A NEW SELF-acting BOLT OR CATCH
Year: 1875

page_text: LETTERS PATENT to William John Hinde, of 237, Euston Road, in
the County of Middlesex, for the Invention of "A NEW SELF-acting
BOLT OR CATCH."
Sealed the 6th July 1875, and dated the 28th April 1875.
PROVISIONAL SPECIFICATION left by the said William John Hinde
at the Office of the Commissioners of Patents, with his Petition,
on the 28th April 1875.
I, WILLIAM JOHN HINDE, of 237, Euston Road, in the County of
Middlesex, do hereby declare the nature of the said Invention for "A
NEW SELF-ACTING BOLT OR CATCH," to be as follows :-
A plate of cither brass, iron, or other metal, with a bar through
centre having bearings at both ends on or in the plate, with a rising
catch at one end of bar to act as a bolt, and a striking catch at the
other for the purpose of raising or turning the bar, so as the door in
shutting shall depress the striking catch and thereby raise the bolting
catch, and so fasten the door. The same bolting catch being released by
opening the door and driven back to its original place in the metal plate

page_text: by the action of a spring or other method. The bolt to be either
inserted in the door itself or put over or under the door as best suits the
case. For instance in a wardrobe either in the door itself or over the
top in the cornice or plinth as it suits best.
Office on the 28th October 1875.
TO ALL TO WHOM THESE PRESENTS SHALL COME, I, WILLIAM
JOHN HINDE, of 237, Euston Road, in the County of Middlesex, send
greeting.
WHEREAS Her most Excellent Majesty Queen Victoria, by Her
Letters Patent, bearing date the Twenty-eighth day of April, in the year
of our Lord One thousand eight hundred and seventy-five, in the thirty-
cighth year of Her reign, did, for Herself, Her heirs and successors,
give and grant unto me, the said William John Hinde, Her special
licence that I, the said William John Hinde, my executors, admini-
strators, and assigns, or such others as I, the said William John
Hind, my executors, administrators, and assigns, should at any time
agree with, and no others, from time to time and at all times thereafter
during the term therein expressed, should and lawfully might make
use, exercise, and vend, within the United Kingdom of Great Britain
and Ireland, the Channel Islands, and Isle of Man, an Invention for
"A NEW SELF-ACTING BOLT OR CATCH," upon the condition (amongst
others) that I, the said William John Hinde, my executors or admi-
nistrators, by an instrument in writing under my, or their, or one of
their hands and seals, should particularly describe and ascertain the.
nature of the said Invention, and in what manner the same was to
be performed, and cause the same to be filed in the Great Seal Patent
Office within six calendar months next and immediately after the date
of the said Letters Patent.
NOW KNOW YE, that I, the said William John Hinde, do hereby
declare the nature of my said Invention, and in what manner tho
same is to be performed, to be particularly described and ascertained in

page_text: and by the following statement and accompanying Drawing (that is
to say) :-
This Invention consists of a new self-acting bolt or catch, and it is more
especially applicable to folding doors, such as the doors of wardrobes,
cabinets, and cupboards, and to other positions where (as in double doors)
one door has to be bolted or fastened before the other is closed and
locked. It has for its object the avoiding of the trouble of so bolting and
fastening as required by the methods ordinarily used. I take a plate of
suitable size and material, preferably brass, iron, or other metal, which
I insert and fix by screws or other convenient means, either in the edge
of the door itself, or in the door frame above or below the door as may be
most convenient. In the case of a wardrobe for example, it may be fixed
either in the door itself or over the top in the cornice, or on the bottom
in the plinth. At the back or inside of this plate I arrange a longitu-
dinal bar turning in bearings, formed either in or upon or attached to
the plate; and at or near one end of the bar I form or attach a catch
which projects through a corresponding opening in the plate, and is
arranged so that it is struck by the door which is last closed when the
latter is shut to. As the catch described (which I call the striking
catch) is thus struck and forced round through the opening in the plate
a similar catch (which I call the bolting catch) suitably arranged at or
near the other end of the bar is projected out through another corre-
sponding opening in the plate into a position in front of the door which
was first closed, or into a mortice hole cut in the thickness of the door
at the top or bottom, as the case may be. The door is thus prevented
from moving from its position until the striking catch first described is
again released by opening the second door. I use a spring or weight
or other convenient means to bring the bar and the two catches upon
it into their original position when the striking catch is so released.
The accompanying Drawing is in illustration of my Invention.
Figure 1 is a plan; Figure 2, a front view; and Figures 3 and 4, end
views of a bolt. a is the plate having behind it the bar b turning in the
bearings c, d. The bar 6 has near its ends the striking catch e and the
bolting catch which are retained in the position shewn in the Figures
by the spring g, the bolt is fixed in such a position that the two doors
h, i, (shewn in dotted lines in Figure 2) meet between the catches.
The action of the bolt is as follows:-The door having been shut
the door i is then closed and strikes the catch e which is forced into the

page_text: position shewn in Figure 4, and in doing so turns the bar 6 and projects
the catch in front of the door which is thus locked until the door i
is again opened when the catches are returned to their original position
by the spring 9.
Where a simpler and cheaper form of my Invention is to be used I use
no plate to carry the bar and catches as above described, but I make the
bar with its ends bent round at the proper angles to form the catches,
and I support it by rings or bearings screwed into or upon the door frame.
A spiral spring round the bar may be used to bring the catches back to
their original positions..
In putting my Invention into operation I do not confine myself to
the precise form and arrangement of apparatus as described and shewn
in the Drawing, which may be modified to suit varying circumstances,
but I claim,-
The arrangement of the striking catch and the bolting catch upon a
bar turning in bearings, so that when one door strikes the striking
catch the bolting catch retains the other door, substantially as described
and shewn in the Drawing.
Also the general arrangement of the bolt, substantially as and for the
purpose described.
In witness whereof, I, the said William John Hinde, have here-
unto set my hand and seal, this Twenty-seventh day of October,
in the year of our Lord One thousand eight hundred and seventy-
five.
WILLIAM JOHN HINDE. (L.s.)