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Title: US5440990: Electronic time fuze
[ Derwent Title ]

Country: US United States of America

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38 pages

Inventor: Wiedefeld, William G.; Clermont, FL
Peterson, Michael H.; Glendale, CA
Cote, William F.; Windermere, FL

Assignee: The Walt Disney Company, Burbank, CA
other patents from WALT DISNEY COMPANY (617665) (approx. 101)
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Published / Filed: 1995-08-15 / 1993-09-16

Application Number: US1993000122637

IPC Code: Advanced: F41A 19/58; F42C 11/06;
Core: F41A 19/00; F42C 11/00;
IPC-7: F23Q 7/02;

ECLA Code: F41A19/58; F42C11/06B;

U.S. Class: Current: 102/215;
Original: 102/215;

Field of Search: 102/206,215,218,202.3,200 089/006,6.5 361/248,249

Priority Number:
1993-09-16  US1993000122637

Abstract: An electronic time fuse for controlling and initiating the explosion of an explosive is provided. The fuse comprises a timing circuit, an energy storage means, and a explosion initiation means. The fuse is initially connected through a two-wire interface to a local control unit (LCU). The LCU tests the integrity of the fuse, charges the energy storage means, measures the clock accuracy of the fuse, compensates for any inaccuracy of the fuse clock, loads timing information into the fuse, and commands the fuse to begin a timing sequence toward explosion. The fuse responds to LCU commands. The fuse ignores signals present on the two-wire interface for a period of time after the command to begin the timing sequence toward explosion is given. The fuse also monitors the status of the two-wire interface and the signals present on it and resets the fuse to an inert state if any irregularities are detected.

Attorney, Agent or Firm: Hecker & Harriman ;

Primary / Asst. Examiners: Pihulic, Daniel T.;

Maintenance Status: R2 Reinstated

INPADOC Legal Status: Show legal status actions

Family: None

First Claim:
Show all 16 claims
We claim:     1. A method of initiating an explosion comprising the steps of:
  • providing a charging current from a control means to a detonating means having a capacitor, said charging current to charge said capacitor;
  • providing a start command from said control means to said detonating means;
  • providing a first clock signal at a first frequency from said detonating means to said control means;
  • determining said first frequency at said control means and providing a time delay signal to said detonating means based on said first frequency, said time delay signal controlling a time delay between a launch command and a detonate command;
  • providing said launch command from said control means to said detonating means; providing said detonation command at said detonating means when said time delay has occurred and said detonating means is not connected to said control means; resetting said detonating means when said detonating means is connected to said control means after a portion of said time delay has expired.

Background / Summary: Show background / summary

Drawing Descriptions: Show drawing descriptions

Description: Show description

Forward References: Show 13 U.S. patent(s) that reference this one

U.S. References: Go to Result Set: All U.S. references   |  Forward references (13)   |   Backward references (6)   |   Citation Link

Patent  Pub.Date  Inventor Assignee   Title
Get PDF - 5pp US3500746  1970-03 Ambrosini   WEAPON SYSTEM WITH AN ELECTRONIC TIME FUZE
Get PDF - 12pp US3934514  1976-01 Dawkins  ICI Australia Limited Firing devices and processes
Get PDF - 23pp US4409897  1983-10 Kirby et al.  Imperial Chemical Industries, Ltd. Apparatus & method for selectively activating plural electrical loads at predetermined relative times
Get PDF - 27pp US4986183  1991-01 Jacob et al.  Atlas Powder Company Method and apparatus for calibration of electronic delay detonation circuits
Get PDF - 5pp US5097765  1992-03 Ziemba  The United States of America as represented by the Secretary of the Army Electric fuze with selectable modes
Get PDF - 10pp US5173569  1992-12 Pallanck et al.  The Ensign-Bickford Company Digital delay detonator
Foreign References: None

Other Abstract Info: DERABS G1995-292079 DERABS G1995-292079

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