US3078801A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Demolition timing device
Assignee: Individual
•
Filing: 1960-03-21
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Granted: 1963-02-26
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Expires: 1980-03-21
Abstract
No abstract record available.
Inventors
- 👤 Rzewinski Leonard
- 👤 William G Meschino
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 03:25
CPC Classifications
F; F42; F42D; F42D1/00; F42D1/04; F42D1/045; F42D1/05
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
164 words
A DEMOLITION TIMER COMPRISING A CYLINDRICAL CASING, A CORE OF INSULATING MATERIAL WITHIN SAID CASING, AN ELECTRICALLY ENERGIZED TIMING DELAY CIRCUIT INCLUDING A PLURALITY OF RESISTANCES AND A PRIMER WITHIN SAID CASING, SAID CORE BEING FORMED WITH A LONGITUDINAL BORE, A SHAFT MOUNTED FOR LONGITUDINAL AND ROTATIVE MOVEMENT IN SAID BORE, A PAIR OF SPACED METALLIC BANDS ON SAID SHAFT, ONE OF SAID BANDS NORMALLY SHORTING THE PRIMER PORTION OF SAID CIRCUIT, MEANS CONNECTED TO SAID SHAFT TO ROTATE THE SHAFT, MEANS CARRIED BY THE SHAFT CONTACTING SAID RESISTANCE ELEMENTS WHEREBY THE DEGREE OF ROTATION OF SAID SHAFT WILL SELECT ANY NUMBER OF RESISTANCE ELEMENTS FOR THE TIMING CIRCUIT, THE OTHER OF SAID SHAFT CARRIED BANDS UPON LONGITUDINAL MOVEMENT OF SAID SHAFT CONNECTING SAID RESISTANCE ELEMENTS INTO SAID CIRCUIT AND SIMULTANEOUSLY UNSHORTING THE PRIMER PORTION OF THE CIRCUIT TO CAUSE SAID CIRCUIT TO FIRE SAID PRIMER AT THE END OF A DELAY PERIOD DEPENDENT UPON THE NUMBER OF RESISTANCE ELEMENTS INCLUDED IN SAID CIRCUIT.
Claim 2
Dependent Claim
164 words
A DEMOLITION TIMER COMPRISING A CYLINDRICAL CASING, A CORE OF INSULATING MATERIAL WITHIN SAID CASING, AN ELECTRICALLY ENERGIZED TIMING DELAY CIRCUIT INCLUDING A PLURALITY OF RESISTANCES AND A PRIMER WITHIN SAID CASING, SAID CORE BEING FORMED WITH A LONGITUDINAL BORE, A SHAFT MOUNTED FOR LONGITUDINAL AND ROTATIVE MOVEMENT IN SAID BORE, A PAIR OF SPACED METALLIC BANDS ON SAID SHAFT, ONE OF SAID BANDS NORMALLY SHORTING THE PRIMER PORTION OF SAID CIRCUIT, MEANS CONNECTED TO SAID SHAFT TO ROTATE THE SHAFT, MEANS CARRIED BY THE SHAFT CONTACTING SAID RESISTANCE ELEMENTS WHEREBY THE DEGREE OF ROTATION OF SAID SHAFT WILL SELECT ANY NUMBER OF RESISTANCE ELEMENTS FOR THE TIMING CIRCUIT, THE OTHER OF SAID SHAFT CARRIED BANDS UPON LONGITUDINAL MOVEMENT OF SAID SHAFT CONNECTING SAID RESISTANCE ELEMENTS INTO SAID CIRCUIT AND SIMULTANEOUSLY UNSHORTING THE PRIMER PORTION OF THE CIRCUIT TO CAUSE SAID CIRCUIT TO FIRE SAID PRIMER AT THE END OF A DELAY PERIOD DEPENDENT UPON THE NUMBER OF RESISTANCE ELEMENTS INCLUDED IN SAID CIRCUIT.
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1966-02-25 | 1966-08-27 | 1967-02-26 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1970-02-25 | 1970-08-27 | 1971-02-26 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1974-02-25 | 1974-08-27 | 1975-02-26 | $7700.00 | Window Closed / Lapsed |