AN IMPROVED BOLT FASTENING FOR DOORS, WINDOWS & THE LIKE
Year: 1884

page_text: I EDWARD JOHN LINES of 103 Hammersmith Road in the County of Middlesex
Architect, do hereby declare the nature of the said invention for "AN IMPROVED
BOLT FASTENING FOR DOORS, WINDOWS & THE LIKE" to be as follows:-
This invention is designed to produce a bolt suitable for house doors, cupboard
doors, window sashes, and a variety of other purposes which shall not depend for
its strength upon a few screws as in the form at present commonly used.
Within a suitable tube I place a helical spring and the bolt; this is sunk into
the frame of the door or other suitable place. A corresponding hole is bored in
the door and when the door is closed and the bolt released it springs into the hole
(which may be also lined with a metal tube) in the door thus securing the door
and being itself located within the solid portion thereof instead of as at present
merely attached by screws. A projection from the bolt having a knob serves to
move the bolt and a slot is provided for the passage of this projection a recess or
check preventing the bolt from flying out when it is withdrawn.
This spring arrangement is also applicable to bolts of the ordinary description.

page_text: COMPLETE
SPECIFICATION.
I EDWARD JOHN LINES, 103 Hammersmith Road the County of Middlesex
Architect do hereby declare the nature of my invention for "AN IMPROVED
BOLT FASTENING FOR DOORS WINDOWS AND THE LIKE" and in what manner the
same is to be performed, to be particularly described and ascertained in and by the
following statement:―
This invention is designed to produce a bolt suitable for house doors, cupboard
doors, window sashes and a variety of other purposes which shall not depend for its
strength upon a few screws as in the form at present commonly used.
Within a suitable tube I place a helical spring and the bolt; this is sunk into
the frame of the door or other suitable place A corresponding hole is bored in
the door and when the door is closed and the bolt released it springs into the hole
(which may be also lined with a metal tube) in the door thus securing the door
and being itself located within the solid portion thereof instead of as at present
merely attached by screws. A projection from the bolt having a knob serves to
move the bolt and a slot is provided for the passage of this projection a recess or
check preventing the bolt from flying out when it is withdrawn.
This spring arrangement is also applicable to bolts of the ordinary description.
In the accompanying Drawings Figure 1 is an elevation of the apparatus the
woodwork being cut away to expose it. Figure 2 shows the door and frame in full
and the bolt & dotted in and the knob coming through.
Figure 3 is an end view of the bolt casing &.
A represents one part of the door framing sash or whatever the bolt may be
applied to and B the other part. C is a tube preferably of metal and D is the bolt.
E is a spring tending to force the bolt outwards and F is a socket or simple bole
which the bolt enters when shot forward. This socket F is preferably so formed
that in end elevation the vertical axis is longer than the horizontal axis so, as to
allow for the dropping of the door. G is the knob attached to or forming part of
the rod H which is fastened to the bolt preferably screwed into it. I is an angle
slot in one arm of which the bolt slides the other serving to fix it back.
When the door & is open or the bolt is not required to be used the rod H is placed
in the arm 1' of the slot I and this holds the bolt back; when the bolt is required
the knob G and its rod H are turned so as to clear I and the spring E immediately
forces out the bolt.
It will be readily seen that as this bolt is sunk into the solid wood or material of
the door sash or equivalent its holding power does not depend upon a few screws as
is the case with the bolts in ordinary use.
Having now particularly described and ascertained the nature of my said
invention and in what manner the same is to be performed I wish it to be

page_text: understood that I am aware that bolts have been used in mortice locks inserted in
the woodwork but that I believe a mortice bolt such as described to be novel and
I therefore claim
A spring controlled mortice bolt D carried in a tube C and operated by a rod H
working in a slot I in the door or equivalent in which the bolt is fixed substantially
as specified.