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Publication numberUS905450 A
Publication typeGrant
Publication dateDec 1, 1908
Filing dateMay 7, 1908
Priority dateMay 7, 1908
Publication numberUS 905450 A, US 905450A, US-A-905450, US905450 A, US905450A
InventorsJames I Mcallister
Original AssigneeJames I Mcallister
Export CitationBiBTeX, EndNote, RefMan
External Links: USPTO, USPTO Assignment, Espacenet
Chalk and eraser holder.
US 905450 A
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Description  (OCR text may contain errors)



905,450. I Patented Dec. 1,1908.



Specification of Letters Patent.

Patented Dec. 1, 1908.

Application filed May '7, 1908. Serial No. 431,472.

To all whom it may concern:

Be it known that I, J AMES I. MoAL IsTnn, citizen of the United States, residing at Edmonds, in the county of Snohomish and State of Washington, have invented certain new and useful Improvements in Chalk and Eraser Holders, of which the following is a specification.

It is well known that the insanitary conditions which exist in schools are often caused, or partially caused, by minute particles of chalk dust which are formed by the disintegration of the crayons, or fall from the blackboard erasers, and which become scattered and mingle with the air, and are thus breathed by the pupils.

The object of this invention is an improved device which is designed to support the crayon and the blackboard erasers while the same are not in use, and which is arranged to receive the loose particles of chalk dust and to hold them in confinement, so as to prevent them from becoming scattered and mingling with the atmosphere.

With this and other objects in view that will more fully appear as the description proceeds, the invention consists in certain constructions and arrangements of the parts that I shall hereinafter fully describe and then point out the novel features thereof in the appended claims.

For a full understanding of the invention and the merits thereof, and to acquire a knowledge of the details ofconstruction, reference is to be had to the following description and the accompanying drawing, in which:

Figure 1 is a perspective view of my improved device; Fig. 2 is a longitudinal section thereof; and, Fig. 3 is a section on the line 3 3 of Fig. 2.

Corresponding and like parts are referred to in the following description and indicated in all the views of the drawing, by the same reference characters.

My improved device embodies a bracket that consists of a vertical plate 1, the upper portion of which is forwardly off-set, as indicated at 2, and is normally inclined backwardly beyond the lower portion of said plate 1, and a horizontal plate 3 which extends forwardly from the lower end of the plate. The horizontal plate is arranged to rest upon and be secured to the ledge at the lower end of the blackboard, and the lower portion of the vertical plate 2 is designed to be fastened by screws or the like to the blackboard and to be drawn up thereagainst, whereby to spring the off-set portion of said plate forwardly and cause the upper edge thereof to bear tightly against the board, to prevent any chalk dust or the like from passing behind the bracket. The horizontal plate is arranged to support a box 4, tlie rear end of which is cut away, as indicated at 5, so as to fit under the off-set portion 2, and the sides of said box extend rearwardly beyond the side edges of the offset portion, so as to prevent any sliding movement of the box relative to the bracket. The horizontal plate is formed at its forward extremity with a head 6 in which is mounted a wire 7 that stiifens the horizontal plate, thebead being cut-away at desired intervals, and the wire 7 being looped therethrough to form hooks 8 arranged for engagement with the box to further secure the same to the bracket. The sides and ends of the box are formed above the bottom thereof, at corresponding intermediate points, with inwardly disposed flanges 9 that are arranged to support a tray 10 which is preferably constructed of wire netting or the like, and which is, in the present instance, soldered or otherwise suitably secured to such flanges.

In the practical use of my improved device, the crayons and erasers are placed upon the tray when not in use, and the loose particles of chalk dust obviously fall through the net tray and are received in the compartment or portion of the box below the tray, and by being thus confined therein, are prevented from becoming scattered and mingling with the atmosphere. When it is desired to discharge the dust from the box, the latter is detached from its supporting bracket and is inverted and tapped gently, so as tocause the particles of dust to fall through the tray and thus be released from the compartment in the box.

From the above description, in connection with the accompanying drawing, it will be apparent that I have provided a simple, durable and eflicient construction of device which will serve to maintain better sanitary conditions in the school room, by preventing the loose chalk dust from becoming scattered and mingling with the atmosphere, and

which consists ofcomparatively few parts that may be easily and cheaply manufactured and readily assembled.

Having thus described the invention, what I claim is:

1. In a device of the character described, a supporting bracket consisting of a horizon tal plate and a vertical plate forwardly ofiset above the same, and a removable chalkreceiving box resting upon the horizontal plate and cut away to fit under the ofi'set portion of the vertical plate, the sides of the box projecting above and rearwardly beyond the adjacent edges of the offset portion to prevent any sliding movement of the box relative to the bracket.

2. In a device of the character described a bracket embodying a horizontal plate formed at one end with a hollow bead broken away at an intermediate point a removable chalk-receiving box supported upon the horizontal plate, and a stiffening wire mounted within vthe bead and looped outwardly through the broken away portion to constitute a hook arranged for a detachable engagement with the box.

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


\Vitnesses F. M. STREET, S. M. Evans.

Referenced by
Citing PatentFiling datePublication dateApplicantTitle
US4872237 *Nov 25, 1985Oct 10, 1989Smith Lloyd JChalk dust remover
Cooperative ClassificationB43L1/06