IMPROVEMENTS IN THE PRODUCTION OF SCREW-HEAD SOCKETS
Year: 1885

page_text: I, CHARLES SHOWELL of the Firm of Edwin Showell and Sons of Lower
Loveday Street, Birmingham, in the County of Warwick, Manufacturer do hereby
declare the nature of said invention for "IMPROVEMENTS IN THE PRODUCTION OF
SCREW-HEAD SOCKETS" and in what manner the same is to be performed, to be
particularly described and ascertained in and by the following statement:—
My invention consists of the improvements hereinafter described in the manu-
facture or production of sockets for the heads of screws.
By my invention, the manufacture of the said sockets is much simplified and
economized-This I effect by taking a cylindrical block, cut from a plate of brass
or other suitable metal or alloy, and which said block or thick blank is subsequently
operated upon by tools, and fashioned into a screw-head socket.
I will now proceed to describe with reference to the accompanying Drawing, the
manner in which the same is to be performed.
Figure 1 represents in plan, figure 2 in side elevation, and figure 3 in section, a
socket for a screw head made according to my invention-Figure 4 is a plan and
figure 5 is an edge view of the blank froin which the said socket is made-Figure
is a section and figure 7 a plan of a partially formed socket which is subsequently
formed into a finished socket; thus in carrying out the manufacture, I take a blank
figure 4 of about the size in plan of a socket to be formed, but of a thickness a
little less than the depth of a socket to be made; and within the middle of the
blank, I sink by tools and pressure a cavity, or inclined countersunk a, as best seen
in the section figure 6-The metal displaced in the formation of this cavity raises
the height of the walls of the partially formed socket-The closed bottom of the
blank figures 6 and 7 is cut out by tools worked in a stamp or press thus making
a passage with parallel sides, which are marked 6-The inclined part a forms the
seat for the screw head, while the cut out part b forms a passage through which
the neck under the head of the screw takes.
The tapering and the milling of the sides or edges of the socket is produced by
the shape of the die wherein the socket is fashioned, in the sinking and piercing
processes-Or the shaping and milling may be effected by an after process-The
millings are marked c.
Instead of producing the socket from wrought metal, I take a cast blank d
figure 8, and place it in a die of the exact shape to be given to it. and also hv

page_text: means of a tool f of the the exact internal shape of the socket, the rough cast
blank d is pressed into the exact form required-The combined pressures of the
die and tool removes all roughness from the sides of the blank, and gives the socket
the shape required.
'
By my invention, screw sockets are uniform in size, cheaply manufactured and
neat in appearance.
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
First. Making screw-head sockets from thick cylindrical blanks by first sinking
a conical cavity within the blanks and subsequently piercing the bottom thereof,
the shaping and fashioning being conducted and carried out substantially as
described and illustrated in figures 1 to 7 both inclusive of the accompanying
Drawing.
Secondly. The production of screw-head sockets by shaping and finishing cast
blanks by means of dies, tools and pressure, substantially as described and set forth
in figure 8 of the accompanying Drawing.