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Relay/Ricoh
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Japan.
Relay was established 1951 and later amalgamated with Ricoh. This company appears to have made a number of slide rules which
carried other companies brand names.
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Relay Slide Rules on this site
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Relay Miniature
Relay 82
Relay 105
Relay 150
Relay 153
Relay 252
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Other brands made by Ricoh/Relay
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The Relay/Ricoh group made a range of slide rules under other names. Sometimes this was a slide rule made to the specific
requirements of another company which produced slide rules and
and in other cases it was a distribution agreement. Some of the brands/rules suspected or confirmed are:
- Alvin (models beginning with1000)
- Charvoz (SR 201 and maybe others)
- Compass
- Dietzgen (all B series, maybe others)
- Eagle
- Engineers
- Jason
- Lafayette
- Lietz (some, not all)
- Lutz
- Micronta
- Paleo
- Pickett (B1)
- Sans & Streiffe
- SIC (Scientific Instruments Co.)
- Skyline
- Wallace & Wallace
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