US1893606A

US1893606A - Lighting device

Info

Publication number: US1893606A
Application number: US387447A
Authority: US
Inventors: Wilson Welsey
Original assignee: WILSON LIGHTING Inc
Current assignee: WILSON LIGHTING Inc
Priority date: 1929-08-21
Filing date: 1929-08-21
Publication date: 1933-01-10
Anticipated expiration: 1950-01-10

Description

Jan. 10, w, w s 1,893,606

LIGHTING DEVICE Filed Aug. 21, 1929 2 Sheets-Sheet 1 filiruem on' M17 or)? gys.

W. WILSON LIGHTING DEVICE Jan. 10, 1933.

Filed Aug. 21, 1929 2 Sheets-Sheet juenfor:

Patented Jan. 10, 1933 UNITED STATES PAT T OFFICE WESLEY WILSON, OF CHICAGO, ILLINOIS, ASSIGNORQTO WILSON LIGHTING, INC., OF

CHICAGO, ILLINOIS, A CORPORATION OF ILLINOIS I LIGHTING DEVICE Application filed August 21, 1929.

My invention relates to light devices. One of the objects of my invention is to provide a cheap and efficient reflector for win- .dow and display lighting which will be adaptable to any standard electric lamp socket without the installation of a holding means between the socket and the reflector other than that of the lamp itself. This has a decided advantage over the construction in common use at present in that practically all store windows are equipped with lamp sockets, while it is the duty of the tenant to supply a means for holding his reflectors. The installation of the present type of reflector holders requires considerable time and trouble, while the cost of the holder itself is considerable and it must be of different lengths for different sizes of lamps.

A further object is to provide a reflector which scientifically controls the light and which will automatically maintain the lamp filament in substantially the correct focal position when different sized lamps are used. With the type in common use at present the effectiveness of the unit is very often completely destroyed by inserting the wrong sized lamp.

A further object is to provide a reflector that is adjustable without necessitating movement of the lamp and socket.

A further object is to provide a cheap and efiicient color screen holder which will allow for shrinkage of the color screen or filter medium and still hold it suificiently rigid to look neat.

A further object is to provide a reflector that is extremely easy to take down and install.

A further object is toprovide a reflector having a portion of its reflecting surface cut away so as to permit the direct rays to illuminate at an angle of approximately 90 to the axis of the reflector.

Further objects will appear from the de scription and claims.

In the drawings, in which several embodi ments of my invent-ion are sh0wnflector adjustably mounted on a bulb;

Serial No. 387,447.

Fig. 2 is a view of the reflector as seen from the direction of the arrow 2 in Fig. 1; i

Fig. 3 is a section on the line 3-3 of Fig. 2 showing the adaptability of the mounting for different sizes of bulbs;

gig. 4 is an axial section of a modification; an I Fig. 5 is an axial section of a still further modification.

Referring to the drawings in detail and first to Figs. 1, 2 and 3, the construction shown therein comprises an electric lamp 1 which may be of any usual or suitable type mounted with its axis in vertical position, a

reflector 2 having a polished reflecting surface adjustably mounted on said bulb, and a color screen secured across the open side of the reflector to enable different colored lighting effects to be obtained.

The reflector has an elongated slot 4 through which the neck 5 of the bulb extends, the slot being so designed as to permit considerable angular adjustment of the reflector. In order to close that part of the slot 4 which is not being occupied by the neck of the bulb,

I provide a slidable closure member 6 having an opening 7 therethrough, the edge of which fits around the neck of the bulb. This closure member 6 fits underneath the flanges 8 struck up from the material of the reflector and is slidably retained and guided by these flanges. In order to hold the slidable closure in adjusted position a threaded stud 9 is secured to the reflector adjacent the edge of the slide and a clamping nut 10 is i inexpensive and eflicient adjustable polished 1 reflector may be provided for any window and display installation in which the lamps extend downwardly from the sockets with their axes in substantial vertical position, without necessitating any additional holding means between the socket and reflector other than the lamp itself.

Each spring wire gripping member comprises a circular portion 11 for engagement with the spherical portion of the lamp bulb and a pair of spring arms 12 extending from this circular portion out through suit-ably placed openings in the sheet metal reflector, the ends 13 being bent laterally along the outer surface of the reflector and both being secured underneath a single rivet 14 which secures them to the reflector. As shown in Fig. 3, the construction is such as to enable the spring gripping members to readily accommodate bulbs 11 of considerably different diameters, and also provides easy cleaning of the reflecting surfaces.

In Fig. 4 is shown a simpler cheaper form of reflector in which the adjustable slide which fits around the neck of the bulb is omitted, the color screen also being omitted for the sake of simplicity and cheapness.

In Fig. 5 is shown a form in which the opening 15 through which the neck of the bulb extends fits snugly around the neck of the bulb but in which no adjustment is provided except such as may be eflected by swinging the reflector about the axis of the bulb, the opening through which the neck extends being so located as to give the tie sired tilt to the reflector. In this form an opening 16 is provided in the reflector to per- -n1it direct rays to escape to illuminate any sign or other display which may be made on or near the window 17 betweenthe

lines

18 and 19. In this form, means are provided to prevent the striations which are usually formed by reason of the fact that the light source is not a point but has a substantial extent. In order to prevent these striations, the reflector is made with a zoned wave formation, the curvature of each zone being just suflicient to prevent the striations referred to. In order that each zone may receive approximately the same amount of li 'ht, the zones are so designed that the angles A, B, C and D from the center of the light source to the meeting points of the diflerent zones are substantially equal.

The color screen may be, if desired, formed of a. flexible sheet of gelatine held in place in the annular recess of the reflector by means of a resilient wire ring 20. This resilient ring 20 is so designed as to hold the edge of the sheet of gelatine with a light tension which will permit a slight slippage of the edge of the gelatine sheet if the sheet contracts due to the heating action of the lamp or other causes thus preventing the gelatine sheets from being stretched to tlie point of rupture. The ends of the resilient ring 20 may be bent outwardly slightly to form finger-engaging pieces 22 to facilitate removal and replacement of the ring and color screen. The color screen may be applied in the first instance by taking a sheet of gelatine somewhat larger than the size required to cover the opening, fitting it over the resilient ring and into the annular recess 21 in the reflector permitting the resilient ring to expand to grip the sheet and hold it against the surface or" the annular recess and thereafter trimming the superfluous portions of the gelatine sheet by means of shears or a knife or any suitable instrument.

In order to prevent too great an angle of light spill through the opening provided for the neck of the lamp bulb, the sides may be formed upward as shown at 23 in Fig. 4.

In claim:

1. The combination with an electric lamp having a contact base, a bulb portion, a neck portion connecting said bulb and base, and a light source in the bulb portion, of a concave reflector in which the bulb portion is located having an elongated slot through Whichthe neck portion of the bulb extends, the side edges of which slot are spaced apart such a distance that they both lie close to the neck portion and the end edges of which are spaced apart such a distance as to permit a substantial movement of the reflector with respect to the neck portion, and means for supporting said reflector for swinging movement on said bulb comprising a pair of opposed spring loop members embracing the bulb portion, said loop members lying on opposite sides of the plane through the center line of the slot and the light source.

2. The combination with an electric lamp having a contact base, a bulb portion, a'neck portion connecting said bulb and base, and a light source in the bulb portion, of a concave reflector in which the bulb portion is located having an elongated slot through which the neck portion of the bulb extends, the side edges of which slot are spaced apart such a distance that they both lie close to the neck portion and the end edges of which are spaced apart such a distance as to permit a substantial movement of the reflector with respect to the neck portion, and means for supporting said reflector for swinging movement on said bulb comprisin a pair of opposed spring loop members embracing the bulb portion, said loop members lying on opposite sides of the plane through the center line of the slot and the light source, and said loop members comprising circular portions engaging the sides of the bulb and lying in planes parallel to said center line plane.

3. The combination with an electric lamp having acontact base, a bulb portion, a neck portion connecting said bulb and base, and,

a. light source in the bulb portion, of a concavev reflector in whichrthe bulb portion is located having an elongated slot through which the neck portion of the bulb extends, the side edges of which slot are spaced apart such a distance that they both lie close to the neck portion and the end edges of which are spaced apart such a distance as to permit a substantial movement of the reflector with respect to the neck portion, and means for supporting said reflector for swinging movement on said bulb comprising a pair of opposed spring loop members embracing the bulb portion, said loop members lying on opposite sides of the plane through the center line of the slot and the light source, said loop members comprising circular portions engaging the sides of the bulb and lying in planes parallel to said center line plane, and each loop member comprising a pair of spaced arm portions secured to said reflector and extending therefrom at points adjacent a side edge of said slot.

4. The combination with an electric lamp having a contact base, a bulb portion, a neck portion connecting said bulb and base, and a light source in the bulb portion, of a concave reflector in which the bulb portion is located having an elongated slot through which the neck portion of the bulb extends, the side edges of which slot are spaced apart such a distance that they both lie close to the neck portion and the end edges of which are spaced apart such a distance as to permit a substantial movement of the reflector with respect to the neck portion, and means for supporting said reflector for swinging movement on said bulb comprising a pair of opposed spring loop members embracing the bulb portion, said loop members lying on opposite sides of the plane through the center line of the slot and the light source, and each loop member comprising a pair of spaced arm portions secured to said reflector and extending therefrom at points adjacent the edge of said slot.

5. The combination with an electric lamp having a contact base, a bulb portion, a neck portion connecting said bulb and base, and a light source in the bulb portion, of a concave reflector in which the bulb portion is located having an elongated slot through which the neck portion of the bulb extends, the side edges of which slot are spaced apart such a distance that they both lie close to the neck portion and the end edges of which are spaced apart such a distance as to permit a substantial movement of the reflector with respect to the neck portion, means for supporting said reflector for swinging movement on said bulb, and a shield having an opening through which the neck of the bulb extends slidably mounted on said reflector for covering the portion of the slot remote from the neck of the bulb.

6. The combination with an electric lamp having a contact base, a bulb portion, a neck portion connecting said bulb and'base, and a light source in the bulb portion, of a concave reflector in which the bulb portion is located having an elongated slot through which the neck portion of the bulb extends, the side to the neck portion, means for supporting said reflector for swinging movement on said bulb comprising a. pair of opposed spring loop members embracing the bulb portion, said loop members lying on opposite sides of the plane through the center line of the slot and the light source, and a shield having an opening through which the neck of the bulb extends slidably mounted on said reflector for covering that portion of the slot remote from the neck of the bulb,

7. The combination with an electric lamp having a contact base, a bulb portion, a neck portion connecting said bulb and base, and a light source in the bulb portion, of a concave reflector in which the bulb portion is located having an elongated slot through which the neck portion of the bulb extends, the side edges of which slot are spaced apart such a distance that they both lie close to the neck portion and the end edges of which are spaced apart such a distance as to permit a substantial movement of the reflector with respect to the neck portion, means for supporting said reflector for swinging movement on said bulb, and a shield having an opening through which the neck of the bulb extends slidably mounted on said reflector for covering the portion of the slot remote from the neck of the bulb, said shield lying outside said reflector.

8. The combination with an electric lamp having a contact base, a bulb portion, a neck portion connecting said bulb and base, and a light source in the bulb portion, of a concave reflector in which the bulb portion is located having an elongated slot through which the neck portion of the bulb extends, the side edges of which slot are spaced apart such a distance that they both lie close to the neck portion and the end edges of which are spaced apart such a distance as to permit a substantial movement of the reflector with respect to the neck portion, and means for supporting said reflector for swinging movement on said bulb comprising a pair of opposed spring members embracing the bulb portion therebetween and having a pivotal centering engagement therewith, said spring members lying on opposite sides of a plane through the center line of the slot and the light source.

9. The combination with an electric lamp having a contact base, a bulb portion, a neck portion connecting said bulb and base, and a light source in the bulb portion, of a concave reflector in which the bulb portion is located having an elongated slot through which the neck portion of the bulb extends,

the side edges of which slot are spaced apart such a distance that they both lie close to the neck portion and the end edges of which are spaced apart such a distance as to permit a substantial movement of the reflector with respect to the neck portion, and means for supporting said reflector for swinging movement on said bulbcomprising a pair of opposed spring, centering members embracing the bulb portion therebetween and having a pivotal centering engagement therewith, the line through the pivotal centers of said spring members being substantially perpendicular to the plane through the center line of the slot and the light source.

In witness whereof, I have hereunto subscribed my name.

XVESLEY WILSON.