US354760A

US354760A - adams

Info

Publication number: US354760A
Authority: US
Publication date: 1886-12-21
Anticipated expiration: 1903-12-21

Description

(No Model.)

J; S. ADAMS.

REFLECTOR. No. 354,760. Patented De0r21, 1886.

N PEYERS, mwumm mr, Washington. n, c.

, UNITED STATES T PATENT Fries.

JOHN S. ADAMS, OF INDIANAPOLIS, INDIANA, ASSIGNOR TO THE JENNEY .ELEGTRIG COMPANY, OF SAME PLACE.

REFLECTO R.

SPECIFICATION forming part of Letters Patent No. 354,760, dated December 21, 1886.

(No model.)

To all whom, it may concern:

Be it known that I, JOHN S. ADAMS, of the city of Indianapolis, county of Marion, and State of Indiana, have invented certain new 3 and useful Improvements in Reflectors, of

which the following is a specification;

The principal object of my said invention is to produce a reflector for electric lamps which will radiate the light substantially equally at all times notwithstanding the varying positions of the arc, and the conse quently varying relations of the are to the reflector. This'object is accomplished by forming the surfaces of the various portions of the reflector convex or on curvilinear lines, so that the rays oflight from the arc will be always at right angles with some portion of the surface of these reflector portions, notwithstanding that the distance between the arc and the reflector, as a whole, may vary. It further consists in certain details of construction whereby this object may be effectually carried out, and whereby the several portions of the reflector may be adjusted as desired, all as will be hereinafter more particularly described and claimed.

Referring to the accompanying drawings, which are made a part hereof, and on which similar letters of reference indicate similar parts, Figure 1 is a side elevation of an electric lamp and its supporting frame-work with my improved reflectorattached; Fig. 2, a top or plan view thereof Fig. 3, a central vertical section through one of the reflector portions, on the dotted lines 3 3in Fig. 2, the dotted lines illustrating the variations in angles of incidence and reflection consequent upon the varying position of the light; Fig. 4, a detail sectional view longitudinally of the framecoupling, on the dotted line 4 tin Fig. 5; Fig. 5, a similar view on the dotted line 5 5 in Fig. 4; Fig. 6, a detail sectional view through the device by which the reflector is secured to the frame carrying the lamp, on the dotted line 6 6 in Fig. 7; and Fig. 7, a view of said device as seen from the dotted line 7 7 in Fig. 6.

In said drawings, the portions marked A represent the frame, which carries an electric lamp when mounted in position for use, as on the tower or mast; B, acircular rod forming the main portion ofthe reflcctor-frame; O, ,the several reflector-sections; D, the device by which the reflector as a whole is secured to the frame,

and E an electric-,arclamp secured in position in said frame-work in proper relation to the reflector.

The frameA and the lamp are or may be of any usual or desired construction and need no special description.

The rod B is a substantially circular rod, and is secured together by a two-part coupling, 1) b secured together by a single screw, 12, passing centrally through it, as shown most plainly in Fig. 4. By this means an effective and 6 easily-operated coupling is provided, which can be loosened, and the ends of the rod thus permitted to be moved apart and the reflectorsections taken off at pleasure.

The reflector-sections O are substantially in the form of sectors of circles, with the inner and outer ends squared, andare formed with acurvilinear lower surface, which may be either of glass or polished metal. The backs are preferably of sheet metal, and to them are secured the eyes 0, which pass over the rod B, and each eye has a set-screw, .0, by which the section carried thereby may be secured rigidly in position on said rod. As will be readily understood, by making the reflecting-surfaces 8o convex, some portion of said surfaces will always face the light in such a position as to reflect said light to a given point, and thus maintain an even volume of light at said given point. 8 5

The device D consists of two branches, in one of which is an eye, D, which passes over the rod B, to which rod it is firmly secured by the set-screw d. The other branch carries a hook, D which hooks around an upright side rod of the frame A, and the whole device, carrying the reflector frame and sections, is se- 1 cured in position upon said side rod by a thumb-screw, D

I am aware that reflectors of a convex form 5 have been mounted in the top of street-lamps having another reflector in the bottom, and I am also aware that aconvexreflector has been mounted one above and one under an electric light for throwing the rays against radiators :00

arranged around said light, and therefore do not claim a convex reflector, broadly, but expressly limit myself to the construction herein shown, and set forth in the claims.

Having thus fully described my said invention, whatl claim as new, and desire to secure by Letters Patent, is

1. The combination of an electric-arc light and a reflector arranged around and upon a higher plane than said light, the reflecting-surface whereof is formed bowed or convex from top to bottom, and being arranged at such an angle that some portion of each section shall face the light directly-at all times during the combustion of the carbons, substantially as set forth. 7

2. The combination, with an electric-lamp frame, of the circular frame B,supported from said lamp-frame, and the several sections 0,

'mounted on said frame B and formed with bowed or convex-shaped faces, substantially as set forth.

3. The combination, with the frame of an electric lamp, of the circular frame B, several sections, 0, having eyes 0 and set-screws c, and a device by which said circular framemay be connected to and supported by the framework. v

4. The combination, with the lamp-frame, of the frame B, supporting the reflector-sections, and a coupling for securing the ends of said frame Btogether, consisting of the parts b b and connecting-screw b, substantially as set forth.

5. In a reflector for electric lamps, a frame for supporting the reflector-sections, consisting of a circular rod secured together at its ends by the coupling b b b, substantially as set forth.

6. The combination, with the frame of an electric lamp, of the circular frame B, supporting the reflector-sections, supports D, secured to said frame by eyes D, and hooked portions D, with thumb-screws D securing the same to said lamp-frame, all substantially as set forth.

7. A reflector for electric lights, consisting of a series of convex-faced sections mounted on a circular frame around and upon a higher plane than said light, at such an angle that some portion of each section shall directly face said light during all stages of the combustion of the carbons, substantially as described, and for the purposes specified.

In witness whereof I have hereunto set my hand and seal,at Indianapolis, Indiana, this 10th day of May, A. D. 1886.

JOHN S. ADAMS.