Oval dynamometer with central scale with indicator
1840-1880
Dynamometer, spring-type rack index
Siemens electro-dynamometer, c.1882
1882
Siemen's Electro-dynamometer
Two hand dynamometers mounted on board
Dynamometer, Chicago, United States, 1945-1955
1945-1955
Siemens dynamometer
1900
Dynamometer, France, 1890-1910
1890-1910
Sumpner's patent electro-dynamometer, no.37
1910-1919
Finger dynamometer by C.F. Palmer Ltd.
Siemens Brothers Dynamometer
circa 1898
Large standard electrodynamometer
1888
Model of Ayrton and Perry's dynamometer coupling.
circa 1890
Energograph' dynamometer marked 'DRP'
1920-1950
Draught recording dynamometer by Richard Clyburns
Finger dynamometer by C.F. Palmer Ltd.
Original Froude screw dynamometer
Draught dynamometer by Cottam and Hallen, with case
Aviation dynamometer, imput 28V DC output 230V DC
1940-1960
Dynamometer, made by Elliott
Dynamometer Instruments, Great Western Railway
Froude hydraulic dynamometer, type D.P.X.O.
1968
Draught recording dynamometer and case
Dynamometer type 3206 serial no.164233 by H. Tinsley and Co. Ltd.
1965