IMPROVEMENTS IN AND CONNECTED WITH THE CONSTRUCTION AND MANUFACTURE OF SOCKETS OR HOOPS FOR PICK SHAFTS AND OTHER SIMILAR TOOLS.
Year: 1884

page_text: I THOMAS BROWN of Regent Works Penistone Road Sheffield in the County
of York Steel manufacturer do hereby declare the nature of my Invention for
IMPROVEMENTS IN AND CONNECTED WITH THE CONSTRUCTION AND MANUFACTURE
OF SOCKETS OR HOOPS FOR PICK SHAFTS AND OTHER SIMILAR TOOLS. and in what
manner the same is to be performed, to be particularly described and ascertained
in and by the following statement :—
"
This Invention relates specially to that description of Pick in which the blade
is inserted in and secured in "eyes or "slots" in the hoop.
This Invention consists essentially in the construction of a hoop or socket from
strips of steel in which the part subjected to the greatest strain is made thicker
than the other parts, the socket or hoop being manufactured from specially rolled
double tapered strips from which blanks of special form with four projections aro
flyed, punched or cut out, the said blanks being folded over end to end to form
the body of the hoop and the said projections being folded one over the other to
form the two eyes or slots in which the blade is secured. The blank has two
projections on each side, one longer than the other, the long projections being
exactly opposite to each other and the short projections being likewise exactly
opposite to each other. The part of the blank between the projections, or the
projections and the part of the blank included within them, is thicker than the
remaining parts and when folded, forms the eye of the Pick hoop or socket.
The accompanying drawings illustrate my Invention. The same letters of
reference on each view, refer to the same detail part.
Fig. 2, is a
Fig. 1 is a front view of the "pick" with the shaft broken off.
longitudinal section as taken through the dotted line Y. Z. (Fig. 1) Fig. 3, is a
transverse section of the bar or strip from which the "blank is cut. Fig. 4 is
a plan of the blank; Fig. 5 is a front view of the hoop or socket; Fig. 6, is an end
view of the hoop or socket; Fig. 7 is a longitudinal section of the hoop as taken
through the dotted line Y Z (Fig. 5) Fig. 8 is a transverse section of the hoop as
taken through the dotted line WX (Fig. 5) Fig. 9 is a longitudinal section showing
part of the hoop with shaft wedged therein.
The projections A B of the blank are the same length and are longer than the
projections C. D, so that the projection A will fold over the projection C and the
projection over the protection D.

page_text: In the process of manufacture of the hoop, the blank is heated and folded from
the centre by mandrills until the points E and G are parallel to one another and
the projection B is opposite to the projection D and the projection A opposite to
the projection C. the projection B is folded over the projection D, and the
projection A over the projection C by which the eye of the pick is formed as
shown in Figs. 5, 6, 7 and 8. The parts A. C. and the parts DB are rivetted
together.
It is obvious that the blank and hoop may be made the same thickness
throughout but, I prefer to make it with a double taper as shown in Fig. 3.
As a modification to strengthen the hoop and provide a seat for the wedge H
(Fig. 9) a strip of sheet steel J may be inserted in the hoop resting on the parts
AC D. B the ends thereof being bent down over the parts A B. When the wood
shaft is inserted in the hoop, wedges K L are driven therein which spread out the
shaft sideways (embedding the heads of the rivets therein) thus firmly securing it
in the hoop.
The improved hoop can be used either with or without the flanged strip J.
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 :-
Firstly: The construction of a thin rolled steel socket or hoop fer Pick shafts
and other similar tools with eyes or slots to receive the blade manufactured from
a blank with two projections on each side, the said blank being folded endways
and sideways to form the body of the hoop and the said projections being folded
one over the other to form the eyes or slots and scat for the wedge as hereinbefore
specified and described.
Secondly: The construction of the hoop or socket herein before described in
reference to and as illustrated by Fig. 1 to Fig. 9 of the accompanying drawings in
which Fig. 3 and Fig. 4 show the blank and Fig. 1, Fig. 2, Fig. 5, Fig. 6, 7 and
Fig. 8 show the hoop or socket manufactured therefrom.
Thirdly: The process of manufacture of the improved hoop or socket firstly and
secondly claimed from double taper bars of steel rolled in an ordinary rolling mill
or tapered by eccentric rolls, the said blauks with projections being cut out from
the said double taper bars transversely.
Dated this ninth day of January 1884.