US2448953A - Door holder - Google Patents

Description

Se t. 7, 1948. BLAcKMoN noon HOLDER Filed April 5, 1945 ENocH JBLACKMON INVENTOR.

BYMM

ATTORNEY Patented Sept. 7, 1948 UNITED STATES PATENT DOOR HOLDER Enoch J. Blackmon, Sherman, Tex.

" I Application April 5, 1945, Serial No. 586,730f 2 Claims. (01. 1e-ss) This invention relates to new and useful. improvements in door holders.

One object of the invention is to provide an improved device adapted to be applied to a door frame and connected with a door for causing actuation of the door to closed position.

An important object of the-invention is to provide a door holder of the character described which is so arranged that it will restrain the door in an open position when said door is opened past a right angle with the door'frame or casing.

A further object of the invention is to provide a door holder having resilient means for causing actuation of the door and wherein the actionot the resilient means is snubbed or resistediby.

air suction means incorporated in the. holden-ia.

A particular object of the invention, is to'pro vide an improved door. holder wherein the ;ac,. tuating mechanism is so pivoted with respect--to the door frame and door that therforce exerted byythegactuating means normally acts. to urge the door'to closed position, but when the door is. opened past; a; predetermined angle such meche; anism actsto hold the door'open; v

. Another. object of the invention :is

struction andwhichmay be readily attached to substantially any type or size of door for causing actuation thereof."

Additional obiects and advantages pithe invention will be apparent'froin the' reading of the following description of a device constructed in accordance wi'th' the invention, and reference to the accompanying drawings thereof, wherein;

Figure '1 is a View, in elevation, oil a device con structed in accordance withgthe inventioni a'nd showing the same in operative' position. on a door and door frame,

Figure 2 is an enlargedview, partly in elevation and partlyiin section, of'ithe door holder mechanism, and s l Figure 3 is .an enlarged isometric viewer-the holderplatev i In the drawings, the letter A designates anangular holder plate adapted to be secured at one end to a door frame by screws or other suitable means and having a pivot opening located centrally of its outer end. The opening is positioned in a plane extending through the door hinges and vertically of the door frame.

An elongate cylindrical housing D is pivotally connected at one end to the holder plate by means of a hinge bolt B so as to be swingable in a horizontal plane. The pivoted end of the housing is closed by a cap C, which may have a lubricated :provl de door holder which is simple in design andcon- 13v packing 1 (not 'shown l secured thereto for lub'ri eating the hinge' bolt -B.""The free end of the housing is also provided with a capmember E having an axial opening" therin'throughwhich an elongate reciprocating" rod" F extends 1 into the hou'singx-rm sis" I: :1.

A helical' coiled spring J surrounds the rod F Withii'ith'e housing and has one end secured 'within an opening 'in the wan of "the housing near the cap memberE. The other end of the spring is fastened to the reciprocating rodat a'- projection I near its inner-endias cieanyshown in Figure 2. It will be seen, therefore, that the spring exerts its tension to constantly urge the rod outwardly from within the housing; I The projection I on the" reciprocating rod',"by*"means -of which the spring is 'connected to"thereciprocatingrod; is preferably a; nutthrea-d'ed onto the end ofthe rod and adjustable longitudinally'thereon, wherebytlie tension of the spring J may -be adjusted and controlled to increase or decrease the I force applied to the reciprocating rod by said spring: An'i 'angular stay member G i is secured to the upper swingingendof the door-by "screws or other 'suit able" means; and: has an opening in its horizontal=-portion Y for receiving a hook provided at theouterl end of the-reciprocating rod F." The length of' theYrod -F issuchthat the springfi' is .placedunder slight tension" when the -door is i It will readilybe I seen that, since the pivoted end-ofQthe housing-is swingable about a'point locatedrsome distance horizontally from the 'surface of the doorywhile the: swinging hook end ot the rod F 'is connected' rather closely to the -sur-= face .Of the door; the spring pressed: rod F acts at an anglewith flrespectto -the surface-of the door. and tends 'to constantIy urgethe door to closed'positionz a: m Further; "since the pivot point I for the housing Datthebolt-1B ispositioned nearer the pathof swing of the Y stay member G'tlian is .the axis aboutiwhich the-door swings as His swung: open, therodfFwill be forced-"inwardly into the hous ing D as the door is opened and will place the spring J under still greater tension. Therefore, when the door is released the spring will act through the rod to move the door toward closed position. Such motion is assured by the angle at which the housing, spring and rod act on the door, such angle being determined by the horizontal length of the holder plate A.

From the foregoing, it will be seen that if the door is swung open past a plane at right angles with the door frame, the force impressed upon the spring will cause the rod to ur e the door toward further open position, since the angle of application of force to the door is reversed when the door passes a plane vertical to the door frame. The improved door holder can therefore be utilized to urge the door toward either an open or a closed position.

For snubbing or resisting the action of the spring J, the reciprocating rod F is provided on its inner end with a a'cking washer or piston H, which is secured to the rod by means of nuts threaded thereon, or in any other suitable manner. The piston H engages the inner Wall of the bore of the housing as the rod is reciproeated therein and, since the pivoted end of the housing is closed by the cap C, the suctioncreated-within the housing as the piston moves away from the closed end will operate to slow or check the action of the spring urging the door closed.

Obviously, the door holder may be manufacturedin sizes and styles to suitsubstantiallyapy type or size of door'd-esired. Also, it *will be seen that-the deviceis simple in construction-and may be economically manufactured without the use of complicated machinery.

The foregoing description of the invention-is explanatory only, and changes in the details of the construction illustrated may be made by those skilled in the art, within the scope of the appended claims, without departing from the spirit of the invention,

What I claim and desire to secure by Letters Patent is:

1. A-door holder including, a holder member adapted to be secured to a door frame and project horizontally therefrom; a vertically disposed pivot member at the outer end of the holder member spaced from the surface of the door frame and lying in a plane extending through the door hinges vertically to the-plane of the door frame, an elongate tubular housing swingably secured at one end to the pivot-member and swingable through an arc of approximately 180 degrees thereon, an elongate reciprocating member telescoping the housing and adapted to have its outer end pivotally secured to the free side of-a door, a helical ooiledtension springcompletelyenclosed in the housing and surrounding the inner portion of the reciprocating member and having one end secured to the housing adjacent the outer swinging end thereof, a-spring connecting and adjusting member threadedonto the inner end of thereciprocating member, the other-end of the-elongate helical coiled tension spring being secured to said spring connecting member under tension whereby the spring resists further telescopic movement'of the reciprocating member into the housing'and normally urges the reciprocating member outwardly from within the housing, the connecting member' being adjustable on the reciprocating member for adjusting the force exerted by the spring, the pivot element on which the housing is swingably mounted being spaced fromthe plane of the surfreely with respect to the housing to permit the door to swing through an arc of approximately 180*degrees.

2. A door holder including, an elongate tubular housing, a. plunger bar telescoping said housing and its outer end adapted to be pivotally connected to the free side of a door, a helical coiled tension spring completely enclosed within the housing and surrounding the plunger bar, said spring being secured at one end to the outer end of the housing, an adjusting nut threaded onto the inner-end of the plunger bar and having the other end of the spring secured thereto so that the spring normally urges the bar outwardly of the housing, said-nut being adjustable to vary the force exerted by the'spring, means for connecting the projecting outer end of the plunger bar to a door, a holder plate adapted to be secured to a door frame and project horizontally therefrom and having an upright pivot pin at its outer end positioned in a plane extending vertically from the door frame through the door hinges, said pivot pin having the inner end of the housing pivotally secured and freely swingable in a horizontal plane thereon, the telescopic movement of the plunger bar into the housing terminating short of engagement of the bar with the inner end of the housing whereby the door'may be swung through an arc of approximately 180 degrees and the spring will act upon the plunger bar to urge the door toward open position when the door is swung open in excess of 90 degrees, said spring acting upon'the bar to urge the door toward closed position when the door is swung open less than 90 degrees.

ENOCH JACKSON BLACKMON.

REFERENCES CITED The following references are of record in the file of this patent:

UNITED STATES PATENTS Number Name Date 306,351 Porter Oct. 7, 1884, 476,932 Shrawder June 14, 1892 678,790 Nushawg et al July 16, 1901 1,247,274 Hoferle Nov. 20, 1917 FOREIGN PATENTS Number Country Date 232,811 Germany Mar. 22, 1911 453,119 France Mar. 23, 1913

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