Browse Prior Art Database

Contactless Current Switching Devices

IP.com Disclosure Number: IPCOM000098148D
Original Publication Date: 1960-Feb-01
Included in the Prior Art Database: 2005-Mar-07
Document File: 2 page(s) / 40K

Publishing Venue

IBM

Related People

McKendry, FJ: AUTHOR

Abstract

A latch and a trigger are provided by placing a Hall element in a gap of a magnetic core and providing feedback from the Hall element to windings on the core.

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Contactless Current Switching Devices

A latch and a trigger are provided by placing a Hall element in a gap of a magnetic core and providing feedback from the Hall element to windings on the core.

The latch is turned on by applying a negative going pulse to the set input. This pulse through diode; and winding 2 induces magnetization in core 3 to cause current to flow through the Hall element 4 to the on output. The current from the on output is fed back through diode 5 and through winding 2 to maintain the latch on .

The latch is reset by applying a negative going pulse to the reset input to supply current through diode 6 and winding 7. This reset current reverses the magnetization in core 3 to switch the current in the Hall element through resistor 8 and thus turn the latch off. The trigger operates in a similar manner but feeds current back from the 0 out to the reset winding. The core material is preferably of the square loop variety.

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