US1055888A - Automatic door-check. - Google Patents

Description

E. F. DEXTER.

AUTOMATIC DOOR CHECK.

APPLICATION FILED SEPT. 14, 1911.

Patented Mar. 11, 1913.

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WITNESSES ERNEST F. DEXTER, OF HARTFORD, CONNECTICUT.

AUTOMATIC DOOR-CHECK.

Specification of Letters Patent.

Patented Mar. '11, 1913.

Application filed September 14, 1911. Serial No. 649,297.

To all whom it may concern.

Be it known that I, ERNEST F. DEXTER, a citizen of the United States, residing at Hartford, in the county of Hartford and State of Connecticut, have invented certain new and useful Improvements in Automatic Door-Checks, of which the following is a specification.

The present invention relates to an improved brace or check which is adapted to be applied to a bulk head, door, or similar swinging closure for the purpose of automatically retaining the same in an open position.

One of the objects of the invention is to provide an automatic door check which can be readily applied to any swinging closure, and which will operate in a positive and reliable manner to retain the same in an open position without placing anyundue strain upon the hinges andwithout interfering with the opening and closing of the swinging closure in the usual manner.

A further object of the invention is to provide an automatic door check which is comparatively simple and inexpensive in its construction, which comprises few and durable parts which are not liable to get out of repair, and which may be easily and quickly placed in position or removed therefrom, as may be desired.

With these and other objects in view, the invention consists in certain novel combinations and arrangements of the parts as will more fully appear as the description proceeds, the novel features thereof being pointed out in the appended claim.

For a full understanding of the invention, reference is to be had to the following description and accompanying drawings, in which Figure 1 is a transverse sectional view through a door having the device applied thereto, the door bein shown in an open position. Fig. 2 is a similar view with the door in a closed position, portions being broken away. Fig. 3 is a top plan view of the automatic door check, the parts being shown in the position assumed when the door is closed, and Fig. 4 is an enlarged sectional view on the line 44 of Fig. 1.

Corresponding and like parts are referred to in the following description and indicated in all the views of the drawings by the same reference characters.

Specifically describing the present embodiment of the invention, the numeral 1 designates the casing or support to which the door or swinging closure 2 is hinged. This door may swing in either a vertical or horizontal plane, and the automatic door -check serves to hold the same in an open position so that it will not swing accidentally into a closed position, although the door can be forcibly closed at any time when such becomes desirable.

In carrying out the invention, a base plate 3 is secured to the frame 1 at a point adjacent to the hinged edge of the door, the said base plate being held rigidly in position by suitable fastening members such as the screws 4, and being provided at one of its longitudinal edges with an outstanding flange 3 which is arranged at substantially right angles to the axis of the door. A swinging arm 5 has one end thereof pivotally connected to the flange 3 at a point intermediate of the ends thereof by a suitable pivot member such as the bolt 6, the opposite end of the said swinging arm being pivotally connected at 7 to one endof a; rod 8. This rod extends along the door when the same is in a closed position, the opposite end of the rod being pivotally connected at 9 to an outstanding ear 10 upon a plate 11 which is suitably fastened to the door by screws 12.

The arm 5 is adapted to swing either toward or away from the door upon the bolt 6 as a pivot, the said arm assuming the position shown in Fig. 1 when the door is. opened, and the position shown in Fig. 2 when the door is closed. In the former position, a longitudinal slot 13 is frictionally engaged by an angular nose 14 at the upper end of a spring strip 15 which has the lower end thereof extended outwardly and secured to the base plate 3 in some suitable manner as by means of the screws 16. The nose 14 is inclined in opposite directions so that the arm 5 can be forcibly moved for the purpose of closing the door, although it is held securely against accidental'displacement. When the door is opened, the arm 5 is swung from the position shown in Fig.

'2 to the position shown in Fig. 1, When the spring catch engages the slot or notch 13 and the door is held securely against accidental closing. The swinging of the arm 5 in opposite directions is limited by the engagement thereof with the base plate 3, and the rod 8 forms a brace between the arm 5 and the door for holding the door against obvious that when a sufficient amount of force is applied to the door for the purpose of closing the same, the arm 5 can be readily drawn out of engagement with the spring catch without the necessity of manually releasing the spring catch or otherwise adjusting any of the parts. When the arm 5 is swung inwardly and the door is closed, as indicated by F ig.'2, the rod 8 extends along the back of the door, and the line of thrust passing through the pivot points at opposite ends of the rod is inclined outwardly away from the pivot bolt 6 of the arm so as to avoid a dead center; In this connection, it will be observed that the pivotal connection 7 between the rod and the arm is located at one side of the longitudinal axis of the arm, so that the said pivot is spaced farther from the surface of the door than the pivot bolt 6 is from the frame 1, the extremity of the rod 8 being bent laterally at 8 so as to throw the rod inwardly toward the door when the latter is closed.

The door can be opened in the usual manner, the thrust upon the rod 8 merely tending to swing the arm 5 away from the door until it reaches the opposite limit of its movement. and again abuts against-the base plate 3.. :The spring catch then engages the slot or recess 13 so as torhold the arm yieldingly in position, while'the rod 8 serves as a braceto hold the door against swinging movement. In this manner the door can be retained in an open position without the necessity of any posts or projections upon the floor or wall, and an excessive strain is never placed upon the hinges. The door can be forcibly moved into an open or closed position in the usual manner, although there is no danger of a sudden wind or the like accidentally closing the door at an inoppor tune time.

Having thus described the invention, what I claim as new and desire to secure by Letters Patent, is

In a door check, the combination of a support, a swinging closure hinged to said support, a base plate secured to said support and formed with a flange projecting at right angles therefrom, an arm having one end thereof pivoted between the ends of said flange and being provided with an inclined recess intermediate the ends thereof, a rod connecting the free end of said arm to said swinging closure, a spring catch mounted on said base plate and being provided with a beveled nose adapted to engage the inclined recess of said arm to hold the swinging closure open against accidental closing.

In testimony whereof I aflix my signature in presence of two witnesses.

ERNEST F. DEXTER.v

Copies of this patent may be obtained for five cents each, by addressing the Commissioner 0! Patents,

Washington, D. C.

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