Alfred Graham and Co
of St. Andrew's Works, Crofton Park, London, SE4
Manufacturers of ship telephones; later producers of Amplion
Late 1880s: established as partnership between Alfred Graham, Edward Graham and (Joseph) Arthur Dearlove[1].
1894 Company established.
1894 "Mr Alfred Graham's" ingenious loudspeaking telephone was used in scientific research on acoustics[2].
1911 New factory set up at Brackley[3].
1914 Electrical engineers and contractors. Specialities: loud speaking telephones, exchange switchboards and other apparatus for communication on board war and mercantile vessels, for use in power stations, mines, collieries etc. Employees 300. [4]
1919 "No less than 12000 ship installations" of Graham's telephones had been made[5].
1920 New company established Graham Amplion Ltd to manufacture and market Amplion loudspeakers[6].
1922 Listed Exhibitor - British Industries Fair. Manufacturers of Gramophones of quality and distinction (Algraphones); Spring Motors; "Sonat" Sound Boxes; Record Filing System; also Gramophone Components and Accessories. (Stand No. B.27) [7]
1925 Advert for Amplion public address system manufactured by Alfred Graham and Co[8].
1929 Ground-air wireless demonstrated for instructional purposes[9].
1937 Advert for Triton telephones and Graham patent indicator for rudders[10].
1938 Altered memorandum of association to include pension[11].
1952 Subsidiary of Siemens Bros - designed starter relays for Xenon lamps for HMS Eagle[12].
1954 Listed as one of the principal subsidiaries of Siemens Bros as manufacturers of miscellaneous electrical equipment, on the take-over by AEI[13].