Patent US3922639A successfully refreshed from Google Patents.
US3922639A
Expired / Lapsed
US
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Multiple input signal detecting device
Assignee: Toyo Tire Corp
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Filing: 1974-08-27
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Granted: 1975-11-25
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Expires: 1994-08-27
Abstract
Abstract A device for detecting multiple input signals, which comprises a signal detecting circuit including a plurality of signal carrier lines for carrying a plurality of AC input signals changeable in electric characteristics such as levels, phases or frequencies upon occurrence of abnormality, and a multi-input transformer having a plurality of primary windings connected to resepective signal carrier lines and at least one secondary widning including an output secondary winding which, all of the windings being wound around an iron core having a common magnetic circuit, and an output circuit for treating an output from the output secondary winding of the multi-input transformer. The primary windings in the signal detecting circuit are wound to magnetically cancel the magnetic flux of the AC input signals when all of the signals are normal, and are coupled between the signal carrier lines and the output circuits to produce an output at the output secondary winding upon upsetting of the balance required for magnetic cancellation when at least one of the AC input signals becomes abnormal.
Inventors
- 👤 Yoichi Shimahara
- 👤 Takashi Shimada
- 👤 Shigeki Kitamura
- 👤 Hiroshi Miyanishi
- 👤 Hiroshi Senda
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 04:33
CPC Classifications
B; B60; B60C; B60C23/00; B60C23/02; B60C23/04; B60C23/0408; B60C23/0422; B60C23/0427; B60C23/043
Claims Analysis
Total Claims: 10
Claim 1
Independent Claim
167 words
A device for detecting multiple input signals, which comprises a signal detecting circuit including a plurality of signal carrier lines for carrying a plurality of AC input signals changeable in electric characteristics such as levels, phases or frequencies upon occurrence of abnormality and a multi-input transformer having a plurality of primary windings connected to respective signal carrier lines and at least one secondary winding including an output secondary all the windings being wound around an iron core having a common magnetic circuit, and an output circuit for treating an output from said output secondary winding of the multi-input transformer; said primary windings in the signal detecting circuit being wound to magnetically cancel magnetic flux of said AC input signals when all of the signals are kept normal and connected between said signal carrier lines and said output circuits to produce an output at said output secondary winding upon breakage of the balance for magnetic cancellation when at least one of the AC input signals is in abnormality.
Claim 2
Independent Claim
167 words
A device for detecting multiple input signals, which comprises a signal detecting circuit including a plurality of signal carrier lines for carrying a plurality of AC input signals changeable in electric characteristics such as levels, phases or frequencies upon occurrence of abnormality and a multi-input transformer having a plurality of primary windings connected to respective signal carrier lines and at least one secondary winding including an output secondary all the windings being wound around an iron core having a common magnetic circuit, and an output circuit for treating an output from said output secondary winding of the multi-input transformer; said primary windings in the signal detecting circuit being wound to magnetically cancel magnetic flux of said AC input signals when all of the signals are kept normal and connected between said signal carrier lines and said output circuits to produce an output at said output secondary winding upon breakage of the balance for magnetic cancellation when at least one of the AC input signals is in abnormality.
Claim 3
Dependent Claim
54 words
A device according to claim 1, wherein said AC input signals are of an even number, half of either of said signal carrier lines said primary windings are inverted in polarity, and said magnetic cancellation of the magnetic flux caused by said AC input signals is effected at the primary windings of the transformer.
Claim 4
Dependent Claim
74 words
A device according to claim 2, wherein said primary windings are grounded at their respective ends at a reference potential through an impedance connected in common thereto, and said output circuit includes an OR circuit for making logical sum of a signal obtained through detection of an AC signal appearing across the ends of said impedance and a signal obtained through treatment of the output from the output secondary winding of the multi-input transformer.
Claim 5
Dependent Claim
39 words
A device according to claim 2, wherein at least one of the signal carrier lines has an adjusting circuit for adjusting at least one of the levels and the phases of said AC input signals carried by said lines.
Claim 6
Dependent Claim
95 words
A device according to claim 2, wherein said signal carrier lines, said signal detecting circuits and said output circuit are provided on a body of a vehicle and said signal carrier lines are connected to output terminals of transmitter units each composed of a sensor for detecting abnormality in a tire attached to a respective wheel of the vehicle and an AC signal generator provided on the body and adapted to transmit AC signals upoN direct receipt thereof through an electric conductor or indirect receipt thereof by electromagnetic induction from the operation of the sensor.
Claim 7
Dependent Claim
77 words
A device according to claim 1, wherein said signal carrier lines are connected to said signal detecting circuit to apply AC input signals carried by the respective lines to the respective primary windings with a polarity to add their total magnetic flux at the primary windings of said multi-input transformer, and to either the primary windings or the secondary winding is connected an AC power source for cancelling the total magnetic flux of the AC input signals.
Claim 8
Dependent Claim
41 words
A device according to claim 6, wherein at least one of the signal carrier lines is provided with an adjusting circuit for adjusting at least one of the levels and the phases of the AC input signals carried by said lines.
Claim 9
Dependent Claim
93 words
A device according to claim 6, wherein said signal detecting circuit and said output circuit are provided on a body of a vehicle, and said signal carrier lines are connected to output terminals of transmitter units each composed of a sensor for detecting abnormality in a tire attached to a respective wheel of the vehicle or a spare tire, and an AC signal generator provided on the body and adapted to transmit AC signals upon direct receipt through an electric conductor or indirect receipt by electromagnetic induction from the operation of the sensor.
Claim 10
Dependent Claim
242 words
A device according to claim 1, wherein said signal carrier lines are each connected to output terminals of a respective AC signal transmitting unit provided in each of a plurality of rotary tire systems, and comprising an electric winding connected at both its ends to a pressure sensor which is attached to each of said rotary tire systems in a coaxial relation and adapted to be operative in response to an air pressure of the tire, a transmitting coil and a receiving coil both attached to the body of the vehicle in proximity to said electric winding, and a transmitter circuit and a receiver circuit both attached to the body of the vehicle in association with said transmitting coil and said receiving coil, respectively, whereby: a signal from said transmitting coil is transmitted as a change of level to said receiving coil through said electric winding, an input wave-form from said transmitter circuit is superposed onto a noise signal of said receiving coil generated due to a mutual induction other than that caused by a normal signal to be transmitted, and at least one adjustment of a phase adjustment for adjusting phases of the input wave-form and the noise signal to opposite phases and a gain adjustment for making the value of the superposed input and the value of the noise signal coincident with each other is effected; thereby to compensate the mutual induction other than that caused by the normal signal.
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) | 1978-11-24 | 1979-05-26 | 1979-11-25 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1982-11-24 | 1983-05-26 | 1983-11-25 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1986-11-24 | 1987-05-26 | 1987-11-25 | $7700.00 | Window Closed / Lapsed |