We use Optical Character Recognition (OCR) during our scanning and processing workflow to make the content of each page searchable. You can view the automatically generated text below as well as copy and paste individual pieces of text to quote in your own work.
Text recognition is never 100% accurate. Many parts of the scanned page may not be reflected in the OCR text output, including: images, page layout, certain fonts or handwriting.
SHOWMEN'S TRADE REVIEW. February 1, 1947
E-31
INFORMATION PLEASE
February 1, 1947
Showmen's Trade Review 1501 Broadway New York 18. N. Y.
Please send further information on story or item number:
NEW PHOTOCELL FOR THE NEW FILMS
(Continued from Page E-18)
1
11
21
31
2
12
22
32
3
13
23
33
4
14
24
34
5
15
25
35
6
16
26
36
7
17
27
37
8
18
28
38
9
19
29
39
10
20
30
40
The additional information I desire is
9
\ Name
( Theatre
\ Address
\ City and State
the assumption that there is no need to refocus a standard 1%-mil slit image optical system when the 1P37 tube is used in place of the 868.
(9) Relative Frequency Response. — For this check a standard theatre reproducing channel having an optical system with a iy4mil slit image was adjusted for maximum focus using a 9000-cycle loop. No low-pass filter was used since this might have had the effect of masking relative output at the higher frequencies. Frequency runs were then made using a calibrated test film which included 31 different frequencies between 30 and 9000 cycles. Response measurements revealed no differnce in relative frequency response when the 1P37 tubes was substituted for the 868.
Reports from the field are awaited in order to better judge the seriousness of the increased hum, and greater variation
in signal level with changes in exciter lamp voltage obtained with the 1P37 tube. No attempt will be made at this time to evaluate the seriousness of these 2 points.
It is felt, however, that the increased hum might be satisfactorily compensated by modification of the 120-cycle hum filter in those installations which operate with raw a-c on the exciter lamp instead of direct current.
For those installations which operate with d-c exciter lamps and which have some form of regulation of the exciter lamp voltage, it does not appear that the latter point would become a problem.
In the meantime, however, the tubes that have been substituted are working very well, indicating that no differences in operating characteristics have been observed, or else are not of sufficient magnitude to justify an immediate report. (#8).
YOU REMOVE ONLY THE SMALL, APPROXIMATELY 27 x 7 INCH "REMOVA-PANELS" FOR IMMEDIATE ACCESS TO ANY PART OF THE INTERIOR OF THE SIGN. IT IS NEVER NECESSARY TO LIFT OUT ANY LARGE, HEAVY FRAME UNIT WITH GLASS.
The greatest advance in changeable letter practice since ADLER originated the rigid supporting frame ior letters. "REMOVA-PANEL" is today's complete answer to the problem of maintaining changeable letter signs easily, quickly and at low cost. Cleaning, repairs, replacing lamps and fluorescent or neon tubing — all can be done the easy way— through "REMOVA-PANEL" !
Obtainable Only with . . .
ADLER
"THIRD DIMENSION" LETTERS
Sold under GUARANTEE THAT FOR EVERY ADLER LETTER YOU BREAK, WE GIVE YOU A NEW ONE FREE.
Marquee equipped with Adler "Remova Panel" Frames to save time and money in sign maintenance.
ADLER SILHOUETTE LETTER CO.
3021g West 36th St., Chicago 32 1451g Broadway. New York 18
CHICAGO . . NEW YORK . . TORONTO, CANADA . . LONDON, ENGLAND Covered by Patents Granted and Pending. Approved by Underwriters' Lab.. Inc.