Improvements in the Construction of Padlocks.
Year: 1891

page_text: Date of Application, 20th Aug., 1891
Complete Specification Left, 20th May, 1892--Accepted, 2nd July, 1892
PROVISIONAL SPECIFICATION.
Improvements in the Construction of Padlocks.
I, FREDERICK WILLIAM PINSON, of Dale Works, Willenhall in the County of
Stafford, Lock Manufacturer, do hereby declare the nature of this invention to be
as follows:-
:-
This invention has for its object the construction of padlocks in such manner that
the cases may be put together without riveting, and the mechanism be carried
within the cases independently of any studs pins or the like fixed to the metal of
the case, so that in fact no rivets, studs, pins or the like need to be used at all for
the case whether for fixing the parts thereof together or for holding therein the lock
mechanism, thus enabling thin sheet metal to be used for the cases.
The lock
A padlock constructed according to this invention has the case formed in two
parts, each of which is "raised" in sheet metal and consists of a plate (to form the
front or back of the case) and of a rim therearound forming a flange at right angles
thereto. The rim of one of these parts is of a just sufficiently smaller diameter
than the rim of the other to admit of its being pushed down inside it, and the rims
are of such depth that when the parts are put together, by being pushed up the one
within the other, the outer edge of the larger diameter rim will be just about flush
with the back or outer face of the plate of the other part. The parts are, prefer-
ably, of a circular shape so as when put together to form a circular case.
mechanism is carried upon a separate plate which is capable of being pushed just
tightly down within the rim of smaller diameter and against the inner face of the
plate around which such rim is formed. The drill pin and the pin for carrying the
shackle are also fixed to this plate. The inner or hinder end of the shackle pin
is cranked, and the portion which directly carries the shackle is formed on the
outer end of the crank and the rivet by which the pin is riveted to the plate projects
from the inner end of the crank, so that, while the portion of the pin which directly
carries the shackle is in convenient position therefor, the hole through which it is
riveted in the plate may be formed some distance inwards from the edge thereof.
This pin, being firmly fixed in the mauner described, does not need to enter a hole
in the front plate of the case, and thus no hole has to be formed in such plate to
receive it. The plate carrying the mechanism is pushed down into the part of the
case within which it is made to fit as described, and then the other portion of the
case having the rim of larger diameter is passed down over the portion of the case
having the rim of smaller diameter, and the outer edge of the larger diameter or
outer rim is pressed or spun over the corner or angle formed between the smaller
diameter or inner rim and its plate. The "raising" of the rim around the plate
forms a somewhat rounded corner which facilitates the bending thereover of the
outer edge of the rim of larger diameter. The two parts of the case are thus
firmly fixed together without any rivets, screws, or the like. In addition to the
plate which carries the mechanism fitting somewhat tightly within the portion of
the case into which it is pushed, it may be further held by the plate of the portion
of the case having the larger diameter rim pressing against the outer end of a stud
carried by the separate plate. The two rims, the one within the other as described,
take the place of the ordinary roundabout used for padlock cases. Openings are,
of course, cut out where required in the rims of the parts forming the case to
allow for the connection of the shackle and the passage of the spoon end into
the case.
Dated this 10th dor of Avoust 1891

page_text: COMPLETE SPECIFICATION.
Improvements in the Construction of Padlocks.
I, FREDERICK WILLIAM PINSON, of Dale Works, Willenhall in the County of
Stafford, Lock 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:--
This invention has for its object the construction of padlocks in such manner
that the cases may be put together without riveting, and the mechanism be carried
within the cases independently of any studs pins or the like fixed to the metal of
the case, so that in fact no rivets, studs, pins or the like need to be used at all for
the case whether for fixing the parts thereof together or for holding therein the
lock mechanism, thus enabling thin sheet metal to be used for the cases.
may, however, be made of any convenient thickness of metal; and may be cast if
preferred.
The cases
A padlock constructed according to this invention has the case formed in two
parts, each of which is "raised" in sheet metal (though each of such parts may be
cast, if preferred) and consists of a plate, to form the front or back of the case, and
of a rim therearound forming a flange at right angles thereto. The rim of one of
these parts is of a just sufficiently smaller diameter than the rim of the other to
admit of its being pushed down inside it; and the rims are of such depth that when
the parts are put together, by being pushed up the one within the other, the outer
edge of the larger diameter rim will project slightly beyond the back or outer face
of the plate of the other part. The parts are, preferably, of a circular shape so as
when put together to form a circular case. The lock mechanism is carried by a
separate plate which is capable of being pushed just tightly down within the rim of
smaller diameter and against the inner face of the plate around which such rim is
formed. The drill pin and the pin for carrying the shackle are also fixed to this
plate. The inner or hinder end of the shackle pin is cranked, and the portion
which directly carries the shackle is formed on the outer end of the crank, and the
rivet by which the pin is riveted to the plate projects from the inner end of the
crank, so that, while the portion of the pin which directly carries the shackle is in
convenient position therefor, the hole through which it is riveted in the plate may
be formed some distance inwards from the edge thereof. The back face of the
crank bears against the inner face of the plate and the pin is consequently so firmly
fixed by means of the rivet that it does not need to enter a hole in the front plate of
the case, and thus no hole has to be formed in such plate to receive it. The plate
carrying the mechanism is pushed down into the part of the case within which it is
made to fit as described, and then the other portion of the case having the rim of
larger diameter is passed down over the portion of the case having the rim of
smaller diameter, and the outer edge of the larger diameter or outer rim is pressed,
spun, or hammered, over the corner or exterior angle formed by the smaller
diameter or inner rim and its plate. The "raising" of the rim around the plate
forms a somewhat rounded corner, which facilitates the bending thereover of the
outer edge of the rim of larger diameter. The two parts of the case are thus
firmly fixed together without any rivets, screws, or the like.
In order that the invention may be clearly understood, I will proceed to describe
a practical application thereof by reference to the accompanying drawings, which
illustrate a padlock with a sheet metal case.
Figure 1 is a front elevation of the padlock, with the front plate removed or cut
away, and the rims of the case shewn in section as if cut through about the middle
thereof between the front and back plates.
Figure 2 is a transverse vertical section through the centre of the padlock, prior
to the hinder edge of the outer rim being riveted over the edge or corner which the
back plate makes with the inner rim.

page_text: Figure 3 is a corresponding view to Figure 2, but shews the edge of the outer
rim to be bent over to fix the two portions of the case permanently together. And
Figure 4 is a detached plan view of the pin on which the shackle is pivoted.
The case is formed in two separate parts A A¹, preferably circular in shape, as
shewn. The part A consists of a plate a surrounded with a rim b, and the part A¹
consists of a plate a' surrounded with a rim b. The rim is just sufficiently smaller
in diameter than the rim to be capable of being conveniently pushed inside it;
and the rim b¹ is of such depth as shewn that, when the part A is pushed as far as
it can be inside the part A', the edge of the rim b¹ projects slightly beyond the
back of the part A, as shewn by Figure 2. The two parts A and A' are fixed
together to form the complete case by pushing the one inside the other, as shewn
by Figure 2, and then bending the edge c of the rim b' over the corner d of the
part A, as shewn by Figure 3. The drill pin E, and the interior lock mechanism,
which may be of any usual or convenient character, are carried entirely by a
plate B which is pushed down, preferably tightly, into the part A of the case
before such part is inserted into the part A¹. This plate may be fixed by being a
sufficiently tight fit in the part A, but it is preferred to secure it also by punching
or denting in lugs e from the rim of the part A in position immediately at the
front of the plate.
The pivot pin D for the shackle is formed with a crank or arm f on its inner or
back end which has a rivet g standing backwards from it at the opposite end to that
at which the part of the pin occurs on which the shackle turns. The pin is fixed to
the plate, by means of the rivet g, in such position that the arm f extends outwards,
and thus the axis of the portion on which the shackle turns may be brought into
convenient position near the outside of the case while the rivet g by which the pin
is fixed is some distance in from the edge of the plate B. A hole is notched out
of the rim 6 for the inner or pivoted end of the shackle C, and a hole is punched
through the rim b' for such purpose; and in putting the shackle in place its end
is first pushed through the hole in the rim before the latter is passed over the
rim b, and the shackle is then passed on to the pin as the two parts of the case are
put together. Holes are also punched through the rims for the passage of the
spoon end of the shackle. The above described construction of pivot pin for
a padlock shackle will be useful also in other cases where it is desirable to have
the portion of the pin on which the shackle turns near the outside of the case, and
to rivet the pin in place at a point more within the case.
The plate B might of course be fixed inside the larger diameter rim; but the
arrangement above described is obviously preferable.
may be
While it is preferred to fix such plate without rivets or the like, it
riveted or similarly fixed to the back of the case, and its use even then is an
advantage, as enabling thin metal to be used for the case.
Having now particularly described and ascertained the nature of my said
invention, and in what manner the same is to be performed, I declare that what I
claim is :-
1. A padlock having the case constructed of two parts, of which one part is
formed with a rim which passes around the other part and is bent over or
around an edge or corner thereof to fix the parts together, substantially as
described.
2. A padlock having the case constructed of two parts each formed of a plate
and rim, of which the rim of one part fits inside the rim of the other part, and of
which the edge of one rim is bent over or around an edge or corner of the other
part to fix the parts together, substantially as described and shewn.
3. A padlock in which the interior mechanism is carried by a plate which is
preferably fixed within the case without the use of rivets, studs, pins, or the like
(though it may be riveted or similarly fixed to the back of the case) substantially
as described and shewn.

page_text: 4. A padlock having the case constructed of two parts fixed together substan-
tially in the manner described, and the interior mechanism carried by a plate which
is fixed within one of such parts substantially in the manner described.
5. The cranked pin or pivot for the shackle of a padlock, substantially as described,
for the purpose set forth.
6. A padlock constructed substantially in the manner described and shewn by the
drawings herewith.
Dated the 19th dove of Max 1800
STEPHEN WATKINS,
Wolverhampton, Agent for the. Applicant.