Improvements in or relating to Electrical Locks.
Year: 1888

page_text: Date of Application, 21st Nov., 1888
Complete Specification Left, 2nd Aug, 1889-Accepted, 14th Sept., 1889
Improvements in or relating to Electrical Locks.
A communication from abroad by PAUL SCHWENKE, of Zerbst, in the Duchy of
Anhalt, Empire of Germany, Watchmaker.
I, GEORGE CECIL DYMOND, M. Inst. M.E. of the Agency for Foreign Patent
Solicitors, 6, Lord Street, Liverpool and 6, Bank Street, Manchester, both in the
County of Lancaster, and 323 High Holborn in the County of Middlesex Engineer
do hereby declare the nature of this invention to be as follows:-
:—
The invention has for its object a lock for doors and drawers which can be released
from a distance by electricity.
Electrical contact can be established at a fixed time by means of a clock or by
pressure upon a button or push.
On the accompanying drawings,
Figure 1 represents the lock closed..
Figure 2 represents the lock opened.
Figure 3 is the application of the lock to a door in communication with a clock.
If the door is closed the bolt A is held in its position by the armature E, the end
of which forms a projection engaging a notch in the bar A.
The armature E turns on its axis e. As soon as the circuit is closed, the armature E
is attracted by the electro-maguet F, it turns on its axis e and the bolt A thus
loosened falls back on its axis B, and is arrested below by a catch D (Figure 2).
The door may then be opened.
Figure 3 shows the application of the lock to a door (for example to a safe or
strong room) in combination with a clock by which contact is established every day
at a fixed hour, so that the door can be opened at that hour, but at no other time,
except at the desire of the person in charge.
O is a button placed in the private room of the chief or person in charge, permitting
him to open the door when required.
Figure 4 is the side-view of the lock-case shewn in figures 1 and 2.
Figures 5 to 7 inclusive show the same arrangement but with this difference, that here
the lock-case is fixed to the side-post and the bolt on the door. Figure 5 is a front
view of the apparatus, and figure 6 a section through the lock case. Figure 7 shows
the door open and closed.
Figures 8 and 9 show the apparatus applied to an ordinary lock of a door.
The rectangular projection of the lever E turning on its axis e¹, engages the slot
of the bolt A. The said lever or armature E presses upon E' owing to one end being
heavier than the other, see Figure 8.
As soon as contact is established, the upper part of E¹ is attracted by the magnet F,
the lever E being thus freed falls over on the right by its own weight and the lock
may be opened (see Figure 9).
A second magnet F¹ serves for securing the lock. When the electric current flows
round the coils of the electro-magnet F₁, the lever E' is attracted and lifted (as soon
as the bolt is moved forward), and its rectangular projection engages the slot of A,
and the bolt is secured and cannot be moved back. As before mentioned the button for
opening the lock is placed in the room of the chief or the proprietor.
A controlling apparatus (Figures 10 to 12) indicates if the lock is opened or closed.
By pressing one or other of the pushes C and C¹ for closing and opening the
lock, the current passes through the magnets and f¹ (Figure 10). A little
lever pivoted at p is attracted either by for f¹. On the pivot p a toothed whee!
is fixed, which engages the teeth of the little pinion », on the axis of which the
pointers is placed (Figures 11 and 12). If one of the pushes is pressed and electrical
7

page_text: contact for opening or closing the lock is established through one of the magnets F
and F (Figure 9), the lever is also attracted by f or f¹, and moves the pointer s
which indicates upon the dia! either the word "opened'
"
or "closed."
It is clear that instead of electricity, one may employ also pneumatic pressure for
opening the lock. The lock is also provided with a key-hole (Figures 1, 2 and 4)
for drawing back the bolt by hand.
Dated this 20th day of November 1888
COMPLETE SPECIFICATION
Improvements in or relating to Electrical Locks.
A communication from abroad by PAUL SCHWENKE, of Zerbst, in the Duchy of
Anhalt, Empire of Germany, Watchmaker.
I, GEORGE CECIL DYMOND, M. Inst. M.E. of the Agency for Foreign Patent
Solicitors, 6 Lord Street, Liverpool and 6 Bank Street Manchester both in the
County of Lancaster, and 23 High Holborn in the County of Middlesex Engineer,
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 invention has for its object a lock for doors and drawers which can be released
from a distance by electricity.
Electrical contact can be established at a fixed time by means of a clock or by
pressure upon a button or push.
:-
On the drawings accompanying the provisional specification :-
Figure 1 represents the lock closed.
Figure 2 represents the lock opened.
Figure 3 is the application of a lock to a door in communication with a clock.
If the door is closed the bolt A is held in its position by the armature E, the
end of which forms a projection engaging a notch in the bar A.
The armature E turns on its axis e. As soon as the circuit is closed, the
armature E is attracted by the electro-magnet F, it turns on its axis e and the bolt A
thus loosened falls back on its axis B, and is arrested below by a catch D (Figure 2).
The door may then be opened.
Figure 3 shows the application of the lock to a door (for example to a safe or
strong room) in combination with a clock by which contact is established every day
at a fixed hour, so that the door can be opened at that hour, but at no other time,
except at the desire of the person in charge.
C is a button placed in the private room of the chief or person in charge,
permitting him to open the door when required.
Figure 4 is the side view of the lock case shown in Figures 1 and 2.
Figures 5 to 7 inclusive show the same arrangement, but with this difference, that
here the lock case is fixed to the side post and the bolt on the door. Figure 5 is a
front view of the apparatus, and Figure 6 a section through the lock case. Figure 7
shows the door open and closed.
Figures 8 and 9 shows the apparatus applied to an ordinary lock of a door.
The rectangular projection of the lever E turning on its axis el, engages the slot
of the bolt A. The said lever or armature E presses upon E¹ owing to one end being
heavier than the other, see Figure 8.
As soon as contact is established, the upper part of E' is attracted by the magnet F,
the lever E being thus freed falls over on the right by its own weight and the lock
may be opened (see Figure 9).
A second magnet Fl serves for securing the lock. When the electric current flows
round the coils of the electro-magnet F¹, the lever E' is attracted and lifted (as soon
as the bolt is moved forward) and its rectangular projection engages the slot of A, and

page_text: the bolt is secured and cannot be moved back. As before mentioned, the button for
opening the lock is placed in the room of the chief or the proprietor.
A controlling apparatus (Figures 10 to 12) indicates if the lock is opened or closed.
By pressing one or other of the pushes C and C¹ for closing and opening the lock,
the current passes through the magnets and f¹ (Figure 10). A little lever / pivoted
at p is attracted either by for f¹. On the pivot pa toothed wheel 9 is fixed, which
engages the teeth of the little pinion r, on the axis of which the pointer s is placed
(Figures 11 and 12). If one of the pushes is pressed and the electrical contact for
opening or closing the lock is established through one of the magnets F and F¹
(Figure 9), the lever is also attracted by for, and moves the pointer s which
indicates upon the dial either the word "opened" or closed."
66
Having now particularly described and ascertained the nature of the said inven-
tion and in what manner the same is to be performed, as communicated to me
by my foreign correspondent, I declare that what I claim is :-
1. A lock for doors, drawers or the like, having a pivoted detent E normall
holding fast a bolt A, but capable of being lifted by attraction of the magnet F,
thereby allowing the bolt A to fall down by gravity or otherwise in such manner that
the door may be opened, substantially as described and shown in the drawings.
2. The arrangement of two magnets F and F' and two levers or armatures E E¹
for controlling the opening and closing of the door as herein described and shown by
Figures 8 and 9 of the drawings.
3. In a lock such as described, the controlling apparatus composed of the magnets f
and f, the lever 7 pivoted on its spindle p in combination with the gear wheels
and and the pointer s, substantially as herein described and shown in Figures 10 to 12
of the drawings.
Dated th: 00
T
1000
WM. P. THOMPSON & Co.,
Agents for the Applicant.