US1162139A - Reflector for incandescent lamps. - Google Patents

Description

M. CLAUSSEN & w. A. @QKAY. REFLECTOR ma INCANDESCENT L'AMPs.

APPLXCATION HLES MN 9. I913. 1,12 1%,

RENEWED SEPT. 18. 1913.

Patented NOV. 30, 19l5.

WKTNE SSES INVENTORS (f I, M g/(am, var/H066 Erica.

Mariam ctanssnn nnnwrnmair A; l fioKfiY, E. sen snaircrsco, sw eten, .Assrenons rc wrzann n no'rnro LAMP ooraranr, or SAN rnnnorsco, cam- FORNIA, a oonrona'rion or onmroanrn,

nnrnncron ron inonnnnscnnr names.

Application filed January 9, 1913, Serial leaf/ impet). Renewed September 18 1913. Serial No. 790,567,

To all whom it may concern:

Be it known that we, MARTIN CLAUSSEN and W iLLIAM A. McKAr, citizens of the United States and Canada, respectively, residing at San Francisco, in the county of f San Francisco and State o'lCalitornia, have invented new and useful Improvements in Reflectors for Incandescent Lamps, of which the following is a specification.

The object of the present invention isto provide an improved reflector for incandesstruction, and. easily removable and adjustable.

In the accompanying drawing, Figure '1 is a vertical section of our improved reflector upon an incandescent electric lamp, the lamp being shown in side elevation; and Fig. 2 is a perspective view of a clamp detached from the reflector. l i

Referring to the drawing, 1 indicates an electric incandescent lamp of the usual form. 2 indicates a concave reflecting sheet of metal or the like, the central portion of which is swaged outward, as shown at 3, to

form a recess, and is formed with a central aperture.

5 indicates two spring clamps, each of I which is formed with a central portion 6, of

form tofit close to the concave surface of the reflector, and two spring fingers 7 eX- tending therefrom and bent to form upper and lower portions 8, 9, adapted to contact with the globeof said lamp, and a short in tervening portion 10 spaced from said'globe *and extending inwardly from the reflector. vilhe lower ends of the fingers are bent outward, as shown at 11, for conveniently inserting the globe of the lamp between said fingers. The central portion 6 of each clamp is formed with a slit 12 formed by slitting longitudinally the blank from which said clamp is formed and then drawing the two 1 sides of the blank outward from one another,

said slit thus being of greatest width at the center and tapering to its ends.

, clamps are placed with their central portions within the reflector and crossing each other at right angles. F or the purpose of enabling them to cross one anothermore compactly, they are formed with short .central longitudinal depressions 13 of length slightly greater thanthe width of the cen I der side of the lowermost clamp. cent electric lamps, of cheap andsiniple con- SODS.

These tral portion of the 'clanip,-the depression one clamp being in the under or concave side, andof the other in the upper or convex side of the central port on of the clamp. The stem of a screw M is then passed through the centers of the'expanded slits and through the hole in the reflector, and on the outer end of said screw outside said retiector is screwed a nut 15 so as to draw the head 16 of the screw tightly against the una would probably be to break said teat and destroy the lamp, The shape of the spring clamp 5 prevents such contact for two rea- The intermediate portions 10 cause the upper portionsti to be spaced a consider able distance from the outer end of the lamp when in position, so that it is not possible for said teat to come in contact with said upper portions 6. Again, while the lowerparts of the lower portions Elare concave, so as to-fit fclosely around the hemispherical portion of the lamp, the uppen-parts-of said lower portions 8 extend-almost in a straight line, so that the teat of the lamp can only come in contact withsaid spring clamp, if the reflector be turned through more than half a right angle. But, before it has been turnedfrom one side to that extent, the end ll of the spring finger onthe opposite side,

engaging the lower conical portion of the.

lamp, will have to be pressed outward to such an extent, that the upper portion 6 of the clamp will be pressed against the inner surface of the reflector 2, and, when this is' the case, much greater resistance will be ofiered'to the turning of the reflector-in the direct-ion indicated, since the springclamp is then bent, not about the center of the do pression l3, but aboutthe juncture of the two portions 8 and 10. As the reflector is still further moved in the direction indicated, this resistance increases, until it is practically impossible to move the reflector in that direction so far that the teat of the lamp comes into. contact witha spring clamp.

The advanta es of the reflector are its simplicity, cheapness, and the. ease and Specification of Letters Patent.v Patgntgd Ngv, 3Q 1915 gig rapidity with which it is removable and adjustableysiuce the clamps hold the reflector upon the incandescentgiobe by the pressure thereon of the four spring fingers at whatever anglethe reflector is placed relatively to the lamp.

1. llieans for-supporting a reflector on an incandescent electric lamp comprising clamps crossing one another, each haring a centrally apertured portion,- and spring fingersextending therefrom, and means, passing through said apertured portions, tor

seeming said clamps to said reflector.

Means for supporting a reflector on an inczindescent electric lamp comprising clamps having slitted portions crossing one another, and spring" fingers extending on opposite sides of slitted portions and means messes passing through said slitted, portions for 881- curing said clamps to said reflector.

. 3. Means for supporting a reflector on an incandescent electric lamp, clamps having centrally recessed slitted portions crossing one another, and spring fingers extending on opposite sides of. said slltted portions, anda screw passed through said slit/zed portions and said apertures for securing said clamps to said reflector.

In testimony whereof We havehereunto comprising setour hands in the presence of two sub- 7

Images