Editing Push button switch by Katsuyuki Matsuo

{{ Infobox patent
 |image         = [[file:4186290.png|frameless]]
 |country	= US
 |number	= 4186290
 |inventor	= Katsuyuki Matsuo
 |date		= 29 January 1980
 |assignee	= [[Alps|Alps Electric Co., Ltd.]]
 |reference     = {{cite patent|number=US4186290}}
 |product       = [[Alps SKFF series]]
 }}

'''Push button switch''' is an inverted leaf spring which is housed in a frame opposite from variable power contact mechanisms that have a plurality of fixed terminals supported by a switch block. Among its main features, was the stroke improvement of the keytops, a revised frame, and the adaptation of these contact mechanisms to operate under different magnitudes of power. The patent number 4186290 for the invention was granted in 1980.  <ref> {{cite patent | country = US | number = 4186290 | status = patent | title = Push button switch | pubdate =  | gdate = 29 January 1980 | fdate = 26 December 1978 | pridate =  | inventor = Katsuyuki Matsuo | invent1 =  | invent2 =  | assign1 = [[Alps|Alps Electric Co.,Ltd.]] | assign2 =  | class = }} </ref>

==Description==

'''Push button switch'''

* Inventor: Katsuyuki Matsuo
* Application number: 973442
* Patent number: 4186290
* Filing date: 26 December 1978
* Issue date: 29 January 1980

==Cited patents==

* {{cite patent |country = US |number = 2301874	|fdate = Sep 30, 1940	|gdate = Nov 10, 1942	 	|title =Clickek plunger switch}}
* {{cite patent |country = US |number = 2420880	|fdate = Apr 12, 1944	|gdate = May 20, 1947		|title =Snap switch}}
* {{cite patent |country = US |number = 2524411	|fdate = Apr 1, 1949	|gdate = Oct 3, 1950		|title =Electric snap switch}}
* {{cite patent |country = US |number = 2583756	|fdate = Nov 16, 1948	|gdate = Jan 29, 1952		|title =Snap switch}}
* {{cite patent |country = US |number = 3708635	|fdate = Jun 17, 1971	|gdate = 1973		|title =Multiple switch assembly with improved reciprocating leaf spring contact cam actuator}}
* {{cite patent |country = US |number = 3787653	|fdate = Nov 24, 1971	|gdate = Jan 2, 1974		|title =Electrical switch assembly}}
* {{cite patent |country = US |number = 3965320	|fdate = Oct 17, 1974	|gdate = Jun 22, 1976	|assign1 =Molex Incorporated	|title =Push button switch}}
* {{cite patent |country = US |number = 4129764	|fdate = Jul 14, 1977	|gdate = Dec 12, 1978	Alps Electric Co., Ltd.	|title =Push switch}}

==Referenced by==

* {{cite patent |country = US |number = 4398070	|fdate =Dec 23, 1981	|gdate =Aug 9, 1983	|assign1 = Alps Electric Co., Ltd. |title =	Two-motion push-button switch}}
* {{cite patent |country = US |number = 4426559	|fdate =Dec 23, 1981	|gdate =Jan 17, 1984	|assign1 = Alps Electric Co., Ltd. |title =	Push button switch having two resilient contacts operated at different times}}
* {{cite patent |country = US |number = 4447687	|fdate =Sep 10, 1982	|gdate =May 8, 1984	|assign1 = Marquardt GmbH |title = Pushbutton switch}}
* {{cite patent |country = US |number = 4642433	|fdate =Jul 11, 1985	|gdate =Feb 10, 1987	|assign1 = Alps Electric Co., Ltd. |title =	Pushbutton switch with aural confirmation of operation}}
* {{cite patent |country = US |number = 4647742	|fdate =Jul 16, 1984	|gdate =Mar 3, 1987	|assign1 = Omron Tateisi Electronics Co.	|title = Alternate on-off switch mechanism}}
* {{cite patent |country = US |number = 4760225	|fdate =Jan 14, 1987	|gdate =Jul 26, 1988	|assign1 = Alps Electric Co., Ltd. |title =	Push button switch having a frame member for preventing solder penetration of switch contacts}}
* {{cite patent |country =US |number = 5724719	|fdate =Dec 11, 1995	|gdate =Mar 10, 1998	|assign1 = ITT Corporation |title =	Method of manufacturing a steering column stalk switch apparatus}}
* {{cite patent |country =US |number = 5852867	|fdate =Jun 5, 1995	|gdate =Dec 29, 1998	|assign1 = ITT Industries, Inc.	|title = Method of manufacturing a steering column stalk switch apparatus}}
* {{cite patent |country = US |number = D413091	|fdate =Sep 25, 1995	|gdate =Aug 24, 1999	|assign1 = ITT Industries, Inc.	|title = Steering column stalk switch}}

==Images==

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==References==
<references/>

[[Category:Patents]]