A superb early experimental Induction Coil made by C.F.Palmer 403 Brixton Road London S.W.9 Circa 1910
This beautifully built instrument is listed in the manufacturer's catalogue as Model H30 and is described as follows:-
INDUCTION COIL WITH INTERRUPTER
"The above represents a well designed high class coil suitable for experimental or class work. It is of the well known sledge type after the model of Prof. du Bois-Reymond with Helmholtz modification of the Neef hammer. The base is graduated in mm to 500 and folds under to economise space. The primary consists of approximately 300 turns of silk covered wire wound on a core of specially annealed iron wire. For the secondary of 7500 turns, a high grade enamelled wire which, in combination with the system of winding has been found to give good results for a general purpose coil. There are a full set of terminals so all the experiments mentioned in the text books can be carried out."
This information, and more, can be seen at www.radiomuseum.org.
This original description, together with the high definition images should provide all the information you need but I can confirm that the coil is in working order. The primary, secondary and interrupter coils are all intact and undamaged. There are 2 missing brass terminal tops but otherwise everything appears to be present, correct and totally original.
The mahogany base measures 360mm by 100mm extending to 718mm and the overall height is 134mm. It weighs 1.76kgs.
Please view and super-size all the images as they form an essential part of the description.
Thanks for looking and please let me know if you need any further pictures, details or overseas shipping costs.
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