US540368A - James m - Google Patents

Description

(No Model.)

,J. M. TAYLOR. DUSTLESS REMOVABLE BLAGKBOARD TROUGH.

Patented June 4 AT-BENT. 'FFICE.

JAMES M. TAYLOR, HAMILTON, NEW YORK, ASSIGNOR OF ONE-HALF Ti) CHARLES H. THURBER, OF SAME PLACE.

DUSTLESS REMOVABLE BLACKBO ARD-TROUGH.

SPECIFICATION forming part Of Letters Patent NO. 540,368, dated June 4., 1895.

Application filed January 17, 1894:. $erial No. 497,125. (No model.)

To all whom it may concern.-

Be it known that I, JAMES M. TAYLOR, a citizen of the United States, residing at Hamilton, in the county of Madison and State of New York, have invented certain new and useful Improvements in Dustless Removable Blackboard-Troughs, of which the following is so full, clear, and exact a description as will enable those skilled inthe art to which my invention appertains to make and use the same, reference being had to the accompanying drawings, in which 7 Figure 1 is aperspective view of the invention. Fig. 2 is a transverse vertical section of the same.

The object of the invention is to provide a blackboard with a troughby the use of which the accumulations of dust and powdered chalk in the bottom of the trough will not have the effect of soiling the crayons and eraser, as heretofore. Another object of the invention is to provide means whereby the chalk may be collected in a receptacle by itself entirely dis:

tinct and separate from the crayons and eraser.

Another object of the invention is to provide means for removing the chalk which falls from the board without scattering it about the school room.

Another object of the invention is to provide means for the reception and accommodation of the chalk which falls from the board end of the crayons and of the erasers in such a manner as to keep the crayons and erasers away from the chalk.

In the accompanying drawings, A designates the blackboard proper which may be supported by a suitable frame B, which may be supported in turn on a table or stand, or which may be secured to the wall of the room.

' Below and in front of the board A are two engage automatically with a projection H on the bottom of the trough. The locking catch is provided with a suitable spring I and the projecting thumb piece J, for disengaging it when it is desired to remove the trough. At one end of trough a section of the bottom is removed and a cover K is provided for this opening. In the drawings is shown a sliding cover for this purpose. It is obvious how over, that this cover might be dispensed with without departing from the spirit of my invention, and the trough could be turned bottom side up and with a rap or two, the powdered chalk would fall out through the grating.

The exact form of locking catch need not be used as any suitable locking device for this purpose would do the work with equal facility. The molding L at the bottom of the blackboard is slightly beveled so that the powdered chalk fallingfrom the board willstrike this oblique surface and roll off away from the board and down into the trough.

In practice the trough is made of wood and is provided with a solid bottom havinga perforated wire cloth top but it should be distinctly understood that the material of which the trough is made and the shape of the trough may be varied at will without depart- 8o ing from the spirit of the invention. It will also be understood that other material be sides wire netting or cloth may be used for the perforated top without departing from the spirit of the invention and without in any way interfering with its usefulness.

The advantages of the device are as follows:

First. The chalk dust from the board or eraser falls through the upper wire bottom and is held in the trough below it, so that it cannot be reached by crayon or eraser.

Second. The crayons, erasers, 850., placed on the wire bottom are kept from all the dust in the trough, rest always on aperfectly clean surface and are consequently clean when 5 picked up for use.

Third. The erasers can be cleaned by'rapping the rubbed surface on the wire bottom. In either case the dust falls in the trough below.

Fourth. The trough can be easily removed and cleaned by tipping it up on end and emp- IOO tying the dust through the opening in the bottom. This opening is shut with a slide.

, sanitary advantages.

The main feature of the invention is the provision of a trough having an imperforate bottom and what will be termed in this application, a perforated top cover without regard to various equivalents forms and materials which might be substituted for what is shown, without departing from the spirit of the invention, and while the device as shown and described is applicable to blackboards, the right is reserved to use the invention in any other proper and advantageous connection or with any other form of device where the use of such trough maybe advantageous.

The trough as shown, is adapted for use with ordinary blackboards now in use, re-

quiring but little labor and alteration to .put the trough in operative position.

The end pieces B, 13', project out in front of the blackboard a sufficient distance to confine or limit the sweep of the eraser and they also serve to hold the trough against lateral displacement.

I claim 1. A blackboard with an oblique molding at the bottom; in combination with two brackets 0,0, and a removable trough, adapted to fit between the upper ends of the brackets and the lower edge of the oblique molding and a spring catch beneath the trough, substantially as described whereby the trough may be removed and replaced instantly, substantially as described.

2. A blackboard provided with an oblique molding extending along above the upper edge of the trough and end pieces projecting in front of the line of the blackboard and shelves 0,0, adapted to support the trough; in combination with a removable trough having a closed bottom and a perforated top, rigidly secured to the trough beneath the edge of the trough, and suitable moldings F,'forming a guard all around the upper portion of the trough, and a spring locking device secured to the main structure, and aprojection on the bottom of the trough, adapted to engage with the spring catch, substantially as described and for the purposes specified.

In testimony whereof I affix my signature in the presence of two witnesses.

JAMES M. TAYLOR. Witnesses:

B. J. STIMsoN, B. F. CASE.

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