Improvements in Door Locks.
Year: 1897

page_text: Date of Application, 23rd Mar., 1897-Accepted, 22nd May, 1897
Improvements in Door Locks.
I, ARTHUR FLEISCHMANN, Clerk, of 747 Clybourne Avenue, Chicago, Cook
County, Illinois, United States of America, do hereby declare the nature of my
invention, and in what manner the same is to be performed, to be particularly
described and ascertained in and by the following statement :-
The object of my invention is to provide a simple, economical and efficient
compound lock; and the invention consists in the features, combinations and details
of construction hereinafter described and claimed.
In the accompanying drawings,
Figure 1 is a vertical side elevation of my improved lock with a portion of the
case removed, showing the interior operative mechanism ;
Fig. 2 a transverse sectional view, taken on line 2 of Fig. 1 looking in the
direction of the arrow;
Fig. 3 a similar view, taken on line 3 of Fig. 1 ;
Fig. 4 a similar view, taken on line 4 of Fig. 1;
Fig. 5 a detail view of one of the parts removed from the case; and
Fig. 6 a vertical sectional elevation of a portion of the mechanism, taken on
line 6 of Fig. 1, looking in the direction of the arrow.
In the art to which this invention relates, it is well known that it is very easy to
open the ordinary latch by means of a case knife, when such latch is also used as
the locking bolt. My invention, therefore, is principally designed to overcome
these objections, by providing a simple, economical and efficient compound lock, as
will be bereafter more fully set forth.
In constructing a lock in accordance with my invention, I provide a case, A, of
the desired size and shape, and adapted to contain and hold the different parts in
their operative positions. This case may be made in any of the usual manners-
that is, provided with the face plate, a, and cap, a', which cap is secured to the
main portion by means of the studs, a², a³ and at, and ordinary screws-not
shown.
I provide a latch, B, which, for convenience, I will term a primary locking bolt.
This latch is provided at its outer end with the usual curved surface, b, and is held
in place by means of a stud, 61, engaging with its slot, 62. Interposed between the
rear end of this primary locking bolt and the case is a helically coiled spring, C,
adapted to normally hold the locking bolt in its locking position, as shown clearly
in Fig. 1.
To make the lock more safe and secure against picking or opening by other than
the regular means, I provide a second locking bolt, D, which is usually termed in
ordinary locks "the dead bolt." In my improvements, however, it is a locking
bolt pure and simple, and not a dead bolt in the strict sense of the word. Interposed
between the rear end of the second locking bolt and the case is a helically coiled
spring, d, which acts to hold and return such locking bolt to its normal locking
position. In order to hold both locking bolts in their unlocking position, I provide
a latch composed of segmental pieces of metal, 63 and d, having their free ends
arranged to extend out into recesses, 6, d², in the face plate. The portions of these
latches which extend into the case are provided with projections, b, d³ adapted to
engage with notches, 6 and d, with which each bolt is provided, so that they may
hold such bolts in their inoperative or unlocked positions.

page_text: .
It is often desirable-when the mechanism is in its unlocked position-that in
opening and closing a door when leaving a room the lock should be operated
automatically, so as to throw both portions into locking position and prevent the
opening of a 'door other than with a key. In order to accomplish this result,
I provide the second locking bolt with a notch or groove, d³, arranged to be engaged
by the free end of the retaining pawl or latch, E, which is held therein by means
of a small spring, e. Arranged adjacent to this latch-so that one of its free ends
may contact the same-is a vibrating lever, F, having its opposite free end slotted,
as at f, and engaging a stud, 67, on the primary locking bolt. The arrangement of
parts is such that by moving the primary locking bolt back to its unlocked position,
the upper end of the lever is vibrated inwardly, and the lower end depressed so as
to contact and release the latch of the second locking bolt from engagement with
such locking bolt, so that such bolt is permitted to resume its normal locked position.
This operation is performed every time the door is closed and the other mechanisms
are not operated. In other words, this action is performed only when the primary
locking bolt is moved independently.
It is desirable to provide means by which the locking bolts may be operated
simultaneously or independently. To accomplish this result, I provide a compound
sliding bar, composed of a main portion, G, and a supplemental sliding portion, G¹,
mounted thereon. The main portion is provided with upper and lower extending
arms, g, g, arranged to contact pins, 68, d³, on each of the locking bolts, so that
when such slide is brought back to its inner limit of motion, both of the bolts are
also brought back; or when the second locking bolt is brought back to its unlocked
position and held therein--as shown in Fig. 1-the primary bolt may be operated.
To operate this main sliding bar and the supplemental sliding bar, also, I provide
the ordinary turn-bolt, but make it in two parts, H, H. The part, H, is provided
with a vibrating hub, h, at its inner end, and the turn-bolt, H, is provided with a
vibrating hub, h¹, at its inner end. The vibrating hub, h, is arranged as is
clearly shown in Figs. 4 and 5-to contact the main sliding bar only; while the
vibrating hub, ', contacts the supplemental slide only. The supplemental slide is
mounted like a saddle portion on the main portion of the sliding bar, so that
it may have at desired times free and independent or longitudinal movements.
Each of the parts of the turn-bolts are provided with knobs, I, 1,-knob I being
preferably on the inside of the door or in the room, and knob 11 on the outside of
the room. Collars, i, i, are inserted between the escutcheon, 2, 3, and the door, Z,
and act to hold the turn-bolts from longitudinal movement.
By turning the knob, I-which is on the inside of the door-the vibrating hub, h,
only is operated, and it acts to operate the main portion of the sliding bar only,
thus opening or unlocking both of the bolts if necessary. As the lever, F, is
pivotally mounted on the main portion of the sliding bar by means of a pin, f1,
the relative position of such lever is not disturbed when the main portion is moved,
so that the locking bolt is allowed to remain in its latched position.
It is desirable also to find means for locking the supplemental sliding bar, so that
it cannot be operated from the outside or the parts placed in their unlocked position
other than by the use of regular means. In order to hold this supplemental
sliding bar in its latched position, I provide it with a notch, 9, and arrange a latch
or pawl, K, so that one of its free ends may engage with the notch of the supplemental
sliding bar as shown in Fig. 1-and hold the same against a backward or inward
movement. In order to release such latch, however, I provide a key, L, of the
desired shape or size, and the casing with an opening, 1, through which such key
may be inserted to contact one of the free ends of the last named latch-as shown
in Fig. 1-to raise its inner end and permit the parts to be operated by the turn-
bolt, H. The supplemental slide bar is provided with a pin, g, arranged to
operate in a recess, 98, of the main portion, so that when it reaches its limit of
motion as indicated in Fig. 1-a further inward movement carries with it the
main portion to operate the locking bolts, the same as when the main sliding portion
is operated independently. A spring, M, may be used or not, as desired, (as shown

page_text: in Fig. 1) where it is interposed between the inner end of such main sliding bar
and the case, for the purpose of holding or returning the sliding bar to the position
shown in Fig. 1.
While I have described my invention with more or less minuteness as regards
details, and as being embodied in certain precise forms, I do not desire to be
limited thereto unduly, any more than is pointed out in the claims. On the contrary,
I contemplate all proper changes in form, construction and arrangement, the
omission of immaterial elements and the substitution of equivalents, as circumstances
may suggest or necessity render expedient.
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 a compound lock, the combination of a primary locking bolt, and a second
locking bolt arranged to be placed in a locking position by the movement of the
primary locking bolt, substantially as described.
2. In a compound lock, the combination of a primary locking bolt, a second
locking bolt, spring mechanism adapted to normally hold both of the locking bolts
in their locking position, latch mechanism arranged to hold the second locking
bolt in its unlocked position, and means interposed between the primary locking
bolt and the second locking bolt, whereby the second locking bolt is released by
the movement of the primary locking bolt, substantially as described.
3. In a compound lock, the combination of a primary locking bolt, a second
locking bolt, spring mechanism for normally holding the locking bolts in their
locking position, a slide arranged to withdraw the bolts from their locking position,
latch mechanism for holding the second locking bolt in its unlocked position, and
a lever pivoted to the slide and engaged by the primary locking bolt, whereby the
second bolt is released by the independent movement of the primary locking bolt
only and not disturbed when the primary locking bolt is moved by the slide,
substantially as described.
4. In a compound lock, the combination of a primary locking bolt, a second
locking bolt, spring or similar mechanism for normally holding the locking bolts
in their locking position, latch mechanism for holding the second locking bolt in its
unlocked position, a compound slide arranged to withdraw the bolts from their
locking position, a lever pivoted to the main portion of the slide and engaging
with the latch mechanism and with the primary bolt, whereby the latch mechanism -
of the second bolt is released by the independent movement only of the primary
bolt, latch mechanism for preventing the movement of the second portion of the
compound slide, a knob and turn bolt arranged to operate the main slide from one
side of the door and the supplemental or second slide from the opposite side of the
door, and key mechanism for releasing the latch of the supplemental slide,
substantially as described.
.
с ML 1007
HASELTINE, LAKE & Co.,
45 Southampton Buildings, W.C., Agents for the Applicant.