US3819962A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Ballistic impact detector
Assignee: United States Department of the Navy
•
Filing: 1973-05-04
•
Granted: 1974-06-25
•
Expires: 1993-05-04
Abstract
Abstract A ferroelectric ceramic ring transducer assembly for reliably sensing projectile impacts upon a target surface. The transducer is mounted by a single hole in the target to allow unimpeded vibration at the resonance frequency. In addition, the ring is designed to have a resonance frequency which matches the compressional impact shockwave to guard against false readings.
Inventors
- 👤 L Ivey
- 👤 T Henriquez
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 18:53
CPC Classifications
G; G01; G01L; G01L5/00; G01L5/14; G01H; G01H1/00; G01H1/04; G01H1/08
Claims Analysis
Total Claims: 4
Claim 1
Independent Claim
122 words
A ballistic impact detector for sensing compressional waves produced in a target comprising: a ferroelectric ceramic ring having inside and outside faces and a resonant frequency substantially equal to said compressional waves; corprene rings attached to said inside and outside faces to facilitate vibration of said ferroelectric ceramic ring along its radius; means for directly attaching said ferroelectric ceramic ring and said corprene rings to said target surface so that said ferroelectric ceramic ring is caused to vibrate only when a compressional wave is produced in said target; means for bonding said ferroelectric ceramic ring and said corprene rings to said attaching means; and, output means attached to said ferroelectric ring for sensing electrical signals produced by said ferroelectric ring upon vibration.
Claim 2
Dependent Claim
122 words
A ballistic impact detector for sensing compressional waves produced in a target comprising: a ferroelectric ceramic ring having inside and outside faces and a resonant frequency substantially equal to said compressional waves; corprene rings attached to said inside and outside faces to facilitate vibration of said ferroelectric ceramic ring along its radius; means for directly attaching said ferroelectric ceramic ring and said corprene rings to said target surface so that said ferroelectric ceramic ring is caused to vibrate only when a compressional wave is produced in said target; means for bonding said ferroelectric ceramic ring and said corprene rings to said attaching means; and, output means attached to said ferroelectric ring for sensing electrical signals produced by said ferroelectric ring upon vibration.
Claim 3
Dependent Claim
28 words
The detector of claim 1 wherein said attaching means comprises a single bolt adapted to fit through a single hole in said target for attachment with a wingnut.
Claim 4
Dependent Claim
23 words
The device of claim 2 wherein said means for bonding comprises a material of a similar nature to the material of said target.
References Cited (Backward Citations)
No citation records indexed.
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1977-06-24 | 1977-12-24 | 1978-06-25 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1981-06-24 | 1981-12-24 | 1982-06-25 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1985-06-24 | 1985-12-24 | 1986-06-25 | $7700.00 | Window Closed / Lapsed |