Improvements in Tumbler Locks.
Year: 1899

page_text: Date of Application, 16th Jan., 1899-Accepted, 25th Mar., 1899
COMPLETE SPECIFICATION.
Improvements in Tumbler Locks.
I, SUMNER SHAW, of Boston, County of Suffolk, State of Massachusetts, United
States of America, Manufacturer, 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:-
Reference being had to the accompanying drawings.
Fig. 1 represents a side view of the improved lock showing the cover removed
and portions of the interior mechanism in section for the better illustration of
said mechanism.
Fig. 2 represents a vertical section on the line 2-2 shown in Fig. 1.
Fig. 3 represents a vertical section on the line 3-3 also shown in Fig. 1.
Fig. 4 represents a side elevation of one of the tumblers.
Fig. 5 represents a side elevation of one of the stationary partitions between
the tumblers, and
Fig. 6 represents a side view of the key.
Similar letters refer to similar parts wherever they occur on the different parts
of the drawings.
a is the case with its detachable cover a¹ as usual.
e represents the bolt which is guided in its rear end by having the stationary
pin a projecting through a slotted perforation in said bolt as is common in
locks of this kind.
Within the upper portion of the case a are secured a number of stationary plates
or partitions f f f preferably by means of fastening screws f' f' and between such
partitions are arranged the tumblers h h which are loosely pivoted on a pin g so
as to swing thereon when raised by the key.
h³ represents a spring secured to the rear end of each tumbler and to the case a
as shown in Fig. 1 for the purpose of returning the tumblers to their normal
positions after the bolt e is fully opened or closed.
To the bolt e is firmly secured the upwardly projecting yoke having upper
and lower locking ribs and for the tumblers h h the latter having corre
sponding locking recesses h¹ and h² as shown in Figs. 1, 2, and 3.
On the underside of each tumbler h, back of the recess 2 is made another
recess h which serves to hold the bolt in an unlocked position by interleeking
with the lower locking rib on the yoke k as shown in Figs. 1 and 4. f³ is an
longated notch on the underside of each partition plate f for the purpose of
allowing the yoke k and its lower locking rib to be moved forward and back
vithout interfering with the said plates ƒ ƒ.
Each tumbler has on its underside a curved recess h³, shown in Fig. 4 and in
lotted lines in Fig. 1, each such recess being different from the others in the
eries and corresponding in depth to the different teeth on the key 7, said key
aving recesses 12, 12 between said teeth to enable the key to be turned without
nterfering with the stationary partitions.
m is the tumbler cylinder having its ends journaled in bearings in the case a
J

page_text: and cover a as shown in Figs. 1 and 2. m³ is a longitudinal slit through the
tumbler cylinder m for receiving the body of the key, and m² m² are cylindrical
perforations through said tumbler cylinder which form a continuation of the
slit m³, such cylindrical perforations serving to receive the cylindrical back
portion of the key l, as shown in Figs. 1 and 6.
Intermediate between the tumbler cylinder m and the bolt e is located a lever d
which is pivoted on a stationary pin d' as shown. The upper end of the lever d
is slotted or forked as shown at d in Fig. 1 and through said slotted or forked
portion is inserted a pin m² attached to the tumbler cylinder m as shown the
lower end of the lever d is provided with a curved slot d' adapted to receive a
pin e secured to the bolt e as shown in Figs. 1 and 2.
In the drawings the bolt e is shown in a locked position. To unlock the bolt it
is only necessary to insert the key in the slit m in the tumbler cylinder m with
its back inserted in the cylindrical recess m in said tumbler cylinder; if now
the key and tumbler cylinder are turned in the direction of the arrow shown in
Fig. 1 it causes first the tumblers h h to be raised out of engagement with the
lower rib on the yoke and at the same time causes the lever d to be turned
around its fulcrum without imparting motion to the bolt e by reason of the
curved slot on said lever d.
During the subsequent continuous motion of the tumbler cylinder, the lever d
causes the end of the slot d³ in the lever d to actuate the pin e¹ attached to the
bolt e by which the latter is moved inwards in the direction of the arrow shown
on said bolt in Fig. 1 thus causing said bolt to be unlocked.
To lock the bolt prefer to insert the back of the key in the cylindrical
recess in the tumbler cylinder m and the body of the key in the slit m³. If
now the key and tumbler cylinder are turned in an opposite direction to that shown
by the arrow in Fig. 1 the tumblers h h are first raised out of engagement with
the lower rib of the yoke k and at the same time the lever d is caused to be
rocked without imparting motion to the bolt e by reason of the curved slot d³ in
said lever.
During the subsequent continuous motion of the tumbler cylinder, the lever d
causes the end of the slot in the lever d to actuate the pin e¹ attached to the
bolte by which the latter is moved outwards in a direction opposite to that
shown by the arrow in Fig. 1 thus causing said bolt to be locked. The notches h³
on the tumblers are held interlocked with the rib on the yoke k when the
bolt e is locked, and the notches on said tumblers are likewise held interlocked
with said rib on the yoke when the bolt is unlocked so as to prevent the
opening and closing of the bolt except by the turning of the tumbler cylinder m,
by means of a specially constructed key,
Having now particularly described and ascertained the nature of this inven
tion and in what manner the same is to be performed, I declare that what I
claim is:-
1. In a tumbler lock the movable notched tumblers h h and intermediate
stationary, recessed division plates f f combined with the bolt e having a yoke k
adapted to interlock with said tumblers, a rotary key receiving tumbler cylinder
and a lever d pivoted intermediate between the tumbler cylinder and bolt and
pivotally connected to said parts, substantially as and for the purpose set forth.
2. In a tumbler lock, in combination, a series of yielding pivoted, notched
tuble, a series of intermediate stationary division plates. a key receiving
tumbler cylinder, a locking bolt having a yoke adapted to interlock with the
notched tumbles and a lever pivoted intermediate between the tumbler cylinder
and locking bolt and having its ends pivotally connected to said bolt and
tumblr cylinder, substantially as and tor the purpose set forth.
3. In a tumbler lock, a series of pivoted tumblers and intermediate stationary
division plates. combined with a locking bolt having means for interlocking it
with the tumblers, a key receiving tumbler cylinder and a lever pivoted inter

page_text: mediate between said tumbler cylinder and bolt, and having slotted or forked
portions at its ends and means for connecting the ends of said lever to the tumbler
cylinder and bolt, substantially as and for the purpose set forth.
Dated this 16th day of January 1899.
HERBERT HADDAN & Co.,
Agents to Applicant,
18, Buckingham Street, Strand, W.C., London.
HERBERT HADDAN & Co.,
Agents to Applicant,
18, Buckingham Street, Strand, W.C., London.