IMPROVEMENTS IN BIT STOCKS
Year: 1882

page_text: LETTERS PATENT to George Frederick Redfern of the General Patent Office,
4 South Street, Finsbury, in the County of Middlesex, Patent Agent for an
Invention of "IMPROVEMENTS IN BIT STOCKS" A communication to him
from abroad by John Post Lawrence of Worship Street, in the County of
Middlesex, but temporarily of Philadelphia in the state of Pennsylvania,
United States of America
PROVISIONAL SPECIFICATION left by the said George Frederick Redfern
at the Office of the Commissioners of Patents on the 24th October 1882.
"
GEORGE FREDERICK REDFERN of the General Patent Office, 4, South Street,
Finsbury, in the County of Middlesex, Patent Agent IMPROVEMENTS IN BIT
STOCKS [A communication to him from abroad by John Post Lawrence of
Worship Street, in the County of Middlesex, but temporarily of Philadelphia in the
state of Pennsylvania, United States of America.]
This invention relates to improvements in that class of carpenters' bit stocks in
which a screw is used to obtain a rotary motion.
The object of the improvements is to gain a quick continuous though intermittent
rotary motion in one direction which is accomplished in the following manner.
A quick threaded screw works or telescopes in a tube (forming the body of the
stock) and in so doing is made to revolve by means of a nut in the lower end of
the tube with a chuck containing the bit placed therein.
Fixed on the upper end of the tube is a ball or hand piece with a loose hand
piece on the tube below the ball held in place by a collar; a sleeve revolves loose
over the chuck and is held in place between the screw and the chuck.
To make use of the improved stock, the screw is partially drawn out of the tube,
the ball and hand piece are grasped firmly with the right hand, the bit being
guided by the other hand placed on the sleeve to the place and object to be
operated upon. Pressure is then applied to the ball which will cause the screw to
telescope into the tube and communicate rotary motion to the chuck and the bit
held therein. The grasp on the ball is then relaxed and the hand piece held onto,
which will allow the ball to revolve in the hand and the tube to be draw off the
screw whilst the chuck and its bit will remain stationary. Pressure is then again
applied to the ball and so on.
Pressure may be brought to bear upon the work if required by the left hand
bearing on the sleeve.
The backward movement could also be obtained by means of a ratchet.

page_text: SPECIFICATION in pursuance of the conditions of the Letters Patent filed by
the said George Frederick Redfern in the Great Seal Patent Office on the
24th April 1883.
"
"
GEORGE FREDERICK REDFERN of the General Patent Office, 4, South Street
Finsbury, in the County of Middlesex, Patent Agent IMPROVEMENTS IN BIT
STOCKS A communication to me from abroad by John Post Lawrence, of Worship
Street, in the County of Middlesex but temporarily of Philadelphia, in the state of
Pennsylvania, United States of America
This invention relates to improvements in that class of carpenters' bit stocks in
which a screw is used to obtain a rotary motion.
The object of the improvements is to gain a quick continuous though intermittent
rotary motion in one direction which is accomplished in the following manner.
A quick or spirally threaded screw or spindle works or telescopes in a tubo
(forming the body of the stock) and in so doing is made to revolve (by means of a
nut in the lower end of the tube) with a chuck containing the bit placed therein.
Fixed on the upper end of the tube is a ball or hand piece with a loose hand
piece on the tube and below the ball held in place by a collar; n sleeve revolves
loose over the chuck and is held in place betweeen the serew and the chuck.
In order to enable the invention communicated to me to be fully understood I
will proceed to describe the same by reference to the accompanying drawing
which represents a perspective view of a bit stock constructed according to the
-improvements.
a, is the quick or spirally threaded spindle forming the tool holder; b, the tube
into which the threaded spindle a, telescopes or works; c, the nut in the lower
end of the tube b; g, the chuck containing the bit h, or any other bit that may be
placed therein; d, is the ball or hand-piece fast on the tube b; e, is the hand piece
"louse on the tube b, and held in place by the collar; i, is the sleeve which
revolves loose over the chuck g, and is held in place between the screw a, and the
'chuck g.
'
To make use of the improved stock, the spirally threaded spindle a, is partially
drawn out of the tube b, the ball d, and hand piece e, are grasped firmly with the
right hand, the bit h, being guided by the other hand placed on the sleeve i, to the
place and object to be operated upon. Pressure is then applied to the ball d,
which will cause the spirally threaded spindle a, to telescope into the tube b, and
*communicate rotary motion to the chuck g, and the bit , held therein. The grasp
on the ball d, is then relaxed and the hand piece e, held onto, which will allow the
ball d, to revolve in the hand and the tube b, to be drawn off the spirally threaded
spindle a, whilst the chuck g, and its bit h, will remain stationary. Pressure is
then again applied to the ball d, and so on.
Pressure may be brought to bear upon the work if required by the left hand
bearing on the sleeve i.
The backward movement could also be obtained by means of a ratchet.
Having thus described the invention communicated to me and the best means I
-am acquainted with for carrying the same into effect, I wish it to be understood
that what is claimed and intended to be protected by the herein in part recited
Letters Patent, is :—
Firstly. In combination with the spirally-threaded spindle or tool-holder, the
external tube and the two hand pieces, one fast and the other loose upon the tube.
Secondly. In combination with the threaded spindle or tool-carrier, the tube
exposed and adapted to be held against rotation by hand, a loose hand piece
1
1

page_text: applied to the said tube, as described, whereby the tube may be retracted and
permitted to revolve meanwhile upon the spindle.
Thirdly. The combination of the threaded spindle or tool-carrier, a tube for
rotating the same, and the loosely-rotating sleeve applied to the forward end of the
spindle independent of the tube.
Fourthly. The combination of the tube or body, the fast and loose hand-pieces,
the threaded spindle, and the sleeve loosely applied to the forward end of the
spindle.
In Witness whereof I the said George Frederick Redfern have hereto set my
hand and seal this twenty third day of April in the year of our Lord one
thousand eight hundred and eighty three.
G F REDFERN (I.S.)