IMPROVEMENTS IN ATTACHING PROVISIONAL SPECIFICATION
Year: 1870

page_text: LETTERS PATENT to Joseph Jackman (Traveller), of Sheffield, in the
County of York, for the Invention of “IMPROVEMENTS IN ATTACHING
PROVISIONAL SPECIFICATION left by the said Joseph Jackman at
the Office of the Commissioners of Patents, with his Petition, on
the 23rd December 1870.
I, JOSEPH JACKMAN (Traveller), of Sheffield, in the County of York,
do hereby declare the nature of the said Invention for "IMPROVEMENTS
IN ATTACHING PICKS AND OTHER TOOLS OR IMPLEMENTS TO HANDLES," to be as
follows:-
The object of my Invention is to attach picks, axes, adzes, hoes, and
other similar tools or instruments to their handles in such a manner that
they will be firmly held in position, and also be readily secured to or
detached therefrom.
In carrying out my Invention I provide a metal socket slotted to
receive the picking tool or blade, the socket being attached to a handle

page_text: in the usual manner. The picking tool or blade is made with a recess
or projection which fits into or upon a corresponding part of the socket,
or if preferred there may be a series of recesses or projections so as to
give the tool a firmer hold of the socket.
According to my Invention the picking tool or blade is secured in the
socket by means of a set screw, the point of which acts upon a gib
placed in the slot receiving the tool or blade to distribute the pressure
of the screw over a considerable surface of the tool, the set screw being
secured against slacking by one or more lock nuts. The set screw
works within the head or socket in which an opening is formed to give
access for adjusting the screw and lock nuts, the whole with the gib
being conveniently arranged on the shaft side of the tool, thus avoiding
all projections at the end or sides of the pick which are objectionable.
t
SPECIFICATION in pursuance of the conditions of the Letters Patent,
filed by the said Joseph Jackman in the Great Seal Patent Office
on the 23rd June 1871.
TO ALL TO WHOM THESE PRESENTS SHALL COME, I, JOSEPH
JACKMAN (Traveller), of Sheffield, in the County of York, send
greeting.
WHEREAS Her most Excellent Majesty Queen Victoria, by Her 1
Letters Patent, bearing date the Twenty-third day of December, in the
year of our Lord One thousand eight hundred and seventy, in the thirty-
fourth year of Her reign, did, for Herself, Her heirs and successors,
give and grant unto me, the said Joseph Jackman, Her special licence
that I, the said Joseph Jackman, my executors, administrators, and
assigns, or such others as I, the said Joseph Jackman, my 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 might make, use, exercise, and
vend, within the United Kingdom of Great Britain and Ircland, the
Channel Islands, and Isle of Man, an Invention for "IMPROVEMENTS IN
ATTACHING PICKS AND OTHER TOOLS OR IMPLEMENTS TO HANDLES," upon the
condition (amongst others) that I, the said Joseph Jackman my exc-
cutors or administrators, by an instrument in writing under my, or
their, or one of their hands and seals, should particularly describe and

page_text: ascertain the nature of the said 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 Joseph Jackman, do hereby declare
the nature of my said Invention, and in what manner the same is to
be performed, to be particularly described and ascertained in and by
the following statement:-
The object of this Invention is by the adoption of such suitable
mechanical arrangements as are hereafter described to attach in an
effectual manner picks, axes, adzes, hoes, and other similar tools or
instruments to their handles, in such a manner that they may be more
readily secured to or detached therefrom than by any arrangements or
construction heretofore known or used.
The
These arrangements are as follows:-I provide a socket of malleable
iron or other suitable material for receiving the picking tool or blade, this
socket being attached to a wooden handle in the usual manner.
picking tool or blade is made with a depression or protuberance which
fits into or upon a corresponding part of the socket, or, if preferred, there
may be a series of depressions or protuberances so as to give the tool a
firmer hold of the socket. The picking tool or blade is secured in the
socket by means of a set screw, the point of which acts upon a "gib" or
separate piece which distributes the pressure of the screw over a con-
siderable surface of the tool, the set screw is further secured against
slackening by the introduction of one or more lock nuts. The set screw,
gib, and lock nuts are conveniently arranged in the shaft side of the
tool, thus dispensing with all projections in the end or sides of the pick
which are objectionable.
The advantages of this Invention are that the tools may be casily
replaced when worn or damaged, that they may be readily and securely
fixed in their proper position in the socket so that the set screw being
provided with lock nuts will not easily work loose, and especially that the
' gib or separate piece will distribute the pressure of the set screw
over a considerable surface of the tool, thereby giving greater security
against slackening.
<6
"
Having thus described the nature and objects of my said Invention
and adverted to the manner in which the same is to be performed or
put in practice, I will now in further compliance with the condition in

page_text: the said Letters Patent contained particularly describe and ascertain
in what manner the said Invention is to be performed or put in
operation by describing the same with reference to the accompanying
Drawings as follows:-
-
DESCRIPTION OF THE DRAWINGS.
Fig. 1 of the Drawings is an exterior side view of the improved. pick
complete, drawn half size; Fig. 2 is a sectional view of the socket (A),
full size; Fig. 3 is the edge view, full size; Figs. 4, 5, 6, and 7 are
perspective views of the gib (B), full size; Fig. 8 is a rivet or pin (C)
by which the gib is kept in the socket, full size; Fig. 9 is a perspective
view of the set screw (D), full size; Fig. 10 is the lock nut (E), full
size; Fig. 11 is a rivet or screw (G) to fasten the socket more firmly to
the handle; Figs. 12, 13, and 14, (II) are perspective views of the
picking tool, half size; Fig. 15 is the handle (I) attached to the socket
piece (A); K, Fig. 6 are small pins for the purpose of catching against
Fig. 8 (C) and to keep the gib in the socket.
Having now particularly described and ascertained the nature and
object of my said Invention, and in what manner the same may be
performed or carried out in practice I hereby declare that I claim the
Invention of "Improvements in Attaching Picks and other Tools or
Implements to Handles wherein the use of the separate piece or "gib"
for distributing the pressure over a large surface of the tool is the
important feature.
"
In witness whereof, I, the said Joseph Jackman, have hercunto
set my hand and scal, this Nineteenth day of June, in the year of
our Lord One thousand eight hundred and seventy-one.
Witness,
THOMAS SEARLS,
Cannon Steel Works,
Carlisle Street,
Sheffield.
JOSEPH JACKMAN. (L.S.)