Improvements in Locks.
Year: 1894

page_text: Date of Application, 6th Mar., 1894
Complete Specification Left, 6th Dec., 1894-Accepted, 12th Jan., 1895
PROVISIONAL SPECIFICATION.
Improvements in Locks.
We, JOSEPH KAYE, of the Firm of Joseph Kaye & Sons, Limited, South
Accommodation Road, Leeds, in the County of York, Lock Manufacturer, and
THOMAS EMMOTT: of the same place, Works Manager, do hereby. declare the
nature of this invention to be as follows: -
The object of this invention is to prevent locks which have two, three, or more
shoots being unchecked or becoming inoperative.
We accomplish our object by constructing the levers of the lock in such a way
that they will prevent the bolts being thrown more than the proper distance by
any key.
Dated this 5th day of Morah 1001
JOHN WAUgh;
Agent.
Improvements in Locks.
.
We; JOSEPH KAYE, of the Firm of Joseph Kaye & Sons, Limited, South
Accommodation Road, Leeds, in the County of York, Lock Manufacturer, and
THOMAS EMMOTT of the same place, Works Manager, do hereby declare the
nature of this invention and in what manner the same is to be performed, to
be particularly described and ascertained in and by the following statement :—
The object of this invention is to prevent locks which have two, three, or more
shoots, being unchecked, or becoming inoperative by being thrown or withdrawn
further than the intended distance by one turn of any key.
In describing our object, reference is made to the accompanying sheet of drawings
in which
Fig. 1 represents a view of the interior of a lock having more than one shoot and
constructed in the ordinary manner, and with the lock bolt projecting the proper
distance when operated by the throw of the first key.
Fig. 2 is a similar view showing the lock bolt projected or thrown beyond the
proper distance by the first key.
Fig. 3 is a view of a similar lock provided with our checking lever, the lock
bolt being projected the distance equal to one throw and turn of the key and there
held by our checking lever, and
Fig. 4 a similar view with the lock bolt shot the full distance. In all the
figures similar letters indicate similar parts where they appear.
The lock bolt A. is mounted in the frame B. and provided with levers C.
having range holes D. through same of the usual description in locks arranged for
the bolt A. to be operated by more than one key.
As is well known by users of locks of this class, when the lock becomes a
little worn and the lock bolt free in action, by turning the key quickly, the
lock bolt A. may be thrown further than the intended distance, as for example
say on locking the door, in which case the stud E. passes the recess F. in range
hole D. a distance somewhat as shown by Fig. 2, instead of the stud engaging

page_text: with the said recess, thus leaving the lock bolt A. in such position that the
holder of the key may uncheck and open the door, and thus render check locking
by the master or other superior key useless, as the levers C. are in such position
that the superior keys will not pass, and give the impression that it is check
locked.
In some cases by turning the key quickly, the lock bolt A. is thrown too
far, putting the bolt A. into such position that neither the ordinary or superior key
will operate the lock.
In order to overcome these difficulties and prevent the bolt being moved more
than the proper distance intended by the key, we mount an additional lever G.
on pin H. the lever G. is raised each time the lock bolt A. is operated, and is
provided with a spring S. and with catch pieces K. and K' cut in the range
hole D. the catch pieces K. and K' being so arranged that when the bolt A.
is moving in the direction of arrow, the stud E. comes in contact with catch
piece K. preventing the bolt travelling further than the distance intended by the
turning of the key, leaving the bolt in such position that it may be check locked
by the superior key, on the insertion and turning of which, the bolt A. is projected a
further distance as shown by Fig. 4.
Should the levers C. of the lock be arranged for grand master or super grand
master keys, the lever G. is provided with a corresponding number of catch pieces K.
and K' in every case the lever G. is forced into the position by the spring S. or
otherwise, that the stud E. cannot travel further than the distance intended for one
turning of the key used for operating the lock bolt, thus preventing the lock bolt
being thrown further in either direction than the intended distance by any key.
Having now particularly described and ascertained the nature of this inven-
tion and in what manner the same is to be performed, we declare that what we
claim is,
Locks in which the lock bolt A. is moved certain distances by different keys
combined with a lever G. having two or more catch pieces such as K. and K
arranged substantially in the manner and for the purpose as hereinbefore
set forth.
Dated this 5th day of December 1894.
JOHN WAUGH,
Agent.