An Improvement in Mortice Locks.
Year: 1891

page_text: Date of Application, 8th Oct., 1891
Complete Specification Left, 31st Oct., 1891-Accepted, 16th Jan., 1892
PROVISIONAL SPECIFICATION.
An Improvement in Mortice Locks.
WILLIAM DOUSLIN, 13 Honoria Street, Huddersfield, in the County of
York, Architect, do hereby declare the nature of this invention to be as
follows:-
An improvement in mortice locks, whereby adopting such improvement a lock
may be brought into a smaller compass, also for the simple & easy working of the
lock. My improvement consists in a neck grip which is fixed on the top of the
spiral spring and attached to the spring bolt for working it backwards and forwards.
And also for an improvement in spiral spring, the bottom of the spring to be turned
at right angles with the barrel & fixed through a hole in the stud which will prevent
the spiral spring from slipping.
Dated this Seventh day of October 1891.
COMPLETE SPECIFICATION.
An Improvement in Mortice Looks.
WILLIAM DOUBLIN of 13 Honoria Street, Huddersfield, in the County of
York Architect, 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:-
The drawings show the lock full size also the improvements in it, whereby by
adopting my method a lock can be constructed in a smaller compass than that
generally observed, combined with efficiency. My improvements consist in the
neck grip, which is fixed over the top of the spiral spring close to the side of the
case and practically only occupying the same space as has been generally occupied
by the spiral spring.
The neck grip is attached to the neck of the spring bolt by two studs which are
shown on plans and sections.
Sheet I. Fig. 1 is a plan of the lock, showing the parts intended to be patented.
A on the plan is the neck of the spring bolt and d d are two holes or depressions
by which the grip is secured to the spring bolt for the purpose of working the
spring bolt backwards and forwards. D is the tail end of the grip, passing round
the follower for pulling the spring bolt back. E is the spiral spring and F is the
circular portion of the spring bolt showing the spiral spring rolled round and the
point is the end of the spiral spring turned at right angles and resting against
the stud or socket H, thus preventing the bottom of the spring from slipping
through the socket. The bolt F works backwards and forwards in the socket H.
By removing the screw L the outer portion of the spring bolt K is disengaged, so
that it can be drawn out, reversed, placed in position again and the screw
refixed, thus reversing the bolt therefore the lock will answer for a right or
left hand lock. M is the locking bolt and the spring bolt K works in the
centre.
Sheet I. Fig. 2 is a plan of the grip which when in position is over the top of
the spiral spring one end passing round the follower h; the tail part of the grip is
shown in position D. The neck end of the grip has studs on the underside, which
drop into the holes at d, thus forming the connection between the spring bolt and
the follower so that the grip works the spring bolt backwards and forwards,
[Price 6d.】

page_text: Sheet I. Fig. 3 shows a longitudinal section of the grip. Y on the plan shows
the studs which fit into the holes at d.
Sheet I. Fig. 4 is a section of the end of the grip at X and shows the studs,
which fit into the spring bolt at d.
Having now particularly described and ascertained the nature of my said 5
invention and what manner the same is to be performed, I declare that what
I claim is: :-
Firstly That the method, construction and application of the neck grip for
pulling back the spring bolt is original.
Secondly:-The end of spiral spring returning at right angles at against the
stud or socket H thereby preventing the possibility of the spring slipping through
the socket and disarranging the spring.
Dated this 29th day of October 1891.
WILLIAM DOUSLIN.