Cambridge and Paul Dynamometer Wattmeter

Pattern LD

S/N l11021

Cambridge and Paul Instrument Company label in the lid

I was given this instrument which formed part of a collection of many instruments collected by Bob Evans by his daughter Alice Kirby. It is housed in a mahogany box the lid of which, when closed ensures that the meter movement is clamped. The leather carrying strap is missing. The instrument has never been opened and is in working order, though I have not checked the calibration.  From the label in the lid and the wording on the scale plate, I guess this dates from around 1923/4. In December 1919 the company took over the R. W. Paul Instrument Company of Muswell Hill London and the name changed to The Cambridge and Paul Instrument Company Ltd. The name was shortened to the Cambridge Instrument Co Ltd in 1924.