US1683599A

US1683599A - Luminair

Info

Publication number: US1683599A
Application number: US710150A
Authority: US
Inventors: Berry Percy William
Original assignee: Holophane Corp
Current assignee: Holophane Corp
Priority date: 1923-05-01
Filing date: 1924-04-30
Publication date: 1928-09-11
Anticipated expiration: 1945-09-11

Description

Se t; 11, 1928. 1,683,599

- P. W. BERRY LUMINAIR Filed April 30, 1924 INVENTUR Tl .Ercy William/Berry Patented Sept. 11, 1928.

UNITED" STATES PEBCYW1LLIAMBEBRY,0F READING, ENGLAND, AssieNoR, BY MnsNn ssiGiv MENTS, T HOLOPHANE COMPANY, INC., ornnw YORK, a; Y.,A CORPOR TION 01* nnw YORK.

Application filed April 30, 1924, Serial No. 710,150, and in dreat Britain'May 1, 1923.

The object of the present invention is the manufacture of an apparatus for lighting, more particularly suitable for use in cinematograph theatres, which is designed to produce a pleasing eifect on the audience by special combinations of colors and allows of the lights being kept on during the performance, without causing any disturbance to persons watching the picture screen.

According to the present invention, in apparatus for lighting, I interpose a color screen between the light source and a prismatic reflector and diffuser. In this way, a soft halo effect is produced round the bowl, which is extremely restful and can be made nerve soothing in its effect by appropriate choice of colors. 1 Preferably, the color screen is not wholly of one color, but of several colors merging into one another. For example, part of itm'ight be purple and the rest orange, but without a sharply defined junction. The various lightsources may be provided with different colored screens, according to a system for producing the desired effect on the audience in the theatre. Each light source and its attendant apparatus is carried in a recess in the theatre ceiling, so that all direct light is cut off from the picture screen and so that no points of lights stand out to catch the eye of an observer watching the picture screen. The light source, colored screen, reflector and bowl are contained in a box of suitable construction. If access may be conveniently had from above the ceiling, the upper part of the box carrying the light source screen and reflector is hinged so that it may be raised for inspection, renewals, or cleaning. If access cannot be had to the top of the box, and a ladder if used for inspection, etc., from below, the lower part of the box carrying the prismatic glass bowl is hinged.

In the accompanying drawings:

Fig. 1 is a vertical cross section of the apparatus, used when access may be had from above, and

Fig. 2 is a vertical cross section of the apparatus used when access may be had from elow.

Fig. 3 is a diagram in cross section showing the form of apparatus used when the ceiling is not recessed.

In both forms of apparatus, a light source 1 (shown here as an electric lamp) carried LUMINAIR.

in the usual manner from a gallery 4 by PATENT oF lcE.

by an ordinary bayonet catch holder 2 is surrounded by a colored globe 3 supported screws 5 co-acting with a rim 6 on the globe. A prismatic glass reflector 7 is retained by the gallery 4 working on the outside of the holder 2. v 7

Referring now more particularly to Fig. 1, the holder 2 and gallery 4 are attached to the upper half 8 of a box 9. To the lower half 10 of the box 9 is attached a flanged collar 11 carrying a prismatic glass bowl 12,

screws 13 being provided to prevent accidental displacement of the bowl. The lower half 10 of the box 9 is fixed in any convenient manner in a recess 25 in the ceiling 26, as above described. The upper half 8 is hinged at one side to the lower half by the hinge 14, and is on its other side provided with pivoted screw 15 engaging in a slotted spring plate 16 attached to the upper half 8. A wing nut 17 serves when tightened to hold the box closed.

Referring now moreparticularly to Fig.

2, the holder 2 and gallery 4 are attached to the top of a box 18. To the lower, edge of p the box 18 is attached at one side by means of a hinge 20 a flanged'collar 19, carrying a prismatic glass bowl 21, screws 22 being provided to prevent accidental displacement of the bowl. The collar 19 is supported at.

suitable points on its periphery by means of screws 23 and wing nuts 24. The whole box is mounted in any suitable manner in a recess 27 in the ceiling 28, as above described.

A third form isshown in the diagram indicated in Fig. 3, in which parts identical with Fig. 2 are employed except that the apparatus is placed flush with the ceiling 29 and a screen 30 of any material such as plaster, metal or composition surrounds the other parts of the luminaire to cut off the rays in the desired manner. This is'the type em loyed where the ceiling is not recessed an the cut-off features of the invention are desired to be preserved.

I claim: 1. A luminairefor cinematograph theatres comprising a light source, a prismatic bowl totally enclosing the source, a colored envelope surrounding the lamp within the bowl and an open mouthed screen surrounding the edge of'the bowl the wallsof the screen extending far enough below the edge in the bowl, the Walls of the ceiling recess: of the-howl to put .ofii' all direct rays from extending far enough below the edge of the in reaching the screen or the spectator. bowl to out off all direct rays from reaching 2. A luminaire for einematograph theatres the screen or the spectator.

- comprising a ceiling recess, and housed S'gned at London England this QQnd do it-h h me e light r es Pri m of Ap il, 1.92%- bowl totally enclosing the source and a colored envelope surrounding the lamp with: PERCY WILLIAM BERRY.