Improvements in Machinery or Apparatus for Drilling and Punching the Circles of Circular Machine Combs.
Year: 1890

page_text: Date of Application, 16th Jan., 1890
Complete Specification Left, 16th Oct., 1890-Accepted, 20th Dec., 1890
PROVISIONAL SPECIFICATION.
Improvements in Machinery or Apparatus for Drilling and Punching
the Circles of Circular Machine Combs.
We, WILSON FORTUNE and FRANK HOLDSWORTH BENTHAM, of the firm of Fortune
and Bentham, Richmond Road, Bradford, in the County of York, Machine Comb
Makers, do hereby declare the nature of this invention to be as follows:-
This invention relates to improvements in machinery or apparatus for drilling the
circles of circular combs used in combing machinery particularly applicable to the
ordinary hand drilling machines, and its object is to enable such drilling and punching
to be done automatically.
The said invention consists of the arrangement of mechanism hereinafter described
whereby the drill or punch is alternately placed in operation and withdrawn from
operation to drill or punch each hole and at the completion of a hole the circle moved
into position for the next hole to be drilled or punched the drill spindle being
preferably operated longitudinally by said mechanism through the medium of the
usual hand lever so as to allow the automatic mechanism to be readily disconnected
and the machine worked by hand.
For this purpose we fix a sliding headstock upon the gantry or slide of the
machine in which we mount a cam shaft driven preferably by a belt. The said cam
engages a horizontal slide mounted upon said headstock at right angles to the face
plate of the machine and reciprocates it at each revolution of the cam shaft. Or
such slile may be partly disengaged from said cam so as to be only moved in one
direction by such cam and a spring or weight provided to effect the return motion
and feed the drill. The operating handle of the drilling spindle is coupled to said
slide thus as such slide is reciprocated the drill is brought into and removed from
operation with either a positive feed or fed by means of said spring or weight.
To move the circle and bring it into position for drilling a new hole after each
hole is drilled we mount a cog wheel in said headstock arranged to engage the
pinion attached to the winch handle of the worm mechanism or other convenient
wheel in such mechanism and the number of cogs in such cog wheel is a multiple of
the cogs in the pinion or wheel it engages. A ratchet wheel connected to said cog
wheel has an equal number of teeth or notches to the number of times the cogs of
the pinion multiply into the cogs of said cog wheel and such ratchet wheel is provided
with a pawl by which it is rotated through the distance between the teeth each time
a hole is drilled and the drill is withdrawn thus imparting a complete revolution to
said pinion and turning the circle into position for a fresh hole to be drilled.
The said pawl is actuated by a connecting rod connecting it or the attachment upon
which it is mounted to a lever normally held stationary by a catch but when the
drill passes through the circle the above mentioned slide releases said catch and the
pawl under the influence of a spring or weight passes over one tooth of the ratchet
wheel then on the return stroke of the slide the parts are restored to their normal
position thus moving the ratchet wheel through the space of one tooth.
The said pawl is arranged to be readily thrown out of gear to allow the worm
mechanism to be operated by hand.
The punching of the holes to enlarge them to receive pins of flattened section is
effected in a similar manner.
This 14th day of Ion 1800
DRACUP & NOWELL,
Bradford, Agents.

page_text: COMPLETE SPECIFICATION.
Improvements in Machinery or Apparatus for Drilling and Punching
the Circles of Circular Machine Combs.
We, WILSON FORTUNE and FRANK HOLDSWORTH BENTHAM, of the firm of Fortune,
and Benthan, Richmond Road, Bradford, in the County of York, Machine Comb
Makers, 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:
This invention relates to improvements in machinery or apparatus for drilling the
circles of circular combs used in combing machinery particularly applicable to the
ordinary hand drilling machines, and its object is to enable such drilling and punching
to be done automatically as well as by hand.
The said invention consists of the arrangement of mechanism hereinafter described
whereby the drill or punch is alternately placed in operation and withdrawn from
operation to drill or punch each hole and at the completion of the hole the circle
moved into position for the next hole to be drilled or punched the drill spindle being
preferably operated longitudinally by said mechanisin through the medium of the
usual hand lever so as to allow the automatic mechanism to be readily disconnected
and the machine worked by hand.
To fully describe our invention reference is made to the accompanying sheet of
drawings forming a part of this Specification in which similar letters of reference
indicate corresponding parts in each of the figures.
Figure 1, is an end view of the gantry of an ordinary circular drilling machine'
upon which our automatic mechanism is shown mounted as well as a portion of the
standard carrying the winch handle and pinion used for actuating the worm to rotate
the face-plate of the machine when the drilling and punching is done in the
ordinary way. The hand lever for sliding the drill spindle is shown in section
only.
Figure 2, is a plan view of the same with said lever represented in full and
connected to the drill spindle in the usual manner.
We mount a headstock A upon the slide B of the gantry (which may be coupled
to the drilling headstock D to enable both headstocks to be moved simultaneously
along the slide of the gantry. A shaft E driven by the pulley F and provided with
a cam G is mounted in bearings a in the headstock A. The cam G engages
projections b and 6 on the underside of a horizontal slide H mounted in guides d
at the top of the headstock A and thereby imparts a reciprocating motion to such
slide. The hand lever J is connected to the slide K of the drill spindle L in the
ordinary way but is pivoted on the stud M fixed to the adjustable bracket N attached
to the headstock A. The shank of the lever J is provided with a slot to receive
the stud P projecting from the top of the slide H, by this means as the slide H is
reciprocated the drill slide K and spindle L are moved in the reverse direction
through the medium of the hand lever operated mechanically by said cam and slide.
The cam G is of such a form and is driven at such a speed that the drill is fed to its
work uniformly at a suitable speed and after being quickly withdrawn is held stationary
a sufficient time to allow the circle being drilled to be moved into position to drill
the next hole.
To move the circle and bring it into position for drilling the next hole after each
hole is drilled and the drill withdrawn we form a cam face R on the cam G to engage
the projection e on the arm e¹ of the lever e² pivoted by the stud f in an opening S
left in the top of the head A. The arm e³ of this lever is coupled by the rods or
links g to the arms h and h¹ loosely pivoted on the shaft S¹ and carrying the pawl i.
The pawl i engages the ratchet wheel j keyed to the shaft S¹ mounted in bearings T
in the head A. A spur wheel adjustably mounted upon the shaft S engages the
pinion mounted upon the standard m which is the first pinion of the usual mechanism
for turning the face plate and is generally operated by the winch handle n.
number of cogs in the wheel k is a multiple of the cogs in the pinion / and the
The

page_text: and
ratchet wheelj has an equal number of teeth or notches to the number of times the cogs
of the pinion multiply into the cogs of the wheel k. The "rise" R' in the cam
face R is so placed in relation to the "dwell" in the cam G that R' engages the
projection e and vibrates the levere whilst the slide H is stationary. As the lever e²
is vibrated its arm e³ lifts the pawl i and pulls the ratchet wheel; round the distance
between the teeth and when in this position the spring catch p pivoted on the stud
catches the short arm e of the lever 2 and holds the parts in the position shown in
the drawing until the drill has passed through the circle, then the projection on the
top of the slide H meets the regulating screw t¹ in the arm p¹ of the catch
releasing such catch from e' allows the lever arm e3 and its attachments to drop so
that the pawl i slips on the ratchet wheel into the tooth below and is thus in position
for turning such wheel another tooth when the drill is withdrawn. When the auto-
matic mechanism is in use for drilling, the pin 61 is removed and the slide H is
moved in the direction required to feed the drill by means of the spiral spring
mounted on the fixed spindle y and compressed between the ends of the slide and
the nut on the end of such spindle during the reverse stroke of the slide. (A weight
connected to the end of the slide by a flexible connection passing over a pulley may
be employed instead of said spring.) By this arrangement there is less liability to
break the drill and it is not necessary to complete each hole during one revolution
of the cam G, as the drill may enter the same hole again and again if required
before it passes through, when the projection t on the slide H reaches the regulating
screw and disengages the catch p.
For punching holes after drilling it is necessary to replace the pin b¹ so as to
reciprocate the slide H in both directions by the action of the cam direct.
In order to prevent the ratchet wheel; moving more than one tooth at a time
we provide a stop pivoted on the stud fixed to the headstock and normally
held in a vertical position by the spring ³ so that its upper end lies in the path of
the stop pins projecting from the face of the ratchet. When the arm h¹ carrying
the pawl is lowered preparatory to moving the ratchet wheel its projecting heel h*
presses aside and holds it in that position until the stop pin immediately above it
has passed, then the arm rising allows to assume its normal position and by
engaging the next stop pin prevents the ratchet wheel moving too far. The pawl u
is provided to prevent the ratchet turning in the reverse direction with the arms h
and h
Having now particularly described and ascertained the nature of our said invention,
and in what manner the same is to be performed, we declare what we claim is :-
1. The combination with a hand drilling machine for drilling circles of combing
machines, of automatic mechanism constructed and arranged substantially as herein
shown and described and illustrated in the accompanying drawings.
2. The combination with automatic mechanisin for drilling circles of combing
machines, of a catch lever adapted to prevent the mechanism for moving the circle
from being brought into operation before the drill has completed each hole,
substantially as herein shown and described and illustrated in the accompanying
drawings.
3. In automatic mechanism applicable to hand machines for drilling circles, the
arrangement whereby the pinion wheel usually operated by hand has a complete
revolution imparted to it each time the circle is moved, substantially as herein shown
and described and for the purpose specified.
4. In automatic drilling machines for drilling circles, the combination with the
ratchet and pawl, of the stop r¹ substantially as herein shown and described and for
the purpose specified.
Dain thin 15th day of Ondobon 1800
DRACUP & NOWELL,
Bradford, Agents.