EP0002381B1

EP0002381B1 - Locking handle device for casement closure

Info

Publication number: EP0002381B1
Application number: EP78300735A
Authority: EP
Inventors: Ernest Charles Daley; Henry Albert Hinton
Original assignee: Regent Lock Co Ltd
Current assignee: Regent Lock Co Ltd
Priority date: 1977-12-06
Filing date: 1978-12-04
Publication date: 1981-10-07
Also published as: NO781080L; NO146371B; DE2861142D1; GB1580094A; NO146371C; EP0002381A1

Description

The invention relates to a lockable handle device for a casement closure, which is securable by engagement of a nib of the handle device with a keeper of the frame in which the closure opens and closes, comprising an escutcheon plate for mounting on the closure, and a handle pivoted to the escutcheon plate by a pivot extending at right angles to the escutcheon plate.
Handles devices make it possible to secure a casement closure such as a window in the closed position close against a frame in which they are mounted for pivoting between open and closed positions.
A handle device is known in accordance with the prior art portion of Claim 1 in which the handle is easily grasped from outside the closure and turned by an unauthorised user if the glass of the closure, usually a window, is broken. The unauthorised user is then able to obtain unauthorised entry.
Some casement closures such as the so- called French doors are operated from a central handle by a system of rods or levers. Such a central handle and lever system is known in accordance with the disclosure of DE U 7440 047 in which the central handle is locked in the secured (closed) position by a separate lockable device which is securable to the window and which is pivotable about a pivot axis and which has a lock to prevent pivotal movement in the secured position.
With a system of this kind, considerable manufacturing and fitting costs are incurred because the system is a separate system from the handle and lever system of the closure. In addition, the pivot is situated between a finger which acts on the handle and a key-operated lock. The finger itself is also difficult to align with the handle, and is subject to wear with use. All these factors combine to cause (1) relatively easy shearing of the lock away from the locked position, with consequent ease of pivoting of the system away from the handle in the locked position in use, with easy unauthorised manipulation thereof, and (2) relatively easy slipping of the finger from the handle with again consequently easy unauthorised manipulation of the handle.
The invention as claimed is intended to remedy these drawbacks. It solves the problem of providing a unitary, lockable handle device which has a lock which cannot be prized away from locking engagement in the locked position, so providing a secure closure which is simple to manufacture and to install.
Two ways of carrying out the invention are described in detail below with reference to drawings which illustrate two specific embodiments, in which:-

Figure 1 is a longitudinal part sectional view- _'of one locking handle device in accordance with the invention;
Figure 2 is a plan view of the apparatus of Figure 1; and
Figure 3 is a longitudinal sectional view, to a larger scale than that of Figures 1 and 2, of part of a second locking handle device in accordance with the invention.

Referring to the drawings, in which like parts are indicated by like reference numerals, the handle device shown in Figures 1 and 2 is a lockable window catch 1 which has a member in the form of an escutcheon plate 2 to which is pivoted, by a pivot pin 3, a handle 4 having a hand grip part 5. The handle 4 is manually turnable between two end positions, in one of which the window is locked and in the second of which the window is unlocked. The handle 4 has a part 6 through which the pivot pin 3 passes and, between the pin 3 and the hand grip part 5, an enlarged part 7 in which is mounted a key-operated barrel lock 8. The barrel has a projecting eccentric pin or cam 9 at the opposite end of the lock to the key hole 10. The pin 9 engages in a recess- or hole 11 in a bolt 12 which is slidable in a direction at right angles to the longitudinal axis of the barrel.
An adjacent part 13 of the escutcheon plate has a groove 14 in which the bolt 12 can be received in one end position of the handle 4.
The escutcheon plate 2 is adapted for mounting on a window frame by screw holes 15, 16, 17 and 18. The lockable window catch 1 is, in use, secured to a window frame by screws through the four holes 15, 16, 17 and 18, after the-handle 4 has been turned from the one end position shown to the left (as viewed in Figure 2) in the direction of the arrow X to the other end position so that the two holes 17 and 18 are unobstructed. To close the window, it is merely necessary to return the handle 4 to the position shown in Figures 1 and 2, which action locks a nib 19 of the handle with a keeper on the window jamb (not shown).
To lock the catch and so secure the window against unauthorised entry, a key is inserted in the lock 8. The lock has the usual differ pins and spring mounted barrel pins. When the key is inserted the two sets of pins are retracted into the barrel against the springs until the barrel can be turned when the key is turned. Turning the barrel tends to move the eccentric cam 9 in an arc. To accommodate this, the bolt 12 slides to the left (as viewed in Figure 1) to engage in the groove 14. The catch is thus locked. To unlock the catch, the key is turned in the opposite sense in order to withdraw the bolt 12 into the space 12 so that it is free of the groove 14. The handle 4 can then be turned from the one end position.
In the locked state shown, the handle 4 obscures the holes 17 and 18, so preventing or hindering the unauthorised removal of screws in these holes. This helps to make the window catch vandal-proof.
The turning of the handle 4 may be assisted by the inclusion of neoprene or nylon washers 21 or 22 where shown.
Figure 3 shows a lockable window catch 100 similar to that of Figures 1 and 2, but in this case the lock 8 is a slidable spring mounted barrel lock. The barrel has a projecting pin 101 which in the one end position is received in a complementary part 102, in this case the screw hole 17 of the escutcheon plate 2. A helical spring 103 encircles the pin 101 and bears against the underside of the barrel. The bolt 12 has a recess 104 for receiving the eccentric pin 9. The recess 104 has a greater lateral extent than the lateral width of the pin 9. The bolt 12 is mounted under the pressure of a spring 105. The lock is shown just at the point where it unlocks the catch. The key (not shown) has been inserted and turned so that the bolt 12 has been moved to the right (as viewed) and takes up the position shown. Th lock slides upwardly (as viewed) under the pressure of the spring 103 to the position shown in dashed lines. This it does instantaneously, so withdrawing the pin 101 from the screw hole 17. The handle 4 is then free to turn from the one to the second end position. To lock the catch when the handle has been returned to the one end position, it is merely necessary to depress the barrel by thumb or finger pressure. When the bolt 12 reaches a position opposite the groove 14 it moves under pressure of the spring 105 into the groove, the enlarged part of the recess 104 allowing this travel without hindrance from the eccentric pin 9. The handle and escutcheon plate are then locked together once more.
It will be understood that the ejection of the barrel is controlled by a screw mounted with its head in a longitudinally disposed slot (also not shown). In the full line position of the barrel the screw head is at the upper blind end of the slot. In the dashed line position the head of the screw and the bottom of the slot are in engagement, so preventing movement of the barrel beyond the dashed line position shown in Figure 3. The slot may in the barrel or in the part 7 while the screw may be in the part 7 or in the barrel.
In the one end position, the screw holes 17 and 18 (of which only one is shown) are obstructed by the part 7.
Also, the part 7 has a stop (not shown) which prevents turning of the handle 4 beyond the one end position.
The stop is a depending projection at one side of the part 7 which engages the side of the escutcheon plate when the one end position is reached: The stop therefore provides a arc of turning of the handle to the one end (window) position. The stop is provided in both the catches of Figures 1 and 2, or 3.

Claims

1. A lockable handle device for a casement closure, which is securable by engagement of a nib (19) of the handle device with a keeper of the frame in which the closure opens and closes, comprising an escutcheon plate (2) for mounting on the closure, and a handle (4) pivoted to the escutcheon plate by a pivot (3) extending at right angles to the esdutcheon plate, characterised by a key-operated barrel lock (8) for locking the handle against pivotal motion when the nib (19) is engaged with the keeper and by the lock (8) being positioned in an enlarged part (7) of the handle (4) intermediate the pivot (3) and the grip part (5) of the handle (4).

2. A lockable handle device according to Claim 1, characterised in that-the lock (8) is a slidable spring-mounted barrel key-operated lock, and in that the barrel has a projecting axial pin (101) for engagement with a complementary part (17) of the escutcheon plate (2) for preventing pivotal motion of the handle (4) in the locked position.