US73355A - William marot marshall - Google Patents

Description

r y @uitrit tatra @anni @Ihre WILLIAM MAROT MARSHALL, OF PHILADELPHIA, PENNSYLVANIA.

Letters Patent No. 73,355, dated January 14, 1868.

IMPROVEMENT IN REILBGTORS.

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TOAIIL WHOM IT MAY CONCERN:

Be it knownlthat I, WILLIAM MAROT MARSHALL, of Philadelphia, in thcicounty of Philadelphia, in the State of Pennsylvania, have invented a new and useful Improvement; in Glass Rclectors; and I do hereby declare that the following is a full, clcar,'and exact description thereof, reference being had to the accompanying drawings, and to the letters of referenceA marked thereon, making a part of this specification, in which- Figurel represents, in perspectiveJ one side of an oblong store-window reflector, properly curved.

Figure 2 represents, in perspective, twosections, joined together, of a.l parabola or a hyperbole reflector, for locomotives and other purposes.

Figure' represents a transverse section of fig. 1.

Similar letters of reference denote like parts'.

The nature of my invention consists in the construction of reflectors-in tho whole, or in'seetions to be joined together, when made of different plates of relecting glass, properly united at their edges, and supported either in plane or in curve by wire-frame work in front and back, or by wire-frame work in front, and by pastet board, wood, or thin metal sheet, or other suitable substance, at the back.

" To enable others skilled in the art to make and usemy invention, I will proceed to describe my method otconstruction.

Such rellectors as are used for lighting up store-windows, churches, halls, docks, ferries, depots, &c., I make asV follows: I' provide for theground or back, (see B, fig. 1,) a suitable sheet of pastcboard, wood,.or `metal, and eut it into the shape necessary for the purpose of making a section of the reileetor, either for the sides or ends. Upon this I lay lengthways, in successive rows, numerous strips of glass plate-,made reflecting by having pure silver precipitated or. otherwise attached on the back, (see A A A, iig. 1,) and properly cut to it. At suitable places (sec F F F) in thejoints of these plates, I att-ach to the back, I3, small tags, or bits of'thin metal or wire, which stand up, with two or more prongs, between the plates A A, and the ends of these prongs are bent over each way, so as to firmly hold the glass plates in place. I then make a suitably strong metal or wire frame, (see C C, ig.1,) and adapt it in shape 4to the edges of the hack, D. '.Io` this frame, at the points EE I attach the ends of small hat or round metal wires', (see D D D,) which are first properly bent, to suit the curro to he given to the reflector. This wholeframework is then laid over the glass plates, and firmly attached, at the wires C C, to the edges ofthe back, B. When a sufficient number of t-hcsc sections are thus made, they v may be attached together by the ends, thus forming a complete reflector, of any length or shape required.

Such reflectors as are used for head-lights of locomotives, or similar purposes, I make as follows: I cutout the base or back, B, (see fig. 2,) in a long angular shape, so as to forma section of a. parabola-or a hyperbola. I then cut the silvcred-glass `plates into strips, of suitable size and shape, which I lay on to the ground or' back, B, and fasten to it by small bits of thinmetal, I'I II H, which, being a part of the back, D, or attached to it, t are turned over the ends'of the glass plates, thus holding-them firmly in place. When a sufficient number of these sections are complete, they may be joined together at the edges, thus forming a complete reflector.

The-advantages of my improvement consist, (by means of the wire-frame work in front of the glass, and the little clasps F F or II H,) in preventing the pieces of'glass, when broken, from falling out, and in preventing them from falling out entire, as they so often do iu reflectors made of glass plates put on with cement. This fault of dropping the glasses from cemented reflectors has rendered them entirely unreliable and useless, so that their manufacture has almostentirely ceased.` Such reectors are the cheapest and most eiftzctiverellcctors known, if they can be made to hold together,- and resist the action of the weather, or the action of motion,

` as in a. locomotive, which I have eifectually attained in my improvement.

I am aware that reflectors have been made of numerous bits or strips of glass or silvcred glass, which I do not claim as my invention, as it is old.

What I do claim as my invention, and desire to secure by Letters Patent, is-

1. The flexible base, B, of pasteboard, papier-mache, wood, or sheet metal, in combination with the silvered strips of glass, A A,the metal frame C C, and the curved-wire mesh-work Dy D D, and the metal clasps F E F andH H H, substantially as described.

2. The Wire frame C C, the curved-wire mesh-work D D D, and the metal clasps F F F, in combination with the glass plates A A A, and the base, B, when arranged together so as to form a reflector or scction of a reflector, substantially as described, and for the purpose set forth.

'x WM. IVI. MARSHALL.

Witnesses:

J. B. ALEXANDER,

M. H. COLLINS;

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