Page 20 - RD_2015_12

of projecting pins, set to the same gauge, and and G, small loops will be observed. These
before the punch descends these guide pins are provided for the purpose of obviating
engage with the four preceding pairs of holes, any pull upon the film while in the guide
so that the distance between the sets of four gate, and beneath the punches, which might
holes on either side is bound to be exactly the otherwise destroy the alignment and accura-
same as between any two consecutive holes cy of the gauge. These loops remain con-
made simultaneously. The result is that the stant, but they can be altered at will while
holes are perforated with absolute mathe- the machine is running without disturbing
matical accuracy. the actual perforation. The Williamson per-
forator can be run under power at a relative-
As the film emerges from the perforator ly high speed, the wheel K being capable of
proper, it is passed between two guide roll- 400 revolutions per minute without impair-
ers and a toothed sprocket G, which meshes ing the accuracy of the work in the slightest
with the perforations, and thence the lower degree.
film passes to the re-winding spool H, and
the upper film to the spool J. Between the Thanks to Alan Vogt for the loan of the book
perforating plate and the respective rollers C referred to.

FOR SALE - CINEMA CARBONS

A large quantity of carbons unearthed in Tasmania; includes boxes of
Marble 8 mm x 12 inch AC copper coated carbons (250 per box), other
copper coated AC carbons of various brands and some black carbons.
Offers:- we don’t want big dollars!

WANTED

A 35 mm Greater Union opening title (blue & gold) as used in the late
1950s or early 60s, in good condition.

A front of case plate and lens jacket to suit a C & W model E head,
either original pattern or later CinemaScope adaption.

Please contact Phil Corby (03) 63725158
or philcorby@dodo.com.au

20 REEL DEALS December 2017