to said ''''hot'''' junction; said chemical charge means being selectively activated to produce sufficient heat at said ''''hot'''' junction to cause current to flow through said coil means and magnetize said core. 2. The device as defined in claim 1 wherein said core is constructed of material capable of being permanently magnetized and said charge means is capable of providing sufficient heat to permanently magnetize said core. 3. The device as defined in claim 2 wherein said thermocouple means includes: a pair of arms extending from said coil means, said arms being constructed of similar conductive material; a bar member formed of a material dissimilar to said arms and connected to one of said arms to form said ''''hot'''' junction and to the other of said arms to form said ''''cold'''' junction. 4. The device as defined in claim 3 wherein said chemical charge means includes: a cartridge; said cartridge containing a high caloric, thermite-type mixture for producing sufficient heat energy to magnetize said core; primer charge means adjacent said mixture for igniting said mixture upon receipt of an impacting force. 5. The device as defined in claim 4 further including: a barrel member for receiving at least one of said cartridges; said barrel member being in thermal communication with said ''''hot'''' junction; firing means associated with said barrel member for selective impacting engagement with said primer charge means. 6. The device as defined in claim 5 wherein said firing means includes: firing pin means for engaging said primer charge means and movable between an impacting position and a withdrawn position; spring means urging said pin means to said impacting position; trigger means releasably retaining said pin means in said withdrawn position against the urging of said spring means. 7. The device as defined in claim 6 wherein said coil means and said depending arms are constructed of copper and said bar member is formed of constantan. 8. The device as defined in claim 1 wherein said chemical charge means includes: a cartridge; said cartridge containing a high caloric, thermite-type mixture for producing sufficient heat energy to magnetize said core; primer charge means adjacent said mixture for igniting said mixture upon receipt of an impacting force. 9. The device as defined in claim 8 further including: a barrel member for receiving at least one of said cartridges; said barrel member being in thermal communication with said ''''hot'''' junction; firing means associated with said barrel member for selective impacting engagement with said primer charge means. 10. The device as defined in claim 1 wHerein a pair of coils surround said core and thermocouple means is connected to each of said coils. |
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