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Browse Prior Art Database

Two Depression Level Pushbutton Switch

IP.com Disclosure Number: IPCOM000084368D
Original Publication Date: 1975-Nov-01
Included in the Prior Art Database: 2005-Mar-02
Document File: 2 page(s) / 52K

Publishing Venue

IBM

Related People

Kroeker, EB: AUTHOR [+2]

Abstract

Linear depression of a pushbutton causes two separate reed switches to be tripped upon resultant rotation of a connected wheel. Upon release of the pushbutton, the wheel rotates in the reverse direction, but the reed switches are not again tripped.

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Two Depression Level Pushbutton Switch

Linear depression of a pushbutton causes two separate reed switches to be tripped upon resultant rotation of a connected wheel. Upon release of the pushbutton, the wheel rotates in the reverse direction, but the reed switches are not again tripped.

In Fig. 1, depression of pushbutton 1 against spring 2 causes wheel 3 to rotate a first extent in a clockwise direction. During this first extent of rotation, magnet 4 on wheel 3 will trip switch 5. Upon continued rotation of wheel 3, tab 6 will contact and act against spring 7. Further depression of pushbutton 1 will then be against springs 2 and 7. Also, stop 8 on wheel 3 will have come into contact with throw arm 9 which is freely rotatable about the same axis as wheel 3.

The outer end of arm 9 is in frictional contact with restraint 10. It will remain in the position shown in Fig. 2 until pushbutton 1 is further depressed. When further depressed, wheel 3 will further rotate in a clockwise direction. Lug 8 will then cause arm 9 to rotate along and against restraint 10 to the position shown in Fig. 3. At this time, reed switch 11 will be tripped.

Upon release of pushbutton 1, wheel 3 will rotate in a counter-clockwise direction until lug 12 picks up arm 9. At this time, magnet 4 will be in a position to again trip switch 5. This is prevented due to the presence of arm 9.

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