US1370975A - Door-fastening mechanism - Google Patents

Description

F. KNOWLSON AND J. H. S TE VENSON.

DOOR FASTENING MECHANISM.

APPLICATION man OCT. 1. 1920.

1,370,975, Patented Mar. 8, 1921. 2 SHEETS-SHEET 1: T

F :[uuuuuml 9 F. KNOWLSON AND J. H. STEVENSON.

DOOR FASTENING MECHANISM APPLICATION FILED OCT. I, 1920. 1,370,975.- Patented Mar. 8, 1921.

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FREDERICK KNOWLSON AND JOHN HUBER STEVENSON, OF ANN ARBOR, MICHIGAN.

DOOR-FASTENING MECHANISM.

. Specification 0f Letters Patent.

Patented Mar. 8, 1921.

Application filed October 1, 1920. Serial No. 414,152.

To all whom it may concern:

Be it known that we, FREDERICK KNOWL- SON and J0EE HUBER STEvENsoN, respectively a British subject and a citizen of the United States, residing at Ann Arbor, county of lVashtenaw, State of Michigan, have invented a certain new and useful Improvement in Door- Fastening Mechanism, and declare the following 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 and use the same, refer.- ence being had to the accompanying drawings, which form a part of this specification.

Our invention relates to door fasteners or a door fastening mechanism secured to the door in such a manner as to hold the door in its open position, but releasable so as to permit closing of the door.

The object is to provide for a swinging door a fastening device capable of holding the door in its open position against any jar, shock or thrust which it might be given by a gust of wind, or otherwise, yet so adapted that the door may be easily closed by the one operating it.

In the drawings,-

Figure 1 is a perspective showing our device secured to a swinging door.

Fig. 2 is an elevation partly broken away of our device.

Fig. 3 is a view partly in section of the latch bar and catch carried by the door frame.

Fig. 4: is a View similar to Fig. 1 except that the latch bar has been moved farther along relative to the catch.

Fig. 5 is a view of the parts shown in Fig. 3 during the operation and closing of the door.

Fig. 6 is a modified in its locked position.

Fig. 7 is a view of the modification shown in Fig. 6, the bar being open beyond its locked position. I

Fig. 8 is a view similar to Fig. 7 except that the latch bar is moved farther along relative to the catch.

Fig. 9 is a view of the modification shown in Fig. 6 during the operation of closing the door.

Fig. 10 is another modified form of our device during the closing operation of the door.

form of my device member a secured to the lintel c.

Fig. 11 is a view of the parts shown in Fig. 10 in the opening of the door.

Our device is in the form of a latch bar provided with a stop adapted to cooperate with a fixed catch forming a slidable contact therewith in the opening and closing of the door. This latch bar stop is adapted to be engaged by the catch when the door is 1n a determined open position to secure the door at suchposition. The latch bar is further provided with a swinging guard member or cam adapted to be released as the door is opened sufiiciently to permit such cam to pass the fixed catch so that upon the return of the catch along the latch bar during the closing of the door the cam will swing into position to prevent the stop on the latch bar from engaging the catch.

Let a indicate the wall of a building; I)

swinging door secured thereto, and c the lintel of the door frame.

A latch bar indicated as d is shown as being provided with a section 03 hinged at one end thereof. This section d is adapted to be secured to the top rail of the door, as shown in Fig. 1. The latch bar itself is shown in elevation in Fig. 2. This latch bar is adapted to form a sliding contact with a catch or a guide In the form shown in the figures of the drawing, the catch is illustrated as a guide member perforated so the latch bar will pass therethrough. It is quite apparent that this catch might be of such a character that the latch bar would merely pass thereover or alongside the same, so adapted that they would form a sliding contact with each other, in order that when the notch f in the latch bar arrives alongside the catch it would be engaged thereby preventing the return of the latch bar and the consequent closing of the door. To prevent binding between the catch and the latch bar in its movement therethrough the catch is shown as being swiveled to a catch plate 6 by means of a pin 6 such plate being securely attached to the lintel. This pivotal mounting of the catch will permit its free movement with the movement of the latch bar.

The latchbar is provided with a stop adapted to engage the catch so as to secure the door in its open position. This stop is here shown as a notch 7 cut in one edge of the latch bar. This is a simple form of stop when the latch bar is adapted to ride over the catch, but it is quite evident that a stop in the form of a boss or any other convenient projection or recess adapted to engage with the fixed catch member would equally well serve the purpose.

The latch bar is further provided with a swinging cam or guard g secured thereto so that as the door is opened, it will not interfere with the engagement of the catch and the latch bar stop, but as the door is further opened, the guard member swings free of the fixed catch 6, and as the door is closed and the latch bar returns along over the catch this guard member swings in such a manner relative the latch bar as to pre vent the catch from engaging the latch bar stop and permits the closing of the door.

In the form of swinging cam shown in Figs. 1 to 5, of the drawings, the cam is swung from one side of the latch bar and is so shaped that when the latch bar returns over the catch, as shown in Figs. l and 5, the cam swings alongside the latch bar so as to prevent the catch from engaging with the notch f cut in such bar. The perforation in the catch through which the latch bar travels is cut out at the side to provide a passageway through which this swinging cam may move in the reciprocation'of the latch bar, also forming a shoulder adapted to engage the cam during the closing of the door.

In Figs. 6 to 9 inclusive, the swinging guard or cam is pivoted in a groove in the latch bar and adapted to swing out of the way to permit the opening of the door until the catch clears this swin 'in 'uard, as

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shown in Figs. 7 and 8, but adapted to swing back into position as the catch returns along the latch bar, engaging the catch and preventing it from engaging the notch or stop on the latch bar.

Fig. 6 shows the position of the catch and latch bar when the door is secured in the i open position.

Figs. 10 and 11 show yet another modification. Swinging cams or guards of a large number of-forms might be employed and also their method of being secured to the latch bar might be widely varied. We have shown some of the preferred forms of cams and methods of securing the same to the door. The cam shown in Figs. 10 and 11 is a two-prong one and the manner of operation is apparent from the drawing.

catch carried by the frame, as shown in Figs. 4 and 8, the spring being compressed between the fixed stop '5 on the latch against which the spring is seated and the catch or guide member 6, the latch bar being drawn through the guide member until the swinging cam is free.

lVhat we claim is:

1. Incombination with a swinging door, a latch bar secured tothe door, a fixed catch secured to the door frame. with which catch the latch bar forms a sliding contact in the opening or closing of the door, such latch bar provided with a stop adapted to engage such fixed catch when the door is opened to a determined position, a swinging cam secured to such latch bar in such manner that when the ba is opened such a distance that the cam is between the door and the fixed catch upon the return movement of the latch bar alongside the catch such cam will prevent the catch from engaging the stop 011 the bar.

2. In combination with a swinging door, a latch bar secured to the door, a fixed catch secured to the frame but adapted to slidably engage with such latch bar so as to pass therealong'in the opening and closing of he door, such latch bar provided with a stop adapted to be engaged by such catch when the door is opened to a determined position, a guard member secured to such latch bar near such stop in-such a manner as to swing alongside the latch bar so as to prevent the engagement of the stop by the catch as they pass each other upon the closing of the door from a determined opened position.

In combination with a swinging door, afixed catch secured to the door frame, a latch bar secured at one end to the door adapted to pass along said catch forming a sliding contact therewith in the opening and closing ot the door, said latch bar provided with a notch adapted to be engaged by such catch at a certain open position of the door to prevent closing of the door, a swinging cam secured to such latch bar in such a manner that when the door is opened to such a distance that when the swinging cam passes by the fixed catch when the door is closed the cam is engaged by the fixed catch preventing the engagement of the catch by the latch bar notch.

4:. In combination with a swinging door, a fixed catch carried by the door frame, a latch bar carried by the door adapted to pass over the catch forming a sliding contact therewith in the opening and closing of the door, said latch bar provided with a stop adapted to be engaged by saidcatch to hold the door in an open position, a cam secured to the latch bar so as to swing relative the stop so as to prevent the stop from being engaged by the catch.

5. In combination with a swinging door and a door frame, a fixed catch swiveled to the door frame, a latch bar, one end of which is secured to the door and vwhich is adapted to slidably engage such catch in such a. man ner that when the door is opened and closed the latch bar is reciprocated over the catch, said latch bar provided with a stop adapted to engage said catch when the door is opened to a determined position, a swinging cam carried by the latch bar adapted to be tripped by the catch when the latch bar is moved over the catch beyond the stop on the bar so that when the bar is reciprocated over the catch in the closing of the door such cam will swing to such a position relative the stop on the bar as to prevent the engagement of said stop by the catch.

6. In combination with a swinging door, a door fastening mechanism comprising a fixed catch member and a sliding latch bar adapted to be reciprocated over said catch in the opening and closing of said door, said latch bar provided with a stop adapted to be engaged by said catch when the door is in a certain open position, a movable member carried by said latch bar adapted to be actuated by said catch in the closing of the door to enable the stop on the latch bar to pass the catch without being engaged thereby.

7. In combination with a swinging door, a door fastening mechanism for maintaining the door in its open position, comprising a fixed catch member carried by the frame and a latch bar pivoted to the door adapted to travel over said catch forming a slidable contact therewith in the opening and closing of the door, said latch bar provided with a stop adapted to be engaged by said catch when the door is in a determined open position to prevent the return of the latch bar along the catch and consequent closing of the door, a movable member carried by the latch bar adapted to be tripped by the catch as the latch bar is moved thereover in the further opening of the door beyond the stop,

a spring carried by said latch bar adapted to resist such movement of said latch bar over the catch beyond the determined position indicated by the stop on the latch bar, said swinging member after the same is tripped adapted to engage the catch in the closing of the door to prevent the catch from being engaged by the stop on the latch bar.

8. In combination with a swinging door and door frame, a fixed catch carried by one of said members, a latch bar carried by the other, said latch bar adapted to reciprocally travel over the catch in the opening and closing of the door, said latch bar provided with a stop adapted to engage said catch in a certain open position, a movable member carried by said latch bar adapted to engage such catch so as to prevent the latch bar stop from engaging the same as the door is closed and after it has been opened a determined distance.

9. In combination with a swinging door and door frame, a fixed catch carried by the frame, a latch bar pivoted to the door engaged with said catch so as to slide thereover 1n the opening and closing of the door, said latch bar provided with a stop adapted to be engaged by said catch to secure the door in a determined open position against closing, a swinging member pivoted to said latch bar so as to be tripped by said catch when the latch bar is moved over the catch beyond the stop on the bar, means for yieldingly resisting the movement of said latch bar over the catch to trip said swinging member, said swinging member adapted to drop into position after it has been tripped so as to engage the catch in the closing of the door in such a manner as to prevent the stop on the latch bar from engagaing said catch, thereby permitting the closing of the door.

In testimony whereof we sign this specification.

FREDERICK KNOWLSON. JOHN HUBER STEVENSON.

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