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| Number | Title | Issue Date |
| 6333476 | Push-button switch The present invention, the objective of which is to provide a push-button switch realized in a way to be held lightly with a small force at the position where the push button is pressed, and obtain a large returning force when the pressing force of the pu... | 12/25/2001 |
| 5994652 | Push button switch assembly with interlocking element A push-button switch of simple structure and highly reliable operation capable of safely stopping equipment even when the push button of the push-button switch fails to return to its normal position while the push-button switch for operating equipment is ... | 11/30/1999 |
| 5965854 | Multiple push-button switch assembly with interlocking mechanism This invention is an interlocking device for a push-button switch in compact size and with a mechanically simple construction, capable of realizing interlocking of a push-button switch having a pair of push buttons facing each other and being downwardly m... | 10/12/1999 |
| 5932854 | Multiple push-button assembly with interlocking mechanism An interlocking device for a push-button switch in compact size and with a mechanically simple construction, capable of achieving the interlocking of a push-button switch having a pair of push buttons facing each other and being downwardly movable by pres... | 08/03/1999 |
| 5576525 | Push button detent or retaining mechanism for push button switch A push button is provided with a steel ball pressed by a spring. A separate retaining spring retains the steel ball in a gap between coils of the retaining spring. The push button thus is retained at prescribed pressed down positions.... | 11/19/1996 |
| 5473203 | Push-button switch device A switch unit receive an AC signal and includes first and second push-button switches and at least one rectifying diode. Each of the first and second push-button switches is a 2-stage switch or a 3-stage switch. The first and second push-button switches a... | 12/05/1995 |
| 5382836 | Push-button switch device A switch unit receive an AC signal and includes first and second push-button switches and at least one rectifying diode. Each of the first and second push-button switches is a 2-stage switch or a 3-stage switch. The first and second push-button switches a... | 01/17/1995 |
| 5321311 | Apparatus for detecting erroneous operation in a non-contact push-button switch To detect a faulty operation in a non-contact switch, a pulse signal is applied to the light emitting element of the non-contact switch. The input pulse signal is compared with an output signal generated by a light receiving element of the non-contact swi... | 06/14/1994 |
| 5272383 | Method and apparatus for preventing erroneous operation in non-contact push-button switch To detect a faulty operation in a non-contact switch, a pulse signal is applied to the light emitting element of non-contact switch. The thus input pulse signal is compared with an output signal generated by a light receiving element of the non-contact sw... | 12/21/1993 |
| 5243291 | Electromagnetic contactor deposition detecting apparatus which detects load current and switch current A circuit is provided for detecting the deposition of an electromagnetic contactor which opens and closes a drive circuit connecting a power source to a load. A load current of the drive circuit and an operating current for operating the electromagnetic c... | 09/07/1993 |
| 5045647 | Interlocking device for push-button switch A push button switch having an interlocking device, the switch having a pair of two spaced adjacent push buttons each movable downwardly from an inoperative to an operative position, a pin position between the two push buttons and having a horizontal long... | 09/03/1991 |
| 4816671 | Push-button switch with multi-stage action A push-button switch including a housing, at least one pair of push-buttons movably mounted in the housing, a plurality of light-emitting elements, a plurality of photo-sensors arranged to receive light from the light-emitting elements and light blocking ... | 03/28/1989 |
