US1071239A - Concrete step. - Google Patents

Description

J. .H. T. KIRK & L. J. LAWSON.

CONCRETE STEP. APPLICATION FILLED MAY 1, 1912.

1,071,239. Patented Aug. 26, 1913.

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COLUMBIA PLANOGRAPII C0., WASHINGTON, n. c,

UNITED snares rn'rnn'r oFFion JAKOB H. T. KIRK AND LAURITS J LAWSON, OF WOBURN, MASSACHUSETTS.

CONCRETE STEP.

To all whom it may concern:

Be it known that we, J AKOB H. T. K111i: and LAURITS J. LAWSON, citizens, of the United States, residing in VVoburn, county of Middlesex, and State of Massachusetts, have invented an Improvement in Concrete Steps, of which the following description, in connection with the accompanying drawings, is a specification, like letters on the drawings representing like parts.

This invention relates to a concrete step and has for its object to provide a concrete step, which is light, inexpensive, durable and portable, whereby the step can be made as a stock article and transported to the job ready to be laid, without the necessity of skilled labor and without the use of the ordinary forms.

The invention further has for its object to provide a concrete step having a non-slipping tread surface, whereby serious accidents may be avoided in bad weather.

These and other features of this invention will be pointed out in the claim at the end of this specification.

Figure 1 is a side elevation of a flight of concrete steps embodying this invention. Fig. 2, a plan of two of the steps shown in Fig. 1, and Fig. 3, a detail to be referred to.

Referring to the drawing, (1 represents a portable concrete step embodying this invention, and comprising a body portion having an oblong tread surface I), a riser 0 at right angles to said tread surface, an inclined rear surface d and substantially oblong side arms 6 extended rearwardly beyond the rear edge of the tread surface 72. The inclined rear surface cl extends downwardly from the rear edge of the tread surface toward but not to the bottom of the riser 0, so as to leave a bottom surface 10 of substantial width. The tread surface I) may be provided with one or more antislipping devices 12, and in the present instance a single device is shown, which may be a piece of wood of substantial thickness, which is laid in the concrete while the latter is in plastic condition, with its upper surface flush or substantially flush with the-concrete portion of the tread surface.

The side arms 6 are made of sufficient length to afford a firm bearing for a superimposed step, which is laid with the rear edge of its bottom surface 10 flush with the rear edge of the tread surface I) of the next lower step, so that the inclined rear walls d Specification of Letters Patent.

Application filed May 1, 1912.

Patented Aug. 26,1913.

Serial No. 694,592.

of a plurality of steps are in substantially the same inclined plane and form a practically continuous rear wall for the series or flight of steps. The bottom surface 10 is made of sufficient width to extend over the tread surface I) of the next lower step, so as to have a portion of the lower step of material thickness support the upper step and yet leave a tread surface of ample or desired width. The side arms 6 of the superimposed steps may be supported upon filler blocks 15 of substantially the same thickness as said arms and of such length as will enable them to be conveniently handled and as required to close the space between the steps and the piazza or wall of a building.

In practice, the individual steps are designed to be made in the shop or factory in suitable molds, and are transported to the house or building, where they can be set up in a substantially short time by unskilled labor and in a minimum time, as the necessity of building forms at the job and the presence of skilled labor in erecting the forms and making the steps on the job are avoided, thereby materially diminishing the cost of steps of this character. The rearwardly extended arms of the individual. steps afford the desired or necessary bearing or supporting surface for the step resting upon them, which permits the body portion of the step to be made light so as to enable the step to be readily handled and transported to the job while materially reducing the cost of concrete steps.

We have herein shown one construction of portable step embodying this invention, but it is not desired to limit the invention to the particular construction shown. If desired, the bearing arms 6 of the steps may be provided with iron pins 17, which project above their upper surfaces and enter sockets 18 in the under surface of the arms a of the step resting on the lower step. Furthermore, the body portion of the step may be provided with one or more holes or sockets 19 extend ed from the inclined surface at to still further lighten the step. When the flight of steps is composed of many steps, the filling blocks 15 are employed, but in cases where only two or three steps are used, the side arms a may be made long enough to extend to the piazza or wall of the building.

Claim.

A portable one-piece concrete step comprising a body portion having a tread sur-' face, a user, an inclined rear surface eX- tended downwardly from the' rear edge of names to this specificatidn in the presence of the tread surface toward but not to the lower edge of the riser to form a bottonr surl face of substantial Width, and side arms eX- tended rearWardly beyond the upper edge of said rear surface and having their outer surfaces substantially rectangular in shape 10 to form a part of side Walls of the stairs when the latter are eoniposed of a series of said steps substantially as described.

In testimony whereof, Wehave signed our two-subscribing Witnesses.

JAKOB H. T. KIRK. LAURITS J. LAWVSON. Witnesses:

JAS: Hl CHURCHILL, J. MURPHY.

Copies of this patent may be obliai iie'd for'nve cents each, by addressing the Commissioner of Patents, Washington, If. (1.

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