Improvements in or relating to Door and similar Locks.
Year: 1897

page_text: Improvements in or relating to Door and similar Locks.
I, STEPHAN CZEILER, Junior, Cabinet-maker, of Arad, in the Empire of Hun-
gary, do hereby declare the nature of this invention to be as follows:-
This invention has for its object an improved lock, the bolt of which, operated
by turning the handle knob serves at the same time for locking the door or the
like by being caused, by means of keys, to enter the keeper.. This lock can be
fitted to either right or left hand doors.
The mechanism is contained in a casing in which a lever or cam is provided
having a square aperture for receiving the handle spindle and carrying two pins
at its opposite ends one pin being normally raised by a spring arranged round the
handle spindle and resting with its other end against a pin secured to the lock
casing whereby the handle is returned to its normal position when it is released.
The movement of the handle beyond this normal position is prevented by the
hinge joint of two levers which are acted upon by the second pin coming in
contact with the casing of the lock. This pin further serves to cause the bolt
to return within the casing when the knob is turned, said pin causing the lever
to turn about its pivot secured to the casing, whereby the second lever connected
to it by a pin or hinge-joint is caused to move backwards. This movement of.
the lever owing to its engagement with a tooth or stop on the bolt withdraws the
bolt into the casing. As soon as the handle is released, the bolt is returned into
its normal position by the head of a spring secured to a projection or pin on the
casing. This normal position of the bolt is secured by a tumbler mounted on a
pivot pin the bolt, being pressed against a projection of the casing by the head
of the spring referred to acting on the end of said tumbler. The projection also
serves for guiding the bolt by engaging with a groove therein.
When the bolt is in this first normal position it can be withdrawn into the
casing by the handle as well as by the key and the door thus opened. When
the key is turned it engages with a tooth of the bolt and pushes the latter back
into the casing. If however the key is turned in the opposite direction, then the
key raises the tumbler against the head of the spring till its tooth is raised above
the projection and the bolt thrown forward by the spring. Then the bolt is
in its second locked position in which the face of the tumbler is pressed against
the projection by the head of the spring. In this position of the bolt the door
is locked, and it can be opened only by means of the key; this position is secured
by the tumbler being in a higher position and holding the lever engaging with
it also in a higher position than before, so that if the knob were now turned

page_text: said lever instead of moving backwards would only be pressed against the fixed
projection against which the spring of the handle lever presses. If it is desired
to open the door the key must be turned whereupon the tumbler will be raised
till its tooth is raised above the projection with which it was engaged. If the
key is turned still further it will press the bolt back against the spring head till
the tooth of the tumbler falls behind the projection under the influence of the
pressure of the spring-head at which moment the tooth is released, and the spring
head holds the bolt in its first normal position. If the key is further turned the
key will fulfil the function of the handle, and the bolt will be completely with-
drawn.
The bolt can be fitted both to right and left hand doors, by making the bolt
symmetrical on either side of its axis if the bolt is turned round together with
the front plate, then the locking face of the bolt if it was before on the left-hand
side, will now be on the right hand side, and if it was used for a right hand
door it can now be used for a left hand one.
When reversing the bolt the tumbler must be removed from the bolt and
turned also, in order that the bolt may retain its original position. The function
of the teeth is interchanged, the original upper teeth fulfilling the function of
the original lower teeth and vice versa.
BOULT & WADE,
Agents for the Applicant.
COMPLETE SPECIFICATION.
Improvements in or relating to Door and similar Locks.
I, STEPHEN CZEILER, Cabinet-maker, of Arad, in the Empire of Hungary, 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 follow-
ing statement:-
This invention has for its object an improved lock, the bolt of which, operated
by turning the handle serves at the same time for locking the door or the like
by being caused, by means of a key, to enter the keeper. This lock can be fitted
to either right or left handed doors.
Figs. 1 and 2 are side and front elevations of a lock according to the present
invention fitted to a right hand door the full lines show the normal position of
the bolt e and the dotted lines the locking position.
Figs. 3 and 4 are side and front elevations of the lock fitted to a left hand
door, full lines showing the bolt e in its locked and dotted lines in its open
position.
Figs. 5, 6 and 7 are detail views.
The mechanism is contained in a casing in which a lever or cam a a¹ is provided
having a square aperture a² for receiving the handle spindle 3 and carrying two
pins aas at its opposite ends, one pin a being normally raised by a spring a
arranged round the handle spindle and resting with its other end against a
pin secured to the lock-casing A, whereby the handle is returned to its normal
position when it is released. The movement of the handle beyond this normal
position is prevented by the hinge joint b¹, of two levers be which are acted upon
by the second pin a³, coming in contact with the casing of the lock. This pin as

page_text: further serves to cause the bolt e to return within the casing when the knob is
turned, said pin a causing the lever b to turn about its pivot s secured to the
casing, whereby the second lever c connected to it by a pin or hinge-joint 6¹ is
caused to move backwards. This movement of the lever C owing to its engage-
ment with a tooth e¹ or stop on the bolt e shown in Fig. 5 in side-elevation, with-
draws the bolt into the casing. As soon as the handle is released, the bolt e is
returned into its normal position, shown in Fig. 1 full lines, by the head of the
spring n secured to a projection or pin on the casing. This normal position of
the bolt e is secured by a tumbler & mounted on a pivot pin on the bolt (Fig. 6)
being pressed against a projection of the casing by the head of the spring n
referred to, acting on the end of said tumbler. The projection also serves
for guiding the bolt e by engaging with a groove e therein.
When the bolt is in this first normal position, it can be withdrawn into the
casing by the handle as well as by the key and the door thus opened. The key
is turned in the direction indicated by the arrow I. When the key is turned
it engages with a tooth of the bolt e and pushes the latter back into the casing.
If however the key is turned in the opposite direction, then the key raises the
tumbler d and lever e against the head of the spring till its tooth d¹ is raised
above the projection p and the bolt e is thrown forward by the spring 12. Then
the bolt is in its second locked position (Fig. 1 dotted) in which the rear face ď²
of the tumbler d is pressed against the projection p by the head 12 of the spring.
In this position of the bolt the door is locked, and it can be opened only by
means of the key; this position is secured by the tumbler being in a higher position
and holding the lever c engaging with it also in a higher position than before,
so that if the knob were now turned said lever instead of moving backwards would
only be pressed against the fixed projection k. If it is desired to open the door,
the key must be turned in the direction indicated by the arrow I whereupon the
tumbler will be raised till its tooth is raised above the projection 2. If the
key is turned still further it will press the bolt e by acting on the tooth back
against the spring-head 2 until the tooth di of the tumbler d falls behind the
projection under the influence of the pressure of the spring-head at which
moment the tooth e³ is released and the spring head 72 holds the bolt e in its first
normal position by means of the tooth and projection p. If the key is further
turned in the direction indicated by the arrow I the key will fulfil the function
of the handle, and the bolt will be completely withdrawn (Fig. 3 dotted lines).
The lock can be fitted both to right and to left hand doors, by making the
bolt e symmetrical on either side of its axis XX; if the bolt e is turned round
together with the front plate B, then the locking face e of the bolt e, if it was
before on the left hand side, will now be on the right hand side, and if it was
used for a right hand door, it can now be used for a left hand one.
When reversing the bolt e the tumbler d must be removed from the bolt e and
turned, also, in order that the bolt may retain its original position. The function
of the teeth elece is interchanged, the teeth e¹e fulfilling the function of the
teeth and vice versa.
Having now particularly described and ascertained the nature of the said
invention and in what manner the same is to be performed, I declare that what
I claim is :-
:-
1. Universal lock characterised by a door or similar lock comprising a
reversible bolt e with symmetrically arranged teeth or projections as ele³e and
a pin the bolt being capable of being withdrawn from its normal position by
turning the handle thereby operating a lever a al and be as well as by means of
a key, the bolt returning into its normal position under the influence of the
pressure of a spring when the handle is released, its locked position being attained
only by means of the key acting on a tumbler d mounted on the pine, pro-
jection and spring n the handle being fixed in the locked position of the bolt,

page_text: owing to the arm c being raised by the tumbler d and held, substantially as and
for the purpose described.
2. The combination and arrangement of parts constituting the complete door
or similar lock substantially as described or illustrated in the accompanying
drawings.
BOULT & WADE,
Agents for the Applicant.