US1758290A - Lantern body for cinematograph and other projection apparatus - Google Patents

Description

y 1930. w. E. MccoRMAcK 1,758,290 7 LANTERN BODY FOR 'CINEMATOGRAPH AND OTHER PRQJECTION APPARATUS Filed June 14, 1929 mama? wzm aoe/wroxr Patented May 13, 1930 UNITED STATES QRFgQE WILLIAM EUGENE MQGORMACK, or sraenngpnnoiv, n vennnn LANTERN BODY non CINEMATOG-RAPH n' vpfoa'rrnn rRoJEorIoNnPP RAT-ns Application filed June 14, 1929, Seria1 No. 370,978,;and in Great Britain Jiunefit),1952.3;

whereby a current of air is caused automati- 5 cally to circulate therethrough when in use. My invention is designed to provide an improved form of lantern body in which the current of air circulating therethrough will According to this invention the sides and/or back and front of the lantern body which are bent longitudinally in opposite direct-ions, one end upwards, and the other downwards, the two bent ends being connected by a middle horizontal part. Below the optical centre of the lamp the outer parts ofthe louvres are bentdownwards, and the inner parts are bent upwards. Above the optical centre this arrangement is reversed,

the outer parts being bent upwards whilst.

V the inner parts are bent downwards. By this the lantern body is automatically caused as slats are so spaced apart thatthe bent parts overlap so as to prevent escape of the light from the inside of the lantern body to the outside. V

The two louvre slats adjacent the horizontal plane of the optical centre where the reversal of the louvres occurs, have their' inner parts bent at right angles to said plane.

My invention is illustrated in the accompanying drawing which shows a rear view of a lantern body constructed in accordance with my invention With the lamp in position and the back removed.

As shown the sides-of the lantern body are constructed of thin slats I mounted on cor-V ner posts 2. Below the optical centre of the lamp, the slats 1 have their outer longitudinal parts 3 bent downwards and their inner longitudinal parts 4 bent upwards. Above the optical centre the slats have their inner lon- .gitudinal parts 4 bent downwards and the outer longitudinal parts 3 bent upwards. The two slats which are adjacent each other where the reversal of the slats takes place x qeole tei aat fmet al y lci l through the lantern. body as soon as theair c -warm .of wh ch a ben leewarrangement a circulation of cold air through hiata h mr r .rer fl a t ter isallyite- Ward an Over ap n e h. 9. to pr a ieh ra e li rt thl it d he new body M v This arrangement ensnresihata current ,55

s, in the lantern body is;heated bytheda npl follow a smooth, even course, free from ed- I 10 dies or whirls. V

- el -Wire ni ces .inv' nt en' i applied to the side of alanternbody only, b,ut ,.60 if s e ba and-. r a m yrel p' be-conse med, on the. same principle, suitable ,prioare made of thin slats or louvres the ends of vision being made toqlholdingthe .refie'ctpr and lens respectively in their proper positions.- i I claim.:"" l 1. A lantern body for cinematograph,,and other projection apparatus sides formed, of spaced apart slats or, louvres, the

. dinally in :OPPOSltG; directionsn one andone downwards.

1 entem o y b cinema s arl e oth prei'e t en ,a'p e iatu eqmr i ae; ji l formed of spaced; apart; slats, or louvfres, the soon as the lamp is switched on. The louvre ends ct -which are bentlongitudinally-in, pp

s at-rear 1. I 3. A lantern body for cinematograph and other projection apparatus comprising sides forinedof spaced apart slats orlouvres, the ends of which are bent longitudinally in opposite directions, one upwards and one downwards,the direction of the bent parts of the slats or louvres below the optical centre of the lamp'being reversed. to that of the bent parts of the slats or louvres above the said optical centre, the bent parts of each slat orlouvre overlapping the bent parts of the next adj acent-slats, or louvres.

4. A. lantern body for cinematograph andgz other projeotionapparatus comprising sides formed of spaced apart slats or louvres,the ends of whichare bent longitudinally in opposite directions, one upwards and one downwards, the direction of the bent parts of the l slats or louvres below the optical centre of the lamp being reversed to that of the bent parts of the slats or louvres; above the said optical centre, the'bent parts of each slat or louvre 5 overlapping the bent parts. ofthe nextadjacent slats or louvres, the two slats or louvres adjacent the horizontal plane of the optical centre of the lamp having their inner-bent parts turned at right angles to the said plane 7 10 and overlapping each other.

5. A lantern body for projection apparatus having opposing walls formed of spaced slats, the slats of the upper portions of the walls having :their inner ends bent down- I, H

wardly and their outer ends bent upwardly, the slats forming the lower portions of the walls having'their inner ends bent upwardly and'their outer ends bent downwardly, the intermediateportions of allslats being sub-' zost-antially parallel and horizontal.

. 6". -A lantern body'having a wallimade up of upper and "lower series of slats, the upper seriesg.of slats presenting-intermediate hori- V zontal spaced portions with their inner ends r '2 5 deflected downwardly and their outer ends deflected upwardly, the lowerseries of slats "presenting intermediate horizontal spaced portions with their outer ends deflected down- "wardlyand their inner ends deflected up 7 wardly, the adjacent slats of the upper and ..lower series beinginterfitted toprevent light -passage therebetween; y V v 7; 'A lantern body having awall made up of upper and lower seriesof slats, the upper series of slats" presenting intermediate horizontal spaced portions with-their inner ends deflected downwardly anditheir outer ends dei flected upwardly, the lower series of slats presentin'g' intermediate horizontal spaced por- 4o'tions withtheir outer ends deflected down- "wardly and their inner fiends deflected upwardly, the adjacent slats of theupper and lowenseries being lapped to prevent light passage "therebetwe'en. 1 v

* In testlmony whereof I have hereunto set J my hand this thirtieth day of May, 1929. V I, MCCORMAOK. J

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