US812192A - Locomotive-headlight. - Google Patents

Description

Um'ra sfraras PATENTT OFFICE.

EDGAR 'A. EIYWARDS, OF UINCIN'NATL OHO, ASSIGNOR, BY MESNE AS- SIGNMENTS, TO h'lETROPOl'iITAN T RUCT o): SAVINGSBANK, TRUSTEE,

A CORPORATION OF lLLlNOlS.

'LOCOMOTlVE-HEADLEGHT.

specification of Letters 1 atent.

``Patented Feb. 13, 1906.

Application filed November 25,1901. brial No. 83,535.

.lights, of which the following is a specificatron.

My invention relates to locoinotive-headlights and to that class of hea llights--such, for instance, as is illustrated in Samuel H. Harringtonfs Letters Patent, No. 495,938, dated April 18, 1893 `-in which a signal-light is projected upward from the hcadlight, so as to signal the approach of a train from a distance when the usual horizontal light could not, in conseque-nc'e of curvaturcs of the road and intervening objects, 'c., bc perceived'; and my invention consists in proviiding the casing of the headlight with two intersecting reflectors, one of which will throw certain light-rays upward and the other will throw certainlight-rays forward, as fully set forth' hereinafter and as illustrated in the accompanying drawings, in which- Figure 1 is a longitudinal section of a locomotive-headlight, illustrating my improvement; and Fig. 2 is a front view.

The casing Aof the headlight issuitably constructcd so as to provide an opening at the front, as well as one at the to the saidopenings being' covered by glass p ates a and Z), as shown. Within the'casing' is arranged a paraholoidal reflector C of the usual construction, and at the focus of this rcfiector is the flaine of the lamp, which maybe of any suitable character, but as shown is an arclainp, the rellector (J being so constructed as to throw the light-rays forward through the front oponiiue` 'v in a substantially horizontal direction. Within the casing A is arranged a second reficctor J', of the same shape as the rcfiector (J; hut it is so arranged as to have the same focus as the reflector C. To make this arrangement, it becomes necessary to cut away each of the refiectors so that they meet upon a plane 8 assing through the said focus, forming a imited opening between the interiors of the parabolas, the

shape of which sbest shown by the outline t in Fig. 2.

thrown upward through .the' ofiening at the top of the casing- There are t erefore within the casing A two similar reflectors, one throW-.

ing a portion ofthe light-rays forward and the other throwing a portion of the light-ra vs upward, eachreceiving its rays fromt e same lamp, which is arrange'd in a focus common to both. i

lt will be seen that when two refieotors of the Character descrihed idtersect each other there is hut a comparatively small ortion of The reflecto'r C' also' receives the; rays of light from the lamp B, and these`are each i'efiector cut away, so that a arge portion of each reflector will receive and project the light-rays 'through the oiposite o ening, while both reflectors are com same casxng and rotected from the weather med wit lin the and 'receive their ight from a common source;` i

Without limiting myself to the precise construction and arrangement of parts shown, I claiin as my inventionff 1. In a locoinotive-headlight, the combination of a casing open at both the front and' top, and two iiitersecting paraboloidal reflectors having a common focus and arrangefd one to rel'lcct the light from said focus forward and the other upward, substantially as set forth.

2. The combination with lthe lamp zof a locomotivc-headlight, of aparaboloidal refiector, the focus of which corresponds With the light of said lamp and arrang'edv to project' the light-rays forward, and a second paraboloi'dal refiector int'ersecting the first, having the same focus and arranged to project 'the lightrays ulpward, substantially as set/forth.

3. he combination with the lamp of a lcomotive-headlight, of a para'boloidal reflector, the focus of which corresponds with the` light of said lamp and arranged to project the light-rays forward, a second paraboloidal re-` flector intersectingthe first, having the same focus and arranged to project the light-rays upward, and a casing with end and top openings for the assage of the light-rays forward and upwar and' transparent coverins for said openings, substantially ns set `'fort' 4. The combination in a locomotve-head- 1 In testimoy 'Whe'reof` have slgned my light, 'of a casing with openlngs at the top and front, and ntersecting pambolodal reflectors having a common focus arranged to pro- 5 'ect light-rays forward and upward, and a.

amp arranged to produoe the fiame at said focus, substantially as set forth.

name to this specification in the presence of two subscrlblng wltnesses.

EDGAR A. EDWARDS.

Witnesses:

H. M. GILLMAN, Jr., W. CLARENOE DUVALL.

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