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Publication numberUS883402 A
Publication typeGrant
Publication dateMar 31, 1908
Filing dateMay 27, 1907
Priority dateMay 27, 1907
Publication numberUS 883402 A, US 883402A, US-A-883402, US883402 A, US883402A
InventorsJohn W Hainline
Original AssigneeJohn W Hainline
Export CitationBiBTeX, EndNote, RefMan
External Links: USPTO, USPTO Assignment, Espacenet
Tray attachment for blackboards.
US 883402 A
Abstract  available in
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Claims  available in
Description  (OCR text may contain errors)

PATENTED MAR. 31, 1908.



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with the bottom of the tray JOHN W. HAINLINE, OF GREAT BEND, KANSAS.


Specification of LettersZPatent. Patented March 31, 1908.

Application filed May 27, 1907. Serial No. 376,034.

To all whom it may concern:

Be it known that I, JOHN W. HAINLINE, a citizen of the United States, residing at Great Bend, in the county of Barton and State of Kansas, have invented certain new and useful Improvements in Tray Attachments for Blackboards, of which the following is a speci fication.

This invention pertains to improvements in tray attachments for blackboards, and more particularly to a tray attachment which collects the dust from the chalk, as well as that which notoriously is collected by the eraser, and retains the same at points remote from the chalk and eraser, thus leaving each of the latter free from contact with the chalk dust after the latter has become free of the chalk and eraser.

The invention aims to generally improve, simplify and increase the efficiency of trays of this type and at the same time to render the cleansing of the collecting tray easier than heretofore.

With the above and other objects in view, my invention consists in the novel details of construction and combination of parts to be fully described in the following specification and later pointed out in the claims.

Referring to the accompanying drawings forming a part of this specification and wherein like characters of reference denote similar parts throughout the several views 2-- Figure 1, is a perspective view of my invention, Fig. 2, is a cross section on line 22 of Fig. 1.

In practice I preferably employ two individual supporting base members 1, of strip form provided with screw holes for the reception of screws by means of which thebrackets 2 and 3, are connected to the base members and the latter to the wall.

The brackets 2, are curved in conformity 7, which is mounted thereon. To secure the tray to the brackets 2, I use fastening means 7, which pass through the outer ends of the brackets and the side of the tray, as shown.

The brackets 3, are of approximately U- shape, having a straight bottom and upturned ends, upon which bottom a reticulate receptacle 9, rests, saidreceptacle being held against movement by hooked outer portions 5, formed on the outer free ends of the brackets and screws 6, which latter extend through the Wide imperforate sheet metal back 10, of

receptacle 9, and serve to secure receptacle 9, to the base plate and the wall.

The tray 7, is preferably formed of imperforate sheet metalmade approximately U- shaped in cross section, being of requisite length.

The receptacle 9, is of the same length as tray 7, and made of perforate material mounted upon an oblong open sheet metal frame 9, having the aforesaid wide back plate 10, which seats on the inner ends of brackets 3. Frame 9, is constituted of a front member 9 and endmembers 9*, each formed of narrow strips of metal, the-end members 9*, being connected to the back plate 10.

The tray 7, and receptacle 9, are superposed in such relation as to provide a Wide, open space between them to enable easy and convenient access to the receptacle 9, with a brush or other implement.

The chalk dust resulting from use of the chalk and eraser naturally drops through the reticulate bottom of receptacle 9, and is caught by the imperforate tray or receptacle. It is also possible to cleanse erasers by rubbing them on the reticulate bottom of tray 9.

Back plate 10, serves to protect the lower portion of the black board and prevents the eraser and chalk from discharging their dust thereagainst when the eraser and chalk are placed in the erforate tray.

It will be observed that since the tray and the receptacle are separately and independently supported, either may be removed Without disturbing the other and since a wide open space is left between the two an unobstructed passage is left for the'insertion of a cleaning instrument.

Having thus described my invention what I claim as new, and desire to secure by Letters Patent is l. A device of the class described, comprising superposed trays one of perforate and the other of imperforate material disposed to have a wide open space therebetween.

2. A device of the class described comprising vertical base strips brackets supported on said strips, an im erforate receptacle on the lower of said rackets, and a reticulate receptacle on the upper of said brackets, said receptacles having a wide open space therebetween.

3. A device of the class described, comprising supporting base members, superposed brackets on each of said base members, retaining hooks or fingers on the upper of said brackets, an imperforate sheet metal receptacle on said lower brackets, and a reticulate receptacle on said upper brackets.

4. A device of the class described, comprising supporting base members, approximately U-shaped brackets supported on said base members one above the other, with a wide open space between said brackets, retaining hooks on the outer ends of the upper brackets, a receptacle of imperforate material mounted on said lower brackets and secured thereto, and an oblong open frame having a reticulate bottom portion mounted on said upper brackets and secured by said hooks of the upper brackets, and a wide back plate carried by said open frame and secured to said base members, and seating on the inner ends of the upper brackets.

5. A tray attachment for blackboards consisting of a trap of foraminous material having a frame formed of a front member and end memberseach of stri like form, a wide back plate to abut the b ackboard and protect the latter, said end members being connected to the lower portions of the back plate, means to secure the back plate to the blackboard, and a receptacle of imperforate material secured to the blackboard below said tray so as to leave a wide 0 en space between the two, said receptac e being removable independent of the tray from the blackboard.

6. An attachment for blackboards consisting of a perforate and an imperforate tray disposed in superposed. relation so as to have a wide open space therebetween, and means for attaching each tray independently to the blackboard, so that the imperforate tray may be removed without disturbing the perforate tray.



Referenced by
Citing PatentFiling datePublication dateApplicantTitle
US2469347 *Dec 16, 1948May 3, 1949American Seating CoUnitary chalk and eraser holder
US2763937 *Apr 18, 1950Sep 25, 1956Urbain Leon FChalk trough
US5035626 *Jun 1, 1990Jul 30, 1991Westinghouse Electric Corp.Markerboard
Cooperative ClassificationB43L1/06