Year: 1886

page_text: Date of Application, 26th Aug., 1886.
Complete Left, 26th May, 1887.
Complete Accepted, 28th June, 1887
RESERV
I FRANK HENSON of 36 Bridlesmith Gate, Nottingham, Nottinghamshire, Joiner
and Cabinet Maker do hereby declare the nature of this invention to be as follows :-
This invention relates to bolts for fastening folding or double doors, and it has for
its object the improvement of such bolts so as to render them automatic and to fasten.
and unfasten by closing or opening the second or outer door, by this means bolts
which are placed at the top of folding doors and out of reach can be fastened or
unfastened in a more speedy and convenient manner than heretofore.
In carrying out this invention the bolt is carried on a brass or suitable metal plate
provided with holes for attaching it to a door the upper end of this plate is turned at
right angles and has a hole in it for the upper end of the bolt to slide in, at or near
the lower end of the plate is screwed a bearing in which the lower end of the bolt
works the bolt is made preferably round and has working freely on it and resting on
the bottom bearing a metal sleeve provided with a projection or lever carried
through and working in a slot in the metal plate. The upper end of the boss is
bevelled in the form of a coarse screw thread and a second sleeve with its lower end,
coinciding with the upper end of the lower sleeve is securely fastened to the bolt. A
spiral spring is placed on the bolt between the upper sleeve and the turned portion of
the upper end of the plate to keep the two bevelled surfaces of the sleeves together.
By turning the lower sleeve by means of the projecting lever the action of the
bevelled surface forces the bolt outward, the spring returning the bolt to its normal
position again when the lever is released. The bolt is prevented from turning by
means of a pin in the upper boss working in a longitudinal slot in a plate at right
angles to and attached to the foundation plate, by squaring the end or in other
convenient manner.
The bolt is attached to the outer and upper corner of the first folding door the
metal plate and upper turned portion being let in flush with the edge and top of the
door respectively, the small lever alone projecting. By closing the second or outer
door the lever is turned by the edge of the door and the bolt shot into the seat
provided for it.
By making the bolts the reverso way they can be applied to the bottom corner of
the door and both bolts fastened or unfastened by closing or opening the outer door.
Dated this 26th day of August 1886.

page_text: 1, FRANK HENSON of 36 Bridlesmith Gate, Nottingham, Nottinghamshire, Joiner
and Cabinet Maker, do hereby declare the nature of this invention and in what
mannor the same is to be performed to be particularly described and ascertained in
and by the following statement :-
This invention relates to bolts for fastening folding or double doors, casements and
the like and it has for its object the improvements of such bolts so as to ronder them
automatic and to fasten and unfasten by closing or opening the outer door, by this
arrangement bolts which are placed at the top of folding doors and out of reach can
be fastoned or unfastened in a more convenient manner.
The invention will be best understood by reference to the accompanying drawings
in which Fig. 1 is a front elevation showing bolt in position and fig. 2 is a plan
thereof. Fig. 3 is a front elevation and fig. 4 a plan of a mortice bolt.
The bolt A is carried by a brass or suitable metal plate B provided with holes for
attaching it to a door, the upper end B' of the plate B is turned at right angles and
has a hole in it for the upper end of the bolt A to slide in; at or near the lower end
of the plate B is secured a bearing C in which the lower end of the bolt A works.
The bolt A is round and working freely thereon is a metal sleeve D provided with
a projection or lever E carried through and working in a slot in the plate B. The
bottom of the sleeve rests on the bearing C. The upper part of the sleeve D is
bevelled in the form of a coarse helix and a second sloevo F, the lower part of
which coincides with the upper part of the lower sleeve D, is securely fastened to the
bolt A. A spiral spring G is placed on the bolt A between the upper sleeve F and
the plate B to keep the bevelled surfaces of the slooves together.
The bolt A is prevented from turning by means of a pin H fixed in the sleeve F and
working in a slot I in a plate J attached to the plate B. This slot I is cut so as to
allow the bolt A to turn slightly when rising or falling.
By turning the lower sleeve D by means of the projecting lever E the action of its
bevelled surface forces the bolt upwards the spring Ġ returning it to its normal position
again when the lever E is released.
The bolt is attached to the outer and upper corner of the door K which opens
in the direction of the arrow the metal plate B and turned portion B' being let
in flush with the edge and top of the door respectively the small lever E alone
projecting. By closing the door K¹ the lever E with sleeve D is turned by the edge
of the door and the bolt A shot into the seat provided for it and held there.
By making bolts the reverse way they can be applied to the bottom of the door and
both bolts fastened or unfastened by closing or opening the door K³.

page_text: Having now particularly described and ascertained the nature of the said invention
and in what manner the same is to be performed, I declare that what I claim is :
1. The method of projecting or "shooting" a bolt by the impact or pressure of one
of a pair of swing or double doors upon a lever attached to a bevelled sleeve or cam
working loosely upon a bolt held in the other door, such bevelled sleeve or cam bearing
upon a similar bevelled sleeve or equivalent fixed to the said bolt in manner
substantially as specified.
2. The combination with a bolt such as A of bevelled sleeves, cams or equivalent D
and F for projecting or "shooting" the bolt and a spring such as G for withdrawing
the bolt substantially as specified.