Year: 1897

page_text: •
Date of Application, 13th Apr., 1897
Complete Specification Left, 12th Feb., 1898-Accepted, 12th Mar., 1898
I, EGIDIUS JULIUS MARY SCHEEREN, of 1300, Colfax Avenue, in the City of
Denver, State of Colorado, United States of America, Gentleman, do hereby declare
the nature of this invention to be as follows:-
My invention relates to improvements in electro magnetic appliances for locking
doors, whereby the movement of the spring held bolt by the knob or other actuating
device is prevented, by pressing a push button. The invention may be applied
to any ordinary door locking mechanism, and will be described in connection with
a lock having a spring lield bolt, normally adapted to be withdrawn by pressing
either of two thumb levers which engage and actuate a bell crank lever, suitably
fulcrumed. The thumb levers are fulcrumed in the door just below the lock
casing, which is provided with an opening to allow the thumb levers to act on the
bell crank lever. The thumb levers are provided with guard flanges to prevent
the insertion of anything from the outside that might interfere with the working
of the said thumb levers. One arm of the bell crank lever engages a stop attached
to the inner extremity of the spring held bolt. If the bell crank lever is actuated
or turned on its fulcrum, the stop engaging arm thereof will withdraw the bolt
from the locking position. To enable me to prevent this withdrawal of the bolt,
I employ an arm pivoted on a post attached to the lock casing. To the extremities
of the pivoted arm are, movably attached two yokes. The outer extremities of these
yokes project beyond the lock casing and carry pole-pieces composed of soft iron,
or other magnetic material located in suitable proximity to two electro magnets.
These magnets are electrically connected with or placed in the circuits respectively
of a battery of other suitable source of electricity. These circuits are normally
open, but may be closed by pressing the respective push buttons. If one push
button is pressed, the one magnet is energized and acts on one yoke through the
soft iron pole-piece and shifts the pivoted arm to such a position that one of its
extremities lies in the path of one arm of the bell crank lever, and prevents the
movement of said lever. Hence, the spring held bolt can not be withdrawn when
the arm is in this position.
When it is desired to open the door, the other push button is pressed,
momentarily closing the other circuit and energizing the other magnet, which,
acting on the pole piece of the other yoke, reverses the position of the pivoted arm,
whereby it presents no obstacle to the withdrawal of the bolt, which may be operated
at will.
This construction allows the owner or person in charge of a store to lock the door
or doors leading from the establishment into the street by simply pressing a
button. A thief or evilly disposed person may thus be locked in and prevented
from escaping. It must be understood that I do not limit the invention to the
exact construction described, as I am aware that many different forms of the
device may be employed without departing from the spirit of the invention.
Dated this 12th day of March 1897.

page_text: I, EGIDIUS JULIUS MARY SCHEEREN, of 1300, Colfax Avenue, in the City of
Denver, State of Colorado, United States of America, Gentleman, 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 improvements in electro-magnetic appliances for lock-
ing doors, whereby the movement of the spring held bolt by the knob or other
actuating device is prevented, by pressing a push button.
The invention consists of the features hereinafter described and claimed, all of
which will be fully understood by reference to the accompanying drawing, in which
is illustrated an embodiment thereof.
In this drawing
Fig. 1 shows my improvements connected with or applied to a lock for an outside
door, one plate of the lock casing being removed.
Fig. 2 is a perspective view in detail of the device shown detached from the lock.
Figs. 3 and 4 illustrate another form of construction applied to a lock for an
inside door and operated on the same principle.
Fig. 5 is a section taken through the lock casing illustrating the construction
of the thumb levers.
Referring first to Figs. 1, 2 and 5, let the numeral 5 designate the spring held
bolt normally adapted to be withdrawn by pressing either of two thumb levers 4
(see Fig. 5), which engage and actuate a bell crank lever 6, fulcrumed at 7. The
levers 4 are fulcrumed in the door just below the lock casing, which is provided
with an opening to allow the thumb levers to act on the lever 6.
The levers 4 are provided with guard-flanges 4" to prevent the insertion of
anything from the outside that might interfere with the working of the levers.
The arm 6 of the lever 6 engages a stop 5" attached to the inner extremity of a
bolt 5. If the bell crank lever is actuated or turned on its fulcrum, the arm 6"
thereof will press against the stop 5" and withdraw the bolt from the locking
position. To enable me to prevent this withdrawal of the bolt, I employ an arm S
pivoted on a post 9 attached to the lock casing. To the extremities of the arm 8
are movably attached two yokes 10 and 10* respectively. The outer extremities
of these yokes project beyond the lock casing and carry pole-pieces 12, composed of
soft iron or other magnetic material, located in suitable proximity to two electric
magnets 13 and 13. These magnets are electrically connected with, or placed in
the circuits 15 and 16 respectively, of a battery 14 or other suitable source of
electricity. These circuits are normally open, but may be closed by pressing the
push buttons 17 and 18 respectively. If the push button 17 is pressed, the
magnet 13 is energized and acts on the yoke 10 through the soft iron pole-piece 12,
and shifts the arm 8 to the position shown in the drawing (see Fig. 1). When the
arm 8 is in this position, one of its extremities lies in the path of the arm 6ª of the
bell crank lever 6 and prevents the movement of said lever. Hence, the bolt 5 can
not be withdrawn when the arm 8 is in this position.
"
11
When it is desired to open the door, the button 18 is pressed, momentarily
closing the circuit 16 and energizing the magnet 13", which, acting on the pole-
piece 12 and the yoke 10, reverses the position of the arm 8, or shifts it to the
position shown by dotted lines in Fig. 1. When in this last named position, the
arm 8 presents no obstacle to the withdrawal of the bolt 5, which may be operated
at will.
The yokes 10 and 10° are provided with shallow recesses B adapted to engage
stop-pins D when the yokes have reached their limit of movement in either

page_text: irection. These pins temporarily lock the yokes in either position of adjustment,
but do not interfere with their movement when acted on by the magnets.
This construction allows the owner or person in charge of a store to lock the door
or doors leading from the establishment into the street by simply pressing a button.
A thief or other evilly disposed person may thus be locked in and prevented from
escaping.
In the construction shown in Figs. 3 and 4, the device 25 is employed. This
device is composed of the parts 25", 25, 25d and 25%. The part 25 is located
within the lock casing, while the part 25 is exteriorly located and provided with
the pole pieces 25% composed of magnetic material, as,soft iron. The parts 25°
and 25d are rigidly connected by the part 25°, which is pivoted to the casing at a
point 25. One arm of the part 25 is adapted to lie in the path of the device 26,
which must be actuated in order to withdraw the bolt 29. The device 26 is con-
nected with the bolt 29 by an arm 30. This is an ordinary lock mechanism, and
therefore, need not be illustrated or explained in detail.
The two magnets 27 and 28 are energized by closing the push button circuit
and are adapted to act upon the device 25. If the magnet 27 is energized, the
part 25 is projected into the path of the device 26, whereby the latter can not be
On the other
actuated by turning the knob of the door, or in the ordinary manner.
hand, if the magnet 28 is energized, the device 25 is actuated in such a manner as
to withdraw the part 25" from the path of the device 26, leaving the bolt 29 free
to be withdrawn in the usual manner.
Mechanical provision may be made for temporarily operating the parts 8 and 25,
for use in case the electrical apparatus gets out of repair.
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 I
claim is:-
1. The combination with the lock casing, of an arm pivoted on the casing and
enclosed thereby, said arm being adapted to move into the path of the bolt-
withdrawing device, yokes respectively attached to the arm extremities and carry-
ing pole-pieces projecting beyond the lock casing, two distinct electro magnets
located in suitable proximity to these pole pieces respectively, circuits normally
open in which the magnets respectively lie, and suitable means, as push buttons,
for alternately and momentarily closing the circuits, substantially as described.
2. The combination with a locking mechanism, of a suitable device movably
attached to the casing and adapted to be projected into the path of the bolt
withdrawing instrumentality, two electro magnets adapted, when energized, to
act respectively on two oppositely located parts of the said device, and two push-
button circuits in which the magnets respectively lie, whereby when one magnet is
energized, the device is shifted in one direction, and when the other magnet is
energized a reverse movement is imparted to the said device.
Dated this 19th day of January 1898.
EGIDIUS JULIUS MARY SCHEEREN.