An Improved Sliding Flush Bolt.
Year: 1889

page_text: Date of Application, 2nd Feb.,
1889
Complete Specification Left, 29th Oct., 1889-Accepted, 30.h Nov., 1859
PROVISIONAL SPECIFICATION.
An Improved Sliding Flush Bolt.
I, CHARLES FREDERICK HALL 2 Crogsland Road Chalk Farm London N.W.
(Storekeeper) do hereby declare the nature of my sail invention to be as follows:
The object of my invention is to produce a sliding flush bolt which shall be provided
with an apparatus by means of which the rod of the bolt can be raised or lowered
without injury to the fingers and be made self-locking so that it cannot be pushed
back from the outside.
The main feature of my invention consists in a fingerhold centred on the rod of
the bolt which can be made either to stand upright flush with the front of the holt-
(see A Figs. 1 and 2 on the drawings accompanying this provisional specification) by
means of a counterpoise shown at B-or to fall by its own weight as C. Two of
those fingerholds to be used on each bolt. By shifting the counterpoise from one
fingerholl to the other the same bolt can be made to serve both for a top and bottom
bolt. But the bolts may be made in pairs that is to say unreversible with the
fingerhold and counterpoise in one so that the bolt will only serve for either a
top or bottom bolt.
Fig. I shows a bottom bolt in its normal position unacted upon by the fingers with both
fingerholds flush with the front of the bolt. If it is desired to push out the rod of the
bolt the finger is inserted at D the fingerhold lowered at right angles with the surface
of the bolt and a firm handle or fingerhold is thus obtained by which the rod can be
conveniently pushed out. Directly the fingerhold is releasol it is brought back flush
with the front of bolt by the counterpoise. To push the rod back into the normal position
the other fingerhold is used in a similar way.
A tooth or peg is attached to the frame of the bolt-see E--over which the finger-
hold slides & hooks itself on by its own weight so that the rod of the bolt cannot be
moved until the fingerhold is lifted over it.
The counterpoise may be removable and attached in any way most suitable for the
purpose or it may form part of the fingerhold itself.
The drawings accompanying this specification do not show the exact form my
apparatus may take & I may alter modify or re-arrange the various sizes & proportions
of the different parts.
The bolts may be made in any material.
COMPLETE SPECIFICATION.
An Improved Sliding Flush Bolt.
1, CHARLES FREDERICK HALL 2 Crogsland Road Chalk Farm London 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 :-
The object of my invention is to improve on the ordinary sliding flush bolt.
The main feature of my invention consists in a pair of fingerholds by means of
which firm & decided handles or grips are provided to move the rod in & out. Two
fingerholds being necessary as it has been found that with only one fingerhold the
rod can be moved but one way if the rod sticks at all. The fingerholds are centred
on the rod of the bolt & in their normal condition are hoth flush with the front of the
bolt (see Fig. 1 on the drawings left with the provisional specification). One of the
fingerholds is brought flush by the counterpoise B the other by its own weight. The
counterpoise is interchangable and is fitted to both fingerholds. That is to say the
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page_text: fingerhold C can be made by means of the counterpoise to stand upright like the
fingerhold A for they are both made exactly alike for the reception of the
counterpoise or the counterpoise may form part of one of the fingerholds & be a
fixture.
Fig. I shows a bottom bolt in its normal position unacted upon by the fingers with
both fingerholds flush with the front of the bolt. If it is desired to push out the rod
of the holt the finger is inserted at 1) the finger-hold lowered at right angles with the
surface of the bolt & a firm handle is thus obtained by which the rod can be con-
veniently pushed out. Directly the fingerhold is released it is brought flush with the
front of the bolt by the counterpoise. To push the rod back into its normal position
the other fingerhold is used in a similar way.
A tooth or peg is attached to the frame of the bolt (see E) over which the fingerhold
slides hooks itself by its own weight so that the rod of the bolt cannot be moved
until the fingerhold is lifted over it.
The counterpoise may be removable and be attached in any manner most suitable for
the purpose.
The drawings accompanying this specification do not show the exact form my
apparatus may take & I may alter modify or re-arrange the various sizes &
proportion of the different parts. The bolts may be made in any material or any
size or shape.
Having now particularly described and ascertained the nature of my said inven-
tion and in what manner the same is to be performed I declare that what I
claim is :
1st. The right to add to an ordinary flush bolt a pair of finger-holds (with a
counterpoise attached) centred on the rod of the bolt by means of which firm holding
pieces or handles are provided to push out or pull in the rod.
2nd. To make the counterpoise removable from and attachable to the 2 fingerholds
in any manner I may deem most suitable to effect my purpose or make the counterpoise
forn part of either of the fingerholds.
3rd. To attach a tooth or peg to the frame of the bolt over which one of the finger-
holds slides & locks itself.
Dated this 29th day of October 1980