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FTL Design
History of Technology

Electric Clocks - IBM/ITR Master Clocks
Technical Memos

Scans courtesy of Henry Weiland, reproduced by permission.

For questions on IBM/ITR clocks, or on synchronous chime clocks,
you can email Henry at hweiland@wi.rr.com

Click on each image for a full-size view of the page.

Memo 151 page 1 151 page 2 151 page 3
151 page 4 151 page 5 151 page 6
 
Memo 212 Memo 213
Regulation

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Copyright 2003 FTL Design
Last revised: 18 September 2003