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Expired
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Pierrie Moran Cox
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Individual
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Individual
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H04R1/1091—Details not provided for in groups H04R1/1008 - H04R1/1083
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Physics & Mathematics
(AREA)
Engineering & Computer Science
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Acoustics & Sound
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Signal Processing
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Telephone Set Structure
(AREA)
Abstract
26,474. Cox, P. M. Nov. 18. Tube expanders.-A device for expanding the casings of telephone receivers, that have shrunk sufficiently to make the cap loose, consists of a conical mandrel made of two similar threaded parts 1 which can be forced apart by a conical screw 7, so as to expand the telephone casing. The two parts of the device are held together by springs 4, mounted in recesses 3 and secured by cross-pins 6.
GB191226474D1912-11-181912-11-18Improvements in and relating to Spreaders for Telephone Receiver Casings.
ExpiredGB191226474A
(en)
A cylindrical or conical filter bag applicable to gas generators, which under the action of the gas to be filtered is forced to take a circular section (Machine-translation by Google Translate, not legally binding)