Portable potentiometer model 3155-DPW serial no. 68561 scale no.2235, by the Foster Instrument Co. Ltd., Letchworth, Herts, England, calibrated for e.m.f. (0-20 and 0-60mV), thermocouple temperature (various), resistance (0-60 and 0-600 ohms), and as a potential source. (Slightly damaged) Portable potentiometer model 3155-DPW serial no. 68561 scale no.2235 1960-1970
Early example of a Sigma mechanical comparator with workings visible. Made 1945-1955 Early example of a Sigma mechanical comparator circa 1940
Fixed focus radiation pyrometer, temperature indicator, by Foster Instrument Co. Ltd., Letchworth, England, 1950. Temperature range 700-1400°C, temperature indicator in mahogany case with glass display cover. Photo-Electric Radiation Pyrometer (Temperature Indicator), 1950 1950
Oral history recording; Expanding National Archive of Railway Oral History; Ken Bird; childhood; family life; sport; railway clubs; BRSA; pubs/drinking; work culture and relationships; conditions at work; depots; marshalling yards; changes in the railway industry; unions; signalman; British Rail; privatisation; ethnic minorities; 1950s; 1960s; 1970s; 1980s; 1990s; 2000s; Stratford; Cudworth; Barnsley; Crofton; Wakefield; York; Healey Mills; Southend; London; Tilbury; Teeside; Yarm; Liverpool Street; West Ham; Fenchurch Street Bird, Ken 2006-08-23
Sigma Instruments thickness gauge, 1951 stored in a box and fitted with a inspection fitting for measuring screw thread acceptibility. Purchased from Plessey Records in 1951. Sigma Instruments thickness gauge 1951
Sigma mechanical comparator fitted with a perspex cover to reveal workings and with the original instrument cover; complete with an inspection fitting on the instrument platform; dated 1940 to 1950. Sigma mechanical comparator 1940-1950
"Ectron" single pulse electroconvulsive therapy (ECT) machine, with bilateral headset (both sides wrapped with gauze) with long mains lead (plug cut off), made by Ectron Ltd., Baldock, Hertfordshire, 1950-51. Manufacturer's label on bottom calls it 'Electroconvulsant [sic] Apparatus'. Corrosion and leakage on bottom, so serial no. is no longer legible; 'D.2. B.H.M.C.' written in black marker on bottom. Compare 1980-1386. "Ectron" single pulse electroconvulsive therapy (ECT) machine 1950-1951