Improved Safety Lock.
Year: 1893

page_text: COMPLETE SPECIFICATION.
Improved Safety Lock.
I, JOHN SINGER, of 34, Kerepesi-ùt, in the City of Budapesth, in the
Kingdom of Hungary, Inventor, 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:—
This invention relates to an improved safety lock, destined to fully meet all the
requirements demanded of such a device.
In the accompanying two sheets of drawings three modifications of the lock
constructed according to this invention are shown in the various figures, Sheet I,
showing a lock for room doors and the like and Sheet II a lock for railway-
carriage doors and a pad lock. It will be evident, that this lock can by the
omission of certain parts etc. be employed as, cash, furniture, drawer, warehouse,
locks etc., but it is most advantageously adapted for railway carriage control locks.
In order to enable the invention to be clearly understood reference is made to
the accompanying drawings.
Fig. 1 (Sheet I of the drawings) is an elevation of the outer side of a door
and the lock plate fixed to such door.
Fig. 2 is an end or edge view of the door, with the side plate of the lock.
Fig. 3 is an elevation of the inner side of the door and inner lock plate.
Fig. 4 is the outer side view of the lock.
Fig. 5 is an elevation of the safety device consisting of control plates the
covering plate, shown in Fig. 4 being removed.
Fig. 6 is an elevation of the lock, the tumblers and bolt shown in Fig. 5 being
removed.
Fig. 64 is an elevation of the same lock in the open position and with the bolt.
Fig. 7 is an elevation of the control dial, the whole safety device being
removed.
Fig. 8 is an elevation corresponding to Fig. 7 the control dial being also
removed.
.
Fig. 9 is an elevation of the inner arrangement of the lock when the locking
bolt is in an open position, and
Fig. 10 when the bolt is closed.
Fig. 11 is a cross section on line x-x of Fig. 4.
Fig. 11 is a part of same on a larger scale, and
Fig. 12 a section on line y-y of Fig. 10.
The constructive arrangement and operation of the lock is substantially as
follows:-
A device in the lock case 6 which always indicates how often the lock has been
This
opened is arranged above the bolt a provided with Chubb-tumblers.
controlling device consists of a dial or disc c with consecutive numbers round
its edge.
Every time the lock is opened this dial plate turns or advances the distance
between two numbers, these numbers being visible through the glass in the slot or
hole d of the plate e (Fig. 1) so that it is always possible to ascertain how often the
lock has been opened. In order to effect this, the dial c engages with the bolt a by
means of pawlf which advances the ratchet wheel g the distance of one tooth in
the direction of the arrow (Figs. 9 & 10) every time the bolt a is opened. The
dial c is coupled with the ratchet wheel g, and is therefore correspondingly operated,
each movement or operation of the ratchet wheel corresponding with the distance
between the numbers on the dial. The dial c is rotatable upon the outer cover-
The counter
plate i by means of a counterplate h secured to the dial by screws.
נס..מ

page_text: h
plate engages by means of a pipe m provided with slot 1 (Figs. 8, 9, 11 & 11^)
with the hollow hub n of the ratchet wheel g rotatable on pivot o.
The engaging
of the dial c with ratchet wheel g is effected in such manner, that a key bit or
ward g is pushed out of the hollow hub n by a spiral spring and engages with the
slott of the counter plate h. The ward or key bit q is attached to an annular
disc u provided in the hollow hub n and is by means of a collar v of the key bit q
guided on the pivot o.
The periphery of the counter plate h forms a spiral, which is closed diametrically
opposite the commencing number (1) of the dial c by an S-like hook or catch
(Figs. 8 & 9). A pawl attached to the inner side of the plate i and operated by
the spring w (Fig. 8) bears against the periphery of the plate h, so that the dial
can only make one turn as the pawl z is caught by the outer end a¹ of the spiral.
Consequently by reason of the pawlf pressing against the teeth of the ratchet
wheel g the lock can only be opened, if the coupling of ratchet wheel g and dial c
be released, when the said dial can be turned back. Until the pawl engages with
the hook or catch of the inner end of the spiral on the periphery of the plate h,
the lock can be opened. The releasing of the coupling between the dial c and
ratchet wheel g and the turning back of the former is effected by means of a key
whose hollow shaft is pushed on to the pivot o and enters the hollow hub n of the
ratchet wheel g, whereby the collar and with it the key bit q in the hub n is
pushed back and the plate released, the key bit just being in the keyhole-formed
slott of the plate / so that on turning the key in the direction of the hands of a
clock, the plate h and dial e are moved.
A pawl c controlled by a spring centers the teeth of the wheel at every
operation of the same in such manner that the corresponding figure on the dial c is
shown through the slot d of the case plate e.
In order to prevent the dial c being operated by unauthorized persons, a safety
device is provided (shown in Figs. 4, 5, 6 & 64) consisting of a safety lock A
arranged over the dial and attached to the plate i of the case. The key bit g and
slot t of the device for operating the dial plate are in a horizontal position towards
the right hand when the dial c has reached its limit, while the key hole k is per-
pendicular to this position. The key bit q and slot t however are covered by the
bolts of the lock A secured by tumblers p, and furthermore the pino is equally
closed or covered by means of two links or slides x, x arranged under the bolts by
which they are actuated and closely bearing against the pin.
In consequence of this arrangement, the dial c is only accessible by the corre-
sponding key, which must be first inserted into the lock A and then turned three
quarters of a complete turn to the right, whereupon the insertion of same as
aforementioned for turning back the dial c is possible as the bolts (as shown
in Fig. 6) now stands with its opening over the collar or socket key bit q and slot t
and the opening of the slides having also been effected by the bolt.
The opening of the slides or links a, a rotatable on the pivot g¹ of the lock
plate e is effected by the bolt s guided on to the same pivot d by means of slots f¹
the under side of which bolt is provided with pivots g' engaging with the oblique
slots of the links x, x so that by being pushed towards the right, the links x, x
are pushed apart or opened.
For taking out the key, the same must of course be returned to its original
position, when the lock A is again locked. It can happen that the dial chas
reached its limit and the bolt a is just locked from within. Now as the device for
regulating the dial plate is not accessible from within, it would be impossible to
open same with the principal key alone. In this case a knob or button is
provided on the inner lock plate ; which on being pressed down releases the whole
operating device, and makes it possible to open the bolt a. The button j¹ is fixed
on the horizontal lever arm 1, pivotally secured to lock bottom plate by means
of the bolt k (see Figs. 9, 10 & 11) said lever entering by its tappet m
passing through the slot n' of the plate i¹, the interior of the lock just above the
pawl f

page_text: By pressing the knob j¹ down the tappet of the lever engages with the pawl f,
pressing same down, and releasing it from the ratchet wheel g whereby the bolt a
is freed.
A small red or otherwise bright colored plate p₁ connected to the bolt a by a
pin o' moves with the bolt a and when the lock is closed, appears in the glazed slot
or opening of the outer lock case e, so that it is always possible to ascertain
whether the lock is open or closed.
In the bottom part of the lock a separate space rl is provided, which is accessible
by means of the slot sl of the case e and a small door u' of the lock plate v which
can be locked by bolt t' (see Figs. 1, 4, 9 & 10). This space serves for the
reception of suitable control cards or tickets inserted through the slot s' and
indicating when and through whom the lock was opened last time. The small
door u of course is only accessible when the room door is open and the slot s' only
This
when the lock is open, as otherwise the slot is closed by the rotary slide w¹.
rotary slide w is the lower end of a two armed lever turning on the pivot a¹ and
On
engaging with its upper curved end y¹ with the vertical slot z' of the bolt a.
locking the bolt a the end w' is turned over the slot s and thereby locks same.
In the accompanying drawing the bolt a is adapted for a double turning lock, but
of course the same can be applied to a single or multiple turning lock. The same
applies both to the tumblers of the main bolt a and the safety device A.
It is evident that the nature of my invention is not departed from by altering
the form, or omitting or adding some parts as will be seen distinctly from the
construction shown on Sheet 2 of the drawings.
Figs. 13-19 show a controlling lock for a railway carriage, whose important
parts are similar to the lock already described. The door-latch with bolt, the
safety device A of the dial, the signal plate p' and the inner releasing device j¹¹ n²
are omitted. Moreover the bolt a is somewhat modified and only turns once.
Fig. 13 is a front view of this controlling lock for railway carriages.
Fig. 14 is a front view of this lock with the cover removed and in the open
position.
Fig. 15 shows the upper part of the closed lock with the controlling dial removed
so that the device for operating such dial can be seen.
Fig. 16 is a section on line x-y of Fig. 14.
Fig. 17 is a part of the cover when the keyhole plate
open.
Fig. 18 is a cross section on line a¹y of Fig. 15 through the closed controlling
lock.
Fig. 19 is a vertical section of the receptacle for the controlling cards.
The dial is rotatable by means of a counter plate h secured to same by three
screws a on the square plate fixed at the three points i, i, i in the frame b (Figs. 2
& 4) by means of corresponding lugs j, j, j, and operates in the same manner as the
lock shown in Sheet I of the drawing.
Furthermore this lock has a second controlling device for the purpose of
continually showing at which stations or places the lock or carriage was opened,
and thereby enabling the authorized person who opened the lock and before closing
same, to insert a card showing the name of the station, time, number, etc., into the
receptacle of the lock, destined to receive it. This receptacle when the lock closes
is pushed under the plate e, so that the side of the card showing the abovementioned
particulars can be seen through the glass of the slot or opeuing d' in the plate e.
When the lock is again opened the card must necessarily be destroyed or injured
by a small knife provided for. this purpose. When the door is opened by an
authorized person, the latter substitutes for the destroyed card a new one, which
is likewise provided with name, time, number etc., of the station at which the lock
is again to be opened. The injured card which is taken out is inserted through a
slot e of the plate e into a receptacle f¹ provided in the lower part of the lock as
shown in Sheet I, so that such cards are hereby collected. The card receptacle g¹
is arranged on a plate h¹ attached to the bolt a above the tumblers and moved by
such bolt when operated. The card receptacle g' is rotatable on a hinge

page_text: e
(Fig. 19) and when the lock is open, is directly under the opening of the plate
(Figs. 14, 16 & 17) so that by releasing the spring catch, the card receptacle is
opened, through the spring (Fig. 19) and allows the injured cards being taken
out or a new one being inserted. The device for closing the slot e¹ is also somewhat
modified in this modification, though the same arrangement can be employed as
shown in Sheet I of the drawings.
A slide n' is pivotally suspended on the plate h¹ by means of the links said
slide being in its lowest position when the lock is open (Fig. 14) but when being
closed is raised and guided on the turned up sheet plate o¹, and covers the slot e¹
(Figs. 16 & 17) so that the cards cannot be taken out from the receptacle.
Figs. 13, 16, 17 & 18 show the position of the small knife p' destined to destroy
or injure the cards. As seen in Figs. 13 & 16 the knife p' is situated at the under
side of the plate e just between the glazed opening d and hole or recess j¹.
It will be seen from the cross section (Fig. 18) that the cutting edge of the
knife p' is bent towards the opening d' covered with glass, so that the card of
corresponding thickness contained in the card receptacle g' is forced beneath the
knife p without being injured when the bolt a is closed.
On the opening of the bolt however, the knife catches the surface of the card
by its hook-like construction and tears off, or shaves, or peels a part from such
surface. The tickets collected in the receptacle can be removed at the terminal
station through the small door g' to be opened by a key. The keyhole for the
lock as well as the dial c are provided with protecting plates ¹, s (Fig. 17). As
to the further arrangement the operation of the several parts is the same as in the
lock previously described, the bolt a being additionally provided with the known
catchers or latches 2, 2.
The same is the case with the safety control pad-lock shown on Sheet II, of
which Fig. 20 is an elevation of the interior mechanism of the lock, Fig. 21 a side
elevation of the lock with the casing and Fig. 22 a cross section on line a-a of
Fig. 20. With this construction only the control dial c and the safety device A
are provided, all other parts being dispensed with.
Having now particularly described and ascertained the nature of this inven
tion and in what manner the same is to be performed I declare that what I
claim is
1. In a safety lock the arrangement of a dial (c) coupled with ratchet wheel (g)
substantially as described, said dial being rotated or advanced the distance of two
figures every time the lock is opened, by means of a pawl (f) secured to the locking
bolt (a) and engaging with the ratchet wheel (9) said figures on said dial indicating
through an opening (d) in the casing (e) how many times the lock has been opened,
substantially as described and shown in the drawings.
2. In a safety lock, the device of coupling of the dial attached to the counter-
plate (h) with the ratchet wheel (9) consisting of a keybit (g) projecting from the
hollow hub (n) controlled by a spring (") such key bit causing the release of the
said coupling, when being pushed into the hub (n) substantially as described and
shown.
3. In a safety lock the device for stopping the dial after each turn or advance
consisting of a pawl (2) caught by the inner end of the S-formed hook secured
to the periphery of the counter plate (/) after each rotation, the release of such
pawl being effected by the turning back of the dial by means of a key, which at
the same time releases the coupling device described in Claim 2, substantially as
described.
4. In a safety lock, the device for securing the dial (c) by means of a small lock
provided with tumblers and links or slides (a, a) as described having first to be
opened by a key as described in Claim 3 in order to render the said dial accessible,
substantially as described and shown.
5. In a safety lock the device for rendering inoperative the dial (c) or ratchet
wheel (g) by pressing down the pawl (f) by means of the tappet m' engaging

page_text: through the casing (1) of the lock and the lever (1) pivotally secured to such plate i¹
on the outer side said lever being actuated by a knob or button (¹) substantially
as described and shown.
6. In a safety lock, a bright colored disk (p¹) connected with the bolt (a)
which appears through the opening (d) of the plate (e) when the bolt is locked
thus enabling it to be always seen when the lock is closed, substantially as described
and shown in the drawings.
7. The combination with a safety lock of a control card or ticket receptacle (9')
arranged on the bolt (a) and being moved with same said receptacle receiving the
tickets bearing the time, number, and name of the station at which the lock was
opened, and which tickets when the lock is closed are seen through the opening (d)
of the cover (e) whereas when the lock is opened the receptacle (9) springs after
releasing a spring catch out of the opening in the cover (e) and thereby allows
the tickets to be changed substantially as described and shown.
8. The combination with a safety lock of a small knife (p¹) underneath the
cover (e) which injures the tickets as described when the lock is opened and
thereby indicates whether the lock has been opened, substantially as described and
shown in the drawings.
9. In a safety lock the arrangement of a space (r) for collecting the tickets,
whose slots in the cover (i) for inserting said tickets is closed by means of the
rotary slide (w) actuated directly from the bolt (a) or by means of suspended
slide (n) when the bolt is closed, substantially as described.
10. An improved safety lock substantially as described or some special parts of
such lock in combination with other locks of every description for every purpose
required, substantially as described and shown.
Dated this 10th dex of Jul 1893
J C. CHAPMAN, C.P.A.,
70, Chancery Lane, London, W.C., Filing Agent.