ASTRONOMICAL DEMONSTRATION, CELESTIAL MODEL,

Collection of Physical Demonstration Models and Technical Devices 1) Carbon arc lamp, demonstration model by John Browning, London, original lacquered brass, 2 graphite electrodes, one height-adjustab

4 Spoked-Wheel Calculating Machines and a Demonstration Model 1) Rema I, 1914 onwards, Braunschweiger Rechen­maschinenfabrik Rema GmbH, serial no. 4340, with 9, 8 and 13 digits, with wood base an

Tesla Coil Demonstration Model, c. 1915 With label: "Elektro Vulkan, Kromeriz", circular wood base, inner coil on porcelain isolator, outer coil on 3 glass columns, height 15 ¾ in., Ø 10 1/5 in.,

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

Electrophysical Demonstration Model, c. 1890 France, marked "HRFA", mahogany, thick-walled glass container (fixed to the base), 6 electric connections, 2 coils, 2 electrodes inside of the glass, one s

Demonstration Model of the Single-Cylinder Steam Engine "Lady Margaret" Hand-cranked museum model, polished steel, brass and cast metal, mahogany-lagged cylinder Ø 3 1/5 in., crosshead guide in l

Demonstration Model of an Early Electric Motor, 1890 To demonstrate the windings of an armature, on turned wood base, height 15 in. Demonstrationsmodell eines frühen Elektromotors, 1890 Zur Darst

Zoetrope (Demonstration Model) Home-built large demonstration zoetrope, wooden base, drum Ø 11 ¾ in., crank drive, with 5 strips. Zoetrope (Demonstrations-Modell) Großes Demonstrations-Zoetrope aus

6 Typewriters Keyboard Demonstration Models 1) Torpedo, wall-mounted model, with indication of the angle degree in 4 steps. - 2) 3 x Adler, table models, with key, lever and platen, 2 different models

Countertop teaching tool. Works all the way. Made by Hohm. Measures 15" tall.

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

English Telegraph Demonstration Model, 1902 Dated 1902; consisting of key, relay and sounder; on mahogany stained base, size 13 x 7 in. An excellent exhibition item. Englisches Telegraphen-Demonstrati

6 Typewriter Keyboard Demonstration Models Official factory models. 1) Mercedes, table model, with key and lever. - 2) Erika, Seidel & Naumann, table model, with key and lever. - 3) Triumph, table mod

A Painted Metal Piston Generator Demonstration Model Second Half 20th Century Property from a Midwest Collector

Demonstration Model of an Early Carbon Grain Microphone, c. 1900 With series resistor and switch, wood base stamped with no. 188937. Demonstrationsmodell eines frühen Kohle-körnermikrophons,

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

4 Typewriter Keyboard Demonstration Models 1) Torpedo 6, table model, type-lever mechanism, with four angle indicators, back with description, official factory model. - 2) Wall model "Wagenaufzug" to

5 Typewriter Demonstration Models 1) Olympia, electric, partial cutaway model, with motor, carriage and parts of the mechanism. - 2) Adler, working model with 5 keys, tabulator and keys for the carria

Demonstration Model AEG Hand Drill, c. 1950 Model UHB10, transparent plastic body, bakelite, in oak case, pressure switch on the front (defective), 23 3/5 x 13 ¾ in. Demonstrationsmodell AEG-Ha

Static Charge Demonstration Model Nickeled brass tube on isolating glass rod, with 6 elder-marrow balls on strings, height 14 ½ in. Modell zur Demonstration statischer Ladungen Vernickelte Messingrö

Continental Typewriter Demonstration Model, c. 1935 Official model of Wanderer-Werke, Siegmar-Schönau, no. P072545, for demonstrating all functions of a typewriter, carriage movement defective, o

A Hills McAnna Oiler Demonstration Model Late 19th/Early 20th Century raised on a wood base. Height overall 20 1/2 x width 16 1/2 inches.  Property from a Midwest Collector

Group of Physical Demonstration Models, c. 1900 1) Wimshurst's influence machine, Trüb, Fierz & Cie., Zurich, height 14 ½ in., complete, rubber straps need to be renewed. - 2) 8 chromic acid

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