US1937980A - Metal lining - Google Patents

Description

Dec. 5, 1933. J RlTTER 1,937,980

METAL LINING Filed April 22, 1932 mnmn "in" j? nb'l 1 .5 )NVENTQ WITNESSES J0 mfiz 6/ BY hym M 6 ATTORNEY Patented Dec. 5,1933

UNITED STATES PATENT OFFICE 3 Claims.

An object of the invention is to provide a sheet metal panel for telephone booths and for other purposes which has an embossed surface which renders it diiiicult to deface or mutilate the metal 5 panel by writing, drawing, or tracing thereon.

Another object of the invention is to emboss the metal panel with irregularly shaped protuberances which are staggered, there being no curved or straight lines separating the protuberances and there being approximately twenty distinct protuberances to the square inch.

A further object of the invention is to provide a sheet metal panel or lining having sound-proof characteristics.

Additional objects of the invention will appear in the following specification in which the preferred form of the invention is described.

In the drawing similar reference characters refer to similar parts in the several views, of which Figure 1 is a sectional view of a telephone booth provided with the metal panels,

Figure 2 is an enlarged fragmentary view illustrating the face of one of the panels, and

Figure 8 is a sectional View on the line 33 of Figure 2. I

It is customary to use metal panels or linings in telephone booths and in other public places, but the metal panels or linings which are now employed'are defaced and damaged by persons writing, drawing and tracing thereon. This makes it necessary for the telephone company or other interested parties to keep men employed to renovate the metal panels, which entails a very considerable expense. The improved metal panel, which is the subject matter of this application, overcomes this difficulty, for it has been found, after considerable research and many experiments, that where the metal panel is embossed with many irregular staggered protuberances which are separated by irregular lines it is exceedingly difiicult to write or draw on the metal panel and that anyone attempting to do so soon becomes discouraged.

By referring to the drawing it will be seen that the metal panel is shown in connectionfwith its use as a lining for telephone booths. However, it will be understood that the metal panel, which is the subject matter of this application, may be used for any desired purpose.

The metal panel 5, when used in a telephone booth, may be secured to the inner side of the telephone booth by any suitable means and it will lie closely to the walls 6 of the telephone booth. The drawing shows the metal panel 5 with a molding 7, but it will be understood that this molding 7 may be omitted, or that any other desired molding may be employed.

The metal panel 5 is embossed with protuberances or bulges 8 which are irregular in shape and size and which are staggered, as best shown These protuberances 8, with which the ther render difiicult writing on the panel, certain ones of the bulges project out farther than others from the mean plane of the panel (Fig. 3). These bulges (see those near the top of the figure) are struck on slightly different arcs, their side being thereby varied.

Since some of the bulges are of slightly varying size it follows that they are made up of a succession of sweeps of irregular height and length, and since this occurs in every cross-sectional direction of the panel it becomes apparent that the surface of the panel is interrupted sufiiciently well to prevent legible writing of any use ful size. I

With this arrangement of the small protuberances 8 it is practically impossible for any one to write or draw on the metal panel 5, for any pressure on a pencil at the protuberances will direct the pencil in unexpected directions, which will make it impossible to direct the pencil in any definite or desired manner. It will also be seen that the protuberances 8 provide air spaces 9 at the rear surface of the metal panel 5, these air spaces 9 being irregular inshape and serving to give the metal panel 5 sound-proof characteristics.

What is claimed is:

1. A lining for booths comprising a panel embossed with rounded dome-shaped bulges of which certain ones project out farther than others from the mean plane of the panel, the various bulgesbeing struck on different arcs to vary the size of the bulges, said bulges being closely formed and of irregular contour.

2. A lining for booths comprising a panel em bossed with rounded dome-shaped bulges of closely connected irregular contour, said bulges defining a succession of sweeps of irregular height and length in any cross-sectional direction of the panel.

3. A booth comprising a wall, a sound-proofing panel on one side of the wall, said panel being embossed with dome-shaped bulges bowing out from said side, said dome-shaped bulges comprising sweeps of irregular height and length in any cross-sectional direction of the panel to provide irregular air spaces.

JOHN BITTER.

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