US1811653A - Door spring - Google Patents

Description

Jn 23, 1931. H. L. SCHWARTZ ET AL 9 5 DOOR S PRING Filed Feb. 25, 1930 Patented June 23, 1931 ,UNITED STATES PA NT OFFICE EENRY L. SCHWARTZ, CARL A. QUAST, AND IGUIS SPITZ, OF 'L'VIILWAUKEE WISCONSIN noon SPRING .Application filed. February 25, 1930. Serial No. 431,104.

This invention pertainsto door springs, and has primarily for its object to provide a simple, nexpensive, and efiicient device of this character, in which the spring action is '5 reduced to a minimum, thus efiectively closing the door without eXcessive slamming.

A further object'reside's in the provision of a door spring which acts as a gradual check and positive stop to limitthe outward movement of the door, thus preventing banging against the wall of the building with resultant damage to the door.

A further object resides in the provision of a device of the foregoing character, which is adapted to normally lay parallel to the door within the confined width of the door casing so as not to interfere with the use of double doors hinged upon opposite sides of the casing.

Incidental to the foregoing, a more specific object resides in the provision of a pair of spring-urged arms pivotally connected to a door and casing, respectively, and having their floating ends connected by means of a link.

A still further object resides in the provison of a pair of attaching brackets adapted to be secured to a door and casing, respectively, for either right or left operation, and

each having pivotally connected thereto, a spring-urged arm, the floating ends of said arms being connected by a link, whereby a gradual check and positive stop is provided for the opening movement of the door, thus relieving excessve strain upon the parts and preventing thedoor from swinging outwardly against the wall, and also enabling the door to be releasably held in open position by forcing the arms slightly past center.

i With the above and other objects in view, which will appear as the description proceeds, theinvention resides in the novel construction, combination and arrangement of parts substantially as hereinafter described,

and more particularly defined by. the 'appended claims, it being understood that such changes in the precise embodiment of the herein dsclosed invention may be made as come within the scope of the claims.

In the accompanying drawings is illus- .face of the door.

trated one complete example of the hysical embodiment of the present invention constructed according to the best mode so far devised for the practical application of the principles thereof. i

In the drawings, Figure 1 is a fragmentary section of a door and casing with the present invention applied thereto, the same being taken 'looking upwardly at the top of the casing;

Figure 2 is a similar view'illustrating a door in open position; a

Figure 37 is a transverse section taken on the line 3-3 of Figure 1; and

Figure 4 is a detail section taken on the line 4-4 of Figure l. 3 5

Referring now more particularly to the accompanying drawings, thenumeral l designates a conventional casing to which is attached' a swinging door 2 provided with a j conventional hinge 3, the door being hung to Swing outwardly with relaton to the casing, as illustrated in Figure 2.

A pair of brackets ;4 and 4' are secured to the casing and door, respectively, at a position outwardly from the hinge, and as best shown in Figure 3, each bracket is provided With Wings extending 'at right angles to each other to permit attachment of the device to doors swinging in either direction, thus eliminating the necessity of providing two different structures of brack'ets.

In the arrangement illustrated, the vertical wing of the bracket 4' is secured to the door by the screws 5, while the horizontal wing of the bracket 4 is secured to the top face of the door casing lby screws 6. Were the door to swng in the opposite direction, the method of attachment would simply be reversed, and the horizontal wing of the bracket 4' secured to the top of the casin g 1, and the vertical wing of the bracket 4 secured to the inner Pivotally secured to each of the brackets 4 and 4' is an arm 7 having pivot'ally secured thereto an offset finger 8 for attachment ofone end of the contractile spring 9, the opposte end of each spring-being secured to ears ,10 proj ectingfrom the brackets 4 and 4' The j outer or fioating ends of thearms 7 are connected by pivotal links 11 which compensate for the different movement of the arms 7 with relation to their attaching brackets.

In attaching the present invention, the brackets 4 and el' are Secured to the casing and door outwardly from the hinge 3, and the arms 7 extend away from the hinge substantially parallel to the door in their normal position, thus enabling the device to be attached within the confined width of the door casing l, which permits the use of double doors hinged upon the opposite sides of the casing as, for instance, where it is desired to augment the regular door with a storm door.

In operation, as the door is swung outwardly, it will be obvious that the arms 7 will be caused to Swing upon their pivots away from the spring anchoring ears 10, thus gradually increasing tension upon the springs 9, which serve as a check to gradually retard opening movement of the door as it reaches the limits of its travel determined by alignment of the arms 7 as shown in Figure 2. It will be readily seen that tension is equally distributed upon both springs and because of the relatively small movement between the arms 7 and the spring anchor ears 10, minimum action of the springs is required, thus avoiding excessive tension upon the springs, which retards the movement of the door when the same is released and requires minimun effort for the opening operation.

hen the door is swung open with relation to the casing, it will be readily apparent that the springs 9 will be gradually extended, thus serving as a gradual check upon the outer movement of the door, and as the door reaches that position where the arms 7, through their link connections 8, are aligned, a positive stop is afl'orded, which will prevent the door from slamming into an adjacent wall or obstruction with resultant damage.

In the event that it is desired to maintain the door 2 in open position, the same is readily accomplished by forcing the arms 7 slightly past center, as indicated by dotted lines in Figure 2, after the door has reached the limit of its outward movement. In this position of the arms 7, the springs 9 are so closely algned with the pivotal centers of the arms G as to be inefl'ective, and thus the door will be releasably maintained in this position. To eflect closing, it is merely necessary to swing the door outwardly again, bringing the arm 7 into alignment, after which the springs 9 function in their normal nanner to efiect closing of the door.

Obviously, as the door is released, the springs 9 will gradually contract to swing the arms 7 upon their brackets and return the door to closed position, and while this is accomplished by contraction of both springs, in some instances where the device is used upon a light screen door, which requires less spring tension to effect the closing, either one of the springs may be taken ofi and the closing operation efiected by the remaining spring.

From the foregoing, it will be seen that a very simple, inexpensive and efiicient door spring has been provided which permits operation of the door with a minimum effort, and in addition retards the movement of the door to such an extent that it reduces to a minimum slamming and sudden stopping of the door, as well as serving to pcsitively limit its outer movement to prevent banging against a wall or adjacent obstacle.

Due to the fact that the members secured to the door and the casing are identical in structure, one set of dies is suflicent to form both, thus materially reducing cost of manufacture.

Also, as heretofore explained, the device may be attached to a door and casing to compensate for movement of the door in either direction relative to the casng, and because of the compactncss of the device, and its method of attachment, the same can be employcd in confined spaces, such as between two doors hinged to the opposite sides of the casing.

We claim:

1. A device of the character described comprising a pair of angular brackets connected to a door and door casing rcspectively, an arm having its one end pivotally connected to the horizontal portion of each bracket, a link pivotally connecting the other ends of said arms, apertured ears carried by the other angle of said brackets, and coil springs having one end connected to the apertured ears and the other end connected to the arms adjacent their ends which are pivotally connected. 4

2. A device of the character described comprising a pair of brackets connected to a door and door casing respectively, an arm having one end pivotally connected to the normal horizontal portion of each bracket, a link connecting the other end of the arms, an apertured ear on the other angle of each bracket, an offset aperturedfinger carried by each arm adjacent the pivoted connection and coil springs having one end connected to the apel-v tured ears and the other end connected to the apertured fingcrs for normally urging said door toward a closed position.

In testimony that we claim the foregoing we have hereunto set our hands at Milwaukee, in the county of` hilwaukee and State of Wisconsin.

HENRY L. SCHWARTZ. CARL A. QUAST. LOUIS SPITZ.

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