US1984845A - Attachment for blackboards - Google Patents

Description

Dec. 18, 1934. H. L. SMITH ET AL 1,934,845

ATTACHMENT FOR BLACKBOARDS Filed April 25, 1952 2 Sheets-Sheet 1 Dec. 18, 1934, H, L.-SMITH ET AL 1,984,845

ATTACHMENT FOR BLACKBOARDS Filed April 25, 1932 2 Sheets-Sheet 2 g IN N 63s ATTORNEIQS along a stool strip is arranged along the lower time nee. 1a, 1934 "useus ;eme f Howard L. ,Lestcr 'AppIloationAprllfii, 120MB.

This invention relatesv to attachments for biackboards.

Usually in school rooms practically all the wall space is taken up by blackboards and it is the object of this invention to provide meansfor detachably supporting over the face of a blackboard leaves which may be used to mount picturesor the like or maybearranged ininclined position for use as easels.

' According to this Invention a head strip is arthe upper edge of the blackboard the blackboard, these strips forming edge of receive the top and bottomedges of channels to a leaf to-su'pport the same over the blackboard.

the. upper channel being of suilicient depth to allow the leaf to be lifted to a sumcient height to clear the stool strip in putting up or taking down the'leaf. The leaf may-be supported in a'ninclined position by means of detachable brackets.

these brackets being provided at their outer ends with grooves which receive thebottom edge of I the leaf. These brackets may also support a in which maybe arranged painting materials and the like and whieh'will catch any dust or drip- I pings falling from the board.

Other objects, novel features of this invention will be apparent from the following speciflcation and accompanying drawings, wherein:

1 is a perspective view of a blackboard equipped with the invention and supporting a board in vertical position; v r Fig. 2, is 'a similar view with the brackets in place and supporting the board in inclined position;% "v

I Fig. 3 isfla section on the line 3-3 of Fig. .1; Fig.4 is a fragmentary vertical section on the line 4-4 of Fig; 2;

the invention; and

Figs. 6 and 'i are perspective views of the head.

and stool strips of said modification.

Referring-now more especially to Figs. 1- to 4 inclusive, the blackboard and frame 10 are mounted on the wall in any suitable manner. A head strip 11 is fastened to the top portion of the blackboard frame by screws or the like to form a channel therewith and is so cur'vedas to be capable of supporting. picture'hooks 12. A stool strip. 13 has a portion extending between the molding 14 and the bottom portion of the blackboard, frame and is offset at its frontedge to form an inverted groove 15 which provides a channel at the bottom edge of the blackboard. A' leaf 16 of wood, composition material or the like may be mounted over the blackboard by inserting the upper edge thereof into the channel formed by head strip 11 and lifting the same until its bottom edge clears the offset 15 and then and advantages samurai-i wash-ma, any; as N. Neulesn'WestlngIewool,

mm mm (cl..' I

oppins-tiie .to t its bottom edgeg'inthe channel atthe bottom of the 'lheleaf 16 may beremovcdby reversing cedureiust described. may Mind to support maps, pictures or .the like which be aiiix'ed to the board by use of thumbrtacks'. orothersimilarmeans.

The leaf 16. may be supported in position for use as an easel. WW there are provided brackets '17, the'innere'nds; of which are rolled as at is to form ribsutobe received in'the groove 15. These brackets 17 are fulcrumed on the outer edge of the chalk trough 19 with their ends 18 seated in the'groove 15. The outer endsof the brackets are bent'as at 20 to'roceive and support a tray 21. Tabs22 are struck out from the brackets 17 to provide grooves in which the bottom edge of the board 16 maybe received, as shown in Figs. 2 and 4. Whenthebottomedgeoftheieafisarrangedin these grooves, it assumes the inciinedposition showninl'igJandmaythenbeusedasaneasel tosupport. drawing-paper. Drawing materials also serve t'ocollect dust or drippings which may drop from the leaf l6.

Referring now to'l 'igs. 5 to '1 inclusive, a head strip 25 is fastened to the top portion of the blackboardframe by screws or the like to provide a channel therewith and is provided with an incli and the like my be arranged in the tray 21 which a longitudinal recess 23 in which may be received the 'rolled endof a capor chart hook 27, the hook being insertableinto the recess thro gh a cut-out 28. A stool strip 29 is fastenedv to the lower portion of the blackboard frame and its outer edge is offset at 30 to provide a channel at the bottom edge of the blackboard, the extreme edge of the offset being turned over to form a hook flange 30a. A laminated leaf 31 has its upperand lower edges received in the channels formed by the head strip and stool strip and may be removed simply by lifting the leaf and swinging its lower edge clear of the offset 30, the lifting of the leaf being facilitated through the provision of finger slots '32. j

' The leaf 31 may be supported in inclined tion for use asan easel by means of the structure subsequently to. be described. Brackets 33 :are

' detachablyv supported from the blackboard frame. Each bracketconsists of a metal strap bent toform two legs, the endof one leg being curved to form .a hook 34 which is adapted to engage the hook flange 30a and the end of the other .leg being bent to form a contact portion around which is arranged a bumper 35 to engage thewall and support the bracket. The offset 7 portion 30 'of the stool strip is provided with'a cut-out 36 through which the bracket hook 34 may be engaged with the hook flange 30a. At the free end of-the bracket, the metal strap is bent to form a groove or hook 87 in which may be iweived the bottom edge of the leaf 81 to support the same in inclined position for use as an easel. Each bracket is provided with an aperture to receive the hooked end 38 of a bracket 39-, these brackets serving as the support for a tray 40 in which may be arranged drawing materisls and the like and which will also serve to catch dust or drippings from the leaf 81. A brace rod 41 extends between the legs of the bracket and increases the strength and stability of the bracket.

It is of course understood that various modifications may be made in the structure above described, without in any way departing from the spirit of the invention as defined in the appended claims.

The leaf 31 is made up of two lamina, one lamina being a composition board such as cork to which displays of various types may be positioned by thumbtacks, and the other lamina being a smooth hard board on which educational material may be painted or which may have a surfacesuitable for use as a blackboard.

We claim:

1. In combination with a blackboard, a strip extending along the lower edge of the blackboard, and brackets detachably connected to said strip, said brackets being provided with means to receive the bottom edge of a leaf to support the same in inclined position with its top edge engaging said blackboard.

2. In combination with a blackboard, a support therefor, a strip carried by said support and extending along the lower edge of the blackboard, and brackets for supporting a leaf in inclined position with its upper edge engaging the blackboard, said brackets comprising arms having their ends detachably connected to said strip and other arms having their ends adapted to engage said support.

3. In combination with a blackboard, a support therefor, a strip attached to said support and extending along the lower edge of said blackboard, va hooked-flange provided on said strip, brackets for supporting a leaf in inclined position with its top edge resting against said blackboard,

each bracket comprising a metal strap bent to form two arms, a hook at the end of one arm of each bracket detachably engaged with said flange, the end of the remaining bracket arm being adapted to engage said support.

4. In combination with a blackboard, a strip I extending along the lower edge of the blackboard,

' third portion thereof formed to receive the bottom edge of a leaf for supporting the same in inclined position with its upper edge engaging the blackboard.

6. In combination with a blackboard having a chalk trough associated therewith, a strip adiacent the lower edge of the blackboard, brackets fulcruimed on the outer edge of the chalk trough masses with their inner ends underlying said strip, and means on said brackets for receiving the bottom edge of a leaf to support the same in inclined position with its top edge engaging said blackboar 7. In combination with a blackboard having a chalk trough associated therewith, a strip extending along the bottom edge of the blackboard, brackets fulcrumed on the outer edge of the chalk trough with their inner ends underlying said strip, said strip having an offset portion forming an inverted groove and the inner ends of said brackets being provided with means to be received in said grooves, and tabs extending from said brackets for receiving the bottom edge of a leaf to support it in inclined position with its top edge engaging said blackboard.

8. In combination with a blackboard, a support therefor, a strip attached to said support and extending along the lower edge'of said blackboard, a hooked flange provided on said strip, brackets attached to said strip, each bracket comprising a metal strap bent to form two arms,

a hook at the end of one arm of each bracket detachably engaging said flange and the end of the remaining bracket arm being adapted to engage said support, and tabs struck out from said brackets to receive the bottom edge of a leaf for supporting the same in inclined position-with its upper edge engaging the blackboard.

9. In combination with a vertical support and a horizontal strip attached thereto, brackets for supporting a leaf in inclined position with its upper edge engaging said support, each'of said brackets comprising an arm having its end detachably connected to said strip and extending horizontally therefrom and another downwardly oblique arm having its end engaging said sup port.

10. In combination with a vertical support and a horizontal strip attached thereto, brackets for supporting a leaf in inclined position with its top edge resting against said support, each bracket comprising a metal strip bent to form a horizontal arm and a downwardly oblique arm, a hook at the end of the horizontal arm and the end of the downwardly oblique arm engaging said support, and a hooked flange on said strip with which said bracket hook detachably engages. I

11. A device for supporting a leaf in inclined position with respect to a vertical support comprising a strip attached to said support in hori-- zontal position, and brackets having means to receive the bottom edge of said leaf to support the same in inclined position with its top edge engaging said support, each bracket comprising a horizontal arm having its end detachably engaged with said strip and a downwardly'oblique .arm having its and engaging said support.

12. A device for supporting a leaf in inclined position with respect to a vertical support comprising a strip attached to said support in horizontal. position, and brackets having means to receive the bottom edge of said leaf to support the same in inclined position with its top edge engaging 'said support, each bracket comprising a metal strip bent'to form a horizontal arm and a downwardly oblique arm, a hook at the endof the horizontal arm detachably engaging said strip and the end of the downwardly oblique arm engaging said support.

HOWARD L. SMITH. LESTER N. NEULEN.

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