US1470208A - Holder for lighting units - Google Patents

Description

R. D. VVARDELL HOLDER FOR LIGHTING UNITS Filed Dec. 6, 1920 g/ gum/whys Patented @et. 9, ilQEE.

i ROBERT D. VVARDELL, OF DETROIT, MICHIGAN.

." HOLDER FOR LIGHTING UNITS.

Application filed December 6, 1920.

To all whom it may concern.

Be it known that I, Bonner l). Viennnnn, a citizen of the United States. and resident oi Detroit, in the county of ayne and State of .ii'lichigan. have invented a certain new and useful improvement in Holders for Lighting Units, of which the following is a specification.

My invention relates to that class of de vices in which the lighting unit comprises a reflecting member and a bowl enamelled lamp. It is well known to persons skilled in the art that the most cflicient result is pro duced by a certain predetermined relationship between the bowl enamelled portion of the lamp and the reflecting member, and un less some means are provided for securing this, there is no way of maintaining an even efficiency for a lighting unit of this type.

My invention has for its object to provide an adjustable or telescopic holder which will accommodate various sizes of lamps, the necks of which are of course in varying lengths owing to the size of the lamp, and ha for its further object to mount the reflector so that it may be hung level regardless of its unevenness, and also to facilitate its cleaning.

My means of accomplishing the foregoing objects may be; more readily understood by having reference to the accon'ipanying drawings which are hereunto annexed and are a part of this specification in which Fig. 1 is a side elevation, a portion oi it being broken away to show the construction.

Fig. 2 is a side elevation, a portion of it being broken away to show the construction, the holder in this view being adjusted to a larger size lamp bulb.

Similar reference numerals refer to similar parts throughout; the entire description.

As shown in the drawings, I have illustrated a lighting unit which is provided with a bowl enamelled lamp 1 which may be mounted in a suitable socket (not shown) and is surrounded by a reflecting member 3 which may be of any suitable or desired configuration and formed otglass or suitably coated metal. The reflector is provided with a central opening, the edge 4 of which loosely rests upon the lower portion of a flaring member 5 which is a part of the adjustable holder.

It is invariably the case when a large reflector is blown, that one side is'thicker than the other; hence, when suspended the intents and purposes.

Serial No. 428,534.

unit will not hang true. I entirely overcome this defect by the loose mounting between the shade and holder as it makes it possible for the workman to place the reflector so that it is absolutely horizontal. The loose mounting also facilitates the cleaning as the reflector can be turned around on the holder so that all sides can be easily accessible from one point.

This holder comprises the downwardly and outwardly flaring member 5 which is provided with a plurality of holes 6 formed in the side walls thereof to afford ample ventilation for the escape of the heat generated by the lamp. By thus affording adequate and ample ventilation, the life of the lamp is greatly increased as it is well known to persons skilled in the art, that it rapidly deteriorates when the neck of the lamp is unduly heated.

The upper part of the member 5 is formed with a neck 7 terminating in a lip 8 which is adapted to be engaged. by the screws 9 of the standard holder. Within this member 5 I mount a sleeve 10 which is fitted to and coincides with the internal diameter of the neck 7 of the member 5, and is telescopically or slidably mounted there in. This cylindrical sleeve 10 is formed with an outwardly extending flange 11 at its upper end and a similar flange 12 at its lower end, the lower flange being adapted to engage the shoulder 13 formed by the neck 7 on the member 5. When a small lamp is employed, in a lighting unit, the sleeve is depressed into the member 5 until the flange 11 rests upon the lip S as shown in Fig. 1, and of course is not in use to all But when a larger lamp is wanted, then the sleeve 10 is drawn upwardly and outwardly as shown in Fig. 2 until the lip 12 engages the shoulder 13 in which case the screws 9 of the holder engage the sleeve 10 just below the flange ll, thus serving to hold the unit securely in position.

It will be apparent that by this simple arrangement, I provide a holder which is adaptable for any standard holder provided with the usual thumb screws and at the same time has provided simple and easily adjustable means for permitting the user to regulate his device to accommodate whatever size lamp he desires to use.

In order to prevent loss of the light rays escaping upwardly from the lamp, and

which would otherwise enter the interior of the member 5 and be lost, I provide an annular reflecting member 15 which fills the space from the lower edge 16 of the member 5 to the neck of the lamp 1. This annular member Liis preferably formed of reflecting material, although it will be Ola-- vious that it may be coated with paint or any other suitable light reflecting substance.

Having described my invention what I regard as new and desire to secure by Letters Patent is: A

1. In a device of the character described, the combination with an incandescent: electriclamp, ofa downwardly and outivardly flaring member, the upper end ot'which is provided with a lip, said member having a shoulder adjacent its smaller end, there being ventilating openings in said member, a cylindrical sleeve fitted to the internal diameter oftlie said member at its smaller end and slidable therein, a lip at each end or said sleeve, a reflector member of annular shape secured to the lower end of said downwardly and outwardly flaring member, the opening therein fitting the neck of the lamp.

2. In a device of the character described, the combination with an incandescent electric lamp, of a downwardly and outwardly flaringmember, the upper end of which is provided with a lip, said member having a shoulder adjacent its smaller end, there being ventilating openings in said member, a cylindrical sleeve. fitted to the internal diameter of the said member at its smaller end means formed on said sleeve which limit its movement between predetermined points and an annulus formed of reflective material secured to the large end or the downwardly" and outwardly flaring member.

In testimony whereof, I have signed the foregoing specification. 3 I

ROBERT D. VARDELL,

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