Locks – Special application – For control and machine elements
Patent
1998-07-28
2000-05-30
Boucher, Darnell M.
Locks
Special application
For control and machine elements
70150, 70467, 70484, 292173, E05B 1720, E05B 5504
Patent
active
060678232
DESCRIPTION:
BRIEF SUMMARY
The present invention relates to an arrangement for a locking mechanism comprising a lock bolt spring-assisted in the intended direction of locking, which is contained inside a lock casing connected to a plate capable of attachment along the side of a door, and with an actuating arm projecting laterally from said lock bolt and capable of actuation by means of a handle connection extending through a door of the intended kind and a handle projecting on either side of the door, and with a pivoting follower acting between said handle and actuating arm for the purpose of actuating the actuating arm and the lock bolt, in conjunction with which a lock component capable of being caused to move in a linear direction is arranged in such a way as to be capable of displacement by means of a pivotally mounted lock component carrier, which is attached to a lock cylinder connected to any side/sides of the lock and the door in question and capable of being turned by means of a key, so as to be moved between a locking position in which the actuating arm is locked and an opening position in which the actuating arm is released, and in that the lock component is capable of interacting with a stop on the actuating arm in the locking position, in conjunction with which a spring-assisted stop component is capable of interacting with the lock component for the purpose of retaining it in the withdrawn opening position, enabling the bolt to be displaced, and in the extended locking position for the purpose of retaining the bolt in the locking position through interaction with the lock component.
A lock which is designed for installation on the outside of an intended door leaf has been in constant use for some time in so-called farm buildings such as cow sheds and stores, etc., where there was the need for a durable lock with high functional reliability. The advantages of such locks are many. In particular they are easy to install, and they require no major intervention in the existing door. Unlike locks which are recessed into the door leaf, any moist air is able to escape easily by ventilation, and these locks are thus less prone to freezing solid. Finally, thanks to the aforementioned features, these locks require very little maintenance; this maintenance is also easy to perform thanks to the ready accessibility of the lock components.
SE-C-140 664 shows a lock mechanism in accordance with the preamble to the claims. This arrangement is well proven in service and has been available on the market for more than 40 years. The situation encountered within society today is different, however, from that at the time when this lock was invented. In line with increased criminality, the need has also arisen for more thief-proof locks in farm buildings, too. The arrangement described in SE-C-140 664 also suffers from the disadvantage that it is perhaps believed, since the key of the lock functions both as a key and as an external door handle, that they key must be left in the lock at all times and that someone could happen to pull it out and, in the worst case, fall backwards and injure him/her self.
The principal object of the present invention is thus to overcome the disadvantages outlined above by simple but effective means.
A further object of the present invention is to make available a lock which, like the lock in accordance with SE-C-140 664, utilizes the handle, i.e. the door handle, to withdraw the lock bolt, instead of causing this transfer of force to take place via the key of the lock. In this way the risk is reduced of the key breaking off in the lock because of excessive torsional strain, for example if the lock bolt has unexpectedly frozen solid.
A lock arrangement previously disclosed in, amongst others, U.S. Pat. No. 1,554,839 is of a similar kind to that in accordance with the preamble to the present invention. No means are provided, however, to prevent a follower from sliding off a hook part in the actuating arm, either to the side, if the contact surfaces of the components attempt to slide out of engagement with one anot
REFERENCES:
patent: 1062176 (1913-05-01), Mason
patent: 1554839 (1925-09-01), Brown
patent: 1721162 (1929-07-01), Moore
patent: 1855089 (1932-04-01), Boothe
patent: 2240524 (1941-05-01), Smith
patent: 5469723 (1995-11-01), Litwin et al.
LandOfFree
Lock mechanism device does not yet have a rating. At this time, there are no reviews or comments for this patent.
If you have personal experience with Lock mechanism device, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Lock mechanism device will most certainly appreciate the feedback.
Profile ID: LFUS-PAI-O-1902291