US2894310A - Adjustable device for relating faceboard of curb mold to backobard thereof - Google Patents

Description

' July 14, 1959 E .1-:. HOGAN ETAL 2,894,310 ADJUSTABLE DEVICE FOR RELATING FACEBOARD oF CURB MOLD To BACKBOARD THEREOF Filed June 27, 1957 Marl.'

rraA/EK I United States Patent i ADJUSTABLE DEVICE FOR RELATING FACE- BOARD F CURB MOLD T0 BACKBOARD THEREOF Eric 1E. Hogan and Robert S. Malloch, Riverside, Calif.

Application June 27, 1957, Serial No. 668,543

1 Claim. (Cl. 25-118) This invention relates to the art of assembling mold boards for forming a mold to cast a concrete curb and particularly to quickly demountable devices for relating the faceboard of the mold to luhe backboard thereof.

It is a particular object of the invention to provide such a device which may be readily employed to set up a mold `and then to disassemble the latter without the use of any special tools.

Itis another object of the invention to provide such a device which will accommodate itself without adjustment to faceboards varying substantially in breadth.

Devices of this character are generally made to support the faceboard in a given angular relation with the backboard of the mold. Thus an entirely ditferent set of such devices is required where there is a change in this angle.

It is a further object of the invention to provide a device for relating the faceboard of a curb mold to the backboard thereof which is readily adjustable so that these devices may be set to give the desired angle between the faceboard and the backboard of the mold on any particular job in which these devices are used. v

Board spacers heretofore employed extend directly across the top of the mold and thus offer some interference with the operations of the man finishing the upper face of the curb.

It is yet another object of the invention to provide such a board spacing device which will not interfere substantially with the operation of finishing the top surface of the curb.

The manner of accomplishing the foregoing objects as well `as further objects and advantages will be made manifest in the following description taken in connection with the accompanying drawings, in which:

Fig. l is a fragmentary plan view of a curbmold in which a preferred embodiment of the invention is shown properly relating the faceboard to the backboard of the mold.

Fig. 2 is a vertical sectional view taken on the line 2 2 of Fig. 1.

Fig. 3 is an enlarged fragmentary vertical sectional view taken on the line- 3 3 of Fig. 1 and illustrating the reverse face of the adjusting means of the invention.

Fig. 4 is a sectional detail view taken on the line 4 4 of Fig. 3.

Referring specically to the drawings, the invention is illustrated therein as comprising a board spacing device which is employed in relating the faceboard 11 of a curb mold 12 to the backboard 13 of said mold.

In the mold 12, the backboard 13 is always placed in vertical position on a graded surface 14 of the soil 15 on which the curb is to be erected. After the surface `14 has been graded and the backboard 13 placed upright in its proper position thereon, as shown in Fig. 2, "a stake 16, which is preferably a steel rod of -about three-quarter inch diameter and pointed at the lower end', is driven into the soil 15 to lie directly CC i back of the backboard 13 and in aligned contact with said board throughout the full height of the latter.

The device `10 is then placed over the upwardly extending end portion of the stake 16 and lowered onto the upper edge of backboard 13 as shown in Fig. 2. This device includes a stake clamp 20 having a U-shaped body 21, the latter being provided with aligned horizontal apertures ZZ for receiving Ia shaft 23, one extending end of which is bent to form a handle 24 and the other extending end of which carries a. head 25 which retains shaft 23 in place. This shaft is slightly bent so as to have an eccentric binding action 'when rotated as will be made clear hereinafter. A lock-bar 26 vent to form a long leg 27 and a short leg 28, is disposed within the U-shaped body 21 and has a keeper strap 29 welded thereto to form a loop through which shaft 23 extends, thereby retaining lock-bar 26 assembled on said shaft.

Welded to the front wall 34 of the body 21 is the lower end of a vertical leg 35 of an inverted U-shaped spacer bar 36, the other leg 37 of which extends at an obtuse angle downwardly to a point just above the upper edge of the faceboard 11 when the latter is properly positioned in the mold 12. The lower end of the leg 35 rests on top of the backboard 13 andis provided with a nger 34 which is welded thereto and extends downwardly to overlap the upper front corner of the backboard 13, as shown in Fig. 2.

Pivotally mounted on the lower back corner of the spacer bar leg 37 is a Ifaceboard jig 38. This jig includes a jig base 39 which comprises a vertical plate welded at its lower end to one edge of a faceboard jaw 40 which is adapted to embrace the upper edge of faceboard 11 as shown in Fig. 2. Welded to the opposite edge of the jaw 40 is a short metal bar 41 which cooperates with the plate 39 to :form a shallow channel into which the lower end of the spacer bar leg 37 tits as shown in Fig. 3.

When tihe leg 37 is thus related with the jig 38, a holel 42 formed in said leg is aligned with corresponding holes formed in the plate 39 and bar 41 and a bolt 43 is extended through these holes so as to pivotally mount the jig 38 on the spacer bar 36 on the yaxis of these holes. Group of holes 50 and 51, and group of holes 52 and 53, are also formed in the leg 37 with the holes of each group located at different radial distances from the axis of bolt 43 as clearly shown in Fig. 3. Holes 50 and 51 are formed `at radius 54 from said axis while holes 52 and 53 are `formed at radius 55 therefrom.

Also formed in jig base plate 39, at radius 54, is a holev 56, Iand at radius 55 is a hole 57. A bolt 58 is provided which is adapted to be extended through the hole 56 and either one of the holes 50 or 51 in leg 37; or bolt 58 is adapted to be extended through hole 5'7 and either one of the holes S2 or 53 in leg 37. The holes 50 and 51 are so related to the hole 56 and the holes 52 and 53 are so related to the hole 57 that this combination of holes provides an opportunity to set the spacer bar 36 relative to the jig 33 so that the latter will relate faceboard 11 in any one of four precise angular relations with the backboard 13 depending upon which combination of holes bolt 58 is inserted through. When the bolt 58 is thus inserted through any pair of holes provided in the jig base 39 and the spacer bar leg 37, a nut 59 is set on said bolt so as to rigidly unitethe spacer b-ar 36 with the jig 3S with the latter in the angular relation exclusively produced by this particular combination of holes.

Welded to the -front edges of the jig base 39 and jaw 4t) is a faceboard guide tube 65. The upper end of this tube is disposed below the upper end of jig base 39 and the lower end of this tube terminates at a point above the lower edge of the faceboard 11. An oil hole 66 is provided in tube 65 for introducing oil. Slidably and rotatably mounted in the tube 65 is a rod 67 having a Patented July 14,r 1959` lower faceboard grippingv jaw 68 bent from the lower end thereof. The rod 67 extends upwardly from the upper end of -tube 65, where it has a series of spaced holes 69,formed, therein; through one oi which av Cotter.` 70 is insertedfon trapping a. coil: springg71, surrounding.

the rodl 67, between, said Cotter. and the upper end'` of tube 65.. After the-11od 67 hasthus been assembled toextend throughthetube 65 and-t spring 71', an upper. endy portion 73 of, saidt rod isV` bent.. therefrom. to form a` handle.

, Operation.

Whenr the device i ismoved downwardly over the= stakei16, asfshown in1 Eigsl 1i andi 2, the1stakef extends. through'- the enclosedfi space 75 vprovided within the-A UL,

stakewith` spaced sharp cor-ners directly engaging thelatter; Theverticalldimension of. thebody 21 is approxi-f mately 1% inches: and` when theI clamp.- 20 is: positionedon: stake 16 as; shown: inFigs 1 and` 2' andi the handle 24 turnedl tofrotateA the shaft 23". to4 eiecty an eccentriclike binding, action against the lock-barV 26, the sharp cornersof the: latten yare pressed against the stake 16v tolock.' the'vlatter'in a1 vise-.like grip against the frontwall 3'4of the body 21; This'` actionunites` the body 21 withl the stake'- 161 soy as to practically prevent any rotation; of the' devicev 101 relative to the stake 16 in the.,

jigfibaser39 to cause.y the faeeboard: 111 to be given they properV angular relation withfbackboard IS-Whenlthe face- Iboard-111iis:assembledin the-jig 38. 'Iheilatter srtepris ac complished in,I thezfollowingi manner.

With thestakeclampsA 20 rigidly locked on the stakesl 176 as above described, they faceboard 11 is lifted by the mold assembling crew= andthe lower edge ofV the faceboard isl rested ony thejaws: 68, which areV turnedV toward `thisrboardrin'the samedirectionthey are shown asy disposed in Eig. 2'.r The board-11i is-nowpressed downwardly -to'cornpressthe'spring 7.1 until= the upperiedge of the faceboardv 112 lieszbelow the upper jaw 40foffthejig 38. The aceboardfl'l is ynow-rocked 1 towards and into ush contact with the guide tube 65 whereupon downward pressure on: theeboard4 1211' iscrelaxed; allowingthe springs 71'-, of` thevarious-devices` 101in the mold? 12, to liftJ the faceboard" 11y untilits upper ed'ge` reposes in the upper jaw 40:01?. the jig. as shownf in Fig: 2.

With the mold'thus-i-assembl'edlit is readyfor` thepouring,I of1 concretez which: lls the space within` themoldV upto the broken'` lines 802 and 81, it being the commonpractice to) simultaneously cast a" curb and gutter as an integralsstructure. When the concrete thus cast has setV suiciently toretain itslform, and:V this tak-esfplace inaI relatively` few minutes, the mold 12 may lbedisassembled- Toxdo'this,I the crewmembers walk alongthe mold,

pressingffdown.manually onL the handle 73 ofeach of the devices 10 soaszto compress-its-spring 71 and lower the jawf68tout ofcontact-with the Ibottom edge of the faceboard: 11, whereuponthe crew member rotates'the rod' the springsV 71"l yto liftwth'e t jaw 6.8i above the concrete, surface 81. The crew member now turns the handle 24 of j the stake clamp 20 in a reverse direction from that in which it was turned to set the clamp on the stake 16, thereby relaxing the hold of the clamp on the stake and permitting the lock-bar 26 to be pushed upward and backward so that it hangs down from the shaft 23 out of operative contact with the stake 16. The device 10 is now, completelyfreed from the v yfaceboardl 11, backboard 11i-and stake^16` and may beV lifted directly upward, off of said stake.

The devices 10, thus removed,V are free to be trans; ported immediatelyV to an advance' section of' the curb molding'l job andre-employed in setting upyanf extension of the mold 12.

While only a single preferredI embodiment of the invention has been disclosed herein lit is to be understood that various changes and modifications may be made in Ithis without departingrfrom thev spirit ofthe, invention or the scope of the appended claim.

The claim is:

An adjustable device for optionally fixing., theA face board of a curb mold in: any one. of a` plurality of precise angular relations with the backboard of'said mold,4 said device comprising: asteel stake drivenY vertically, a, substantial distance into the soil, whenA in use, inrflush, contact with. `the back` face ofrsaid backboard, a portion of said stake extending above said backboard; ay stake? clamp having a vertical opening for receiving saidup wardly extending portion off said stake. and manually operative to grip4 saidV stake sotightly as tojvrender the, clampV immovable relative to saidl stake;, al spacer` Vhat? integrally unitedY with said clamp and-v extending; there?. from to a horizontal line parallel with said backboardr and disposed just above the upper edge of-y saidgfaceboard when the latter is located infany of said precise.relationsl with said backboard; means on said device -forengaging said backboard to holdv the latter against saidstakeg al jig for gripping said faceboard, saidy jig including, a bodyP providing a guide againstrwhich anv outer face o said; faceboard rests when the latter isheld in; said) j ig a jaw` integral with said body against which anupperf edgeof said faceboard rests when.; the latter is held: in said; jig, a lower jaw shiftably provided on said, body and manually operable means on saidy jig for; shiftingg; said lower jaw between a position awayI frombeneath; saith faceboard and a position therebeneath, andthenftoward;V said faceboard to clamp the same between saidijaws,said;l meansv then retaining saidn yfaceboardi so clamped; pivot means for pivotallyuniting'saidr jig bodyand-'said spacer-5. bnr on said horizontal line; `and plural`r adjustmentV hole; and bolt means for optionally uniting said jig bodyto; said spacer bar in any one of a` pluralityy of precise angular rotational positions about said,l line relative; to,y said bar, eachfofsaid positionsicausing said-:iig torholdi said aceboard in a particular one of said precise angular,T relations with` said. backboard.

References Cited. inthe tile` of. thislpatent` UNITED` STATESv PA'lTElI'l'iSv 1,628,316' Heltzel May 10; 1927'n 1,643,578: Eatonret al Sept; 2,7, 19,27 2,180,842 Winding Nov. 121321939* 2,342,440 Whitsitt Feb.r 22; 1944 V2,610,660, lenningsV etial; SeptzV 16, 1952' 2,688,174 Hogan Sept; 7,' 1954'" 2,704,390?` Hummel' Mar. 22; 1955?

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