IMPROVEMENTS IN THE MANUFACTURE OF METALLIC DOWELS
Year: 1883

page_text: LETTERS PATENT to William Dredge Player of the firm of Player Brothers of
Birmingham in the County of Warwick Manufacturers for an Invention of
"IMPROVEMENTS IN THE MANUFACTURE OF METALLIC DOWELS "
PROVISIONAL SPECIFICATION left by the said William Dredge Player at
the Office of the Commissioners of Patents on the 16th February 1883.
WILLIAM DREDGE PLAYER of the firm of Player Brothers of Birmingham in the
County of Warwick Manufacturers "IMPROVEMENTS IN THE MANUFACTURE of
METALLIC DOWELS
"
Metallic dowels to which my invention has reference are principally used for
temporarily uniting or holding together moulding patterns flanges mould and core
boxes leaves of expanding tables and other articles.
The said metallic dowels consist of pegs or pins which are fixed on one part of
the pattern or article and take into holes in the other part of the pattern or
article.
Metallic dowels are ordinarily made of brass by casting or of malleable
cast iron.
My invention consists in making the said dowels by stamping or raising and
cutting from sheet metal by the process or combination of processes hereinafter
described.
In making a metallic dowel according to my invention I proceed as follows:-
I take a circular or other shaped disc or blank of sheet brass or other ductile
metal or alloy and by means of shaping or raising operations effected in a press I
give to the said blank the form of a conical cup the summit or head of the cone
being dome shaped or rounded and having the diameter of the peg or pin of the
dowel to be made. By further shaping or raising operations the conical cup is
first expanded at its base and a tubular figure given to its upper part so as partly
to form the peg or pin and by a further shaping operation the peg or pin is
lengthened and the base part flattened into a disc. There is thus formed the hollow
peg or pin of the intended dowel situated at the middle of the blank. From the
Prins 11

page_text: blank an oblong plate is cat in a press the said plate having about the same width
as the base of the peg. Countersunk holes are afterwards made near the end of
the plate for fixing the dowel by screws to the wood pattern or mould or core box
or other article. A pointed tooth may also be made at one or both of the corners
of each end of the plate for assisting in fixing the dowel to the article.
The conical peg or pin described may be raised from sheet metal without a
connecting plate. In this case the base of the hollow peg or pin may be furnished
with pointed teeth for fixing it to the article or the peg or pin may be otherwise
fixed I prefer however to make the dowel in the manner first described.
The counter plate to be used with the dowel is cut from sheet metal in a press
and the said plate perforated at its middle with a hole of a size proper to receive
the peg of the dowel and also with countersunk holes and teeth or countersunk
holes alone for fixing it to the article.
Metallic dowels made according to my invention in consequence of their uniform
size and figure fit very accurately the counter plates with which they are used they
are also more economically manufactured than dowels of the ordinary kind.

page_text: SPECIFICATION in pursuance of the conditions of the Letters Patent filed by
the said William Dredge Player in the Great Seal Patent Office on the
7th August 1883.
WILLIAM DREDGE PLAYER of the firm of Player Brothers of Birmingham in the
County of Warwick Manufacturers "IMPROVEMENTS IN THE MANUFACTURE OF
METALLIC DOWELS "
Metallic dowels to which my invention has reference are principally used for
temporarily uniting or holding together moulding patterns, flanges, mould and core
boxes, leaves of expanding tables and other articles. The said metallic dowels
consist of pegs or pins which are fixed on one part of the pattern or article and
take into holes in the other part of the pattern or article.
Metallic dowels are ordinarily made of brass by casting or of malleable
cast iron.
My invention consists in making the said dowels by stamping or raising and
cutting from sheet metal by the process or combination of processes hereinafter
described.
In making a metallic dowel according to my invention I proceed as follows;-
I take a circular or other shaped disc or blank of sheet brass or other ductile
metal or alloy and by means of shaping or raising operations effected in a press, I
give to the said blank the form of a conical cup, the summit or head of the cone
being dome shaped or rounded and having nearly the diameter of the peg or pin of
the dowel to be made. By further shaping or raising operations the conical cup is
first expanded at its base and a tubular figure given to its upper part so as partly
to form the peg or pin; and by a further shaping operation the peg or pin is
lengthened and the base part flattened into a disc. There is thus formed the
hollow peg or pin of the intended dowel situated at the middle of the blank. From
the blank an oblong plate is cut in a press, the said plate having about the same
width as the base of the peg. Countersunk holes are afterwards made near the
end of the plate for fixing the dowel by screws to the wood pattern or mould or
core box or other article. A pointed tooth may also be made at one or both of the
corners of each end of the plate for assisting in fixing the dowel to the article.
The conical peg or pin described may be raised from sheet metal without a
connecting plate. In this case the base of the hollow peg or pin may be furnished
with pointed teeth for fixing it to the article; or the peg or pin may be otherwise
fixed. I prefer however to make the dowel in the manner first described.
The counter plate to be used with the dowel is cut from sheet metal in a press
and the said plate perforated at its middle with a hole of a size proper to receive
the peg of the dowel and also with countersunk holes and teeth or countersunk
holes alone for fixing it to the article.
Metallic dowels made according to my invention in consequence of their uniform
size and figure fit very accurately the counter-plates with which they are used;
they are also more economically manufactured than dowels of the ordinary kind.
I will now proceed to describe with reference to the accompanying Drawing the
manner in which my invention is to be performed.
Figure 1 represents in plan and edge view the circular disc or blank of sheet
brass or other ductile sheet metal which I use for the manufacture according to my
invention of a metallic dowel, but other shaped blanks may be used. I take the
said blank or disc Figure 1 and by a series of shaping or raising processes operate
upon the said blank in the manner represented in section in Figures 2, 3 and 4 so
as to produce the nearly conical cup Figure 4, the head of the cup being dome
shaped or rounded and having nearly the diameter of the peg or pin of the dowel
to be made. By further shaping or raising operations the cup Figure 4 is first
expanded at its base and a tubular figure given to its upper part as represented in
section in Figure 5 and afterwards made to take the form represented in section in

page_text: Figure 6 and plan in Figure 7. By the last described operations the peg or pin of
the partly made dowel is completed and the base part flattened into a disc, the peg
or pin being situated at the middle of the disc. In the said Figures 6 and 7 the
peg or pin of the dowel is marked a and the base or disc is marked b. From the
circular base part b an oblong plate is cut as indicated in dotted lines in
Figure 7 the said plate having a width a little greater than that of the base of the
peg a.
Figure 8 represents in end elevation; Figure 9 in side elevation and Figure 10
in plan, the partly made dowel after the oblong plate marked c has been cut from
the circular disc 6 Figures 6 and 7. In the said oblong plate c countersunk
holes d, d Figure 11 are next made for fixing the dowel by screws to the wood
pattern or mould box or other article. For the purpose of assisting in fixing the
dowel to the article, a pointed tooth may be made at the corners of the plate cas
represented at o, e Figures 12 and 13. Or the same object may be attained by
making a circular tooth or cutting edge around each of the countersunk holes d, d
on the underside of the base plate c as represented in Figure 14 and marked f. f.
Although I prefer to make the peg or pin a of the dowel with a base or con-
necting plate cas represented in the drawing, yet the peg or pin a may be made
without a base plate. The peg or pin in this modification is connected to the
article by making pointed teeth at the base of the peg or pin which teeth are
forced by pressure into the article so as to fix it in its place. Or the said peg or
pin may be otherwise fixed to the article.
In manufacturing the counter plate to be used with the dowel, I cut from sheet
-metal an oblong blank Figure 15 and form countersunk holes in it as represented
in Figure 16 and finally perforate the blank at its middle with a hole gas repre=
sented in Figure 17, the said hole having a size suitable to receive the peg a of the
dowel.
In addition to the countersunk holes for fixing the counter plate to the pattern
or other article, the said counter plate may be provided with pointed teeth at its
corners of the kind represented on the dowel plate Figures 12 and 13; or with
circular teeth or cutting edges around the countersunk holes of the kind represented
on the dowel plate Figure 14.
A
Figure 18 represents the manner in which dowels made according to my invention
are used; h is one part of the moulding pattern or other article to be temporarily
connected to the other part i. On the part h the peg or pin a of the dowel is
fixed by its plate c and on the part the counter plate kis fixed, through the
hole g in which counterplate the peg or pin a of the dowel passes as represented.
Having now described the nature of my invention and the manner in which
the same is to be performed I wish it to be understood that I claim as my
invention; The improvements in the manufacture of metallic dowels herein
before described and illustrated in the accompanying Drawing; that is to say,
making dowels of the kind described by shaping or raising or by shaping or raising
and cutting from sheet metal by the process or combination of processes substantially
as herein before described and illustrated.
In witness whereof I the said William Dredge Player -have hereunto set my
hand and seal this third day of August in the year of our Lord one
thousand eight hundred and eighty three.
Witness, BARON R WALKER
Brass founder.
Birmingham.
WILLIAM DREDGE PLAYER (L.S.)