Dubilier capacitance electrical engineer's slide r

Made:
1928 in Derby
maker:
John Davis and Son (Derby) Limited

Dubilier capacitance electrical engineer's slide rule, designed by Philip R. Coursey and manufactured by John Davis & Son (Derby) Ltd., 1928. Used from new by Mr A.E.Bennett chief engineer at Dubliers, electrical component manufacturers at Park Royal West London.

Details

Category:
Mathematics
Object Number:
2002-534
Materials:
complete, plastic, wood
Measurements:
overall (estimate): 20 x 300 x 50 mm
type:
slide rule (electrical engineering)
credit:
Mrs Adrienne Finch
status:
Permanent collection

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