EP0153627A1 - Concealed door release mechanism - Google Patents
Concealed door release mechanism Download PDFInfo
- Publication number
- EP0153627A1 EP0153627A1 EP19850101284 EP85101284A EP0153627A1 EP 0153627 A1 EP0153627 A1 EP 0153627A1 EP 19850101284 EP19850101284 EP 19850101284 EP 85101284 A EP85101284 A EP 85101284A EP 0153627 A1 EP0153627 A1 EP 0153627A1
- Authority
- EP
- European Patent Office
- Prior art keywords
- door
- latch bolt
- release mechanism
- ramped surface
- strike block
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Granted
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Classifications
-
- E—FIXED CONSTRUCTIONS
- E05—LOCKS; KEYS; WINDOW OR DOOR FITTINGS; SAFES
- E05B—LOCKS; ACCESSORIES THEREFOR; HANDCUFFS
- E05B47/00—Operating or controlling locks or other fastening devices by electric or magnetic means
- E05B47/0046—Electric or magnetic means in the striker or on the frame; Operating or controlling the striker plate
- E05B47/0047—Striker rotating about an axis parallel to the wing edge
Definitions
- This invention relates to security devices, and more particularly to a concealed door release mechanism for doors utilizing latch bolts.
- a door release mechanism is provided which is concealed within a door jamb.
- a door release mechanism for a door having a latch bolt is provided.
- a strike block is adapted to receive the latch bolt.
- Structure is provided within the strike block for urging the latch bolt into the door to thereby open the door.
- Structure is further provided within the strike block for preventing the latch bolt from being urged into the door to thereby maintain the door closed.
- a door release mechanism for a door having a latch bolt is provided.
- a strike block is adapted to receive the latch bolt and includes a ramped surface over which the latch bolt travels. The ramp surface urges the latch bolt into the door to thereby open the door.
- a pivoting keeper is disposed within the strike block for selectively allowing the latch bolt to travel over the ramped surface to the door open position. Structure is provided for controlling the pivoting keeper for controlling the position of the pivoting keeper with respect to the ramped surface of the strike block.
- Door release mechanism 10 is mounted within a strike block 12 which is covered by a strike plate 14.
- Strike plate 14 includes apertures 16 for mounting strike plate 14 and strike block 12 to a door jamb (not shown).
- Strike block 12 is mounted to strike plate 14 utilizing screws 20.
- Strike block 12 receives a latch bolt 22 carried by a door 24 when door 24 is in the closed position.
- Latch bolt 22 is retracted within door 24 as door 24 is opened.
- Latch bolt 22 is spring loaded and is extended into strike block 12 when door 24 is closed.
- a ramped surface 26 Disposed within strike block 12 is a ramped surface 26 over which latch bolt 22 travels. Also included within strike block 12 and disposed within a slot 28 within ramped surface 26 is a keeper mechanism 30. Keeper mechanism 30 is pivotable about pin 32 within strike block 12. As illustrated in FIGURE 2, keeper mechanism 30 is in the closed position such that latch bolt 22 is positioned below keeper mechanism 30 at the bottom end of ramped surface 26.
- keeper mechanism 30 Interconnected to strike block 12 is a solenoid 36 which when actuated causes keeper mechanism 30 to be retracted within strike block 12 as latch bolt 22 moves across ramped surface 26 from the bottom end of ramped surface 26 to the top end thereof. Such movement thereby enables door 24 to open. In the open position of door 24, keeper mechanism 30 automatically returns to the position illustrated in FIGURE 2.
- a return spring 40 which maintains keeper mechanism 30 in the position as illustrated in FIGURE 2.
- keeper mechanism 30 Interconnected to keeper mechanism 30 is a channel-like dogging member 42 which is pivotally interconnected to keeper mechanism 30 via a pin 44. Also mounted on pin 44 is a roller 46. Pivotally interconnected to dogging member 42 is a lever member 48 via a pin 50.
- solenoid 36 When solenoid 36 is energized, members 42 and 48 pivot to allow keeper mechanism 30 to pivot in a clockwise direction about pin 32.
- latch bolt 22 moves up ramped surface 26, it is simultaneously forced into door 24 thus releasing door 24 near the end of travel of latch bolt 22.
- a short continuation of ramped surface 26 is provided by a bevel 56 on the opening in strike plate 14.
- a slight bevel 22a may be provided on latch bolt 22 to provide a smoother operation of latch bolt 22 as it travels over ramped surface 26.
- FIGURE 2 illustrates keeper mechanism 30 in the closed position while FIGURE 3 illustrates keeper mechanism 30 in the open position.
- keeper mechanism 30 In the open position of keeper mechanism 30, keeper mechanism 30 is biased to its full counterclockwise position around pin 32 with members 42 and 48 horizontally disposed.
- Return spring 40 biases keeper mechanism 30 to the closed position as illustrated in FIGURE 2.
- a bias spring 60 also extends around pin 32 and engages dogging member 42. Bias spring 60 maintains dogging member 42 in its fully counterclockwise position about pin 44.
- a torsion spring 62 is mounted around pin 50 to hold lever member 48 in -its fully clockwise position about pin 50. Torsion spring 62 may be held within a groove in lever member 48. Springs 40, 60 and 62, bias keeper mechanism 30, dogging member 42 and lever member 48 in the position shown in FIGURE 2.
- a push plunger 66 extends from solenoid 36 into strike block 12 when solenoid 36 is electrically energized.
- solenoid 36 When solenoid 36 is energized, push plunger 66 engages pin 50 interconnecting dogging member 42 and lever member 48 to allow keeper mechanism 30 to move to a slightly less than perpendicular position within strike block 12.
- Latch bolt 22 is then free to move up ramped surface 26 and into a fully released condition as illustrated in FIGURE 3.
- Roller 46 mounted to pin 44 provides for a smoother operation of keeper mechanism 30 as latch bolt 22 retracts keeper mechanism 30 into strike block 12 out of the path of ramped surface 26 to allow latch bolt 22 to completely retract within door 24.
- latch bolt 22 Once latch bolt 22 has cleared keeper mechanism 30, keeper mechanism 30 will automatically return to the closed and locked position due to springs 40, 60 and 62 to the position illustrated in FIGURE 2.
- strike plate 14 forces latch bolt 22 back into door 24.
- Latch bolt 22 stays within door 24 until latch bolt 22 has cleared keeper mechanism 30 at which time latch bolt 22 due to the spring loading forces on latch bolt 22 reenters strike block 12 below dogging member 42 as illustrated in FIGURE 2.
- a fail-safe operation of the present door release mechanism 10 can be accomplished by changing the operation of solenoid 36 from a push solenoid to a spring loaded pull solenoid.
- push plunger 66 In the unpowered condition, push plunger 66 is spring loaded to pin 50. When power is applied, push plunger 66 moves out of the way and dogging member 42 and lever member 48 are lockea.
- the present invention provides for a door release mechanism that is substantially concealed and not visible when the door is closed.
- the present release mechanism is automatically actuated through operation of a solenoid thereby rendering the present release mechanism invulnerable to attack.
Landscapes
- Closing And Opening Devices For Wings, And Checks For Wings (AREA)
Abstract
Description
- This invention relates to security devices, and more particularly to a concealed door release mechanism for doors utilizing latch bolts.
- In security devices it is desirable to automatically release locks having latch bolts or guarded latch bolts. Such bolts are carried by a door and are received in a strike which is closed by a jamb. Previously developed automatically released devices have required modification of the lip of the jamb in which the release mechanism was mounted. In addition, such prior devices were vulnerable to attack at the point where the release mechanism was exposed outside the door jamb.
- A need has thus arisen for a release mechanism that is completely concealed within the door jamb. A need has further arisen for a release mechanism that will release the latch bolt as the door is pushed to the open position.
- In accordance with the present invention, a door release mechanism is provided which is concealed within a door jamb.
- In accordance with the present invention, a door release mechanism for a door having a latch bolt is provided. A strike block is adapted to receive the latch bolt. Structure is provided within the strike block for urging the latch bolt into the door to thereby open the door. Structure is further provided within the strike block for preventing the latch bolt from being urged into the door to thereby maintain the door closed.
- In accordance with another aspect of the present invention, a door release mechanism for a door having a latch bolt is provided. A strike block is adapted to receive the latch bolt and includes a ramped surface over which the latch bolt travels. The ramp surface urges the latch bolt into the door to thereby open the door. A pivoting keeper is disposed within the strike block for selectively allowing the latch bolt to travel over the ramped surface to the door open position. Structure is provided for controlling the pivoting keeper for controlling the position of the pivoting keeper with respect to the ramped surface of the strike block.
- For a more complete understanding of the present invention and for further advantages thereof, reference is now made to the following Detailed Description taken in conjunction with the accompanying Drawings in which:
- FIGURE 1 is a perspective view of the present door release mechanism;
- FIGURE 2 is a side elevational view of the door release mechanism shown in FIGURE 1 in the closed and locked position; and
- FIGURE 3 is a side elevational view of the door release mechanism shown in FIGURE 1 in the open and unlocked position.
- Referring simultaneously to FIGURES 1 and 2, the present door release mechanism is illustrated and is generally identified by the
numeral 10.Door release mechanism 10 is mounted within astrike block 12 which is covered by astrike plate 14.Strike plate 14 includesapertures 16 for mountingstrike plate 14 andstrike block 12 to a door jamb (not shown).Strike block 12 is mounted tostrike plate 14 utilizingscrews 20. -
Strike block 12 receives alatch bolt 22 carried by adoor 24 whendoor 24 is in the closed position. Latchbolt 22 is retracted withindoor 24 asdoor 24 is opened. Latchbolt 22 is spring loaded and is extended intostrike block 12 whendoor 24 is closed. - Disposed within
strike block 12 is a rampedsurface 26 over which latch bolt 22 travels. Also included withinstrike block 12 and disposed within aslot 28 within rampedsurface 26 is akeeper mechanism 30.Keeper mechanism 30 is pivotable aboutpin 32 withinstrike block 12. As illustrated in FIGURE 2,keeper mechanism 30 is in the closed position such thatlatch bolt 22 is positioned belowkeeper mechanism 30 at the bottom end of rampedsurface 26. - Interconnected to strike
block 12 is asolenoid 36 which when actuated causeskeeper mechanism 30 to be retracted withinstrike block 12 aslatch bolt 22 moves across rampedsurface 26 from the bottom end of rampedsurface 26 to the top end thereof. Such movement thereby enablesdoor 24 to open. In the open position ofdoor 24,keeper mechanism 30 automatically returns to the position illustrated in FIGURE 2. - Referring more specifically to FIGURE 2, associated with
pin 32 is areturn spring 40 which maintainskeeper mechanism 30 in the position as illustrated in FIGURE 2. Interconnected tokeeper mechanism 30 is a channel-like dogging member 42 which is pivotally interconnected tokeeper mechanism 30 via apin 44. Also mounted onpin 44 is aroller 46. Pivotally interconnected to doggingmember 42 is alever member 48 via apin 50. Whensolenoid 36 is energized,members keeper mechanism 30 to pivot in a clockwise direction aboutpin 32. Aslatch bolt 22 moves up rampedsurface 26, it is simultaneously forced intodoor 24 thus releasingdoor 24 near the end of travel oflatch bolt 22. A short continuation of rampedsurface 26 is provided by abevel 56 on the opening instrike plate 14. Aslight bevel 22a may be provided onlatch bolt 22 to provide a smoother operation oflatch bolt 22 as it travels over rampedsurface 26. - Referring simultaneously to FIGURES 2 and 3, FIGURE 2 illustrates
keeper mechanism 30 in the closed position while FIGURE 3 illustrateskeeper mechanism 30 in the open position. In the open position ofkeeper mechanism 30,keeper mechanism 30 is biased to its full counterclockwise position aroundpin 32 withmembers spring 40biases keeper mechanism 30 to the closed position as illustrated in FIGURE 2. - A
bias spring 60 also extends aroundpin 32 and engages doggingmember 42. Biasspring 60 maintains doggingmember 42 in its fully counterclockwise position aboutpin 44. Atorsion spring 62 is mounted aroundpin 50 to holdlever member 48 in -its fully clockwise position aboutpin 50. Torsionspring 62 may be held within a groove inlever member 48. Springs 40, 60 and 62,bias keeper mechanism 30,dogging member 42 andlever member 48 in the position shown in FIGURE 2. - A
push plunger 66 extends fromsolenoid 36 intostrike block 12 whensolenoid 36 is electrically energized. Whensolenoid 36 is energized,push plunger 66 engagespin 50 interconnectingdogging member 42 andlever member 48 to allowkeeper mechanism 30 to move to a slightly less than perpendicular position withinstrike block 12.Latch bolt 22 is then free to move up rampedsurface 26 and into a fully released condition as illustrated in FIGURE 3.Roller 46 mounted topin 44 provides for a smoother operation ofkeeper mechanism 30 aslatch bolt 22retracts keeper mechanism 30 intostrike block 12 out of the path of rampedsurface 26 to allowlatch bolt 22 to completely retract withindoor 24. - Once
latch bolt 22 has clearedkeeper mechanism 30,keeper mechanism 30 will automatically return to the closed and locked position due tosprings door 24 is again closed,strike plate 14 forces latch bolt 22 back intodoor 24. Latchbolt 22 stays withindoor 24 untillatch bolt 22 has clearedkeeper mechanism 30 at which time latch bolt 22 due to the spring loading forces onlatch bolt 22reenters strike block 12 below doggingmember 42 as illustrated in FIGURE 2. - A fail-safe operation of the present
door release mechanism 10 can be accomplished by changing the operation ofsolenoid 36 from a push solenoid to a spring loaded pull solenoid. In the unpowered condition,push plunger 66 is spring loaded topin 50. When power is applied, pushplunger 66 moves out of the way and doggingmember 42 andlever member 48 are lockea. - It therefore can be seen that the present invention provides for a door release mechanism that is substantially concealed and not visible when the door is closed. The present release mechanism is automatically actuated through operation of a solenoid thereby rendering the present release mechanism invulnerable to attack.
- Whereas the present invention has been described with respect to specific embodiments thereof, it will be understood that various changes and modifications will be suggested to one skilled in the art and it is intended to encompass such changes and modifications as fall within the scope of the appended claims.
Claims (10)
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
US57888684A | 1984-02-10 | 1984-02-10 | |
US578886 | 1984-02-10 |
Publications (2)
Publication Number | Publication Date |
---|---|
EP0153627A1 true EP0153627A1 (en) | 1985-09-04 |
EP0153627B1 EP0153627B1 (en) | 1988-09-21 |
Family
ID=24314714
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP19850101284 Expired EP0153627B1 (en) | 1984-02-10 | 1985-02-07 | Concealed door release mechanism |
Country Status (2)
Country | Link |
---|---|
EP (1) | EP0153627B1 (en) |
DE (1) | DE3565145D1 (en) |
Cited By (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
GB2243865A (en) * | 1990-05-08 | 1991-11-13 | Banham Patent Locks Ltd | Latch |
WO2005038173A1 (en) * | 2003-10-13 | 2005-04-28 | Assa Abloy Sicherheitstechnik Gmbh | Door opener |
Citations (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US4181338A (en) * | 1977-06-09 | 1980-01-01 | Sterling John G | Strike assembly |
GB2111113A (en) * | 1981-09-17 | 1983-06-29 | Clarke Instr Limited | Striking plate for latches |
-
1985
- 1985-02-07 EP EP19850101284 patent/EP0153627B1/en not_active Expired
- 1985-02-07 DE DE8585101284T patent/DE3565145D1/en not_active Expired
Patent Citations (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US4181338A (en) * | 1977-06-09 | 1980-01-01 | Sterling John G | Strike assembly |
GB2111113A (en) * | 1981-09-17 | 1983-06-29 | Clarke Instr Limited | Striking plate for latches |
Cited By (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
GB2243865A (en) * | 1990-05-08 | 1991-11-13 | Banham Patent Locks Ltd | Latch |
GB2243865B (en) * | 1990-05-08 | 1994-05-11 | Banham Patent Locks Ltd | Locking latches |
WO2005038173A1 (en) * | 2003-10-13 | 2005-04-28 | Assa Abloy Sicherheitstechnik Gmbh | Door opener |
JP2007508477A (en) * | 2003-10-13 | 2007-04-05 | アサ・アプロイ・ジシャルハイツテヒニク・ゲーエムベーハー | Door opener |
Also Published As
Publication number | Publication date |
---|---|
DE3565145D1 (en) | 1988-10-27 |
EP0153627B1 (en) | 1988-09-21 |
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