2 Telephone Demonstration Models, c. 1910

2 Physical Demonstration Models, c. 1910 1) Crookes' radiant matter tube, height 16 ½ in. – And: 2) Winkelmann-type vacuum double bulb, 1 glass tip broken, height 15 ¾ in. 2 physikalische Demonstr

2 Physical Demonstration Models with 9 Geissler Tubes, c. 1910 1) Stand with turning star and 3 tubes with uranium spirals. – And: 2) Isolated stand with 6 tubes of different shape and color, 2 of t

6 Physical Demonstration Models, c. 1910 1) 2 Leyden jars, height 15 and 20 ½ in. – 2) Discharger, with 2 ebonite handles and hinge. – And: 3) 3 conductors on glass pillars, one by Robert Droste

4 Physical Demonstration Models, c. 1910 1) Reflection and refraction apparatus by "Max Kohl, Chemnitz". – 2) Filament lamp on wooden stand. – 3) Voltmeter by "Radiguet à Paris", brass. – And:

3 American Steam-Engine Demonstration Models, c. 1910 1) Cast-iron model of a railroad locomotive engine, reversible, with Stephenson steering, hand-cranked, width 18 ¼ in. - 2) Steam motor, cas

Pair of Ericsson Intercom Telephones, c. 1910 2 model BC1300 units, serial nos. 1286995 and 1057805, for batteries, cradles with switches, single bells, handsets with speaking horns, on walnut boards.

2 Dynamo-Electric Machines, c. 1910 Physical demonstration models, 1 by Masquellier, Anvers, handcrank-driven, cast-iron wheels, on wooden boards, heights 12 ½ in. and 16 ½ in. 2 dynamoelektrische M

Ampère Table, c. 1910 Physical demonstration model, used for experiments on the relationship between magnetic fields and electric currents, originally with mercury filling, with 2 plaques: "Instrumen

4 Telephones 1) Ericsson table phone, model 381, original handset, demonstration model without tin cover, c. 1902. - 2) French candlestick telephone by A. Burgunder, with second earphone by Unis Fran

2 Ericsson Intercom Telephones, c. 1910 1) Intercom HA150, for ten lines, single bell, fixed cradle, press-switch handset with speaking horn. - And: 2) Model BC2050, single bell, nickeled-metal parts,

Bell Telephone Demonstration Model, c. 1900 Manufacturer: E. Leybold's Nachfolger, Coeln-Rhein. Open-works telephone model for demonstrating the mechanism, on mahogany base, very good original condit

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 Leybold armature models, 1 x double T armature and 1 x d

4 Demonstration Model Electric Motors, c. 1910 Various models and constructions, height up to 7 in., untested. 4 Demonstrationsmodelle Elektromotoren, um 1910 Unterschiedliche Bauformen und Konstru

2 Belgian Bell Telephones, c. 1910 Bell Telephone Manufacturing Company, Antwerp. A wall-mounted and a desk telephone, with metal cases and handsets with speaking horns. - Provenance: The telephones w

2 Electrostatic Induction Demonstration Models, c. 1900 Glass balls with hanging gold strips, conductors on the top, height 7 ½ and 9 7/8 in. 2 Demonstrationsmodelle "Influenz-Elektrizität", um 1900

2 Ericsson Intercom Telephones, c. 1910 1) Intercom HA150/20, for 20 lines, single bell, fixed cradle, press-switch handset with speaking horn. - And: 2) Intercom HA200/15, for 15 lines, single bell,

BECKER 2 pieces, drive model, c. 1910, carpenter at plane and saw, smith, 2 men at anvil, sheet metal, handpainted, restored, height: 11 and 14.5 cm German Description BECKER 2 Teile, Antriebsmodell,

Adix and Certa Adding Machines Pallweber & Bordt, Mannheim, Germany. 1) Adix model 2, c. 1910, attractive 3-digit adding machine with 9 keys, pre-clearing model, aluminum baseplate, in original velvet

2 Adix Adding Machines Pallweber & Bordt, Mannheim, Germany. 1) Adix model 2, c. 1910, attractive 3-digit adding machine with 9 keys and 10-addition bracket, pre-clearing model, aluminum baseplate, in

Large Electro-Magnetic Motor with Rotating Geissler Tube, c. 1910 Physical demonstration model, height 18 ¼ in., for tubes of up to 15 3/4 in. length, brass and steel, on walnut base, later tube, ve

Electric Motor with 10 Geissler Tubes, c. 1910 Physical demonstration model with rotating Geissler tubes, on brass pillar and walnut base, height 7 ½ in., with 10 tubes of various shapes and colors.

2 French Telephones 1) Telephone exchange, model 1910, with brass plaque "Propriété de l'État, Marche - 1919, Appareil Mobile pour Combine, Manufacture Natle Armes St. Etienne". No. 193

BING 2 pieces, drive models, sorting machine, sheet metal, c. 1910, surface area 16 x 7.5 cm, 1 water wheel with tower, used, the scratches on the paintwork are caused of old age German Description BI

2 Adix Adding Machines 1) Adix model 2, Pallweber & Bordt, Mannheim, Germany, c. 1910, attractive 3-digit adding machine with 9 keys and tens-addition bracket, pre-clearing model, aluminum baseplate,