US1578041A - Door-fastening mechanism - Google Patents

Description

Muchwza 192s. 1,578,041

F. KNowLsoN E'r m.

DOOR FASTENING MECHANISM Filed April 13, 1925 L l mllllifllllllbwllmlllw mmm mmm ATTORNEY.

Patented Mar. 23, 1926.

UNITED sTrEs I Y y .1,578,041 PATENT ortica.

FREDERICK KNoWLsoN Ann JOHN HUBER s'rnvnnson, or Ann Anson, lammeren.

:Doon-FASTENING 'Mncnnnrsn Application filed. April 13, 1925. Serial No. 22,736.

To y all -wLom t 'may concer/ni.'

Be it known that we, FREDERICK KnownsoN and JOHN HUBER S'rnvnNsoN, respectively, a subject of the King of Great Brit- 1 ain, and a citizen of the United States, resi,-

dents vof Ann Arbor, county of i/Vashtenaw,

State of Michigan, have invented a certain new and useful lniproveinent in Door-Fastening Mechanism, and declare the follow-l ing to be a full, clear, and exact description of the same, such as will. enable others skilled in the art to which it pertains to make anduse the same, reference being hadto the accompanying` drawings, which form a part of this specification.

Our invention relates to door fastening mechanism particularly adapted for swinging doors andis shownin connection with such a door. The mechanism is of such a character as to be automatically operable to releasably holdthe door at a `determined ope-n posit-ion. rlhe device is inexpensive-and is of simple, sturdy construction. Nhen the door has been opened to the determined position, the deviceA automatically operates to releasably retain the door at such open'position against accidental closing produced by a jar, shock, gust of wind, or .other external cause. W hen thedoor is tobe closed, it is first opened slightly'beyond the position at which it is held by the fasteninginechanism and this movementreleases the fasteningmechanism to pei-mitthe' closing of the door.

The above and other objects and advantages of our invention together with the de'- tails of construction will more fully appear Y' from the following description, accompanying drawing and appended claims.

In the drawings:

Fie. 1 is a fragmentary perspective of our invention in connection with a swinging door.

Fig. 2 is a fragmentary elevationof the locking mechanism at the initial engagement of the bumper sprin'.

F iO. 3 is a fragmentary elevation ofthe same locking mechanism in place to hold the' door in the open position.

Fig. 4C is a fragmentary same portion of the locking mechanism moved into positiontopermit the elosingof the door.

Fig. 5 is a fragmentary enlarged perspective of one end of the channel bar.

F i0'. 6 Vis aV longitudinal sectional view yed to engage the catch as shown in Fig. elevation of the.

taken through the fragment of the bar shown inFig. 5. 'y

. Our. invention is shown. in conjunction with a swinging door 10, which' door `is hinged in a door frame 12. The hinges are not shown in the drawing. ille provide a channel bar lei which is loosely pivoted/at one end to the door. There is a bracket 16 having spaced apart ears 1S between which the bar is pivot'ed by a pin 2O so as to have a free swinging movement in a. horizontal plane, and the connection is sufficiently loose tor permit slight Aswinging movement in a vertical plane. l f

vvWe provide a catch which is secured vto the door frame. This comprises aplate 22 which may be .screwed to the top ofthe frame by screws 24 and tov whichplate is swiveled a yoke 26 by means of a pivot pin 28. The two sides of this yoke are cut away to permit the bar 14 to travel freely therethrough as shownin the several figures. of

the drawing.

The bar beyond the yoke is provided with a coil spring 28. To hold the spring securely in placevand to permit of the easy assembly yand :disassembly of the mechanism, we provide a stop plate 30 adapted to surround the bai". Lugs or portions 32 are pnched out-from the sidesvand the top of the bar vas appears in Figs. 2, 3, and 6; l Plate BO abutsthese lugs 32 andvis held"securelyV upon thebar.

After the plate has been placed upon the bar, portions 3-1 are struck up from the sides `of the bar and the top on the opposite side of the plate and spaced therefrom. The coil spring 28 is then moved over the portions 34 so as to abut closely against the plate 30. The spring thereby is -held securely in position upon the free end of the bar beyond the catch 26. v

llife providel a dog 36 pivoted within the channel of the bar at 3S to hang normally downwardly as shown in Fig. l. This dogl is capable of swinging in either direction from its pivot point. lThe dog is provided with a projecting part 38 on one side adapt- 0. Then the door is opened the bar 1st travels through the yoke 26 of the catch until the dog 3 6 strikes against the side of the catch farthestremoved from the spring V28 asv shown in Fig. 2, which occurs at substantially the same instant as the spring 28 bumps against the opposite side of the yoke. The

further movement of the door is against the tension of the spring and continues until the projecting part 3S of the dog drops below the aperture through the yoke 26 as appears in Fig. 3, and the door is then held in the open position. The tension of the spring is such that the door is locked in such open position against any accidental movement which might produce closing of the door.

Vhen it is desired to close the door, it is first further opened a sufficient distance to trip the dog. After the dog has been tripped, the bar will travel freely through the yoke in the opposite direction.

What we claim is:

l. In a door fastening device, in combination with a door frame and a door hinged therein, a catch secured to the door frame, a channel bar pivoted at one end to the door, said bar mounted to travel over said catch in the opening and closing of the door, a dog pivoted within the channel of said bar to hang normally downwardly to be engaged by the catch as the door travels thereover and adapted to be raised up within the channel of the bar to permit the bar to travel over the catch, said dog having a projecting part adapted to engage said catch to prevent the closing of the door, a coil spring encircling the free end of the bar beyond the catch, a stop plate surrounding the bar beyond the spring, said bar having portions struclr up from the side walls thereof beyond the stop plate and portions struck up from the side walls of the bar on the opposite sides of the stop plate to hold the plate in place, said coil spring engaged over said last-named portions so as to be held against the stop plate.

2. In a door fastening device, in combination with a door frame and a door hinged therein, a catch swiveled to the door frame, a channel bar ypivoted at one end to the door, said bar supported bythe catch to travel thereover in the opening and closing of the door, a dogpivoted within the channel of the bar in proximity to the free end thereof, a coil spring surrounding the free end of the bar beyond said dog, said dog related to swing downwardly to engage the catch when the bar travels thereover and adapted to swing upwardly within the channel of the bar to permit the bar to travel freely over the catch, said dog having a part adapted to engage said catch during the opening of the door to prevent the return travel of the bar over the catch, a coil spring surrounding the free end of the bar, a stop plate surrounding the bar beyond the spring, said spring adapted to engage the catch upon the vtravel of the bar thereover prior to the engagement of the catch by said part on the dog, said spring adapted to yield under pressure to permit the bar to be moved over the catch for said part of the dog to engage therewith and adapted to 'hold' the same in engagement with the catch, said spring adapted to yield to permit the bar to be moved over the catch to trip the dog, said. bar having portions struck up from the side walls thereof beyond said stop plate to hold the stop plate in position, said bar having portions struck up from the side walls thereof on the opposite side of the stop'plate and over which the spring may be removably threaded into abutting engagement with the stop plate Yto secure the'spring in place.

In testimony whereof, we sign this specification. Y

FREDERICK KNGVVLSON. *JOHN HUBER STEVENSONZ,

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