Improvements in Padlocks, and in the Manufacture of the Cases of the same.
Year: 1893

page_text: Date of Application, 18th May, 1893
Complete Specification Left, 19th Feb., 1894-Accepted, 31st Mar., 1894
PROVISIONAL SPECIFICATION.
Improvements in Padlocks, and in the Manufacture of the Cases of
the same.
I, ARTHUR RAYMOND TONKS, of 56 New Road, Willenhall, Staffordshire,
Lock Manufacturer, do hereby declare the nature of this invention to be. as
follows:-
This invention has reference to padlocks and this invention consists firstly of an
improved construction and arrangement of the lock case and locking mechanism
whereby I am enabled to make the lock case. in one piece stamped from sheet
metal instead of as heretofore being made with a loose side plate. I thus reduce
the cost of manufacture of the said locks and as the lock case is made in one piece
it is stronger than heretofore. My said invention also comprises an
improved
method of making the said lock cases when made in a picce from sheet metal.
"
I make the padlock case that is the two side cheeks and the round-about or
flange (which in the common padlock cases secures the edges of the cheeks
together) in one piece of inetal either by stamping or raising from sheet metal as
hereinafter described. Fitting in the open top of this case is what I call the top
plate which by loops or bearings fixed underneath carries the shut or bolt and the
tumbler or lever mechanism. By the "top of the lock case I mean that part
which is top when the padlock is hanging by its shackle. This top plate is by
preference fixed in the lock case by the top plate having a front projecting piece
which takes into a hole in the lock case and by two side ears formed on the top
plate corresponding with the two ears of the case to which the shackle is jointed
the rivet securing the shackle to the lock case passing also through the two ears
on the top plate. As the two side cheeks are made in one piece the padlock case
is much stronger than heretofore.
When the padlock is made with wards for the key these wards are fixed to or
formed with a plate which lies against one of the cheeks and is fixed to or formed
with the said "top plate."
In making the said lock case from sheet metal I take a blank of suitable shape
and then by means of dies worked in a press or stamp I raise the metal into the
shape of an open topped body of the lock case with a web or flange projecting
around the top. This web or flange is then by suitable dies clipped off so as to
leave the four cars two on each side cheek projecting outwardly at about right
angles thereto. The lock case in this state is then forced into a die which bends
the ears into the plane of their respective cheeks. The key is pierced in by a
subsequent process.
In making padlock cases as above described I may use sheet brass sheet steel or
other suitable sheet metal or alloy.
Dated this 17th day of May 1893.

page_text: COMPLETE SPECIFICATION.
Improvements in Padlocks, and in the Manufacture of the Cases of
the same.
I, ARTHUR RAYMOND TONKS, of 56, New Road, Willenhall, Staffordshire,
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 reference to padlocks and consists firstly of an improved
construction and arrangement of the lock case and locking mechanism whereby I
am enabled to make the lock case in one piece stamped from sheet metal instead of
as heretofore being made with a loose side plate. I thus reduce the cost of
manufacture of the said locks and as the lock case is made in one piece it is
stronger than heretofore. My said invention also comprises an improved method
of making the said lock cases when made in a piece from sheet metal.
I will describe my invention by referring to the accompanying drawing on
which
Fig. 1 is a sectional elevation and a side elevation of a padlock constructed
according to this invention.
Fig. 2 is a plan of the same with the bow or shackle removed and
Fig. 3 is a general view of the part herein referred to as the top plate of the
padlock which carries the loops or bearings of the shut or bolt and the tumbler or
lever mechanism.
Fig. 4 shews a modified form of the said top plate when the padlock is made
with wards for the key ;
Fig. 5 is a general view of the sheet metal casing of the said padlock
separate ;
:
Fig. 6 shews a sheet metal blank for forming the said casing and
Figs. 7, 8, 9 and 10 shew successive stages in the manufacture of the lock casing
shewn by Fig. 5 from the sheet metal blank shewn by Fig. 6.
The same letters of reference indicate the same or corresponding parts in all the
figures of the drawing.
I make the padlock case A that is the two side cheeks and the roundabout or
flange (which in common padlock cases secures the edges of the cheeks together)
in one piece of metal (see Fig. 5) by stamping or raising from sheet metal as
hereinafter described. Fitting in the open top of this case A is what I call the
top plate B which by loops or bearings C¹ C fixed to it underneath carries the
shut or belt D (see Fig. 1) and the tumbler or lever mechanism when the padlock
is provided with such tumbler. or lever mechanism. It is to be understood that
by the "top" of the lock case I mean that part which is top. when the padlock is
hanging by its shackle E. This top plate B is by preference fixed in the lock
case A by the top plate B having a front projecting piece 61 which takes into a
hole a' (Figs. 1 and 3) in the lock case A and by the two side ears formed on
the top of the plate B corresponding with the two ears at a³ of the padlock case A
to which the shackle E is jointed the rivet f securing the shackle E to the lock
case A passing also through the two ears on the top plate B. As the two
side cheeks and the so called roundabout of the padlock case are made together
from one piece of metal as shewn in Fig. 5 the padlock case is much stronger than
when made in the usual way. In the top plate B there is provided a small hole
to admit the outer end of the bow shackle E..
When the padlock is made with wards for the key such for instance as those
marked g g in Fig. 4 these wards are fixed to or formed with a plate B' which
lies against that cheek which is farthest from the keyhole this plate B¹ being fixed
to or formed with the top plate B as shewn for instance by Fig. 4.1
:

page_text: In making the said padlock case A from sheet metal I take a sheet metal blank
such as shewn by Fig. 6 of suitable shape and then by means of dies worked in a
press or stamp I raise the metal by successive operations into the shape of an
open topped body A of the lock case see Fig. 9 with a web or flange a projecting
around the top. This raising of the sheet metal info this shape is by preference
effected by three successive stamping or raising operations in three separate pairs
of dies the first operation raising the blank to somewhere about the shape shewn
in elevation and in plan by Fig. 7, the next operation raising the blank into
somewhere about the shape shewn in sectional elevation and in plan by Fig. 8 and
the next operation bringing the body part A more nearly to the shape of the
required padlock case as shewn in sectional elevation and in plan by Fig. 9. The
said web or flange a' is then by suitable dies clipped off so as to leave the four
ears at a as a two on each side cheek as shewn in Fig. 10 projecting outwardly at
about right angles thereto. The lock case in this state is then forced through a
die which bends the ears a' a as a into the plane of their respective cheeks as
shewn in Fig. 5. The keyhole h and the hole in the other side of the case are
pierced by subsequent processes as will be well understood a bed or distance piece
being inserted in the padlock case whilst each of the said holes hand is being
pierced in.
In making padlock cases as above described I may use sheet brass sheet steel or
other suitable ductile sheet metal or alloy and it will be evident that without
departing from the nature of my invention I may slightly vary the shape of the
padlock casing.
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. Making padlock cases from sheet metal blanks in the manner substantially as
herein before described and illustrated by the accompanying drawing.
2. The combination with a padlock case made from sheet metal in the manner
herein before set forth and shewn, of a top plate such as B carrying the shut or
bolt and the tumbler or lever mechanism and fixed to the said case in the manner
substantially as hereinbefore described.
3. The combination with a padlock case made from sheet metal in the manner
hereinbefore set forth and shewn, of a top plate such as B carrying the shut or
bolt and the tumbler or lever mechanism and made with a back plate such as B¹
for the wards and fixed to the said case in the manner substantially as hereinbefore
described.
4. The combination in a padlock of a padlock case A made from a sheet metal
blank, the top plate B carrying the shut or bolt and the tumbler or lever
mechanism and fixed to the case A as set forth and either made with or without
the back plate B¹ for the warde, and a bow shackle such as E jointed between ears
on the top plate B and on the lock case A, the whole forming an improved padlock
substantially as hereinbefore set forth and shewn..
Dated this 17th day of February 1894.
'CHARLES BOSWORTH KETLEY,
Agent for the Applicant.