Improvements in the Construction of Rim Locks and Latches.
Year: 1897

page_text: PROVISIONAL SPECIFICATION.
Improvements in the Construction of Rim Locks and Latches.
I, GEORGE HARRY BURROWS, of Wood Street, Willenhall, in the County of Stafford,
Lock Manufacturer, do hereby declare the nature of this invention to be as
follows:-
In the construction of this improved lock or latch, the parts called or known as
the rims are constructed in the following manner. The plate iron out of which the
case is made is of sufficient width to form the front of the case and the top and
bottom sides called or known as the rims, which said rims are turned up at right
angles to the front of the case and by this method of manufacture would then be in
one piece with the lock or latch case instead of being a seperate piece of iron requiring
to be fitted and rivited to the case. To strengthen the parts of the case that are
thus turned up to form the rims, stronger pieces of iron are rivited thereto, either to
project over the turned up edge of the case forming the said rims or the said stronger
pieces of iron may be placed by the side of the said rims and rivited thereto.
Dated this 1st day of September 1897.
COMPLETE SPECIFICATION.
Improvements in the Construction of Rim Locks and Latches.
I, GEORGE HARRY BURROWS, of Wood Street, 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 :—
In the construction of this improved lock or latch, the parts called or known as
the rims are constructed in the following manner. The plate iron out of which the
case is made is of sufficient width to form the front of the case and the top and
bottom sides called or known as the rims, which said rims are turned up at right
angles to the front of the case and by this method of manufacture would then be in
one piece with the lock or latch case instead of being a seperate piece of iron requiring
to be fitted and rivited to the case. To strengthen the parts of the case that are
thus turned up to form the rims, stronger pieces of iron are rivited thereto, either to
project over the turned up edge of the case forming the said rims, or the said stronger
pieces of iron may be placed by the side of the said rims and rivited thereto.
In describing this invention in conjunction with the accompanying sheet of
drawings the same letters of reference occuring on different figures indicate corres-
ponding parts.

page_text: Fig. 1 is a plan of the case showing the shape of the piece of plate iron of which
the case is formed. A being the front, A¹ and A³ the rims, A2 the back end and A*
the fore end, showing the bolt and shut holes C and B cut through.
The said parts A1, A2, A3 and A+ are turned on the dotted lines Fig. 1 at right
angles to the front A and so form the case as shown by Fig. 2.
Fig. 3 is a section through the piece of metal that is rivited to the said parts of the
case called the rims as marked A¹ and A3 in Figs. 1 and 2 and the said piece of metal is
also shown on Fig. 4 and marked D where it will be observed that the said part D
wraps over or covers the turned up edge of the part marked A¹.
Fig. 5 is an enlarged section through the piece of metal marked F Fig. 4 showing
how the said rims can be strengthened by this invention, by only placing the piece
of metal F by the side of the rim A³ but not to wrap over or cover the edge as shown
by 1) Fig. 4.
The parts thus described are then secured together with rivits as shown by E
Fig. 4.
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
The construction of a rim lock or latch case wherein the rims are strengthened by
pieces of metal being rivited thereto, substantially the same as shown and described
in this Specification and the accompanying sheet of drawings.
Dated this 2nd day of July 1898.
GEORGE HARRY BURROWS.