US2013779A - Door securing device - Google Patents

Description

Sept. 10, 1935. P. HELBIG DOOR SECURING DEVICE Fil'ed June 17, 1935 2 Sheets-Sheet 1 In ve zor' Atty/12 Sept. 10, was. P. HELBIG 2,013,779

DOOR SECURING DEVICE Filed June 17, 1933 I 2 sheetssheet 2 19 T70 eA/EvS Patented Sept. 10, 1935 imam;

DQOR SECURING DEVICE Paul Helbig, Berlin, Germany Application June 17, 1933, Serial No. 676,225 In Germany June 25, 1933 1 Claim.

My invention relates to an automatic doorsecuring device. Such automatic door-securing devices, having one arm which rests on a spring and swings at right angles to the direction of the main movement of the door, are known in prior art, and automatic door-securing devices are also known in which there is a fixed or turnable arm on the door and a slotted rail is swingably mounted on the frame. In the last named form of device the rail carries out a lateral movement and is acted on by a spring which frequently breaks because of the many strains to which it is subjected and therefore requires replacement.

To improve the action of such devices it is necessary for the rail to swing easily about its pivot and also that the swinging movement thereof shall not exceed a certain amount.

These drawbacks are eliminated in a simple manner in accordance with the present invention by providing the rail with a ball-like projection which seats itself in a corresponding hollow in the bearing plate and with a recess in which lies a spiral spring surrounding the pivot and supported by the bearing plate. In the displaced position, the rail is prevented from rising by means of angle-shaped stops provided on the frame or on the plate on the frame.

An example of the invention is illustrated in the accompanying drawings in which Figure 1 is a front view partly in section of an automatic door-securing device.

Figure 2 is a fragmentary bottom view partly in section of the same.

Figure 3 is a bottom view of a key.

Figure 4 is a side view of the device.

Figure 5 is a perspective view of the device with some parts in a different position.

Figure 6 is a front View of the device, showing the rail disengaged from the arm.

Figures 7 and 8 are fragmentary plan views partly in section illustrating the action of the key.

In the construction shown in the drawings an arm I) on the door has a T-shaped projection c which engages a slot in the rail d which is swingably attached to a plate e provided on the frame 1. Two fixed bearing parts 9 and h are provided on the plate e and carry a fixed pivot i. The rail d is mounted on the pivot i and has a ball-like projection engaging in the plate part 9. The rail d also has a rim Z forming a recess which has one end of the spiral spring m lying on it. The spiral spring m is mounted at the opposite end on a sleeve n provided on the pivot i.

The studs 0 serve to receive the key 11 which is shown in Figure 3 and is already known and serves to press the rail dback in order to enable the door to be opened from outside.

An angle shaped stop piece q is adapted to be placed on the studs 0 and to engage the slot formed in the rail 1. The frame 1 carries an angle plate or stop piece 1 having a projecting hook s. In operation, when the stud 0 does not carry the key or the stop pieces, the door is free to swing to a limited extent, but is prevented from swinsging beyond that extent, as shown in Figure The connection of the rail d with the plate e does not prevent the door from swinging easily within the limits permitted by the slot t. However, the projection Ic limits the extent of movement of the rail d when the door is closed. Due to the projection 7c the rail (1 always assumes exactly the same position when the door is closed.

If it is desired to use the rail d to lock the door from the inside while it is closed, the stop piece q is brought into engagement with the slot 12 and placed on the stud 0, as shown in Figures 1, 2

and 4.

Then the stop piece q prevents the rail d from moving sufficiently to open the door. In this way the stop piece q functions as a night catch.

To open the door from the inside it is necessary after having removed the stop piece q to move sideways the rail d until the projection 0 becomes disengaged from the slot 13.

The described means of connecting the rail 01 to the plate e permit to carry out this lateral rocking movement without damaging the rail or the spring. The projection k is used to maintain the rail in the correct position to disengage the head 0 from the slot t.

The key 10 is provided with a shoulder u and a guide part 21. If it is desired to open the door from the outside, the key 10 is placed on the stud while the door is partly open, as shown in Figure .5. Then the door is closed and the rail dis moved along the guide part 27 until this rail is brought into engagement with the shoulder u. The rail :1 forces the key p to turn on the stud 0 through the position shown in Figure '7 to the position shown in Figure '7. The turning movement of the key 10 rocks the rail laterally until it becomes disengaged from the projection c as shown in Figures 6 and 8. Then the door can be opened to the full extent.

While the rail (1 is moved laterally into a position in which it is disengaged from the arm b, the rail it engages the stop piece T which prevents it from swinging, so that the rail d remains in a position in which it can again engage the arm b. By limiting the movements of the rail 11 the stop piece 1' prevents the rail 11 from being injured.

When the stop piece q is placed upon the stud o, the key p is not used, since the piece q is used for preventing the opening of the door, i. e. as a "night catch, while the key 17 is used for opening the slotted rail d. Obviously, either the rail q or the key p can be placed upon the stud 0. Figure 4 shows the use of the piece q, by means of which the slotted rail 01 prevents the opening of the door, since the arm b projects through the slot of the rail. When the key 10 is inserted, the rail d is pressed sidewise by the key p; in this position which is illustrated in Fig. 8, the rail d is prevented by the hook s from rotating, so that the door can be conveniently opened and closed.

Having now particularly described and ascertained the nature of my said invention and in what manner the same is to be performed, I declare that what I claim is:

A door securing device, comprising an arm carried by the door, a projection forming a part of said arm, a bearing member having a recess, an oscillatable rail provided with a slot and having a ball-shaped projection forming a part of said rail and adapted to project into said recess of the bearing member,- said rail being adapted to move laterally and being located at the door frame, a 10 pivot carried by said bearing member and passing through an opening formed in said rail, a spring surrounding said pivot and pressing against said rail, a stop piece carried by the door frame and adapted to engage said rail to prevent 15 it from being raised, and a stud situated adjacent to said rail, said stud being adapted to carry a piece engaging said slot in the rail to lock the door and also being adapted to carry a key moving said rail laterally to unlock the door. 20

PAUL HELBIG.

CERTIFICATE OF coRREcTIofi.

Patent No. 2,015,779. I September 10, 195! PAUL HELBIG.

It is hereby certified that error appears in the above numbered patent requiring correction as follows: In the heading to the printed specification, line 5, for the foreign filing date "June 25, 1955" read June 25, 193.2;and that the said Letters Patent should be read with this correction therein that the same may conform to the record of the case in the Patent Office.

Signed and sealed this 14th day of April, A. D. 1936.

Leslie Frazer (Seal) Acting Commissioner of Patents.

Images