The engineer's sketch-book of mechanical movements, devices, appliances, contrivances and details employed in the design and construction of machinery for every purpose

by Thomas Walter Barber

[2145]. Expanding legs for telescope or camera tripod.

[2146]. Expanding tripod, formed to close up into a cylindrical group.

[2147]. Expanding table of three or more slides.

[2148]. Expanding tripod. The legs are hinged to a triangular prism, and form a cylindrical group when closed.

[2149]. Expanding reamer. The body is split up in three parts as far as the end of the bolt.

[2150]. Addy’s expanding collar consists of two rings with the adjacent faces spiral, so that by revolving them they separate to the extent of the pitch. The collar therefore expands longitudinally, not diametrically.

[2151]. Expanding split reamer or mandrel with taper screw.

[2152]. Expanding riddle or screen, to vary the spaces between the bars.

[Larger plate.]