IMPROVEMENTS IN LOCKS FOR RAILWAY AND OTHER CARRIAGE DOORS, AND OTHER ANALAGOUS PURPOSES
Year: 1884

page_text: PROVISIONAL SPECIFICATION.
I WILLIAM HENRY SAINT AUBIN of Bloxwich, in the County of Stafford,
Mechanician and Patent Agent do hereby declare the nature of said Invention
for "IMPROVEMENTS IN LOCKS FOR RAILWAY AND OTHER CARRIAGE DOORS, AND
OTHER ANALAGOUS PURPOSES to be as follows:-
My improvements consist chiefly in the construction of locks without main
springs for the aforesaid purposes, which I anticipate will supply a long felt want,
inasmuch as the best of springs are constanly breaking, and the lives of passengers
are constantly in danger.
The following brief explanation, together with the annexed Drawings and letters
of reference thereto, will make my Invention sufficiently understood without need
for further comment herein.
.A. Fig. 1, is the bolt, having an axis, B, on either side which work in holes in
the case and cover plate of the lock. C. is an eccentric having also an axis, D, on
either side which work in holes in the case and cover plate of the lock. E, is a
square hole for the reception of the spindle of an ordinary handle. F, is an arm,
forked at each end, and hinged or geared to the eccentric, C, and bolt, A, by means
of screws or pins, G. G. passing through them. H, is a small hole in the bolt
for the reception of a spiral spring acting upon a stud having either a round or
conical head, which is pressed or forced into a corresponding hole in the cover
plate of the lock, when the bolt is locked and unlocked, and which secures the same
from getting displaced by any shock or jar.. The dotted lines shew the bolt locked
out, from which it will be seen that by virtue of the centre, G, in the lower end of
the arm, F, being over the centre of the axis, D, it is impossible to lift the bolt
without turning the eccentric, C, by means of the handle, thus I accomplish that
which cannot be attained in any lock having a main spring, how ever strong it
may be.
'
I do not however strictly confine myself to the exact details herein described, as
the same may possibly be open to some slight modification.
What I claim as my Invention is the construction of locks without main
springs, "for railway and other carriage doors, and other analagous purposes," as
herein described.
Dated this 2nd day of February 1884.

page_text: I, WILLIAM HENRY SAINT AUBIN of Bloxwich in the County of Stafford,
Mechanician and Patent Agent do hereby declare the nature of my Invention for
"IMPROVEMENTS IN LOCKS FOR RAILWAY AND OTHER CARRIAGE DOORS, AND
OTHER ANALAGOUS PURPOSES and in what manner the same is to be performed, to
be particularly described and ascertained in and by the following statement:—
My improvements consist chiefly in the construction of locks without a main
spring for the aforesaid purposes, which I anticipate will supply a long felt want,
inasmuch as the best of springs are constantly breaking and the lives of passengers
are constantly in danger.
In constructing a lock as above mentioned, I first employ a bolt, A, Fig. 1.
turning outward in a circular direction upon an axis, B, on either side, which fit
into and work in corresponding holes in the cap and case of the lock. Second I
employ an eccentric, C, the axis, D, of which on either side also fit into and work
in corresponding holes in the cap and case of the lock immediately below the bolt,
and through which I form a square hole, E, for the reception of the spindle of an
ordinary handle, such as is used on all railway carriage doors. The motion of
the handle axis E must be limited to a right angle by stops not shewn in the
Drawing.
•
I next employ an arm, F, forked at each end, which I hinge or gear eccentrically
to the bolt and the eccentric, by means of pins or screws, G, G, passing through
them as shewn in Fig. 1 of the Drawings accompanying my Provisional
Specification.
In order to retain the bolt in position when unlocked, I preferably insert a small
spiral spring in the back of the arm, F, instead of in the bolt as shewn at, H, in
the aforesaid Drawings, such spiral spring acting upon a stud, which is pressed or
forced against the rim of the lock case which is parallel with the fore-plate
through which the bolt turns, and which stud in addition to retaining the bolt in
the aforesaid position, also forces the bolt through the fore-plate of the lock so soon
as the handle is partially turned, and in like manner withdraws the bolt when the
operation of unlocking is partially performed.
The dotted lines shew the bolt locked out from which it will be seen that by
virtue of the centre, G, in the lower end of the arm, F, being over the centre of
the axis, D, it is impossible to lift the bolt without turning the eccentric, C, by
means of the handle, thus I accomplish that which cannot be attained in any lock
baving a main spring.
Having now particularly described and ascertained the nature of my
Invention and in what manner the same is to be performed, I declare that what
I claim is
1-The improved construction of locks without main springs, as shewn in
Drawings accompanying my Provisional Specification.
2-The improved locking devices, substantially described and illustrated by the
aforesaid Drawings.
Dated th: 01st L 1001