Editing Push button switch by Kotaroh Tsutsui

{{infobox patent
| image     = [[file:4249053-6.png|frameless]]
| country   = US
| number    = US4249053
| inventor  = Kotaroh Tsutsui
| issued    = 3 February 1981
| assignee  = [[Alps Electric]]
| reference = {{cite patent|number=US4249053}}
}}

'''Push button switch''' with feedback mechanism is an invention by Kotaroh Tsutsui that introduced the [[Switch_terminology#Switch_characteristics|tactility]] that most switches are known to provide. The assignee was [[Alps Electric|Alps Electric Co., Ltd.,]] and the invention was granted patent number US4249053 on 1984. It features a cam, in which after depression or release of the plunger, it slides in a carrier, providing the operator with tactile feedback. <ref name=alps>{{ cite patent | country = US | number = 4249053| status = patent | title = Push button switch| pubdate =  | gdate = 3 February 1981| fdate = 4 October 1979| pridate =  | inventor =   Kotaroh Tsutsui| invent1 =  | invent2 =  | assign1 = Topre Corporation | assign2 =  | class = }}</ref>

==Description==

'''Keyboard switch'''

* Inventor: Kotaroh Tsutsui
* Filing date: 4 October 1979
* Issue date: 3 February 1981
* Assignee: [[Alps Electric|Alps Electric Co., Ltd.]]

==Claims of the invention==

The claims of the invention are as follow:

#A push-button switch comprising:
##(a) a housing; 
##(b) a slider having a cam groove for obtaining a tactile feedback feel;
##(c) a return spring for the slider;
##(d) an insulating substrate fixe to said housing and formed with fixed contacts adapted to slidingly engage said movable contacts;
##(e) a plurality of terminals extending externally of said housings; 
##(f) a cover member fixed to said housing;
##(g) a cam follower with one end supported in a cantilever fashion and the other end held slidable on the cam groove of the slider;
##(h) a wire spring 
##(i) a protuberant strip provided on said insulating substrate and which presses a rear part of the cam follower.
# A push switch according to claim 1., wherein said slider has a plunger, the pair of movable contact holding portions being disposed on respective sides of said plunger;
# A push switch according to claim 3, wherein each of said pair of movable contact-holding portions is formed into a substantially cubic shape;
# A push switch according to claim 4, wherein said movable contacts and a coiled spring for biasing them upwards are received.

==Referenced by==

*  US4514608 Taneo Murata ''[[Locking type pushbutton switch]]'' issued 30 April 1985; assigned to [[Alps Electric]]
* US4531032 Taneo Murata ''Locking type pushbutton switch'' issued 23 July 1985; assigned to [[Alps Electric]]
* US6002093 James D. Curlee; Robert D. Hrehor ''Button with flexible cantilever''  issued on 14 December 1999; assigned to Dell Usa, L.P.

==Images==

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==References==
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[[Category:Patents]]