Abstract: A disk-shaped object detecting system detecting the presence or absence and position of a disk-shaped object such as semiconductor wafers or magnetic disks includes a light emitting element emitting light toward a circumferential edge of the object while being moved across the object, a light receiving element receiving the light reflected on the circumferential edge of the object while being moved across the object together with the light emitting element, delivering first and second light signals each according to the received light, the first and second light signals having a ratio depending upon at what position between opposite ends the light receiving element receives the light reflected on the circumferential edge of the object, the first and second signals having a magnitude relation which is reversed when the light reflected on the circumferential edge of the object has been moved from one end side to the other end side of the light receiving element, an AND processing section supplied with the first

Abstract: A signal processor for a sensor includes an enclosure and a cable holder disposed in the enclosure and having a first through hole and a second through hole contiguous to the first through hole. The cable holder is moved when a lever is manipulated. A first terminal is disposed in the enclosure so as to intersect at a right angle to the first through hole and a second terminal is disposed in the enclosure so as to intersect at a right angle to the second through hole. A coaxial cable for connecting between the signal processor and the sensor is inserted into the first and second through holes in turn in the state that an exposed shield wire is folded up along an outer insulating sheath of the cable. When the cable holder is moved upon manipulation of the lever, the first terminal is moved into the first through hole, coming into contact with the exposed shield wire.

Abstract: An electrical connector for interconnecting parallel multiconductor cables includes a housing having a first cable receiving section for receiving a parallel multiconductor main cable and a second cable receiving section for receiving a parallel multiconductor branch cable respectively. Contact members each extend through the housing and have terminal portions projecting from the first and second cable receiving sections so that the main and branch cables are press fitted into the terminal portions. A pair of covers are attached to the housing and each have cable receiving sections pressing the main and branch cables against the first and second cable receiving sections respectively in the condition that the covers are attached to the housing. The housing is engaged with each cover in a state that each cover has been attached to the housing.