US 394386 A
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Description (OCR text may contain errors)
(No Model.) 2 Sheets-Sheet 1.
T. G,- H. NICHOLSON.
TABLET 0R PLATE FOR DISPLAYING LUMINOUS FIGURES.
No. 394,386. Patented Dec. 11, 1888.
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(No Model.) 2 Sheets.Sheet 2. I T. G. H; NICHOLSON.
TABLET 0R PLATE FOR DISPLAYING LUMINOUS FIGURES. No. 394,386. Patented Dec. 11, 1888.
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UNITED STATES PATENT ()EEICE.
THEOPHILUS G. H. NICHOLSON, LIVERPOOL, (OUNTY OF LAYLASTER, ENGLAND.
TABLET OR PLATE FOR DISPLAYING LUMINOUS FIGURES.
SPECIFICATION forming part of Letters Patent No. 3943386, dated December 11, 1888.
Application filed May 15, 1888- Serial No. 274,005. (No model.) Patented in England January 31, 1888, No. 1,422.
To all whom it may concern.-
Be it known that I, THEOPHILUS GEORGE HUSBAND NICHOLSON, M. R. C. 8., &c., dental surgeon, a subject of the Queen of Great Britain, and a resident at Liverpool, in the county of Lancaster, in the Kingdom of England, have invented certain new and useful Improvements in or relating to Tablets or Plates for Displaying Luminous Figures, Characters, or Other Signs, (for which I have obtained a patent in England, No. 1,422, of January 31,1888,) of which the following is a specification.
This invention relates to improvements in tablets or plates which will display the figures, characters, or other signs thereon both in daylight and in the dark.
The immediate object of the improvements is to provide a luminous number or name tablet which shall be more durable and effective than any hitherto known to me. The luminosity is produced by any suitable luminous paint or paste, preferably of a light color, so that it may be readily visible in daylight.
The invention may be best described by reference to the accompanying drawings, which represent it as it may be applied to numbertablets or name-plates for street-doors.
Figure l is an elevation of a numbertablet. Fig. 2 is a transverse section of same on line a r, Fig. 1; and Fig. 3 a similar section on line y y, Fig. 1. Fig. 4 is an elevation of nameplate; and Fig. 5 a transverse section of same on line 2' 2, Fig. 4.
In the drawings, A A are the figures, characters, or devices, which may be either plain or ornamented to any desired extent. These are made of any suitable material, preferably of lead or some easily-worked composition. They are secured to a back supporting-plate, B, in any convenient manner, being raised considerably above the surface thereof, but preferablynot to a greater distance than in an ordinary door-plate.
The plate B may be of metal, as in Figs. 1 to 3, or of wood, as in Figs. -land 5, or of any other suitable material or composition. \Vhen the supporting-plate is of metal, the letters,
characters, &c., are by preference secured thereto by one or more rivets, a, formed in one with the parts A and passing for a short distance through holes in the said plate. hen
the supporting-plate is of wood or similar material, the letters, characters, &c., are preferably secured to the said plate by nails or screws a, or their equivalent, as in Fig.
E is a coating of luminous paint or similar material, which is laid over the front surface of the plate B. The letters, characters, &c., are then pressed against the paint and riveted or otherwise secured to the plate; or the letters, &c., may be secured to the plate first, and the luminous paint afterward laid over the visible portions of the said plate. This latter method is not so good, however, as it occupies more time and does not produce such a sharp clean edge between the letters and the luminous coating.
The parts A are covered by a plate, C, of glass or other transparent material, which is let into a frame, D, preferably of metal, though it may be of wood, as in Figs. l and 5. The glass is placed a short distance from the parts A, and is retained within the frame D by cement or by springs or clips (1, Figs. 1 to 3, let into a slot in the frame and turned over the glass, or by a groove, as in Fig. 5, or by other suitable means, so that it cannot be pressed against the parts A. The frame D preferably incloses the plate B; but when the latter is formed of a thin sheet of metal, as in Figs. 1 to 3, it is desirable to provide it with lugs b l), which extend outward to the edge of the frame. The frame fits over these lugs, one of them, b, being preferably sprung endwise into a shallow dovetailed recess in the frame, and the other, 1), being simply dropped into a corresponding recess therein. The recesses l) and b are of such a depth that the frame projects slightly beyond the rear surface of the plate, thus preventing the latter from sticking to the wood-work 0r backing E. By this means the removal of the tablet is facilitated and it is less liable to be injured during such removal.
The frame I) is secured to the plate B or to the backing F by screws G or their equivalent. In the case of a plate, such as shown in Figs. 1 to 3, the screws pass in'efcrably through the lugs b and b.
The glass plate 0 protects the luminous coating from dust and rain and from mischievous mutilation, and thus it is enabled to retain its freshness and luminosity for a greater length of time than would otherwise be the case. A sign constructed as herein described needs little or no cleaning or polishing, as is the case with the usual class of signs or tablets.
My invention is also applicable to street name-plates, shop or office name-plates, hotclsigns, &c.
I claim as my invention- 1. The combination, in a sign-plate, of a supporting-plate having its front face covered with a luminous pigment, characters in relief thereon, and a transparent plate for protecting the face of said supporting-plate, substantially as described.
2. The combination, in a sign-plate, of a supporting-plate covered With a luminous pigment, characters in relief on said luminous surface, and a glass plate for protecting said characters arranged at a distance from the surface of said characters, whereby injury to subscribing Witnesses.
T. G. H. NICHOLSON. \Vitn esses:
M. P. THOMPSON, GEo. C. DYMOND.