US3816967A

US3816967A - Security bar for sliding doors

Info

Publication number: US3816967A
Application number: US00233995A
Authority: US
Inventors: J Littrell
Original assignee: Individual
Current assignee: Individual
Priority date: 1972-03-13
Filing date: 1972-03-13
Publication date: 1974-06-18
Anticipated expiration: 1991-06-18

Abstract

An adjustable, elongated security bar including two telescopic sections and having a depending leg on one end with an outwardly extending projection thereon which fits beneath the corner of the frame of a sliding glass patio door and having on the other end an arrangement or projections one of which is carried by a depending leg approximately the same length as the leg on the other end for positioning in the door frame track in the threshold. Another projecting member on the same end as the second leg projects outwardly and fits into the vertical channel in the door frame above the bottom corner to prevent dislodgement and stop the door from sliding. The projection on the second leg rests against the face of the second door frame which may be either a sliding glass door frame or a fixed door frame and still another projection thereabove projects in front of the second frame and blocks the frame and therefore the entire second door from movement. Another and second, outwardly projecting member is an alternative construction for a different type of frame.

Description

United States Patent [191 Littrell June 18, 1974 SECURITY BAR FOR SLIDING DOORS [76] Inventor: James A. Littrell, 111 Little Valley Dr., Cartersville, Ga. 30120 [22] Filed: Mar. 13, 1972 [21] Appl. No.: 233,995

[52] US. Cl. 49/449, 292/262 [51] Int. Cl EOSd 13/04 [58] Field of Search 49/449, 450; 292/2 DF, 292/262, 335

[56] References Cited UNITED STATES PATENTS 3,135,543 6/1964 lngalls 292/262 3,698,754 10/1972 Means 292/262 Primary Examiner-Kenneth Downey Attorney, Agent, or Firm-Patrick F. Henry [57] ABSTRACT An adjustable, elongated security bar including two telescopic sections and having a depending leg on one end with an outwardly extending projection thereon which fits beneath the comer of the frame of a sliding glass patio door and having on the other end an arrangement or projections one of which is carried by a depending leg approximately the same length as the leg on the other end for positioning in the door frame track in the threshold. Another projecting member on the same end as the second leg projects outwardly and fits into the vertical channel in the door frame above the bottom corner to prevent dislodgement and stop the door from sliding. The projection on the second leg rests against the face of the second door frame which may be either a sliding glass door frame or a fixed door frame and still another projection thereabove projects in front of the second frame and blocks the frame and therefore the entire second door from movement. Another and second, outwardly projecting member is an alternative construction for a different type of frame.

6 Claims, 3 Drawing lFigures 1 SECURITY BAR FOR SLIDING DOORS BACKGROUND OF THE INVENTION 1. Field of the Invention Security latching devices for closures such as doors and windows. Fixed bar-type security locks for doors.

2. Description of the Prior Art The most common and least expensive method of blocking a sliding glass door is to use a section of broomstick or pole dropped into the channel of the threshold with one end abutting the door frame and the other end abutting the fixed frame in the wall. There is a space between the sliding glass door frame and the fixed or second sliding glass door frame which is sealed by insulation of one sort or another such as a rubber strip but it is possible to insert ascrewdriver or other implement through this space and to manipulate a broomstick or similar straight section in such a way as to dislodge it from the door. This has been done quite often by burglars to enter a patio door in homes. There are other security latching devices for sliding glass doors including chains and implements inserted between the fixed frame in the opening and the vertical part of the door frame. As mentioned previously the members inserted in this manner can be dislodged 'by manipulation with a thin implement or screwdriver. Chains can be forced loose by constant pressure on the door and it is even possible to use a small screwjack implement to jack the door enough to rip the chain bracket from its anchor. A sliding glass door is a common way of entering a home and it is usually secluded at the rear or side where a burglar can work quietly for a few minutes to get the door open. The present device is inserted and removed quickly and easily but cannot be dislodged by manipulation either between the door frames or pressure against one or the other.

SUMMARY OF THE INVENTION An adjustable security bar which has one end inserted beneath the corner of the sliding glass door frame and the other end projecting in such a way as to be inside the fixed frame channel and in front of a second door frame.

An object of this invention is to provide a security bar which is easily installed and removed and which therefore can be placed at night before retiring and removed the next day and which is so inserted behind the movable door frame as to prevent dislodgement by a potential house breaker working outside the door and so arranged as to also block a second sliding glass panel and to be located in a recessed part of the fixed wall frame.

Another object of this invention is found in the adaptability of the above noted security bar so that it may fit anyone of many different sizes and types of doors.

Another object of this invention is found in the simplicity of construction lending itself to economical manufacture.

BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 is a top plan view of one form of the present security bar in place on a typical sliding glass patio door arrangement which slides from right to left.

FIG. 2 is a perspective view of the sliding glass door arrangement and security bar shown in FIG. 1, and with .2 the parts of thefixed frame and door frames shown in dotted lines.

FIG. 3 is a perspective viewof the same bar of FIG. 1 on a door which slides from left to right.

DESCRIPTION OF THE PREFERRED EMBODIMENT The security bar is designated overall and generally by reference numeral 10 and comprises an elongated bar member designated generally by reference numeral 12 consisting of two

elongated members

14, 16 telescopically connected to form the composite elongated bar 12. Section 16 is hollow and has inserted therein the end of sectionl4 which hasa series of holes 18 in spaced relation thereon and any one of which matches with a hole 20 in section 16 into which is inserted a fastener 22 thereby providing selective adjustment of the two

sections

14, 16 by repositioning fastener 22 in any one of many positions of aligned openings 18, 20.

The security bar 10 fits any one of many different sizes and arrangements of doors. In the dotted lines in FIGS. 1 and 2 there is illustrated partially a typical fixed aluminum frame 30 in a wall opening and having a threshold 32 supporting an inside track 34 and an outside track 36 in which respectively is mounted a respective sliding glass door 38, 40 each having respective horizontal frame members 42 and vertical frame members 44 in which is mounted glass 46.

The fixed frame 30 in the wall opening includes vertical frame members 50 in the form of aluminum channels or extrusions 52. Door 38 slides from right to left inside the room to be made secure.

The security bar 12 section 16 has a short leg 60 extending therefrom and leg 60 has a short projection or foot 62 which is slightly tapered to fit beneath the corner under the horizontal frame member 64 at the corner 66 of the first removable or fixed door 38. The leg 60 lies in and extends parallel with the track 34 under the door 38.

The other end of the security bar 10 opposite from section 16 and on the end of section 14 includes a downwardly depending and projecting leg 70 which is welded, brazed or otherwise attached to the section 14. Leg 70, which is about the same length as the leg 60 on the other end, includes a short projection 72 which engages the side of the door frame member 42 of second door 40. A third projection 76 is a door blocking projection and extends inwardly from the section 14 to abutt and lie against the face 78 of the vertical frame member 44 of the second sliding door 40. The end of section 14 has an outwardly extending fourth projection 80 which fits into and transversely across the channel 52 securely positioning the section 14 to prevent displacement and dislodgement and to prevent the section 14 from being dislodged sideways or rotated to bring the ends of the section 14 out of the channel 52. Another projection 82 which is spaced from and parallel with a projection 80 and extends outwardly in the same manner is slightly longer and it is for a different type of door arrangement than that shown in FIGS. 1 and 2.

In the arrangement shown in FIG. 3 the inside door in the room slides from left to right and the other door 92 on the right hand is outside and may be a fixed panel or removable panel door. The same security bar 10 is used with the fourth projection 80 against the frame of door 92 and the projection 82 is across the face of the frame of door 92 just as projection 76 was previously. Leg 70 is vertical and in the same position except that projection 72 faces outwardly rather than against the door frame.

While I have shown and described a particular embodiment of this invention in connection with a certain arrangement of sliding glass door this is by way of illustration only and does not constitute any sort of limitation since there are various alterations, changes, deviations, amendments, revisions, eliminations, additions, substitutions, omissions and departures which may be made in the present illustration and other types of sliding glass doorarrangements with which the present invention can be used without departing from the scope of this invention as defined only by a proper interpretation of the appended claims.

What is claimed:

1. In a security bar positioned on the fixed frame in a wall opening in which there is at least one first sliding door having a door frame in said fixed frame and in which there is at least one other second either fixed or sliding door having a door frame in the same fixed frame:

a. an elongated, rigid, strong and adjustable security bar having a downwardly depending leg on one end thereof, said leg terminating in a short angular projection which is fitted beneath the corner of the first sliding door, said bar being supported on said leg above the bottom of the sliding door and being selectively adjustable in length to fit tightly between the first sliding door and the fixed frame,

b. the other end of the bar being inserted against and abutting the fixed frame opposite from the sliding door frame in a tight fitting,

c. and at least one other projection projecting inwardly in front of a portion of said second door frame to prevent said sliding door from movement and to prevent dislodgement of said security bar in a certain direction of attempted movement.

2. The device claimed in claim 1 wherein there is a transverse projection on the end of said security bar which is engaged with said fixed frame and said projection extending transversely to said fixed frame.

3. The device in claim 1 wherein there is a second projection extending inwardly in generally the same direction of said first projection and engaging the side of said second door frame.

4. The device in claim 1: said security bar comprising two elongated sections rigidly and adjustably connected.

5. The device in claim 4: said sections being telescopically engaged for telescopic adjustment in length.

6. The device in claim 2: another and second transverse projection on said bar extending transversely in a direction opposite from said first transverse projection and being used when said bar is positioned with said second transverse projection across a door frame.

Claims

1. In a security bar positioned on the fixed frame in a wall opening in which there is at least one first sliding door having a door frame in said fixed frame and in which there is at least one other second either fixed or sliding door having a door frame in the same fixed frame: a. an elongated, rigid, strong and adjustable security bar having a downwardly depending leg on one end thereof, said leg terminating in a short angular projection which is fitted beneath the corner of the first sliding door, said bar being supported on said leg above the bottom of the sliding door and being selectively adjustable in length to fit tightly between the first sliding door and the fixed frame, b. the other end of the bar being inserted against and abutting the fixed frame opposite from the sliding door frame in a tight fitting, c. and at least one other projection projecting inwardly in front of a portion of said second door frame to prevent said sliding door from movement and to prevent dislodgement of said security bar in a certain direction of attempted movement.