Year: 1888

page_text: Date of Application, 2nd Jan., 1888
Specification Accepted, 24th Feb., 1888
We, CHARLES GROOMBRIDGE, of Ashville Road, Leytonstone, in the County of
Essex, Inventor, and JAMES PELLATT RICKMAN, of 17 Saint Bride Street, in the
City of London, Manufacturer, 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, reference being had to the accom-
panying drawings and to the letters and figures marked thereon, that is to say :-
Our invention relates to an improved bolt, and it has for its object to provide
secure means of fastening doors, gates, and articles of furniture.
Our improved bolt which may be of any suitable shape, as for instance, flat, or
rectangular, or barrel-shaped, is illustrated in the accompanying drawings, in which
fig. 1 is a front elevation and fig. 1× an end view of a sliding flat bolt constructed
according to our invention. Fig. 2 is a perspective view of a barrel-shaped lock bolt.
Figs. 34 and 5 refer to a modification of the bolt shewn in fig. 1.
Like letters of reference indicate the same parts throughout the figures.
Fig. 1 shews, in full lines, the bolt in its open or drawn position; the dotted lines
shew it in its closed or shot position, and the dot and dash lines in its half open
position.
A is the casing or box of the bolt B which consists, in this instance, of a rectangular
bar, shaped as shewn, to enable it to slide between the two holes h, h', formed in the
casing, and serving to receive the screws.
C is a slot cut through the front or face plate of the box or casing, and consisting
of two circular openings a a', connected together by a rectangular slot a², as shewn in
figs. 1 and 2, or united as shewn in fig. 4. Into these openings a thumb piece c is free
to slide to and fro; it is secured to the rear end of the bolt, and can be turned round
upon its axis so as to be brought, when the bolt is being shot. into a position parallel
to the edge of the casing, as shewn in dot and dash lines in Fig. 1. This position
enables it to pass along and through the rectangular slot a². But in order to lock the
said bolt when it is either open, as shewn in full lines, in the figure, or closed as shewn
in dotted lines, the thumb-piece is turned in either of the circular openings in a
transverse, or perpendicular position to the edge of the box or casing, thus tightly
locking the bolt in either position, without turning the bolt proper.

page_text: In fig. 2 the barrel-shaped bolt is solid, and moves in its casing in the same manner
as the above described flat or rectangular bolt.
In this instance, the casing is provided with perforated lugs e, through which it is
fixed in position by means of screws,. nails, or other means of attachment.
Figs. 34 and 5 shew, in front back and end views respectively, a bolt similar to
that described with reference to fig. 1, with this difference, that the bolt is arranged
to be worked by means of a handle F, whose spindle or shank 1, passes through. the
door, and through the bolt, and is fixed on the other side to the locking piece r of the
bolt, which may be either flush with the casing or box, or may project a little above
the same.
The shank or spindle which moves in the slot n, and is retained therein
by means of a collar m, projects on the other side of the door, thus affording means of
operating the bolt from the outside of the door.
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:
1st. A bolt, in which the casing or box is provided with a slot formed by two
circular openings, and the bolt proper is furnished with a thumb-piece or pusher
capable of being turned in a horizontal direction, so as to cause the said thumb piece
or pusher to pass from one slot to the other, when the bolt is to be shot or withdrawn,
and of being turned in a vertical direction, in either slot, on the bolt proper being
shot or withdrawn, so as to lock the same, substantially as hereinbefore described.
2nd. The special construction of bolt, as hereinbefore described with reference to
figs. 1 and 2 of the drawings.
3rd. The modified construction of bolt, as hereinbefore described with reference to
figs. 34 and 5, of the drawings, in which the pusher is arranged to be actuated by a
handle, operated from the outside of the door.