An Improved Adjustable Drill Holder or Socket.
Year: 1890

page_text: Date of Application, 2nd Dec., 1890
Complete Specification Left, 15th lug., 1891-Accepted, 19th Sept., 1891
PROVISIONA. SPECIFICATION.
An Improved Adjustable Drill Holder or Socket.
We, THOMAS DUNN, of 67 Denham Terrace, Wallsend-upon-Tyne, in the County
of Northumberland, and JOHN TWEEDY, of Neptune Works, Newcastle-upon-Tyne,
Northumberland, Engineer and Shipbuilder, do hereby declare the nature of this
invention to be as follows:-
:-
This invention has for object an improved adjustable drill holder or socket the
length of which can be easily and readily adjusted to the requirement of the work
in hand. The holder comprises two parts, a drill socket and a lengthening piece.
The socket is arranged at one end to receive the drill, and at the other end it is
fitted to receive a screwed lengthening piece which can be inserted into it to a
greater or less extent, as required. To cause the motion of the lengthening piece
to be transmitted to the socket there is provided a sleeve or ferrule which fits over
both lengthening piece and socket. This is so shaped or otherwise constructed or
equipped that it will oblige the socket to partake of the rotary motion of the
lengthening piece. For instance the lengthening piece may have a square or
hexagon formed on it, there being a corresponding square or hexagon in the sleeve
or ferrule. The socket may also have a square or hexagonal part, or the sleeve
may be connected to it by a set screw, or by some other attaching device. Or,
instead of the square or hexagon a feather key with a corresponding keyway may
be employed.
In using the improved drill holder or socket the sleeve or ferrule is first slipped
back; then the lengthening piece is inserted into the socket to the required dis-
tance, and finally the sleeve or ferrule is placed in position over both lengthening
piece and socket.
Dated this 2nd day of Disambar 1000
W. LLOYD WISE,
Per F. J. Brougham,
46, Lincoln's Inn Fields, London, W.C., Agent for the Applicants.
COMPLETE SPECIFICATION.
An Improved Adjustable Drill Holder or Socket.
We, THOMAS DUNN, of 67 Denham Terrace, Wallsend, in the County of
Northumberland, Blacksmith, and JOHN TWEEDY, of Neptune Works, Newcastle-
on-Tyne, Engineer and Shipbuilder, do hereby declare the nature of this inven-
tion and in what manner the same is to be performed to be particularly described
and ascertained in and by the following statement:―
This invention has for object an improved adjustable drill holder or socket the
length of which can be easily and readily adjusted to the requirement of the work
in hand. The holder comprises two parts, a drill socket and a lengthening piece.
The socket is formed at one end to receive the drill, and at the other end to receive
a screwed lengthening piece which can be inserted into it to a greater or less extent,
as required. To cause the motion of the lengthening piece to be transmitted to
the socket there is provided a sleeve or ferrule which fits over both lengthening
piece and socket. This is so shaped or otherwise constructed or equipped that it
will oblige the socket to partake of the rotary motion of the lengthening piece. For
instance the lengthening piece may have a square or hexagon formed on it, there
being a corresponding square or hexagon in the sleeve or ferrule. The socket may
also have a square or hexagonal part, or the sleeve may be connected to it by a
D

page_text: set screw, or by some other attaching device. Or, instead of the square or hexagon,
a feather key with a corresponding key-way may be employed.
In using the improved drill holder or socket, the sleeve or ferrule is first slipped
back; then the lengthening piece is inserted into the socket to the required distance,
and finally the sleeve or ferrule is placed in position over both lengthening piece
and socket.
In the annexed sheet of illustrative drawings there are shewn two forms of
adjustable drill holder or socket according to my invention.
Fig. 1 shews the first partly in elevation, and partly in section, while Fig. 2 is a
section in line ab of Fig. 1.
1 is a lengthening piece shaped at its upper end to fit the spindle of a drilling
machine or ratchet brace and having a screwed shank 2 at its lower end. Above
the screwed shank 2 it has a boss 3 of square form with rounded corners. The drill
socket 4 is tapped to receive the screwed shank 2, and at its upper part is shaped
similarly to the boss 3. The sleeve or ferrule 5 is shaped internally to fit the
boss 3 and the correspondingly formed part of the drill socket. It is fitted with
a set screw 6 to prevent chattering of the various parts when they are in motion
and to prevent the sleeve or ferrule slipping back when the socket is used in an
inverted position.
Figs. 3-4 are similar views to Figs. 1 and 2 of a modified form of drill holder or
socket, Fig. 4 being a section in line c d of Fig. 3. 1 is the lengthening piece
ending in the screwed part 2. This fits into the screw threaded interior of the drill
socket 4. The upper end of the drill socket is hexagonal exteriorly (Fig. 4).
The sleeve or ferrule 5 is hexagonal where it fits over the socket 4, while at its
upper end its interior is shaped to embrace the two flats 7 on the screwed part 2.
It will be seen that when the sleeve or ferrule is removed from the socket the
lengthening piece can be screwed in or not as required, and that on the sleeve or
ferrule being replaced the socket is obliged to turn with the lengthening piece.
Having now particularly described and ascertained the nature of the said inven-
tion and in what manner the same is to be performed we declare that what we
claim is :-
:―
1. In an adjustable drill holder, a lengthening piece capable of being screwed to
a greater or less distance into a drill socket, in combination with a sleeve or ferrule
fitting both lengthening piece and socket, and so constructed that it will commu-
nicate the motion of the former to the latter, substantially as described.
2. The adjustable drill holders constructed and arranged substantially as herein-
before described with reference respectively to and shewn in Figs. 1 & 2, and in
Figs. 3 and 4 of the drawings annexed.
נית
101 1
W. Lloyd Wise,
THOMAS DUNN.
JOHN TWEEDY.
46, Lincoln's Inn Fields, London, W.C., Agent for the Applicants.