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ammeter, prototype - 1884 15-40amps

Siemen's wattmeter No 1410 in case

Walker photographic recorder

One of Wheatstone's electromagnetic engines, 1841

1841

Motor starting switch resistances in sand box

Kodak Kodascope 8 Model 30 projector. For 8mm film 200 feet reels, claw intermittent, 2 sprockets. Motor speed control, lamp switch, for 110 or 240 volts.

Kodak Kodascope 8 Model 30 projector. For 8mm film 200 feet reels

circa 1948
Pathescope 17.5mm Home Talkie Sound projector. Sound projector for 17.5mm film. Film transport: single continuous sprocket, claw intermittent. 16v 8a lamp, bayonet cap with 3 locating pins. Projection lamp illuminated soundtrack bias slit, lens and mirror system. Volume controlled by rotating shutter over photocell. 3 valve amplifier (R2, & A2, 9A1). Pick up or microphone socket. 8 inch speaker in separate case. 11 inch reel capacity. 8v 16v and 17v tappings for lamp brightness. Manufactured by Pathescope Ltd., London. 1934. Serial No reads in part ...582.

Pathescope 17.5mm Home Talkie Projector

1934