US450092A - Slate attachment - Google Patents

Description

UNITED STATES MAUD IVYMAN, OF OAKLAND, CALIFORNIA.

PATENT OFFICE.

sLATE ATT'AcH |v| ENT.

SPECIFICATION forming part Of Letters Patent NO. 450,092, dated April 7, 1891. y

Application filed September 13, 1890. Serial No. 364,921. (No model.)

.To all wtont I? may concern:

Beit known that I, MAUD VYMAN, of Oakland, in the county of Alameda and State of California, have invented a new and useful Improvement in Slate Attachments, of which the following is a specification.

My invention is an improvement in the class of educational appliances or apparatus in which a series of endless bands or tapes bearing numbers or letters of the alphabet are arranged on rollers or shafts within a box having an opening through which a particular portion of the said bands may be seen.

My invention is embodied in the construction and combination of parts hereinafter described and claimed, whereby I provide an improved apparatus for use of pupils in learning to write or draw such letters or characters as may be applied to the endless bands. I employ a slate and arrange the lettered bands to run beneath it and through slots in its frame and also over a portion of the latter, so that any particular characters on t-he belts may be brought prominently to view; and I also provide spring-clamps, which press the bands upon the slotted frame, through and over which they pass, so that by manipulating a particular clamp any individual band may be-readily released when it is desired to move it along for the purpose of bringing another letter or other character to view.

ln the accompanying drawings, Figure 1 is a plan View of my improved apparatus, part being broken out. Figs. 2 and 3 are' crosssections on lines 2 2 and 3 3, respectively, of Fig. 1.

A slate 10 is fixed in the upper side of a box 11, and within the latter at its upperand lower sides are located two parallel shafts 12 and 12. A series of endless bands 16 run on these shafts, and the latter are provided with a series of circumferential flanges 13 to keep the bands separated from each other. It will be understood that the flanges of one shaft are directly opposite those of the other shaft. Each shaft has a pulley 14, and an endless cord 15 runs on the same, it being wound one or more times around each pulley to prevent slipping.

A disk 1S is fixed on one end of the upper shaft 12 and projects above the top surface of the box v11, so that it is easily visible and also conveniently accessible. By applying a finger to the said disk 18 the shaft 12 may be rotated, and through the niediumof the cord 15 the other shaft is rotated also, whereby the endless bands 16 are moved correspondingly. These bands are provided with letters ofthe alphabet or other characters, which become successively visible as the bands pass over the bar 17, and may therefore be conveniently copied on the slate 10.

The bands are held normally immovable by means of spring-clamps 20, attached to the bar 19 at the upper side of the box 11. By pressing a particular clamp backward the band on which it bears is released, so that it may be moved along to bring another characterinto view. The characters to be copied are always prominently exposed to the eye of the pupil, and the bands may be easily moved to change them as desired. The slate forms one side of the box, which incloses and protects the moving parts save the spring-clamps.

What I claim is-.

The combination, with the box l1, the slate 1Q, its upper frame-bar 17, having diagonal slots 17, and the shafts 12 and 12, disk 1S, cord, and pulleys, of the series of endless letter-bearingbands,and spring-clamps mounted on the upper portion of the frame and pressing the bands that pass through the said slots upon the adjacent upper portion of the framebar, as shown and described.

MAUD VYMAN.

Illitnesses:

A. W. KEITH, L. ABBOTT.

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