carry rollers which are the Fig. 1 shows part of a blind and window-sill, with ground glass in order to avoid confusion. The ground portions of the chains which enter the grooves formed the fastener in locking position. Fig. 2 is an inverted by the threads of the worms. The chains are firmly bottom… … be adjustable so as to regulate the strain upon the twochains. Forthis purpose the inventor PHOTOGRAPHY IN COLORS. has provided segmental slots in one of the disks, which disk is not rigidly secured to the PETTINGILL’S SHUTTER-FASTENER. drum-shaft, but.is held in place by bolts passing Then the…
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