Electronic device

Details Electronic device Electronic device

1991-06-24

1992-10-27

Johnson, Stephen M.

Ammunition and explosives

Igniting devices and systems

Ignition or detonation circuit

102311, 102207, F42D 1055

Patent

active

051591499

ABSTRACT:
An electronic detonator system 10 comprises a remote RF transmitter 11 and a transportable housing 12 comprising means 13 for charging energy storage means in the detonator 15 and means 14 for programming delay time means in the detonator. The programming means 14 and charging means 13 are connected to a connector 26. Detonator 15 comprises an antenna 29, a RF receiver 30, programmable delay time means 32, a switch 33, a fuse 34 and energy storage means 35. The delay time means 32 and energy storage means 35 are connected to a connector 28. In use, connector 26 is connected to connector 28 at the blast site and storage device 35 is charged and delay time means 32 is programmed. A fire command signal is then transmitted by transmitter 11 and after the delay time, switch 33 connects storage means 35 to fuse 34 thereby to energize the fuse.

REFERENCES:
patent: 3170399 (1965-02-01), Hinman, Jr.
patent: 3675578 (1972-07-01), Douglas et al.
patent: 3750586 (1973-08-01), Swallow et al.
patent: 3834310 (1974-09-01), Ueda et al.
patent: 4615268 (1986-10-01), Nakano et al.
patent: 4685396 (1987-08-01), Birse et al.
patent: 4777880 (1988-10-01), Beattie et al.
patent: 4802414 (1989-02-01), Fiedler et al.

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