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Browse Prior Art Database

Switch

IP.com Disclosure Number: IPCOM000093187D
Original Publication Date: 1967-Jun-01
Included in the Prior Art Database: 2005-Mar-06
Document File: 2 page(s) / 25K

Publishing Venue

IBM

Related People

Harper, LR: AUTHOR

Abstract

The switch comprises a pi-wound coil consisting of three sections 10, 12, and 14. The coil is wound on hollow phenolic form 16. Outer coils 10 and 14 are connected in a bucking fashion. Powdered iron slug 18 is placed internally in form 16. Slug 18 is connected by coupling 20 to the moving part of the switch not shown. Center coil 12 is fed a signal from RF source 22. Transistor 24 is connected to sense the output across coils 10 and 14. This is effected by coupling one end of coil 10 to the base of transistor 24 and one terminal of the RF source to the emitter of transistor 24. The output is taken between the collector of transistor 24 and the end of coil 14 at terminals 26 and 28 to provide an on-off switch.

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Switch

The switch comprises a pi-wound coil consisting of three sections 10, 12, and 14. The coil is wound on hollow phenolic form 16. Outer coils 10 and 14 are connected in a bucking fashion. Powdered iron slug 18 is placed internally in form 16. Slug 18 is connected by coupling 20 to the moving part of the switch not shown. Center coil 12 is fed a signal from RF source 22. Transistor 24 is connected to sense the output across coils 10 and 14. This is effected by coupling one end of coil 10 to the base of transistor 24 and one terminal of the RF source to the emitter of transistor 24. The output is taken between the collector of transistor 24 and the end of coil 14 at terminals 26 and 28 to provide an on-off switch. If both polarities of the output are needed to produce a three- position switch, the reverse polarity of the input signal is fed to the emitter of a second transistor to sense the other polarity.

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