Patent Publication Number: US-2005129472-A1

Title: Guide for drill

Description:
FIELD OF INVENTION  
      The present invention relates to drills and, more particularly, to a guide for drills while boring a door with holes for receiving a lock.  
     BACKGROUND OF INVENTION  
      Referring to  FIG. 8 , there is shown a conventional guide  60  for drills (not shown) while boring a door with holes for a lock (not shown). The conventional guide  60  includes a first portion  62  and a second portion  64  extending perpendicular to the first portion  62 . A hole  66  is defined in the first portion  62 . On the first portion  62  extends a rim  68  around the hole  66 . A hole  70  is defined in the second portion  64 . On the second portion  64  extends a rim  72  around the hole  70 . Two holes  74  are defined in the second portion  64 . Referring to  FIG. 9 , a door D 1  is shown. The door D 1  includes a front face, a rear face and a side between the front and rear faces. The first portion  62  is put against the front face of the door D 1 . The second portion  64  is put against the side of the door D 1 . Two screws  76  are driven into the side of the door D 1  through the holes  74  in order to secure the guide  60  to the door D 1 . A first drill (not shown) can be put into the hole  66  and guided by means of the rim  68 . The first drill can be driven through the door D 1  from the front face to the rear face in order to bore a first hole (not shown) in the door D 1 . A second drill (not shown) can be put into the hole  70  and guided by means of the rim  72 . The second drill can be driven into the door D 1  from the side in order to bore a second hole (not shown) in the door D 1 . The first hole is communicated with the second hole. A lock (not shown) can be put in the first hole, and a tongue of the lock can be put in the second hole. There is a need to bore the first hole in a different position. This need cannot be satisfied due to the first portion  62  made of a fixed size. Furthermore, it is required that the second hole be located in the middle of the side of the door D 1 . This requirement cannot be fulfilled if the guide  60  is used for another door D 2  of a different thickness shown in  FIG. 10  due to the second portion  64  made of a fixed size. Moreover, after removal of the guide  60  from the door D 1  or D 2 , two holes are left in the side because of the screws  74 , and this is not desired.  
      The present invention is therefore intended to obviate or at least alleviate the problems encountered in prior art.  
     SUMMARY OF INVENTION  
      It is an objective of the present invention to provide drills with a guide making it possible to bore a door with a hole at various distances from a side of the door.  
      It is another objective of the present invention to provide drills with a guide ensuring that a hole be bored in the middle of a side of a door regardless of the thickness of the door.  
      According to the present invention, a guide is provided for guiding a first drill and a second drill while boring a door with holes for receiving a lock. The guide includes a first element, a second element, a third element, a first threaded bolt and a second threaded bolt. The first element guides the first drill and abuts a first face of the door. The second element guides the first drill and abuts a second face of the door. The third element abuts a side of the door. The first threaded bolt is connected between the first element and the third element so that the first element is movable on the first face of the door. The first threaded bolt is operable for driving the first element against the first face of the door. The second threaded bolt is connected between the second element and the third element so that the second element is movable on the second face of the door. The second threaded bolt is operable for driving the second element against the second face of the door.  
      Other objects, advantages and novel features of the invention will become more apparent from the following detailed description in conjunction with the attached drawings. 
    
    
     BRIEF DESCRIPTION OF DRAWINGS  
      The present invention will be described through detailed illustration of two embodiments referring to the drawings.  
       FIG. 1  is a perspective view of a guide for drills according to a first embodiment of the present invention.  
       FIG. 2  is an exploded view of the guide of  FIG. 1 .  
       FIG. 3  is a cross-sectional view of the guide of  FIG. 1  used for a door.  
       FIG. 4  is similar to  FIG. 3  but shows the guide in a different position for boring the door with a hole at another distance from a side of the door.  
       FIG. 5  is similar to  FIG. 3  but shows the guide in a different position for boring the door with a hole in a position biased from the middle of a side of the door.  
       FIG. 6  is similar to  FIG. 3  but shows the guide used for a thicker door.  
       FIG. 7  is an exploded view of a guide for drills according to a second embodiment of the present invention.  
       FIG. 8  is a perspective view of a conventional guide for drills.  
       FIG. 9  is a cross-sectional view of the conventional guide of  FIG. 8  used for a door.  
       FIG. 10  is similar to  FIG. 9  but shows the conventional guide used for a thicker door. 
    
    
     DETAILED DESCRIPTION OF EMBODIMENTS  
      Referring to  FIG. 1 , according to a first embodiment of the present invention, a guide is provided for drills (not shown) while boring a door with holes for receiving a lock. The guide includes a first element  10 , a second element  20  and a third element  30 .  
      Referring to  FIG. 2 , the first element  10  includes a rim  11  formed on a first portion thereof and a bracket  12  raised from a second portion thereof. In the first portion of the first element  10  is defined a window  14  around which the rim  11  extends. Two holes  16  and  18  are defined in the bracket  12 .  
      The second element  20  includes a rim  21  formed on a first portion thereof and a bracket  22  raised from a second portion thereof. In the first portion of the second element  20  is defined a window  24  around which the rim  21  extends. Two holes  26  and  28  are defined in the bracket  22 .  
      The third element  30  includes a first portion  31 , a second portion  32  and a third portion  33  formed between the first portion  31  and the second portion  32 . A threaded hole  34  is defined in the first portion  31  of the third element  30 . A threaded hole  35  is defined in the second portion  32  of the third element  30 . A rim  36  is formed on the third portion  33  of the third element  30 . In the third portion  33  of the third element  30  is defined a window  38  around which the rim  36  extends.  
      Referring to  FIG. 3 , a door  50  is shown. The door  50  includes a first face  51 , a second face  52  and a side  53  between the first face  51  and the second face  52 .  
      The first element  10  is put against the first face  51  of the door  50 . The second element  20  is put against the second face  52  of the door  50 . The third portion  33  of the third element  30  is put against the side  53  of the door  50 . The first portion  31  of the third element  30  is covered via the bracket  12 . The second portion  32  of the third element  30  is covered via the bracket  22 . A first threaded bolt  41  is driven into the threaded hole  34  through the hole  16 . A second threaded bolt  42  is driven into the threaded hole  35  through the hole  26 . Thus, the guide is secured to the door  50 .  
      In order to bore a first hole (not shown) in the door  50 , a first drill (not shown) is put into the window  14  or  24 , guided via the rim  11  or  21 . The first drill is driven from the first face  51  to the second face  52  or from the second face  52  to the first face  51 . In order to bore a second hole (not shown) in the door  50 , a second drill (not shown) is put into the window  38 , guided via the rim  36 . The second drill is driven into the door  50  from the side  53 . The first hole is communicated with the second hole. A lock (not shown) can be put in the first hole, and a tongue of the lock can be put in the second hole.  
       FIG. 4  is similar to  FIG. 3  but shows that the first threaded bolt  41  is driven into the threaded hole  34  through the hole  16  and that the second threaded bolt  42  is driven into the threaded hole  35  through the hole  26 . Thus, the second hole can be bored in the door  50  at another distance from the side  53 .  
       FIG. 5  is similar to  FIG. 3  but shows the guide in a different position where the center of the window  38  is not aligned with the middle of the side  53  of the door  50 . Accordingly, the center of the second hole is biased from the middle of the side  53  of the door  50 .  
       FIG. 6  is similar to  FIG. 3  but shows the guide used for a thicker door  55 . Thus, the second hole is still aligned with the middle of a side of the door  55 .  
       FIG. 7  shows a guide according to a second embodiment of the present invention. The second embodiment is identical to the first embodiment except for substituting a slot  19  for the holes  16  and  18  and substituting a slot  29  for the holes  26  and  28 .  
      The present invention has been described via detailed illustration of two embodiments. Those skilled in the art can derive variations from the embodiments without departing from the scope of the present invention. Therefore, the embodiments shall not limit the scope of the present invention defined in the claims.