US824781A - Blackboard. - Google Patents

Description

wall, to which the boar one-sixteent the construction, combination, and arranpe- UNITED STATES PATENT OFFICE.

Specification of Letters Patent.

Patented July 3, 1906.

Application filed December 26,1205. Serial No. 293,192.

To all whom it nuty concern.-

Be it known that I, CHARLES Fnrcnn, a citizen of the United States, residing at Aurora, in the county of Kane and State of Illinois, have invented certain new and useful Improvements in Blackboards, of which the following is a full, clear, and exact specification.

This invention relates to improvements in blackboards; and the object of the same is to provide an improved board of this character so constructed as to deaden the sound caused by the crayons when writing thereon.

A further object is to produce an improved board Which will be fireproof in construction; consistent with the supporting-Walls.

A further object is to construct an improved flexible metallic blackboard which may be rolled for the purpose of shipping, &c.

further object 1s to construct an improved board of this character which may be readily secured to a supporting-wall Without the use of nails, screws, &c., thereby dispensing With the necessity of perforating the same, and also to avoid the use of Wooden molding; and a still further object is to roduce an improved board of this type w 'ch Will be simple and durable in construction, efficient, and cheap to manufacture.

With a View to the attainment of these ends and the accomplishment of other new and useful objects, as will appear, the invention consists in certain features of novelty in ment of the arts, as hereinafter more in 1y described and claimed and shown in the accompanying drawings, illustrating an example of the invention, in which-- Figure 1 is a perspective view of a portion of the board constructed in accordance with the principles of this invention, with arts broken awa Fig. 2 is a longitudina section of the oard, showing the same as secured to a supporting-Wall.

Referring more particularly to the drawings, the numeral 1 dBSIfHHbBS a supporting is secured.

The board proper consists of a body portion 2, which is constructed of any desired flexible metal, referably sheet-steel, of about i1 of arrmch thick. The outer face of this metalbody isjcoated withiany desired paint compound 3 suitable to produce a Writingsurface. The rear face is referably coated with any suitable materia such as shellac or the like 4, and 5 desi ates a sheet of non-resonant materialsuc as asbestos, pa er, or any other non-sound condoctor-0 the desired thickness, preferably one thirty-second of an inch, which is secured to this face and by means of which the board is held in position against the wall 1 with any suitable glue 6 between the face of the paper and the wall 1. This backing serves the double function of deadenin the sound caused by Writing on the face 0 the board and also as a means b which the board may be secured to the wall, as the plate 2 could not be glued direct to the Wall with any de gree of certainty without providin additional securing means. The flexibility of the metal will permit the board to be readily rolled for the purpose of shipping or storing the same.

It is to be understood that it is not desired to be limited to the exact sizes, materials, and arrangement of the several parts, as numerous changes may be made without departing from the spirit of the invention.

What is claimed as new, and desired to be secured by Letters Patent, is-

1. In combination, a blackboard comprising a flexibie metallic body having a writingsurface, said board being adapted to be secured to a support, and a fibrous material disposed between the back of the board and the support.

2. A blackboard comprisin a metallic body, a writing-surface forms on one face thereof and adapted to be secured to a support, and a sheet of fibrous material disposed etween the rear face of the body and the support.

3. A blackboard comprising a sheet-metal body, a Writing-surface formed on one face thereof, a sheet of paper secured to the rear face of the body, and means for securing the paper to a supporting-wall to hold the board in position.

4. In combination, a blackboard comprising a sheet-metal body having a coatin on one face thereof to reduce a writing-s ace, the rear face of the ody being provided with a coating, and a sheet of fibrous material secured to the rear coated face, said board being adapted to be secured to a support by gluing the exposed face of the fibrous material name to this specification, in the presence of thereto. two subscribing witnesses, this 13th day of 5. A blackboard comprising a flexible me- December, A. D. 1905. tallic body provided with a writing-surface, CHARLES FRICKE. 5 and a fibrous material secured to the back Witnesses:

thereof. FRANK G. PLAIN,

In testimony whereof I have signed my KARL J. F RIOKE.

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