Dubilier capacitance electrical engineer's slide rule
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
- Measurements:
-
overall (estimate): 20 x 300 x 50 mm
- credit:
- Mrs Adrienne Finch
