US1958807A - Doorstop - Google Patents

Description

Patented May 15, 1934 UNITED STATES PATENT OFFICE 3 Claims.

The invention relates to door stops or checks, by which doors may be readily secured in open or partly open position, and particularly to wedge-shaped rubber stops for this purpose.

5 This stop is of circular, or approximately circular form and is provided with a flat bottom and a yielding conical or rounded top. The outer edge of the stop is made thin enough to pass beneath the ordinary door, while the center is thicker than the distance usually found between the iloor and the bottom of the door; so that the edge of any part of the stop will pass beneath the door, while the central part Will rise above the bottom of the door, thus causing the door to 'L come to rest at some point on the surface of the stop between the margin and the center.

The object of the invention is to provide what is in effect a circular or substantially circular resilient rubber stop, which shall be wedgeshaped from the periphery toward the center, so that the thin edge will readily pass beneath the door in whatever position it may be placed upon the floor, and the Wedging action will become effective in any and all positions.

Certain other features of construction will be more fully understood from the details of the description.

In the drawings:

Fig. 1 is a perspective View of a door with my improved stop lying on the oor and extending beneath the door, thus holding the door in open position.

Fig. 2 is an enlarged top plan view of the stop shown in Fig. 1.

V Fig. 3 is a sectional view of the stop, taken on the line 3 3 of Fig. 2.

Fig. 4 is a plan view of a somewhat modied form of stop.

Fig. 5 is a sectional View of this modification Vprojecting beneath a door, and showing how the soft material of the stop is distended or displaced 1n use.

Referring to the drawings, the form of the invention shown in Figs. 1, 2 and 3 will be rst 'jdescribed The character 10 designates the body of the stop. As shown it is represented as being circular or substantially circular in outline. The outer edge 11 is made comparatively thin, while the central part 12 is made much thicker, thus `giving the whole structure the eiect of a circular wedge.

As shown in Fig. 1, the stop is lying on the iioor, with one edge extending beneath a door, which is here represented by 13.

5g The configuration of the top of the stop may assume any one of several shapes. It may constitute a true cone; or it may be a true curve of a sphere; or the surface from the margin to the central part may assume what is known as a reversed curve. The exact cross sectional form is c@ not of the substance of the invention, it being essential only that the outer margin be sufliciently thin to pass beneath the door, .While the central portion shall be so thick that preferably this part will not normally pass beneath the door.v

As here shown, the body of the stop is provided With a plurality of openings 14. These holes enable the user to insert the lingers and thus readily grasp the body of the stop. These holes as here made are substantially perpendicular to the upper surface, thus passing through the body in an inclined direction, so that a better hold may be obtained than would be possible if the holes went vertically through the mass.

It is preferable that these holes pass entirely through the stop so that dirt and dust will not be held therein.

As here illustrated the top of the stop is serrated or roughened in accordance with any preferred design; but it is to be understood that this roughened surface is not of the essence of the invention, and may be omitted if desired.

In the modification shown in Figs. 4 and 5, the body of the stop is again represented by 10', the margin thereof by 11 and the central portion by 85 12. A door 13 cooperates with the stop. The finger openings 14 are identical with those shown in Figs. 1, 2 and 3, and serve the same purpose as the finger openings of the preferred form.

The stop shown in Figures 4 and 5 differs from 90 that shown in the other figures only in the general configuration of the top of the stop. This is here illustrated as having what is known as a reverse curve formation; that is, starting from the edge of the disk the top surface assumes first a concave form and then a convex form, thus giving a holloWed. out effect near the edge, and a higher center with a rounded top.

Moreover, the top surface of this form of the invention, instead of being merely roughened or serrated as in the form shown in Figs. 1, 2 and 3, is provided with annular concentric grooves 15. As here illustrated these grooves extend from the outer margin to near the center of the stop. This arrangement makes annular raised portions 16 105 between the depressions upon which the door may catch and hold.

Referring to Fig. 5, it will be observed that the edge of the door deiiects the mass of the material more or less, as shown for instance at 17, thereby partially embedding itself in the mass of the rubber of which the stop is made.

The bottom of the stop shown in Figs. 1, 2 and 3 is flat; but in the form shown in Figs. 4 and 5, the bottom is roughened as at 18, so that the stop may better adhere to the floor.

The stop is molded from rubber, or some rubber composition which will satisfactorily answer thev purpose. This composition may vary more or less, depending upon the exact use to which it is to be put. For ordinary household purposes, the body should be of rubber which is comparatively soft, so that the door may deect the mass of the ma terial within certain limits to obtain a binding or wedging action. For some purposes, however, a stiffer composition might be preferred.

The stop being circular or substantially circular in configuration with the thickened portion in the middle of the body, it can readilybel wedged' beneath the door by simply placing the stop upon the'floorv and forcing it beneath theA door in any position in which it happens to fall. Ir'rother Words, it becomes in effect acircular wedge, which is bound to function in every position. Aivvedge of the usualshape must be somewhat carefully placed with the thin edge beneath the door; but with my improved stop, no particular placing of the same is necessary; itswedging action becomes effective under all conditions;

By the terms circular and substantially circular, as used herein, I do not mean to specify an exact geometrical gure of this shape; but the terms are intended to cover all forms and shapes which comprise a more or less continuous narrow edge and a thicker center.

Having thus explained the character and nature of the invention, What I claim is:

1. A door stop comprising a body of resilient material having a flat bottom `ada-pted to rest upon the floor, a cone shaped top adapted to cooperate with a door, and nger openings extending through the body by means of which the stop may be grasped.

2. A door stop comprising a body of resilient materialhaving a roughened bottom to rest upon the oor, a cone shaped top with Which the door `is adapted to cooperate, and nger openings extending diagonally through the body from the top to the bottom thereof by means of which the stop maybe grasped;

3;',Avdoor' stop comprisnga body. of resilient materialhav-ing arbottom adapted to rest upon the floor, a: cone shaped top adapted, to be engaged bythe bottomV of a door, andnger openings extending into the body by which the stop may be` engaged;

GUSTAVUS yW. THOMPSON.

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