Патент USA US2114328код для вставки
April 19’ 1938. J. F. BARTON. CONCRETE KEY STRIP SUPPORT Filed July 19, 1937 \\\\\\\\\\\\\ \\\\ 2’114,323 Patented Apr. 19, 1938 I 2,114,328 UNITED STATES PATENT OFFICE 2,114,328 CONCRETE KEY STRIP SUPPORT James Fred Barton, Edwardsville, Ill. Application July 19, 1937, Serial No. 154,366 6 Claims. This invention relates to certain new and use ful improvements in concrete key strip supports, the peculiarities of which will be hereinafter fully described and claimed. In concrete road making, a slab is laid on one half the width of the roadway and a “V-strip” is supported against the form forming the center of the road so as to leave a longitudinal groove (Cl. 25-118) My support for the key strip consists of a ?at metal bar in the form of a strap, one end 4 of ‘ which is laid into the ‘face of the key strip so as to be ?ush therewith, and then is bent over the top down the back side, forward under the strip, GI then down in the same vertical plane‘ as the end 4 forming a vertical leg 5 about half the slab thickness, or long enough to allow an outwardly projecting foot 6 to be driven at right angles under the form as indicated in Figs. 1, 2, and 3. 10 in the edge of the slab to provide a key for the Various means for supporting such a key strip while the con - A ?at head bolt passes through the-end 4 and the crete is poured and being rammed have been em back strap to hold the enclosed strip ?rmly by a ployed in the prior art, such as hanging it from nut ‘l. a'goose neck mounted above the form; another The key strip'is thus ?rmly held and supported 15 ‘ with pronged nails; and another bolts to the midway of the proposed thickness of the slab and form. rests on the shoulder 8 of the strap, so that the '10 other half slab when it is laid. My invention provides for setting the key strip after the grade is ?nished and offers a ?rm sup port for the key strip, which support does not extend above the form and is not liable to inter ference by the power graders and planer, nor while pouring the slab; my key strip is ?rmly sup ported against the inner face of the adjacent form without connecting bolts, is maintained in proper position while the concrete is being rammed; and is readily disengaged from the slab after the concrete has set, with little or no dam age to the key strip or its support, so that it pro motes continual use of the key strip with resultant economy. In the accompanying drawing in which like reference numerals indicate corresponding parts, Fig. 1 represents a perspective view of a con crete slab with a form and key strip in place, and my improved support ready for removal of the strip after the concrete has set; Fig. 2 an enlarged view of a portion of the same; Fig. 3 a plan view showing a portion of a form .10 partly in section, a key strip having my support, and a stake in section below the prong, holding the strip close to the inner face of the form ready for pouring and ramming the concrete; Fig. 4 a side view of my stake and its prong; Fig. 5 a back view of the same; and Fig. 6 a top view of the stake. strip will maintain its position while the concrete is being rammed above and below it.. The upper end of the strap support may be otherwise formed in connection with the leg, and secured to the key strip in any suitable manner. ‘ ' The foot 6 under the form (see Fig. 3) holds the leg and strip from rising, and the foot also supports them from the ground while the con crete is beingrammed above and below said strip. As a further assurance of the strip remaining 1 in contact with the inner face of the adjacent form while the concrete is being poured and rammed, I provide a stake 9 having a beveled point II and a lateral prong ID near its top that engages the top of the support or otherwise, when driven into the ground adjacent the key strip. The beveled point ll causes the stake, when driven, to incline toward the key strip and press it against the face of the form, while the prong assists the foot 6 in holding down the strip. The preferred form of said stake is shown in the drawing and consists of a curved semi-cylin drical stake with a beveled point H and lateral prong l0 formed by punching outward a portion I, of the back as indicated in Figs. 4, 5, and 6. The prong may be otherwise formed. The open side of this stake ?ts over the nut ‘l and is guided thereby while being driven down Referring to the drawing, the numeral I indi Ward until the prong engages the strap surround ing the V-strip, or otherwise, and when thus em bracing the nut ‘! the stake is held against dis cates a slab of concrete as laid for half of the width of the road having a form 2 at its inner placement sidewise. The strip and the leg of the support being edge and wooden key strip 3 (commonly known as a V-strip) for forming a longitudinal groove in the inner edge of the slab. Said groove is ?lled by the concrete when the adjacent slab is poured and keys the two slabs to gether on the center line of the road. 1.; Cl thus held close to the inner face of the form, are _ not separated from it by any concrete getting down between such faces in contact as above described. Therefore, when the concrete has set and the form is removed, the key strip and my support therefor, is exposed as shown in Figs. 1 2,114,328 and 2. It is common practice in other forms of key supports, to drive a chisel or crowbar into the key strip in order to pry it out of its groove. My method provides a better way in which the in key strip is preserved in its undamaged condi tion. In the foot extending from the bottom of the leg of my support, I provide a hole l2 which is exposed to view upon removal of the form as 10 above stated. A pointed rod inserted in this hole 12, allows of springing outward the leg and V strip secured to the top of the support without actual contact of any chisel or crowbar with the strip itself. By such means as I have just de scribed, the wooden key strip is preserved in un-' damaged condition for continued use.v The metal stake I have described, being driven below. the surface of the concrete slab remains in its posi tion as set in the concrete and is not subject to removal. As stated above, the stake assists the foot 6 in holding down the key strip and the prong supplements the foot 6 in maintaining the key strip in proper position against the inner face of the adjacent form. _ Having thus fully described my invention, what I claim as new vand desire to secure by Letters Patent, is: , ' 1. The combination with a wooden key strip, of a support consisting of a ?at metal bar bent at its upper front end to embrace said strip and 30 let in flush with the outer face of said strip, and vided with a hole for disengaging said support and key strip from the set concrete, substantially as described. 3. In combination with a key strip for con crete slabs, of a metal support secured by its up per end to said strip and having a leg extending downward having its outer face in the same ver tical plane as the outer face of said strip and having a foot extending outward to be disposed ,under an adjacent form to support said strip 10 from the ground, and a stake to be driven adja cent said strip to press it against an adjacent form and having a lateral prong to hold down the key strip, substantially as described. 4. In combination with a key strip and a sup 15 port therefor having a leg the lower end of which is adapted to engage the ground and having its upper end secured by a bolt through the strip with a nut on its rear end, of a semi-cylindrical stake embracing said nut and guided thereby when driven into the ground adjacent said strip to press said strip against an adjacent form. 5. In combination with means to support a key strip for concrete slabs, of a stake having a beveled point adapted to slant the stake toward ~25 the key strip while being driven into the ground, and having a lateral prong near its upper end adapted to engage and to hold down said strip and limit the depth driven, substantially as de scribed. ,; 30 6. The combination with a form for a con- ' then over the top, down behind, and under the crete slab and a key strip disposed against the strip, and then extending downward in the same inner face of the form, of a concrete strip support vertical plane as the said upper front end form consisting of a supporting bar adapted to be se—. ing a leg, and having a right-angled foot extend ing outward to be disposed under an adjacent _ cured to said strip and characterized by a verti-r 35 cal leg having its outer face disposed substantially form and support said strip from the ground. 2. The combination with a concrete key strip in the same plane as the inner face of said form of a support secured at its upper end to said strip and extending downward to form a verti cal leg the outer face of which leg is in the same and having at its lower end an outwardly pro jecting foot adapted to rest on the ground and plane as said strip to allow the strip to contact with an adjacent form, and having a right-angled foot extending outward at the grade surface pro tially as described. support said key strip, in said position, substan JAMES FRED BARTON.