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1954-55 Theatre Catalog, 12th Edition, Page 325 (289)

1954-55 Theatre Catalog, 12th Edition
1954-55 Theatre Catalog
1954-55 Theatre Catalog, 12th Edition, Page 325
Page 325

1954-55 Theatre Catalog, 12th Edition, Page 325

The Picture Brightens

Summary of the Early Development of One of the Leading Carbons and Its Role in Lighting New Screen Dimensions

The worlds first are carbon industry came into being in the year 1877, when a Frenchman, Ferdinand Carre (founder of the Lorraine arc carbon industry), laid down the principles and succeeded in establishing industrial production of are light carbons. Prior to the year 1877, the electric arc, discovered by Davy in 1810, had remained a curiosity of the laboratory. All through the years, Lorraine carbons have been leaders in the world are carbon market, and at present, are more than meeting the exacting requirements of CinemaScope and the huge, wide screen light problems for more and more brilliant, intense light with their new methods of manufacture and continuous research.


In Pagny, where the Lorraine Orlux Carbons are manufactured, new, electronically-controlled ovens have been installed that are so huge that they occupy the area of a large city block; and so well engineered that heat changes are registered on graphs and meters down to the most minute fractions of degrees. From the time that the carbons enter the ovens to the time they emerge, the heating and cooling processes are electronically controlled. Heat plays an import-ant part in the processing of Lorraine Orlux Carbons. The baking ovens, or kilns, must be slowly brought to the proper temperature, and maintained for days at temperatures well above 2000 degrees F. This conditioning serves a double purpose of eliminating volatile matters from the material, and for the

hardening of the shells so as to give .

them the necessary mechanical strength and unique electrical characteristics in order to resist the high temperatures they are to be subjected to in the lamps. The slow heating and cooling periods make for complete uniformity and eliminate cracks and splitting that can occur in carbons that are not so closely watched during this heat-conditioning time. Also, all Lorraine Orlux cored carbons are electronically radioscoped with the object of eliminating all those that Show the slightest internal imperfections. This elimination is done automatically.

Exacting Requirements

Lorraine Orlux Carbons are sold world-wide, and must meet the most exacting requirements under all conditions. To make sure that Lorraine Orlux Carbons have a steadier and more even light distribution, spot checks are continually made during their manufacturing process. This phase of examination

TO OBTAIN maximum screen light keep intensin near the recommended maximum. and maintain

proper amperages. voltages. and an: gap.



President. Lorraine Carburu, Inc.

BRIEF: Without the proper amdunt 0/ light on the screen . . . all of the wonderful entertainment put on film . . . and the various methods of projecting this film . . . would all be worthless . . . Therefore . . . the arc carbon is certainly one of the most important items in the motion. picture theatre. This article gives some interesting historical background on the development of carbons . . . It discusses the manufacturing process . . . and various safeguards that are used to insure the uniform. quality of the finished product . . . There is valuable information about the various size carbons available . . . and what each is designed for . . . as well as a valuable section devoted to the use

have a larger core area, which enables better distribution of the light on to the screen. Also, all copper-coated Lorraine Orlux Carbons-and black carbons for the new, mirror reiiecting lamps up to the 11mm size-have a star core. The 13.6mm high intensity carbons have a new, distinctive, patented inner serrated shell, whereby the core material rests upon the edges of the inner serrations. This new approach enables Lorraine Orlux Carbons to be one of the steadiest burning carbons yet obtainable. The vents, surrounding the core, enable an even flow of gaSes at the are, making it possible for a steady, more brilliant light source.

Also, the new Lorraine Orlux Carbon trims are manufactured to absorb loads over and above their top recommended

amperage ranges. Many exhibitors, with

their present power equipment, can take advantage of these Lorraine extras, which#in many caseseis more than adequate to give them the additional light on the screen that they will require for the new screen ratios and CinemaScope. All that may be necessary is to increase the amperage and make slight feed control adjustments.

of carbons by the projectionist.

takes place in the large arc lamp test laboratory, where all types of lamps now in use in the world are gathered. The important physical characteristics of Lorraine Orlux Carbons are that they


. y

Amperage Voltage Arc lORRAINE ORLUX CARBON COMBINATIONS Range Range Gap Positive 0 Grade 0 Negative 0 Grade

High Intensity Lamps - Alternating Current

50 1 22 5mm 6 x 7 541-01C 50-60 25-27 6mm 7 x 14 542C 75-80 2527 6mm 8 x 14 542C

1 Kilowan- Reflector Lamps - Direct Current

7x12 541C 7x14 541C

40 27.5 5mm 6 x 9 545-20C

High Intensiry - Reflector lumps - Direct Current 7 x 12 544C

40-53 31-36 6mm 7 x M 5m: 6 x 9 545C a x 12 544C ' ' 50-70 32-39 6mm 8 x u 544C 7 x 9 545C Super 8': 68-75 36-39 6mm 3 x 12 - 544-1oc

75-35 39-41 a 7mm 9 x 14 544C 3 x 9 H 545C


High Intensirx - Reflector Lamps - New Type

9 x 17% 552-09

80-90 50-55 10mm 9 I 20 552-09 5/16" x 9 557C 95-110 53-53 11mm 10 x 20 55209 11/32" it 9 557C

115 62 11mm 10 x 20 552-09 3/8" x 9 557C 115-130 60-64 12mm 11 x 20 552-09 3/8" x 9 557C

High Intensity - Condenser Lamps - Regular and Super High

130-150 67-68 21mm 116 x 22 553-01 7/16" x 9 557C 140-170 68-72 22mm 13.6 x 22 523 l/T' l 9 555C 170-190 ; 69-73 24mm 13.6 x 22 583-08 1/2" x 9 555CN

Sonia mlgn. Hammond mu. oi mum. at mam..." arc gap. w. , w a saw inml . i . Meteor-Jumps - Direct Current

, ,, :6 was , wagging? x B 252 a x a 257
1954-55 Theatre Catalog, 12th Edition, Page 325