US3735244A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Displacement pick-up
Assignee: Daimler Benz AG
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Filing: 1971-09-17
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Granted: 1973-05-22
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Expires: 1991-09-17
Abstract
Abstract An electronic motion pick-up in which a core made of ferromagnetic material and displaceable in accordance with the motion to be measured, is adapted to be immersed into a coil forming part of a tuned circuit of a transistorized oscillator whose rectified output voltage is used as electrical measuring magnitude; the permeability of the core is thereby limited to such a value that the oscillations are not stopped also with the deepest immersion of the coil into the core which is possible during the operation.
Inventors
- 👤 H Gumtau
- 👤 R Kowarsch
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 07:37
CPC Classifications
G; G01; G01D; G01D5/00; G01D5/12; G01D5/14; G01D5/20
Claims Analysis
Total Claims: 23
Claim 1
Independent Claim
188 words
An electronic displacement pick-up in which a core of ferromagnetic material displaceable in a coil means corresponding to the displacement to be measured, influences the amplitude of the electric output signal of an electric circuit means, characterized in that the electric circuit means includes a transistor oscillator means having a tuned circuit means and output means having rectifier means for rectifying the electrical oscillations of the oscillator means, said coil means being a part of said tuned circuit means and the rectified output voltage appearing in the output means serving as an electrical measuring magnitude, and in which the permeability of the core is limited to such a value that the oscillations are not interrupted with the deepest immersion of the core into the coil means, which is possible during the operation, said electric circuit means including electronic and circuit elements arrAnged about said coil means, said coil means being secured in an upright position on a printed circuit plate provided with electric connecting means, the electronic and circuit elements being soldered onto the circuit plate in a substantially upright position and substantially parallel to the coil axis.
Claim 2
Dependent Claim
188 words
An electronic displacement pick-up in which a core of ferromagnetic material displaceable in a coil means corresponding to the displacement to be measured, influences the amplitude of the electric output signal of an electric circuit means, characterized in that the electric circuit means includes a transistor oscillator means having a tuned circuit means and output means having rectifier means for rectifying the electrical oscillations of the oscillator means, said coil means being a part of said tuned circuit means and the rectified output voltage appearing in the output means serving as an electrical measuring magnitude, and in which the permeability of the core is limited to such a value that the oscillations are not interrupted with the deepest immersion of the core into the coil means, which is possible during the operation, said electric circuit means including electronic and circuit elements arrAnged about said coil means, said coil means being secured in an upright position on a printed circuit plate provided with electric connecting means, the electronic and circuit elements being soldered onto the circuit plate in a substantially upright position and substantially parallel to the coil axis.
Claim 3
Dependent Claim
42 words
A displacement pick-up according to claim 1, characterized in that a disk of substantially the same configuration as the printed circuit plate is provided at the opposite end of the coil means, and the entire arrangement is inserted into a cylindrical housing.
Claim 4
Dependent Claim
16 words
A displacement pick-up according to claim 2, characterized in that the housing consists of ferromagnetic material.
Claim 5
Dependent Claim
39 words
A displacement pick-up according to claim 2, characterized in that said circuit plate and said disk are of circular shape with substantially the same diameter, and in that said housing has an internal configuration corresponding to said circular shape.
Claim 6
Dependent Claim
22 words
A displacement pick-up according to claim 4, characterized in that the circular disk is made in one piece with a coil body.
Claim 7
Dependent Claim
22 words
A displacement pick-up according to claim 5, characterized in that the interior space of the housing is filled with a non-conductive material.
Claim 8
Dependent Claim
17 words
A displacement pick-up according to claim 6, characterized in that said non-conductive material is a molded material.
Claim 9
Dependent Claim
41 words
A displacement pick-up according to claim 6, characterized in that the arrangement is inserted into the housing with the disk at its head in such a manner that the printed circuit plate is disposed toward the open end of the housing.
Claim 10
Dependent Claim
38 words
A displacement pick-up according to claim 8, characterized in that the circuit plate is arranged recessed within the housing and that the housing opening is closed off by a cover of ferromagnetic material provided with wire lead-in means.
Claim 11
Dependent Claim
22 words
A displacement pick-up according to claim 6, characterized in that the core is guided from the outside only axially but not laterally.
Claim 12
Dependent Claim
19 words
A displacement pick-up according to claim 10, characterized in that the coil body rests tightly on the circuit plate.
Claim 13
Dependent Claim
38 words
A displacement pick-up according to claim 8, characterized in that the coil body with laterally extending lead-in wires extends through a cover provided at the open end of the housing on the outside of the printed circuit plate.
Claim 14
Dependent Claim
36 words
A displacement pick-up according to claim 8, characterized in that the end of the housing opposite the cover through which extends the core is provided with a thread for the threaded connection to a fixed part.
Claim 15
Dependent Claim
18 words
A displacement pick-up according to claim 13, characterized in that said oscillator circuit means is a capacitive Colpits-oscillator.
Claim 16
Dependent Claim
22 words
A displacement pick-up according to claim 2, characterized in that the interior space of the housing is filled with a non-conductive material.
Claim 17
Dependent Claim
17 words
A displacement pick-up according to claim 15, characterized in that said non-conductive material is a molded material.
Claim 18
Dependent Claim
41 words
A displacement pick-up according to claim 2, characterized in that the arrangement is inserted into the housing with the disk at its head in such a manner that the printed circuit plate is disposed toward the open end of the housing.
Claim 19
Dependent Claim
38 words
A displacement pick-up according to claim 2, characterized in that the circuit plate is arranged recessed within the housing and that the housing opening is closed off by a cover of ferromagnetic material provided with wire lead-in means.
Claim 20
Dependent Claim
22 words
A displacement pick-up according to claim 1, characterized in that the core is guided from the outside only axially but not laterally.
Claim 21
Dependent Claim
19 words
A displacement pick-up according to claim 1, characterized in that a coil body rests tightly on the circuit plate.
Claim 22
Dependent Claim
38 words
A displacement pick-up according to claim 20, characterized in that the coil body with laterally extending lead-in wires extends through a cover provided at the open end of the housing on the outside of the printed circuit plate.
Claim 23
Dependent Claim
36 words
A displacement pick-up according to claim 21, characterized in that the enD of the housing opposite the cover through which extends the core is provided with a thread for the threaded connection to a fixed part.
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) | 1976-05-21 | 1976-11-20 | 1977-05-22 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1980-05-21 | 1980-11-20 | 1981-05-22 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1984-05-21 | 1984-11-20 | 1985-05-22 | $7700.00 | Window Closed / Lapsed |