IMPROVEMENTS IN LOCKS AND LATCHES
Year: 1885

page_text: FREDERICK BROWN of Stuart Street, Luton, Bedfordshire, Ironfounder, and
SAMUEL GUINERY of Albion Cottage, West Hill, Epsom, Surrey, House Decorator
do hereby declare the nature of our invention for IMPROVEMENTS IN LOCKS AND
LATCHES and in what manner the same is to be performed, to be particularly
described and ascertained in and by the following statement:-
The latch bolt a figure 1, when shot projects from the lock case in the usual
manner, it has a slot b dropping over a pin c which is fixed to the lock case and
upon which it slides horizontally to and fro and has a pin d fixed to or cast upon
it, an arm e pivoted near the back of the lock case has a slot f which drops over
the pin d and as the arm e falls of its own weight it presses against this pin and
shoots the latch bolt a and draws it back again when raised in the usual way by
the handle and follower g, the latch a when shot is locked by the bolt h which
has a slot m in front working on a pin n and which when raised behind and
thrown forward by the key drops the dependent piece i over the pin J when
the front of the bolt h engages the lip K of the arm e and effectually locks it and
it cannot be unlocked until the bolt h has been again raised and thrown back by
the key over the pin J, by which arrangements the use of springs is entirely
dispensed with ;-instead of the arm e figure 1 working from below the latch bolt a
the arm e figure 2 works from above and is pivoted in front of the lock case; and
locked by the bolt h in the same way as e figure 1, or the latch bolt may be
actuated by a toothed arm e figure 3 the tooth d working in a corresponding
groove on the top edge of the latch bolt a figure 3 which has a pin R long
enough to touch or nearly so the lock cover plate to keep the bolt a figure 3 in
position, the tail of the arm e shooting the latch bolt a by its weight and drawing
it back again when raised by the handle acting on a cam or an ordinary follower
in the usual way, the latch bolt a when shot being locked by the bolt h in the
manner before described, but we prefer the arrangement hereinbefore described
and illustrated by figure 1. The position of the pin d in the latch bolt a and the
slot f, in the arms e figures 1 and 2 may be reversed namely the slot f. may be
formed in the latch bolt a and the pin & fixed to or cast upon the arms e.
When
no latch is required a bolt a figure 4 working to and fro in the same way as the
bolt h figures 1. 2 and 3 is shot through the lock case and when shot is locked by
its dependent piece i engaging the pin J in the same manner as the bolt hi

page_text: figures 1, 2 and 3 and is unlocked in like manner by the reverse action of the key,
the bolt a can either be in one piece as shown figure 4 or in two parts jointed by a
pin p in one of the parts working in a hole in the other part as figure 5; The
arrangements herein before described and illustrated by figures 1. 2 and 3 are also
applicable to latches only by the omission of the bolt h.
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
1. The combination of the arm e and bolt a figure 1 substantially as described
and illustrated by the annexed drawings, also the modifications represented in
figures 2 and 3.
2. The locking bolt h figures 1.2 and 3 substantially as described and illustrated
by the annexed drawings.
3. The bolt a figures 4 and 5 as a lock of itself substantially as described and
illustrated by the annexed drawings.
4. For locks and latches combined the combination represented in figure 1 and
the modifications represented in figures 2 and 3 substantially as described and
illustrated by the annexed drawings.
5. For latches only the combination represented in figure 1 and the modifications
represented in figures 2 and 3 omitting the bolt h substantially as described and
illustrated by the annexed drawings.