US4633779A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Timing apparatus for a fuse
Assignee: Motorola Solutions Inc
•
Filing: 1984-06-29
•
Granted: 1987-01-06
•
Expires: 2004-06-29
Abstract
Abstract An oscillator supplies clock pulses to a counter which also has a preselected time applied thereto and arming means are initiated when the count reaches the preselected time. Checking means are utilized throughout the circuitry to provide failsafe checking of each critical circuit with the arming circuit being deactivated if an error is detected. The entire circuit is incorporated in a single IC for energy and space conservation.
Inventors
- 👤 Bradley M. Biggs
- 👤 Jimmy L. Brown
- 👤 Thomas M. Kerns
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-02 04:55
CPC Classifications
F; F42; F42C; F42C11/00; F42C11/06; F42C11/065
Claims Analysis
Total Claims: 9
Claim 1
Independent Claim
119 words
Timing apparatus incorporated in a fuze comprising: oscillator means for providing clock pulses including a multivibrator having an upper limit frequency of operation beyond which said multivibrator does not provide an output; data selecting means for providing an output indicative of a preselected time; a counter coupled to receive the clock pulses from said oscillator means and further coupled to said data selecting means for counting clock pulses until the preselected time is achieved; firing means coupled to said counter for detonating the fuze after the preselected time is achieved; and checking means coupled to said counter and said firing means for performing safety checks on said counter and deactivating said firing means in the event of a failure.
Claim 2
Dependent Claim
119 words
Timing apparatus incorporated in a fuze comprising: oscillator means for providing clock pulses including a multivibrator having an upper limit frequency of operation beyond which said multivibrator does not provide an output; data selecting means for providing an output indicative of a preselected time; a counter coupled to receive the clock pulses from said oscillator means and further coupled to said data selecting means for counting clock pulses until the preselected time is achieved; firing means coupled to said counter for detonating the fuze after the preselected time is achieved; and checking means coupled to said counter and said firing means for performing safety checks on said counter and deactivating said firing means in the event of a failure.
Claim 3
Dependent Claim
170 words
Timing apparatus for a fuze comprising: oscillator means for providing clock pulses; data selecting means for providing an output indicative of a preselected time, said data selecting means including setting means for setting the preselected time one of manually at the fuze and automatically remote from the fuze; a counter coupled to receive the clock pulses from said oscillator means and further coupled to said data selecting means for counting clock pulses until the preselected time is achieved; firing means coupled to said counter for detonating the fuze after the preselected time is achieved, said firing means including logic circuitry connected to receive any one of an impact signal and a preselected time signal; and checking means coupled to said counter and said firing means for performing safety checks on said counter and deactivating said firing means in the event of a failure, said checking means including circuitry for receiving remote setting signals and verifying means coupled to said receiving circuitry for verifying the validity of received remote setting signals.
Claim 4
Dependent Claim
170 words
Timing apparatus for a fuze comprising: oscillator means for providing clock pulses; data selecting means for providing an output indicative of a preselected time, said data selecting means including setting means for setting the preselected time one of manually at the fuze and automatically remote from the fuze; a counter coupled to receive the clock pulses from said oscillator means and further coupled to said data selecting means for counting clock pulses until the preselected time is achieved; firing means coupled to said counter for detonating the fuze after the preselected time is achieved, said firing means including logic circuitry connected to receive any one of an impact signal and a preselected time signal; and checking means coupled to said counter and said firing means for performing safety checks on said counter and deactivating said firing means in the event of a failure, said checking means including circuitry for receiving remote setting signals and verifying means coupled to said receiving circuitry for verifying the validity of received remote setting signals.
Claim 5
Dependent Claim
16 words
Timing apparatus as claimed in claim 2 wherein the verifying means includes a pulse width discriminator.
Claim 6
Dependent Claim
30 words
Timing apparatus as claimed in claim 3 herein the verifying means further includes a shift register and logic for identifying the presence of two identically sequential words of remote data.
Claim 7
Dependent Claim
19 words
Timing apparatus as claimed in claim 4 where the apparatus is included in a single large scale integrated circuit.
Claim 8
Dependent Claim
144 words
Timing apparatus incorporated in a fuze comprising: oscillator means for providing clock pulses; data selecting means for providing an output indicative of a preselected time; a counter having a plurality of stages ranging from most to least significant, said counter being coupled to receive the clock pulses from said oscillator means and further coupled to said data selecting means for counting clock pulses until the preselected time is achieved; firing means coupled to said counter for detonating the fuze after the preselected time is achieved; checking means coupled to said counter, said data selecting means and said firing means for checking the operation of at least the most significant stages of said counter, for checking the operation of said data selecting means and for deactivating said firing means in the event of a failure in one of said counter and said data selecting means.
Claim 9
Dependent Claim
144 words
Timing apparatus incorporated in a fuze comprising: oscillator means for providing clock pulses; data selecting means for providing an output indicative of a preselected time; a counter having a plurality of stages ranging from most to least significant, said counter being coupled to receive the clock pulses from said oscillator means and further coupled to said data selecting means for counting clock pulses until the preselected time is achieved; firing means coupled to said counter for detonating the fuze after the preselected time is achieved; checking means coupled to said counter, said data selecting means and said firing means for checking the operation of at least the most significant stages of said counter, for checking the operation of said data selecting means and for deactivating said firing means in the event of a failure in one of said counter and said data selecting means.
References Cited (Backward Citations)
US3500746A
Cited
US3622987A
Cited
US3646371A
Cited
US3676801A
Cited
US3760732A
Cited
US3745760A
Cited
US4044680A
Cited
US4240350A
Cited
US4217826A
Cited
US4321562A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1990-01-05 | 1990-07-07 | 1991-01-06 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1994-01-05 | 1994-07-07 | 1995-01-06 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1998-01-05 | 1998-07-07 | 1999-01-06 | $7700.00 | Window Closed / Lapsed |