Browse Prior Art Database

Adapter for Concurrent Operation of Units Using Different Power Source Frequencies

IP.com Disclosure Number: IPCOM000050622D
Original Publication Date: 1982-Nov-01
Included in the Prior Art Database: 2005-Feb-10
Document File: 2 page(s) / 34K

Publishing Venue

IBM

Related People

Zrubek, RL: AUTHOR

Abstract

Primary and secondary units intended for concurrent, cooperative operations where the power source frequencies for the units differ are inter-locked by a relay which requires the presence of primary source power to couple secondary source power to the secondary unit.

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Adapter for Concurrent Operation of Units Using Different Power Source Frequencies

Primary and secondary units intended for concurrent, cooperative operations where the power source frequencies for the units differ are inter-locked by a relay which requires the presence of primary source power to couple secondary source power to the secondary unit.

Primary unit 10 and secondary unit 11 are intended for concurrent, cooperative operation, such as between a copier and collator, tape control unit and tape drive, computer and printer, and similar combinations. Primary unit 10 is powered by a first power source 15 shown as a 60 Hz source, whereas secondary unit 11 operates from a different frequency, such as power source 16 at 50 Hz in this example. Interface adapter unit 20 includes relay 21 connected to the 60 Hz primary power source 15 through unit 10. When unit 10 is powered up, the presence of 60 Hz power causes normally open contacts 22 and 23 to close, thereby coupling output power from source 16 to secondary unit 11. Displays 25 and 26 are lamps and/or meters to indicate the presence of input and output power for secondary unit 11 relative to adapter 20. Parallel attachment of both 10 and 20 to 60 Hz source 15 is possible, if desired.

Loss of primary power 15 automatically uncouples secondary power source 16 from secondary unit 11. Adapter 20 is also useful for allowing testing of secondary units having different power source design relative to the controlling...