An Improved Tool for Rounding the Ends of Screwed Studs when Fixed in Place.
Year: 1893

page_text: Date of Application, 20th Feb., 1893
Complete Specification Left, 13th Nov., 1893—Accepted, 16th Dec., 1893
PROVISIONAL SPECIFICATION.
An Improved Tool for Rounding the Ends of Screwed Studs when
Fixed in Place.
I, WALTER PAYTON of 138 Sheen Road Richmond in the County of Surrey
Engineer do hereby declare the nature of this invention to be as follows:-
The body of the said tool is formed cylindrically and has its centre bored out
from end to end and its lower part screwed to fit the screwed portion of the stud
the end of which has to be rounded by the tool. The boring above the screwed
part is enlarged in diameter and within it is accurately fitted a cylindrical spindle a
part of which is reduced. and has fitted upon it a cylindrical sleeve of equal
diameter with the spindle and such sleeve and spindle are so fitted as to be capable
of being freely moved up or down within the body. A part of the exterior of the.
body is screwed and upon such screwed part is fitted a collar in such a way as will
permit of the collar being screwed up or down upon the body. The upper end of
the collar is bored out to enable the reduced part of the spindle to freely pass
through it but not so as to allow of the end of the sleeve doing so, and the upper
end of the spindle has a stop piece so fitted upon it as to prevent the sleeve having
end motion upon the spindle. The sleeve is provided with a pin or feather
projecting into a groove formed in the interior of the body in order that the sleeve
may be prevented turning round within it and the arrangement of the several
parts in relation to each other is such that when the collar is screwed up or down
upon the body, the spindle will be moved up or down within it and at the same
time be capable of being rotated within the body.
The lower end of the spindle is slotted across its centre and is fitted with a
tempered steel cutter the cutting edge of which is shaped to the curve required to
be given to the end of the stud, and the upper end of the spindle is formed into a
shank of any kind that will enable it to be rotated by a drilling or other suitable
machine or the spindle may have fitted upon it a spanner winch, ratchet lever, or
other suitable means for giving rotation to the spindle by hand.
'
In order to round the end of a stud with the said tool the body is screwed upon
the screwed end of the stud and the collar rotated till the cutter in the spindle is in
contact with the stud. The spindle is then caused to revolve and the collar is
turned for the purpose of pressing the cutter down upon the end of the stud, and
thereby round it and also reduce it to the length desired. The shavings as they
are formed pass out of the body through openings formed in the sides of it. When
the tool is rotated by a drilling or similar machine the cutter may be fed up to
its work by means of the feed motion belonging to the machine if doing so should
be preferred in which case the screwed collar and the sleeve above described may
be dispensed with.
Dated this 10th day of February 1893.
COMPLETE SPECIFICATION.
An Improved Tool for Rounding the Ends of Screwed Studs when
Fixed in Place.
I, WALTER PAYTON of 138 Sheen Road Richmond in the County of Surrey
Engineer, 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 :-
Reference being had to the accompanying sheet of drawings of which
Figs. 1. 2 are elevations, Figs. 3. 4 vertical sections, Fig. 5 a horizontal

page_text: section on line A and Figs. 6. 7. separate illustrations of the sleeve c shown
in Fig. 3.
In carrying the said invention into effect the body a has its upper part bored out
cylindrically and has fitted within it the spindle b and the sleeve c the latter of
which is fitted upon the reduced part b¹ of the spindle 6 and is provided at c¹ with
a pin which projects into a small groove formed in the body at a" and prevents the
sleeve turning round within it.
.
The lower part of the body a is bored out and screwed at a the length required
to suit the sized stud the tool is intended to round and it is flattened on two of its
sides in the manner shown by Figs. 1. 2. 3. 5. to enable it to be turned by a spanner
it is also provided with openings at as a through which shavings may escape as
they are cut from the stud.
The exterior of the upper part of the body is screwed as shown by Fig. 3. and
has fitted upon it the socket d which is formed into a collar at d' through which
passes the upper part 6¹ of the spindle b and the socket has a small hole bored in
it at d² and the sleeve c is grooved at ³ ³ to enable the spindle b to be conveniently
lubricated.
The spindle b is squared at 63 and has fitted upon it the winch e which is secured
upon the spindle by a nut screwed upon it at 6 and the loose washer is placed
between the winch and the sleeve c to prevent end motion of the sleeve upon the
spindle.
The lower part of the spindle has a slot formed in it at 64 and the slot has fitted
within it the tempered steel plate h secured in position by the screw h¹ and having
its lower edge projecting from the slot and formed into a cutter of the shape
required to give the desired degree of roundness to the stud after the manner
shown by Figs. 3. 4.
In rounding the end of a stud the body a is screwed upon the stud in the manner
shown by Fig. 3. and the cutter h is lowered till in contact with the stud by turning
the socket d. The spindle b is then revolved by means of the winch e and the
socket turned slowly and as required to feed the cutter down to its work and till
the collar d¹ is in contact with the upper end of the body a at which time the tool
will be as represented by Fig. 3. and the stud will have been reduced to the length
required to suit it to its appropriate nut.
b
In place of the winch e the spindle 6 may be turned by an ordinary double-
ended wrench or it may have a ratchet-lever device of the usual kind fitted upon it
for that purpose, but when it is desired to revolve it by means of a drilling
machine the body a is made as shown by Figs. 2. 4. the sleeve the socket d
the winch e and the washer and the nut 6 are dispensed with and the spindle is
formed with a shoulder at 6 and a shank which may be tapered as illustrated by
Fig. 4 or formed in the manner shown by Fig. 5 in order that it may fit and be
revolved by the tool holder described in the Specification of my Letters Patent
for the United Kingdom No. 2355 A.D. February 9th 1891.
When constructed in the manner shown by Figs. 2. 4. the cutter h is fed
down to its work by the feed motion of the drilling machine in the ordinary
way.
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.
b
.4
1st. The spindle 6 containing the cutter h, the sleeve c, the washer g, the winch e
and the screwed socket d so arranged and combined as to enable the spindle b to 5
be revolved by the winch e and moved by the screwed socket d up or down within
the body a in order that the end of a stud upon which the body a is screwed may
be rounded by the cutter substantially as herein described with reference to the
accompanying Figures 1. 3. 5. 6. 7.
2nd. The combination of parts illustrated by Figures 1. 3. 5. 6. 7. but having an 5
ordinary wrench or ratchet-lever applied to the spindle 6 in place of the winch e

page_text: 3rd. The body a and the spindle & containing the cutter / in combination with a
drilling or other machine suitable for giving rotary motion to the spindle 6 within
the body a for the purpose herein set forth and described with reference to
Figures 2. 4.
Dated this 13th dow of November 1893
WALTER PAYTON.