US3786285A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Moment actuated transducer
Assignee: Individual
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Filing: 1972-12-08
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Granted: 1974-01-15
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Expires: 1992-12-08
Abstract
Abstract A moment-actuated transducer unit mounted to an elastic belt having Velcro-type fastener means for attaching the belt and transducer unit snugly around the chest or abdomen region of a subject''s body provides a highly sensitive and easily installed respiration transducer assembly. The output of the transducer unit can be connected directly to a high input impedance recorder or to a signal conditioning circuit which includes an unfiltered output and a high frequency filtered output wherein a regular high input impedance recorder can be selectively connected to either of such outputs.
Inventors
- 👤 R Reibold
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 17:08
CPC Classifications
A; A61; A61B; A61B5/00; A61B5/68; A61B5/6801; A61B5/683; A61B5/6831; A61B5/08; A61B5/103; A61B5/11; A61B5/113; A61B5/1135; A61B5/22; A61B5/221; A61B5/222; H; H04; H04R; H04R1/00; H04R1/46
Claims Analysis
Total Claims: 4
Claim 1
Independent Claim
160 words
In a transducer system of the class described, a transducer unit comprising: a disc-like piezoelectric element including a deflectable planar beam, and a piezoelectric crystal bonded to a plane surface of said beam; a pair of moment arms each including a normally lower and a normally upper end, said lower ends being affixed in a spaced relationship therebetween to said beam with said arms extending angularly a predetermined distance from said surface and intersecting at a substantial angle of at least about 45 degrees with respect thereto; and means fastenable to force-generating support means and connecting with said arms at least near said upper ends thereof for supporting said element and providing a moment on said arms, said connecting means normally applying a force from said support means to said arms at least near said upper ends thereof in a direction generally parallel to said surface to provide said moment which bends said element and produces an output signal therefrom.
Claim 2
Dependent Claim
160 words
In a transducer system of the class described, a transducer unit comprising: a disc-like piezoelectric element including a deflectable planar beam, and a piezoelectric crystal bonded to a plane surface of said beam; a pair of moment arms each including a normally lower and a normally upper end, said lower ends being affixed in a spaced relationship therebetween to said beam with said arms extending angularly a predetermined distance from said surface and intersecting at a substantial angle of at least about 45 degrees with respect thereto; and means fastenable to force-generating support means and connecting with said arms at least near said upper ends thereof for supporting said element and providing a moment on said arms, said connecting means normally applying a force from said support means to said arms at least near said upper ends thereof in a direction generally parallel to said surface to provide said moment which bends said element and produces an output signal therefrom.
Claim 3
Dependent Claim
172 words
The invention as defined in claim 1 wherein said arms include a pair of loop-like arms each having a normally lower and a normally upper end portion and side portions joining said lower and upper end portions together in a closed loop, said lower end portions being affixed in a spaced parallel relationship with respect to each other to said beam and said side portions extending angularly a predetermined distance from said surface and intersecting at a substantial angle of at least about 60* with respect thereto, said connecting means includes an elastic belt attached at its ends to said upper end portions of said loops, and said support means includes a selected portion of a subject''s body, said belt being fastened thereabout at a predetermined tension and applying a moment to said arms according to its instantaneous tension whereby said element is actuated with expansion and contrAction of said belt by said body portion to produce a variable output signal from said element representative of the motions of said body portion.
Claim 4
Dependent Claim
43 words
The invention as defined in claim 2 wherein said side portions of said loops extend perpendicularly a predetermined distance from said surface, and said belt includes fastener means adjustable to secure said belt at a tactually established predetermined tension about said body portion.
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) | 1977-01-14 | 1977-07-16 | 1978-01-15 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1981-01-14 | 1981-07-16 | 1982-01-15 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1985-01-14 | 1985-07-16 | 1986-01-15 | $7700.00 | Window Closed / Lapsed |