An Improved Permutation Padlock.
Year: 1893

page_text: Date of Application, 27th Dec., 1893-Accepted, 10th Feb., 1894
COMIDDIN SL BULTIVATION,
An Improved Permutation Padlock.
We, WILLIAM HENRY BOLTHOFF, Machinist, of 622 Thirty-first Avenue,
Denver, County of Arapahoe, State of Colorado, United States of America, and
WILLIAM PRESTON SMITH, Broker, of Aspen, County of Pitkin, State of
Colorado, United States of America, do hereby declare the nature of this inven-
tion, and in what manner the same is to be performed, to be particularly described
and ascertained, in and by the following statement:-
Our invention relates to improvements in permutation padlocks, and 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 is a side elevation of the lock.
Fig. 2 is a longitudinal section taken on the line B-B, Fig. 1.
Figs. 3, 4, 5 and 6 are cross sections taken on the lines y-y, -,x−x, and p—p,
respectively.
Fig. 7 is a detail view on an enlarged scale of the pin which connects the knob
and the shackle.
Similar reference characters indicating corresponding parts or elements in these
views, let the numeral 5 designate the outer shell or casing of the lock, enclosing
the tumblers 6, and the separating rings 7. These tumblers consist of disks
provided with elongated central apertures 6". To the shell 5 is applied a ring 8
which is shouldered as shown at 84 to engage the shell, its reduced portion being
exteriorly threaded to engage the correspondingly threaded interior portion of the
shell extremity. This ring, when applied to the shell or screwed to position, abuts
against the adjacent tumbler of the lock and maintains the tumblers and rings in
operative relation within the shell.
The shackle is composed of a hook 9, and a stem 9, the hook and the stem being
formed integral. It is provided with a shoulder 9 formed at right angles to the
stem.
This shouldered part of the shackle enters a recess 8c formed in the ring, and a
recess 5ª formed in the shell. In assembling the parts, these two recesses must
coincide as to position. The ring. 8 is further provided with a shallow recess
adapted to receive the free extremity of the shackle when the parts are in the
locked position.
The stem of the shackle is provided with a number of recesses 91, corresponding
with the number of the tumblers. When the shackle is in the locked position, the
tumblers lie in the same plane with their corresponding recesses in the stem of the
shackle. The stem of the shackle is shaped to enter the elongated apertures
formed in the tumblers when the latter are all arranged to exactly coincide. The
stem of the shackle is provided with a longitudinal recess 13 to receive the pin 12
which is composed of the enlarged extremities 12" and 12, and the intermediate
reduced portions 12d. The end 12 is adapted to fit nicely within the recess 13, and
is locked therein by a pin 14 passed through the stem and lying in the path of the
shoulder of the extremity 12ª The pin 14 is so located that it allows the shackle
the movement required to permit the part retained by the shackle to pass between
the-hook extremity thereof and ring 8 of the lock.
The shell or casing 5 is provided interiorly with two shoulders 5 and 5
respectively. One of the separating rings 7 abuts against the shoulder 5, while
the shoulder 5 is engaged by a disk 15 which is centrally apertured to receive the
extremity 12 of the connecting pin.

page_text: The disk 15 is provided with a projecting sleeve 15%, which enters an interior
counterpart recess formed in the rotatable knob 16. The knob, the sleeve and the
extremity 12 of the connecting pin are apertured to receive a cross pin 18 which
locks the said parts together.
The disk 15 is provided with a pin 15 which passes through one of the apertures
formed in the adjacent tumbler 6, and projects on the opposite side.
The next tumbler is provided with a pin 6 which projects from both surfaces
thereof, the one extremity being in the path of the pin 15, and the other
extremity in the path of the pin 6 of the last tumbler, or that abutting against the
ring 8.
It will thus be seen that all the tumblers may be manipulated by rotating the
knob, while the combination may be changed by passing the pin 15° through a
different aperture in the adjacent tumbler which contains a series of apertures as
shown in Fig. 3.
To unlock the mechanism, the tumblers are moved through the agency of the
knob until all the central apertures through which the stem of the shackle passes,
exactly coincide. The shackle may then be drawn outward sufficiently to release
the parts engaged thereby. The stem of the shackle is prevented from slipping
entirely out of the lock by the engagement of its cross pin 14 with the extremity 12ª
of the connecting pin.
This mechanism is compact, very secure and easily operated.
To disassociate the parts, the device is first unlocked. The piu 18 is then
removed, when the stem of the shackle may be separated from the tumblers. The
ring 8 is theu unscrewed, when all the parts enclosed by the shell may be
removed.
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 permutation padlock, the combination with the casing, of the tumblers,
the separating rings, and the apertured disk enclosed by the casing, the screw ring
for locking the parts in place, and the reciprocating integral shackle having a
stem which enters central apertures forined in the tumblers, said stem being
provided with recesses adapted to receive the edges of the tumblers, a connecting
pin 12 having a shoulder 1 entering a longitudinal recess formed in the stem, the
pin 12 being movable within the recess, a rotatable knob and a cross pin which
passes through coinciding apertures formed in the knob, the apertured disk and the
connecting pin, substantially as described.
2. In a permutation padlock, the combination of the casing, the rotatable knob,
the tumblers, the separating rings, the apertured disk connected with the adjacent
tumbler, the reciprocating shackle, the shouldered connecting pin, and means for
connecting the knob, the apertured disk, and the connecting pin in operative
relation, substantially as described.
Denver, November 22nd 1893.
Sigued in presence of :-
A. J. O'BRIEN,
CHAS. E. DAWSON.
WILLIAM HENRY BOLthoff.
WILLIAM PRESTON SMITH.