Ruhmkorff Induction Coil, c. 1950

Laboratory Induction Coil, English, c.1950, with lable for Griffin & George, on plinth base with spark gap to front, width 32cm

English Laboratory Induction Coil, c. 1900 James Morris, Bolton. Coil length 12 in., length of the spark gap approx. 4 in., with Ruhmkorff's commutator, on polished mahogany base, size 21 x 11 in. - T

Large Induction Coil According to Ruhmkorff, c. 1910 Manufactured by AEG, Berlin. For spark length up to 10 in., overall size 34 x 10 5/8 x 18 ¼ in., good original condition. Großer Funkeninduktor n

French Experimental "Electricity" Kit, c. 1900 Coffret Electricité, consisting of 2 chromic acid elements, 2 vials for chromic acid, a Rühmkorff induction coil, an electric motor, 2 Geissler

Large 16-Inch Induction Coil According to Ruhmkorff, c. 1910 No. 997, manufacturer: "Watson & Sons (Electro-Medical) Ltd.", London, for spark lengths up to 16 in., overall size 34 x 13 1/3 x 18 ¼ in.

Large Induction Coil According to Ruhmkorff, c. 1910 Manufactured by Siemens & Halske. For spark length up to 6 in., with commutator, length of the coil 15 2/5 in., overall size 30 x 10 5/8 x 16 ½ in

Large Induction Coil According to Ruhmkorff, c. 1900 No. 7934, manufactured by Fr. Klingelfuss & Co., Basel. Coil length 16 ½ in., Ø 8 ¾ in., on walnut base. Großer Funkeninduktor nach Ruhmkorff,

Large "Nivoc" Laboratory Induction Coil, c. 1930 W. and J. George and Becker Limited, Birmingham and London. Coil length 13 in., length of the spark gap approx. 5 in., with Ruhmkorff's commutator, on

A Large Induction Coil, English, c.1890, with plaque for 'F. E. BECKER & CO 33-37 HATTON WALL LONDON', on a large French polished mahogany plinth base with Ruhmkorff switch large adjustable interrupte

Very Large Induction Coil by Max Kohl, c. 1915 Max Kohl, Chemnitz, Germany. Coil length 12 ¼ in., length of the spark gap approx. 6 in., with mercury and platinum interrupters and Ruhmkorff's commuta

A Very Large Induction Coil, English, c.1900, unsigned the secondary coil with vulcanite separator and supported on wooden uprights, on large French polished mahogany base with brass lacquered termina

An Unusual Induction Coil, English, c.1900, engraved on the coil, 'P HARRIS & Co. Ld. BIRMINGHAM', the coil mounted on a French polished mahogany plinth base with all lacquered brass fittings and term

Large Induction Coil with Mercury Interrupter, c. 1910 Coil length 19 5/8 in., spark length up to 9 7/8 in., on wood base, size 32 1/3 x 14 1/5 in. An impressive exhibition item! Großer Funkenindukto

'Large Induction Coil by Siemens & Halske, c. 1910 For "Gesellschaft für drahtlose Telegraphie", type RF ms2, 17 ¾ x 9 7/8 x 11 2/5 in. 'Großer Funkeninduktor von Siemens & Halske, um 1910 Für "Ge

United States,Circa 1950 Turkey feather patterned coil basket comprised of yellow, deep brown, and light brown pigments. Approx. 16" dia..,Plant fiber From the collection of a Cumberland, Rhode Island

Wall Telephone by L.M. Ericsson, c. 1910 Stockholm, 3-part induction coil, double bell, lightning protection, walnut case, writing desk, tin battery cover. Wandtelephon von L.M. Ericsson, um 1910 Stoc

Slaby-Arco System Radiotelegraph Transmitter, c. 1900 AEG, Berlin. No. 30, consisting of 2 Leyden bottles, setting coil, induction coil and Morse key, on walnut base with surface capacitor in the lowe

Norwegian Wall-Mount Switchboard, c. 1890 By Wingers Elektriske Værksted. Walnut case, 15 lines, 3-part induction coil, 6 plugs with weights (wiring renewed), handset with speaking horn, lightnin

French Experiment Box for Demonstrating Electricity, c. 1910 Electricité, with 2 chromic acid cell batteries, induction coil, 2 Geissler tubes, magneto-electro motor with mount for tubes, 2 lamps

Telephone Switchboard, c. 1910 With plugs and flaps, five-part induction coil, crank, handset with speaking horn, and mahogany case, height 22 ½ in. Telephonzentrale, um 1910 Mit Stöpseln und Kl

Early Wall Telephone by L.M. Ericsson, c. 1890 Stockholm, model 325, fixed carbon microphone, Bell-type handset, 3-part induction coil, double bell, lightning protection, ornate walnut case, writing d

Early Wall Telephone by L.M. Ericsson, c. 1890 Stockholm, model 301 (new no. AB 210), fixed carbon microphone no. 570 on arm, Bell-type handset, 3-part induction coil, double bell, lightning protectio

12 Precision Measuring Instruments, c. 1870-1900 1) Kohlrausch's universal bridge, no. 1822, Hartmann & Braun, with comparative resistors from 0.1 to 1000 ohms, induction coil and slide resistor, on m

Wall Telephones and Telephone Parts, c. 1900 1) Wall telephone by J. Berliner, Hanover, no. 23, with induction coil, no earphone. - 2) Belgian wall telephone, handset with horn, marked "Compagnie des