Improvements in Screw Threading Machines.
Year: 1897

page_text: Date of Application, 27th Sept., 1897--Accepted, 6th Nov., 1897
COMPLETE SPECIFICATION.
Improvements in Screw Threading Machines.
I, ARTHUR JACOB MORSE, of the Town of Salisbury, in the County of Litch-
field, in the State of Connecticut, United States of America, Machinist, 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:
My invention relates to threading machines for use in threading the ends of
bicycle spokes or other rods, or bolts, and the object is to provide means for
rapidly and accurately forming the thread so that it will correspond with the
thread on the nipple or nut which it engages and not become injured by such
engagement.
To this end my invention consists in the combination with means for holding
the work, the threading die and its carrying spindle, of means for rotating the
spindle, and suitable means for advancing said spindle upon the work corre-
sponding to the thread but independent of the threading die.
And my invention consists in certain other combinations of parts hereinafter
described and specifically set forth in the claims.
In the Drawings hereto annexed and forming a part of this specification,
Figure 1 is a side elevation of my improved machine, the pan or base being
shown in section.
Figure 2 is a top plan view of the same.
Figure 3 is an end view of the right hand end of the machine.
Figure 4 is a transverse vertical sectional view taken on line 2, ≈, of Figure 1
and looking to the right.
Figure 5 is a transverse sectional view taken on line a, a, of Figure 1.
Figure 6 is also a transverse vertical section taken on line y, y, of Figure 1,
the weighted arm being in its vertical position.
Figure 7 is a longitudinal vertical sectional view taken on the line of the
driving shaft.
Figure 8 is a detached view of the slide.
Figure 9 is an enlarged sectional view of the driving pulleys.
Figure 10 is an end view of the frame which holds the loose pulleys apart, and
Figures 11 to 14 inclusive illustrate the threading chuck and die.
Referring specifically to the Drawings, A is an oblong base or pan on which
the sections of the machine are mounted. The right hapud section constitutes
the work-holding means and the left hand section constitutes the threading means.
The frame, B, of the threading means is secured stationary to the base, but the
frame of the holding means, B, is adjustable on the base toward and from the
other frame.
The threading chuck, a, is located between the two frames, facing the work-
holding frame and is carried on the end of the spindle, a', extending centrally
and longitudinally in bearings b and b₁ extending upwardly from the frame Bi.
The upper part of the bearing, b', is provided with vertical projection from
which extends a short arm, c, parallel with and directly above the spindle a
The end of the arm, c, is provided with a depending split bearing, c¹, which is

page_text: internally threaded and clasps an externally threaded tube, C, secured on one end
of the chuck-spindle. The thread on the tube, C, is the same as the thread formed
by the die held in the chuck, «, and this tube causes the die to form the thread
accurately for it compels the proper advancement of the chuck-spindle during
its rotation, as the bearing for the tube, C, is stationary.
If a die having other thread is inserted in the chuck, another threaded tube
and bearing corresponding to the die must be placed on the spindle. The tube
and bearing therefor may be removed by simply loosening the screw, c, passing
through the split bearing, cl, and taking off the nut, ", cn the end of the
spindle, a¹, and the nut, c, on the end of the arm c.
The spindle, a¹, is rotated by means of a cog-wheel, d, thereon meshing with
a cog-wheel, d, on the driving shaft, F, which is parallel with but below and
back of the said spindle. The direction of rotation of the spindle, a', is auto-
matically reversed after the thread has been formed on the spoke so that it is
carried back to its starting point ready to form another threakl, when it is
reversed again, and forms the thread on the second spoke. This is effected by a
worm-shaft, D, turning in bearings in the frame, 'B', and extending parallel
with the driving shaft and in the same horizontal plane; the screw-shaft is
provided with a worm, 1), intermediate its length which engages a
wheel, E, having its shaft, E, turning in bearings in the frame and extending
transversely below the other shafts. The worm-shaft, D, is driven in unison with
the driving shaft, F, by means of a small cog-wheel, e, on each shaft, and a third
cog-wheel, e, above and between them, the latter being mounted on the lower
end of a slotted plate, el, depending from an arm, f, projecting horizontally
from a vertical extension, f', of one of the risers forming the bearings for the
shafts.
Worm-
The driving shaft is movable slightly longitudinally, the driving pulleys, F1, F,
being loose on the shaft and continuously driven in opposite directions by belts,
not shown in the Drawings.
The driving shaft, F, is provided with a friction disk or wheel, F, which is
fast upon the shaft and between the loose pulleys, so that when the shaft is
moved to one end or the other, the disk, F, will engage either of the loose
pulleys and hold it to the shaft. The friction wheel, F, has its periphery
slightly beveled from the center, and the loose pulleys have the inner sides of
their rims beveled so that only a slight movement of the driving shaft is necessary
to cause the friction disk to engage and hold either of the pulleys.
Extending parallel with the driving-shaft, F, and directly below it is a bar, G,
which slides longitudinally in bearings in the frame. Projecting upwardly from
the ends of the bar, G, are fingers, g, g, which bear upon the reduced ends of
the shaft and cause it to move with the bar. The bar, G, is slotted to allow the
shaft of the worm wheel to pass through it. Extending from one side of the
bar, G, on opposite sides of the slot are a pair of pins, h, and h¹, which are
engaged alternately by a triangular-shaped cam-plate, H, mounted loosely on the
shaft E. The hubs of the worm-wheel and the cam-plate are provided with
lugs, i, and, as shown in Figures 6 and 7, which engage each other when the
worm wheel is rotated, and cause the cam-plate, H, to oscillate, and through the
pins and ¹ slide the bar, G, and shaft, F, longitudinally to reverse its direction
of rotation.
In order to give a quick movement to the cam, H, I extend upwardly from it,
a weighted arm I. The arm is pivoted to one side of the cam-plate and is pro-
vided with a pin, j, near its lower end which enters a short slot, , in the cam,
so that when the cam is rotated sufficiently to move the weighted arm beyond
its vertical position or center, it will fall over because of its weight and quickly
effect the longitudinal movement of the bar, G, and thus reverse the rotation
of the driving shaft and chuck-spindle.
The friction disk, FI, is secured rigidly to the driving shaft by a pin and the
loose driving pulleys are held apart on the shaft by a small frame formed by

page_text: joining together two rings, k, k, which hear against the ends of the hubs of the
pulleys, by four pins, k¹, k¹, which are provided with shoulders bearing on
the inner sides of the rings. The said pins pass through holes in the hub of the
friction disk so that the hub can move upon them, the frame being rotated with
the disk and driving shaft.
The chuck, a, is provided with internal thread for securing it upon the end
of the spindle, a¹. The die, 7, shown in Figure 14 of the drawings consists of a
disk with the usual cutting aperture in the center and separation extending to
the periphery. Said die is held in a recess of the face plate, , of the chuck and
is clamped between said face plate and the head, a, by four screws, m. The
die, 7, is centered by means of four screws, m', extending from the periphery of
the chuck to the die.
The
The holding means for the spoke, a*, or other work, consists of a clamp formed
of a pair of plates, n, n¹, extending vertically and pivoted at their lower ends
to the inner end of the frame, B, as shown in Figures 1 and 4 of the drawings.
The plates, n, and n', are confined near their upper ends by a horizontal recessed
bar, o, secured to the frame. The rear plate or jaw of the clamp is adjusted by
means of a screw, o, passing through the heel of the bar, o. The plates or jaws
of the clamps, n, n', are forced apart by means of a curved spring placed between
and bearing with its ends against pins, p, p, extending from the plates.
clamping plate, n', is moved toward the other plate by means of a small cam, q,
pivoted in the recess in the end of the bar o. This cam, q, is provided with an
arm, J, and a handle, J, by which it is operated. The arm has a horizontal
extension which enters a slot in a link r. The said link is hinged to an arm
secured to the lower side of a horizontal plate, K, which in turn supports the
spoke, a, while it is being threaded, the spoke being then in line with the center
of the die. The plate, K, is secured to a bar which is pivoted at its ends in the
uprights, s, and s¹. After the thread has been turned on the end of the spoke, a
and the chuck has moved back, releasing the spoke, the handle, J¹, is raised
quickly, which raises the plate, K, to the inclined position shown in Figure 4,
throwing the spoke back, out of the way of the next spoke which is placed in
position by the other hand of the operator, the machine being in operation
continuously and threading a spoke every time the chuck, a, advances toward the
clamping device.
t is an angular plate which serves as a guide for the lower side of the spoke
between the jaws of the clamp. The edge of the plate, t, is inclined so that when
moved back it will lower the spoke wltich is necessary when spokes of larger
diameter are threaded.
By loosening the thumb-nut, u, the guide-plate v, against which the end of
the spoke bears may be adjusted to accommodate longer or shorter spokes.
Having now particularly described and ascertained the nature of my sid
invention, and in what manner the same is to be performed, I declare that what
I claim is:-
1. In a threading machine, the combination with means for holding the work,
the threading die and its carrying spindle, of means for rotating the spindle,
and suitable means for advancing said spindle upon the work corresponding to
the thread but independent of the threading die, as set forth.
2. In a threading machine, the combination with means for holding the work,
the threading die and its carrying spindle, of means for rotating the spindle, a
threaded part on the spindle corresponding to the thread formed by the die, and
a stationary threaded bearing for said part, as and for the purpose set forth.
3. In a threading machine, the combination with means for holding the work,
the threading die and its carrying spindle, of means for rotating the spindle,
suitable means for advancing said spindle upon the work corresponding to the
thread but independent of the threading die, and means also to automatically
reverse the movement of the spindle, as set forth,

page_text: 4. In a threading machine, the combination with means for holding the work
the threading die and its carrying spindle, of a driving shaft geared to the
spindle, loose pulleys on the diving shaft, a friction disk fast on the shaft
between the pulleys to engage either of them, means to move the shaft longitudin-
ally, a threaded part on the spindle corresponding to the thread formed by the
die, and a stationary threaded bearing for said part, as and for the purpose set
forth.
5. In a threading machine, the combination with means for holding the work,
the threading die and its carrying spindle, of a driving shaft geared to the
spindle, loose pulleys on the driving shaft, means to hold them apart, a friction
disk fast on the shaft between the pulleys to engage either of them, means to
move the shaft longitudinally alternately in opposite directions, a threaded part
on the spindle corresponding to the thread formed by the die, and a stationary
threaded bearing for said part, as and for the purpose set forth.
6. In a threading machine, the combination with means for holding the work,
the threading die and its carrying spindle, of a driving shaft geared to the
spindle, loose pulleys on the driving shaft, a friction disk fast on the shaft
between the pulleys to engage either of them, said shaft being movable longitudin-
ally, a sliding bar below the driving shaft connected at its ends with the shaft,
a cam adapted to engage pins on said bar to move the latter longitudinally in
opposite directions, a threaded part on the spindle corresponding to the thread
formed by the die, and a stationary threaded bearing for said part, as and for
the purpose set forth.
7. In a threading machine, the combination with means for holding the work,
the threading die and its carrying spindle, of a driving shaft geared to the
spindle, loose pulleys on the driving shaft, a friction disk fast on the shaft between
the pulleys to engage either of them, said shaft being movable longitudinally, a
sliding bar below the driving shaft connected to its ends with the shaft, a cam
adapted to engage pins on said bar to move the latter longitudinally in opposite
directions, a worm shaft geared to the driving shaft, a wheel engaging the worm,
projections on the can and worm-wheel adapted to engage each other, a threaded
part on the carrying-spindle corresponding to the thread formed by the die, and
a stationary threaded bearing for said part to turn in, substantially as described
and shown.
8. In a threading machine, the combination with means for holding the work,
the threading die and its carrying spindle, of a driving shaft geared to the
spindle, loose pulleys on the driving shaft, a friction disk fast on the shaft between
the pulleys to engage either of them, said shaft being movable longitudinally,
a sliding bar below the driving shaft connected at its ends with the shaft, a cam
adapted to engage pins on said bar to move the latter longitudinally in opposite.
directions, a worm shaft geared to the driving shaft, a wheel engaging the worm,
projections on the cam and worm-wheel adapted to engage each other, a weighted
arm secured to the cam, a removable threaded tube on the carrying spindle, and
a stationary threaded bearing for said tube to turn in, substantially as described.
9. In a threading machine, the combination with the threading die and its
carrying spindle, of a pivoted supporting plate for the work, clamping jaws,
adjustable guides, a driving shaft geared to the spindle, loose pulleys on the
driving shaft, a friction disk fast on the shaft between the pulleys to engage either
of them, said shaft being movable longitudinally, a sliding bar below the driving
shaft connected at its ends with the shaft, a cam adapted to engage pins on said
bar to move the latter longitudinally in opposite directions, a threaded part on
the spindle corresponding to the thread formed by the die, and a stationary threaded
bearing for said part, as and fer the purpose set forth.
4
10. In a threading machine, the combination of a pivoted supporting plate for
the work, clamping jaws, a cam to operate the jaws, a handle to turn the cam and a
raise the plate, guides, a driving shaft geared to the spindle loose pulleys on the
driving shaft, a friction disk fast on the shaft between the pulleys to engage

page_text: either of them, said shaft being movable longitudinally, a sliding bar below the
driving shaft connected at its ends with the shaft, a cam adapted to engage pins
on said bar to move the latter longitudinally in opposite directions, a threaded
part on the spindle corresponding to the thread formed by the die, and a
stationary threaded bearing for said part, as and for the purpose set forth.
Dated this 6th day of August 1897
ARTHUR JACOB MORSE,
Haseltine, Lake & Co.,
45 Southampton Buildings, London, W.C., Agents for the Applicant.