Abstract:
A security device has two telescoping arms and a hinge plate at the center for releasing the locked telescoping arms which can be actuated by a persons foot. A spring tensioned telescoping arm prevents unintentional engagement of the security device.

Description:
BACKGROUND OF THE INVENTION 
     1. Field of the Invention 
     The present invention relates to devices for securing a sliding glass door or window in a closed position while permitting folding of the device when the door or window is opened. 
     2. Description of the Prior Art 
     Windows and sliding glass doors of a building are vulnerable to attempts to gain unauthorized entry to the building because the standard releasable latch which retains the door or window in a locked position can be broken by a pry bar inserted between the movable door or window and the jamb member of the support frame. 
     A common device to increase the strength of the window or sliding glass door is a bar placed between the frame of the sliding glass door or window and the opposing jamb member. The bar serves as a compressive device to prevent movement of the door or window and is removed when the door or window is opened. The prior art includes a number of improvements on the simple bar, principally involving a bar in two sections that can be folded when unlocked and that also can be locked into an extended position for securing the door or window. U.S. Pat. No. 4,429,912 to Smith, Jr. discloses first and second bar sections pivotally connected to each other. U.S. Pat. No. 4,572,557 to Taylor discloses a first and second tubular bar hingedly secured together with pivotal end plates and a sliding member for locking the two bars in an extended position. U.S. Pat. No. 5,685,582 to McCartney discloses two pivotally connected overlapping bars with a releaseable sliding mechanism for locking the bars in position. However, a need exists for a strong security bar that can be adjusted to fit the doorway or window to which it is installed and which can be locked and unlocked easily without bending or stooping. 
     SUMMARY OF THE INVENTION 
     The present invention meeting the needs identified above is a security device having two telescoping arms and a hinge plate at the center for releasing the locked telescoping arms which can be actuated by a persons foot. A spring tensioned telescoping arm prevents unintentional locking of the security device. 
    
    
     BRIEF DESCRIPTION OF THE DRAWINGS 
     FIG. 1 is a front view of a sliding glass door with the security device in the locked position. 
     FIG. 2 is a front view of a sliding glass door with the security device in the open position. 
     FIG. 3 is a side view of the security device. 
     FIG. 4 is a top view of the security device. 
     FIG. 5 is a cross section view of the security device along line  5 — 5  of FIG.  4 . 
    
    
     DESCRIPTION OF PREFERRED EMBODIMENTS 
     In FIG. 1 sliding glass door unit  10  is shown as viewed from the interior of a building. First doorframe  12  contains first door glass  16  and second door frame  14  contains second door glass  17 . Security device  100  is attached to first door frame  12  by first mounting bracket  512  and to second door frame  14  by second mounting bracket  514 . Security device  100  consists of first telescoping arm  200 , second telescoping arm  300  and hinge plate  400 . 
     FIG. 2 shows second door frame  14  in the open position and security device  100  rotated about first mounting bracket  512 , second mounting bracket  514  and hinge plate  400  so that first telescoping arm  200  is in a vertical position, second telescoping arm  300  is in a vertical position and first telescoping arm  200  is parallel to second telescoping arm  300 . 
     FIG. 3 shows a side view of security device  100 . First telescoping arm  200  has first mounting bracket  512 , first arm housing  210  and first arm  220 . First arm  220  is rotatably connected to first mounting bracket  512  by first connecting bolt  520  and first connecting bolt nut  521 . First arm  220  is fixedly connected to first arm housing  210  by tightening first threaded bolt  230  into one of first threaded holes  236  and second threaded bolt  231  into another of first threaded holes  236 . First mounting bracket  512  has first mounting bracket side holes  522 . Second telescoping arm  300  has first mounting bracket  514 , second arm housing  310  and second arm  320 . Second arm  320  is rotatably connected to second mounting bracket  514  by second connecting bolt  522  and second connecting bolt nut  523 . Second arm  320  is adjustably connected to second arm housing  310  by third threaded bolt  330  and fourth threaded bolt  331  which are threadedly engaged to selected second threaded holes  336  so as to allow movement of third threaded bolt  330  and fourth threaded bolt  331  within first elongated hole  338  of second arm  310  and second elongated hole  339  of second arm  310  respectively. Movement of third threaded bolt  330  and fourth threaded bolt  331  within first elongated hole  338  and second elongated hole  339  is necessary for maintaining security device  100  in an unlocked position as will be explained further below. Second arm  320  has spring adjustment bracket  344  connected to second arm  320  by fifth threaded bolt  342 . Spring  348  is connected to spring adjustment bracket  344  by spring threaded bolt  343  and nut  345 . Spring  348  is also connected to spring mounting bracket  346  by spring threaded bolt  343  which is slidingly engaged to spring mounting bracket  346  passing through a hole (not shown) in spring mounting bracket  346 . Spring mounting bracket  346  is “L” shaped and is fixedly engaged to second arm outer end  311 . In the preferred embodiment, spring mounting bracket  346  is welded to second arm outer end  311 . Spring  348  exerts pressure on spring mounting bracket  346  which is fixedly engaged to second arm outer end  311  so that security device will not go to a horizontal position under its own weight but only when intentionally pressed into a horizontal position by outside pressure being applied to foot pad  402  of hinge plate  400 . In FIG. 3, first telescoping arm  200  and second telescoping arm  300  are rotatably connected to hinge plate  400  by first interlocking threaded bolt receiver  241  and first interlocking threaded bolt  240  and second interlocking threaded bolt receiver  341  and second interlocking threaded bolt  340  respectively. Hinge plate  400  has foot pad  402  and release lever  410  (Shown in FIG.  5 ). Release lever  410  is hingedly connected to foot pad  402  and fixedly connected to tab stop  404 . Tab stop  404  is in the same plane with first arm housing tab  270  and second arm housing tab  370 . 
     FIG. 4 shows a top view of security device  100 . First mounting bracket  512  is rotatably engaged to first arm  220  by first rivet  520 . First mounting bracket  512  has first door bolt  580  and second door bolt  582  for affixing first mounting bracket to doorjamb  12  (See FIGS.  1  and  2 ). Second mounting bracket  514  has third door bolt  584  and fourth door bolt  586  for affixing second mounting bracket  514  to door frame  14  (See FIGS.  1  and  2 ). Foot pad  402  can be used to help extend security apparatus from the open position shown in FIG. 2 to the closed position shown in FIG. 1 by applying pressure to foot pad  402  while moving the door toward the closed position. First arm  220  has a plurality of holes in the top of first arm  220 . FIG. 1 shows eight holes. However, any number can be used to increase the adaptability of security device  100  to a variety of door frames. First arm bolt holes  236  are round. First arm housing  210  has elongated bolt hole  238  and elongated bolt hole  239  designed to allow small scale adjustment of the length of first telescoping arm  200 . Second arm  320  has a plurality of holes in the top of second arm  320 . FIG. 4 shows eight holes. However, any number can be used to increase the adaptability of security device  100 . Second arm housing  310  has second arm first elongated bolt hole  338  and second arm second elongated bolt hole  339  to allow movement of third threaded bolt  331  and fourth threaded bolt  330 . Moreover, movement of third threaded bolt  331  and fourth threaded bolt  330  in second arm first elongated bolt hole  338  and second arm second elongated bolt hole  339 , respectively, is desirable as spring  348  (See FIG. 3) provides tension for maintaining security device  100  in an unlocked position. Spring  348  is held in position by spring threaded bolt  343 . 
     FIG. 5 shows a cross section of second arm housing  200  at line  5 — 5 . Foot pad  402  is a solid piece. Hinge  420  is fixedly engaged to foot pad underside  403  by hinge anchor section  430 . Release lever  410  and tab stop  404  are fixedly connected to each other and rotate about hinge  420 . Upward displacement of release lever  410  moves tab stop  404  out and away from first arm housing tab  270  allowing rotation of first arm housing  210  about hinge plate  400 . Likewise, when release lever  410  is moved upward, tab stop  404  will move out and away from second arm housing tab  370 , allowing rotation of second arm housing  310  about hinge plate  400 . 
     With respect to the above description then, it is to be realized that the optimum dimensional relationships for the parts of the invention, to include variations in size, materials, shape, form, function and manner of operation, assembly and use, are deemed readily apparent and obvious to one skilled in the art, and all equivalent relationships to those illustrated in the drawings and described in the specification are intended to be encompassed by the present invention.