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Expired
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GB1787217A
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Individual
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Individual
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Priority to GB1787217ApriorityCriticalpatent/GB166178A/en
Publication of GB166178ApublicationCriticalpatent/GB166178A/en
H04B3/60—Systems for communication between relatively movable stations, e.g. for communication with lift
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Engineering & Computer Science
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Computer Networks & Wireless Communication
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Signal Processing
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Electron Sources, Ion Sources
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Abstract
166,178. Berliner, I., Berliner, A., and Berliner, S. Dec. 3, 1917. Trolly pulleys and like collecting wheels.- Insulated train-wheels serving to collect current from track rails for telephonic communication are insulated from the axle 41 by a sleeve 44 en which is mounted a metal sleeve 46 on which the wheel 42 rotates, being held in position by a screw cap 51 lined with insulation 53. A metal cap 54 is screwed on the end of the axle 41.
GB1787217A1917-03-121917-12-03Improvements in telephonic apparatus
ExpiredGB166178A
(en)
Improvements to systems for automatically applying the wheel of the pole of a tramway, of an electric machine, on the conducting wire known as "trolley"
Improvements to systems for automatically applying the wheel of the pole of a tramway, of an electric machine, on the conducting wire known as "trolley"