Litton Systems, Inc.

Ivi Checkmate Corp.

Stephen A Levie

Michael E Hermansen

Gregory John Loxtercamp

Emmett E O'Hare

Ahmad Ghanbarzadeh

Bradley Dale Brown

William E Taylor

A modular terminal apparatus including a core unit interchangeable with a plurality of communication modules.

Modular transaction terminal

A mode detector for microwave oven magnetrons is disclosed including means for sensing interruption of anode current and providing a discrete indication thereof. An alternative embodiment discloses means to count the number of such interruptions. A method of detecting incipient failure of the magnetron is disclosed wherein the discrete output of a mode detector is observed and a determination is made that an incipient failure exists when the mode detector output frequency exceeds a predetermined limit.

Magnetron mode detector

A front programmable timer provides for the programming, selecting, and operating according to desired operating times in a set of input switches for a microwave oven controller. Retention of the times programmed is provided for in the event of loss of power. A TEST mode provides for exercising a visible display, an audible indicator and a microwave command output signal from the controller. A tamper-proof switch assembly is provided to select OPERATE or PROGRAM modes.

Front programmable timer for a microwave oven

A power supply circuit for a microwave oven which includes a magnetron, a transformer, a plural capacitor, and a current rectifier. The power supply circuit is particularly adapted to provide constant power output from the magnetron using either a 50Hz or 60Hz input power by selecting an appropriate one of said plural capacitances.

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Burnsville, MN, United States of America

Stephen A Levie