US1806209A - Roundel holder - Google Patents

Description

May 19, 1931. R. E. MAJOR ROUNDEL HOLDER Filed Feb. 6, i930 11/52 7256565 fi/ f/b we.

May 19, 19.31.

R. E. MAJOR 1,806,209

ROUNDEL HOLDER Filed Feb. 6, 1930 2 Sheets-Sheet 2 16 i, I I: 13

I v [720672207 ZL'ZZ7Z65Q619 5 7/2 /0 4J4 M, 7PM W Patented May 19, 1931 teeazee FFEQE ROSCOE E. MAJOR, OF CHICAGO, ILLINOIS, ASSIGNOR TO MAJOR EQUIEMENT 00., INC, OF CHICAGO, ILLINOIS, A CORPORATION OF ILLINOIS EOUNIJEL HOLDER Application filed February 6, 1930. Serial No. 426,297.

ferred to are used extensively in theaters,

public halls and exhibition rooms and the like, especially where reflectors are used and where color effects are desired. They are much used in connection with'indirect or flood lighting and in many instances are only accessible from the rear of the fixture, as when the lights are high up on the walls or are in or near the ceiling, as in cove lighting. Roundels of various sort are commonly set each in the mouth of a bell shaped shell or lamp housing of a general type such as illustrated in the accompanying drawings.

In theatre lighting especially, the lamp housings or reflectors, usually of single lamp unit style are often placed in positions where access from the front is either impractical or not permissible. The maintenance operator can only reach such units with one hand through a special rear wall opening provided for the purpose, as will be more fully described, and he must be guided in making changes entirely by the sense of touch. For this purpose the fastener or look must be easy to operate and must have no movable parts such as might get lost; and the lock must be entirely positive and reliable. Heretofore these needs have not been met.

The main objects of this invention are to provide an improved, simple and substan- 40 tial holding device for the roundel, lens or screen; to provide a self contained and re liable mechanism of this sort with no removable parts; to provide a roundel holder construction which the maintenance'attendant may gain manual access to and operate by the sense of touch; to so provlde that he may then remove and replace the lens or other member and finally restore the unit as a whole to normal condition, all with one hand; to provide a lamp housing or reflector with a roundel holding rim of substantially rigidform and adapted to embracingly grip the roundel releasably' by simple rotary movement; to provide for telescopic action of complementary arcuate peripheral edge gripping means; to unify the movable locking means; and to assure constant positive alinement of the coacting complementary telescopic holding members.

An illustrative embodiment of this invention is shown by the accompanying drawings in which:

Figure 1 is a front elevation of a single lamp unit reflector type of roundel holder, with the lens inplace and with the lock closed.

Fig. 2 is a fragmentary axial section on the line 22 of Fig. 1, and shows the conoidal bell shape of the reflector shell or roundel holder.

Fig. 3 is a fragmentary side view of the device as viewed from the left of Fig. 1..

Fig. 4: is a view similar to Fig. 2 but with the lens removed, the lock being closed.

Fig. 5 is a front elevation of the device as viewed in Fig. l but with the fastener wide open and with the lens partly removed.

Fig. 6 is an enlarged section on the line 6-6 of Fig. 5.

Fig. 7 is a perspective view of the device in its open condition and with the lens removed.

Fig. 8 is a section on the line 8-8 of Fig. 4, the lens being removed and the lock closed.

Fig. 9 is a diagrammatic view illustrating how the lights and roundel holders herein referred to may be positioned and how they may be gotten at from the rear for renewals and repairs.

Referring to the drawings the lighting elementor lamp, not shown, is housed in a sheet metal shell like reflector or roundel holder 1 secured at its base 2 to a support or fixture 8. The lens, color screen or other roundel accessory 4 is demountably secured to the reflector rim 5 which in this instance is formed to receive the roundel 4: edgewise to enter the inwardly facing edge channel se ment 6, integral with the body 1.' A complementary movable channel segment 7 the main axis ofthe reflector is inclinedor horizontally disposed, the shade is posiis telescopically related to the fixed segment 6, and is so 'proportioned'relatively thereto that when moved to minimally overlie the v 1. same itwill circumferentially complete the mally overlieth'e segment 6 the holder will be openand .the roundel 4 may be removedor introduced',-as will be apparent from Fig. 51'

'Morein detail the lock channel disa V I I U range of utility, but it 1s especlally advanformed by spinning over the edge of the reflector shell 1 inwardly as shown at the lower edge 'of Fig. 4 and then cutting awayabout one hundred and eighty degrees of the cylindrical wallpart .8 and corresponding outer flange part .9 as appears in'Fig. 7.

This form of holder Ifreely' admits the r-Qundel 4. In order to provide for effective control and operation of the segment 7, a

peripherally slidable collar'lQ of sheet metal is-attached to the rim of shade 1,-which collar comprises the complementary channel 7. The collar 10 is formed by spinning the innerfa'nd more'restrijcted part to fit snugly over the corresponding edge part of reflector 1 and then spinning the outer edgejpart to form achannel ;7 to snugly embrace the fixed channel- 6.; Then part of-thisl rotary channel'is removed by cutting away about half of the 'wall part 11 and end flange12, as apparent from Fig. 7. ,The are of the outer channel segment? is made somewhat greater than that of the inner segment 6, preferably about to degrees, so asto accommodate 7 the stop member 13'on segment 7 and also assure substantial overlap of the channels when the lock is, closed. With this inview the arcrof channel 6 is preferably a little less than 180 and the arc of channel 7 a little greater than 180. A handle 14; is fixed on channel 7-to facilitate; reciprocation thereof. This handle is carried by a small angle fitting 15 which is securedby rivet 16 passing through the wall 11 and also if desired through the stop block 13. 1 These parts are or may be further unified by solder or brazing. The handle and stop.v unit is slightly spaced from one end of channel 7, so as to permit the over-lapindica'tedat-IS on Fig. 1 when the lock is closed. The overlap on, the opposite side is indicated at 19. Therearward edgeof-ring 10 is spun outwardly and "backwardly to form a stiffening roll or bead 20.

When the lock is open the segment :7 I at its stop end slightly overhangs the gap 21 of j reflectorhbut the opposite end is substantially flush with the corresponding end of,

channel 16, as in Fig. 5. f Whenever, as usual,

tio'ned so that the fixed'channel 6 is on the lower side, thus assuring that gravity will tend to help retain the roundel in place.

' s mm date edgewis admissi n drawings.

The device of this invention has a'wide tageous in cove lighting as in Fig. 9. Here the hghtingunlt is set 1n a ceihng cove where the shadel and roundel l are ordlnarily accessible only through a hand hole 31, or the like, in the wall or ceiling 32; the attendant being positioned on the eat-Walk? 33. In order to renew the lamp or change the roundel he hasto reach with one. hand through the hole 31, and guided by touch, grasp the'lock handle 14: and then slide the channel ringlO counterclobkwise, as viewed in Fig 1, to theposition shown in Fig. .5.

After the changes are made the reverse operation is followed w Although but one specific embodiment of this invention is herein-shown and described,

it is tobe understood that nunjierousv details of the construction shown and materials used may be alteredor omitted without d e? parting from the spirit of theinvention as defined by the following claims. I

.Iclaim: 7 1. A holder of the class described comprising a plurality ofnormally inseparable annular coaxial members united in mutually rotary relation, each having an inwardly facing segmental-a ienate channel formed edgewise t n, said ann a members being 'mutually. nested and the channels thereof being formed to accommodate mu? tual telescopic adjustment for locking "and for release action. T r

coll idal lamp larger end-fo the interchangeable attache ment of roundel means .and comprising a plurality of. .circum'ferentially distributed a-rcuate members formed and adapted to en-J gage theedges of the roundel means, said ar'cuate membersbeing mutually. slidable manually to more or less overlap for lateral opening-of the engaging means whereby to and. re= lease of the roundelmeans-1, I

3. A. conoidallampreflector fitted at its larger end for the interchangeable attachment of roundel means and comprising a.

plurality of circumferentially distributed arcuate membersformed and adapted =to engage the'edges of the roundel means, one of said members being integral with the reflector and another of said mem'bers being telescoplc ally related thereto whereby it may be moved tooverlapthe same for'releasing the roundel means and may also be moved to supplement the said integral member for securing the roundel means in place.

4. A circular rimmed lamp reflector having on its rim a roundel holder comprising a pair of mutually supplemental and circumferentially arranged inwardly facing channel members, one of which is integral with the reflector and the other being peripherally slidable to lock and to release the roundel, the latter channel member having an annular support integral therewith to slidably engage the rim of said reflector.

5. A device of the class described comprising a circular rimmed lamp reflector having a pair of mutually nested conoidal rings each formed with an arcuate inwardly facing channel, one of said rings being integral with the reflector and the other being slidable circumferentially thereon to vary the mutual relation of the said arcuate channels, the movable outer channel having a stop therein adjacent to one end to limit opening and closing movement by contact with the ends of the fixed channel and also prevent axial displacement of the movable ring by sliding contact with the fixed ring.

Signed at Chicago this third day of February, 1930.

ROSCOE E. MAJOR.

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