US3602806A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Selective activity meter for laboratory animals
Assignee: Individual
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Filing: 1969-02-12
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Granted: 1971-08-31
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Expires: 1989-02-12
Abstract
Abstract A system for obtaining information concerning the activity of animate specimens and a quantitative measurement of many varieties of motions. Specifically, the invention comprises a plurality of inductive coils in a resonant circuit configuration utilizing variations in the ''''Q'''' of the circuit to provide an output.
Inventors
- 👤 Jan A Czekajewski
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 00:23
CPC Classifications
A; A61; A61B; A61B5/00; A61B5/103; A61B5/11; A61B5/1102; A01; A01K; A01K1/00; A01K1/02; A01K1/03; A01K1/031; A01K1/0317; A61B2503/00; A61B2503/04; A61B2503/045; A61B2503/40; A61B2503/42; A61B2562/00; A61B2562/02; A61B2562/0257; A61B2562/04; A61B2562/046
Claims Analysis
Total Claims: 10
Claim 1
Independent Claim
203 words
A proximity detection system for indicatinG the relative motion of animate objects comprising: a plurality of inductive coil sensors in a series configuration, a base, means for evenly positioning and distributing said plurality of inductive coil sensors on said base to permit said animate objects to traverse the magnetic field of said inductive coil sensors. an oscillator having an inductive/capacitance resonant circuit, means collectively connecting said inductive coil sensors to said oscillator as the inductive portion of said resonant circuit, a source of power electrically connected to and exciting said oscillator to produce an AC voltage across said coils, said voltage having a relative value that is directly related to Q value of said inductive coil sensors and the degree of inductive coupling between said coils and the Q value of said inductive coils with a nonideal dielectric object in the proximity of said coils, means for predetermining the Q value of said coils and the Q value of said coils when said objects are sensed, an amplification means having said voltage across said coils connected thereto, and an indication means having the output of said amplification means connected thereto indicative of said predetermined values representative of the presence of said animate objects.
Claim 2
Dependent Claim
203 words
A proximity detection system for indicatinG the relative motion of animate objects comprising: a plurality of inductive coil sensors in a series configuration, a base, means for evenly positioning and distributing said plurality of inductive coil sensors on said base to permit said animate objects to traverse the magnetic field of said inductive coil sensors. an oscillator having an inductive/capacitance resonant circuit, means collectively connecting said inductive coil sensors to said oscillator as the inductive portion of said resonant circuit, a source of power electrically connected to and exciting said oscillator to produce an AC voltage across said coils, said voltage having a relative value that is directly related to Q value of said inductive coil sensors and the degree of inductive coupling between said coils and the Q value of said inductive coils with a nonideal dielectric object in the proximity of said coils, means for predetermining the Q value of said coils and the Q value of said coils when said objects are sensed, an amplification means having said voltage across said coils connected thereto, and an indication means having the output of said amplification means connected thereto indicative of said predetermined values representative of the presence of said animate objects.
Claim 3
Dependent Claim
54 words
A system as set forth in claim 1 wherein said amplifier output is a voltage signal of varying duration and wherein said system further includes a means to convert the amplified output of varying duration to a uniform pulse of predetermined duration, said conversion means connected between said amplification means and said indication means.
Claim 4
Dependent Claim
29 words
A system as set forth in claim 2 wherein said means to convert said varying duration voltage to a uniform pulse includes a trigger circuit and a multivibrator circuit.
Claim 5
Dependent Claim
53 words
A system as set forth in claim 1 wherein the induced voltages in the inductive coil sensors are proportional to the frequency of said oscillators and means to vary the resonant frequency of said circuit to control the sensitivity of said circuit to said nonideal dielectric objects in the proximity of said coils.
Claim 6
Dependent Claim
49 words
A system as set forth in claim 4 wherein said means to vary said resonant frequency decreases said resonant frequency to decrease said sensitivity below that of said nonideal dielectric objects in the proximity of said coils and means connected to said animate objects to increase the sensitivity thereof.
Claim 7
Dependent Claim
40 words
A system as set forth in claim 1 wherein said coils are wound as flat spiral coils and positioned coplanar with said supporting base to provide uniform sensitivity to nonideal dielectric objects traversing the perpendicular magnetic field of said coils.
Claim 8
Dependent Claim
54 words
A system as set forth in claim 1 wherein to equalize the sensitivity of said inductive coils said coils are wound in pairs with the last of said series and the first of said series, the second and the second from the last, the third and the third from the last, etc. wound together.
Claim 9
Dependent Claim
39 words
A system as set forth in claim 6 wherein said supporting base is an electrically conductive plate operative to minimize the electromagnetic disturbances having frequency components close to the resonance frequency of said inductance capacitance circuit of said oscillator.
Claim 10
Dependent Claim
46 words
A system as set forth in claim 8 wherein said electrically conductive plate further includes a plurality of cavities of a diameter greater than the diameter of said flat wound coils, and means individually positioning in separate cavities of said electrically conductive plate said wound coils.
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) | 1974-08-30 | 1975-03-01 | 1975-08-31 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1978-08-30 | 1979-03-01 | 1979-08-31 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1982-08-30 | 1983-03-01 | 1983-08-31 | $7700.00 | Window Closed / Lapsed |