Abstract:
Elements for connecting boards or plates, the element comprising a ring having a cross section of a three quarter circle extending into a right angle. The ring has a circular opening extending therethrough. The elements are fastened to two or more boards and a rod is removably placed so as to traverse all circular openings of the elements.

Description:
REFERENCE TO RELATED APPLICATIONS 
     This is a Continuation-In-Part-Application to my pending application, Ser. No. 310,316, filed Nov. 29, 1972 now abandoned, entitled &#34;Element for the Connection of Rods and Boards and the like arranged thereon, particularly for use in connecting parts of furniture.&#34; 
    
    
     BACKGROUND OF THE INVENTION 
     The invention relates to devices and methods for connecting boards, plates and the like, particularly for use in joining furniture parts to one another in a novel manner. 
     DESCRIPTION OF THE PRIOR ART 
     Devices and methods have been known in the past for joining parts of furniture, such as cabinets, chests, desks, dressers, shelves, and the like, the parts including walls, bottoms and tops of seats and back rests of chairs, and the like. 
     The various furniture parts were connected by means such as screws, bolts, nuts and nails. Other types of connections included pins and holes, tongue and grooves and the like. 
     It will be appreciated that these connections have certain disadvantages. The parts can only be joined in a predetermined manner. The connections have to be removed when the furniture parts are taken apart, for instance for moving to a new home, and have to be reinserted there except for very bulky pieces of furniture which are transported without being dismantled. Repeated removal and reinsertion of connecting means, such as screws, nails and the like are liable to cause damage, in particular to screw bores and nail holes. 
     The present invention envisions the provision of elements for the connection of furniture parts which make it possible to connect them in any desired position and in any direction. This is rather important for furniture, such as wall shelves, flower stands, box furniture and the like. Furthermore, the present invention enables ready dismantling of the parts, without having to remove screws or to pull out nails. 
     In a departure from the known connecting means, the instant invention envisages an element for the connection of plates, boards, and the like, which element is formed of a ring having a cross-section of a three-quarter circle and preferably a right-angular point, the ring being provided with a through-going opening co-axial with the circle, and being of suitable width. The opening is preferably round in cross-section. 
     SUMMARY OF THE INVENTION 
     An element for connecting boards or plates with one another. The element has the configuration of a threequarter ring with tangential surfaces joining in a right angular corner. The ring has a central circular throughgroup opening. In joining a plurality of boards to which the connecting elements are fastened in complementary positions, the joint is secured by a rod through the central openings of the elements. 
    
    
     BRIEF DESCRIPTION OF THE DRAWINGS 
     FIGS. 1 to 8 illustrate several embodiments of elements according to the invention in perspective views. 
     FIG. 9 is a perspective view of a board to which connecting elements according to the invention have been fastened on opposite edges thereof. 
     FIG. 10 is a schematic side view of connecting elements fastened to horizontal and vertical boards and joining same. 
     FIG. 11 is a front view of a shelf-assembly, the shelves thereof having been joined to one another by the connecting elements according to the invention. 
     FIG. 12 is a front view of another shelf assembly wherein the shelves are arranged in a slightly off-set manner relative to one another. 
    
    
     DESCRIPTION OF THE PREFERRED EMBODIMENTS 
     Referring now to FIGS. 1 to 8 of the drawings, the novel element has a cross-section of substantially a three-quarter circle 1 and a right-angular corner 2. Co-axially with the three-quarter circle 1 the element is provided with a preferably circular opening 3. The flat surfaces 4 adjacent the edge 5 serve for abutting the parts to be connected. The element is of desired height. In the embodiment of FIG. 2, a lot 6 is arranged in one of the flat surfaces 4, into which the part to be connected can be inserted having a corresponding projection. The embodiment of FIG. 1 is the reverse of that of FIG. 2. On one of the flat surfaces 4 a right-angular projection is provided which engages a corresponding slot in the part to be connected. The embodiment according to FIG. 4 has on one flat surface 4 a cylindrical plug 8 which engages a corresponding depression in the part to be connected. In the embodiment of FIG. 5 a wedge-like projection is provided, while the embodiment of FIG. 6 has two rectangular projections spaced from one another. A wedge-like projection 9 as shown in FIG. 5 may additionally be arranged between the two projections 7 of FIG. 6. As illustrated in FIG. 7, it is possible, in addition to the throughgoing opening 3 which is co-axial with the circle 1, to provide a plurality of throughgoing circular openings 10 arranged equally spaced on a circle co-axial with the opening 3, the openings 10 having the same diameter. In the embodiment of FIG. 8 one of the flat surfaces 4 is undercut at 12. A somewhat different feature is provided in FIG. 3. A screw 11 is inserted through the element at right angle to one flat surface 4 adjacent opening 3. The screw is adapted to engage the part to be connected. 
     Furthermore, if desired, one or more sleeve-like projections may be arranged on one or both of flat surfaces 4. Plugs or pinlike projections may be provided in said sleeve-like projections and co-axial therewith. 
     In the event that the elements are of short height, only one slot such as slot 6 of FIG. 2 or one projection such as projection 7 of FIG. 6 or plug 8 of FIG. 7 may be provided. 
     FIG. 9 illustrates a board 21 with connecting elements 23,25 fastened thereto at one edge 27, and connecting elements 23,31 fastened to an opposite edge 33. The connecting elements are fastened at the edges spaced from one another in desirable positions. Another board (not shown) which is to be joined to the board 21 will have connecting elements fastened to its edges at positions corresponding to empty spaces on the edges of the board 21. 
     In order to join two boards, the boards will be placed at a desired angle relative to one another with the central openings 3 of their connecting elements all aligned. A cylindrical rod is inserted in all aligned openings 3, thus making a permanent or pivotable joint between the two boards. 
     Fastening the connector elements to the boards may be done by one of two methods. The first calls for the use of a connector element which has no recesses nor projections on its surface, such as the type shown in FIG. 7. One of the straight portions 4 is glued to the edge of the board at a predetermined position; preferably two or three such connectors are so glued, all being spaced from each other. A second, or third or fourth board is similarly prepared by glueing the elements thereto. However, their spacings must be staggered relative the other boards so that they form together a continuous row of elements when the boards are joined, wherein the central openings 3 of each connector are aligned. By inserting a cylindrical rod through the central openings of all the connectors, the boards are now connected. 
     Conversely, by simply removing the rod, they become separate again. It goes without saying, that the same method can be applied to connectors as shown in FIGS. 1-6 and 8, provided the edges of the boards are equipped with projections and recesses, fitting into corresponding recesses or projections to be held therein by friction. 
     The connector elements are inserted into the preformed edges from the ends thereof, preferably two or three such connectors being left in predetermined positions spaced from one another. 
     Furthermore, the invention provides for guide rails which are either attached alongside the edges of a board over which the profiled portions of the connectors can be slipped. 
     The other method provides for slipping onto a circular rod a number of connectors, each in a different position depending on the desired extension of their straight portions, and this in accordance with the number of boards to be connected. Subsequent thereto, another set-or two-of connectors is slipped onto said rod. Thereafter, one board after the other is either inserted into the projections of the connectors which are intended to be attached to it, or is glued to the straight edges of said connectors. 
     FIG. 10 illustrates in a fractional side view a juncture of boards in which two horizontal boards 41,43 and two vertical boards 45,47 are joined by the novel connector elements the central openings 3 of all connectors being aligned. The fastening of the connector elements to the four boards may have been made by the first or the second method set forth in the preceding paragraphs. 
     FIG. 11 illustrates a wall shelf assembly which may serve as a furniture piece for placing thereon books, lamps, flowers, a radio set and the like. 
     It will be noted that the junctures include connections between two, three or four boards. 
     In particular, juncture 51 connects two boards, 53 and 55. Juncture 57 connects three boards, 51, 59 and 61, while juncture 63 connects four boards, 65, 67, 69 and 71. 
     All the junctures have been established by one or the other of the methods previously described. 
     A significant advantage of the invention resides in the fact that the connectors may be so assembled that the horizontal as well as the vertical boards are arranged slightly off-set relative to each other, thus obtaining a particularly decorative construction, as readily seen in FIG. 12 in which boards 81 and 83 are parallel but not aligned, yet boards 81 and 85 are aligned. The same relationship prevails among the boards 87, 89 and 91. This result is achieved by positioning the boards such that for instance in juncture 93 the connector elements of board 83 are directed upwardly, while the elements of board 85 point downwardly. Similarly, in juncture 95, the elements of board 87 are directed to the left while the elements of board 89 are to the right. 
     Furthermore, the connectors may be slipped on the common cylindrical rod at any desired angular position, so that the straight portions of the elements with or without their projections or recesses may point to different angular positions and, therefore the boards to be connected thereto will assume different angular positions to each other. Thus, the invention makes it possible to obtain furniture of special design which deviates from furniture with known right-angular planes only. 
     To prevent the elements from rotating on the rod, a fixing pin may be inserted through the element, as indicated in FIG. 3. The element is expediently made of wood, but it may also be made of plastic and the like material.