US3553501A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Ultrasonic piezoelectric transducer cartridge
Assignee: United States Department of the Interior
•
Filing: 1968-02-16
•
Granted: 1971-01-05
•
Expires: 1988-02-16
Abstract
Abstract A transducer cartridge assembly providing means to readily interchange transducer crystals and to match crystal impedance with that of the backing member.
Inventors
- 👤 Richard E Thill
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 16:44
CPC Classifications
G; G01; G01N; G01N29/00; G01N29/22; G01N29/28; B; B06; B06B; B06B1/00; B06B1/02; B06B1/06; B06B1/0644; B06B1/0662; B06B1/0681
Claims Analysis
Total Claims: 5
Claim 1
Independent Claim
29 words
The device of claim 1 including an outer metallic housing member surrounding said piezoelectric crystal and said second conducting means and being detachably connected to said first conducting means.
Claim 2
Dependent Claim
34 words
The device of claim 2 including an electrically insulating and energy attenuating member disposed around and in contact with said conically tapered second conducting means and separating said means from said outer housing member.
Claim 3
Dependent Claim
13 words
The device of claim 3, wherein said apex angle is less than 30*.
Claim 4
Dependent Claim
26 words
The device of claim 4 wherein the acoustical impedance of said first conducting means is intermediate to that of said piezoelectric crystal and said test specimen.
Claim 5
Dependent Claim
21 words
The device of claim 5 wherein a portion of said outer metallic housing member is provided with a regular lathe taper.
References Cited (Backward Citations)
US2972068A
Cited
US3079584A
Cited
US3302044A
Cited
US3427481A
Cited
US3376438A
Cited
US3378705A
Cited
US3403271A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1974-01-04 | 1974-07-06 | 1975-01-05 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1978-01-04 | 1978-07-06 | 1979-01-05 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1982-01-04 | 1982-07-06 | 1983-01-05 | $7700.00 | Window Closed / Lapsed |