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Publication numberUS3043023 A
Publication typeGrant
Publication dateJul 10, 1962
Filing dateNov 21, 1961
Priority dateNov 21, 1961
Publication numberUS 3043023 A, US 3043023A, US-A-3043023, US3043023 A, US3043023A
InventorsColpo Albert D
Original AssigneeColpo Albert D
Export CitationBiBTeX, EndNote, RefMan
External Links: USPTO, USPTO Assignment, Espacenet
Chalkboard and supporting means therefor
US 3043023 A
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Description  (OCR text may contain errors)

July 10, 1962 A. D. COLPO CHALKBOARD AND SUPPORTING MEANS THEREFOR Filed Nov. 21, 1961 2 Sheets-Sheet 1 W 3 Q 1 1 0 ....A./ 0 /w 6 w MI W M 1 10 rd 6 m .r

w BK w 0 l nfi 1?. 211. 2L 7 INVENTOR. ALBERT D. COLPO BY ATTYS.

July 10, 1962 A. D. COLPO CHALKBOARD AND SUPPORTING MEANS THEREFOR 2 Sheets-Sheet 2 Filed NOV. 21, 1961 INVENTOR. A LBERT D. COLPO BY Q um.

ATT YS.

rates v Patented July 10, 1962 3,043,023 CHALKBQARD AND SUPPGRTING MEANS 'IHEREFGR Albert D. Colpo, 3797 Kaufifman Road, Stow, Ohio Filed Nov. 21, 1961, Ser. No. 153,949 Claims. (Cl. 35-63) This invention relates to chalkboards for Wall mounting in schoolrooms, offices, and the like, and to the combination of such boards with the mounting means.

In recent years, slate chalkboards have been replaced with boards made of a steel sheet, the outer surface of which is appropriately treated to adapt it to receive chalk, and with the metal sheet being usually adhesively secured to a backing sheet of fiber or strawboard, the resulting laminate being mounted in a frame and secured to a wall in the position desired. However, known framing and frame mounting techniques leave much to be desired. The frames are often cumbersome, expensive, or difiicult to manufacture, and mounting techniques are difiicult, and are either insecure, or are so permanent that the changing of the boards to a new location becomes exceedingly diflicult.

It is the general object of the present invention to avoid and overcome the foregoing and other difficulties of and objections to prior art practices by the provision of a relatively simple, inexpensive, highly attractive, and durable and long-wearing chalkboard assembly and framing, together with a simple, rapid, mounting technique which not only holds the chalkboard securely in position on a wall, but which permits the changing of the boards to a new location should this become desirable.

Another object of the invention is the provision of a permanent, attractive, warp-free framing for a chalkboard, the framing being made from extruded metal, such as aluminum, and with the framing being quickly secured to a chalkboard even though the board is of an odd or special size.

Another object of the inveniton is to provide a framing for a chalkboard, the framing having an E-shape in cross section, the top and middle leg of the E engaging the chalkboard, and the lower leg of the E engaging the wall and providing a mounting flange for the assembly.

Another object of the invention is the provision of framing for a chalkboard, which framing adapts itself to the mounting of a cork board, or the like, together with the chalkboard.

\Another object of the invention is to provide improved mounting means in combination with a framed chalkboard, the mounting means being simple and inexpensive and being capable of handling an installation or reuse by the original installer of the boards, or by a maintenance man in a school, and serving to hold the chalkboard securely in position on a wall, but facilitating changes of position of the chalkboard should this be necessary.

Another object of the invention is the provision of an improved combination whereby the chalkboards can be adjusted vertically on a wall, and held firmly in any adjusted position, by relatively simple, positive, inexpensive, and readily operated means.

The foregoing objects of the invention, and other objects which will become apparent as the description proceeds, are achieved by the provision of the combination in a chalkboard and a supporting wall of a metal sheet having a surface treated to take chalk, a relatively thick composition board adhesively secured to the metal sheet, an extruded metal frame having an E shape in cross section surrounding the sheet and board, the legs of the E being cut away at the corners, the middle and outermost legs of the E engaging the sheet and board and the innermost leg of the E engaging the wall, the frame having ends butting at the center bottom of the frame, a chalk tray of extruded metal having a horizontal flange engaging under the frame, a vertical flange engaging and covering the front of the lower edge of the frame, and a horizontal flange forming the chalk tray and extending forwardly of the top edge of the vertical flange, means for fastening the chalk tray to the frame, and brackets secured to the supporting wall and engaging behind the innermost leg of the top edge and the side edges of the frame.

In the preferred practice of the invention brackets engaging with the side edges of the frame have a long leg at one side of the frame and a short leg at the other whereby the innermost flange at one side of the frame can be stabbed behind the long legs of the brackets, and the opposite edge of the frame can be swung past the short legs of the opposite brackets and then the whole frame moved laterally to engage the innermost flange of the frame behind the short legs of the brackets without moving the opposite side of the frame completely off the long legs of the opposite brackets, and means in the frame movable into engagement with at least certain brackets to lock the frame against lateral movement thereon.

For a better understanding of the invention reference should be had to the accompanying drawings wherein:

FIG. 1 is a front elevation of a chalkboard assembly and mounting brackets constructed in accord with the principles of the invention; 7

FIG. 2 is an enlarged fragmentary cross-sectional view taken substantially on line 22 of FIG. 1;

FIG. 3 is an enlarged fragmentary view taken substantially on 3-3 of FIG. 1;

FIG. 4 is an enlarged fragmentary cross-sectional view taken substantially on line 44 of FIG. 1;

FIG. 5 is an enlarged fragmentary cross-sectional view taken substantially on line 5-5 of FIG. 1;

FIG. 6 is an enlarged fragmentary cross-sectional view taken substantially on line 66 of FIG. 1;

FIG. 7 is an enlarged fragmentary cross-sectional view, partially broken away, and taken substantially on line 77 of FIG. 1;

FIG. 8 illustrates diagrammatically the manner of securing the chalkboard assembly to the mounting brackets;

FIG. 9 is an enlarged fragmentary vertical cross-sectional view, partially broken away, and showing the improved combination for mounting the chalkboards for vertically adjustable positioning upon a wall;

FIG. 10 is a perspective view, slightly enlarged, of the top mounting bracket utilized in FIG. 9; and

FIG. 11 is a view similar to FIG. 10 but of the bottom mounting bracket of FIG. 9.

In the drawings, the numeral 10 indicates generally a chalkboard assembly having a frame 12 and a chalkboard sheet 14. The chalkboard sheet 14 has a surface appropriately treated so that it will take chalk, and by this is meant that it can be written on with a piece of chalk. The most conventional chalkboard sheets now constitute a relatively thin sheet of metal 16, such as steel, the outer surface of which has been appropriately treated so that it will take chalk. Adhesively secured to the back of the metal sheet 16 is arelatively thick sheet 18 of a composition board, such as fibers impregnated with a suitable hinder, the exact composition of this board forming no part of the present invention. The composition board 13 can be of various thicknesses, usually from about onequarter inch up to about one-half inch in thickness, the better boards having the greater thickness, and this board acts not only to support the metal sheet 16, and to keep it from bowing, but acts a a sound deadening means. The chalkboard sheet 14 is normally of a polygonal shape, such as a rectangle, and is of any desired size for the use to which it is to be put. In chalkboards for schools the board may be from three to four feet high, and may be from five to twelve feet long.

The frame 12 of the assembly of the invention, is made from extruded metal, such as aluminum or its alloys, and as seen in the various cross-sectional views of the drawings, the frame is made with an E-shape in cross section having an upper leg 20, a middle leg 22, usually of more than twice the length of the upperleg 20, and a lower leg 24 usually slightly shorter than the upper leg 20. The chalkboard sheet 14 is of a thickness to be snugly received between the upper leg 20 and the middle leg 22 of the frame 12, in the manner best seen in FIG. 2, and with the lower leg 24 of the frame 12 serving to engage flatly against the mounting wall, all as hereinafter more particularly described. For purposes of simplicity, the mounting wall has been shown only in conjunction with FIGS. 6 and 7.

The frame 12 is extruded as a long metal strip, and this strip is cut to a length, prior to framing, so that it will extend completely around the periphery of the chalkboard sheet 14. In actually laying the metal frame 12 around the chalkboard sheet 14 the legs 20, 22 and 24 of the frame are cut away in 90-degree notches so that the frame 12 can be bent to form a mitered corner, like frame. Stated in another manner, the right angle or V- shaped notches cut in the legs 20, 22 and 24 of the E- shaped frame extend down to the upright portion of the E of the E-shaped frame, but not through the upright portion. This not only facilitatesbending of the frame about the corners, but also insures that the frame does not have to be cut completely through. The ends of the one-piece frame 12 are normally cut to engage or substantially engage in abutting end to end relation usually at the center of the bottom of the frame, this point of engagement being indicated by the dotted line 28 in FIG. 1.

Secured to the lower horizontal edge of the frame and board assembly is a chalk tray, indicated as a whole by the numeral 30 and shown in detail in FIG. 5. The chalk tray 36 includes a horizontal lower flange 32 extending under the lower edge of the frame, an integral vertical flange 34 extending over the front edge of the frame, and an integral horizontally extending flange 36 directed outwardly from the top of the vertical flange 34 and shaped as a flat tray to receive chalk. A fillet flange 38 engages with the outer surface of the chalkboard sheet 14 to complete the assembly of the chalk tray. The chalk tray 31) is normally made of the same extruded metal as the remainder of the frame, and is held in the position indicated by means of a plurality of bolts 40 extending through the vertical flange 34 and the frame 12.

It is often desirable in a chalkboard assembly to provide along the top or the side of the board one or more panels of cork so that these cork panels can serve as bulletin boards for any announcements or materials to be thumbtacked, for example, thereto. The present invention is particularly adapted to providing chalkboards having cork panels associated therewith. In FIG. 1, a cork panel 42 is illustrated, this being separated from the chalk 14 by a divider 44. FIG. 3 illustrates in greater detail 7 the divider 44 formed of extruded metal of a type similar to the rest of the frame, and having an H-shape in cross section. The upright leg of the H of the divider forming the outer surface of the divider being relatively short whereas the opposite leg of the H is relatively long to provide more complete support for the cork board 42 and the chalkboard sheet 14. The corkboard 42 will generally be formed to a thickness of a quarter of an inch or slightly greater, and will be adhesively secured to a relatively stiff backing sheet 46 of pressed wood, such as Masonite.

The manner of securing the ends of the divider 44 into the frame 12 is best seen in FIG. 4. This is achieved by cutting away the cross leg of the H of the H-shaped divider 44 back a distance of three-quarters of an inch or so, which then allows the long leg of the H of the divider to be bent as shown at 50 in FIG. 4 and attached by a screw 52 to the long leg 22 of the E of the frame 12. The short leg of the divider 44 is cut to just abut, as at 54, with the outermost leg 20 of the E of the frame 12.

Coming now to the manner of mounting the assembly as described upon a vertical wall, the invention provides a plurality of brackets indicated as a whole by the numeral 60. The brackets are more specifically shown in FIGS. 6 and 7, and these brackets are usually formed of steel stampings of the cross-sectional shape shown and having a length of from about one to about two inches. Each bracket 60 has one leg or flange 62approxirnately one-half inch long and a short leg or flange 64 one-half the length of the leg 62, for example one-quarter of an inch, both the legs 62 and 64 being offset from the base 66 of the bracket a distance substantially equal to the thickness of the leg 2.4 of the E of the frame 12. The bases 66 of each bracket 60 are adapted to be secured to the mounting wall by suitable fastening means, such as toggle bolts, screws, or the like. Screws 68 are shown in the drawings as one typical means for fastening.

FIG. 6 illustrates that a plurality of brackets are positioned in a horizontal row on the wall at a desired height so that when they engage with the frame the chalkboard assembly is positioned at the proper height on the wall. This top row of brackets is mounted with the long leg 62 of the bracket uppermost, and FIG. 6 illustrates clearly how the innermost leg 24 of the E of the frame 12 engages behind the long leg 62 of the bracket 60 to vertically support the chalkboard assembly and to hold it snugly against the Wall.

FIG. 7 illustrates that the row of brackets 60 along the left-hand edge of the frame 12 are mounted with the long legs 62 of each bracket to the left, and that the row of brackets 60 mounted along the right-hand edge of the frame 12 are mounted with the short leg 64 of each bracket to the right. The spacing horizontally between the vertically aligned row of brackets at the left-hand side of the frame and the vertically aligned row of brackets at theright-hand side of the frame is such, as

best seen in FIG. 8, that the leg-24 of the E of the frame can be stabbed down behind the long leg 62 of each bracket 60 and the right-hand side of the frame can then be swung down in the direction of the arrow 70 with the leg 24 at this 'side of the frame swinging past the short leg 64 of the row of brackets at that side of the frame. This operation is demonstrated in the figure at the left-hand 'side of FIG. 8.

Now the entire frame is moved to the left in the direction shown by the arrow 72 to bring the leg 24 at the right-hand side. of the frame behind the short legs 64 of the brackets 61} at the right side of the frame, all without moving the leg 24 at the left side of the frame out from behind the longer legs '62 on the brackets 60 at the left side of the frame. The described action can be achieved preferably beforeth'e frame is lowered down into vertical engagement with the top horizontal row of brackets 60 but it can usually be achieved, as well, by a slight warping of the frame even though the frame is already supported vertically upon the top horizontal row of brackets.

In order to prevent lateral movement and loosening of the frame and board assembly on the Wall once it is in position as described, suitable means are provided for engagement between the frame 12 and the-brackets 60. These means can take the form of screws 74 tapped into the frame 12 and engaging with the ends of the long legs 62 of the brackets 60 at the left of the frame. FIGS. 9, 10, and 11 illustrate a modification of the invention particularly adapted to allow for vertical adjustment of the position of a chalkboard assembly on a wall. More specifically, the numeral indicates one of a plurality of conventional fastening channels positioned in vertically directed, horizontally spaced position on a wall and secured thereto by suitable fastening means not shown.

These channels are of the type Well known in mounting adjustable shelves, and wherein the channel has a U- shape in cross section, is made of steel, and is provided with a plurality of vertically spaced slots on the front face of the channel, such slots being indicated by the numeral 82.

Any selected slot 82 is adapted to removably receive an ear 84 extending rearwardly from a top bracket, indicated as a whole by the numeral 86 and best seen in FIG. 10. The bracket 86 includes a flat plate 88, and the ear 84 extending rearwardly therefrom is welded or peened to the plate 88, or is struck out from the plate as part of the stamping of the plate. The plate 88 also is formed integrally with two upwardly and forwardly extending fingers 90, and these fingers are adapted to engage behind the innermost leg 24 of the E of the frame 12 of the chalkboard assembly constructed as heretofore described.

FIG. 11 indicates as a whole by the numeral 92 a bottom bracket having an upstanding flange 94 to which is secured an ear 96, similar to the car 84, and with the car 96 being adapted to be received in any selected slot 82 in the upright channel 80, all in the manner shown in FIG. 9. Formed integrally with the upright flange 94 is a horizontal flange 93 which engages under the bottom of the frame 12, and with the flange 98 having a short vertical flange 1% at its forward edge engaging with the forward face of the lower edge of the frame 12. The bracket 92, as well as the bracket 86 is made of stamped steel and possesses relatively high strength.'

In the use of the means of FIG. 9, two, three, or more vertically directed, horizontally spaced channels 80 each with its upper bracket 86 and its lower bracket 92 are normally employed to support a single chalkboard assembly. If chalkboard assemblies are positioned in side edge to side edge abutting relationship along the wall, it is usually desirable to position one of the channels 80 midway behind the abutting side edge faces of adjacent chalkboard assemblies, and when this is done the bracket 86 is wide enough so that one finger 90 engages with the frame of one chalkboard assembly and the other finger 95 engages with the frame of the adjacent chalkboard assembly. In like manner, the bracket 92 will engage with the frames of the adjacent chalkboard assemblies. In any event, with the mounting as illustrated in FIGS. 9, 10, and 11, it is a relatively simple matter to adjust the vertical position of a chalkboard assembly on the mounting channels 80. This is accomplished simply by raising the chalkboard assembly off the mounting brackets 86 and 92, repositioning the brackets to the height desired, and then replacing the chalkboard assembly on the mounting brackets.

While a certain representative embodiment and details have been shown for the purpose of illustrating the invention, it will be. apparent to those skilled in this art that various changes and modifications may be made therein without departing from the spirit or scope of the invention.

What is claimed is:

1. The combination in a chalkboard and a supporting wall of a metal sheet having a surface treated to take chalk, a relatively thick composition board adhesively secured to the metal sheet, an extruded metal frame having an E-shape in cross section surrounding the sheet and board, the legs of the E being cut away at the corners,

the middle and outermost legs of the E engaging the' ing behind the innermost leg of the top edge and the side edges of the frame, the brackets engaging with the side edges of the frame having a long leg at one side of the frame and a short leg at the other side of the frame whereby the innermost leg at one side of the frame can be stabbed behind the long legs of the brackets and the opposite edge of the frame can be swung past the short legs of the opposite brackets and then the whole frame moved laterally to engage the innermost leg of the frame behind the short legs of the brackets without moving the opposite side of the frame completely off the long legs of the opposite brackets, and means in the frame movable into engagement with at least certain brackets to lock the frame against lateral movement thereon.

2. The combination in a chalkboard and a supporting wall of a metal sheet having a surface treated to take chalk, a relatively thick composition board adhesively secured to the metal sheet, an extruded metal frame having an E-sha-pe in cross section surrounding the sheet and board, the legs of the E being cut away at the corners, the middle and outermost legs of the E engaging the sheet and board andv the innermost leg of the E engaging the wall, the frame having ends butting at the center bottom of the frame, a chalk tray of extruded metal, means fastening the chalk tray to the lower edge of the frame,

brackets secured to the supporting wall and engaging behind the innermost leg of the top edge and the side edges of the frame, the brackets engaging with the side edges of the frame having a long leg at one side of the frame and a short leg at the other side of the frame whereby the innermost leg at one side of the frame can be stabbed behind the long legs of the brackets and the opposite edge of the frame can be swung past the short legs of the opposite brackets and then the whole frame moved laterally to engage the innermost leg of the frame behind the short legs of the brackets without moving the opposite side of the frame completely off the long legs of the opposite brackets, and means in the frame movable into engagement with at least certain brackets to lock the frame against lateral movement thereon.

3. The combination in a chalkboard and a supporting wall of a metal sheet having a surface treated to take chalk, a relatively thick composition board adhesively secured to the metal sheet, an extruded metal frame having an E-shape in cross section surrounding the sheet and board, the legs of the E being cut away at the corners, the middle and outermost legs of the E engaging the sheet and board and the innermost leg of the E engaging the wall, the frame being formed from a single length of material and wrapped around the edge of the sheet and board, a chalk tray, means fastening the chalk tray to the lower edge of the frame, brackets secured to the supporting wall and engaging behind the innermost leg of the top edge and the side edges of the frame, the brackets engaging with the side edges of the frame having a long leg at one side of the frame and a short leg at the other side of the frame whereby the innermost leg at one side of the frame can be stabbed behind the long legs of the brackets and the opposite edge of the frame can be swung past the short legs of the opposite brackets and then the whole frame moved laterally to engage the innermost leg of the frame behind the short legs of the brackets without moving the opposite side of the frame completely off the long legs of the opposite brackets, and means in the frame movable into engagement with at least certain brackets to lock the frame against lateral movement thereon.

4. The combination in a chalkboard and a supporting wall of a metal sheet having a surface treated to take chalk, a relatively thick composition board adhesively secured to the metal sheet, an extruded metal frame having an E-shape in cross section surrounding the sheet and board, the legs of the E being cut away at the corners, the middle and outermost legs of the E engaging the sheet and board and the innermost leg of the E engaging the Wall, the frame having ends butting at the bot tom of the frame, a chalk tray of extruded metal having a horizontal flange engaging under the frame, a vertical flange engaging and covering the front of the lower edge of the frame, and a horizontal flange forming the chalk tray and extending forwardly of the top edge of the vertical flange, means for fastening the chalk tray to the frame, and brackets secured to the supporting wall and engaging behind the innermost leg of the top edge and the side edges of the frame. i

5. The combination in a chalkboard of a metal sheet having a surface treated to take chalk, a relatively thick composition board adhesively secured to the metal sheet, an extruded metal frame having an E-shape in cross section surrounding the sheet and board, the legs of the E being cut away at the corners, the middle and outermost legs of the E engaging the sheet and board and the innermost leg of the E engaging the wall, the frame having ends butting at the center bottom of the frame, a chalk tray of extruded metal having a horizontal flange engaging under the frame, a vertical flange engaging and covering the front of the lower edge of the frame, and a horizontal flange forming the chalk tray and extending forwardly of the top edge of the vertical flange, and means for fastening the chalk tray to the frame.

6. The combination in a chalkboard of a polygonal shaped sheet having a surface which will take chalk, an extruded metal frame having an E-shape in cross section surrounding the sheet, the legs of the E'being cut away at the corners, the middle and outermost legs of the E engaging the sheet and the innermost leg of the E engaging the wall, the frame having ends butting at the bottom of the frame,.a chalk tray of extruded metal having a vertical flange engaging and covering the front of the lower edge of the frame, and a horizontal flange forming the chalk tray and extending forwardly of the vertical flange, and means for fastening the chalk tray to the frame.

7. The combination in a chalkboard and a supporting wall of a board having a surface capable of taking chalk, a frame surrounding the board, said frame having a leg-like flange adapted to flatly engage the wall and positioned in an inward direction to lie behind the board, brackets secured to the supporting wall and engaging behind the flange on the top edge and the side edges of the frame, the brackets engaging with the side edges of the frame having an eflectively long leg towards one side of the frame and an efiectively short leg towards the other side of the frame whereby the flange at one side of the frame can be stabbed behind the effectively long legs of the brackets and the opposite edge of the frame can be swung past the effectively short legs of the opposite brackets and then the whole frame moved laterally to engage the flange of the frame behind the efiectively short legs of the brackets without moving the opposite side of the frame completely off the elfectively long legs of the opposite brackets, and means in the frame movable into engagement with at least certain brackets to lock the frame against lateral movement thereon.

8. The combination defined in claim 6 wherein the sheet is made in a plurality of pieces with at least one piece being adapted to receive thumbtacks, a divider of extruded metal having an H-shape in cross section is provided between the pieces, the cross leg of the H being cut away at the ends of the divider, and means fastening one leg of the H to the frame at each end of v the divider.

9. The combination defined in claim 6 wherein the center leg of the E is longer than the top and bottom legs.

10. The combination in a chalkboard and a supporting wall of a plurality of vertically extendinglaterally spaced mounting strips having vertically spaced slots therein, a plurality of brackets each having a horizontal flange engaging under the lower edge of a chalkboard and a vertical flange engaging with a strip, a finger on the back of the vertical flange engaging and locking in a downward direction in a selected slot in a strip, a second plurality of brackets each having a vertically extending plate, a pair of laterally spaced outwardly and vertically upward directed clips on each plate, a finger on the back of each plate and engaging and locking in a downward direction in a selected slot in a strip, and a downwardly directed flange along the upper edge of the chalkboard engaging behind the clips on each plate.

References Cited in the file of this patent UNITED STATES PATENTS 2,075,588 Meyers Mar. 30, 1937 2,521,603 Prew Sept. 5, 1950 2,679,700 Urbain June 1, 1954 2,761,640 Frater Sept. 4, 1956 2,987,832 Urbain et al June 13, 1961

Patent Citations
Cited PatentFiling datePublication dateApplicantTitle
US2075588 *Jun 22, 1936Mar 30, 1937James V LewisMirror and picture frame
US2521603 *Mar 26, 1947Sep 5, 1950Pru Lesco IncPicture frame securing means
US2679700 *Apr 6, 1950Jun 1, 1954Urbain Leon FPortable display board construction
US2761640 *Jan 18, 1952Sep 4, 1956Frater Julius TAdjustable chalkboard mounting
US2987832 *Apr 29, 1957Jun 13, 1961Glowacki Matthew PBlackboard setting system
Referenced by
Citing PatentFiling datePublication dateApplicantTitle
US5727952 *Jul 19, 1996Mar 17, 1998Classic Modular Systems, Inc.Edge-encapsulated writing board
US7207805Jun 24, 2004Apr 24, 2007Mooreco, L.P.Encapsulated tray and end caps for a writing board
US7249745Feb 2, 2005Jul 31, 2007Mooreco, L.P.Encapsulated end caps and method of making the same for a writing board tray
Classifications
U.S. Classification434/417, 434/421
International ClassificationB43L1/00, B43L1/06
Cooperative ClassificationB43L1/06
European ClassificationB43L1/06