Year: 1886

page_text: I, MATTHEW WITHERS of New Annesley in the County of Nottingham, Miner,
do hereby declare the nature of this invention to be as follows:-
4.+
به
Heretofore the shaft heads of miners picks have been made to receive one sized
pick only, each sized pick being provided with a shaft having the head socket large
enough to allow of the insertion of the pick, which was secured therein by a loose
wedge driven in between the pick and the bottom of the socket.
My improvements consist in forming two broad V shaped recesses across the top
of each pick blade, and making each blade of exactly the same thickness and of
the same depth at that part which lies within the loop of the shaft head, the inside
of the top of the loop is formed with two projecting surfaces which closely fit into
the two broad V shaped recesses in the top of the blade. When a pick blade of
the required length and weight is placed in the loop it is secured in position by a
wedge being driven in between the bottom of the blade and the bottom of the
loop, each or either side of the loop, a short distance from the bottom is grooved
nearly the whole of its length in each or either of these grooves a stud which
projects from the sides of the wedge slides, and prevents the wedge from dropping
out, when the blade is removed.
By such means the pick blades may be readily changed without employing
a separate shaft and socket for each separate sized blade.

page_text: t
I MATTHEW WITHERS of New Annesley in the County of Nottingham Miner
do hereby declare the nature of my invention and in what manner the same is to
be performed, to be particularly described and ascertained in and by the following
statement:
DESCRIPTION OF THE DRAWINGS.
Figure 1 shows a side view of one of my improved picks secured in the loop of
a shaft head.
Figure 2 a side view of a similar but heavier pick.
Figure 3 a longitudinal section of an improved shaft head, and
Figure 4 a cross section of the same.
Figures 5. 6 and 7 show side views of three improved picks of various weights.
Heretofore the shaft heads of miners picks have been made to receive one sized
pick only, each sized pick having been provided with a shaft having the head
socket large enough to allow of the insertion of the pick which was secured therein
by a loose wedge driven in between the pick and the bottom of the socket.
My improvements consist in forming two broad V shaped recesses A across the
top of each pick blade, (as shown at Figures 2. 5. 6 and 7.) and making each blade
of exactly the same thickness, and of the same depth at that part which lies
within the loop of the shaft head, the inside of the top of the loop is formed with
two projecting surfaces B (shown at Figures 3 and 4) which closely fit into the
two broad V shaped recesses in the top of a pick blade.
When a pick blade of the required length and weight is placed in the loop of
the shaft head, it is secured in position by a wedge C being driven in between the
bottom of the blade and the bottom of the loop (as shown at. Figure 1).each or
either side of the interior of the loop a short distance from the bottom has a
shallow groove B₁ formed in it nearly the whole of its length, in each or either of
these grooves a stud C¹ which projects from the sides of the wedge slides and
prevents the wedge from dropping out when the blade is removed. By such means
pick blades may be readily changed without employing a separate shaft and socket
for each separate sized blade.
Having now particularly described and ascertained the nature of my said
invention and in what manner the same is to be performed I declare that what
I claim is
The Improved Miners Pick substantially as described and illustrated in the
Drawings annexed.
Dated this first day of May 1886.