provements in Machinery for Forming Heads of Bolts and other like Articles.
Year: 1890

page_text: Date of Application, 24th Nov., 1890
Complete Specification Left, 24th Aug., 1891-accepted, 17th Oct., 1891
PROVISIONAL SPECIFICATION
Improvements in Machinery for Forming Heads of Bolts and other
like Articles.
I, JAMES HOLLINGWORTH, of Dobcross, in the County of York, Power Loom
Maker, do hereby declare the nature of this invention to be as follows (which
invention has been communicated to me from abroad by George Webb, of
Pawtucket, Rhode Island, one of the United States of America, Engineer) :-
This invention relates to machinery for forming the heads of bolts (previous to
being pressed or squeezed into the finished shape) commonly known as the
"bunted head; one object of my invention in such machinery being to adjust
the striking hammer so as to increase or reduce the length of iron presented to
the hammer at each stroke when bunting or stocking the head. It is common
knowledge that when there is too much shank or length of iron between the die
and the end of the striking hammer, that the shank is liable to be bent by the
stroke of the hammer, in which case the head is liable to be formed eccentrically
on the shank of the bolt. To prevent this 1 adjust the horizontal position of the
hammer by means of a set screw or other device so as to leave more or less space
between the striking end of the hammer and the die which permits more or less
metal or stock to be put into the lead so that instead of presenting to the hammer
all the shank of the bolt necessary to form the head, I present as much of the
shank as will take two, three, or other number of blows to stock the head according
to the amount to be put therein; if, therefore, the head of a bolt be formed by
two or three blows of the hammer, it will be necessary to present to the said
hammer for each blow, about one half or one third respectively of the total length
of shank to be bunted or stocked, according to the size of head about to be made,
by which means all possibility of the head being formed out of centre with the
shank is now removed. By the adjustment of the hammer I am also enabled to
form heads of varying sizes from the same thickness of shank.
Dated this 22nd day of November 1890.
TASKER & CROSSLEY,
Halifax and Huddersfield, Agents:
COMPLETE SPECIFICATION.
Improvements in Machinery for Forming Heads of Bolts and other
like Articles.
I, JAMES HOLLINGWORTH, of Dobcross, in the County of York, Power Loom
Maker, 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 (which invention has been communicated to me from abroad
by George Webb, of Pawtucket, Rhode Island, one of the United States of
America, Engineer):
:-
This invention relates to machinery for forming the heads of bolts (previous to
being pressed or squeezed into the finished shape) commonly known as the
"bunted head the object of my invention in such machinery being to adjust
the striking hammer so as to increase or reduce the length of iron presented to the
hammer at each stroke when bunting or stocking the head.
It is common
knowledge that when there is too much shank or length of iron between the die
and the end of the striking hammer, that the shank is liable to be bent by the stroke
of the hammer. in which case there is danger of the head being formed eccentrically

page_text: on the shank of the bolt. To prevent this I adjust the horizontal position of the
hammer by means of a set screw or other device so as to leave more or less space
between the striking end of the hammer and the die which permits more or less
metal or stock to be put into the head of the bolt.
Such being the nature and object of my said invention, I will now describe the
same with reference to the accompanying sheets of drawings wherein
Fig. 1. is outline elevation of an upsetting or bolt making machine having my
improvements applied thereto; and
Fig. 2. is plan view of the same.
A represents the plunger which is made to reciprocate backwards and forwards
in the ordinary manner for the purpose of striking the horizontal hammer B which
forms the head of the bolt by the blows it gives to the bar of iron C. This
hammer B is free to slide within pedestals or heads D and it is forced against the
heated bar of iron C by the plunger A, but the hammer is withdrawn from the bar
of iron by the flat steel spring E which acts against the collar fixed to the said
hammer. My invention consists in providing means whereby the hammer B can
be adjusted with respect to the distance lying between the striking end of the
hammer a and the dies b. The means I employ for increasing or diminishing the
space between the points a and b consists in the set screw G which can be screwed
further in or out of its position so as to shorten or lengthen the distance between
the point a of the hammer and the dies as is obvious, and as the end of the heated
bar of iron is always placed against the end of the hammer a the length of metal
between the two points a and can be thus regulated so that instead of presenting
to the hammer all the shank of the bolt necessary to stock and form the head all
at once, present as much of the shank as will take two, three or other number
of blows to stock the head according to the amount to be put therein; for
instance, if the head of the bolt is to be formed by two or three blows of the
hammer, present to the said hammer for each blow about one half or one third
respectively of the total length of shank to be bunted or stocked, according to the
size of the head to be made, by which means all possibility of the head being
formed out of centre with the shank is removed.
By the adjustment of the hammer as described I am also enabled to form the
hends of varying sizes from the same thickness of shank, which has hitherto not
heen practicable.
Having now particularly described and ascertained the nature of my said inven-
tion, and in what manner the same is to be performed, I declare that what I
claim is
―
In machinery for bunting and stocking the heads of bolts, the adjustment of
the hammer B by set screw or other equivalent device, substantially as herein
described.
TASKER & CROSSLEY,
Halifax and Huddersfield, Agents.