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Expired
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Stephen Arthur Sisson
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Individual
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Individual
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Conveying And Assembling Of Building Elements In Situ
(AREA)
Tents Or Canopies
(AREA)
Abstract
5360. Sisson, S. A. March 10. Billiards.-A device for suspending chalk consists of a casing a provided with lugs a<1> by which it may be secured to the ceiling, and with a hole a<3> for the string g to which the chalk is attached. The string is wound on a spring barrel b working loosely on a sleeve c carried by a shaft d, which passes through the casing and is secured by a nut. The spring f has one end fixed to the sleeve c and the other end fixed to the barrel.