IMPROVED APPARATUS FOR DRILLING AND BORING
Year: 1856

page_text: LETTERS PATENT to Thomas John Chipp and Richard Bitmead, at present
of Soho, in the County of Middlesex, for the Invention of "IMPROVED
APPARATUS FOR DRILLING AND BORING."
Sealed the 20th February 1857, and dated the 22nd August 1856.
PROVISIONAL SPECIFICATION left by the said Thomas Jolin Chipp and
Richard Bitmead at the Office of the Commissioners of Patents, with
their Petition, on the 22nd August 1856.
We, THOMAS JOHN CHIPP and RICHARD BITMEAD, at present of Soho, in
the County of Middlesex, do hereby declare the nature of the said Invention
for "IMPROVED APPARATUS FOR DRILLING AND BORING" to be as follows:-
This improved apparatus is designed as a substitute for the clamp and the
weighted beam or lever usually employed to support the upper end or centre
of the brace or boring bar in drilling or boring by hand.
The apparatus is composed of the following parts:-Firstly, a vertical rod
or standard, which is firmly screwed to the bench by means of a suitable foot
piece. Upon this vertical rod a boss is mounted loosely, so as to be capable of
being raised or lowered and turned round upon the said rod, and is fixed when
in the desired position by means of a tightening screw or screws.
provided with two horizontal mortices (one on each side of the rod), in which
slide the two parallel bars of a horizontal beam; this beam is formed of two
parallel bars, united at each end by a cross piece. Upon these bars a carriage
This boss is

page_text: slides, being provided with mortices for that purpose, and is held, when in the
required position, by a tightening screw or screws. This carriage is pierced
in a vertical direction through about its centre with a hole, in which is cut or
formed a left-handed female screw, through which a suitably screwed rod
works. This rod is furnished with a hand wheel, and has a small centre hole
punched in its lower extremity for the reception of the pointed end of the
brace or boring bar.
SPECIFICATION in pursuance of the conditions of the Letters Patent, filed
by the said Thomas John Chipp and Richard Bitmead in the Great Seal
Patent Office on the 21st February 1857..
TO ALL TO WHOM THESE PRESENTS SHALL COME, we, THOMAS
JOHN CHIPP and RICHARD BITMEAD, at present of Soho, in the County of
Middlesex, send greeting.
WHEREAS Her most Excellent Majesty Queen Victoria, by Her Letters
Patent, bearing date the Twenty-second day of August, in the year of our
Lord One thousand eight hundred and fifty-six, in the twentieth year of Ier
reign, did, for Herself, Her heirs and successors, give and grant unto us, the
said Thomas John Chipp and Richard Bitmead, Her special licence that we,
the said Thomas John Chipp and Richard Bitmead, our executors, adminis-
trators, and assigns, or such others as we, the said Thomas John Chipp and
Richard Bitmead, our 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 miglit make, use,
exercise, and vend, within the United Kingdom of Great Britain and Ireland,
the Channel Islands, and Isle of Man, an Invention for "IMPROVED APPARATUS
FOR DRILLING AND BORING," upon the condition (amongst others) that we, the said
Thomas John Chipp and Richard Bitmead, our executors or administrators,
by an instrument in writing under our, or one of our or their, or one of their
hands and seals, should particularly describe and ascertain the nature of the
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 Richard Bitmead, do hereby declare
the nature of the said Invention, and in what manner the same is to be per-
formed, to be particularly described and ascertained in and by the following

page_text: statement in writing, and on reference to the accompanying Sheet of Drawings,
that is to say:-
This improved apparatus is designed as a substitute for the clamp. and the
weighted beam or lever usually employed to support the upper end or centre
of the brace or boring bar in- drilling or boring by hand. The apparatus is
composed of the following parts:
Firstly, a vertical rod or standard, which is firmly secured to the bench by
means of a suitable foot piece. Upon this vertical rod a boss is mounted
loosely, so as to be capable of being raised or lowered and turned round upon
the said rod, and is fixed; when in the desired position, by means of a
tightening, screw or screws. This boss is provided with two horizontal
mortices (one on each side of the rod), through which pass the two parallel
bars-of a horizontal beam: This-beam is formed of two parallel bars, united
at each end by a cross piece. Upon these bars a carriage or sliding nut
moves (being provided with mortices for that purpose), and is held, when in
the required position, by a tightening screw or screws. This carriage or
sliding unit is pierced in a vertical direction. through about its centre with a
hole, in which is cut or formed a left-handed female screw, through which
a suitably screwed rod works. This rod is furnished with a hand wheel, and
has a small centre hole punched in its lower extremity for the reception of the
pointed end of the brace or boring bar.
The practical construction and arrangement of this improved apparatus for
drilling and boring will be better understood upon referring to the Sheet of
illustrative Drawings hereto annexed, and the following explanation thereof,
that is to say:-
Figure 1 represents a side elevation of the apparatus; and Figure 2, a
plan view of the same. The vertical rod a, a, is firmly screwed to the
bench b, b, by means of the foot piece c, c, and is supported at its upper end
by the bracket d, d, bolted to the wall. Upon the rod a, a, is mounted loosely
the boss e, e, so as to be capable of being raised or lowered and turned round
upon the said rod, and is fixed when adjusted by the screw f. The boss e, e,
is further supported by the moveable collar g, g, which is fixed by the screw h.
i, i, are two parallel bars, passing through mortices in the boss e, e, and con-
nected together at their ends by cross pieces k, k. Upon the bars i, i, a
carriage or sliding nut 1, 1, is mounted. This carriage 1, 1, is capable of
sliding on the bars i, i, and is fixed when adjusted by the tightening screw m.
The centre of the carriage or sliding nut 7, 1, is tapped in a vertical direction
with a left-handed female screw, through which a similarly screwed rod n, n,
passes. The screwed rod n, n, is provided with a hand wheel o, o, and its

page_text: lower extremity has punched therein a centre hole to receive the upper or
pointed end of the brace p, p.
It will be evident that the improved apparatus above described, and shewn
in the accompanying Sheet of Drawings, is capable of being readily adjusted
in every direction, and fixed as required; and I would remark, in conclusion,
that I claim as the Invention secured to us by the above in part recited
Letters Patent the general construction and arrangement of the apparatus, as
shewn and described, without being limited to the precise details or to the
proportions or dimensions of the various parts.
In witness whereof, I, the said Richard Bitmead, have hereunto set my
hand and seal, this Sixteenth day of February, in the year of our Lord
One thousand eight hundred and fifty-seven.
RICHARD BITMEAD. (L.B.)¯