Boxoffice-January.03.1953

KEEP YOU SI
PROJECTORS IN
TOP OPERATING
CONDITION
WITH S^ PARTS
Good booth equipment is the most vital
item of theatre operation — and by far
the least costly.
Replace worn parts promptly.
Catalog on request
LAVEZZI MACHINE WORKS
4635 West Lake Street
Advanced
—
Chicago 44, Illinois
DESIGN in
Griggs
Chairs
Solid steel cen*
ter
give
standards
strength
and durability.
PROJECTION AND SOUND
Tips on Trouble-Shooting
For Men in the Booth
by WESLEY TROUT
Starting this
MONTH, we will present
servicing data on
both projection and
sound each month.
We have received
many requests from
our readers, saying
they would like to
read about both subjects
in each issue of
Modern Theatre. We
Wesley Trout think it is a good idea,
too, so here goes!
Let us start with the mechanism first.
Keeping the projector mechanism olean Ls
one of the best ways of assuring highest
quality projection from any make of projector.
The interior of the film compartment
of most all modern mechanisms is
large and roomy; ample space is generally
provided between all units to facilitate
rapid and thorough cleaning of all parts.
The interior of all film compartments is
now painted a light color which aids in observing
dirt and other foreign matter,
thereby making it very easy for the projectionist
to keep clean.
DAILY CLEANING BEFORE SHOW
We cannot too strongly point out that
every projectionist should cultivate the
habit of cleaning all parts of the mechanism
every day before the show starts. A
soft, clean rag and a small stiff-hair brush
is all that is required to do a first-class
cleaning job on any projector mechanism.
The sprockets in the projector mechanism
and sound head should be brushed around
their entire periphery to remove all deposits
of dirt and film emulsion: the pad
rollers should also be brushed and then
wiped with a clean rag; the film strippers
should be checked and all the dirt and
emulsion deposits removed. Dirty sprockets
will cause trouble. Dirty intermittent
sprocket will cause picture jump, and dirt
on takeup sprockets will cause loss of loop.
Dirty sound sprockets will cause poor quality
of sound reproduction. Use a stiffbristle
tooth brush for cleaning sprockets.
WATCH THE FILM TRAP
Another very important unit in the film
compartment of any make of projector is
the film trap and gate assembly. Keep
them clean! The film gate should be removed
daily and very thoroughly cleaned
with a clean rag. Next, the film shoes and
guides on the aperture plate should be
thoroughly cleaned daily, making very sure
that all deposits of dirt and film emulsion
are removed. It is of utmost importance
care should be taken when cleaning between
the film guide rollers and the film
trap main casting to remove all dirt and
foreign matter which may prevent their
turning freely. Remember that failure of
inner roller to turn when film is passing
through the film trap may result in it becoming
cut by the edges of the film. Once
a groove is cut in these rollers, it will be
nsures years of hard
wear in a chair with
comfort and beauty.
WRITE FOR CATALOG
GRIGGS EQUIPIVIE^T CO.
Belton, Texas
Disconnect one
end of resistor
or condenser to
GOLDE SPOTLIGHT
STOPS
TRAFFIC! r
Long-life GoldE spotlights brighten
lobbies, displays, etc. U L Ar^
proved. Easiest to set up, most cnm
pact. Instant-lock tilt, heat-proof Iff
ncl lens, porcelain socket, asbestos curd,
removable cast base. Two models— 500
watts. 1000 watts blower-cooled. Pipe
clamps, color wheels, color frames avail
able. Sec >our dealer— or write to
^
GOLDE MANUFACTURING CO.
Dtpt. BO. 4888 N. Clark St., CHICAGO 40, ILL.
To respond to this advertisement. u.se the free postcard
This diagram stiows
proiectionists how to
use an ohmmeter to
check defectiye amplifier
components.
When there is trouble
in this mechanism
the thing to do is to
try to tie the trouble
down to some specific
unit in the sound
reproducing
system.
In this maKazlne and write In this .id's Ko.v No. :\i; v
36 The MODERN THEATRE SECTION