Kinematograph year book (1949)
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480
The Kinernato graph Year Book.
especially of a balcony theatre, to be much reduced, giving a better viewing angle from the circle seats, and of course reducing building costs and improving acoustics.
The same author advocates the abandonment of the conventional masked screen, in favour of a screen in which the edges are vignetted (28); the successful achievement of this effect may necessitate the partial redesign of the forward part of the auditorium. In the same journal similar arguments are advanced by R. Gillespie Williams — well-known in this country for his lighting equipment— for a screen with a narrow black border, which is silhouetted against an illuminated area, the colour of which can be changed to suit the mood of the picture. (29)
The use of fluorescent discharge lighting for the auditorium has been suggested, (so) Problems of dimming can, it is urged, be overcome either by means of mechanical shutters, or by voltage control through a reactive transformer.
The problems of maintaining even volume level in stage amplification systems, and of assuring ease of control, have been met by RCA in a newly developed system. An ingenious automatic lift for raising
and lowering stage microphones has been introduced by Walturdaw, which enables microphones to be controlled either from the stage switchboard, or from the amplification control console. (31)
British Standards
The work of the Cinematograph Industry Committee of the British Standards Institution covers an increasingly wide range of subjects. (32) Among drafts circulated for comment during the past year are specifications relating to the 2,000 ft. reel, 2,000 ft. film spools, projection lenses, and exit boxes, and a number can be expected during the next few months.
The following specifications have been issued or revised : — ■
530 : 1 948 : Graphical Symbols for Telecommunications.
777 : 1947 : Film strip and film slides.
1380 : 1947 : Speed and exposure index of photographic negative materials (amendment PD684).
1383 : 1947 : Photo-electric exposure meters.
1384 : 1947 : Measurements of photographic transmission density.
1404 : 1947 : Screen brightness for the projection of 35 mm. film.
TECHNICAL REFERENCES
(1) Kine. Weekly, June 19, 1947, p. 6.
(2) British Kinematography, Oct. 1948, p. 121.
(3) Kine. Weekly, Oct. 14, 1948, p. 32 ; Ideal Kinema, Nov. 1948, p. 20.
(4) Kine. Weekly, Oct. 21, 1948, p. 3.
(5) Kine. Weekly, Nov. 18, 1948, p. 6.
(6) /. Soc. Mot. Pic. Eng., Aug. 1948, p. 127 ; Ideal Kinema, Oct. 1948, p. 23 : Nov. 1948, p. 9.
(7) Ideal Kinema, May 1948, p. 21.
(8) Ideal Kinema, Nov. 1947, p. 13 : Dec. 1947, p.23.
(9) F.I.A.T. No. 97, item 9 ; /. Brit. Kine. Soc., July 1946, p.97.
(10) Ideal Kinema, March 1948, p. 19.
(11) Ideal Kinema, Nov. 1948, p. 19.
(12) Ideal Kinema, March 1948, p. 29.
(13) Kine. Weekly, Export Issue, 1948, p. 21.
(14) Kine. Weekly, Export Issue, 1948, p. 27.
(15) /. Soc. Mot. Pic. Eng., May 1948, p.489.
(16) Ideal Kinema, May 1948, p.23.
(17) Kine. Weekly, Export Issue, 1948, p. 16.
(18) Ideal Kinema, Jan. 1947, p. 21.
(19) Ideal Kinema, Aug. 1948, p. 20.
(20) Ideal Kinema, Jan. 1948, p. 19.
(21) Kine. Weekly, Export Issue, 1948, p.25.
(22) Kine. Weekly, Export Issue, 1948, p. 26.
(23) Kine. Weekly, Dec. 16, 1948, p. 90.
(24) Kine. Weekly, Export Issue, 1948, p. 34 ; Ideal Kinema, Jan. 1948, p. 33.
(25) Ideal Kinema, Oct. 1948, p. 19.
(26) Ideal Kinema, Oct. 1948, p. 16.
(27) J. Soc. Mot. Pic. Eng., April 1948, p. 303.
(28) J. Soc. Mot. Pic. Eng., April 1948, p. 367.
(29) /. Soc. Mot. Pic. Eng., April 1948, p. 374.
(30) Ideal Kinema, May 1948, p. 16 ; /. Soc. Mot. Pic. Eng., June 1948, p. 571, 593, 601 : July 1948, p. 1 1 . *
(31) Ideal Kinema, July 1948, p. 30.
(32) Brit. Kine., July 1948, p. 21.
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