Improved Means of Attachment between Cap or Back Plates and Sheet Metal Lock and Latch Cases.
Year: 1899

page_text: Improved Means of Attachment between Cap or Back Plates and
Sheet Metal Lock and Latch Cases.
I, DAVID BEARDS, of 13, Wood Street, Willenhall in the County of Stafford,
Lock and Latch Manufacturer, do hereby declare the nature of this invention to:
be as follows:-
-
This invention has for its object means of a very simple character for use in
attaching the cap or back plates of sheet metal lock or latch cases, according to
which the use of a screw for such purpose may be entirely avoided, and the incon-
venience and expense incidental to the use of a screw for such purpose be conse-
quently obviated.
According to this invention, the front end of the cap or back plate of a sheet
metal lock or latch case is formed with one, two, or more nibs or tenons, pre-
ferably with two of such, and a hole or holes to receive such nib or nibs, is, or are
pierced through the fore-end of the case. A nib or tenon, or two or more of
such, but preferably a single nib or tenon only, is formed, also, at the edge of the
back end of the case, and a hole is pierced through the cap or back plate to
receive such nib, or each nib. To attach a cap or back plate to a case, the nib
or tenon, or nibs or tenons, at its forward end is, or are, first passed into the
corresponding hole or holes through the fore-end of the case, and then the hinder
end of the plate is moved against the edge of the back end of the case, thereby,
bringing the nib or nibs of such back end through the corresponding hole or holes
of the plate, and then such last-mentioned nib or nibs is, or are, clenched back
against the outer face of the plate, which thus, becomes securely fixed in place.
Dated this 11th day of October 1899.
STEPHEN WATKINS & GROVES,
Wolverhampton, Agents for the Applicant.
Improved Means of Attachment between Cap or Back Plates and
Sheet Metal Lock and Latch Cases.
I. DAVID BEARDS, of 13, Wood Street. Willenhall in the County of Stafford,
Lock and Latch 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 means of a very simple character for use in
attaching the cap or back plates of sheet metal iock or latch cases, according to

page_text: which the use of a screw for such purpose may be entirely avoided, and the incon
venience and expense incidental to the use of a screw for such purpose be conse
quently obviated.
According to this invention the front end of the cap or back plate of a sheet
metal lock or latch case is formed with one, two, or more nibs or tenons, pre-
ferably with two of such, and a hole or holes to receive such nib, or nibs, is or are
pierced through the fore-end of the case. A nib or tongue or two or more of
such, but preferably a single nib or tongue only, is formed, also, at the edge of the
back end of the case, and a hole is pierced through the cap or back plate to
receive such nib, or each nib. To attach a cap or back plate to a case, the nib
or tenon, or nibs or tenons, at its forward end is, or, are, first passed into the
corresponding hole or holes through the fore-end of the case, and then the hinder
end of the plate is moved against the edge of the back end of the case, thereby
bringing the nib or nibs of such back end through the corresponding hole or holes
of the plate, and then such last-mentioned nib or nibs is, or are, clenched back
against the outer face of the plate, which thus becomes securely fixed in place.
The invention, in its preferred form, is illustrated by the drawings herewith,
of which Figure 1 is a detached elevation of the cap or back plate; Figure 2 is
a transverse section through the case looking towards the forward end thereof;
Figure is a corresponding view to Figure 2, but looking towards the back end
of the case; Figure 4 is a back elevation of the case with the cap or back plate
fixed in place; and Figure 5 is a section taken on line x x of Figure 4.
The cap or back plate A is formed with two nibs or tennons à a at its forward
end, and with a hole b, through its back end; and the case B has two holes ce
punched through its fore-end in such positions that the nibs a a of the cap or
back plate may be passed thereinto, and has a nib or tongue d formed to stand
out from the back end in position to pass through the hole 6 of the cap or back
plate as the plate is put in place. The cap plate is fixed in place by first passing
the nibs à into the holes ee: then moving in the back end of the plate so as
to bring the nib or tongue & through the hole b, and finally clenching back the
projecting portion of the tongue against the back face of the plate.
In the case of a dead lock, that is to say, a lock in which the fore-end of the
case does not project to come across the edge of a door, the cap or back plate may
be fixed by passing a nib, or nibs, thereof into a hole, or holes, in the back end
of the case, and passing a nib or tongue, or nibs or tongues, of the fore-end through
a hole, or, holes, in the front end of the plate, and clenching such tongue, or
tongues, back against the plate; and, in any case, in lieu of fixing the cap or
back plate at the front and back ends of the case, a nib or nibs of the plate may
be engaged with a hole or holes in the rim at one side, and a nib or tongue,
or nibs or tongues, of the rim at the other side be passed through a hole or holes
of the plate and clenched back thereagainst, but this modification is not recom-
mended, as is considered inferior to either of the modifications above described
in which the plate is fixed at the ends.
Having now particularly described and ascertained the nature of my said in-
vention, and in what manner the same is to be performed, I declare that what
I claim is:
1. The improved means of attachment between a cap or back plate and a sheet
metal lock or latch case which comprise means for detachably engaging the plate
with one end, or side of the case merely by a simple movement of the plate, a
nib or tongue, or nibs or tongues of the other end or side of the case and a hole
or holes in the corresponding end or side of the plate to receive such tongue
or tongues, the said tongue or each tongue being of a length which admits of it
being clenched back against the plate, substantially as set forth.
2. The improved means of attachment between a cap or back plate and a sheet
metal lock or latch case which comprise a nib or nibs formed on an end or side
of the plate, a hole or holes in an end or side of the case to receive such nib or

page_text: nibs a nib or tongue, or nibs or tongues, at the opposite end or side of the case,
and a hole or holes formed in the corresponding end or side of the cap or back
plate to receive the tongue or tongues which after being passed through the plate
may be clenched at the back thereof, substantially as described.
Dated this 10th day of July 1900
STEPHEN WATKINS & GROVES,
Chartered Patent Agents,
Wolverhampton, Agents for the Applicant.