Improvements in Machinery for Trimming and Chamfering Nuts.
Year: 1891

page_text: Date of Application, 25th June, 1891
Complete Specification Left, 21st Mar, 1892-Accepted. 23rd Apr., 1892
PROVISIONAL SPECIFICATION.
Improvements in Machinery for Trimming and Chamfering Nuts.
I, EDWARD HOLLINGWORTH, of Dobcross Ironworks, 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, in the County of Providence, in the State of Rhode Island,
one of the United States of America, Engineer):
:-
This invention has reference to that class of machine or press employed for
giving a supplementary trimming and chamfering to nuts, for the purpose of
making all the sides thereof smooth and of equal size and shape. This is
accomplished by placing the said nut over an opening or die of the required
shape, the nut being then pressed or forced down into the said opening by means
of a vertical plunger, the parts of metal which have been scraped off the mut by
the trimming remaining upon the upper surface of the die, which particles of
metal have hitherto had to be removed by the operator before another nut could
be operated upon, otherwise the said uut would not be placed with accuracy over
the die.
To remove the particles of metal left upon the surface of the die is the object
of this invention, and this is accomplished by means of a moving bar or wiper,
metal brush, or other suitable device, which is caused to sweep over the die each
time the plunger is raised after trimming. The wiper is made to move over the
surface of the die for the purpose of removing the loose particles of metal by
means of a lever operated by a cam from the main shaft of the machine, or from
any other convenient moving part thereof, whilst a flat steel spring returns the
wiper to its former position.
By the employment of the self-acting wiper, which is timed to operate self-
actingly after each upward movement of the plunger, the operator can place a nut
upon the die at every revolution of the machine, which was impossible for him to
do when he had to remove the trimmings, by which means a considerably larger
number of nuts can be trimmed in a given time than formerly.
Dated this 94th day of June 1891.
TASKER & CROSSLEY,
Huddersfield, Agents.
COMPLETE SPECIFICATION.
Improvements in Machinery for Trimming and Chamfering Nuts.
1, EDWARD HOLLINGWORTH, of Dobcross Ironworks, 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 com-
municated to me from abroad by George Webb, of Pawtucket, in the County of
Providence, in the State of Rhode Island, one of the United States of America,
Engineer):
:-
This invention has reference to that class of machine or press employed for
giving a supplementary trimming and chamfering to nuts, for the purpose of making
all the sides thereof smooth and of equal size and shape. This is accomplished by
placing the said nut over an opening or die of the required shape, the nut being
then pressed or forced down into the said opening by means of a vertical plunger,
the parts of metal which have been scraped off the nut by the trimming remaining

page_text: upon the upper surface of the die, which particles of metal have hitherto had to
be removed by the operator before another nut could be forced into the die other-
wise the said nut would not be placed with accuracy over the said die.
To remove the particles of metal left upon the surface of the die is the object of
this invention, and this is accomplished by means of a moving bar or wiper, metal
brush, or other suitable device, which is caused to sweep over the top of the die
each time the plunger is raised after trimming.
Such being the nature and object of my invention I will now proceed to describe
the same more fully and to shew how my invention may be put into practical
operation.
In the accompanying sheet of drawings
Fig. 1 represents a side clevation of the upper portion of a machine used for
trimming and chamfering nuts having my improvements applied thereto, and
Fig. 2 is a plan of the improved parts.
A represents the standard or framework of the machine and B a trimming tool
or instrument receiving an up and down motion from the connecting rod C which
is mounted eccentrically on the main driving shaft D. The die shewn in plan view
at E onto the top of which the operative places a nut (forged or otherwise
manufactured) after which the trimming tool B descends forcing the said nut into
the die, such operation causing a deposit of small particles of metal to be left upon
the upper surface of the die which, as already stated, had to be removed by the
hand of the operative; but according to my invention these particles of metal are
removed automatically by the action of the machine in the following manger.
G represents a lever mounted upon the vertical shaft H upon the top of which
shaft is a lever arm or finger I operated at the right time by means of a cam J
attached to revolving disc L mounted upon the main driving shaft D.
It will
therefore be seen that immediately after the trimming tool is withdrawn from the
die that the lever or wiper G is made to pass over the surface of the die in one
direction so as to clear or sweep off the loose particles of metal left thereon by
the chamfering operation, but the wiper is brought back or operated in the opposite
direction by the steel spring K thus the movement of sweeping away the metal
and the returning of the lever being performed whilst the trimming tool is making
its upward and downward stroke time being also given for the operative to place
another nut upon the surface of the die. The wiper G may consist of a brush or
other suitable instrument.
a
By the employment of the self acting wiper, which is timed to operate self
actingly after each upward movement of the trimmer, the operative can place
nut upon the die at every revolution of the machine which was impossible for him
to do when he had to remove the trimnings, by which means a considerably larger
number of nuts can be trimmed in a given time than formerly.
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 a machine for trimming and chamfering nuts, the application thereto of a
moving instrument such as G, for removing particles of metal from the surface of
the die, arranged and operated substantially in the manner herein shewn and
described.
TASKER & CROSSLEY,
Huddersfield, Agents.