US 3213578 A
Description (OCR text may contain errors)
Oct. 26, 1965 v, w, CASH 3,213,578
BUILDING BLOCK WITH ELECTRICAL TERMINAL BOX CAST THEREIN Original Filed July 7, 1959 INVENTOR.
United States Patent 3,213,578 BUILDING BLOCK WITH ELECTRICAL TERMINAL BOX CAST THEREIN Virgil W. Cash, 4968 Randlett Drive, La Mesa, Calif. Continuation of application Ser. No. 825,522, July 7, 1959. This application Mar. 25, 1964, Ser. No, 360,160 3 Claims. (Cl. 52-173) The present invention is a continuation of my copending application Serial No. 825,522, filed July 7, 1959, now abandoned, and relates to a molded building block in which an electrical receptacle is integrally molded in a wall of the block. The block per se may be formed of any suitable material, such as, for example, concrete, cement, or baked clay, etc.
The present invention is particularly useful in building blocks of the hollow type in which electrical conduits extend through the hollows of superimposed or side-byside arranged blocks.
In illustrating one form of the invention, the electrical receptacle spans one wall of the block and since the receptacle is hollow, the interior of the receptacle forms a passage which extends through the said one wall, whereby electrical conduits, which are disposed within the hollow block, can be fished through the hollow of the receptacle for ready attachment to electrical equipment such as an outlet or switch to be housed by the receptacle.
Under certain circumstances, the block may be weakened somewhat by the substitution of the receptacle for' the material of the block. Therefore, preferably I provide for reinforcing the block by integrally molding a reinforcing member in the block which spans the opening and extends to such walls of the block that are laterally disposed with respect to the wall which carries the receptacle. This reinforcing member is, or members are attached to the receptacle and function as anchors for assisting in retaining the receptacle in its integrally molded position.
The reinforcing-anchoring member of the present invention, is provided with two hook portions and a shoulder portion. An opening is provided in a wall of the receptacle. The hole is of such diameter and the hooks and shoulder are so disposed, with respect to one another, that one of the hook portions extends through the hole and engages the inside of the wall of the receptacle at one edge of the opening while the shoulder engages the opposite edge of the opening and the other hook portion frictionally engages an outer edge of the receptacle. In this manner the reinforcing-anchor member can be readily attached to the receptacle without the use of tools.
Further objects and advantages will be apparent from the following description, references being had to the accompanying drawings wherein a preferred embodiment of the invention is illustrated.
In the drawings:
FIG. 1 is a fragmentary side view of a building block showing the present invention;
FIG. 2 is a fragmentary view of a building block, shown in section, the section being taken along line 22 of FIG. 1;
FIG. 3 is a top plan view of the electrical receptacle, part thereof being shown in section;
FIG. 4 is a top plan view of the reinforcing-anchoring member;
FIG. 5 is a side view of the anchoring member; and
FIG. 6 is a fragmentary sectional view taken on line 66 of FIG. 1, but on a somewhat larger scale.
Referring more in detail to the drawings, a fragment of the building block is shown at 20. This block is provided with one or more passages 22 and is herein shown as having two such passages which extend entirely through the block. This block may be formed of any suitable molded material such as cement, concrete, glass, or fired clay, etc. The block includes an end wall 26, a rear wall 28, a front wall 30, a wall opposite wall 26 (not shown), and a dividing wall 32. It is to be understood that when the word mold is used, such word also comprehends cast.
The front wall 30 is provided with a passage 34 which may be shaped in cross-section as a square, a rectangle, or having six facets, depending upon the type of receptacle which is to be placed therein. The receptacle herein shown for illustrative purposes only, is in the form of a rectangle and is indicated at 36, the top wall thereof being shown in FIG. 2 and the front being shown in FIG. 1. The receptacle includes two side walls 38 and 40, a top wall 42 and a bottom wall 44. Each of these walls is provided with inwardly extending flanges 46 at the front and rear, and the major parts of the front and rear are open. This receptacle is adapted to house an electrical element (not shown) such as a switch, an outlet connection or a terminal block.
The passage 34 extends entirely through the front wall 30 and the receptacle 36 extends from the front to the rear of the passage 34. The receptacle is integrally molded at the time that the block 20 is formed and molded so that the receptacle 36 forms an integral part of the block. The receptacle, being open at the front and back as shown at 48 and 50 respectively, provides a passage therethrough, through which electrical conduit may be fished and connected to the electrical element which is to be disposed within the receptacle. One of these conduits is shown in dash and dot lines in FIG. 6 and is indicated by the numeral 52.
As previously set forth, under certain circumstances the block 20 may be weakened somewhat by reason of the passage 34 in the front wall 30. Preferably the receptacle is formed of steel but could be formed of other suitable material such as plastic which does not have the structural strength of steel. Too, the passage 34 may under certain circumstances have to be relatively large to accommodate a relatively large receptacle. To compensate for the loss of strength in the block by the hollow of passage 34, I provide a reinforcing-anchorging member. In the preferred embodiment this anchoring member is formed of steel and is shown at 54. Preferably two of these members are employed, one at the top and one at the bottorn of the receptacle 36. Obviously more anchoring members could be employed if necessity so demanded.
Each of these anchoring members 54 includes a central section 56 and extending arms or bars 58 and 60. These arms are disposed in the same plane as the central section 56 and extend in opposite directions. The central section 56 of the member 54 is provided with a downwardly and forwardly extending ear 62 which is hereinafter referred to as a hook section. The central portion 56 is also provided with a second depressed portion 64 which extends rearwardly and provides a rearwardly facing shoulder 66. This depressed portion 64 is depressed approximately onehalf as much as the end of car 62 is depressed. Central seciton 56 is also provided with a rearwardly and down wardly extending portion 68 which also forms a hook portion.
The top wall 42 of the receptacle is provided with a hole 70. This hole receives the hook 62 of the member 54 and is of such diameter than when the hook 62 is extended downwardly through the hole with the upper edge thereof engaging the under side of the wall forwardly of the hole, the shoulder 66 abuts the rear edge of the hole 70, and the front side of the rear portion 68 frictionally engages the rear edge of the top wall 42. To fasten the member 54 to the receptacle 36, it is necessary only to extend the hook 62 through the hole and underneath the top 42, and then press forwardly and downwardly upon the member 54 so that it is in the position as shown in FIG. 6, the cover or member 54 being sufficiently resilient so as to be forced in position and held in position due to the engagement of the top side of the hook 62 with the under side of the cover, the shoulder 66 in engagement with the rear edge of the opening 70 and the rear portion 68 frictionally engaging the rear of the receptacle. It will be understood that a similar hole 70 is provided in the bottom of the receptacle and that the lower member 54 is held in position in the same manner as the upper member 54.
It will be observed, particularly from FIGS. 1 and 2, that the arms or bars 58 and 60 not only span the passage 34 but also span the passage 22, thereby tying wall 26 to wall 32. To further increase the tying action the bars 58 and 60 are each provided with an upwardly and down- Wardly extending ears 72, and these ears are preferably formed at the outer ends of the bars. Furthermore, to enhance the tying action these bars are provided with a series of holes 74 which receives the unset molded material and ties the molded material on opposite sides of the bars with one another when the molded material sets.
The rear portion 68 of the upper reinforcing-anchoring member 54 extends downwardly, and the same portion 68 of the lower member 54 extends upwardly. Each of these portions is threaded to receive a screw 76 by which a clamp 78 is secured in position. These clamps are arranged to retain the conduits 52 in position after they have been fished from the passage 22.
The central portion of the flanges 46 at the front of the receptacle extends inwardly sufficiently to provide ears 80 which receive screws for attaching a cover plate (not shown).
The electrical receptacle is of the standard type, in which stanadrd snap acting switches or terminals may be installed. It occupies no more space than the standard electrical receptacles. The sides, top and bottom are closely and intimately embraced by the concrete in the molding of the concrete. The steel receptacle may be of such character that it in itself supplants the strength of an area of concrete equal to the area occupied by the receptacle, however, I prefer to add reinforcement as previously described.
From the foregoing it will be seen that I have provided a building block in which the electrical receptacle is molded integrally therewith, thus eliminating the necessity of the electrician spending valuable time in chiseli-ng holes in building block, the inserting of the receptacle in such hole, and thereafter filling the space about the receptacle. Too, such former practice weakened the building block. I have not only provided for dispensing with the time usually expended by the electrician in chiseling the hole, inserting the receptacle and filling the space about the receptacle, but I have also provided a reinforced wall to compensate for any loss of strength which may occur by reason of the passage for the receptacle. The reinforcing bars not only provide for reinforcing the wall but also provide anchoring means for enhancing the anchoring of the receptacle in the wall, since these anchoring means are also molded integrally with the block.
While the form of embodiment herein shown and de scribed constitutes preferred form, it is to be understood that other forms may be adopted falling within the scope of the claims that follow.
1. A building block including:
(A) Walls forming a passage;
(1) one of said walls having a passage disposed transversely of and in communication with the first mentioned passage;
(B) walls forming an electrical receptacle disposed in the second mentioned passage, said receptacle being open at the front and rear providing access to the first mentioned passage, one of said walls of the receptacle having an opening;
(C) a member for reinforcing the block in the area about the second mentioned passage, said member including:
(1) a depressed hook portion extending through the said opening in said wall of the receptacle and below that portion of said wall which forms one edge of said opening,
(2) a shoulder portion abutting the edge of the wall of the receptacle forming the opposite side of the opening,
(a) arms formed integrally with and extending from opposite sides of the section and integrally molded in the block on opposite sides of the second mentioned passage.
2. A building block as defined in claim 1, characterized in that said section includes:
(3) a second hook portion frictionally engaging an outer edge of said wall, of the receptacle, one of the two first mentioned portions being interposed between the other of the first mentioned portions and the second hook portion.
3. A building block as defined in claim 2, characterized in that the shoulder portion is disposed between the hook portions.
References Cited by the Examiner UNITED STATES PATENTS 848,917 4/07 McElligott 263 1,836,408 12/31 Sutton 50l27 1,845,760 2/32 Murray 50l27 1,854,314 4/32 Ryan 50l27 1,878,573 9/32 Arnold et a1 50l27 2,027,784 1/36 Page 50l27 2,079,478 5/37 Bashe 50474 2,262,127 11/41 Wolf 50l27 HENRY C. SUTHERLAND, Primary Examiner,