US825918A - Sidewalk-block-molding machine. - Google Patents

Description

PATENTED JULY 17, 1906.

A. P. MELI'ON. SIDEWALK BLOCK MOLDING MACHINE.

APPLICATION FILED AUG. 18. 1905.

2 SHEETS-SHEET 1.

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, A. P. MELTON. SIDEWALK BLOCK MOLDING MACHINE.

APPLICATION FILED AUG. 18. 1905.

2 SHEETS-SHEET 8.

U W/M UNITED STATES PATENT OFFICE.

ARTHUR P. MELTON, OF MINNEAPOLIS, MINNESOTA, ASSIGNOR TO MIRACLE PRESSED STONE COMPANY, OF SIOUX FALLS, SOUTH DAKOTA, AND MINNEAPOLIS, MINNESOTA, A CORPORATION OF SOUTH DAKOTA.

Specification of Letters Patent.

Patented July 17, 1906.

Application filed August 18,1905. Serial No. 274.6 72.

To all, whom it may concern.-

Be it known that I, ARTHUR P. MELTON, a citizen of the United States, residing at Minneapolis, in the county of Hennepin and State of Minnesota, have invented new and useful Improvements in Sidewalk-Block- Molding Machines, of which the following is a specification, reference being had to the accompanying drawings, forming a part thereof.

The purpose of this invention is to provide an improved appliance for molding concrete blocks, particularly of the form suitable for sidewalk-building or like purposes requiring blocks having one finished face of large area relatively to the thickness of the block.

It consists of the features of construction set out in the claims.

In the drawings, Figure 1 is a side elevation of a machine embodying this invention, showing the laten-carrier elevated and the molded bloc thereon ready for removal. Fig. 2 is a top plan view of the same with the platen removed. Fig. 3 is a section at the line 3 3 on Fig. 1. Fig. 4 is a section at the line 4 4 on Fig. 2. Fig. 5 is a detail section at the line 5 5 on Fig. 4. Fig. 6 is a detail section at the line 6 6 on Fig. 3.

This machine comprises a stand consisting of two side standards 1 1, each comprising two legs and connecting- webs 2 and 3, the former at the top and the latter nearer the bottom than the top. The two standards are connected by the X-shaped cross-frame 4, having its four terminals bolted two against each of the standards at the lower cross-web 3 of the latter. The standards are further connected by the top 5, which is a rectangular frame, said standards having suitable horizontal webs 1 at the top in the angle between the two flanges constituting the respective legs for bolts which take through said webs 1 and corresponding webs 5 in the angles between the vertical webs of said top frame at the four corners. The top frame 5 has in addition to its four sides a cross-web 6, which is T-shaped in cross-section and which connects two opposite parallel sides of the frame midway between the other two opposite sides. This cross-web is depressed at the middle point of its length and has at that point a boss 6 vertically-apertured to afford guide-bearing for a thrust-rod, hereinafter described, for lifting the platen. The opening, generally rectangular, in this top frame besides being interrupted by the cross-web 6 is further interrupted by four lugs 5 forming platenrests, which project two from each of the two opposite sides of the frame, which are connected by the crossweb 6 about midway be tween said cross-web and the other two parallel sides of the top frame, leaving the aperture of said latter frame uninterrupted at the four corners. Above the top frame 5 there is mounted an H-shaped spider or platenlifting frame 7, whose cross-bar 7 extends crosswise of the cross-Web 6 and has at the middle point of its length a boss 7, which is adapted to lodge directly above the boss 6 on a cross-web 6 and from which at its lower side a spindle or stem extends through the aperture of the boss 6, which thus becomes a vertical guide-bearing for said stem, which is also otherwise guided, as hereinafter mentioned, to hold the H-sha ed platen-lifter horizontal in lifting the p aten. The two side bars 7 7 of the H-shape'd platen-lifter 7 extend alongside the side bars of the frame 5, which are parallel with the cross-bars 6, and thus occupy at their four ends the four corners, respectively, of the generally rectangular aperture of the frame 5, the ends of said side bars 7 standing thus respectively alongside the four lugs 5 of the top frame 5, while said lugs or platen-rests project inward within the margin of the outermost supportingpoints of the lifter. Upon the upper surface of said side bars 7 at their upper ends are formed slightly-upraised bosses 7 the upper surfaces of which are substantially in the plane of the upper surfaces of the lugs 5 of the top 5 when the boss 7 of the H-shaped frame rests upon the upper side of the crossbar 6 at the central depressed point of the latter above the apertured boss 6*. Mounted upon the upper side of the top frame 5 is the mold 9, which is a four-sided rectangular frame open directly through from top to bottom, its purpose being to form the side walls of the cavity in which the concrete block is to be molded. For securing it on the top of the top frame it has exteriorly-projecting lugs 9,

and to adapt said top frame to support molds of different dimensions said top has at two opposite sides horizontally-projecting lugs 5 having a plurality-of bolt-holes 5 ,.adapted to correspond in position and register with.

the bolt-holes which may be formed through the lugs 9 of molds of different sizes.

8 is a platen, which may be of wood and of which a multiplicity willbe. employed inoperating the machine, oneto be used with each it while it is being cured and har- 5. Theuplatens will .ofcourse be made ofvaryingd-imensions corresponding to the vary,- ing sizes of the. molds, soas toform a complete bottom forthealatter, obtaining support at their end portions which extend beyond the-opposite parallel sides of the top frame by lodgment-upon the lugs 5 and which are up-v raised-so :as tobe ,level with the surface of the upraised-lugs 7 'of the H-shaped platenlifter'Z. For. operating the platen-lifter its stemor spindle 1O obtains guide-bearing by extend-. ingthrough the central boss 4* of the .X-- shaped cross-frame 4 and also, asabove men-.

tioned,.through the central boss-6 of the top frame. At its lowerendlsaidstem projects below the cross-frame {l and is pivotally-connectedtoa pedal-leverrll, which is pivotally connected bya link 12 with one arm ofthe X-shaped cross-frame 4, said armhaving a boss; 4 and1a lug 4 projecting alongside the boss-andthe link. 12rbeing entered between theyboss and the lug and there secured by av pivot-bolt."

13: is ;a pedal-piece. mounted .upon. the

swinging end-.of thepedal-lever 11, which, it

willbe noticed, extends ina plane approximately parallel to ,one of the diagonal arms ofthe- X-s'haped cross-frames 4 and emerges past one ofthe lugs'of one of the standards at one corner of the. machine, so .that it can be reached conveniently for operating the thrust-nod without being in the way of an operator standing, as is most convenient forthe.

purpose ofthe work, at either side of the ma.- chine, and thus making it possible for two or even fouroperators to assist in the. process of filling and tamping the mold, one standing at each of thefour sides, either of the two standing at the} 1 sides between which the pedal emerges at the corner, being in convenient po-, sition ,for. operating the pedal .when it is jde.

siredtolift the block from the mold..

The form- .of the platen-lifter as having two side bars and ,a connectingcross-bar,- leaving the other two sides-open and rendering it H. shaped, is designed to facilitate the lifting of .cessibleiat the underside except only at the points where the two terminal bosses 7? are supported. a 7o By'the construction of the platen-lifter and the top of the frame into which the platen recedes provision is made for easily clearing the parts of the machine from any droppings from the mold-box or any material which may accumulate under the platen. Inthis way-theplaten is adapted to seat itself firmly and-squarely on the frame, and by providing the inwardly-projecting. lug-sorplaten-rests at the points illustrated and .hereinaboveides, 8o scribed a large number. of. supporting-points g..- are .--provided.and distributed about equally; around the top of the frame ,.it being'a ndere stood that a firm'support. for the plateniis necessary, to withstandthe tamping-flof -the;;.8 5

: concrete .in the mo1.d,and prevent straining 1 C and operating it vertical y; and,horizontally; extendedplaten-supporting arms constitute; ing a skeleton support for. the. ,platen, the; platen carried on said skeleton support.adapt-, .,1o5 ed to form a bottom forthe mold-cavity, the apertured top of the standhaving its .apertures corresponding to the, arms of said skele ston platen-support. to. permit the latter to pass through the formerand being adapted to afford. lodgment' for. the platen -.at -the ,cle ppessed position to which it is lowered by the li ter- 3. A machine for the purposestated com prising arigid stand having an apertured -top ;.1 I 5 an open-bottomed mold mounted on thetop encompassing the, apertured portion thereof-g a platen-lifter andmeansformoving it ver tically through the mold,- said liftercompris-j ing. horizontally-extended ,arms forming a skeleton support fortheplaten, said arms;be-.- ing in position correspondingto theapertures of said apertured .top so. that;: they pass 1 through-said top .when the lifter .is depressed,.. the form of said apertures and skeleton being, I 2 5 such as to ,affordprojections from the. margin,;

of the apertures in the; top extending inward .platen-lifterhaving a ri idjstem forguiding,

the platen-lifter, whereby the platen is supported at its margins on the stand-top when at depressed position forming the bottom of the mold.

4. In a machine for the urpose stated, in combination with the mo d and the stand which supports it a platen adapted to form a false or movable bottom for the mold; a platen-lifter and means for moving it vertically through the mold, said platen-lifter having horizontally-extended armsforming an Hshaped skeleton platensupport, the standtop being apertured to permit said H-shaped lifter to pass down through the stand for lodging the platen on the top of the latter.

In testimony whereof I have hereunto set my hand, in the presence of two Witnesses, at Minneapolis, Minnesota, this 7th day of August, 1905.

ARTHUR P. ELTON.

In presence of O. W. MIRACLE, RAY TRAUTHAN.

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