IMPROVEMENTS IN LOCKS OR FASTENINGS
Year: 1884

page_text: We, ROBERT CANNING JONES (trading as Jelley Son and Jones) wholesale
Ironmongers and JOHN WILLIAM CUNNINGHAM manager both of 196 Blackfriars
Road in the County of Surrey, do hereby declare the nature of our invention for
IMPROVEMENTS IN LOCKS OR FASTENINGS and in what manner the same is to
be performed, to be particularly described and ascertained in and by the following
statement—
"
Our invention relates to that class of locks or fastenings for railway carriage or
other doors in which a bolt or catch is used made in one piece with its follower-
and is an improvement on Letters Patent granted to Richard Samuel Charles
Jelley and Robert Canning Jones-trading as Jelley, Son and Jones-dated
10th September 1879, N° 953.
Our invention consists in dispensing with the arm or lever C in contact with
the edge b of the bolt or catch A and combined with the second arm or lever D
actuated behind by a flat curved spring E as described and illustrated in the
said Letters Patent and substituting therefor a spiral spring encased in the hinged
portion or body of the bolt or catch A as hereafter more particularly described.
On the accompanying drawing figure 1 represents a side elevation (partly broken
away) of our improved lock or fastening with cover plate removed and figure 2
a front view thereof like letters of reference indicating corresponding parts in
both figures.
A represents the bolt or catch made in one piece with its follower and hinged or
pivoted with its handle at a to the box B as shewn Encased by or recessed into
one side of that portion of the bolt or catch A surrounding its hinge or pivot a is
a spiral spring C one end of which is secured to the square (or other shaped) boss b
formed on the hinged portion of the bolt or catch A and its other end to a pin or
fulcrum c fixed to and across the box B above the bolt or catch A as shewn or
in any other suitable position.
The outer end of the bolt or catch A is formed with a bevilled lip or nose
piece & which when the bolt or catch A is turned upwards by the handle (or the
lock "unfastened") forces back and passes the bevilled outer edge e of a spring
catch D which is pivoted at its inner end to the upper part of the back of the
box B (figure 1) its outer end being pressed upon by a spring E (figure 2) which is
attached at its rear end to the cover plate f of the box B so that on the catch D
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page_text: being returned by the spring E to its normal position the bevilled lip or nose
piece d of the bolt or catch A is thereby caught and the latter held in the upward
or unlocked position the spiral spring C being at this time in a state of tension.
From the bevilled outer end of the spring catch D projects, over the face of
the box B, a flanged piece or lip g the side edge of which upon closing the door to
which the lock or fastening is attached strikes against the rebated edge of the
striking plate G (see dotted lines figure 1) and being thereby forced back with the
spring catch D releases the bolt or catch A which is then thrown over by the force
or recoil of the spiral spring C forwards and outwards on its hinge a so that its
bevilled lip or nose piece d enters the hasp or slot of the door frame and the door
is thereby automatically locked or fastened-By this means the handle of the bolt
or catch A remains in an upright position when the latter is held back by the
spring catch D or the door unfastened" and assumes a horizontal position when
the bolt or catch A is released by the spiral spring C or the door "fastened."
Besides the simplicity and durability of this Invention it has the advantages
that when applied to a railway carriage door the latter may be closed automatically
without the necessity of turning the handle, but simply swinging the door to
thereby saving time and trouble-Also when the bolt or catch has been released
and the door securely fastened it cannot become accidentally unfastened which is
often the case with the fastenings in present use and proves a fruitful source of
danger and annoyance.
Having now particularly described and ascertained the nature of our said
invention and in what manner the same is to be performed we declare that what
we claim is
The application and use to locks or fastenings of a bolt or catch made in one
piece with its follower in combination with a spiral spring and fulcrum pin and
with a spring catch projecting at its outer end over the face of the box substantially
as and for the purpose herein before described and illustrated by the accompanying
drawing.