Improvements in Lifting and other Latches.
Year: 1889

page_text: Date of Application, 29th Aug., 1889-Accepted, 5th Oct., 1889
Improvements in Lifting and other Latches.
I, THOMAS HENRY BRINDLEY of The Retreat Lock Works Retreat street Wolver-
hampton in the County of Stafford Lock Manufacturer do hereby declare the nature
of my said invention and in what manner the same is to be performed to be particularly
described and ascertained in and by the following statement:-
My invention has for its object improvements in lifting & other latches, by which
lifting latches can be much more readily, and easily manipulated and locked from the
inside while at the same time they are of considerably improved appearance which
causes them to be particularly applicable for gothic latches, used on church and pew
doors although at the same time they may be used with equal facility on any other
class of door.
In order that my invention may be clearly understood and more easily carried
into practice I have appended hereunto, a double sized sheet of drawings upon which
I have illustrated one of my latches as well as shewn the application of my improve-
ment to the ordinary mortice rim, or other class of latches.
Figure 1. is a broken off elevation of part of the inside of the door A with one of
my latches, attached thereto.
Figure 2. is a similar elevation of the outside of the door.
Figure 3. is a sectional elevation on the line 1-2.
Figure 4 is a side elevation of the supporting and locking socket D.
Figure 5 is a side elevation of the catch E.
Figure 6 is a diagram section through a lock shewing the application of my
improvement thereto.
In place of raising the latch B by means of the old fashion thumb lever I provide,
the wedge shaped bolt F which is made to slide in the supports H and K which are
in turn secured to the door A by means of the screws and k¹ the inside end of
the bolt F is provided with the "pull" the outside being provided with the
"push" and between the head of this "push" and the plate, H the coiled
spring L is placed so as to keep the wedge F in the position shewn with the latch B
down. It will therefore readily be seen that it is simply necessary to pull the cap fl
or push the cap ft o cause the incline of the wedge F to force up the latch B.the
same movement of the hand at the same time opening the door. So as to have a
proper command of the door while pushing up the latch the finger grip H' is provided
and attached to the plate H. In the case of the socket D supporting the latch the
slot d' is provided in which the loose rivit d' slides so that when in the position shewn
the latch B is locked down but allows of the latch being raised, when the rivit d'
is raised up so as to rest in the well at d³ and this arrangement may be equally
applied to other parts of the latch.
For the purpose of assisting the disengaging of the latch B from the catch E I
provide upon the side of the catch the small wheel el which may however be either
in the centre of the catch as shewn by dotted lines e³ or on the other side, or both,
as may be preferred, and in using this I prefer to round the edge e³ of the catch
off a little.
"
The application of my wedge device to mortice rim and other latches will be
readily seen on reference to Figure 6 in which the wedge M is made by the "push"
and "pull" motion previously explained to withdraw the bolt N of the latch from its
socket, in this case the spring P or other suitable arrangement being provided to
return it to the normal condition.
It will readily be seen that one side of the latch may be used without the other i.e.
the "push" and "null" arrangement may each be used without the other.
"

page_text: 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
"
First. In improvements in lifting latches, the "push and "pull" wedge F for
lifting the latch substantially as herein set forth and shewn upon the drawings.
Second. The improvements in latches the "push" and "pull" wedge arrange-
ment M for acting upon latch bolts substantially as herein set forth and shewn upon
the drawings.
Third. In improvements in latches, the locking arrangement in the socket D
substantially as herein set forth and shewn.
Fourth. In improvements in latches the anti-friction wheel e' substantially as herein
set forth and shewn.
Dated this 28th day of August 1889
GEORGE BARKER,
77, Colmore Row, Birmingham, Agent for Applicant.