US1957797A - Reflector - Google Patents

Description

y 1934. v L. OESTNAES El AL 97 REFLECTOR Original Filed Aug. 30. 1929 gwuwnkow Patented May 8, 1934 TATES REFLECTOR Original application August 30, 1929, Serial No. 389,355. Divided and this application August 29, 1931, Serial No. 558,252

1 Claim.

Our invention relates to light reflectors, more particularly to reflectors of triple type wherein the reflecting surfaces are arranged in approximately right angular relation to each other.

The general object of the invention is to provide a reflector of the type indicated, the front end or side of which is of circular shape. Although we have illustrated our invention as embodied in a hollow sheet metal reflector, it is to be understood that it may be embodied in a reflector of triple type of solid construction, such as glass, wherein the front side or end is of circular shape.

It also is an object of our invention to provide a reflector wherein the outer edge portions of the reflecting surfaces are of curved shape and wherein the portions of the structure intermediate the adjoining edges of the said reflecting surfaces are of circular shape and extend outwardly or toward the front of the reflector in directions substantially parallel with the axis thereof.

Other objects and advantages of the invention will be pointed out in the detailed description thereof which follows or will be apparent from such description.

In order that the invention may be readily understood and its practical advantages fully appreciated, reference should be had to the accompanying drawing wherein we have illustrated a reflector structure which embodies our invention.

In the drawing:

Fig. 1 is a View in front elevation of a reflector embodying the invention; and

Fig. 2 is a view in longitudinal section taken on the line 22 of Fig. 1.

In the drawing I have shown a reflector of triple type constructed of sheet metal. Specifically, the invention is shown as embodied in a central triple reflector. As previously indicated, the reflector may be of the solid type and terminating at its front in a circular portion which preferably should be cylindrical.

The reflector consists of sheet metal and may be constructed in accordance with any known method which may be chosen by the maker thereof. It comprises three side portions, 1, 2 and 3, the inner surfaces of which are flat and are arranged in approximately right angular relation to each other. If desired the outer surfaces as Well as the inner surfaces of the sides 1, 2 and 3 may be light-reflecting. Preferably, the surfaces are rendered light-reflecting by the application of high pressure thereto, in any known manner. The outer or front edges of the sides 1, 2 and 3 shown by the line 4. in Fig. 2. The apical points of the curved edges indicated by the lines 4 of the inner surfaces of the sides 1, 2 and 3 preferably are located a short distance below the front edge of the reflector as is shown at 5 in Fig. 2, 0 although it may happen that the said apical points may be located approximately in the plane of the front edge of the said reflector or even further away from the edge than is shown in Fig. 2. However, in whatever plane the apical points of the curved edges of the inner light-reflecting surfaces of the sides 1, 2 and 3 may be located, the reflector should terminate at its front end in circular form, preferably approximately cylindrical.

The portions of the parts of the structure intermediate the edges of the adjoining sides 1, 2 and 3 merge into those portions of the reflector which are located in adjoining relation to the apical portions of the curved edges indicated at 4 and form therewith the front portion of the reflector of curved, preferably approximately cylindrical, shape.

The outer edge of the front end of the reflector is provided with a laterally extending circular or annular flange 6.

The presence of the curved, preferably cylindrical, front end portion of the reflector provides means whereby the same may be readily attached to a mounting or support which is necessary when the reflector is in practical use. The presence of the flange 6 which, as shown, is integral with the front curved portion of the reflector facilitates the mounting of the reflector upon a support and it also operates to increase the rigidity of the structure. Such increased rigidity decreases the likelihood of distortion of the reflector due to pressures or to blows to which it may be subjected. The presence of the curved, preferably cylindrical, portion at the front end of the reflector and the lateral flange thereon also facilitates the fastening of a cover plate to the front of the reflector to close the same, which plate may consist of any suitable transparent material, such as glass, or it may consist of partially transparent or translucent material. The cover fol the front open end of the reflector may also embody either a lens or a prism structure or a combination of both. The presence or absence of a cover for the open front end of the reflector does not in any way affect our invention which relates to the reflector per se as the same hereinbefore has been described.

It will be understood by those skilled in the and of the inner surfaces thereof are curved as art of reflectors of the character to which this invention relates that the removal of the corner portions of adjoining angularly related reflecting surfaces does not or need not reduce the field or cross-sectional area of the reflected light beam. In other words, the termination of the front portion of the reflector in curved, preferably cylindrical, form does not decrease the efiiciency of the same, practically, for commercial purposes.

Although we have shown the device of our invention as consisting of a hollow sheet metal reflector having a curved, preferably cylindrical, front portion it will be understood that a solid reflector of glass or equivalent material may be provided with its front end of curved, preferably cylindrical, shape in cross section whereby the mounting thereof upon a support may be facilitated.

The subject matter disclosed in this application is a division of the subject matter disclosed in our application filed August 30, 1929, Serial No. 389,355, for Letters Patent of the United States for improvements in reflectors and methods of making the same.

Having thus described our invention, what we claim and desire to secure by Letters Patent is:

A hollow sheet metal light reflector comprising a bottom Wall formed of three intersecting flat reflecting portions arranged at right angles with respect to each other and diverging outwardly toward the open end or" the reflector, a cylindrical side wall into which the outer edges of said reflecting portions merge, and an annular flange extending outwardly from the outer edge of said cylindrical side wall.

VICTOR L. OESTNAES. RICHARD W. LUCE.

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