US1918336A - Pavement marker - Google Patents

Description

July 18, 1933. HORN! 1,918,336

PAVEMENT MARKER Filed Jan. 2, 1930 ATTORN EYJ Patented July 18, 1933 UNITED STATES PAUL P. HORNI, OF NEWARK, NEW JERSEY PAVEMENT MARKER Application filed January 2, 1930. Serial No. 418,088.

This invention relates to pavement markers of the type used for marking traflic lanes and cross-walks at intersections.

Markers of the type described have come 9 into recent popularity but as at present constructed, are subject to numerous disadvantages. One type now employed comprises a circular head of dished form provided with projecting points along the perlphery. TlllS marker is placed on the pavement and pressed into position with the points entering the pavement, but the marker soon becomes loosened and dislodged because of insufficient anchorage. In another form, the top comprises a fiat disc of cast iron or the like, provided with a cover plate of more expensive metal, such as Monel metal. The head has an anchorage in the form of a boss havlng flaring prongs adapted to be driven into theasphalt. This construction is subject to the d1sadvan tage that the cover plate wears through and becomes unsightly and the marker cannot be employed in a pavement made of cobblestones, or the like, because of the large hole that must be drilled in order to receive the flaring prongs. Also, in both markers of the type above described, the upper surface is smooth and the marker thus is slippery and presents a danger to pedestrians.

The present invention is accordingly directed to the provision of a marker which overcofnes the difiiculties above referred to and the new marker is so constructed that it may be firmly anchored in position and tends to remain rigidly fixed in the pavement for in definite periods. The marker is provided with a non-skid top surface which lasts for an indefinite period and the top of the marker does not wear through since the head is of solid metal.

For a better understanding of the invention, reference may be had to the accompanying drawing, in which I Fig. 1 is a sectional view partly in side elevation of the new marker;

Fig. 2 is a sectional view on the line 2-2 of Fig. 1;

Fig. 3 is a fragmentary bottom plan view, and

Fig. 4 is a top plan view.

Referring now to the drawing, the marker is illustrated as consisting of a head 10 preferably of a durable metal of attractive appearance, such as Monel metal. This head is of slightly domed configuration and is so shaped with a downwardly directed peripheral flange 19 that there is a cup 11 formed in its lower surface. and a shoulder around its outer edge. lts upper surface has a plurality of channels 12 formed in it and if desired, the channels may be arranged to spell out the name of the manufacturer, or the like. The channels serve to roughen the upper surface and prevent slipping thereon.

Formed integrally with the head and extending downwardly from its under surface is a boss 13 in which is anchored a pin 14 of suitable metal, preferably one that is somewhat softer and more yielding than that of which the head is made. I have found brass to be suitable for the purpose. This pin is formed with corrugations or the like 15 at its upper end and is preferably inserted in the mold during the casting of the head, so that as the metal is'poured into the mold and the boss formed, the pin is rigidly anchored in the boss. The pin projects downwardly the desired distance and at its lower end is cut away to form inclined converging sides 16 giving the end a wedge shape. Formed as 30 extensions at either side ofjthe pin adjacent the wedge-shaped end are wedges or barbs 17. These wedges have inclined outer faces 18, and all three faces of each wedge are widened from the bottom toward the top. Formed 35 integrally with the pin and disposed above the upper ends with the wedges 17 are similar wedges 19 offset from the wedges 17 by When a marker of the type described is to 90 be set in the pavement, it is placed in the desired ositi on and pressure applied to force the pin own into the asphalt. As the wedges 17 enter the asphalt, they tend to spread it apart but the asphalt so displaced is restored to position above the tops of the wedges 17 by the action of the wedges 18. The marker is driven down until the circular rim 19 of the plate comes in contact with the asphalt and enters the latter to a slight extent. The

asphalt enters the chamber 11 in the under surface of the head to some extent and an interlock is thus formed between the marker and the asphalt, which assists the pin in holding the marker firmly in position. The marker projects slightly above the pavement, but by reason of its flattened configuratlon and the non-skid top formed by the channels 12, it does not cause pedestrians to slip.

In markers to be used for cobblestone or similar pavement, the pointed pin is formed from end to end with a corrugated construction illustrated at 15. In anchoring such a marker in position, an opening is drilled into the cobblestone, the pin inserted in the opening and the opening around the pin filled with grout. When the grout sets, the pin is firmly held in position and the marker anchored against dislodgment. A sleeve of rawhide or other soft material may be inserted in the opening in the cobblestone to serve as an anchorage instead of the grout, the sleeve being placed in position before the pin is inserted. In a marker for use in this type of pavement, it may be desirable to lengthen the boss to a slight extent to provide additional strength, the boss entering the opening in the cobblestone and thus improving the anchorage.

What I claim:

1. A pavement marker, comprising a head, a stem thereon having a wedge-shaped tip, a pair of wedge-shaped barbs located on opposite sides of said stem adjacent the tip thereof for displacing the material into which the marker is driven, and a second pair of wedgeshaped barbs located on op osite sides of the stem above the first pair 0 barbs and offset laterally on the stem with respect-thereto for displacing the material laterall into the spaces formed by the first pair 0 barbs, the lower edges of said second pair of barbs terminating substantially in the plane of the upper edges of the first pair.

2. A pavement marker, comprising a head, a stem thereon having a wedge-shaped tip, a pair of Wedge-shaped barbs located in opposite sides of said stem adjacent the tip thereof for displacing the material into which the marker is driven, and a second pair of wedgeshaped barbs located on opposite sides of the stem above the first pair of barbs and offset laterally on the stem with respect thereto for displacing the material laterally into the spaces formed by the first pair of barbs, the upper edges of said barbs being substantially fiat and extending substantially perpendicular to the stem.

1 PAUL P. HORNI.

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