An Improved Manufacture of Heads of Dogs or Spikes for Securing Rails and the like.
Year: 1898

page_text: Date of Application, 3rd Oct., 1898
Complete Specification Left, 18th May, 1899-Accepted, 24th June, 1899
PROVISIONAL SPECIFICATION.
An Improved Manufacture of Heads of Dogs or Spikes for Securing
Rails and the like.
I, PAUL VON DER BECKE, of Dortmund, in the Empire of Germany, Manufacturer,
do hereby declare the nature of this invention to be as follows:-
This invention relates to the manufacture of heads for dogs or spikes for rails,
more particularly to spikes with lateral lugs called dog-ears. Hitherto all such
dogs have been manufactured from heated metal and it was impossible with
the machines hitherto available to press the heads of such dogs when the metal
was in a cold state. The invention chiefly consists in rendering it possible to
provide the spike with lateral lugs or dog-ears during pressing by means of
specially combined and constructed press-devices and special manipulations. This
is effected substantially as follows:-
The bar or iron rod, out of which the dogs are to be manufactured, is pressed
by means of a press or device similar to that used in manufacturing rivets by the
cold process, by means of a stanip stepped off on the outside for forming lateral
lugs or dog ears, and with a recess inside for stamping the metal into a die made
in two sections and also provided with recesses.
A stamp is provided with a recess serving to form the upper portion of the head
of the dog. The die co-operating with the stamp is made in two parts and consists
of two jaws between which the material is placed or clamped. To form the head,
the stamp presses the material at the end or head of the rod into a recess of one
of the dies corresponding fo the lower portion of the head of the dog. The upper
portion of the head is formed by the stamp itself provided with a corresponding
recess. The die is also constructed so that the jaw or part surrounding the back
portion of the bar is higher than the front portion. This is done in order to hold
fast the back of the dog and to prevent the material required for the formation
of the lugs or ears, from being pressed towards the back. This material required
for the lugs or ears is now pressed into hollow grooves of the two part die where
it is free to expand for the purpose of forming the ears.
By this new process and the use of the devices described it is rendered possible
to manufacture in a cold state heads of dogs with exactly the same lateral lugs
or ears as those possessed by dogs manufactured by the hot process. The stem
of the dog is of the same thickness throughout, that is to say down to the lower
edge of the lugs or ears, or to about half the height of the head, which is
advantageous in so far that when a dog is to be removed the stem will be com-
pletely surrounded by the bolt-extractor, pushed under it from the back of the
head, and the dog can thus be easily withdrawn.
Dated this 3rd day of October 1898
BOULT & WADE,
Agents for the Applicant.

page_text: COMPLETE SPECIFICATION.
An Improved Manufacture of Heads of Dogs or Spikes for Securing
Rails and the like.
I, PAUL VON DER BECKE, of Dortmund, in the Empire of Germany, 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:-
This invention relates to the manufacture of heads for dogs or spikes for rails,
more particularly to spikes with lateral lugs called dog-ears. Hitherto all such
dogs have been manufactured from heated metal and it was impossible with
the machines hitherto available to press the heads of such dogs when the metal
was in a cold state. The invention chiefly consists in rendering it possible to
provide the spike with lateral lugs or dog-ears during pressing by means of
specially combined and constructed press-devices and special manipulations. This
is effected substantially as follows:-
The bar or iron rod, out of which the dogs are to be manufactured, is pressed
by means of a press or device similar to that used in manufacturing rivets by the
cold process, by means of a stamp stepped off on the outside for forming lateral
lugs or dog ears, and with a recess inside for stamping the metal into a die made
in two sections and also provided with recesses. The head of the dog receives
in this operation the shape illustrated in Figures 1 and 2 of the accompanying
drawing. The other two figures show the tools employed for carrying the
manufacture into effect. A stamp A is provided with a recess serving to form
the upper portion of the head of the dog. The die co-operating with the
stamp is made in two parts, and consists of two jaws B and 12 between
which the material is placed or clamped. To form the head, the stamp
presses the material at the end or head of the rod into a recess C of one of the
dies B corresponding to the lower portion of the head of the dog. The upper
portion of the head is formed by the stamp itself provided with a corresponding
recess D. The die is also constructed so that the jaw or part B1 surrounding the
back portion of the bar is higher than the front portion B2. This is done in order
to hold fast the back of the dog and to prevent the material required for the
formation of the lugs or ears from being pressed towards the back. This material
required for the lugs or ears is now pressed into hollow grooves b of the two-part.
die B B², where it is free to expand for the purpose of forming the ears.
By this new process, and the use of the devices described, it is rendered possible
to manufacture in a cold state heads of dogs with exactly the same lateral lugs
or ears as those possessed by dogs manufactured by the hot process. The stem
of the dog is of the same thickness throughout, that is to say down to the lower
edge of the lugs or ears, or to about half the height of the head, which is
advantageous in so far that when a dog is to be removed the stem will be com-
pletely surrounded by the bolt-extractor, pushed under it from the back of the
head, and the dog can thus be easily withdrawn.
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
J claim is:
"
1. The process for manufacturing heads of dogs or spikes with dog-ears for
securing rails and the like characterised by the head being pressed when cold out
of an iron rod or bar in a suitable die by means of a stamp and in acforward

page_text: direction, lateral lugs or ears being simultaneously produced by the same stamp.
substantially as described.
2. A device for carrying into effect the process set forth in Claim 1 consisting
of a die, characterised by the portion of the head free from lugs or cars being
formed between the stamp and one part B2 of the die in corresponding recesses
of said parts, the portion of the head provided with lugs or ears being formed
between the stamp, which is stepped off flat at this point, and a die-part B¹
correspondingly higher, relatively to the part B³, and provided with lateral
recesses for the ears or lugs pressed into them, substantially as described.
3. The combination and arrangement of parts for forming heads of dogs or
spikes for securing rails and the like substantially as described and illustrated in
the accompanying drawings.