Improvements in Locks for Doors, Gates, and for other similar Purposes.
Year: 1890

page_text: Date of Application, 14th July, 1890-Accepted, 13th Sept., 1890
COMPLETE SPECIFICATION.
Improvements in Locks for Doors, Gates, and for other similar
Purposes.
We, WILLIAM HENRY GREEN and JOHN GREEN, of The Speciality Lock Works,
Saint James Square Wolverhampton, in the County of Stafford, Engineers, 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 the manner in which we construct and arrange locks for
doors, gates, frames, and for other similar purposes whereby greater facility of opening
and closing, together with greater security, with less friction of moving parts is
obtained than is at present possible with the locks as ordinarily constructed.
Another part of our invention relates to the arrangement of the handle follower,
whereby a short movement of the handle causes a multiplied movement of the bolt
or catch.
In carrying our invention into effect we construct a mortise lock having its action
or movements arranged in the usual or ordinary manner, but the bolt we construct
with a peculiar shaped head for the purpose of giving greater freedom of movement
in either closing or opening and for obtaining the minimum amount of friction between
the sliding bolt and the frame or case of the lock.
Figure 1 of the accompanying drawings is a sectional elevation with the lock shewn
in skeleton form but having our improved form of bolt A shown more particularly,
togother with our improved action of the handle follower C and lever D. The face
or head of our bolt we form as a triangular shaped bar, having a rib B, or wing,
projecting either from the top or bottom of the bar, or from both as may be desired.
The tail of the bolt we construct as a plain bar E formed from, and continued out
of the head A.
The handle follower C we cause to operate against a lever D, carrying with it
in its movement the bolt A by means of the connection made at e, the tail E being
recessed to pass over the portion of the lever D similarly recessed.
The spring H we attach in any usual or well known manner; and the cam
shaped follower C, by pressing directly against the contact pieces d' on lever D gives
motion to the longer arm D of the lever attached or connected immediately with the
tail of the bolt. By this arrangement of the handle follower and lever, a long
movement of the bolt is obtained by a much shorter movement of the handle
itself.
We do not always construct our locks having our improved handle action together
with our improved form of bolt or catch, but employ our improved catch to suit any
kind of handle motion; also we employ our improved handle motion to suit any
ordinary kind of bolt or catch.
We construct double handed locks or locks for swing doors with our improved bolt
arranged with a diamond form of striking face A', having a rib B' at top and bottom
or from either alone, for efficiently holding the door when closed. The face of the bolt
being formed by cutting off the surface at each side of the square section of head
which we place upon its diagonals within the frame of the lock as shown in Fig. 5
and Fig. 6, the detail views of the bolt face.
Fig. 3 and Fig. 4 are detail views of the form of bolt we sometimes adopt
having no ribs, but simply the plain triangular section A' of head with inclined
face A³.
Fig. 7 and Fig. 8 are front and end elevations respectively of another modification
of our improved lock bolt having a triangular face with the inclined surfaces, but
provided also with wings or ribs B* B* for effectually engaging with the door

page_text: and thus preventing any accidental movement tending to release or unfasten the
door.
Having now particularly described and ascertained the nature of our said inven-
tion and in what manner the same is to be performed, we declare that what we
claim is :-
1st. The construction of locks having bolts formed with a triangular shaped head
or face such as A, and an inclined striking surface such as a¹, substantially as and
for the purposes herein described and illustrated in the accompanying drawings.
2nd. The construction of locks for use upon swing doors or for double handed
purposes having inclined surfaces such as A¹ and ribs such as B1 substantially as
herein described and as illustrated in the accompanying drawings.
3rd. The construction of locks having double inclined surfaces such as a¹ and tails
such as E substantially as and for the purposes herein described and as illustrated in
the accompanying drawings.
4th. The combination and arrangement of locks having a handle follower such as C
working directly on to a lever or crank such as D for manipulating the movements
of a bolt such as A substantially as and for the purposes herein described and as
illustrated in the accompanying drawings.
1000
U113
MARKS & CLERK,
13, Temple Street, Birmingham, Agents for Applicants.