Patent US4007690A successfully refreshed from Google Patents.
US4007690A
Expired / Lapsed
US
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Practice bomb signal for day or night operation
Assignee: United States Department of the Navy
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Filing: 1975-11-21
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Granted: 1977-02-15
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Expires: 1995-11-21
Abstract
Abstract A signal cartridge for displaying the location of a practice bomb during day or night operation. Upon detonation of the signal cartridge, a power charge expels both a chemical payload and a flashcube from the cartridge case. The flashcube is activated outside the cartridge case. The chemical payload, which is air/water reactive, forms a cloud which is visible during daylight. At night, the light produced by the flashcube is scattered and reflected by particles in the cloud to provide a display.
Inventors
- 👤 John E. Wildridge
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 23:38
CPC Classifications
F; F42; F42B; F42B12/00; F42B12/02; F42B12/36; F42B12/46; F42B12/48
Claims Analysis
Total Claims: 5
Claim 1
Independent Claim
122 words
A signal cartridge for use in a practice bomb for indicating a point of impact comprising, a cartridge case, a primer in said cartridge case arranged to be detonated by a first firing pin, an expelling charge adjacent said primer, a quantity of marking material within said cartridge case for forming a signal cloud upon discharge from said cartridge case by said expelling charge, a percussively-ignitable flashcube within said cartridge case, and means for flashing said flashcube after said flashcube is expelled from said cartridge case, said means including a second firing pin engageable with said flashcube and a bore rider pin for preventing actuation of said second firing pin until said bore rider pin passes the end of said cartridge case.
Claim 2
Dependent Claim
122 words
A signal cartridge for use in a practice bomb for indicating a point of impact comprising, a cartridge case, a primer in said cartridge case arranged to be detonated by a first firing pin, an expelling charge adjacent said primer, a quantity of marking material within said cartridge case for forming a signal cloud upon discharge from said cartridge case by said expelling charge, a percussively-ignitable flashcube within said cartridge case, and means for flashing said flashcube after said flashcube is expelled from said cartridge case, said means including a second firing pin engageable with said flashcube and a bore rider pin for preventing actuation of said second firing pin until said bore rider pin passes the end of said cartridge case.
Claim 3
Dependent Claim
44 words
A signal cartridge for use in a practice bomb for indicating a point of impact as set forth in claim 1 wherein said quantity of marking material is an air/water reactive material and is contained in a sealed frangible container within said cartridge case.
Claim 4
Dependent Claim
29 words
A signal cartridge for use in a practice bomb for indicating a point of impact as set forth in claim 2 wherein said air/water reactive material is titanium tetrachloride.
Claim 5
Dependent Claim
38 words
A signal cartridge for use in a practice bomb for indicating a point of impact as set forth in claim 2 wherein said air/water reactive material is a mixture of equal parts of titanium tetrachloride and vanadium oxytrichloride.
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1980-02-15 | 1980-08-16 | 1981-02-15 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1984-02-15 | 1984-08-16 | 1985-02-15 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1988-02-15 | 1988-08-16 | 1989-02-15 | $7700.00 | Window Closed / Lapsed |