Improvements in Apparatus for Drilling and Punching Holes in Comb Circles.
Year: 1896

page_text: Date of Application, 17th July, 1896
Complete Specification Left, 20th Apr., 1897-Accepted, 26th June, 1897
PROVISIONAL SPECIFICATION.
Improvements in Apparatus for Drilling and Punching Holes in
Comb Circles.
We, JOHN BROOK WADDINGTON, of Perseverance Works, Harris Street, Bradford,
in the County of York, Mechanic, and JOHN VAREY, of Perseverance Works,
aforesaid, Comb Manufacturers, do hereby declare the nature of this invention to
be as follows:-
This invention has for its object the construction and combination of mechanism
in a novel manner by so arranging the parts that, small holes may be drilled in
comb circles and the said holes punched or elongated by the machino automatically,
without the aid of an attendant after the machine is set to work and the cutting
tools adjusted, and to arrange the mechanism that should the drill or punch break,
the machine will stop automatically.
In carrying out our object, the face plate for supporting the comb circle is of
the usual construction and supported in the ordinary manner, but instead of the
attendant having to operate the feed of the drill or punch, and rotate the face
plate by hand as hitherto, it is done automatically.
The drilling spindle is mounted on a sliding carriage, and the feed of the spindle
is controlled by a reciprocating lever, which moves the carriage rotating spindle
and drill towards and from the comb circle secured to the face plate of the
machine. The required pressure of the drill on the comb circle is adjusted by a
spring connected with the before mentioned reciprocating lever; or the pressure may
be controlled by connecting to the said lever, a piston working in an air barrel,
arranged with one or more valves, for admitting and allowing the compression of air
in the said barrel to suit the pressure required on the drill.
When a hole is bored through the comb circle, the drill is withdrawn clear of the
said circle, and the face plate moved the distance for the boring of next hole, by a
pawl operating a ratchet wheel, which is connected by a train of wheels to a worm
gearing with the face plate of the machine.
The pawl is attached to a lever secured to one end of a shaft, the opposite end
of which is provided with a crank, having a pin projecting therefrom supporting a
wheel hereinafter referred to, the crank pin passing through a hole in the wheel some
distance from the centre.
or
The pawl lever is held stationary during the boring operation by a projecting pin,
which may be electrically mechanically operated when the drill has bored through
the metal; when electrically connected, some portion of the reciprocating drill
carriage comes in contact with a terminal closing an electric circuit, and bringing a
magnet into operation, which attracts the before mentioned projecting pin such a
distance that, the support to the pawl lever is removed.
The loose end of the pawl lever then falls, thereby turning the shaft a certain
distance in its bearing, and the crank into such position that, the before mentioned
wheel is brought into contact with a revolving pulley in such a manner that, the crank
shaft and pawl lever attached thereto are moved back to their original position, the
pawl mounted on the lever engages with a ratchet wheel, turns the same the
distance equal to one tooth.
The pawl lever may be liberated by connecting the projecting pin with a lever so
arranged and mounted that, when the hole is bored through and some portion of the
reciprocating drill carriage comes in contact with the last mentioned lever, it is

page_text: The face plate A. for supporting the comb circle B. is of the usual construction
and supported on the gauntry C. in the manner as hitherto, but instead of the
attendant having to operate the feed of the drill or punch as the case may be, and
rotate or turn the face plate the distance required by hand as hitherto, these actions
are performed automatically in the manner as hereinafter described.
The rotating drilling spindle D. is mounted on a sliding carriage E. one end of the
said spindle is connected to a lever F. mounted on a fulcrum pin G. the opposite end
of the said lever being connected by a spiral spring H. to a slide block J. mounted on
a spindle K. supported by a bracket L. and gauntry C.
The slide, block J. is coupled by a rod M. to the rotating disc N. mounted to the
face of spur wheel O. driven by intermediary gearing P. and pinion Q. mounted on
driving shaft R. provided with a driving pulley S. thus by the rotation of the disc N.
a reciprocating motion is imparted to the rotating drill spindle D. and drill T. to and
from the face of the comb circle B. The required pressure of the drill T. on the
comb circle is imparted and adjusted by the before mentioned spiral spring H.
When the drill T. has passed through the comb circle B. an insulated wire U. will
be in contact with a terminal V. completing an electric circuit, whereby an
armature W. of magnet X. is attracted moving the pin W¹ in the direction of arrow
in Fig. 3. thus allowing the lever Y. one end supported thereby, and the other
secured end secured on shaft Z. to fall, thus causing the said shaft to turn some
distance in its bearing.
Un the opposite end of shaft Z. is secured an arm or lever 1. upon which is
mounted a wheel 2. the circumference of which rests on the grooved circum-
ference of friction pulley 4. driven in the direction of curved arrow by gearing 5.
operated by main shaft R.
When the wheel 2. is pressed into hard frictional contact with the friction pulley 4.
by the movement of the arm or lever 1. in the direction of curved arrow 2. the
wheel 2. is caused to make one revolution by which the arm or lever 1. and the
lever Y. are raised to their original position and again retained by the before
mentioned pin W'.
By raising the lever Y in the manner described a pawl 6. secured thereto
operates a ratchet wheel 8. and gearing 9. connected to the bevel wheels 10.
which operate a worm gearing with the worm teeth 11. formed on the circum-
ference of face plate A. thereby turning the said plate the distance required.
Should the drill T. be broken the light spring metal bar 12. which is sprung
underneath the said drill is released thereby allowing the said bar to make contact
with a bar 13. and complete the electric circuit causing the armature 14. of
magnet 15. to be attracted so that the lever 16. is liberated and allowed to fall
by which the pinion Q. on shaft R. is slided or withdrawn out of gear with the
wheel P. thus stopping the reciprocating motion of the drill spindle D.
The pawl lever Y. may be liberated by connecting the pin W with a lever 17.
shown in detail by Fig. 3. the opposite end of the lever being connected to the
drill spindle D. so that when the hole is drilled through the comb circle, the
lever 17. will have moved so far that the pin W' is withdrawn and the lever Y.
released and allowed to fall and operate the face plate A. in the manner as before
described.
The pressure of the drill T. may be controlled by connecting one end of the
lever F. to a barrel 18. provided with a piston the rod of which is connected to
the slide block J. shown by detail Fig. 7. The air barrel 18 is provided with
one or more valves for admitting and allowing the compression of air in the said
barrel to suit the pressure required on the drill T.
When arranging the apparatus for punching, the sliding or adjustable carriage E.
is provided with a sliding spindle 19. carrying in place of a drill, a punch 20. which
is reciprocated by a rotating disc 21. driven by shaft R. through the train of spur
gearing 22.
The face plate A. and comb circle B. secured thereto are automatically operated
in a somewhat similar manner as before described in reference to drilling and by the