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Early Door Alarm System with Glass Battery, c. 1920 Germany, "Fricke Alarm-Apparat", unused in sales
Early Door Alarm System with Glass Battery, c. 1920 Germany, "Fricke Alarm-Apparat", unused in sales box with instructions, ingeniously constructe...
Electromagnetic Motor, c. 1880 Scientific brass electric motor, on mahogany board, wheel: Ø 4 in.,
Electromagnetic Motor, c. 1880 Scientific brass electric motor, on mahogany board, wheel: Ø 4 in., height 7 ½ in. Condition: (3+/-) Elektromagnet...
High-Tension Transformer, c. 1910 By Max Kohl, Chemnitz. Physical demonstration model according to
High-Tension Transformer, c. 1910 By Max Kohl, Chemnitz. Physical demonstration model according to Elster & Geitel, on walnut board, with 2 indepe...
2 Interesting Electric Motors, c. 1910 1) GBN (Gebrüder Bing, Nuremberg), triple armature, painted
2 Interesting Electric Motors, c. 1910 1) GBN (Gebrüder Bing, Nuremberg), triple armature, painted cast metal housing, height with wooden base 6 ¼...
Magneto-Electric Shock Generator, c. 1880 Used to generate electric shocks for medical purposes;
Magneto-Electric Shock Generator, c. 1880 Used to generate electric shocks for medical purposes; brass, horseshoe magnet, 2 coils, handcrank, bone...
Spark Gap Induction Coil With polarity reverser, coil length 7 in., GV, 3A, on mahogany base, 12 ½ x
Spark Gap Induction Coil With polarity reverser, coil length 7 in., GV, 3A, on mahogany base, 12 ½ x 9 in., working. Condition: (2-3/2) Induktion...
3 Special Bulbs in Triple Mount, c. 1920 Ceramic mount, 1 black light bulb and 2 bulbs with double
3 Special Bulbs in Triple Mount, c. 1920 Ceramic mount, 1 black light bulb and 2 bulbs with double filaments (Philips and Tungsram), 220 V. - In a...
Froment's Electric Motor Physical working model, heavy type, size 8 ¼ x 7 x 9 ½ in., a precise
Froment's Electric Motor Physical working model, heavy type, size 8 ¼ x 7 x 9 ½ in., a precise copy of the 1910 Max Kohl demonstration model. Cond...
2 Small Electric Motors Each motor with finely japanned cast metal, triple armature, on wooden base,
2 Small Electric Motors Each motor with finely japanned cast metal, triple armature, on wooden base, 4 x 4 in. and 3 ½ x 3 ½ in., good condition. ...
Very Rare Nernst Lamp Developed by Walther Nernst in 1897, German competing product to Edison's
Very Rare Nernst Lamp Developed by Walther Nernst in 1897, German competing product to Edison's carbon arc lamp with better energy efficiency. 2 1...
29 Early Carbon Filament Bulbs, 1900 onwards 3 reflector lamps, marked "Lux", France, E27 base, 1
29 Early Carbon Filament Bulbs, 1900 onwards 3 reflector lamps, marked "Lux", France, E27 base, 1 lamp with lateral fixed filaments, E27 base, 4 l...
Electric Motor with Chromic Acid Cell by Ernst Plank, c. 1900 Rare German teaching toy, size 11 x
Electric Motor with Chromic Acid Cell by Ernst Plank, c. 1900 Rare German teaching toy, size 11 x 5 x 8 ¼ in., good complete original condition. C...
Electric Motor and 2 Armature Models, c. 1910 1) DC motor, open construction, cast-metal housing,
Electric Motor and 2 Armature Models, c. 1910 1) DC motor, open construction, cast-metal housing, 3 belt drives, height 4 ¾ in. - And: 2) 2 Leybol...
Electromagnetic Rotating Motor, c. 1860 Probably France, Ø 4 1/3 in. flywheel, mahogany base 9 x 5
Electromagnetic Rotating Motor, c. 1860 Probably France, Ø 4 1/3 in. flywheel, mahogany base 9 x 5 in., rare. Condition: (3+/-) Elektromagnetisch...
2 Current Generating Dynamos, c. 1915 For physical experiments. 1) Manufactured by Gustav Begin,
2 Current Generating Dynamos, c. 1915 For physical experiments. 1) Manufactured by Gustav Begin, Bruxelles. Overall size 15 3/4 x 7 x 13 3/4 in. -...
Small Experimental Motor, c. 1910 AC motor, on wooden board, overall size 8 ¼ x 4 x 5 in. Condition:
Small Experimental Motor, c. 1910 AC motor, on wooden board, overall size 8 ¼ x 4 x 5 in. Condition: (3-/-) Kleiner Versuchsmotor, um 1910 Wechse...
2 Electromagnets according to Weinhold, c. 1920 Physical demonstration models, 4 1/3 and 7 4/5 in.
2 Electromagnets according to Weinhold, c. 1920 Physical demonstration models, 4 1/3 and 7 4/5 in. limb length, 2 and 4 ½ in. Ø, on wooden bases. ...
Small Electromagnetic Motor, c. 1900 For physical demonstrations, on wooden base, 5 x 4 in. Condition: (3-/-) Kleiner elektromagnetischer Motor, ...
Large Dynamo-Electric Demonstration Machine, c. 1920 With maker's plaque: "Pleskot & Spol, Presna
Large Dynamo-Electric Demonstration Machine, c. 1920 With maker's plaque: "Pleskot & Spol, Presna Mechanika, Praha". Handcrank-driven, large chain...
Early Electric Motor According to Moritz von Jacobi, c. 1850 Cast iron, 2 switches with springs,
Early Electric Motor According to Moritz von Jacobi, c. 1850 Cast iron, 2 switches with springs, diameter of the wheel 5 ¼ in., ground size 9 x 7 ...
2 Dynamo-Electric Machines, c. 1910 Physical demonstration models, 1 by Masquellier, Anvers,
2 Dynamo-Electric Machines, c. 1910 Physical demonstration models, 1 by Masquellier, Anvers, handcrank-driven, cast-iron wheels, on wooden boards,...
Electric Motor with Rotating Geissler Tube, c. 1880 Physical demonstration model, height 7 4/5
Electric Motor with Rotating Geissler Tube, c. 1880 Physical demonstration model, height 7 4/5 in., tube length 6 ¼ in. Condition: (3+/-) Elektro...
2 Early Electric Motors, c. 1910 Unmarked, large coils, belt pulleys, on wooden bases, heights 9 ½
2 Early Electric Motors, c. 1910 Unmarked, large coils, belt pulleys, on wooden bases, heights 9 ½ in. and 7 in. Condition: (3+/-) 2 frühe Elektr...
Large Early Electric Motor, c. 1890 Unmarked, open construction, height 13 1/3 in., untested, good
Large Early Electric Motor, c. 1890 Unmarked, open construction, height 13 1/3 in., untested, good condition. Condition: (3+/-) Großer früher Ele...
Early Electric Motor, c. 1900 Probably experimental model, open construction, ring armature, with
Early Electric Motor, c. 1900 Probably experimental model, open construction, ring armature, with belt drive, height 12 ¼ in. Condition: (3/-) Fr...
Electromagnetic Motor with Geissler Tube, c. 1900 Physical demonstration model, for tubes up to 6
Electromagnetic Motor with Geissler Tube, c. 1900 Physical demonstration model, for tubes up to 6 in., overall height 8 in. Condition: (2-3/-) El...
Electric Experimental Motor with Rotating Mirror, c. 1900 Driven by a synchronous AC motor, brass
Electric Experimental Motor with Rotating Mirror, c. 1900 Driven by a synchronous AC motor, brass columns, polished walnut base, series resistance...
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