Improvements in the Manufacture of Bands or Keeps for Door Latches.
Year: 1895

page_text: Date of Application, 22nd May, 1895-Accepted, 22nd June, 1895
COMPLETE SPECIFICATION.
Improvements in the Manufacture of Bands or Keeps for Door
Latches.
I, GEORGE WILEY, of Eagle Works, Darlaston, in the County of Stafford,
Bolt and Nut 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 :-
66
""
This invention consists of the hereindescribed improvements in the manufacture
of bands or keeps for door latches of the kinds known as "Norfolk " Suffolk
"Gothic" and other latches in which the latch proper is made to lift as a lever and
is not provided with a latch casing but is jointed at one end to a plate fixed to the
door and is guided in its up and down movement by one of the bands or keeps
berein referred to.
The said bands or keeps when made in accordance with my invention can be
produced very cheaply and are stronger and have a neater appearance and finish
than have those made in the usual way.
I will describe my invention by referring to the accompanying drawings on
which
Fig. is a front view, Fig. 2 is a back and side view of one of the said bands
or keeps made in accordance with this invention;
Fig. 3 shews one of the stages in the formation of the front part of the band or
keep; Fig. 4 shews the next stage of the same;
Fig. 5 shews the front and back parts of the band or keep placed in position
ready to be closed together as shewn in Figs. 1 and 2 and by the tools illustrated
by Fig. 6;
Fig. 7 shews a slightly modified form of my invention; Fig. 8 shews the front
part of this modified form separately and Fig. 9 shews the front and back parts of
the same in position ready to be closed together as shewn in Fig. 7.
The same letters of reference indicate the same or corresponding parts in all the
figs. of the drawings.
According to one method of carrying out my invention (see Figs. 1 to 6 both
inclusive) I make the band or keep of two strips or blanks of sheet metal forming
respectively the front part A and the back part B of which the front A. is made
somewhat longer than the back part B so as to bend over the ends of the latter and
be fixed thereto as hereinafter described. The front part A is in the first process
bent outwardly at a' so as to form the loop or slot in which the latch works, the
blank will then have the appearance represented by Fig. 3.
In the next process
the ends a² as of the blank are bent forward somewhat so as to take the back part B
between them and have the appearance represented by Fig. 4. The back part B
is then placed in position against the back of the front part A and within the
turned up ends a² a³ as shewn in Fig. 5; and then by means of the pair of top and
bottom tools CD such as shewn by Fig. 6 the ends a a³ of the front part A are
closed down upon the ends of the back part B thus firmly securing the two parts A
and B together. The bottom tool D is made of a shape to fit the front A and is
also made with two cross grooves d' d corresponding with the ends of the band or
keep and the top tool C is made perfectly flat underneath so that when the front
part A and back part B are placed in position on the bottom tool D as aforesaid
and the top tool C descends the end portions a² a³ of the front part A are by
D

page_text: the top tool C being flat underneath forced into these grooves d' d³ this forming
a bead a³ at the top and bottom of the band or keep as shewn in Figs. 1 and 2 and
also slightly bending the extremities of the back part B and securely fastening the
same to the front part A..
Instead of the front part A being made longer than the back part B and the
ends of the front part A being closed over the ends of the back part B, this
arrangement may be reversed, that is to say, the back part B may be made longer
than the front part A and its ends closed over the ends of the front part A. This
modification of my invention is illustrated by Figs. 7, 8 and 9 where it will be seen
that the back part B is made longer than the front part A and the ends 16 of the
back part B are bent and closed, over the ends of the front part A so as to be
effectually secured thereto, and form a bead at the ends of the front of the same
and have very much, the same appearance as in the arrangement of my invention
first above described and illustrated by Figs. 1 and 2.
The projecting part a¹ of the front part A where the latch works is by
preference raised with an oblong pommel 'a so 'as to strengthen the same, but
it is to be understood that I make no claim to the strengthening of the part a¹ by
the pommel a as I am well aware that the front parts of the bands or keeps of
other latches are strengthened in the same way.
32.
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 a band or keep for a door latch of two sheet metal strips or blanks
forming respectively the front part and the back part of the band or keep, the said
two parts being secured together by the ends of the front part being closed over
the ends of the back part in the manner and substantially as hereinbefore described
with reference to Figs. 1 to 6 both inclusive of the accompanying drawings.
18.
2. Making a band or keep for a door latch of two sheet metal strips or blanks
forming respectively the front part and the back part of the band or keep, the said
two parts being secured together by the ends of the back part being closed over the
"ends of the front part in the 'manner and substantially as hereinbefore described
with reference to Figs. 7, 8 and 9 of the accompanying drawings.
3. Bands or keeps for door latches made in either of the ways substantially
"hereinbefore described and illustrated by the accompanying drawings.
Dated this 20th day of May 1895.
as
CHARLES BOSWORTH KETLEY,
Agent for the 'Applicant.