Attachments to Shaits.
Year: 1886

page_text: Attachments to Shaits.
I, THOMAS BROWN, of Regent Works, Penistone Road Sheffield, in the County
of York, Steel Manufacturer, do hereby declare the nature of this invention and in
what manner the same is to be performed to be particularly described and
ascertained in and by the following statement:-
My invention relates to the construction of picks or similar tools and of the
sockets and wedges by which they are secured to shafts in such a manner that the
manufacture of these parts is greatly simplified, and great facility is given for
attaching the tool firmly to the shaft or detaching it therefrom. I will describe
the construction according to my invention referring to the accompanying
drawings. Fig. 1 is a side view of a pick secured to the shaft, Fig. 2 is a
side view and Fig. 3 a transverse section at X X of the pick blade, Fig. 4 is a
front view and Fig. 5 is a longitudinal section of the plate which forms the socket
before it is bent, Figs. 6 and 7 are front and side views of the wedge, Fig. 8 is a
transverse section and Fig. 9 is a longitudinal section of the socket and wedge, and
Fig. 10 is a sectional plan of the socket on the line Z Z of Fig. 9. A is the wooden
shaft, B is the blade, which, as shewn in Figs. 3 and 8 is of wedge form in section,
the under edge being widest and the sides converging to a rounded upper edge.
The part at b which is notched down to admit the loop of the socket is similarly
rounded at the upper edge to fit the correspondingly rounded loop of the socket as
shewn in Fig. 8. The socket S is a piece of plate made in the form shewn at
Fig. 6 somewhat thicker in the middle than at the extremities as shewn in Fig. 5.
The plate S Fig. 8 is about the medial lines bent to form a rounded loop, and the
lobes 8 of the plate are also bent along longitudinal lines to form flanges 8' 8ª
and 83 projecting nearly at right angles to the plate, the flanges s¹ to embrace the
shaft, and the flanges 83 and 8³ to be rivetted together as shewn in Figs. 9 and 10.
Instead of forming a socket by bending a plate, it may be a casting in malleable
metal. The wedge W is made with a notch w on its under side, so that when it is
retracted a little, bringing this notch immediately over the edge of the socket at 8*,
the wedge drops, and the blade B is then free to be engaged in the socket or
disengaged therefrom. The small end of the wedge is a little widened forming
slightly projecting shoulders w¹ which, when the wedge is driven back, stop it in
such a position that the notch w drops over the shoulder 8.

page_text: 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 :-
1. The construction of pick or like tool and its attachment to a shaft, sub-
stantially as herein described with reference to the accompanying drawings, that is
to say making the blade and its notched part of wedge section with rounded upper
edge so as to fit into the rounded loop of a socket having flanges that are rivetted
together and embrace the shaft.
2. For securing a pick or similar tool in its socket the construction and use of a
wedge W made with a notch won its under side and stop shoulders w¹, substantially
as herein described.