Improvement in Locks and Bolts.
Year: 1887

page_text: Date of Application, 24th Mar., 1887
Complete Left, 27th Dec., 1887
Complete Accepted, 27th Jan., 1888
PROVISIONAL SPECIFICATION.
Improvement in Locks and Bolts.
I THOMAS LATHAM of 13 Alpha Street, Choumert Road, Peckham County of
Surrey, Grocer, do hereby declare the nature of my said invention to be as
follows:-
According to this invention the bolt is made in preferably two longitudinal parts
which slide between bow springs in suitable sheath. The extremity of the locking part
is made with side flange which when the bolt is fastened, expand into a recess or
behind a projection and so lock the bolt to prevent its being pushed back. Additional
lateral projections may be formed on divisions of bolt which extend outside mouth of
sheath when the bolt is expanded.
The expansion of the bolt is effected by incans of preferably, two wedges connected
together by connecting rod, acting between the divisions of the bolt, actuated by the
handle which works the bolt which is attached to the connecting rod. The inner sides
of divisions of bolt are made with suitable grooves for the wedges to travel in, which
assist in keeping the divivisions together and guiding them. Overhanging lip guides
may be attached to the divisions to further assist their moving together.
When applying the invention to the bolts of locks, the wedges are operated by
the key.
FREDERIC PRINCE,
1, Quality Court, Chancery Lane, W.C
Agent for Applicant.

page_text: I THOMAS LATHAM of 13 Alpha Street, Choumert Road, Peckham County of
Surrey, Grocer, 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 :-
This invention relates to an improved means for automatically locking the bolts of
bolts and locks, which I will proceed to fully describe with aid of the accompanying
drawings, which show the invention as applied to a bolt.
DESCRIPTION OF THE DRAWINGS.
Figure 1 outside plan of bolt.
Figures and 3 plan and partial sectional plan respectively with top of sheath
removed.
Figure 4 partial plan view of underside of top of sheath.
e,
The sliding bolt is formed of two divisions or parts a, b, carried in sheath c ;
d, how springs to hold divisions a, b, together; e rod between the divisions a, b, having
at each end double wedges e, e, to expand divisions a, b. The rod is operated
by a pin g, coming outside sheath c, working in slot c. The pin g may be fitted with
a handle. On top of divisions a, b, are formed studs a, b, which work in grooves c²
in underside of top c¹ of sheath c: the grooves have side extensions to allow for the
expansion of the bolt: similar studs and grooves are arranged under divisions
(8, b.
These studs and grooves hold the divisions a, b, together to enable the wedges, e¹, e², to
push out the bolt, and when the studs come to the top of the grooves, hold the
divisions to enable the wedges e¹, e², to expand the bolt as shown at figure 3, thereby
locking the bolt by the shoulders a³ and a the latter projecting over the outside of end
of sheath c, and the former behind a recess f, formed in f, and the studs a¹ and 6' in
side of grooves ². The divisions a, b have side lips 3 to further assist in keeping the
parts together at exit end. The wedges e, e, are prevented from being pushed too far
by a cross pin e³, in rod e, working in slots a² 62, in divisions b. On drawing back
the wedges from the position shown at figure 3, the springs d press the divisions a, b,
together thus unlocking bolt, and admit of it being drawn back by the cross pin e³
When applying the invention to a lock, the rod e, is operated by the key for which
purpose it should be suitably arranged to engage the wards of the key.
a,
Having now particularly described and ascertained the nature of this Invention
and in what manner the same is to be performed, I declare that what I claim is:
Constructing the bolt of a lock or bolt in parts which are automatically expanded
by shooting the bolt, such expansion locking the bolt to prevent its being pushed
back, substantially as hereinbefore described, and represented in the accompanying
drawings.
T11:07h
Darshan 1007