US1911720A - Mold for making traffic markers - Google Patents

Description

y 30, 1933. w. s. SHERMAN 1,911,720

MOLD FOR MAKING TRAFFIC MARKERS Filed March 13 1929 INVENTOR.

;,/2/ W EEHEPmEm Q a S r ATTORNEYS.

Patented May 30, 1933 UNITED STATES WARREN s. SHERMAN, or OKLAHOMA CITY, OKLAHOMA 7 v p MoLi) FOR MAKING This invention relates to improvements in molds for making signs, traffic markers, and likeindicating devices.

V The primary object of this invention is the provision of an improved mold for making street markers such as set forth in my U. S.

Patent No. 1,785,602 dated December16, 1980.

@ther objects and'advantages of this invention will be apparent during the course of the m followingdetailed description.

2 In the: accompanying drawing, wherein for :the purpose of illustration are shown forms of the improved mold.

Figure 1 is'a fragmentary plan view of a preferred form of mold, showing improvements to hold the mold letters detachably therein in a definite relation, the view being taken substantially on the line 11 of Figure mi Figure 2 is a sectional view taken through the mold structure substantially on line 22 of Figure 1.

Figure 3 is the mold of Figure 2, showing the pattern members in position after the pouring of the slab cement.

Figure 4 is a view of the mold of Figures 1 and 2, with the slab cement in place and the pattern letters withdrawn, leaving the empty pockets in place of said letters.

Figure 5 is a view of the mold of Figure 2, with the slab frame pockets filled with lett-er forming contrasting cementitious material.

Figure 6 is a fragmentary longitudinal sectional view taken through a mold used to east the cementitious frame, showing a modified arrangement including means for holding pre-cast letters, which are formed in accordance with my above Patent No. 1,785,602, in place during the pouring of the cementitious frame forming material.

In the drawing, wherein similar reference characters designate corresponding parts throughout the several views, the letter A. may generally designate the mold for casting the slab or frame. It includes a bottom having upstanding end walls 21 and opposite side walls 22. The inside surfaces 23 of said end and side walls slope inwardly and downwardly in a converging relation toward Application filed March 13,

Mam amt-e TRAFFIC aenimas 1929. Serial No. eraser.

the bottom 20. Said bottom isprovidedwith an inside marginal groove 2 f peripherally surrounding the inside of the mold atthe base of the wall surfaces 23. Thisprovides a central raised portion 25 upon the inside of the bottom wall 20, which forms the inset face for the cementitious sign or. slab which is pre-cast and adapted to be used in the en; vironment set forth in my above identified I?! S. patent. The said mold A at the oppo s te end walls 21 is provided with upwardly eiitendinglugs 27,- which are apertured and to which the upwardlyangled ends 28 of a longitudinally extending horizontal bar 29 are bolted as by bolt means 30, in a detachable relation. The horizontal bar 29 extends across the top of the mold and is provided with screw threaded openings 31 therein at spaced intervals therealong, adapted to ad'- justably receiveclamping screws 33.

Prior to assemblage of the bar 29 upon the mold casing, in the position described, precast letters B, in the form of invention shown in Figure 6 ofthe drawing, are positioned in properly spaced relation inside of the mold A and clamped upon'the raised portion 25 of the bottom 20, by means of the adjustable clamping screws 33,'as is shown in Figure 6 of the drawing. Said letters B are pre-cast in accordance with the method set forth in my U. S. patent above referred to, and when held in clamped relation by the screws 33 upon the bottom 20, the cementitious material,to form the slab',-is poured in a fluid condition into the mold A and permitted to settle, and is then leveled off flush with the exposed upper surfaces of the said pr'e-cast letter B, as shown in Figure 6, and permitted to harden in this relation.

The cementitious material forming the finished slab, shown at G in Figure 6 of the drawing is of any approved nature, contrast. ing in color with thecolor of the insert let-. ters B, for an obvious purpose.v NVhen in 5 the mold the exposed surfaces of the letters B andslalo C represent the back of the finished marker. The slab. C, as thus formed,has the marginaledgesthereof sloping in a divergi ng-relation from the face thereof, which is 100 inset by reason of the recess made by the raised portion 25 of the mold bottom.

The relation of the marker as to details and its mounting is better set forth in my 5 U. S. patent above identified.

In the other method of forming the marker, which may be the preferred construction, the slab is pre-cast with pockets which subsequently receive the material forming the contrasting letters in the slab. Under these conditions pattern letters D are used, as shown in Figures 1, 2 and 3 of the drawing. The letters D are of the shape and characteristics set forth in my U. S. patent above referred to, and as shown said letters D as well as the precast letters B have the side surfaces thereof sloping in a converging relation from the back of the letters toward the faces thereof; the-back of said letters, of course, being those faces which are expesed in the mold during the formation of the slab.

As shown in various figures, the pattern letters D are preferably provided with screw threaded sockets 35 in the backs thereof, outletting on the back faces of said letters, which are the exposed faces during formation of the slab. These screw threaded sockets 35 permit the insertion of the screw threaded shanks of the clamping screws 33, and prevent any transverse shift of the pattern letters, I); when they are once positioned, for the purpose .of holding them in place during the pouring of the cement-itious material which forms the slab. The pattern letters has been poured and leveled off and allowed to harden, are readily withdrawn. It may be.

preferred to grease or otherwise render them suitable for withdrawal prior to pouring the cementitious material. The pockets 37 which are left upon the withdrawal of the said pattern letters D, as shown in Figure 4, are in acondition to receive a contrasting cementitious material, which is poured in said 43 pockets and permitted to harden. Of course, the pattern letters D are clamped upon the raised portion of the bottom 20 of the mold, frame, so that the contrasting cementitious material after filling the pocket 37 will show on the front inset face of the finished slab.

Various changes in the formation of the mold. may be made to the forms of invention shown and described, without departing h from the spirit of the invention or the scope of, the claims.

I claim: 1, In a mold for making traffic markers and the like the combination of a mold box having a compartment therein, mold members resting on the bottom of said. box, lugs extending upwardly from the end walls of after the slab forming cementitious materialthe arms inwardly of the lugs, and means carried by said bar for positioning said mold members within said compartment, whereby said arms in addition to their ordinary function may support the corner portion of the bottoms of two superimposed mold boxes in stacked relation with the surface of the material within the mold boxes exposed during curing of the material and for ready inspection thereof. 2. In a mold for-making trafiic markers andthe like, the combination of a mold box having a compartment therein, mold members resting on the bottom of said box, lugs extending upwardly from the walls of said box, a bar spanning said mold boxand' provided with a pair of upwardly extending arms, one at each extremity ofsaid bar, said arms having substantially flat, free ends, means securing said arms'to sai'd lugs with 85 the armsinwardly of the lugs, and means car-Y. ried by'said-bar for positioning said mold members within said compartment, whereby said arms in addition to their ordinary function may support the corner portions of the bottoms of two superimposed mold boxes in stacked relation with. the surface of thema terial in the mold boxes. exposed during curing of the material and for ready i11- spection thereof.

WARREN s. SHERMAN.

said box, a bar spanning said mold box and 1 provided with a pair of upwardly extending I arms having Substantially flat free ends, 65 means securing'said arms to sa1d lugs with

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