|Publication number||US871915 A|
|Publication date||Nov 26, 1907|
|Filing date||Jan 18, 1906|
|Priority date||Jan 18, 1906|
|Publication number||US 871915 A, US 871915A, US-A-871915, US871915 A, US871915A|
|Inventors||Augustus D Curtis|
|Original Assignee||Augustus D Curtis|
|Export Citation||BiBTeX, EndNote, RefMan|
|Referenced by (3), Classifications (1)|
|External Links: USPTO, USPTO Assignment, Espacenet|
PATENTED NOV. 26, 1907. A. D. CURTIS.
APPLICATION FILED mums, 1906.
0.1 m. x. W
AUGUSTUS D. CURTIS, OF CHICAGO, ILLINOIS.
Specification of Letters Patent.
Patented Nov. 26, 1907.
Application filed January 18, 1906. Serial No. 296.599.
To all whom it may concern:
Be it known that I, AUGUSTUS D. CURTIs,
citizen of theUnited States, residing at Chicago, in the county of Cook and State of Illinois,- have invented certain new and useful Improvements in Reflectors, of which the following is a specification. This invention relates to improvements in the construction. of light reflectors especially adapted for use in connection with incandescent electric lamps.
An important object attained through the improvements which form the subject matter of this application for patent is the diffusion of the rays of light so that there are no shadows produced or thrown on the obi'ects illumined by the combined effect of the amps and the reflector.
A further object is to produce a reflector having uni ue ornamental effects, there being insuch evices a certain degree of utility in the design or conformation, inasmuch as many of this class ofreflectors are used in displa 'ng goods in store windows and it is deslralile that the reflector should contribute to and harmonize with the artistic or ornaniental eflects producedby the window dis- P y In' the accompanying drawing I have shown my invention as a reflector in the general sha e in front elevation or around .its
edges 0 a parallelogram, and in cross-section, in the form ofa hood in which the u :per side overhangs the lower ed e, and t e ack is concave conformin to t care of a circle. I do not howeverwish to be understood as limiting myself herein to such general form as the essential features of my invention are applicable to many different shapes ofreflectors.
In the accompanying drawing; Figure 1 is a front elevational view of my invention in operative osition and in combination with two incan escent electric lamps; Fi 2 is an inside plan viewof the reflector wit out the lamps, and Fig. 3 is a cross-section onthe dotted line shown in Fig. 1, with the lamp V removed.
i able material which Referring. to the details of the drawing, A represents generally a reflector constructed in accordance with my invention of any suitmay have a olished refleeting surface or have applied thereto a substance having light reflecting qualities.
(1 is an opening to receive the lamp socket b which, is of any well known construction and has secured thereon incandescent lamps b which have the usual filaments b.
On each side of the opening a, the surface of the reflector has spots a a}, which are plain or flat and in making the reflectors these lain surfaces are so arranged that they will be directly behind the center of the rays of light from the filaments 6 From each of the spots 0, the inner surface of the reflector is formed with series of corrugations (Z ,'a which radiate on curved lines from the spots as centers and most of which extend to the periphery of the reflector.
It will be apparent that as the rays of light from the lamp filaments are pro ected radially on straight lines that such rays will intersectlthe rays reflected from the corrugated surfaces of the reflector, the eflect of which is to break upor difiuse the rays which are r0- jected from the latter. The increase in rilliancy due to the multiplicity of reflectlng concavo-convex surfaces is well known in this art, and it is apparent that I'get the benefit of such results in this invention.
This reflector Will be so mounted or hung that the rays of light will be thrown directly upon the objects to be illumined, the an le and general contour of its walls being esigned to contribute to the reflective power of the corrugated surfaces.
Having thus described my invention, I claim p 1. A reflector consisting of a hood-like structure of suitable material, having a central opening to receive a lam attachment, and having the reflecting surace on opposite sides of said opening formed into series of corrugations, the corrugations of each series radiating on curved and slightly diverging lines from a common center.
2 A light-reflector consisting of a hoodlike structure, rectangular, in outline, and
having its reflecting 'surface formed with one or more substantially flat spots and with corrugations radiating from said spots on curved and diverging lines extending to the margins of the structure, the depth of said corrugations being substantially the same throughout their length. 1
In testimony whereof I aflix my signature in presence of two witnesses.
AUGUSTUS D. CURTIS.
Witnesses F. BENJAMIN, WM. B. Moon.
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