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Group of Electrotechnical Measuring Instruments1) Vaometer, Type R, Transforma, D.R.G.M. - 2) 3
Group of Electrotechnical Measuring Instruments1) Vaometer, Type R, Transforma, D.R.G.M. - 2) 3 wattmeters, with bulb sockets. - 3) Wattmeter, wit...
Lord Kelvin's Patent Multicellular Voltmeter, c. 1895No. 753, manufacturer: James White, Glasgow,
Lord Kelvin's Patent Multicellular Voltmeter, c. 1895No. 753, manufacturer: James White, Glasgow, patented 1888, original lacquered brass, leveled...
Foucault Interrupter Demonstration Model, c. 1890Manufacturer: A. Gaiffe, Paris. High-voltage
Foucault Interrupter Demonstration Model, c. 1890Manufacturer: A. Gaiffe, Paris. High-voltage interrupter for induction coils, electromagnetic dri...
Current-Generating Dynamo, c. 1900Hand-cranked, for generating 1,5 V AC, flywheel Ø 8 ¾ in.,
Current-Generating Dynamo, c. 1900Hand-cranked, for generating 1,5 V AC, flywheel Ø 8 ¾ in., mahogany base 11 2/5 x 6 ¾ in., working.Zustand: (2-3...
Demonstration Model of the Tesla Generator, c. 19306 ¾ in. primary coil, 1 ½ in. secondary coil,
Demonstration Model of the Tesla Generator, c. 19306 ¾ in. primary coil, 1 ½ in. secondary coil, glass pillar 19 in. high, wood base 16 1/6 x 9 ½ ...
Early DC Electric Motor, c. 1900Heavy cast-iron frame, height 15 in.Zustand: (3+/-)Früher Gleichstrom-Elektromotor, um 1900Schweres Modell aus Guß...
Ampere and Voltmeter, Galvanometer and Resistance Bridge, c. 1910 onwards1) Ampèremètre, Société
Ampere and Voltmeter, Galvanometer and Resistance Bridge, c. 1910 onwards1) Ampèremètre, Société Gramme, brass, Ø 6 in. - 2) Voltmeter, Hartmann &...
Measuring Bridge by Hartmann & Braun, c. 1900Germany, no. 6326, with 2 marble spindles, galvanometer
Measuring Bridge by Hartmann & Braun, c. 1900Germany, no. 6326, with 2 marble spindles, galvanometer and 3 rotating switches, in wood carrying cas...
Spark Coil with Vacuum Scale, c. 1920Ruhmkorff coil, length 7 ¼ in., with 5 vacuum tubes after
Spark Coil with Vacuum Scale, c. 1920Ruhmkorff coil, length 7 ¼ in., with 5 vacuum tubes after design by Cross (0,01, 0,1, 0,3, 4, 30), overall he...
3 Teaching Precision Volt- and Ampermeters, c. 1920Large demonstration models in wood cases. 1)
3 Teaching Precision Volt- and Ampermeters, c. 1920Large demonstration models in wood cases. 1) Max Kohl, Chemnitz. Height 13 1/3 in. - 2) Griffin...
2 Siemens & Halske Precision Measuring Instruments1) Universal measuring instrument, for telegraph
2 Siemens & Halske Precision Measuring Instruments1) Universal measuring instrument, for telegraph and telephone line measurements, with crank and...
Induction Coil after Ruhmkorff, c. 1910For sparks up to 2 in., polarity changer, 6 V, 3 A, coil
Induction Coil after Ruhmkorff, c. 1910For sparks up to 2 in., polarity changer, 6 V, 3 A, coil length 7 in., walnut base.Zustand: (2-3/2)Funkenin...
2 Early Electric Motors, c. 19001) Electromagnetic motor according to Froment, 2 electric magnets,
2 Early Electric Motors, c. 19001) Electromagnetic motor according to Froment, 2 electric magnets, on mahogany base, 8 4/5 x 5 ¼ in. - And: 2) AC ...
Sullivan Universal Galvanometer, c. 1920Moveable coil mirror galvanometer, manufacturer: H.W.
Sullivan Universal Galvanometer, c. 1920Moveable coil mirror galvanometer, manufacturer: H.W. Sullivan Ltd., Led Street, Peckham, no. 1173, brass ...
Resistance Bridges and Wattmeter, c. 19101) Resistance bridge with rheostat by "Hartmann & Braun",
Resistance Bridges and Wattmeter, c. 19101) Resistance bridge with rheostat by "Hartmann & Braun", no. 667, with earphone. - 2) Precision wattmete...
Group of Antique Switches and Power Sockets, 1900 onwardsPorcelain, ceramic, bakelite, brass and
Group of Antique Switches and Power Sockets, 1900 onwardsPorcelain, ceramic, bakelite, brass and other materials, predominantly up to 250 volts. 5...
Ediswan-Focus Prototype Projection Light Bulb, c. 1884Hand-blown glass, etched "80 XR 50 48B" and "
Ediswan-Focus Prototype Projection Light Bulb, c. 1884Hand-blown glass, etched "80 XR 50 48B" and "Ediswan-Focus", Ø 3 1/6 in., coiled carbon fila...
Bulb Manufacturing ShowcaseFrom the empty glass housing to the finished light bulb, 11 parts, with
Bulb Manufacturing ShowcaseFrom the empty glass housing to the finished light bulb, 11 parts, with inscriptions, size 17 1/3 x 9 ¾ x 4 ¼ in.Zustan...
Display Cabinet: "The Manufacturing of Philips Light Bulbs", c. 1930Showing chemical components
Display Cabinet: "The Manufacturing of Philips Light Bulbs", c. 1930Showing chemical components and various construction phases of the glass body,...
Large Early Electric Light Bulb AssortmentMostly early 20th century, various filaments and constructions, examples by Philips, Pope, Osram and oth...
19 Alpha-Numerical LightbulbsEarly 20th century lamp assortment, mostly 210-240 V, tipped glass,
19 Alpha-Numerical LightbulbsEarly 20th century lamp assortment, mostly 210-240 V, tipped glass, spring-base Edison-type sockets, manufactured by ...
3 High-Power Light Bulbs, c. 1920Gas-filled tungsten lamps, 220 V, Edison E40 bases, brass sockets. 1) Osram Nitra, 3.000 W, length 20 in. - 2) Ma...
Astatic Galvanometer by Hirschmann, c. 1885Engraved on brass plate: "Absolutes Galvanometer - W.A.
Astatic Galvanometer by Hirschmann, c. 1885Engraved on brass plate: "Absolutes Galvanometer - W.A. Hirschmann, Berlin, No. 127", brass, oak case, ...
2 Compensation Devices, c. 19301) Variable manganin tension divider according to Raps, manufactured by Siemens & Halske, 5 decades, with lid. - An...
3 Precision Galvanometers, 1900-19301) Mirror galvanometer by Felten & Guilleaume, Carlswerk,
3 Precision Galvanometers, 1900-19301) Mirror galvanometer by Felten & Guilleaume, Carlswerk, Cologne. Length 19 5/8 in. - 2) Tangent galvanometer...
Gas or Steam Engine Dynamo, c. 1910Unmarked, belt-driven, approx. 20 V power.Zustand: (3+/-)
Gas or Steam Engine Dynamo, c. 1910Unmarked, belt-driven, approx. 20 V power.Zustand: (3+/-)Dynamomaschine für Gas- oder Dampf maschinen, um 1910U...
Large Ruhmkorff Induction CoilManufactured by "E. Leybold's Nachfahren, Cöln", distributed by "
Large Ruhmkorff Induction CoilManufactured by "E. Leybold's Nachfahren, Cöln", distributed by "Kipp & Zonen", Netherlands, for spark gaps up to 6 ...
2 Hartmann & Braun Precision Amperemeters1) Astatic electro-dynamic measuring unit, serial no. 62!
2 Hartmann & Braun Precision Amperemeters1) Astatic electro-dynamic measuring unit, serial no. 62! For 0-25 amperes, integrated bubble level, tiny...
2 Large French Brass Measuring Instruments1) Voltmeter by Chauvin & Arnoux, Paris, Système calorique
2 Large French Brass Measuring Instruments1) Voltmeter by Chauvin & Arnoux, Paris, Système calorique à compensation, small crack in mount, Ø 10 1/...
Large Induction Coil According to Ruhmkorff, c. 1910Manufacturer: "AEG, Berlin", for spark length up
Large Induction Coil According to Ruhmkorff, c. 1910Manufacturer: "AEG, Berlin", for spark length up to 10 in., overall size 34 x 10 5/8 x 18 ¼ in...
Siemens & Halske Universal Galvanometer, c. 1898Large German precision instrument, serial no. 64483,
Siemens & Halske Universal Galvanometer, c. 1898Large German precision instrument, serial no. 64483, original lacquered brass, graduated slate pla...
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