Improvements in Door Locks.
Year: 1899

page_text: Date of Application, 10th Jan., 1899-Accepted. 29th Apr., 1899
COMPLETE SPECIFICATION.
Improvements in Door Locks.
We, OSCAR KATZENBERGER, residing in Newton Alley, in the City of San
Antonio, County of Bexar and State of Texas, U.S.A., Jeweler, HERBERT UIIL,
residing on South Pressa Street, near the Insane Asylum, in the City of San
Antonio, County of Bexar and State of Texas, U.S.A., Dairyman, and CHARLES
MAX UHL, residing on South Pressa and Devine Streets, in the City of San
Antonio, County of Bexar and State of Texas, U.S.A., Mechanician, do hereby
declare the nature of this invention and in what manner the same is to be per-
formed, to be particularly described and ascertained in and by the following
-statement:-
1
This invention relates to combination locks especially adapted for use upon
doors, but which may be used wherever an ordinary lock is to be employed. One
of the objects of the invention is to so construct the improved lock that although
tumblers are used, set according to a predetermined combination of figures with
letters, the bolt and the latch can be operated from the same knob spindle when
the proper combination has been found, and whereby the combination of tumblers
may be placed in such position that they will not act upon the bolt, and wherein
at that time the lock and latches may be operated from the same spindle as
readily as though the spindle were that upon an ordinary lock. Another object
of the invention is to provide an auxiliary bolt that is independent of the combina-
tion controlled bolt, and which may be brought into action at any time. A
further object of the invention is to provide a look of the character above set
forth that may be used without a key, or constructed in such a manner that n
key may be used to operate the tumblers from the outside of the door, the key
in such instance being used in lieu of a knob.
The invention consists in the novel construction and combination of the several
parts, as will be hereinafter fully set forth and nointed out in the claims.
Reference is to be had to the accompanying drawings forming a part of this
specification, in which similar characters of reference indicate corresponding
parts in all the figures.
Fig. I, is an inner face view of the improved lock applied;
Fig. II, is a horizon'al section through a portion of the door and one of the
door jambs showing the lock in plan view;
Fig. III, is a plan view of the lock separated from the door, illustrating the
bolts within the lock casing;
Fig. IV, is a view similar to Fig. III, illustrating the main bolt as shot out,
or in locking position;
Fig. V, is a transverse section through the lock taken practically on the
line 5-5 of Fix. III:

page_text: Fig. VI, is a section through the door and through one of the tumblers, the
section being substantially on the line 6-6 of Fig. 1;
Fig. VII, is a view in perspective of a key which may be used in connection
with the lock.
A represents a lock casing of any desired form. Usually, however, this casing
is made rectangular. B represents the main bolt, which is adapted to have
sliding movement in the said casing, and to extend out at the front edge thereof.
The main locking bolt B is provided with a longitudinal slot 10 at its heel or
inner portion, and a screw 11 is passed through this slot into the casing, forming
a guide for the bolt; and in addition to the guide screw 11, a second guide 12,
which is in the nature of a pin, is located below the bolt, being adapted to
engage with its lower edge when the bolt is carried to its outer position, as illus-
trated in Fig. IV.
In the upper edge of the bolt, near its outer end, a substantially V-shaped
recess 13 is made; and furthermore, in the upper edge of the bolt between the
recess 13 and the inner end of the bolt, two cavities 14 and 15 are produced, while
in the bottom edge of the bolt four cavities 16, 16, 17 and 18 are made, as shown
in both Figs. III and IV. Upon the inner face of the bolt, just below the
recess 13, a lug 19 is longitudinally formed, which lug at its forward end is
provided with a reduced or depressed surface 20.
A spindle 21 is journaled in the casing just above the bolt, and the said
spindle is provided with a knob 22 at each of its ends outside of the lock casing.
The knob spindle 21 is further provided with a finger or crank arm 23. which
is adapted to enter the recess 13, and by bearing upon the outer face of the said
recess throw the bolt B to its outer position, returning the said bolt to its inner
position by engagement with the inner wall of the said recess 13. The outward
and upward movement of the crank arm or finger 23 is limited by a pin 24, as
shown in Figs. III and IV.
A latch plate 25 is pivoted on the bolt B by the guide screw 11 above men-
tioned; and at the inner end of the latch plate 25 a head 26 is formed. one
member 26 whereof extends above the bolt, and a second member 26 extends
helow the bolt, the lower member 26 being continuous with or attached to
horizontal arm 27, which extends below the bolt B, as shown also in Figs. IIT
and IV. The forward or outer end of the latch plate 25 has a foot 28 formed
thereon, which when the bolt is in its inner position, or within the casing, extends
over the reduced surface 20 of the longitudinal lug 19 on the said bolt. as shown
in Fig. III. effectually preventing the bolt from being drawn outward.
A spring 29 is made to bear against the upper head section 26 of the latch
plate at one end, the other end of the spring being secured in the lock casing,
and the tendency of the said spring is to carry the foot of the latch plate awav
from the lug 19 on the bolt B, as shown in Fig. IV; and a second spring 30.
carried by a suitable stud. is made to have bearing against the casing and
against the upper edge of the bolt at its inner end, the spring 30 being adapted
to steady the movement of the said bolt B.
The spring 29 has hearing upon a cam 31, which is preferably of oval shane
and is pivoted in the forward unner corner of the casing above the bolt and its
latch plate; and a latch head 32 is carried by the said cam, said head extending
out through an opening in the casing in like manner as the holt B. the latch 32
being beveled, and corresponds to the ordinary spring latch of a bolt. The latch
has slight movement in the cam, and the cam at its forward lower edge is provided
with a nose 33, against which the finger or crank arm 23 of the knob spindle may
en age.
The bolt being in locking position, and the finger of the knob spindle in the
Position shown in Fig. IV, when the knob of the spindle is turned to cause the
finger to engage with the rear wall of the slot 13 in the bolt, the bolt will be
carried inward, and when the bolt has reached its innermost position, the said

page_text: finger or crank arm 23 of the spindle may be carried to an engagement with
the cam 31, and will force the said cam upward, thus drawing the latch 32 within
the casing, the nose 33 stopping the outward movement of the said finger or
crank arm 23 when the latch 32 is entirely drawn within the casing, or drawn
within the casing sufficiently to admit of the opening of the door. When the
knob of the spindle 21 is released, the spring 29 will return the latch 32 to its
normal or outward position, so that the door may be closed and held closed by
said latch. It is evident that the latch 32 may be operated entirely independent
of the bolt B.
In connection with the bolt B, three rotary tumblers designated respectively
as D, D and D³ are preferably employed. The tumbler D is located above the
bolt, while the tumblers D and D are located below the bolt. The tumblers Di
and D are identical in construction, and one of these tumblers is shown in
sectional detail in Fig. VI, wherein it will be observed that the tumbler consists
of a disk 34, provided with a flat peripheral surface 35 and a semi-circular
flange 36 which is secured to the disk base, the curved surface of the flange facing
the flattened peripheral edge 35 of the disk base, while the open portion of the
flange faces the circular portion of the disk face, as shown in Figs. III and IV.
The tumbler D, located above the bolt, is essentially of the same construction,
the only difference being that the position of the flange is reversed so that the
open portion of the same, faces the flattened peripheral edge of the disc base. A
spindle 37 is passed through each of the rotary tumblers at the center, and the said
spindles are passed through the casing of the lock, extending beyond both sidea.
The spindles of each rotary tumbler may be provided at both ends with a knob 38,
or at the inner end only, as shown in Fig. VI; and the knob, when employed,
is provided with a pointer 39 adapted to travel over a dial 40, which dial is in
divisions, and the divisions are designated by letters, figures or characters of any
description, as shown in Fig. I. When, however, a knob 38 is secured to the
inner end only of the spindle 37, an escutcheon 41 is secured upon the outer face
of the door to which the lock is applied, the escutcheon being provided with a
dial corresponding to the dial 40 on the outer face of the inner member of the
lock casing, and the spindle 37 is then provided with a slot 42, as shown also in
Fig. VI, in order that the spindle may be turned by any instrument that may
he capable of being fitted into the said slot. A nut 42" is located upon the
spindle 37 within the flange 36, and a spring 43 is located between the base
disk 34 of the rotary tumbler and the nut, while a second spring 44 is located
above the nut and engages with the outer plate of the lock casing, a frictional
engagement is thus established between the spindles and tumblers.
Thus it will be observed that when a tumbler is brought in engagement with
any point on the bolt B, the spindle may be turned so as to obtain the desired
combination. It is evident that each rotary tumbler may be provided with a
different combination, or that all of them may be set upon the same combination,
as may be desired.
In operation, when the bolt is within its casing, as shown in Fig. III, and
the circular portions of the rotary tumblers enter the cavities in the lower edge
of the bolt, the bolt cannot be forced outward, especially since when the circular
portion of the tumblers enter the cavities in the bolt, their flanges 36 will so
engage with the latch plate 25 and i arm 27 as to force the foot of the latch
plate downward over the recessed portion 20 of the lug 19, thus providing an
effective barrier against the outward movement of the bolt. When, however,
the rotary tumblers are turned so as to present their flattened surfaces 35 to the
bolt, as shown in Fig. IV, the flanges 36 of the tumbler will present their flattened
edges to the latch plate, and the holt will be free to be shot outvard to locking
position by the movement of the knob spindle 21, since the spring 29 will carry.
the latch plate from locking engagement with the holt. After the bolt is in its
lorking position, by turning the disk tumblers so as to carry their flat surfaces
away from the bolt and cause their central surfaces to enter adjacent recesses in

page_text: the bolt, the bolt cannot be forced inward until proper combination has been
found to restore the tumblers to the position shown in Fig. .IV. When the
bolt is locked in its outer position the heel 28 of the latch plate is forced down-
ward at the rear of the lug 19 on the bolt. It will be understood that the latch
plate is carried to locking position by engagement with the flanges of the tumblers,
and when said flanges are out of engagement with the latch plate the plate is raised
by its spring 29. .
If knobs are to be attached at both ends of the spindles controlling the rotary
tumblers, a key 46 may be employed, shown in Fig. VII, provided with a pointer
48 and a flattened end 47 adjacent to the pointer, the flattened end of the kay
being adapted to be entered into the slot 42 of the spindle, and the pointer being
used to obtain the necessary combination for placing the rotary tumbler carried
by the disk in proper position to admit of the bolt being shot by the movement
of the spindle 21.
In connection with the lock, we also preferably employ an auxiliary bolt 43°
independent of the bolt B, the auxiliary bolt 43" being provided with a spring 44*,
which offers a slight resistance to the movement of the bolt, and with a finger
piece 45, which extends out through the lock casing, as is best shown in Figs. ÏII
and IV.
This lock is exceedingly simple, durable and economical, is not at all liable
to get out of order, and the combination of the rotary tumblers may be con-
veniently set.
Having now particularly described and ascertained the nature of our said
invention, and in what manner the same is to be performed, we declare that what
we claim is:―
1. In a lock, a bolt, means for moving the bolt, and rotary tumblers arranged
to enter recesses in the said bolt, for the purpose set forth.
2. In a lock, a bolt, means for operating the holt, rotary tumblers arranged to
enter recesses in the bolt, devices for operating the said tumblers from the
exterior of the lock, and a latch plate for the bolt operated by the tumblers, for
the purpose set forth.
3. In a lock, a bolt, means for operating the bolt, a keeper on the holt, a spring-
controlled latch plate adapted for engagement with the said keeper, the bolt being
provided with recesses in its edges, and rotary tumblers operative from the exterior
of the lock, which tumblers are adapted to enter the recesses in the bolt whether
the bolt be in its outer or in its inner position, and the said tumblers being also
so constructed as to free the bolt from locking engagement therewith when
necessary, for the purpose set forth.
4. A lock provided with a tumbler-controlled bolt, a spring latch, a knoh
spindle, a projection from the knob spindle arranged to operate the bolt and
operate the latch on the return movement of the bolt, and means for operating
the said tumblers from the exterior of the lock, for the purpose described.
5. In a lock, the combination, with a casing, a bolt held to slide in the said
casing, having recesses in its upper and its lower edges, a keeper lug secured
upon one of its faces, and a pivoted spring-controlled lock latch arranged for
engagement with the keeper of the bolt, of tumblers arranged to enter the recesses
in the said holt, means for operating the tumblers from the exterior of the lock,
the said tumblers consisting of disks having a flattened peripheral surface. Femi-
circular flanges secured upon the said disks, arranged to operate the said latch
plate, and spindles in connection with which the tumblers are in frictional engage-
ment. for the purpose specified.
6. In a lock, the combination, with a casing, a main bolt and a locking plate
for the main holt, of rotary tumblers adapted for locking engagement with the
main belt and for actuating engagement with the latch, a spring latch independent

page_text: of the bolt, a knob spindle and means for operating the spring latch and bolt
iron the said knob spindle for the purpose set forth.
Dated this 9th day of January 1899.
CRUIKSHANK & FAIRWEATHER,
Chartered Patent Agents,
62, Saint Vincent Street, Glasgow,
Agents for the 'Applicants.
CRUIKSHANK & FAIRWEATHER,
Chartered Patent Agents,
62, Saint Vincent Street, Glasgow,
Agents for the 'Applicants.