GB2105400A - Lockable handle - Google Patents

Abstract

A lockable handle device 1 can be operated from outside a closure such as an up-and-over door in an unlocked state and can be operated from inside the closure in the locked state by an over-riding device. Handle 4 when unlocked can be rotated to turn shaft 8 and yoke 9 and hence to withdraw bolts (not shown). In the locked state the handle is held in recess 3, flush with the door, by bolt 6 operated by barrel-lock 7 and engaging in a cut-out of handle shank 5. If bolt 6 is withdrawn by operating lock 7, spring 14 urges the handle to the ejected position. From inside the closure the bolt 6 may be withdrawn by depressing a knob 24 integral with bolt 6 and projecting from housing 17. Inside handle 11 may then be used to lock the handle device from outside, handle 4 is depressed until it is in recess 3, whereupon bolt 6 latches into the shank recess. <IMAGE>

Description

SPECIFICATION Lockable handle Technical Field of the Invention The invention relates to a lockable handle, particularly of the kind which can be operated from outside a closure to which it is fitted when it is in the unlocked state and which can be operated from inside the closure in the locked state.

Disclosure of the Invention According to one aspect of the invention there is provided a lockable handle which can be operated from outside a closure to which it is fitted when it is in the unlocked state and which can be operated from inside the closure in the locked state, comprising a housing, a handle carried by the housing for operating from the outside of a closure in use a closure opening and closing mechanism, a key - operated barrel lock operable from outside the closure for locking the handle in a locked state against operation of said mechanism, and an over-ride device carried by the housing and in use inside the closure and operative to override the locked condition of the lock and handle from inside the closure so that the handle is realised and said mechanism can be operated thereby from inside the closure.

According to a second aspect of the invention there is provided a closure including a lockable handle as hereinbefore defined.

The handle may be mounted on a shaft for rotation to operate the mechanism, the shaft also being movable longitudinally under the pressure of biasing means which urges the handle away from the housing in the unlocked state so that the handle can be turned to operate said mechanism.

The handle may lie substantially flush with a surface of the housing in the locked state.

The over-ride device may comprise a bolt of the lock and a manually grippable part thereof for moving the bolt out of locking engagement with the handle.

A lockable handle embodying the invention is hereinafter described, by way of example, with reference to the accompanying drawings.

Brief Description of the Drawings Fig. 1 is a schematic perspective view of the lockable handle from the rear, in other words from inside the closure (not shown) as considered in use; Fig. 2 is a front elevational view; Fig. 3 is transverse view partly in section; Fig. 4 is a rear elevational view; Fig. 5 and 6 are respective side and plan views of a locking bolt and override device; and Figs. 7 and 8 are respective end elevational and plan views of a cover plate.

Referring to the drawings, the lockable handle 1 shown comprises a housing 2, the front (outside as considered in use) face 2 of which has a recess 3 for receiving in flush fitting engagement in the locked state a handle 4. The handle 4 is ofT' shape, the shank 5 of the 'T' having a cut-out or slot (not shown) for receiving a reciprocable locking bolt 6 of a key-operated barrel lock 7. The shank 5 is secured to a square-section shaft 8 to which is fixed a yoke 9 which is connectible via screw or bolt holes 10 to an opening and closing operating mechanism (not shown) of a closure to which the lockable handle 1 is to be fitted. The shaft 8 extends beyond the yoke 9 and at its free end mounts an auxiliary 'T' - handle or other manually grippabie part 11.

The shank 5 terminates in a boss 13 of the housing 2 through which the draft 8 extends.

Biaising means in the form of a spring 14 is in the boss 13 and acts between a shoulder 1 5 of the shank 5 and an end 16 of the boss 13 normally to urge the handle 4 out of the recess 3, to the position shown in Fig. 3.

The lock 7 is mounted in an extension 1 7 of the boss. The lock 7 has at the end of the barrel remote from the key hole a projecting eccentric dog or spigot which is received in an aperture 1 8 in the reciprocable lock bolt 6. The bolt 6 is mounted in a slide-way in the extension 1 7 and is maintained there by a cover plate 19 which has a lug 20 on which a spring (not shown) bears, the spring also being received in a blind hole 21 in one end of the bolt 6. The other end of the bolt has a cam surface 22 for easing entry into the cut-out or slot in the shank 5 of the handle 4. The cover plate 19 also has a slot 23 through it through which a device in the form of a finger grippable part or lever 24 solid with the bolt 6 projects.The cover 1 9 plate is secured to the extension by securing means such as screws or rivets passing through holes 25.

In use, the lockable handle 1 is mounted on or fitted to a closure such as an up-and-over garage door. The housing front plate 2 is fitted flush with the front or outer face of the floor. The lockable handle 1 is secured to the door by screws or bolts passing through holes 26 in the recess 3 in which the handle 4 is received in flush fitting relation with the outer face of the housing and is thus also in flush fitting relationship with the outer face of the door, in the locked condition of the handle. The yoke 9 is connected with the opening and closing mechanism such as bolts which engage with keepers to keep the door closed.

The sliding bolt 6 of the lock 7 is generally normally urged by the spring situated between lug 20 and the end of the blind hole 21 upwardly as viewed in Fig. 1. When the handle 4 is pushed into the recess 3, the shoulder 1 5 bears on the spring 14 and compresses it, the shaft 8 moving with the handle 4 with which it is solid and carrying the auxiliary handle 11 with it, but leaving the yoke 9 in position adjacent the end of the boss 13. When the cut-out or slot in the shank 5 of the handle 4 is opposite the bolt 6, the bolt 6 slides under pressure of the spring situated between the lug 20 and the end of the blind hole 21 to engage in the cut-out or slot and so to hold the handle 4 in the recess 3 in the locked state. In this condition, the position of the yoke 9 is such that the rods and keepers engage to keep the door closed, in the locked state.

If it is desired to unlock the door, a key is inserted in the lock 7, and turned, so turning the barrel and the eccentric spigot or dog projecting therefrom. The spigot or dog is in the recess 18 of the bolt 6 adjacent the bottom part thereof. The only way to accommodate turning of the barrel and hence of the spigot or dog is for the bolt 6 to slide downwardly. In doing so it is retracted from the cut-out or slot in the shank 5 and as soon as it is clear thereof, the handle 4 is urged out of the recess 3 by the spring 14. The handle 4 can then be turned, so turning the yoke 9 to withdraw the bolts from their keepers and so free the door which can then be opened.

To lock the door again, the reverse procedure is followed.

If now, the door is inadvertantly locked while someone is inside the garage, the door can still be unlocked, in other words the locked state of the lockable handle can be over-ridden. To over-ride the locked state the over-ride device or part or lever 24 is gripped and is moved downwardly, as considered in Fig. 1, over the length of the slot 23.

This movement retracts the bolt 6 a distance equivalent to the length of the recess 23 and at the same time retracts the bolt 6 from the cut-out or slot in the shank 5, just as if the bolt was retracted from outside using the key. The handle 4 now is again urged out of the recess 3 in the housing 2, the hand grip 11 can be grasped and turned to turn the yoke 9 and so disengage the bolts and keepers.

The boss 13, it will be understood has a blind cut-out or rebate which acts like a cam and the yoke 9 has a projecting spigot which is a cam follower which runs round the rebate from one end to the other during a turning movement.

Stops at each end of the rebate limit the turning movement.

It will be understood that the lockable handle 1 embodying the invention is substantially vandalproof in view of the flush fitting and because the fixing holes 26 are in use hidden by the handle 4 in the locked state, and also provides for operation from inside a door or closure to which it is fitted even in the locked state.

Claims (6)

1. A lockable handle which can be operated from outside a closure to which it is fitted when it is in the unlocked state and which can be operated from inside the closure in the locked state, comprising a housing, a handle carried by the housing for operating from the outside of a closure in use a closure opening and closing mechanism, a key - operated barrel lock operable from outside the closure for locking the handle in a locked state against operation of said mechanism, and an override device carried by the housing and in use inside the closure and operative to override the locked condition of the lock and handle from inside the closure so that the handle is released and said mechanism can be operated thereby from inside the closure.

2. A lockable handle according to Claim 1, the handle being mounted on a shaft for rotation to operate the mechanism, the shaft also being movable longitudinally under the pressure of biasing means which urges the handle away from the housing in the unlocked state so that the handle can be turned to operate said mechanism.

3. A lockable handle according to Claim 2, the handle lying substantially flush with a surface of the housing in the locked state.

4. A lockable handling according to Claim 3, the over-ride device compressing a bolt of the lock and a manually grippable part thereof for moving the bolt out of locking engagement with the handle.

5. A lockable handle which can be operated from outside a closure to which it is fitted when it is in the unlocked state and which can be operated from inside the closure in the locked state, substantially as hereinbefore described with reference to and as shown in the accompanying drawings.

6. A closure such as an up-and-over garage door, including a lockable handle according to any preceding claim.