Improvements in Locks.
Year: 1890

page_text: Date of Application, 25th Aug., 1890-Accepted, 11th Oct., 1890
Improvements in Locks.
A communication from JULIUS KRIEGER, HERMANN SCHOEN, and ALBERT DALLMER,
all of Dresden, in the Empire of Germany, Manufacturers.
I, ALFRED JULIUS BOULT of 323 High Holborn in the County of Middlesex, M.I.M.E.,
do hereby declare the nature of this invention and in what manner the same is to he
performed, to be particularly described and ascertained in and by the following
statement :-
This invention consists in a lock in which, the place of the ordinary locking bolt is.
supplied by one of an improved construction enabling a door for example to be
locked by simply raising the handle while a key is necessary to open the lock from
the outside.
In the accompanying drawings
Fig. 1 is a sectional elevation of a mortise lock constructed in accordance with
this invention.
Fig. 2 is a cross section on the crooked line I-II Fig. 1.
Fig. 3 represents a deeper lock known as a "rim lock" also improved in
accordance with this invention.
Fig. 4 is a section on the crooked line III-IV Fig. 3, and
Fig. 5 is a key adapted to open such "rim lock."
The lock shown in Figs. 1 and 2 is locked by means of the bolt A movably con-
nected to the bridge or guide a, the flanges a¹ of which limit its play. A¹ is a spring
baving a tendency constantly to force the bolt outwardly. a³ is a notch formed in
the web of the bolt A enabling the latter, when the door is thrown to, freely to move
inwards, without coming in contact with the projection 6 which would prevent it from
properly locking.
A stop at prevents any backward displacement of the block after it has been locked
in position..
The locking bolt A is operated by means of the sleeve or boss of the handle which
when depressed causes the projection 6 carried on such sleeve to come in contact
with the arm a². Both the springs B1 and B2 which in the position of rest, bear
against the fixed lug B³, actuate the arm 6' forming part of the handle sleeve, in
such a manner that by depressing the handle tension is applied to the lower spring B²
while when the handle is raised the upper spring B₁ is compressed.
C is the locking lever turning on the pivot c and capable if required of turning
with it in case the pivot or the lever C at said pivot is to be operated by means of a
suitable key or instrument. A spring is so arranged as to have the tendency to
retain the locking lever-in the position shown in the drawing. The lever ..C is
provided with a stop c¹ which when the handle is raised takes up its position over the
catch 6 at the end of the arm of the handle sleeve. The locking lever may be
released from its engagement with the said catch 62 either from outside only or as has
...been assumed in the drawing both from within and without by means of a suitable
key
; and any suitable catch device for further securing in position may be
employed.
The operation of this form of lock is as follows;-
When the different parts occupy the positions shown in the drawings the lock may
be opened by simply depressing the handle whereby the projection 6 is caused to
turn the stop a² to the right and in so doing draws backwards the bolt A. But
when the handle is raised the stop c¹ on the locking lever C passes over and engages
with the catch under the action of the spring C. The handle sleeve with its
attachments then takes up the position indicated in dotted lines in Figure ¨1, while

page_text: the stop b meets the stop at and prevents the bolt A from being moved backwardly
from without, say by means of a sharp instrument or tool. The lock, when in this
position can only be opened by means of a suitable key, which will release the locking
lever C while the spring B' will at the same time cause the handle sleeve or socket
and handle itself to resume their normal positions. But as before stated the locking
lever C may if preferred be released by turning its pivot with a suitable key or tool;
in which case no key would be required to open the lock from within.
"rim "lock
The form of lock represented in Figures 3 to 5 is what is termed a
and is provided with a rising and falling bolt. This lock only differs from that
described above in the external shape of certain parts, while the construction and
operation of both arrangements are substantially the same.
A is the pivoted bolt submitted to the action of the spring A¹. The socket or
sleeve B with its stop or catch 62 directly acts upon the bolt A and also is operated
on by the two springs B₁ B². The locking of the bolt is here effected as in the
arrangement described above by means of its projection at coming into contact with
the end 6 of the arm of the handle-socket or sleeve B. The locking lever C and its
spring C also act here in the same way as in the first mentioned construction,
except that the said lever can be released by the pin C projecting through a corre-
sponding slot in the wall or casing of the lock and which may be provided with a
knob or adapted so that it can only be operated by means of a key.
The distinctive feature of the modification shown in Figs. 3 and 4 is a ward
arrangement which it now remains more fully to describe.
.
D is a ward or block provided with an opening d¹ and capable of turning round
the key pin d¹.
This ward or block is at all times pressed against the wall of the lock by means of
a spring d² so that the pin d³ enters an opening provided in such wall and locks the
ward or block in position.
To prevent the ward D from being turned, and thereby the lock opened, by means
of a sharp or pointed instrument, the said ward D is provided at its upper surface
with a reduced portion or pin whereon a steel plate or disc d may be loosely set so
as to be able to turn independently of the ward.
The key (Fig. 5) is hollow and carries at its bit a projecting pin e fitting into
the orifice d of the ward or block D. The operation of this arrangement is as
follows:-
The key is passed on to the pin d in such a manner that its own pin e enters the
opening d provided for the purpose in the ward or block D. By applying slight
pressure to the key the pin d³ of the ward D is forced out of its seat or bearing in
the wall of the lock case and by means of the key turning upon the key-pin d¹ the
lock-lever is raised and releases the socket or sleeve of the handle.
Having now particularly described and ascertained the nature of the said inven-
tion as communicated to me by my foreign correspondent, and in what manner the
same is to be performed, I declare that what I claim is :-
1. In a lock capable of being closed without the use of a key by raising the handle
of the door or the like a stop or catch such as c¹ provided on a locking lever such
as C and adapted to lock the sleeve or socket B in place which latter in its turn secures
the bolt A in its locked position substantially as described and illustrated in the
accompanying drawings.
2. In a lock as characterized in the preceding claim, the arrangement of a ward
or block such as D adapted to release the locking lever C such ward or block being
movable from without by means of a key while a locking-plate or disc d prevents it
from being turned when not required to do so substantially as described and illustrated
in the accompanying drawings.
3. The combination and arrangement of parts constituting the complete lock
substantially as described and illustrated in Figures 1 and 2 of the accompanying
drawings

page_text: 4. The combination and arrangement of parts constituting the complete lock
substantially as described and illustrated in Figures 3 and 4 of the accompanying
drawings.
W. P. THOMPSON & BOULT,
Agents for the Applicant.