US1594742A - Lamp - Google Patents

Description

J. E. LORD LAMP 7 Filed Ded. 21, 1923 2 Sheets-Sheet 1 Fig.2.

INVENT OR. G161 wf Aug. 3 1.926.

J. E. LORD LAMP Filed Dec 21 1923 2 Sheefcs-Sheet '2 INVEN TOR Patented Aug. 3, 1926.

iterate JOHN ERNEST LURE, OF

manonas'rnn, ENGLAND.

LAMP.

Application filed. December 21, 1923, Serial No.

This invention relates to an improved construction of lamp of the typein which lenses are disposed around the source of light to concentrate the rays and mirrors are placed to refiect the concentrated rays.

According to the invention the construction is simplified and adjustable lenses and, fixed and relatively non-adjustable mirrors are employed and it. consists in the particular combination and disposition of a single incandescent bulb, plano-convex lenses and fixed mirrors set at. such an angle in relation to the lenses so that the rays of light made convergent by the lenses are projected on beams consisting of divergent rays and either superimposed or crossing each other and a plain glass or aperture through which the beams of light pass.

lVith this construction it is possible to illuminate one or more areas with an intensive beam of light and also to use the ordinary divergent beam direct from the incandescent bulb for general illuminating purposes. I

Such lamps are therefore particularly applicable for use for shop windows, lofty buildings, streets, open spaces, and similar illumination purposes.

The invention will be described with reference to the accompanying drawings.

Fig. 1 is a vertical section through one form of lamp.

Fig. 2 is a plan of same from below.

Fig. 3 is a vertical section through another form of lamp on line 33, Fig. 4.

Fig. 4; is a plan of same from below.

The lamp shown in Figs. 1 and 2 is designed to project five divergent beams of light downwards either superimposed or I) crossing one another. Aroundthe incandescent bulb A four plane-convex lenses B, B 13 and B are fixed and a fifth plano convex lens 13 is fixed below the bulb. The incandescent bulb A is fitted in a holder a at the end of a screwed rod or tube C held in the casing by the two lock nuts 0 0 so that the height of the bulb can be adjusted. The casing D of the lamp is of rectangular shape in plan the sides (i being inclined at a suitable angle to the vertical. The bottom d of the casing is made of plain glass to allow the beams of light to pass through and it may be hinged to the casing if desired to give access to the bulb A from below. Each lens-B, B B, B is fitted on a bracket 6 which can slide longi 682,047, and in Great Britain February 5, 192a.

tudinally in relation to the top (1 of the casing, being clamped in position by the wing nut b. The bracket 5 is split along one side the two parts being clamped together by a screw. The lens can also be adjusted vertically by the screwed pin 6 by which it is affixed to the bracket 6, to suit different sizes .of bulb. The bottom lens B is carried by two downwardly depending studs 6 on which. it can be vertically adjusted. The mirrors E E E E are fixed on the sides of the casing at an angle to the vertical to project the beams of light from each through the plain glass so that thebeams will either be superimposed or so that the beams will cross one another according as. to whether it is desired to illuminate one or more areas. i

In the form of the invention shown in Figs. 3 and 4 lenses and mirrors are fitted to three sides of the bulb A, the bottom and one side being without to allow of an or dinary divergent beam direct from the bulb passing therethrough. The plano-convex lensesB, B and B are placed at three sides of the bulb A and fitted as described above with reference to Figs. 1 and 2. The casing D is fitted with fixed mirrors E, E

E on three sides and with plain glass on the fourth side and the bottom. Either the fourth side or the bottom or both may be hinged to give access to the bulb A. The mirrors E, E E ar fixed at an angle to project three beams of light which will cross one another at a point below and in front of the fourth side of the casing. An ordinary diverging beam direct from the bulb will also pass out through the fourth side and the bottom which will serve for ordinary illuminating purposes.

The mirrors E, E E E in Figs. 1 and 2 and the mirrors E, E E in Figs. 3 and at maybe ordinary mirrors or they may be made of moulded glass with raised portions e on the back, the glass being silvered over the raised portions. This construction of mirror will break up the rays of light and give a diffused light following however approximately the same path as the rays from an ordinary mirror. r

lVhat I claim asrnv invention and desire" to protect by Letters Patent is t;

In a lamp of the type referred to the combination with an incandescent bulb of a holder for same, means for adjusting the height of the holder, a casing, a plurality of convergent lenses disposed around the bulb, deflected in beams consisting of diffused holders for same, screws for aflixing the rays and a diffusing glass through which holders to the casing and allowing them to .the beams of light must pass. 10 be adjusted horizontally, aoplura lity of dif- Y In testimony whereof I have hereunto set fusing mirrors carried by the casing and my hand. fixed at such an angle to the lenses that the I rays of light passing through the lenses are J OHN ERNEST LORD.

Images