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Plan now to order those new post-war
PROJECTION ARC LAMPS
as soon as they are available. Their performance and efficiency will be as brilliant as the light which they deliver.
NATIONAL
T H E AT R E S U P P
Otvislon of National • Simplex • Biudworth.tnc.
■THERE'S A BRANCH NEAR YOU'
the new Seventh Edition —
Bluebook of Projection
By F. H. RICHARDSON «7-25
Postpaid
The Seventh Edition of this standard textbook on motion picture projection brings to all persons concerned with screening 35 mm. film, up-to-the-minute guidance. Additionally, the Seventh Edition contains four chapters on Theatre Television, prepared for the practical instruction of motion picture projectionists. Send your order to —
QUIGLEY BOOKSHOP, 1270 Sixth Avenue, New York, 20
believe that we projectionists can make o voices heard in the matter whenever ai wherever the opportunity arises to help oi selves to gain the advantages for our ov projection rooms.
► End-play on the flywheel side of the Inte mittent usually results in lost motion betwetr: the intermittent and shutter shaft that pn' duces "travel ghost." It Is well to check \\ Intermittent flywheel for such end-play reg' larly and make adjustments promptly.
► Sluggish arc feed motor operation me often be traced to over-oiling of the moteAn oil-drenched commutator soon turns brovv In color, and good contact between the mote brushes and the surface of the commutator Impossible. This difficulty can often be recoc nized by unusually slow action during the fir: reel or two, which requires considerable a.c vancement of the motor control rheostat t^ maintain the proper arc gap. After the mote has been in operation for some time It wi begin to pick up and. the rheostat must b. dropped back to avoid freezing the carbonFeed control motors should be oiled ver carefully and only at
the intervals recom A A ^, y mended by the manu \^J(AJIJoUju^
facturer of the lamp. — "
J
Index of ADVERTISER in BETTER THEATRE
Pag
Adler Silhouette Letter Co 2
Altec Service Corp 2
American Pop Corn Co X
American Seating Co
Automatic Devices Co %
Ballantyne Co., The 2i
Bausch & Lomb Optical Co Ji
Bigelow-Sanford Carpet Co 11
Chicago Expansion Bolt Co 2'
DeVry Corporation 2.'
Essannay Electric Mfg. Co li
Fensin Seating Co 1
Forest Mfg. Corp
General Electric Co., Lamp Div 1
Goldberg Bros 21, 2
Hertner Electric Co., The 2
Kawneer Co., The
Kroehler Mfg. Co 4
LaVezzi Machine Works 1
Marsh Wall Product, Inc 1
Motiograph 1'
National Carbon Co., Inc 2
National Theatre Supply 17, 2
Projection Optics Co., Inc
RCA Service Co., Inc 2
Radio Corp. of America
Robin, Inc., J. E
S. O. S. Cinema Supply Corp 2
Stoner Corp., The 1
Strong Electric Corp., The
Theatre Managers Institute 1
Union Carbide & Carbon Co 2
Wagner Sign Service, Inc
Wenzel Projector Co., The 2
Westinghouse Electric Elevator Co., Air-Conditioning Div
26
BEHER THEATRES. DECEMBER 9. 194