IMPROVEMENTS IN APPARATUS FOR BORING AND DRILLING
Year: 1871

page_text: PROVISIONAL SPECIFICATION left by James William Parker at the
Office of the Commissioners of Patents, with his Petition, on the
16th February 1871.
I, JAMES WILLIAM PARKER, of No. 6, Lilford Road, Camberwell, in
the County of Surrey, Gentleman, do hereby declare the nature of the
said Invention for "IMPROVEMENTS IN APPARATUS FOR BORING AND DRILLING,"
to be as follows:-
My Invention consists of a bracket frame or brace for boring and
drilling, so constructed as to be capable of attachment by means of
atmospheric pressure to the solid surface, against which the said bracket
frame or brace is required to be held or supported.
The said bracket frame or brace consists (by preference) of two
uprights connected at their upper ends by a cross bar in a bearing, in
which the upper part of the auger bar or spindle herein-after described

page_text: turns and slides, or against the under side of which cross bar the upper
end of the drill spindle bears when a ratchet or crank brace is used. To
the foot of each upright is fixed or jointed a flat circular metal frame,
having at its under side a disc of india-rubber or leather. When the
bracket frame or brace is in use the edges of these discs are pressed t
between their frames and the surface, against which the said bracket
frame or brace is required to be held. The said discs are capable of
being raised or partially drawn into their frames by means of screws, so
as to leave a vacuum between the said discs and the aforesaid surface,
and thus cause the said bracket frame or brace to be held firmly against
such surface by atmospheric pressure on the upper sides of the said
discs. When the bracket frame or brace is to be used for boring the
auger used is carried by a bar or spindle which revolves and slides in a
bearing formed in the cross bar herein-before referred to, and is driven
by means of a pulley or rigger through which the said bar or spindle
slides, and to which it is connected by means of a groove and feather.
This arrangement of my improved apparatus is very useful for boring
the holes for trenails and for other analogous purposes. When the
bracket frame or brace is to be used for drilling the cross bar is made
without the bearing herein-before referred to, and " centres " are punched
on the under side of the said bar for the upper end of the drill spindle to
bear against. A single disc or three or more discs may be used in
connection with my improved bracket frame or brace, the form of which
will vary accordingly.
Although I have described the use of discs of india-rubber or leather,
pieces of india-rubber or leather of a rectangular, polygonal, or other
suitable form may be used instead of such discs, the frames to which
such pieces are applied being made of a corresponding form. The
bracket frame or brace may be made in one piece, or it may be made in
two or more pieces or parts so arranged as to allow of their relative
adjustment. Thus the cross bar herein-before referred to may be made
telescopic. Or a horizontal slotted bar may be affixed to each upright,
such bars sliding over one another, and being fixed in position by screws
and bolts. Or holes may be made in the uprights to admit of their
being slidden upon the cross bar, the said uprights being fixed in
position by means of set screws.

page_text: My improved bracket frame or brace is especially useful in situations
where it is difficult or impossible to get at the under side of the article
to be bored or drilled, and where a bracket of the ordinary kind would
consequently be inconvenient or inadmissible.