US2851884A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Means for determining crystal orientation and purity
Assignee: Individual
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Filing: 1951-09-13
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Granted: 1958-09-16
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Expires: 1971-09-13
Abstract
No abstract record available.
Inventors
- 👤 David L Arenberg
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 20:59
CPC Classifications
B; B06; B06B; B06B1/00; B06B1/02; B06B1/0207; B06B1/06; B06B1/0644; G; G01; G01N; G01N29/00; G01N29/04; B06B2201/00; B06B2201/40; G01N2291/00; G01N2291/04; G01N2291/042; G01N2291/0428; G01N2291/044; G01N2291/26; G01N2291/269; G01N2291/2698
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
122 words
IN A PIEZOELETRIC CRYSTAL ORIENTATION TESTER, A FUSED QUARTZ SOUND WAVE TRANSMITTING ELEMENT INCLUDING A WEDGE PORTION HAVING A WEDGE ANGLE OF 27* 45'' AND A BLOCK PORTION HAVING PARALLEL OPPOSITE RECTANGULAR FACES AND AN END FACE NORMAL TO SAID PARALLEL FACES WHEREBY A PEIZOELECTRIC CRYSTAL MOUNTED ON A WEDGE FACE OF SAID ELEMENT AND CUT TO GENERATE AN SH TYPE OF SHEAR WAVE WILL, THEN EXCITED BY AN ELECTRICAL PULSE, RADIATE A SOUND WAVE ONLY THE SH COMPONENT OF WHICH WILL BE INTERNALLY REFLECTED MULTIPLY FROM SAID PARALLEL FACES, STRIKE SAID END FACE AND THEN BE INTERNALLY REFLECTED BACK TO SAID CRYSTAL VIA A PATH WHICH IS PARALLEL TO THAT PREVIOUSLY TAKEN BY THE SOUND WAVE BEFORE IT REACHED SAID FACE.
Claim 2
Dependent Claim
122 words
IN A PIEZOELETRIC CRYSTAL ORIENTATION TESTER, A FUSED QUARTZ SOUND WAVE TRANSMITTING ELEMENT INCLUDING A WEDGE PORTION HAVING A WEDGE ANGLE OF 27* 45'' AND A BLOCK PORTION HAVING PARALLEL OPPOSITE RECTANGULAR FACES AND AN END FACE NORMAL TO SAID PARALLEL FACES WHEREBY A PEIZOELECTRIC CRYSTAL MOUNTED ON A WEDGE FACE OF SAID ELEMENT AND CUT TO GENERATE AN SH TYPE OF SHEAR WAVE WILL, THEN EXCITED BY AN ELECTRICAL PULSE, RADIATE A SOUND WAVE ONLY THE SH COMPONENT OF WHICH WILL BE INTERNALLY REFLECTED MULTIPLY FROM SAID PARALLEL FACES, STRIKE SAID END FACE AND THEN BE INTERNALLY REFLECTED BACK TO SAID CRYSTAL VIA A PATH WHICH IS PARALLEL TO THAT PREVIOUSLY TAKEN BY THE SOUND WAVE BEFORE IT REACHED SAID FACE.
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) | 1961-09-15 | 1962-03-17 | 1962-09-16 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1965-09-15 | 1966-03-17 | 1966-09-16 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1969-09-15 | 1970-03-17 | 1970-09-16 | $7700.00 | Window Closed / Lapsed |