Abstract: A multistage switch includes a switch push button. A magnet is disposed in a recess of the inner wall surface of the switch push button. The multistage switch further includes a magnetic sensor, and the magnetic sensor includes a substrate. Two magnetoelectric transducers are mounted on a surface of the substrate, and are disposed so as to face the magnet.

Abstract: A multistage switch includes a switch push button. A magnet is disposed in a recess of the inner wall surface of the switch push button. The multistage switch further includes a magnetic sensor, and the magnetic sensor includes a substrate. Two magnetoelectric transducers are mounted on a surface of the substrate, and are disposed so as to face the magnet.

Abstract: Disclosed is a small-sized magnetoresistance element array having a plurality of arranged magnetoresistance elements and provided with excellent operating efficiency which facilitates connection of each magnetoresistance element by virtue of comb terminals and U-shaped terminals provided on the inner walls of the stem. In the magnetoresistance element array, the magnet detectors are positioned at the right three-dimensional position, thereby preventing crosstalk or deviation in the reading timing at the time of reading a magnetic code. Guides are provided on the top walls of the stem so as to regulate the position at which the magnetic detector is secured to the top portion of the magnet.The magnetoresistance element array is used for a magnetic sensor for reading information recorded as a magnetic code from a magnetic code recorded medium such as a magnetic card.

Abstract: 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 pyroelectric infrared ray detecting elements having substantially identically directed light receiving surfaces and electrically connected to each other and a shield member arranged in front of the said light receiving surfaces to partially shield the infrared ray detecting elements against incidence of infrared light. The shield member is arranged in a plane extending between the infrared ray detecting elements to separate the same on both sides thereof.

Abstract: 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 amplifier. The sensor element has a window for receiving the light and the casing is rotatably mounted on a portion of the converging mirror such that the window of the sensor element confronts a mirror member of the converging mirror.