An Improved Attachment for a Carpenter's Brace for Screwing Nuts upon Bolts.
Year: 1897

page_text: Date of Application, 4th Oct., 1897
Complete Specification Left, 23rd May, 1898-Accepted, 16th July, 1898
An Improved Attachment for a Carpenter's Brace for Screwing
Nuts upon Bolts.
I, HENRY JAMES JOSEPH BOWELL, of Yankalilla, in the Colony of South Australia,
Blacksmith, do hereby declare the nature of this invention to be as follows:-
The object of this invention is to provide a tool for more rapidly screwing nuts upon
screw bolts. The tool consists of an attachment for the ordinary carpenter's brace,
the working end of such attachment being provided with a square socket or hole as
large or larger than the nut to be screwed on.
This socket is shallow except at its central part which has a further recess or hole,
which is deep and has a diameter larger than the diameter of the screwed end of the
bolt on which the nut is to be screwed. In working with this tool, the nut being upon
the bolt, the aforesaid socket is placed over the nut, which has to be screwed home, or
unscrewed as the case may be. The outer face of the nut in some cases contacts with
the shallow base of the socket, the size of said socket not being so large that the
attachment can be turned without turning the nut. Pressure placed by the operator
When the
on the brace will be communicated to the nut, and expedite the work.
bolt begins to project through the nut it enters the deep central recess, so that the nut
may be screwed home, even when a long piece of the bolt is left projecting. By
reducing the sides of the socket inwardly to form a series of steps as in the form of a
truncated stepped pyramid the same socket will serve for a more or less extensive
range in the size of the nuts which can he operated, according to the number of
steps used.
Dated this 4th day of October 1897
WHEATLEY & MACKENZIE,
40, Chancery Lane, London, W.C., Agents.
CUMI LEID
An Improved Attachment for a Carpenter's Brace for Screwing
Nuts upon Bolts.
I, HENRY JAMES JOSEPH BOWELL, of Yankalilla, in the Colony of South Australia,
Blacksmith, 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
following statement :-
The object of this invention is to provide a tool for rapidly screwing nuts upon
screw bolts, and it consists of an attachment for the ordinary carpenter's brace, the
working end of such attachment being provided with a square socket or hole as large
or larger than the nut to be screwed on.

page_text: nut.
This socket is shallow except at its central part which has a further recess or hole,
which is deep and has a diameter at least a little larger than the diameter of the
screwed end of the bolt on which the nut is to be screwed. In working with this tool
the nut being upon the bolt, the aforesaid socket, is placed over the nut, which has to
be screwed home, or unscrewed, as the case may be. The outer face or end of the nut
in some cases contacts with a base of the shallow part of the socket, the size of the
said socket not being so large that the attachinent can be 'turned without turning the
Pressure placed by the operator on the brace will be communicated to the nut,
and expedite the work. When the bolt, passes through the nut and projects it enters
the deep central recess, so that the nut may be screwed home, even when a long piece
of the bolt is left. projecting. By reducing the diameter of the socket inwardly to
form steps as shown in the drawing herewith the same socket will serve for a range of
sizes of nuts which can be operated by the one tool; but in some cases I use separate
tools each adapted only for one size of nut. Referring now to the attached drawings
illustrating an embodiment of my invention, Figure 1 is a longitudinal section of my
attachment A engaging a nut Y on bolt X and Figure 2 is a like section of the attach-
ment engaging a smaller nut Z on bolt X¹. Figures 3 and 4 show respective
transverse sections of the attachment, nut, and bolt, on the line 5 in Figures 1 and 2.
B is the hollow end of the attachment, the centre of the recess being deepest. The
outer shallow end of the recess has respective surfaces E and F against which the ends
of Y or will contact according to the size of the nut, and has inner edges C and D
against which the sides of the nuts contact. If a nut to be screwed on is larger than Y
or smaller than Za different attachment must be used having one or more sockets, of
which, one shall be the right size to fit the nut. The depth of the socket i.e. from the
outer extremity of the attachment to the surface E, (or F as the case may be) must be
Jess than the thickness of the nut, otherwise a nut could not be screwed home against a
Hat surface such as 6. It is to be understood that I do not limit my construction to
square sockets as for hexagonal nuts the shape of the sockets would be modified
accordingly.
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
1. A brace attachment deeply recessed at the outer end, and provided with a socket
as described to fit a nut and enable it to be rapidly screwed upon bolts.
2. A brace attachment A, having a hollow end B, sides C and D to fit nuts of
different sizes, and surfaces E and F, against one of which the end of the nut to be
operated may bear, substantially as set forth.
Dated this 23rd day of May 1898.