US3611345A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Motion detector
Assignee: Intron International Inc
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Filing: 1969-04-16
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Granted: 1971-10-05
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Expires: 1989-04-16
Abstract
Abstract A mobile body is confined within a spherical or spheroidal chamber which forms part of an electric monitoring circuit, displacement of the body from an initial position resulting in changes of circuit impedance (through variations in conductance, capacitance or inductance) which are registered on an indicator.
Inventors
- 👤 Robert H Pintell
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 22:33
CPC Classifications
G; G01; G01V; G01V1/00; G01V1/16; G08; G08B; G08B13/00; G08B13/02; G08B13/14; G08B13/1436; G08B13/22; G08B13/24
Claims Analysis
Total Claims: 6
Claim 1
Independent Claim
83 words
A motion detector comprising a round mobile body capable of modifying an electromagnetic field, a structure forming a confining chamber around said body with a continuously curved inner peripheral surface in rolling contact therewith, circuit means including a plurality of leads terminating adjacent said structure for setting up an electromagnetic field adapted to be disturbed by a rolling movement of said body on said inner peripheral surface from an initial position, and indicator means connected to said circuit means for registering such movement.
Claim 2
Dependent Claim
83 words
A motion detector comprising a round mobile body capable of modifying an electromagnetic field, a structure forming a confining chamber around said body with a continuously curved inner peripheral surface in rolling contact therewith, circuit means including a plurality of leads terminating adjacent said structure for setting up an electromagnetic field adapted to be disturbed by a rolling movement of said body on said inner peripheral surface from an initial position, and indicator means connected to said circuit means for registering such movement.
Claim 3
Dependent Claim
14 words
A motiOn detector as defined in claim 1 wherein said chamber is spherical .
Claim 4
Dependent Claim
37 words
A motion detector as defined in claim 1 wherein said structure is nonmagnetic and said circuit means includes a plurality of mutually orthogonal induction coils connected to said leads adjacent said chamber, said body being magnetically permeable.
Claim 5
Dependent Claim
25 words
A motion detector as defined in claim 1 wherein said circuit means includes capacitive elements connected to said leads and disposed close to said chamber.
Claim 6
Dependent Claim
19 words
A motion detector as defined in claim 1 wherein said chamber is airtight and substantially free of oxidizing gases.
References Cited (Backward Citations)
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1974-10-04 | 1975-04-05 | 1975-10-05 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1978-10-04 | 1979-04-05 | 1979-10-05 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1982-10-04 | 1983-04-05 | 1983-10-05 | $7700.00 | Window Closed / Lapsed |