Improvements in Breast Drills and Braces.
Year: 1892

page_text: Date of Application, 11th Jan., 1892
Complete Specification Left, 10th Oct., 1892-Accepted, 26th Nov., 1892
PROVISIONAL SPECIFICATION.
Improvements in Breast Drills and Braces.
I, ARTHUR ALBERT TATTERSALL of 31 Dixon Avenue, Crosshill, Glasgow,
Engineer, do hereby declare the nature of this invention to be as follows:-
This invention relates to breast drills and braces and it has for its object to
improve their construction.
The invention consists essentially in fitting or making a point or centre in or on
the breast piece so that when, in certains positions, sufficient pressure cannot be
brought to bear directly on the breast piece, a piece of wood or a metal bar or
equivalent can be placed against it and its leverage used to produce the required
pressure.
In carrying out my invention I may make the spindle of the breast drill or brace
with a point or centre at its end and the breast piece can be made to screw on and
off in such manner that, when it is on, the centre or point will not project; or the
centre may be made to project through the breast piece which, in this case, may be
a permanent fixture. In some cases the pin or centre may be screwed or fitted
into the breast piece which latter and preferably also the spindle of the drill or
brace is made with a hole for its reception. The centre or pin may be made as
part of the breast piece.
In some cases if so desired the centre may be made as a hole in the breast piece
in this case the bar of metal or wood constituting the lever would have a projection
on it to fit into the hole.
The breast piece may be of any desired shape.
The pin or centre may also be made of any suitable form.
Dated this 9th day of January 1899
H. D. FITZPATRICK,
70, Wellington Street, Glasgow, Agent.
COMPLETE SPECIFICATION.
Improvements in Breast Drills and Braces.
I, ARTHUR ALBERT TATTERSALL, of 31 Dixon Avenue, Crosshill, Glasgow,
Engineer, 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 :-
This invention relates to breast drills and braces, and it has for its object to
improve their construction.
The invention consists essentially in fitting or making a point or centre in or on
the breast piece, so that when, in certain positions, sufficient pressure cannot be
brought to bear directly on the breast piece, a piece of wood or a metal bar, or
equivalent can be placed against it and its leverage used to produce the required
pressure.
In carrying out my invention I may make the spindle of the breast-drill or brace
with a point or centre at its end and the breast piece can be made to screw on and
off in such manner that when it is on, the centre or point will not project; or the
centre may be made to project through the breast piece which in this case may be
a permanent fixture. In some cases the pin or centre may be screwed or fitted
into the breast piece which latter and preferably also the spindle of the drill or
brace is made with a hole for its reception. The centre or pin may be made as
part of the breast piece.

page_text: The breast piece may be of any desired shape.
The pin or centre may also be made of any suitable form.
And in order that my said invention may be properly understood, I have
hereunto appended an explanatory sheet of drawings, whereon :-
Figs. 1 to 6 show different methods of fitting a point or centre on the breast
piece.
Referring to the drawings
:―
a is a point or centre which is made in or on the breast piece b so that when, in
certain positions, sufficient pressure cannot be brought to bear directly on the
breast piece, a piece of wood or a metal bar can be placed against it, and its
leverage used to produce the required pressure.
As shown at Fig. 1, the point or centre a is made on the spindle c of the drill,
and it is screwed for the reception of the breast piece b. The point is shown as
counter-sunk, so that, when it is necessary to use the point, the breast piece must
be taken off.
Fig. 2 shows the point as made on the spindle c of the drill, and as projecting
through the breast piece b.
Fig. 3 shows the centre or point as made in one with the breast piece b. The
breast piece is screwed on to the end of the spindle c.
Fig. 4 shows the point a as fitted into the end of the spindle c.
Fig. 5 shows an adjustable point a. It is screwed on to the screwed projecting
end c, of the spindle c.
Fig. 6 shows the point or centre as screwed into the end of the spindle c of the
drill.
Braces may be made with points or centres in exactly the same way as the breast
drills.
The application and use of the centre is of great practical value, as, by the
application of a lever, the drill or brace can be made to bore in any position where
it is impossible to get bodily pressure, and any convenient pressure can be exerted,
thus saving hours of time in fixing ratchet tackle for drilling out broken set pins
and other small repair jobs, etc. By securing a broad door hinge to any upright
post, or to a wall, and fitting a lever to the hinge, pressure being brought to bear
on the lever by means of a cord pressed by the foot, or attached to a weight, the
drill can, for the time being, be converted into a small vertical drilling machine,
without framework or fixings.
The improved drills or braces can be applied anywhere by lever, breast or screw
pressure.
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 :-
A breast drill or brace, having a point or centre a in or on the breast piece,
substantially as and for the purpose set forth.
Dated this 7th day of October 1892.
H. D. FITZPATRICK,
70, Wellington Street, Glasgow, Agent.