Year: 1897

page_text: I, JOHN HENRY DOSCHER, of 100, Columbus Avenue, Brooklyn, in the County
of Kings, State of New York, U.S.A., Gentleman, do hereby declare the nature
of this invention to be as follows:-
This invention relates to door-locks; and its object is to provide means whereby
the insertion of a key into a lock of my improved construction or of ordinary
construction will cause an electric bell to be rung, and such bell will continue to
ring while the key remains inserted in the keyhole, a further feature of my inven-
tion being the provision of a double-ended bolt which is capable of simultaneous
engagement with the jambs at either side of the door.
The means for actuating an electric bell by the simple insertion of a key consist,
broadly, of two contact-plates representing the opposite poles of a battery, said
plates being contained within or formed by insulated parts of a lock, said contacts
being arranged to be put in circuit by connection with an ordinary key by a piece
intermediate said contacts and key and capable of moving into circuit by the
simple insertion of a key.
My lock construction comprises a pair of bolts arranged in parallel lines and
pivotally connected at opposite ends by a eonnecting-piece, which is normally
spring-held at right angles with said bolts, which are normally shot. A catch-
piece is pivoted in the lock adjacent to the said connecting-piece, said catch being
adapted to engage therewith and prevent retraction of the bolts, said catch-piece
being operated only from the inside of the door.
I am aware that a small contact-plate may be inserted, properly insulated, in
any ordinary lock in such a position as to lie in the path of the key in entering
the keyhole, and I wish it to be clearly understood that the feature of such a
contact-plate so arranged and wired in an ordinary manner is an essential part of
my invention.
As will be readily perceived, it is impossible with my invention for a key to
be inserted into a lock without causing a beli to ring, and such bell must continue
to ring while the key remains in the lock, thus proving a certain alarm.
Dated this 20th dow of Tu 1807

page_text: Improvements in Alarm-locks.
I, JOHN HENRY DOSCHER, of 100, Columbus Avenue, Brooklyn, in the County
of Kings and State of New York, 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:-
This invention relates to door locks; and its object is to provide means whereby
the insertion of a key into a lock of my improved construction or of ordinary
construction will cause an electric bell to be rung, and such bell will continue to
ring while the key remains inserted in the keyhole, a further feature of my inven-
tion being the provision of a double-ended bolt which is capable of simultaneous
engagement with the jambs at either side of the door.
The means for actuating an electric bell by the simple insertion of a key consist,
broadly, of two contact plates representing the opposite poles of a, battery said
plates being contained within or formed by insulated parts of a lock, said contacts
being arranged to be put in circuit by connection with an ordinary key or by a
piece intermediate said contacts and key and capable of moving into circuit by the
simple insertion of a key.
My lock construction comprises a pair of bolts arranged in parallel lines and
pivotally connected at opposite ends by a connecting piece, which is normally
spring held at right angles with said bolts, which are normally "shot." A catch
piece is pivoted in the lock adjacent to the said connecting piece, said catch being
adapted to engage therewith and prevent retraction of the bolts, said catch piece
being operated only from the inside of the door.
In order that my invention may be clearly understood and explained in detail,
I have annexed drawings hereto, in which:
-
Figure 1 is a rear elevation of a doorway and door with my improved lock and
alarm represented.
Fig. 2 is a plan view of my lock with the top plate removed, clearly showing
the construction of parts.
Fig. 3 is a side sectional view taken on the line 3-3 of Fig. 2.
Fig. 4 is a plan view of a modified construction of lock in which the double
bolt right angular connecting piece is provided with key-actuated jaws, the contact
points consisting of the lock itself and a little piece of metal set in the lock plate
at the keyhole and insulated therefrom. The lock is retracted in this view.
Fig. 5 is a similar view to Fig. 4, but with the bolts shot.
Fig. 6 is a longitudinal vertical side sectional view taken on the line 6-6 of
Fig. 5.
Proceeding first with the description of the construction shown in Figs. 1, 2,
and 3, A indicates a side plate of a lock, and 'A¹ a door-jamb having secured thereon
two separate contacts a a¹, which are effectively insulated from each other and
separated from the plate A. Said contacts have beveled edges b. B indicates
a sliding piece or bar which is held at one end between insulation ce by screw c¹
or the equivalent, insulated through guides d, and is normally held by spring e
with its free end f adjacent to, but not touching both of the contacts a a¹. Said
end f is preferably coincidently inclined to the bevel of contacts a a¹, so that when
said piece B is pressed against said contacts a al it will effectively complete an
electric circuit and cause bell C to ring. The piece B where secured to plate A
is provided with a longitudinal slot g, allowing it a sliding movement within said
slot, and the adjacent end of said piece B has a beveled edge g¹. D is a keyhole,
and E a key part way inserted therein. In its forward movement the key comes

page_text: against bevel g¹, and in being pushed forward the rounded end of the key moves
past the bevel g¹, slightly displacing said piece B in so doing and moving it through
its guides upon the contacts a a¹, thereby ringing the bell, such ringing continuing
while the key remains in the lock. Findicates a cross beam or connecting piece
which is pivoted centrally to the plate A at h and has pivoted thereto at either end
the oppositely extending bolts GH, said bolt G being adapted to engage with the
jamb A¹ on the ordinary locking side of the door, and bolt H being adapted to
engage with the jamb j upon the opposite side, or that where the door is usually
hinged. It will be observed that when the key is inserted and turned to bear
against the lower portion of beam F this action will cause the bolts to be shot,
and when said key is turned to bear upon the upper portion of beam F the bolts
are retracted. I indicates a catch piece which is pivotally secured to the lock,
having an actuating device t, which is conveniently arranged on the inner side of
the door and which may be turned to bring its free end against beam F to hold said
beam stationary with its bolts in the locked position, from whence they cannot be
moved by a key or other means without first removing the catch I.
In the construction shown in Figs. 4, 5, and 6, the beam or connecting piece F
is provided with jaws h, k, which jaws are arranged to be acted upon by the key
to enable the beam to move the bolts G H into and out of engagement with the
door jambs. Spring H¹ serves to retain the bolts normally in the locked position.
The catch device I is in this construction formed of an elbow shape, comprising the
portions l, m, and is pivoted as a bell crank at n to the plate A. The portion / of
the catch is passed through á slot o in plate A, and the catch device may be
operated thereby. J is a spring bearing upon a projection 2 on catch I and
designed to frictionally retain said catch to hold the bolts in the locked or shot
position. In this modification likewise contact is somewhat differently made. is
the contact-piece, being set in and insulated from the lock-plate by non-conducting
material r, a wire from said contact piece and a wire from the lock itself. forming
the opposite poles of a battery. Said contact q is placed right against the keyhole,
forming, in fact, a portion of its line, so that the key when being inserted will
touch against both the said contact 7 and the lock plate proper, thus completing
the circuit and ringing the bell.
q
I am aware that a small contact plate, such as that indicated at q in Figs. 4, 5,
and 6, may be inserted, properly insulated, in any ordinary lock in such a position
as to lie in the path of the key in entering the keyhole, as, for instance, is illus-
trated in the construction of my improved lock illustrating this application, and
I wish it to be clearly understood that the feature of such a contact plate so
árranged and wired in an ordinary manner is an essential part of my invention.
As will be readily perceived, it is impossible with my invention for a key to be
inserted into a lock without causing a bell to ring, and such bell must continue to
ring while the key remains in the lock, thus proving a certain alarm.
I am aware of previous devices wherein when the key is turned in a lock it
will make an electrical connection and ring a bell, but the person attempting
to open a door so secured would at once release his hold of the key upon hearing
the bell, when the bell would cease ringing, perhaps before the inmates were
aroused but he would not necessarily withdraw the key.
By my construction and with the bell continually sounding while the key
remains in the lock, the inmates could not fail to be aroused and enabled to
protect their property.
The feature of the double bolt herein shown and described is that if the hinges
of the door should be removed the door would still be secure by reason of the bolt
which engages with the rear door jamb.
Having now particularly described and ascertained the nature of my said inven-
tion, and in what manner the same is to be performed, I declare that what I
claim is:
1. In an alarm lock an electric contact situated in and insulated from said lock

page_text: and arranged in the path of a key entering the keyhole of said lock, the lock itself
forming an opposite electric contact, substantially as set forth.
2. The combination with a lock of a pair of parallel bolts therefor, operating
eppositely to enter one each the jamb at either side of a door, and means for
operating said bolts simultaneously.