US2748369A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Transducer
Assignee: Birmingham Small Arms Co Ltd
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Filing: 1951-12-07
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Granted: 1956-05-29
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Expires: 1971-12-07
Abstract
No abstract record available.
Inventors
- 👤 Smyth Charles Norman
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 15:55
CPC Classifications
B; B06; B06B; B06B1/00; B06B1/02; B06B1/06; B06B1/0607; B06B1/0622
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
96 words
AN ELECTROMECHANICAL DEVICE SUITABLE FOR USE IN SOUND-WAVE-RANGING APPARATUS CONSISTING OF TWO JUXTAPOSED SECTIONS OF A PIEZO-ELECTRIC CRYSTAL SLAB WHICH IS CUT INTO TWO SECTIONS AND MOUNTED SIDE BY SIDE IN A COMMON HOUSING, ONE OF SAID CRYSTAL SECTIONS HAVING UPON ONE OF ITS FACES AT LEAST ONE ELECTRODE CONNECTED TO A PULSE GENERATOR AND THE OTHER CRYSTAL SECTION HAVING AT LEAST ONE ELECTRODE CONNECTED TO THE RECEIVER AMPLIFIER, THE OTHER FACE OF THE CRYSTAL SECTION CONNECTED TO THE SAID PULSE GENERATOR BEING OPERATIVE TO TRANSMIT AN INTERROGATING PULSE THROUGH A MEDIUM WHICH IS UNDER INVESTIGATION.
Claim 2
Dependent Claim
96 words
AN ELECTROMECHANICAL DEVICE SUITABLE FOR USE IN SOUND-WAVE-RANGING APPARATUS CONSISTING OF TWO JUXTAPOSED SECTIONS OF A PIEZO-ELECTRIC CRYSTAL SLAB WHICH IS CUT INTO TWO SECTIONS AND MOUNTED SIDE BY SIDE IN A COMMON HOUSING, ONE OF SAID CRYSTAL SECTIONS HAVING UPON ONE OF ITS FACES AT LEAST ONE ELECTRODE CONNECTED TO A PULSE GENERATOR AND THE OTHER CRYSTAL SECTION HAVING AT LEAST ONE ELECTRODE CONNECTED TO THE RECEIVER AMPLIFIER, THE OTHER FACE OF THE CRYSTAL SECTION CONNECTED TO THE SAID PULSE GENERATOR BEING OPERATIVE TO TRANSMIT AN INTERROGATING PULSE THROUGH A MEDIUM WHICH IS UNDER INVESTIGATION.
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) | 1959-05-29 | 1959-11-28 | 1960-05-29 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1963-05-29 | 1963-11-28 | 1964-05-29 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1967-05-29 | 1967-11-28 | 1968-05-29 | $7700.00 | Window Closed / Lapsed |