| Patent Number |
Title Of Patent |
Date Issued |
| 5512822 |
Magnetic sensor with member having magnetic contour antisotropy |
April 30, 1996 |
| A magnetic sensor includes a member having a magnetic contour anisotropy. A counterpart yoke is disposed above a magnet. The thickness of the counterpart yoke is equal to or slightly smaller than the resolution. The counterpart yoke has a magnetic contour anisotropy for restraining the |
| 5231359 |
Ceramic resonance type electrostatic sensor apparatus |
July 27, 1993 |
| A ceramic resonance type electrostatic sensor apparatus with an oscillator at a fixed frequency including a first ceramic resonator which has a fixed resonance frequency, a detecting unit for detecting a capacitance between the detecting unit and an object to be detected, a resonating ci |
| 5198777 |
Paper thickness detecting apparatus having a resonator with a resonance point set by a capacitan |
March 30, 1993 |
| Apparatus for detecting thickness which includes an electrode detecting unit including a ground electrode and a detecting electrode. The electrodes oppose each other along a paper path. An oscillating circuit provides an oscillation frequency signal. A resonant circuit, having a reso |
| 5128622 |
Multi-channel electrostatic sensor apparatus |
July 7, 1992 |
| Disclosed is a multi-channel electrostatic sensor apparatus including a main oscillation circuit; a plurality of pull-in type sub-oscillation circuits which are adapted to synchronize with the main oscillation circuit to generate sub-frequency signals whose frequency is equal to the |
| 4745284 |
Infrared ray detector |
May 17, 1988 |
| A pyroelectric infrared ray detector of the so-called dual structure for detecting an intruder or the like through differential output of two pyroelectric infrared ray detecting elements connected in parallel or series to each other. The infrared ray detector comprises a pair of pyro |
| 4692619 |
Pyroelectric type detecting device |
September 8, 1987 |
| A pyroelectric type detecting device including a converging mirror, a pyroelectric type sensor element for detecting light converged by the converging mirror, an amplifier for amplifying an output signal of the sensor element and a casing for accommodating the sensor element and the |
| 4145687 |
Keyboard switch circuit for use in a matrix which has a series circuit including a reluctance el |
March 20, 1979 |
| A keyboard switch circuit comprises a first plurality of terminals associated with m rows and a second plurality of terminals associated n columns. A plurality of series circuits each including a reluctance element and a diode are connected between the terminals associated with the r |
| 4117523 |
Magnetic sensor having a hollow housing sealed with a shield cap |
September 26, 1978 |
| A magnetic sensor includes a housing in which flux producing means which comprises an electromagnet or a permanent magnet is received. A pair of magnetoelectric transducer elements are secured to a surface of the flux producing means which represents a magnetic pole, with a given spacing |
