Abstract: In the setting operation conducted by the handle 90 which is an operating section, an upper portion of the portion 26a′ of the slidable T-post 26 is pushed by the end portion of the cam 90b, and the slidable T-post 26 is moved. In accordance with the movement of the card 26, the suction cup block 23 is elastically deformed, and the suction cup 23b is held by the body 24 by a holding force of the suction cup 23b. The body 24 is composed of a porous body, and air flows from the ventilation hole 29 into a space formed between the suction cup 23b and the body 24, via the body 24. The slidable T-post 26 is biased ahead by the return spring 27. When the releasing operation is conducted by the handle 90, the cam 90b is rotated, and the end portion of the cam 90b is separated from the end of the portion 26a′ to be pushed.

Abstract: An electromagnetic relay assembly includes an actuator unit and at least one switch unit detachably connected with the actuator unit. The actuator unit includes an actuator casing accommodating therein an electromagnetic assembly and a movable actuator frame magnetically attracted by the electromagnetic assembly to move between first and second positions. The switch unit Includes a switch casing accommodating therein a switch assembly capable of selectively assuming one of an ON state in response to movement of the movable actuator frame from the first position to the second position and an OFF position in response to movement of the movable actuator frame from the second position to the first position. The actuator casing and the switch casing have mating engagement members by which the actuator unit and the switch unit can be separably connected together while the movable actuator frame in the actuator unit can be drivingly coupled with the switch assembly In the switch unit.

Abstract: A damper is provided by a plurality of chambers defined between stacked thin sheet members and containing a fluid for flowing therein through a communicating section, the chambers being made to be of a small height in the direction perpendicular to the plane of the sheet members and to form a buffer section with at least one of the chambers. With such damper employed in electromagnet assemblies and eventually relays including the assemblies, they can be sufficiently minimized in size, and their manufacture can be also made extremely easier.

Abstract: An electromagnetic relay includes a pair of contacts of high fusion-bonding resistance and a further pair of contacts of low contact resistance, which pairs being connected mutually in parallel relationship, with an actuator of an electromagnet unit interposed between them and respectively having a movable contactor carrying a movable contact of the pair and provided for contact opening and closing with respect to a stationary contact of the pair by means of the actuator of the electromagnet unit, whereby the pair of contacts of low contact resistance can be prevented from causing any fusion-bonding and any temperature rise around the pair can be effectively restrained.