Year: 1887

page_text: Date of Application, 26th Jan., 1887
Complete Left, 22nd Oct., 1887
Complete Accepted, 22nd Nov., 1887
the nature of this invention to be as follows :—
My invention relates to door locks and consists partly in the arrangement of the
parts of the lock loosely in a suitable casing, in such a manner that they are retained
in place by the outer cover of the casing.
The invention also partly consists in the use of a single spring for maintaining the
spring bolt and the dormant bolt in proper position and in replacing certain parts of
known construction in locks by new arrangements.
This invention besides possessing great simplicity of construction presents the
advantage of greatly facilitating any repairs which may be required as no part of the
mechanism is fixed either to the casing or to the cover of the same, and can therefore,
after the cover is removed be easily taken out of the casing and repaired, or replaced
by a new part.
The improved lock is constructed in the following manner.
Upon a tubular spindle designed to receive the latch operating rod and firmly
connected with the casing is placed a knee lever adapted to turn upon the said
spindle and to bear against the lower side of a stop in which position the said lever
is retained by a flat spring inserted freely between a fixed pin and the lower side of
the lever.
The spring bolt is guided in the opposite side walls of the casing so that a recess in
the said bolt is above the lever arm through the medium of which the bolt is caused
to slide in its guides.
The dormant or lock bolt is supported in the lock case in a similar manner
to the spring bolt, being guided in suitable openings in the two side walls.
The tumblers are pivotted to a common pin fixed in the casing, and they have slots
forming a stop which bears against a projecting pin fixed on the lock bolt and limiting
the throw of the said lock bolt in both directions. The said projecting pin is guided
in a suitable slot in the cover of the casing.

page_text: The tumblers are provided with varying curves upon their lower sides so that the
bolt can only be displaced by the proper key.
The tumblers are pressed down upon the projecting pin by the lower end of a spring
which is mounted in a split stud and bears with its upper end against the spring
bolt.
The lock case is closed by a cover secured by screws or by other practical means
whereby the position of all the parts of the lock is maintained.
The lock can, after the removal of the cover, be completely pulled to pieces without
any necessity arising for unfastening a screw or rivet, so that, if the cover is fastened
by a single screw, it is sufficient to unscrew the same in order to separate the different
parts of the lock.
The device for actuating the sliding bolt is of special construction. This device is
not liable to be worn by turning of the door handles as in ordinary locks, so that the
movements of the same are always firm and secure.
For this purpose the latch operating rod is passed through the said tubular spindle
and is provided with a catch or driver which engages with a corresponding recess in
the nave of the said knee lever. This driver presses down the horizontal arm of the
said lever and with its vertical arm acts upon the bolt to move the same. When the
latch is released it snaps back again under the action of the spring whilst the said
lever is also carried back to its normal position by a spring.
A recess of suitable depth in the tubular spindle limits the oscillation of the lever in
the desired manner and the displacement of the spring bolt.
According to a modification of my invention the spring bolt is carried by a yoke
and actuated by a double lever, projections or collars on which turn in corresponding
apertures in the walls of the casing. The two ends of the said double lever press
against the rear sides of the yoke, the front side of which terminates in a catch which
forms the bolt and is guided in the front wall of the casing. The rear part of the
yoke is guided on each side by means of a small square projection entering a
corresponding slot in the casing.
Owing to this arrangement it is evident that the spring bolt is withdrawn, no
matter whether the operating rod is turned to the right or left.
The lock bolt is guided at the rear end by means of a square projection entering a
slot in the casing, whilst it is guided on the front side in the ordinary manner.
The
tumbler which holds the lock bolt in the desired position is on the one hand guided
behind the said lock bolt and on the other hand by means of a square projection
entering the casing. A second projection on the front side of the said tumbler
engages with a corresponding recess in the bolt and holds the latter in its proper
positions. The key acts in this case upon straight foot of the tumbler whereby the
latter is lifted so as to admit of the displacement of the lock bolt. A single spring
hent around a pin maintains the spring bolt as well as the dormant bolt in position,
one end of the said spring bearing against the spring bolt and the other end upon the
tumbler which locks the lock bolt.
When all the parts are inserted in the casing the whole is closed by means of a
cover which is fixed by a single screw after the projection of the tumbler has been
introduced into the corresponding guide slot.
Dated this 26th day of January 1887
HASELTINE, LAKE & Co.,
45, Southampton Buildings, London,
Agents for the Applicant.

page_text: I EDOUARD GIETAERT, of Liège in the Kingdom of Belgium, Mechanician 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 :-
My invention relates to door locks and consists partly in the arrangement of the
parts of the lock loosely in a suitable casing, in such a manner that they are retained
in place by the outer cover, of the casing: The invention also partly consists in the
use of a single spring for maintaining the spring bolt and the dormant bolt in
proper position and in replacing certain parts of known construction in locks by new
arrangements.
This invention besides possessing great simplicity of construction, presents the
advantage of greatly facilitating any repairs which may be required, as no part of
the mechanism is fixed either to the casing or to the cover of the same, and can
therefore, after the cover is removed be easily taken out of the casing and repaired,
or replaced by a new part.
In the accompanying drawing
Figure 1 is a front elevation of my improved lock with the cover removed,
Figure 2 is a central longitudinal section of the same.
Figure 3 is a transverse section on the line X Y Figure 1.
Figure 4 is a plan of the spring bolt.
Figure 5 is a sectional elevation and
Figure 6 a longitudinal central section showing a modification of my improved
lock.
Like letters of reference indicate corresponding parts in all the figures.
The improved lock is constructed in the following manner. Upon a tubular
spindle designed to receive the latch operating rod T, and which is firmly
connected with the casing, is placed a knee lever L adapted to turn upon the said
spindle S; the said knee lever bears against the lower side of a stop a in which
position the said lever is retained by a flat spring R₁ inserted freely between a fixed
pint and a projection on the lower arm of the lever L.
The spring bolt P which terminates at the rear in a cylindrical rod is arranged
above the upper arm of the lever Land is guided in the opposite side walls of the
casing which is provided with suitable holes for that purpose.
The said bolt is provided with a recess Figure 4 with which the upper arm of
the lever L engages and through the medium of which the said bolt is caused to slide
in its guides.
The dormant or lock bolt P' is supported in the lock case in a similar manner to
the spring bolt, being guided in suitable openings in the two side wal's.
The tumblers G are pivoted to a common pin fixed in the casing, and are

page_text: provided with slots which form a stop e which bears against a projecting pin b fixed
on the lock bolt P and which limits the throw of the said lock bolt in both directions.
The said projecting pin is guided in a suitable slot in the cover D of the
casing.
The tumblers G are provided with baring curves upon their lower sides so that the
bolt can only be displaced by the proper key.
The tumblers are pressed down upon the projecting pin by the lower end of a
spring R which is mounted at or near its middle in a split stud E and bears with its
upper end against the spring bolt P.
The lock case is closed by a cover D secured by screws or by any other means,
whereby the position of all the parts of the lock is maintained.
The lock can, after the removal of the cover, be completely pulled to pieces without
the necessity of unfastening a screw or rivet, so that, if the cover is fastened by a
single screw, it is sufficient to unscrew the same in order to separate the different
parts of the lock.
The device for actuating the spring bolt P is of special construction. This device
is not liable to be worn by the turning of the door handles as in ordinary locks, so
that the movements of the same are always firm and secure.
For this purpose the latch operating rod T is passed through the said tubular
spindle S and is provided with a catch or driver M Figure 3 which engages with a
corresponding recess in the nave of the said knee lever L Figures 1 and 3. This
driver presses down the horizontal arm of the said lever which with its vertical arm
When the latch is released it snaps back
acts upon the bolt P to move the same.
again under the action of the spring R whilst the said lever L is also carried back
to its normal position by the spring R.
A recess of suitable depth in the tubular spindle S limits the oscillation of the
lever L in the desired manner and the displacement of the spring bolt P.
According to the modification of my invention represented in Figures 5 and 6 the
spring bolt is carried by a yoke Cand actuated by a double lever with round
projections or collars which turn in corresponding apertures in the walls of the casing.
The two thumb ends of the said double lever press against the rear sides of the
yoke the front side of which terminates in a catch which forms the spring bolt P
and is guided in the front wall of the casing. The rear part of the yoke is guided
on each side by means of a small square projection centering a corresponding slot
in the casing.
Owing to this arrangement it is evident that the spring bolt is
withdrawn no matter whether the operating rod is turned to the right or left.
The lock bolt P¹ is guided at the rear end by means of a square projection c²
entering a slot in casing, whilst it is guided on the front side in the ordinary manner.
The tumbler G which holds the lock bolt in the desired position is on the one hand
guided behind the said lock bolt. P and on the other hand by means of a square
projection entering the casing. A second projections on the front side of the
said tumbler engages with a corresponding recess in the bolt and holds the latter in
its proper position. The key acts in this case upon the straight foot p' of the
tumbler whereby the latter is lifted so as to admit of the displacement of the lock
bolt.
A single spring R bent around a pin E' maintains the spring bolt as well as the
dormant bolt in position one end of the said spring bearing against the spring bolt P
and the other end upon the tumbler G¹ which locks the lock bolt.
When all the parts are inserted in the casing the whole is closed by means of a
cover D which is fixed by a single screw into the pin E after the projection c of the
tumbler has been introduced into the corresponding guide slot.
Having now particularly described and ascertained the nature of my said
invention, and in what manner the same is to be performed I declare that what
claim is
First. The arrangement in a loose or free state of all the parts of the lock in the
uch "manner that they are not in any way firmly fixed either on

page_text: the casing or on the cover, so that for taking the lock to pieces it is sufficient to
remove the cover, the further withdrawal of screws or rivets being unnecessary.
Second. For closing the spring bolt P and the dormant bolt P the employment of
a single common spring R which is placed in the slit of a pin E near the middle or
bent around the latter as above specified.
Third. Guiding the bolts P and P1 or the tumblers G² by means of square or
rectangular projections which fit into corresponding openings in the casing
and of the cover, as above specified.
Fourth. In a lock the means substantially as hereinbefore described for actuating
the spring bolt P which consists in guiding or turning the latch rod T in the long
hollow spindle $ fixed on the casing and passing through the cover D of the said
casing as above specified.
Fifth. The combination of the catch or driver M secured to the latch rod with the
lever L capable of turning upon the spindle S and displacing the bolt P as and for
the purpose specified.
Sixth. The combination of the double lever C capable of turning in the bottom of
the casing and the cover with the yoke e' carrying the bolt P. substantially as above
specified.
HASELTINE, LAKE & Co.,
45, Southampton Buildings, London,
Agents for the Applicant.