Editing Stackpole torsion spring

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{{infobox dswitch
| image name          = Stackpole_discreet_overhead_angled.JPG
| manufacturer        = [[Stackpole]]
| switch type         = Linear
| actuation force     = 
| contact mechanism   = 
| switch mount        = [[Switch mount#PCB mount|PCB mount]]
| patents             = [http://www.google.com/patents/US3767878 US3767878] (1972)<br>[http://www.google.com/patents/US3924089 US3924089] (1974)<br>[http://www.google.com/patents/US4119821 US4119821] (1977)
}}

'''Stackpole torsion spring''' and formerly '''Stackpole discrete switch''' are provisional names for a family of low-profile cruciform-mount keyboard switches from Stackpole that use torsion springs for the movable contact. The torsion spring appears to allow for overtravel.

A patent for the switch was filed in 1972. A later patent was filed in 1974 which introduced a revision to the switch: the ends of the horizontal spring—used as a bridging electrical contact—were capped with conductive silicone rubber to provide for increased longevity.

==Keyboards==
*Some [[Atari 800]] computers, used for the special keys on the right (not confirmed)

==Gallery==
Pictures of the Stackpole discreet key switches.  These are odd in that these switches are oblong so there is a short side and a long side.
<gallery widths=250 heights=187>
File:Stackpole_discreet_overhead_angled.JPG|Overhead angled view
File:Stackpole_discreet_long_side.JPG|Long side with no spring or key cap
File:Stackpole_discreet_short_side.JPG|Short side with no spring or key cap
File:Stackpole_discreet_long_side_with_cap_and_spring.JPG|Long side with spring and key cap complete
File:Stackpole_discreet_short_side_with_cap_and_spring.JPG|Short side with spring and key cap complete
File:Stackpole_discreet_external_parts.JPG|External parts
File:Stackpole_discreet_bottom_with_markings.JPG|Bottom with Stackpole markings
</gallery>

==External links==
*TechDose — [http://www.techdose.com/repairlog/Fixing-a-Stackpole-Momentary-Keyboard--Key-Pad-Switch/457/page1.html Fixing a Stackpole Momentary Keyboard / Key Pad Switch] Dated 2012-05-24. Retrieved 2015-08-02.
*Deskthority - [https://deskthority.net/photos-f62/unknown-keyboard-with-stackpole-switches-from-1974-t15282.html Keyboard mechanism with Stackpole discreet switches]
[[Category:Stackpole switches]]
[[Category:Linear switches]]
[[Category:Metal contact switches]]
[[Category:List of all keyboard switches]]