US 1691307 A
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Description (OCR text may contain errors)
Nov. 13, 1928. 1,691,307
E. SCHIMPFF HEADLIGHT REFLECTQR Filed April 23, 1926 2 Sheets-Sheet 1 Nov. 13, 1928. 1,691,307
E. SCHIMPFF HEADLIGHT REFLECTOR Filed April 23, 1926 2 Sheets-Sheet 2 Patented Nov. 13, 1928.
UNITED STATES PATENT OFFICE EUGENE SCHIMPFF, OF SCBANTGN, PENNSYLVANIA HEADLIGHT REFLECTOR.
Application filed April 23, 1926. Serial No. 104,009.]
This invention relates particularly to a reflector for use on automobile headlights,'
and aims to provide an improved reflector in which the illuminating efficiency of the beam will be maintained'to the fullest 6X- tent but in which objectionable glare will direction of the axis of the beam and tilted at an angle away from the central axis of the beam.
While I have disclosed a preferred embodiment for purposes of illustration it should be understood that various changes in the structure may be made without departing from the spirit and scope of the invention as hereinafter described and claimed.
In the drawings:
Fig. 1 is a front elevation of the reflector; Fig. 2 is a section on line 2-2 of Fig. 1;
Fig. 3 is a detail view taken along line 33 of Fig. 1;
Fig. i is a front elevation of a modification;
Fig. 5 is a section on line 55 of Fig. 4.
The reflector is of general parabolic shape and it will be clear from Figs. 1 and 2 that the upper half of the reflector is in the form of a true parabola. The rays oflight that cause the glare from a headlight-are these reflected from the lower half of the ordinary parabolic reflector. In order to eliminate the glare in the present invention the lower half of the reflector is formed into a series of steps flat in a direction circumferential 0f the reflector, but retaining their parabolic curve in the direction of the axis of the beam. The lower right-hand step 12 is disposed at an angle so that it slopes toward the right away from the center line and is connected by a riser 17 to the step 13.
Thisslep is also set at an angle so that it slopes away towardthe right and is connected by a riser 17 tostep 14. The steps 14, 15 and 16 are similarly disposed, except that the last step 1.6 merges into the para belie surface 10. The lower left-hand portion of therefiector is formed in the same manner as the right-hand portion ust described except that each step slopes toward the left.
As a result of having these flat steps slop ing. towards the right and left the rays which would ordinarily be thrown forward into the cyesof an approaching driver to produce glare are thrown sharply off to the side or upward in such a manner that they cannot cause annoyance to an approaching driver, while the short relatively perpendicular risers cannot produce any glare.
In the modification illustrated in Fig. 4 a
similar result is attained by providing the lower half of the reflcctorwith a series of radially extending ridges which follow the parabolic curve of the reflector. The top of each ridge l7 after extending a short distance is depressed as at 18 to form two branch ridges 19. By this construction the outer part of the lower half of the reflector is still further broken up and the dispersive of feet thereby increased.
I claim: 7 Y A short-focus headlight reflector having its upper half formed with a smooth parabolic surface, itslower half being formed with a olurality of relatively narrow steps, the steps eing fiat circun'iferentially cf'the reflector and extending outwardly from the center of the reflector, the upper edge of each step lying in a continuation of the parabola, the loweredge of each step being elevated above the continuation of the parabola. I
In testimony whereof I atiix my signature EUGE E seI-rrMrFr.