GB2378982A - Drive mechansim for shoot bolts - Google Patents

Drive mechansim for shoot bolts Download PDF

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Publication number
GB2378982A
GB2378982A GB0219566A GB0219566A GB2378982A GB 2378982 A GB2378982 A GB 2378982A GB 0219566 A GB0219566 A GB 0219566A GB 0219566 A GB0219566 A GB 0219566A GB 2378982 A GB2378982 A GB 2378982A
Authority
GB
United Kingdom
Prior art keywords
drive mechanism
drive
mechanism according
shoot bolt
arms
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
Application number
GB0219566A
Other versions
GB2378982B (en
GB0219566D0 (en
Inventor
Terence James Dolman
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Trojan Hardware and Design Ltd
Original Assignee
Trojan Hardware and Design Ltd
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Priority claimed from GB0120512A external-priority patent/GB0120512D0/en
Priority claimed from GB0203484A external-priority patent/GB0203484D0/en
Application filed by Trojan Hardware and Design Ltd filed Critical Trojan Hardware and Design Ltd
Publication of GB0219566D0 publication Critical patent/GB0219566D0/en
Publication of GB2378982A publication Critical patent/GB2378982A/en
Application granted granted Critical
Publication of GB2378982B publication Critical patent/GB2378982B/en
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

Links

Classifications

    • E—FIXED CONSTRUCTIONS
    • E05—LOCKS; KEYS; WINDOW OR DOOR FITTINGS; SAFES
    • E05C—BOLTS OR FASTENING DEVICES FOR WINGS, SPECIALLY FOR DOORS OR WINDOWS
    • E05C9/00—Arrangements of simultaneously actuated bolts or other securing devices at well-separated positions on the same wing
    • E05C9/04—Arrangements of simultaneously actuated bolts or other securing devices at well-separated positions on the same wing with two sliding bars moved in opposite directions when fastening or unfastening
    • E05C9/041—Arrangements of simultaneously actuated bolts or other securing devices at well-separated positions on the same wing with two sliding bars moved in opposite directions when fastening or unfastening with rack and pinion mechanism

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Power-Operated Mechanisms For Wings (AREA)

Abstract

A drive mechanism for use in a shoot bolt mechanism comprises a housing 12 for insertion into a mortise which contains a quadrant pinion 24 and drive rack 26 arranged to drive one 14, of a pair of shoot bolt arms 14, 16. Reversing pinions 20 mounted on stationary axles 21 and engaging racks 22, 23 provided on the bolt arms 14, 16 are located between such shoot bolt arms for urging them in opposite directions when the one is driven. The reversing pinions 20 are located outside the housing 12 and beneath a cover plate 18.

Description

<Desc/Clms Page number 1>
DRIVE MECHANISM FOR SHOOT BOLTS This invention relates to drive mechanisms for use in shoot bolt assemblies.
Such mechanisms ordinarily comprise a housing for a drive mechanism which is adapted to be accommodated in a mortise or like recess in an edge member of a window or door. Two ordinarily strip-like bolt arms extend in opposite directions from the drive mechanism, to be moved longitudinally by the mechanism. The bolt arms are usually adapted to be accommodated in shallow channels formed in the edge face of the edge member, end portions of the arms selectively projecting beyond guide members, secured to corners of the window or door, for engagement with keeps on an adjacent window or door frame. In an unlocked condition of the mechanism, the bolt ends are drawn back from the keeps to permit the window or door to be opened.
A problem arises with modern door and window constructions in that the thickness or form of door and window edge members imposes severe constraints upon the permissible maximum width of a mortise or like recess for receiving a shoot bolt drive housing and accordingly upon the design of such drive mechanism.
It is an object of this invention to provide a shoot bolt drive mechanism which allows the use of a housing of slim proportions.
According to the present invention, there is provided a drive mechanism for use in a shoot bolt mechanism which comprises a housing for insertion into a mortise and containing drive means arranged to drive one of a pair of shoot bolt arms, reversing means operative between such shoot bolt arms for urging such arms in opposite directions when the one is driven,
<Desc/Clms Page number 2>
such reversing means being located outside the housing and beneath a cover plate therefor.
In order conveniently to accommodate a pair of bolt arms in a rebate in the edge face of a door or window, it is generally convenient for those bolt arms to be substantially co-planar at least at their driven ends. The positioning of a reversing means there, imposes a minimum width on the drive arrangement. By moving that reversing means outside the drive housing, we enable the drive housing to be made significantly thinner, thus allowing the housing to be accommodated in a significantly narrower mortise in the door or window edge member. The reversing mechanism can be accommodated in a rebate in the door or window edge face.
In some preferred embodiments of the invention, said reversing means comprises a pinion mounted on a stationary axle and engaging a rack provided on each said bolt arm. Preferably, said reversing means comprises a pair of pinions mounted on spaced, parallel stationary axles and each engaging racks provided on said bolt arms.
Advantageously, said drive means comprises a drive pinion which is rotatable by a user, for example by means of a handle or key, which pinion engages a rack for driving said one shoot bolt arm.
Preferably, such drive rack is separate from, but keyed to, said one shoot bolt arm. The drive rack may engage the shoot bolt arm by means of one or more nibs protruding from the rack and co-operating with recesses in the shoot bolt arm. There may be two nibs on the rack.
The drive pinion is suitably a quadrant gear.
In many preferred embodiments of the invention, the rotation axis of said drive pinion is normal to that of the or each reversing pinion.
<Desc/Clms Page number 3>
Advantageously, said housing comprises opposed front and rear housing plates which, between themselves, provide guide means guiding movement of the drive means.
Preferably, said cover plate provides guide means for guiding movement of said shoot bolt arms.
In some such embodiments, such cover plate guide means comprise side rails for engaging sides of said shoot bolt arms. This controls side-to-side movement of the driven ends of the arms, and helps to maintain proper engagement of the reversing means.
Preferably, said shoot bolt arms are provided with elongate through-holes.
This allows the cover plate to be provided with guide means comprising studs for engaging such elongate through-holes, which further promotes efficient guidance of the arms at the drive mechanism.
Such elongate through-holes may also be useful in permitting fixing of the drive mechanism into place: if said cover plate includes through-holes, in register with said elongate through-holes, for the reception of fixing screws or the like, as is preferred, fixing of the drive mechanism to the door or window is facilitated.
The shoot bolt arms may each be of one-piece construction, or at least one shoot bolt arm may comprise a transmission bar operatively coupled to said drive means and arranged to transmit locking and unlocking forces to a bolt member.
The bolt arms are suitable substantially identical, since this greatly simplifies manufacture, packing and assembly, and they may be formed from stainless steel.
<Desc/Clms Page number 4>
A preferred embodiment of the invention will now be described by way of example with reference to the accompanying drawings, in which :- Figure I is a top plan view of a drive mechanism according to the present invention, shown without the cover; Figure 2 is a view, partly in cross-section, from a first side of the drive mechanism of Figure 1 with the cover in place and with a drive housing faceplate removed; Figure 3 is a top plan view of the drive mechanism of Figure 1, with the cover in place; and Figure 4 shows a side view, from the side opposite to that shown in Figure 2, of the drive mechanism of Figure 1, with the cover in place.
Figures 1 to 4 of the accompanying drawings show a preferred embodiment of drive mechanism according to the present invention.
Drive housing 12, constituted by front and rear face plates 12a, 12b is provided with drive means in the form of a quadrant gear 24 rotatably mounted in the drive housing 12 and engaging a drive rack 26, mounted slidably within the drive housing 12. Rotation of the quadrant gear 24 by a handle or other rotation means (not shown) therefore causes linear movement of the drive rack 26. The drive housing face plates 12a, 12b are suitably pressed or die-cast pressed out of metal materials, such as an aluminium alloy.
The mechanism is further provided with reversing means 50 mounted on the top of the drive housing 12. The reversing means 50 comprises a first transmission bar 14 of a shoot bolt arm extending away from the drive housing 12. Two nibs 28 of the drive rack 26 extend out of the drive
<Desc/Clms Page number 5>
housing and engage with recesses 37 in the first transmission bar 14. Accordingly the first transmission bar 14 is driven to extend and retract with respect to the drive housing 12.
Reversing means 50 comprises a racked portion 22 on the first transmission bar 14 that engages two reversing pinions 20 mounted on fixed axles 21 on the drive housing 12. The pinions 20 are driven by the first transmission bar 14 as it extends or retracts. The reversing pinions 20 in turn engage a racked portion 23 of a second transmission bar 16 of a second shoot bolt arm which extends in an opposite direction to that in which the first transmission bar extends. The pinions 20 accordingly drive the second transmission bar 16 in an opposite direction to that in which the first transmission bar 14 is driven.
The transmission bars 14,16 are of identical manufacture and are manufactured from stainless steel for high strength and durability.
A cover plate 18 is provided over the drive housing 12 such that the reversing means 50 (including the reversing pinions 20 and racked portions 22,23 of each transmission bar 14,16) is enclosed and sandwiched between the cover plate 18 and the housing 12. The cover 18 also acts to guide the movement of the transmission bars 14,16 such that they are restricted to movement in one linear direction. Firstly, this is done by the side walls 40 of the cover 18, which extend to either side of each transmission bar 14,16. These define a channel in which the transmission bars 14,16 are slidably guided. Secondly, the cover 18 is provided with two guide studs 32 each of which protrudes into a guide slot 30 in one of the transmission bars 14,16. This further restricts the transmission bars 14,16 to slide in only one direction.
<Desc/Clms Page number 6>
The cover 18 is located onto the drive housing 12 by means of a cover nib 36. This is located in the centre of the surface of the housing and engages in a corresponding aperture 42 in the cover 18.
The cover nib 36 has elongate form and hence prevents rotation of the cover 18. The cover 18, and hence the entire mechanism 10 is secured to the object to be locked by means of screws, bolts or the like passed through screw holes 34 in the cover and then through the guide slots 30 in each transmission bar.
The front face plate 12a of the drive mechanism housing 12 includes a part circular recess 25 for receiving a part annular projection (not shown) on the quadrant gear 24 in order to guide that quadrant geat in its rotational movement, and also includes a straight, elongate recess 27 for guiding the rack 26 in its rectilinear movement.

Claims (15)

  1. CLAIMS 1. A drive mechanism for use in a shoot bolt mechanism which comprises a housing for insertion into a mortise and containing drive means arranged to drive one of a pair of shoot bolt arms, reversing means operative between such shoot bolt arms for urging such arms in opposite directions when the one is driven, such reversing means being located outside the housing and beneath a cover plate therefor.
  2. 2. A drive mechanism according to claim 1, wherein said reversing means comprises a pinion mounted on a stationary axle and engaging a rack provided on each said bolt arm.
  3. 3. A drive mechanism according to claim 2, wherein said reversing means comprises a pair of pinions mounted on spaced, parallel stationary axles and each engaging racks provided on said bolt arms.
  4. 4. A drive mechanism according to any preceding claim, wherein said drive means comprises a drive pinion which is rotatable by a user and which engages a rack for driving said one shoot bolt arm.
  5. 5. A drive mechanism according to claim 4, wherein said rack is separate from, but keyed to, said one shoot bolt arm.
  6. 6. A drive mechanism according to claim 4 or 5, wherein said drive pinion is a quadrant gear.
  7. 7. A drive mechanism according to claim 2 or 3 and any of claims 4 to 6, wherein the rotation axis of said drive pinion is normal to that of the or each reversing pinion.
    <Desc/Clms Page number 8>
  8. 8. A drive mechanism according to any preceding claim, wherein said housing comprises opposed front and rear housing plates which, between themselves, provide guide means guiding movement of the drive means.
  9. 9. A drive mechanism according to any preceding claim, wherein said cover plate provides guide means for guiding movement of said shoot bolt arms.
  10. 10. A drive mechanism according to claim 9, wherein said cover plate guide means comprise side rails for engaging sides of said shoot bolt arms.
  11. 11. A drive mechanism according to any preceding claim, wherein said shoot bolt arms are provided with elongate through-holes.
  12. 12. A drive mechanism according to claim 9 or 10 and 11, wherein said cover plate guide means comprise studs for engaging such elongate through-holes.
  13. 13. A drive mechanism according to claim 11 or 12, wherein said cover plate includes through-holes, in register with said elongate throughholes, for the reception of fixing screws or the like.
  14. 14. A shoot bolt mechanism incorporating a drive mechanism according to any preceding claim in which at least one shoot bolt arm comprises a transmission bar operatively coupled to said drive means and arranged to transmit locking and unlocking forces to a bolt member.
  15. 15. A drive mechanism for a shoot bolt, such drive mechanism being substantially as herein described with reference to the accompanying drawings.
    15. A drive mechanism for a shoot bolt, such drive mechanism being substantially as herein described with reference to the accompanying drawings.
    <Desc/Clms Page number 9>
    Amendments to the claims have been filed as follows
    1. A drive mechanism for use in a shoot bolt mechanism which comprises a housing for insertion into a mortise and containing drive means arranged to drive one of a pair of shoot bolt arms, reversing means operative between such shoot bolt arms for urging such arms in opposite directions when the one is driven, such reversing means being located outside the housing and between the housing and a cover plate therefor.
    2. A drive mechanism according to claim 1, wherein said reversing means comprises a pinion mounted on a stationary axle and engaging a rack provided on each said bolt arm.
    3. A drive mechanism according to claim 2, wherein said reversing means comprises a pair of pinions mounted on spaced, parallel stationary axles and each engaging racks provided on said bolt arms.
    4. A drive mechanism according to any preceding claim, wherein said drive means comprises a drive pinion which is rotatable by a user and which engages a rack for driving said one shoot bolt arm.
    5. A drive mechanism according to claim 4, wherein said rack is separate from, but keyed to, said one shoot bolt arm.
    6. A drive mechanism according to claim 4 or 5, wherein said drive pinion is a quadrant gear.
    7. A drive mechanism according to claim 2 or 3 and any of claims 4 to 6, wherein the rotation axis of said drive pinion is normal to that of the or each reversing pinion.
    <Desc/Clms Page number 10>
    8. A drive mechanism according to any preceding claim, wherein said housing comprises opposed front and rear housing plates which, between themselves, provide guide means guiding movement of the drive means.
    9. A drive mechanism according to any preceding claim, wherein said cover plate provides guide means for guiding movement of said shoot bolt arms.
    10. A drive mechanism according to claim 9, wherein said cover plate guide means comprise side rails for engaging sides of said shoot bolt arms.
    11. A drive mechanism according to any preceding claim, wherein said shoot bolt arms are provided with elongate through-holes.
    12. A drive mechanism according to claim 9 or 10 and 11, wherein said cover plate guide means comprise studs for engaging such elongate through-holes.
    13. A drive mechanism according to claim 11 or 12, wherein said cover plate includes through-holes, in register with said elongate throughholes, for the reception of fixing screws or the like.
    14. A shoot bolt mechanism incorporating a drive mechanism according to any preceding claim in which at least one shoot bolt arm comprises a transmission bar operatively coupled to said drive means and arranged to transmit locking and unlocking forces to a bolt member.
GB0219566A 2001-08-23 2002-08-22 Drive mechanism for shoot bolts Expired - Lifetime GB2378982B (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
GB0120512A GB0120512D0 (en) 2001-08-23 2001-08-23 Shoot bolt mechanism
GB0203484A GB0203484D0 (en) 2002-02-14 2002-02-14 Drive mechanism

Publications (3)

Publication Number Publication Date
GB0219566D0 GB0219566D0 (en) 2002-10-02
GB2378982A true GB2378982A (en) 2003-02-26
GB2378982B GB2378982B (en) 2006-02-22

Family

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Family Applications (1)

Application Number Title Priority Date Filing Date
GB0219566A Expired - Lifetime GB2378982B (en) 2001-08-23 2002-08-22 Drive mechanism for shoot bolts

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GB (1) GB2378982B (en)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2861116A1 (en) * 2003-10-21 2005-04-22 Bezault Sas Security device for multi-point lock, has control box comprising pinion with tooth cut at its upper part, where tooth slides on another tooth of rack until indexed stop position of pinion rotation to lock against tooth of rack
GB2436118A (en) * 2006-03-18 2007-09-19 Trojan Hardware & Designs Ltd Espagnolette mechanism
GB2467329A (en) * 2009-01-29 2010-08-04 Christopher Sean Jones Door lock having two locking bolts driven simultaneously in opposite directions

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2252351A (en) * 1991-01-15 1992-08-05 Crompton Ltd Operating mechanism for espagnolette fastening systems
EP0501803A1 (en) * 1991-02-28 1992-09-02 Regent Lock Company Limited An espagnolette mechanism
GB2289709A (en) * 1994-04-22 1995-11-29 Derek King Espagnolette operating mechanism
GB2323122A (en) * 1997-03-14 1998-09-16 Nt Worcester Parsons Limited Double shoot bolt fastening

Family Cites Families (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE19737538C2 (en) * 1997-08-28 2000-11-23 Siegenia Frank Kg Fastening device
DE19754880C5 (en) * 1997-12-10 2004-10-21 W. Hautau Gmbh Reverse gear with offset gear box

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2252351A (en) * 1991-01-15 1992-08-05 Crompton Ltd Operating mechanism for espagnolette fastening systems
EP0501803A1 (en) * 1991-02-28 1992-09-02 Regent Lock Company Limited An espagnolette mechanism
GB2289709A (en) * 1994-04-22 1995-11-29 Derek King Espagnolette operating mechanism
GB2323122A (en) * 1997-03-14 1998-09-16 Nt Worcester Parsons Limited Double shoot bolt fastening

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2861116A1 (en) * 2003-10-21 2005-04-22 Bezault Sas Security device for multi-point lock, has control box comprising pinion with tooth cut at its upper part, where tooth slides on another tooth of rack until indexed stop position of pinion rotation to lock against tooth of rack
GB2436118A (en) * 2006-03-18 2007-09-19 Trojan Hardware & Designs Ltd Espagnolette mechanism
GB2467329A (en) * 2009-01-29 2010-08-04 Christopher Sean Jones Door lock having two locking bolts driven simultaneously in opposite directions
WO2010086661A2 (en) 2009-01-29 2010-08-05 Christopher Sean Jones Door locks
GB2479102B (en) * 2009-01-29 2015-09-16 Christopher Sean Jones Door locks with locking bolts inside the handle

Also Published As

Publication number Publication date
GB2378982B (en) 2006-02-22
GB0219566D0 (en) 2002-10-02

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