Improvements in Holders for Drilling, Tapping, and similar Tools, applicable also for Securing Studs in Place.
Year: 1893

page_text: Date of Application, 13th Feb., 1893
Complete Specification Left, 13th Nov., 1893-Accepted, 27th Jan., 1894
PROVISIONAL SPECIFICATION.
Improvements in Holders for Drilling, Tapping, and similar Tools,
applicable also for Securing Studs 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 said invention relates to the tool holder for which I was granted Letters
Patent for the United Kingdom on February 9th 1891 No. 2355, and it consists
of certain improvements whereby the reversing device of the said holder is
rendered more automatic in its action and also in some modifications.which enable
the very useful plan of employing separate springs for taps of varying sizes
described in the Specification and illustrated in the drawings of the above
named Letters Patent to be also applied to similar holders which have no reversing
action.
In regard to the first part of the said invention the sleeve c described & illus-
trated in the Specification & drawings of the said Letters Patent has pivoted upon
it a weighted or spring moved detent so arranged in relation to the lever e and the
wheel d carried by the said sleeve that when the lever has been so moved as to
allow of the wheel & turning upon its axis in the manner and for the purpose
described one part of the said detent will act as a stop to prevent any further
motion of the lever and another part of the detent will engage with the device
provided for stopping the rotation of the sleeve c after the manner described in the
said Specification.
The addition of the said detent enables the holder when revolving in one
direction to automatically reverse the motion of the tap contained in it whenever
the tap has bottomed in the hole or otherwise ceased to turn with the holder. In
order that the parts of the holder may be again put in position for tapping a hole
the sleeve
P.
shown in Fig. 1. of the aforesaid drawings has substituted for it a
lever or other suitable device so arranged as to permit of the detent being moved
by it back to its original position where it will no longer act as a stop to the
lever e.
In the modifications of the said holder forming the second part of the said
invention the sleeve c and all the parts contained in it are dispensed with the
parts a and b have rectangular flanges formed upon them in place of the toothed
wheels a' and ' and the pin a' is screwed into a for the purpose of more securely
connecting the parts a and b together. The flange upon a has a cast steel faceplate
fixed upon it and such faceplate and the face of the flange upon b lie in contact
with but so as to be free to move one upon the other.
The part b is recessed to receive the pin g³ upon which the helical spring 9 is
mounted and the recess is so formed that one of its ends acts as an abutment to the
spring 9 and its other end permits of the rectangular end of the pin 9 passing
through the flange upon & and into a notch cut in the steel plate connected to a such
notch being angled upon one of its sides.
The spring g is so mounted upon the pin g³ as to enable the spring to con-
tinuously press the rectangular end of the pin into the notch of the steel plate.
The angle given to the side of the notch is just sufficient to allow of the part a
when turning to press the ping out of the notch at such times as the tap has
bottomed in a hole or the part a is from any other cause unable to give motion to
the part without breaking the tap.

page_text: The tapping and other stocks and tools to be used in combination with the part b
are the same as, or similar to those described and illustrated in the Specification
and drawings of the above recited Letters Patent.
Dated this 11th day of February 1893.
COMPLETE SPECIFICATION.
Improvements in Holders for Drilling, Tapping, and similar Tools,
applicable also for Securing Studs 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 2 sheets of drawings which illustrate
substantially the improved holder for drilling tapping and similar tools applicable
also for securing studs in place for which Letters Patent for the United Kingdom
were granted me on February 9th 1891 No. 2355 with the said improvements as
herein described added thereto.
In the said 2 sheets of drawings Figs. 1, 2, 3 are elevations Figs. 4, 5 vertical
sections, Fig. 6 a horizontal section on line A B Fig. 4. Fig. 7 a plan of the ring y
shown in Figs. 2, 4. Fig. 8 an elevation of the side A of the sleeve c Fig. 4.
Fig. 9 a plan of Figs. 3, 5. Fig. 10 a section on line C Fig. 5. Fig. 11 a section
on line D Figs. 3, 5. Figs. 12, 13 illustrate the notched plate shown in Figs. 3, 5.
Fig. 14 illustrates separately the mitre wheel d shown in Figs. 2, 4, 6, 8, 15.
Fig. 15 shows the position of parts of the said holder when its motion has been
reversed and Fig. 16 illustrates a convenient stock for containing twist drills such
stock being also shown in place in Fig. 1.
In Fig. 1 the holder is shown as arranged for drilling. Figs. 4, 5 show it as
prepared for tapping and Figs. 2, 3 represent it as arranged for fixing studs in
place.
In carrying into effect the first part of the said invention the axis c¹ of the sleeve c
has fixed upon it the collar e upon which is fitted the detent vas illustrated by
Figs. 2, 4, 6, 8, 15 and the detent v is formed with a square hole in which is fitted
the sliding bar notched on its side in order that it may engage at v² with a
notched part of the collar c in the manner shown by Fig. 2.
The lower end of the bar is screwed and has fitted upon it the adjusting nut v
between which and the detent v is placed the helical spring of the purpose of which
is to cause the bar o to exert pressure upon the detent and thereby cause the
detent to partially rotate upon its axis.
Fig. 4 illustrates the holder as fixed for work in the end n of the spindle of a
drilling or other machine used for rotating the holder and between the upper part
of the holder and the end of the spindle is fitted in the manner shown by Fig. 4,
the ring y which has its side bored out to receive the axis of a lever y' held in the
position shown in Figs. 2, 7 by the flat end of the pin y pressed against it by the
helical spring y in the manner shown in the said Figs. 2, 7.
The ring y is formed with a projection provided with an eye at y' into which is
hooked one end of a chain the other end of which is secured in any convenient
manner to the saddle or other part of the drilling machine. The purpose of the
said chain is to prevent the ring y being rotated when the spindle » is in motion and
its length should be approximately the length of the travel of the spindle and its
fixed end y should be located on a line about the centre of such travel. When the
bar dis in contact with the end of the lever e² as shown in Fig. 2 and rotation of
the wheel d is thereby prevented the detent is held in the position shown by Fig. 2
by the projection formed upon it at ' and its helical spring is then in compression,

page_text: But when the bar & has forced up the lever e which it will do when a tap or
stud has bottomed in a hole or is otherwise prevented rotating the detent will be
instantly turned by its spring into the position shown by Fig. 15 where the projec-
tion will hold the lever e away from the bar d and allow the wheel d to revolve
and bring the part of the detent into contact with the lever y' in the manner illus-
trated by Fig. 15. When the detent is in this position the rotation of the sleeve
c is arrested and the wheel d is at liberty to turn upon its axis and give motion to
the lower part of the holder in a reverse direction to that of its upper part.
0
v
By turning the lever y' downward through a small distance, as shown by Fig. 15
the detent the lever and the bar d2 will again assume the positions shown in
Fig. 2 and the lever y' when released will also be turned into the normal position
shown by Figs. 2, 7 by the pressure of the helical spring y. The ring y and parts
connected to it form a convenient device for arresting the rotation of the sleeve e
when the holder is rotated by an ordinary drilling machine but it is not essential
for that purpose but may be varied as required when the holder is rotated by
machines of other kinds.
In order that the said holder may be adapted for use in a drilling or other
machine which has a reversing motion and be enabled to use separate springs for
taps of differing sizes in the manner described in the Specification and drawings of
the above recited Letters Patent, the said holder is modified in the following
manner. The parts a and b are coupled together in the manner shown by Fig. 5
but the mitre wheels upon such parts and the sleeve c together with all the parts
connected to it are entirely dispensed with and in lieu of the sleeve c the tempered
steel plate is placed between the parts a and b and such plate is firmly connected
to the part a by studs as shown in Figs. 5, 12.
The plate is notched at æ¹ to receive the squared end g of the tempered steel
pin g and the other end of the pin is fitted into a notch cut in a bracket formed
upon the part at Figs. 5, 11.
b
The pin g has fitted upon it the sleeve g' which has its outer side screwed and is
fitted with the adjusting ring g' and the other end of the pin g³ has fitted upon it
the washer g'.
The helical spring g is placed between the washer 93 and the ring 9' and the
ping has a pin screwed into it at 9 which lies in a slot cut in the sleeve g' and
prevents the sleeve turning upon the pin g' or being thrust off the pin by the
pressure of the spring g.
The notch a' in the plate x is inclined on one of its sides in the manner shown by
Figs. 3, 12, 13, and when the pin g³ with the parts carried by it is placed in position
as shown by Figs. 3, 5 the part a will compel the part 6 to rotate with it till such
times as the resistance set up by the operation of tapping or studding a hole is
greater than the pressure exerted upon the pin by the spring g in which case the
inclined side of the notch ¹ will press the squared end of the pin g³ out of the notch
and allow the part a to continue its rotation without giving motion to the part bor
the tap or other tool contained in it. The part bis recessed so as to receive the
lever which is held in the recess by the screw-pin 68 and pressed out of it by the
spiral spring in the manner shown by Fig. 11. the purpose of the said lever being
to hold the pin g when placed in the notches x 6.
A separate pin with the parts carried by it is provided for each sized tool but
the strength of the spring g is made to correspond with such sizes and when such
springs have been correctly adjusted by turning the ring 9 the pins may be quickly
placed in position when a tool is changed for one of another size and the frequent
adjusting required when one spring only is provided for a considerable number of
tools of varying sizes will be entirely avoided.
Fig. 16 illustrates a stock which may be employed for carrying drills having
taper shanks and Fig. 1 shows such stock in position in the holder but similar
stocks may be provided suitable for containing tools with cylindrical or other kinds
of shanks,

page_text: 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
1st. The addition to the holder the subject of my above recited Letters Patent of
the sleeve the detent the bar the spring and the adjusting nut in
combination with the ring y containing the lever y¹ the pin y' and the spring y and
prevented revolving by a fixed chain arranged and operating substantially as above
described with reference to Figures 2. 4. 6. 7. 14. 15. and for the purposes set forth
herein.
2nd. The modification of the said holder consisting of the parts of the body a. b
the plate the spring g the sleeve g' the washer the pin g the adjusting ring g
the lever 6' the screw pin and the spring arranged and operating for the
purposes set forth and herein described and illustrated by the accompanying
Figures 3. 5. 9. 10. 11. 12. 13. or any mere modification of the same.
Dated this 13th day of November 1893.
WALTER PAYTON.