Playback & recording equipment
Birmingham Sound Reproducers Ltd DR33C portable disc cutting lathe: overhead view showing the feedscrew
5 nsa 1993
Birmingham Sound Reproducers Ltd
This overhead view shows the feedscrew which drives the cutter head across the surface of the record. It was possible to adjust various groove pitches. Before the development of tape recording, sounds could only be recorded by being cut into discs or cylinders (which were largely obsolete by 1930). The wax blanks were fragile and difficult to transport. In 1934, however, the Englishman Cecil Watts invented a new recording system which meant that robust metal discs could be used. Each disc had a thin ‘acetate’ coating of cellulose nitrate lacquer which was just sufficient to cut the recording. This allowed portable disc cutting lathes to be developed. This model is postwar. Dimensions: Width: 320 mm Height: 500 mm Depth: 400 mm deep.