Improvements in Catches or Fasteners for Doors and the like, Specially Applicable to Shop Doors.
Year: 1889

page_text: Date of Application, 20th Mar,, 1889
Complete Specification Left, 20th Dec., 1889-Accepted, 25th Jan., 1890
PROVISIONAL SPECIFICATION.
Improvements in Catches or Fasteners for Doors and the like,
Specially Applicable to Shop Doors.
I JOHN MARKS of 27 West Street Brighton in the County of Sussex Shop Fitter
do hereby declare the nature of this invention to be as follows :-
My said invention is designed to provide a simple cheap and efficient arrangement
of door catch or latch suitable either for single close shutting doors and the like or
for single or double swing doors and it is specially designed for shop doors.
According to my invention I arrange in the case of the lock mechanism a sliding
bolt carrying a bevelled or sloping catch having a subsidiary and smaller catch
below it and forming part thereof.
On the said sliding bolt I pivot a hooked catch or tumbler normally forced
upwards by a suitable spring.
Above the sliding bolt I pivot a bell crank lever the longer arm of which is
formed as a too or curved end to engage with the hooked or suitably formed catch
aforesaid mounted on the sliding bolt; on the shorter end or arm of the hell crank
lever I may mount an antifrictional roller and I arrange springs to act against the
sliding bolt and the short end of the bell crank lever.
A transversely sliding block carries an oppositely bevelled arm or surface to run
against the roller or short end or arm of the bell crank lover, which said sliding
block projects through each side of the lock casing.
This sliding block also carries adjustable screwed pins or spindles having eyes in
the heads thereof adapted to be bolted or screwed to rocking plates to which tho
door handles are connected such as by lugs or ears on the rocking plates in which
the bolts or screws passing through the eyes on heads of the spindles attached to
the sliding block work or engage.
The handles of the door are arranged vertically and are connected to the rocking
plates and become the means when pushed or pulled of transmitting motion to the
sliding block and so to the main bolt and the subsidiary locking catch.
It will be seen that when either handle is pushed or pulled the rocking plate is
slightly moved so forcing inwards the spindle attached to the sliding block, actuating
the bell crank working the hooked catch or tumbler and slightly withdrawing the
sliding or main bolt.
This action withdraws the lower or subsidiary locking catch from the mortico or
striking plate the main bevelled or sloping catch being forced back by the pull
against the striking plate as is usual in ordinary catches or bolts fitted to doors of
this class.
When the door is pushed to it is again locked by the re-engagement of the small
lower extention of the main catch with the mortise of the striking plate thus
preventing the door from being blown or forced open without the movement of one
of the handles.
Dated this 20th dor of March 1889
POPPLEWELL, COLTON & Co.,
Agents for the Applicant.

page_text: COMPLETE SPECIFICATION.
Improvements in Catches or Fasteners for Doors and the like,
Specially Applicable to Shop Doors.
I JOHN MARKS of 27 West Street Brighton in the County of Sussex Shop Fitter
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:
My said invention is designed to provide a simple cheap and efficient arrangement
of door catch or latch suitable either for single close shutting doors and the like or
for single or double swing doors and is specially designed for shop doors.
Referring to the accompanying drawings and to the Figures and letters of
reference marked thereon,
Figure 1 is a side elevation of my improved fastener with one of the side plates
of the box casing removed shewing the working parts.
Figure 2 is an end elevation of the same with the back of casing removed.
Figure 3 is a side elevation of a modification of my invention in which a halved
square spindle and follower are used.
Figure 4 is an elevation of a mode of actuating the fastenor shewn in Figure 3.
Figure 5 a section on line ab of the same, also shewing lock casing and split
spindle.
Figure 6 is a section on line a- of Figure 1 showing arrangement of rocking
plate.
In carrying ont my invention I arrange in the case of the lock A a sliding bolt B
carrying a bevelled or sloping catch having a subsidiary and smaller catch D
below it and forming part thereof.
On the said sliding bolt B I pivot at e a hooked catch or tumbler E normally
forced upwards by a spring F.
Above the sliding bolt I pivot at g a bell crank lever G the longer arm of which
is formed as a toe or curved end H to engage with the hooked or suitably formed
catch E aforesaid mounted on the sliding bolt B; on the shorter arm of the bell
crank lever I may mount an antifrictional roller I and I arrange springs J J to act
against the sliding bolt B and the short end of the bell crank levor G.
A transversely sliding block K carries an oppositely bevelled arm or surface L to
run against the antifrictional roller 1 said sliding block K projects through each
side of the casing A and carries adjustable screwed pins or spindles M (Figure 2)
having eyes N in the head thereof adapted to be bolted or screwed or connected to
the rocking plates O such as by lugs as shewn in Figure 6.
The handles of the door are arranged vertically and are connected to the rocking
plates and become the means when pushed or pulled of transmitting motion
to the sliding block K and so to the main bolt B and the subsidiary locking
catch C.
It will be seen that when either handle is pushed or pulled the rocking plate O
is slightly moved so forcing inwards the spindle M attached the sliding block K
actuating the bell crank & working the hooked catch or tumbler E and slightly
withdrawing the sliding or main bolt B.
This action withdraws the lower or subsidiary locking catch D from the mortice
or striking plate, the main bevelled or sloping catch being forced back by the
pull against the striking plate as is usual in ordinary catches or bolts fitted to doors
of this class.
When the door is pushed too it is again locked by the reengagement of the
subsidiary catch D with the mortice or striking plate thus preventing the door from
being blown or forced open without the movement of one of the handles.
In a modification of my invention shewn in Figures 3, 4 and 5 I dispense with
the sliding block K and bell crank lever G and fix in its place an arm or lever P
fitted to an ordinary follower Q into which a split and square spindle R (Figure 4)

page_text: is placed said spindle having at each of its ends a pivot R' on which may be mounted
an antifrictional roller S. This square and split spindle is mounted to turn loosley
in a plate T and on the rocking plate O (Figures 4 and 5) is fixed an oppositely
bevelled plate or tongue U. When the rocking plate O is pushed the spindle R is
turned slightly by means of the plate U so pushing back the arm or lever P and
thus releasing the door or the like. If found desirable 1 mawfix a vertical handle
to one side of this arrangement and an ordinary bent lever with knob at the other
with a straight spindle halved to engage with the halved end of the opposite
spindle.
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 a latch of fastener for swing doors and the like a subsidiary catch or
bolt such as D as and for the purpose herein described.
Second: In latches or fasteners for swing doors or the like a transversely sliding
block such as K having an oppositely bevelled arm such as L as and for the purposes
herein described.
Third: The general arrangement and combination of parts constituting latches or
fasteners for swing doors or the like substantially as herein described and illustrated
in the accompanying drawings.
GALL 3
1000
Dated this 20th day of December 1989.
POPPLEWELL & Co.,
17 & 18, Southampton Buildings, London, W.C., Agents for the Applicant.