A NEW OR IMPROVED MACHINE FOR MAKING MACHINE SCREWS
Year: 1880

page_text: LETTERS PATENT to Jasper Wetter, of the Firm of Herbert and Company,
Solicitors of Patents, of 67, Strand, in the City of Westminster, Civil
Engineer, for an Invention of "A NEW OR IMPROVED MACHINE FOR MAKING
MACHINE SCREWS." A communication from abroad by William Henry Eddy,
of Massachusetts, United States of America.
PROVISIONAL SPECIFICATION left by the said Jasper Wetter at the Office
of the Commissioners of Patents on the 23rd June 1880.
JASPER WETTER, of the Firm of Herbert and Company, Solicitors of Patents,
of 67, Strand, in the City of Westminster, Civil Engineer. "A NEW OR
IMPROVED MACHINE FOR MAKING MACHINE SCREWS." A communication from
abroad by William Henry Eddy, of Massachusetts, United States of America.
This machine is an automatic one, inasmuch as without the intervention of
human hands or labour it performs the operation of shaving or trimming the head
of each blank, nicking such head, reshaving or finishing it, transferring the blank
to threading mechanism, and while so transferring it turning it over end for end
and finally threading and discharging it. Furthermore, by this machine a series
of blanks are being operated on syn-chronously, that is to say, while one is being
fed in another is being shaved, another is being nicked, another reshaved, another
transferred to the threading mechanism, and another is being threaded and dis-
charged from the machino.
The bed frame of the machine supports two movable heads and two stationary
heads, these latter heads being between the two movable heads, each of which is
BO adapted to the bed frame as to be movable thereon lengthwise of it. Above the
said heads is a driving shaft supported by two standards projecting upward from
the bed frame.
One of the movable heads (the spindle head) carries a shaft (central shaft),
which is provided with two series of radial arms serving to support a series of
four spindles arranged parallel to and around the said shaft at equal distances
apart from each other and from such shaft.
Each spindle is furnished with a pair of levers (hereinafter called outer lovers)

page_text: carrying jaws at or near their out ends. Another pair of lovers (hereinafter
called inner levers) cooperate with said levers in a manner to aid in moving them,
so as either to move the jaws towards or apart from each other. To each of the
inner levers and to the spindle a spring is applied to move the longer arm of the
lever outwardly as occasion may require. There is on each spindlo and surrounding
it and the longer or oblique arms of the inner levers a collar provided with a
flange. On the collar being moved backward on the spindle such collar by acting
against the said oblique arms will cause the jaws to close upon a blank and hold it
firmly when between them.
The central shaft has mechanism for imparting to it an intermittent rotary
motion, which may be as follows:-Arranged in bearings in one of the movable
heads is a tubular shaft, to which are fixed two pulleys. By the side of the larger
of such pulleys is another pulley of like diameter, which, with a small gear, is
fixed on a short tabular shaft that turns loosely on the other tabular shaft.
The said gear engages with a larger gear by means of an intermedinte gear, such
larger gear being fixed on a tubular shaft, which is on and concentric with a cam
shaft parallel to the central shaft. Fixed on the cam shaft is a cam, which works
against a stud projecting from a pivoted sectoral gear or lover, whose arc of teeth
engages with a geer which is free to revolve on the central shaft. The said sectoral
lever is pivoted to an arm of the movable spindle head.
The said gear on the central shaft has a grooved hub projecting from one side of
it, and it has also a stud extending from its opposito side, such stud being to
cooperate with a notched wheel fastened on the central shaft. The notched wheel
has four holes and four notches arranged concentrically, the holes being at equal
distances apart, and to receive in succession the said stud. The peripheral notches
are also at equal distances apart, and besides them there is in the circumference of
the notched wheel an annular groove that receives a continuous rib projecting into
it from a furcated friction brake supported by a screw projecting from the spindle
head. Above the said brake is a screw for regulating the pressure of the brake on
the notched wheel to prevent the central shaft and its spindles by their mechanism
from being carried around too far for a bolt to properly enter a peripheral notch of
the said wheel. This bolt, adapted to slide vertically in a bracket, rests on the
end of a screw, which is secured through the inner arm of a lever, which, pivoted
to the spindle head, has its other arm resting on a cam fixed on the above described
cam shaft. The said cam and lever operate to force the bolt upward, so as to cause
it to lock the wheel, and consequently the central shaft, as often as may be
necessary.
A furcated lever pivoted to a bracket enters the annular groove of a tooth gear
mounted on the central shaft. Such lever at its lower part enters a slot in an arm
projecting from a vertical shaft, which turns freely on the arm, and at its upper
part has fixed to it one of two corresponding toggles. The other toggle is pivoted
to the spindle head, and with the first toggle is jointed to a pitman carried by a
bent lever, which is pivoted on a stationary arm projecting froin the spindle head.
The bent lever is moved by a grooved can fixed on the cam shaft.
The said vortical shaft is supported by two arms projecting from a vertical
tubular shaft that turns on a journal extending up from the stationary arm.
Furthermore, the vertical shaft extends through a furcated and slotted head to a
rod that slides in the central shaft.
On the central shaft is a short sleeve, from which a screw projects through a
slot of the shaft into an internal rod. Encompassing the said sleeve is a grooved
pulley, which should turn freely on the sleeve, but moves end ways with it.
Each of the four spindles has a driving pulley fixed on it. Furthermore, there
aro two loose pulleys, which revolve on stationary journals projecting from the
spindle head.
An endless belt arranged with the pulleys of the spindles and around a drum or
pulley fixed on the driving shaft serves to impart rotary motion to the said
Spindles.

page_text: The endless belt is so applied to the pulleys that the spindles of the driving
pulleys are caused to revolve in opposite directions in order for the shaving tools to
properly operate on the blanks.
In the upper part of the spindle head is a slide rod connected with the vertical
shaft by a link, whereby, when the shaft is moved by the toggles, the slide rod
will be moved longitudinally. There is fixed on the slide rod at its inner end a
notched head or projection to receive in succession the flanges of the collars
surrounding the inner levers of each spindle, so that the collar, whose flange may
be in engagement with the said head, will be moved by the vertical shaft, the jaws
being closed when the collar is moved back on the spindle, and opened when, the
collar is moved the opposite way.
The next parts of the machine to be described are those for ensuring the blank
- being brought into proper position lengthwise of it relatively to the shaving and
reshaving tools, and also for arresting the rotary motion of each spindle about its
own axis immediately after the shifting of the bell from the driving pulley of such
spindle.
•
Each spindle has a shoulder to bear against a sustaining arm mounted on the
central shaft. On the opposite side of the said arm and between it and the driving
pulley of the spindle is a collar or short sleeve, which projects within the pulley,
and is kept from revolving on the spindle by a stud, which extends from the pulloy
into it. Helical springs ensure the shoulder being kept closely up to the arm in
order for the bead of the screw blank to be suitably presented to the shaving and
reshaving tools.
The collar has two studs projecting from its periphery at opposite points
thereof.
These studs are to operate with two stationary cams. On the belt being shifted
off the driving pulley of the spindle one of the studs, while the central shaft may
next turn the set of spindles a quarter of a revolution, will be carried against one
of the cams, and in consequence thereof the rotary motion of the spindle on its own
axis will be stopped, and the spindle "will be next turned into a proper position.
By grasping the head at the ends of the nick the contraction of it by the jaws is
prevented.
A screw blank after having been nicked and reshaved will be adjusted so as to
bring its nick into parallelism with the direction it had while being made by the
nicking tool or saw.
Fixed to one of the standards or stationary beads is a hopper so applied to the
standard as to be moveable thereon horizontally and rectilinearly lengthways of
the machine, and to be fixed in place by a set screw.
Within the hopper is a rotary circular segment or feeder. It is grooved in its
chord lengthways to receive the shanks of the screw blanks, and is hooked at one
end of the chord. At the opposite end of the chord there is to the segment a
shield, which prevents the blanks taken up from being disturbed by those in the
hopper during the reciprocating rotary movements of the feeder. The feeder is
fixed on a horizontal shaft provided with a pinion that engages with a toothed
rack sustained in a rocker head. From the foot of the rack a rod extends and is
pivoted to a crank applied to the arbor of a level gear, such gear engaging with
another such gear carried by the cam shaft.
Wo will now suppose that a blank has been removed from the hopper spout by
the clearer, and seized between and by the prongs of tho carrying arm and carried
downwards to a proper position for being introduced between the jaws of the
uppermost spindle. A slider adapted to slide lengthways in a bracket projecting
up from the other stationary head or standard is employed to push the blank shank
foremost between the jaws. This slider is driven forward by a wedge and retracted
by a spring. A screw is screwed into the bracket and against the wedge for
adjusting the extent of the advance_of_the_slider by the wedge. The-wodge is
-pivoted to a slide-rod-jointed-to-a-lover-from which a stud projects and bears
against a cam fixed on a tubular shaft arranged on a cam shaft.

page_text: The said tubular shaft engages with the cam shaft by a "feather connection," or
devices that not only admit of the cam shaft being moved end ways within the
hollow shaft but cause the cam shaft when in revolution to revolvo the tubular
shaft.
The two movable heads are movable rectilinearly endways on the bed frame and
relatively to the cam shaft.
The clearer is pivoted to the spout of the hopper, and has a short arm extending
upwardly from its journal, such arm being engaged with a lever by a link. The
lower arm of the said lever bears against a cam fixed on a shaft, and is pressed up
to the cam by a spring. By the cam, spring, lever, link, and arm, as described, the
clearer derives its movements necessary for removing a blank from the spout into
a position for it to be seized by the carrying arm. The said carrying arın projects
from the shaft, from which an arm projects downward against the periphery of a
cam. By means of the said cam, spring, arm, and shaft the carrying arm derives
its movements for seizing the blank from the clearer, and after the retreat of the
latter carrying the blank down to the spindles to be forced between the jaws
thereof by the slider. After the blank may have been inserted between the jaws
of the spindle and caught by them the carrying arm is raised upward off the blank.
In each spindle and between tho jaws thereof, which are recessed to receive it,
is a blank clearor which is provided with a spring for advancing it. On the jaws
being moved to release the blank it will be forced out from between them and up
against the end of the slider, it being grasped by the transferer to be hereinafter
described.
After a blank may have been introduced into a spindle the latter has an orbital
movement to carry the blank down to a rest, by which it is supported while
being shaved in its head, or the latter is properly reduced for being nicked or slitted.
The shaving tool is supported in an arm projecting from a rock shaft by a
bracket.
One journal of the rock shaft turns in a bearing which is held to the bracket by
a claimp screw.
The other journal turns in a screw that screws into a box. This box has a
journal projecting up from it, and provided with a clamp screw, such serving to
confine the box in place in the bracket. The rock shaft is adapted so as to slide
end ways in its bearing, it being adjusted so as to bring the shaving tool into a
proper position for cutting the blank.
By means of this arrangement the shaft may be adjusted either into parallelism
with or a little oblique to the central shaft as occasion may require.
From the arm which supports the shaving tool a pitman projects upward into
and bears in a screw screwed through an arm projecting from a short rock shaft.
From this rock shaft an arm extends downward and is jointed to a bar which is
also jointed to one arm of a triarmed lever whose outer lower arm is provided
with a stud to work against the periphery of a cam fixed on the tubular shaft.
Another or forked arm which extends down from another rock shaft is pivoted in
its fork to one arm of the said triarmed lever. By means of this mechanism the
shaving tool is moved down gradually upon the blank to give form to its head.
The reshaving tool is like the shaving tool, and is supported and operated by
similar appliances.
Scrows placed directly over the two pitmen are for regulating the depth of cut
of the shaving and reshaving tools into the blank heads.
Furthermore, the reshaving mechanism has its rest like the rest of the shaving
mechanism, each of such rests being fixed to one of two pivoted arms, each being
provided with a projection to play into and out of recesses formed respectively in
two joined slides adapted to one of stationary heads, so as to slide horizontally
therein towards and from each other. These slides are provided with jaws to grasp
the blank by its shank and hold it firmly while it may be in the act of being
nicked.
Each of the said rests is adjustable lengthways in its carrier or arm.

page_text: The mechanism for closing the last named jaws may now be described. In rear
of each of the said slides is a cam which is adapted to an arm so as to be adjustable
thereon. The said arm is attached to a short shaft pivoted in one of the stationary
heads and provided with a gear which engages with one set of teeth of a duplex.
rack adapted to slide lengthways on the stationary head. One set of teeth of the
rack comes below and the other above its pinion, and there is to the rack a stud.to
bear against the periphery of a cam fixed on the tubular shaft mounted on the cam
shaft. A spring serves to keep the stud up to the cam and with it to move the
duplex rack. By theso means the slides are moved towards each other. During
such movement they so act against the two rest carrying arms as to force and hold
them upward, in order to bring the two rests up into positions for supporting the
blanks. While the slides are being moved apart the carrying arms drop downward
so as to carry their rests out of the orbital path of the screw blanks, in order for
the spindles to be revolved a quarter of their orbital revolution.
The nicking saw is fixed on the top of a vertical shaft, which is journalled in a
carriage supported by one of the stationary heads so as to be movable a short
distance lengthways of the machine. A bevel gear fixed on the said vertical shaft
engages with another such gear fixed on a horizontal shaft journalled in the said
carriage, and extending through a box fixed to the bed frame. The said horizontal
shaft slides freely in the box, and is provided with a gear to engage with the gear
on the cam shaft by means of an intermediate gear. The mechanism for advancing
the carriage is as follows:-It consists of a wedgo and mechanism for moving it
opposite ways between the bearing and an adjustable abutment adapted to revolvo
in one of the stationary heads. The wedge is joined to a bent lover which is
provided with a stud to bear against a cam fixed on a tubular shaft. As the cam
is rovolved with and by the shaft the wedge will be advanced, it being retracted
by a spring.
After the scrow blank may have been nicked it is next moved to the reshaving
mechanism, which takes off the burr produced by the nicking saw and finishes the
head. Having been thus finished the blank is moved another quarter of its orbital
rovolution and brought up into position to be transferred to the threading tool by
mechanism which may next be explained.
This mechanism, during the passage of the blank to the threader or the jaws for
holding the blank for being threaded, not only turns the blank "end for end," but
moves it lengthwise in the transferer, and adjusts it so that its head may properly
enter between the said jaws.
The transferer projects from one end of a long pinion, which turns on a stationary
tubular shaft through which the slide rod hereinbefore mentioned passes.
A helical spring suitably applied to the tubular shaft and to the pinion
operates to move the pinion back on its shaft preparatory to a return movement
of the transferer.
A toothed rack, adapted to slide vertically in a stationary head or a projection
therefrom, slides on a slide rod and between and against two helical springs
adapted to the rod. From the rod an arm extends and has a stud to rest on a cam
fixed on the tubular shaft.
There is a spring applied to the said arm to pull down the slide rod and the rack.
With the transferer an adjuster cooperates which is a stationary curved horn
or cam.
While the screw blank is being moved forward by the transferer the head of the
blank rests and moves against the upper curved edge of the adjuster, which moves
the blank end ways in the transferer, so as to bring the head of the blank into tho
proper position to enter the jaws by which it is next grasped, such jaws being
arranged in one of the stationary heads.
From the transferer thero projects a stud which at each of the extremes of motion
of the transferer brings up against one of two screws or adjustable stops-projecting
up from one of the stationary heads. These stops determine the positions the
transforer-is-to take for receiving and discharging-a-screw-blank.

page_text: The springs which support the rack as described yield and prevent the rack and
pinion teeth or the transferer from being overstrained or broken when tho stud of
the transferer is on either of the stops.
Over the upper spring is a nut which is screwed on the slide rod against the
spring, and serves to regulate the pressure of both springs on the rack.
The jaws slide toward and away from one another within the stationary head,
and have a spring applied to them for forcing them apart, they being also provided
with mechanism for closing them.
To the jaws there are applied by screws two lovers which, at their lower ends,
are pivoted to two toggles which are pivoted to a gear that engages with a toothed
sectoral lever. This lever has near its outer end a stud to rest against the
periphery of a cam fixed on the hollow cam shaft.
After the transferer may have transfered a screw blank into the jaws it is moved
aside and off the blank by means of a spring. The transferer is next moved back
toward tho series of spindles, and next is advanced laterally so as to cause it to
seize a blank projecting from the jaws of the uppermost spindle. This latter
movement of the transferer is accomplished by a forked lever which enters a groove
in the hub of the rack pinion, and has a stud bearing against the periphery of a
cam fixed on the hollow cam shaft.
The threader projects from and extends through the tubular shaft, and is applied
thereto by "feather connection," or devices which will admit of it being moved
endwise in the tubular shaft and revolved by such shaft. On its outer end the
threader has a head to which a spring is properly adapted, as shown, for retracting
the threader. Within the threader is the tool for shaping the end of the shank of
the blank, the said tool being so applied to the threader as to slide lengthways in
it, and be revolved with and by it.
The said blank end shaper is either to saw or taper the end of the blank or
finish it in the ordinary way.
The machinery for advancing the threader to cause it to take upon the blank is
thus described.
There is pivoted to a bracket a lever, from which a projection rests against the
head of the threader. The said lever has pivoted to it an arm provided with a
stud to bear against a cam which is clamped by a screw to a sleeve which encom
passes the cam shaft, and is held thereto by a set screw. Furthermore, there is an
ear extending down from the said lever and provided with a screw which screws
into the car and against the said arm.
The end shaper is moved by similar mechanism as the threader. The threader,
after catching upon the blank, continues to revolve, and forms on the blank the
screw thread.
While the thread is being made the end shaper is driven forward
against the blank and performs its duty.
The threader, having done its work in making the thread, is next to be unscrewed
from the blank.
On the tubular main shaft supported by the second movable head is a loose
pulley whose diameter equals that of the adjoining fixed pulley.
A band runs
around one of the said pulleys, and a wide drum or pulley fixed on the driving
shaft. Another crossed belt also runs on the drum and on either of the large
pulleys on the tubular shaft. Belt shifters fixed to the upper part of an arm are
applied to the two belts. The said arm projects up from a rock shaft pivoted
to one of the movable heads. The said arm carries an adjustable stud movable in
a alot in the arm, and provided with a screw and nut to clamp it to the arm.
stud enters a grooved cam fixed on the second tubular shaft of the movable head.
By means of the cam and lever the belt shifters are moved simultaneously so as to
shift the belts. The unscrewing of the threader from the blank is effected by
reversing the rotary motion of the threader.
The
There is combined with the second tubular shaft and the cam a mechanism
which, in case of clogging or irregularity of action of the mechanism by which the
blanks are fed into the machine and shaved, nicked, and reshaved, and subse-

page_text: quently transferred to the jaws for holding them for being threaded, will prevent
breakage of or accident to the machinery in consequence of such clogging or
irregularity of action.
There is fixed on the inner end of the second tubular shaft a circular disc or head
by whose outer sido there is also another head which slides lengthways on the
shaft and has a grooved hub to receive a lever to move the sliding head towards
or away from the fixed head.
From the sliding head a stud extends through a corresponding hole in the fixed
head, the stud, when the two heads are in contact, being long enough to project
into the groove of a third head fixed on the cam shaft by a set screw.
The last mentioned groove is circular, and has opening radially out of it a short
straight groove provided with a slide held in place by a clamp screw, and provided
with an adjusting scrow. The inner end of the slide is obtuse angular in shape,
and within the said groove is a small roller.
For adjusting the nicking saw into concentricity with its shaft and confining
the saw in place relatively to the shaft, a conic frustum is screwed on the spindle
and extends into the eye of the saw, a chambered nut being also screwed on tho
spindle to cover the said frustum.
In order to cleanse each blank after it may have been reshaved a stationary
brush is used, the blank, while being moved away from the reshaving tool, being
caused to pass through the said brush and to be cleansed thereby.

page_text: "
SPECIFICATION in pursuance of the conditions of the Letters Patent filed by
the said Jasper Wetter in the Great Seal Patent Office on the 22nd
December 1880.
JASPER WETTER, of the Firm of Herbert and Company, Solicitors of Patents,
of 67, Strand, in the City of Westminster, Civil Engineer. "A NEW OR
IMPROVED MACHINE FOR MAKING MACHINE SCREWS." A communication from
abroad by William Henry Eddy, of Massachusetts, United States of America.
This machine is an automatic one, inasmuch as without the intervention of
human hands or labour it performs the operation of shaving or trimming the head
of each blank, nicking auch head, reshaving or finishing it, transferring the blank
to threading mechanism, and while so transferring it turning it over end for end
and finally threading and discharging it. Furthermore, by this machine a series
of blanks are being operated on synchronously, that is to say, while one is being
fed in another is being shaved, another is being nicked, another reshaved, another
transferred to the threading mechanism, and another is boing threaded and dis- 1
charged from the machine. The nature of this Invention is fully set forth and
defined by the claims hereinafter presented.
In the Drawings A denotes the bed frame of the machine supporting two movable
heads B, C, and two stationary heads D, E, these latter heads being between the
two heads B, C, each of which is so adapted to the bed frame as to be movable ?
thereon lengthwise of it. Above the said heads is the driving shaft F which, as
shown in the Drawings, is sustained in bearings by two standards G, H, projecting
upward from the bed frame.
Within the head B is a shaft I which is provided with two series of radial arms a
arranged with it, as shown, they serving to support a scries of four spindles K
arranged parallel to and around the shaft I at equal distances apart from each other
and from such shaft.
Figure 7 is a longitudinal section of one of such spindles, all of which are alike
in construction, and each is furnished with a pair of levers b, b, carrying jaws c, c,
at or near their outer ends, such being as shown. Another pair of levers d, d,
arranged with the levers b, b, and in the spindle, as represented, cooperate with said
levers b, b, in a manner to aid in moving them so as either to move the jaws toward
or apart from each other. There is properly applied to cach lever d and to the
spindle a spring a to move the longer arm of the lever outwardly as occasion may
require. There is on each spindle and surrounding it and the longer or obliquo
arms of the levers & a collar f, which at its middle is provided with a flange g
projecting from it as shown. On the collar being moved backward on the spindle
such collar by acting against the said oblique arms will cause the jaws to close upon
a blank and hold it firmly when between them, the springs on tho collar being
moved the opposite way, serving to causo or aid in causing the jaws to move apart
so as to release their hold on the blank.
The shaft I has mechanism for imparting to it intermittent rotary motion, such
being thus described :-Arranged in bearings in the head C is a tubular shaft h, to
which are fixed two pulleys i, k. By the side of the larger of such pulleys, vis., that
marked, is another pulley y of like diameter, which with a small gear m is fixed
on a short tubular shaft that turns loosely on the shaft h. The gear m engages
with a larger gear o by means of an intermediate gear n, such gear o being fixed
on a tubular shaft L which is on and concentric with a cam shaft M arranged us
shown. Fixed on the shaft M is a cam P which works against a stud q projecting
from a sectoral gear or lever , whose are of teeth engages with a gears which is
free to revolve on the shaft I. The lever ? near its outer end is pivoted to an arm t
projecting from the movable head B.

page_text: *C
The gear & has a grooved hub u projecting from one side of it, and it also has a
stud v extending from its opposite side, such stud being to cooperate with a notched
wheel w fastened on the shaft I. A vertical section of such notched wheel and tho
parts over it is shown in Figure 8. The wheel has four holes and four notches y
arranged in it as represented, the holes being at equal distances apart and to receive
in succession the stud v. The peripheral notches are also at equal distances apart,
and besides them there is in the circumference of the wheel w a groove that extends
entirely around the wheel, and receives a continuous rib projecting into it from á ·
furcated friction brake a¹ which, arranged as shown, is supported by a scrow b²
projecting from the head B into a short slot c³ made vertically in the break. Above
the said break is a screw d¹ which is screwed up into a tubular projection e¹ of the
head B.
By means of the said screw the pressure of the break on the wheel w may be
regulated as occasion may require to prevent the shaft I and its spindles by their
mechanism from being carried around too far for a bolt f¹ to properly enter a
peripheral notch of the said wheel. This bolt, adapted to slide vertically in a
bracket g, rests on the end of a scrow ' which is screwed through the inner arm of
a lover, which, pivoted to the head B and arranged as shown, has its other arm
resting on a cam k¹. fixed on the cam shaft M. The said cam and lever operate to
force the bolt upward so as to cause it to lock the wheel, and consequently the
shaft I, as often as may be necessary.
A furcated lever arranged in the bracket gl, as shown, and pivoted thereto, enters
the groove of the hole u of the gear a. Such lover at its lower part entors a slot m² in
an arm n' projecting from a vertical shaft o' which turns freely on the arm and at
its upper part has fixed to it one of two toggles p', q'. The toggle q¹ is pivoted to
the head B, and with the toggle p' is jointed to a pitman' carried by a bent lever 8'
which is pivoted on a stationary arm projecting from the head B. The lever-8¹
is moved by a grooved cam u³, which is fixed on the cam shaft M and formed as
represented in Figure 4.
The shaft o is supported by and so as to revolve freely in two arms v¹, v¹,
projecting from a vertical tubular shaft w' that turns on a journal ¹ extending up
from the arm t. Furthermore the shaft o' extends through a furcated head y¹,
shown in top view in Figure 9, such head being slotted, as shown at c¹, to receive
the shaft. This head is fixed to a rod a² that slides in the shaft I which has on its
outer end a stop or nut b³.
On the shaft I is a short sleeve o³, from which a screw d³ projects through a slot e³
made lengthwise in the shaft I, such screws being scrowed into the rod a².
Encompassing the sleeve c³ is a grooved pulley f³, which should turn freely on the
sleeve and be so otherwise applied to it as to move endways with it in either
direction.
Each of the spindles K have a driving pulloy g' fixed on it. Furthermore, there
are two loose h³, h², which revolve on stationary journals projecting from the
head B, each loose pulley being arranged as represented in Figures 1, 2, and 3.
An endless belt arranged with the pulleys of the spindles and around a drum
or pulley fixed on the driving shaft serves to impart rotary motion to the said
spindles. The belt also goes around a guide pulley that is pivoted and slides
freely on a stationary journal m³ arranged as shown. I so apply the journal to
the frame as to be movable laterally thereon in order to effect tightening of the
belt, a set nut n² being employed to clamp the journal to the frame.
By the employment of the pulleys and, arranged as shown, with the
endless belt applied to the driving pulley and the pulleys 9³, g³, in manner
as represented, the spindles of the lutter pulley are caused to rovolve in opposite
directions in order for the shaving tools, to properly operate on the blanks.
The cam u¹ in revolving moves the bent lovers 8, so as to operate the toggles in
a manner to cause the rod a³ to be drawn back within the shaft I, whereby the
Grooved nulley f³ will be moved endwise so as to shift the endless belt³.from

page_text: gear 8.
one puneys to and upon the loose pulleys h³, h², such being in order to
enable the series of spindles to be revolved ninety degrees of a circle, such rotary
movement of them being effected by the cam p, sectoral gear lever 7, and the
The said gear 8 will previously have been moved into engagement with
the notched wheel w fastened on the shaft I, in order for the gear to revolve the
shaft a quarter of a revolution. In the upper part of the head B is a slide rod o³,
which is connected with the vertical shaft o! by a link pa jointed to them, whereby
when the shaft is moved by the toggles the slide rod will be moved longitudinally.
There is fixed on the slide rod at its inner end a notched head or projection q³ to
receive in succession the flanges g of the collars f. from which it will be scen
that while the rod o and its notched head may be in movement the collar whose
flange may be in engagement with tho said head will be correspondingly moved,
the jaws being closed when the collar is moved back on the spindle, and opened
when the collar is moved the opposite way.
The collars are successively brought around into engagement with the notched
head of the slide rod, the jaws of the spindles of each collar remaining closed while
the collar may be out of the head.
The next parts of the machine to be described are those for ensuring the blank
being brought into proper position lengthways of it relatively to the shaving
and reshaving tools, and also for arresting the rotary motion of each spindle about
its own axis immediately after the shifting of the belt from the driving pulley of
such spindle.
Each spindle has a shoulder made on it to bear against the next adjacent
surface of the sustaining arm a. On the opposite side of the said arm, and
between it and the driving pulley g² of the spindle, is a collar or short sleeve s³,
which projects within the pulley, and is kept from revolving on the spindle by a
stud which extends from the pulley into it, the said collar. Figure 10 is a
vertical section of the pulley and collar, it being taken through the stud; Figure 11
is a similar section taken through the helical springs u², u², entering between the
collar and pulley. Theso springs u³ in consequence of the pulley being fastened to
the spindle by a set screw 2 press the collar against the arm a and the pulley in
the opposite direction, so as to ensure the shoulder being kept closely up to the
arm in order for the head of the scrow blank to be suitably presented to the
shaving and reshaving tools.
The collar has two studs projecting from its periphery at opposite points :
thereof, as shown, Figure 12 being an outer sido, view of the collar.
These studs are to operate with two stationary cams x, y, arranged as shown,
and particularly in Figure 13, which is a transverse section of the machine taken
through such cams.
On the belt being shifted off the driving pulley of the spindle one of the 4
studs w³, while the shaft I may next turn the set of spindles a quarter of a
revolution, will be carried against one of the cams, and in consequence thereof the
rotary motion of the spindle on its own axis will be stopped, and the spindle will
be next turned into a proper position, whether for its blank being nicked or being
taken and suitably presented to the jaws, which sustain it while it is in the act of 4
being threaded, as such jaws should grasp it at the termini of the nick, instead of
grasping it at parts at right angles to the nick and between its termini. The said
jaws must hold the head of the blank with great pressure on it in order to prevent
the blank from being revolved in them by the threading tool, and it will be easily
seen that were they to grasp the head at parts of its circumference at right angles 5
to the nick the head might be contracted crosswise of the nick. By grasping the
head at the ends of the nick such contraction of it by the jaws is prevented.
By having the two cams x², y², arranged as described a screw blank after having
been nicked and reshaved will be adjusted so as to bring its nick into parallelism
with the direction it had while being made by the nicking tool or saw.
5
Fixed to the standard or stationary head D is a hopper N so applied to the

page_text: standard as to be movable thereon horizontally and rectilinearly lengthwise of the
machine, and to be fixed in place by a set screw s².
The spout of the hopper is shown at a³ as of the usual kind as used in screw
machines, and as provided with the mechanism for removing the blanks successively
from it, and carrying them down to the uppmost of the spindles for being introduced
between its jaws, such mechanism being the blank clearer 6 and the seizing and
carrying arm and their operative mechanism. I have however within the
hopper new and useful devices for picking up the screw blanks and arranging
them and presenting them to the spout.
Within the hopper is a rotary circular segment or feeder O, which is formed as
shown in Figure 14, which is a top view of it, and in Figure 15, which is a side
view, and in Figure 16, which is a longitudinal section of it, and in Figure 17,
which is an end view of it. It is grooved in its chord lengthwise, as shown at ď³,
to receive the shanks of the screw blanks, and is hooked at one end of the chord as
represented at e³. At the opposite end of the chord thero is to the segment &
shield f, which, shaped as shown, prevents the blanks taken up from being disturbed
by those in the hopper during the reciprocating rotary movements of the feeder.
The feeder O is fixed on a horizontal shaft g, provided with a pinion that
engages with a toothed rack' sustained in a rocker head . From the foot of
the rack a rod extends, and is pivoted to a crank m³ applied to the arbor of a
bevel gear n³, such gear engaging with another such gear os carried by the cam
shaft M.
Figure 18 exhibits a rear face view of the bevel gear n³ and the crank m³.
The crank is formed, as shown, to clasp the gear arbor p³, and is provided with a
screw q³ to contract it upon the said arbor with friction sufficient for it to be
revolved with the arbor. The object of so applying the crank to the arbor is to
prevent breakage of the gear or rack teeth should the feeder become caught or so
clogged in the hopper as not to readily turn therein, the mechanism imparting
to the said feeder reciprocating rotary movements in the hopper.
We will now suppose that a blank has been removed from the hopper spout by
the clearer and seized between and by the prongs of the carrying arm c³ (a side
view of which is shown in Figure 19), and carried downwards to a proper position
for being introduced. between the jaws of the uppermost spindle. A slider ³,
adapted to slide lengthwise in a bracket & projecting up from the head or
standard E, is employed to push the blank shank foremost between the. jaws.
This slider is driven forward by a wedge t, and retracted by a spring us, similarly
applied to the slider. The wedge extends through the bracket, a horizontal section
of which, with the slider and wedge, is given in Figure 20. In its rear a screw ³,
screwed into the bracket and against the wedge, such screw being for adjusting the
extent of the advance of the slider by the wedge, in order to cause the blank to be
inserted the requisite distance into the spindle. The wedge is pivoted to a slide
rod w³, arranged as shown, and jointed to a lever a³, from which a stud a* projects
and bears against a cam y³ fixed on a tubular shaft arranged on the shaft M, as
shown. The said tubular shaft engages with the shaft M by a "feather connection,"
or devices that not only admit of the shaft M being moved endwise within the
shaft, but cause the shaft M when in revolution to revolve the tubular shaft.
The two heads B, C, are movable rectilinearly endways on the bed frame A, and
relatively to the shaft M, in order that the mechanism of such frame may be
properly adjusted, as the lengths of the screw blanks to be operated on from time
to time may require.
The clearer 6 is shown in edge view in Figure 21, and in side elevation in
Figure 22. It is pivoted to the spout of the hopper, and has a short arm a¹
extending upward from its journal, such arm being engaged with a lever * by a
link b. The lower arm of the said lever bears against a cam d' fixed on the
shaft, and is pressed up to the cam by a spring c. By the cam, spring, lever,
link, and arm as described, the clearer derives its movements necessary for removing
a blank from the spout into a position for it to be seized-by the-carrying-arm-c.

page_text: The said carrying arm, shown in side view in Figure 19, projects from a shaft ƒ^,
from which an arm projects downward against the periphery of a cam h' fixed
on the shaft 3, a spring e being used to keep the arm up to the cam. By means
of the said cain, spring, arm, and shaft, the carrying arm e derives its movements
for scizing the blank from the clearer, and, after the retreat of the latter, carrying
the blank down to the spindles to be forced between the jaws thereof by the
slider 7*³.
After the blank may have been inserted between the jaws of the spindle and
caught by them, the carrying arm c³ is raised upward off the blank.
In each spindle and between the jaws thereof, which are recessed to receive it, is
a blank clearer k, which is provided with a spring for advancing it. On the
jaws being moved to release the blanks it will be forced out from between them
and up against the end of the slider, it being grasped by the transferer, to bo
herein-after described. While the spindle is receiving a blank such spindle is at
rest or has no rotary motion.
After a blank may have been introduced into a spindle the latter has an orbital
movement to carry the blank down to the rest m, by which it is supported while
being shaved in its head, or the latter is properly reduced for being nicked or
slitted. The shaving tool for such purpose is shown at n, Figuro 1.
Figure 24 is a transverse section of the machine, it being taken through the
arbor of the nicking saw. It shows the mechanism for shaving and reshaving the
blank.
A view of the inner end of the shaving tool is shown in Figure 25. This tool
is supported in an arm o projecting from a rock shaft 2, whose journals are
supported in bearing sustained by a bracket 9*.
Figure 26 is a longitudinal and vertical section of the rock shaft and its
supporting bracket. One journal of the rock shaft turns in a bearing which
projects from the bracket, and is held thereto by a clamp screw 8 and nut t'. Tho
other journal turns in a screw u¹ that screws into a box v', a front view of which
and the screw is given in Figure 26. This box has a journal w' projecting up from
it, and provided with a clamp screw and nut, as shown at 4, such serving to
confine the box in place in the bracket, a top view of which is given in Figure 27,
which shows the opening y' for receiving the journal of the box.
There is a screw screwed into the rock shaft to connect it with tho adjusting
screw u', which at its inner end abuts against the journal shoulder a³. The rock
shaft is adapted so as to slide endways in its bearing, it being adjusted by the
screw u*, so as to bring the shaving tool into proper position for cutting the blank.
By means of the opening y' and the journal and clamp screw and nut thereof
the shaft may be adjusted either into parallelism with, or a little oblique to, tho
shaft I, as occasion may require, to cause the shaving tool to operate to advantage
on the head of a screw blank.
A spring be applied to the arm of serves to raise it. From such arm a pitman c³
projects upward into and bears in a screw (, screwed through an arm e projecting
from a short rock shaft f. From this rock shaft an arın g³ extends downward
and is jointed to a bar ³, which is also jointed to one arm of a tri-armed lever 2³,
whose outer lower arm is provided with a stud to work against the periphery
of a cam fixed on the tubular shaft . Figure 28 is a side view of the arm g³,
bar ³, tri-armed lever ³, cam 15, and also another or forked arm m³, which extends
down from another rock shaft 215, arranged as shown. The arm m³ is pivoted in
its fork to one arm of the said tri-armed lever. By means of the cam 1, lever i³,
bar h, and arm g³, rock shaft f5, arm c, and pitman c³, the shaving tool is moved
down gradually upon the blank to give form to its head.
The reshaving tool, shown at n³, is like the shaving tool n', and is supported and
operated by similar appliances, viz., an arm o³, rock shaft p, bracket q³, bearings
,, adjusting screw us, spring 0, pitman c6, screw d", arm 9", rock shaft n10, and
the forked arm m³.
⚫ The screws d³, do, directly over the two pitmen are for regulating the depth of

page_text: cut of the shaving and reshaving tool into the blank heads, in order to make them
of such diameters as may be required.
Furthermore, the reshaving mechanism has its rest me like the rest m of the
shaving mechanism, each of such rests being fixed to one of two pivoted arms
nn, arranged as shown, each being provided with a projection o, as represented,
to play into and out of recesses p¹³, 21, formed respectively in two joined slides
qq, adapted to the stationary head Diso as to slide horizontally therein toward
and from each other. These slides are provided with jaws 15, to grasp the
blank by its shank and hold it firmly while it may be in the act of being nicked.
There is applied to the slides a spring & to forco them asunder.
Each of the rests m' and mº is applied so as to be adjustable lengthwise in its
carrier or arm ns, and provided with screws to, 15, to confine and adjust it in place
in the arm.
Figure 29 is a rear view of the rest and its carrier, while Figure 30 is a section
through both, showing the screws, and particularly the lower one, which is conical
at its inner end, the conical surface of the conical part bearing against the lower
end of the rest. The lower screw thus serves to force the rest upward in its carrier,
and the other screw to clamp it in place as occasion may require, the carrier being
slotted to receive the shank of the screw last named.
The mechanism for closing the jawa 71 may now be described. In rear of each
slide 9 is a cam³, which is adapted to an arm y, so as to be adjustable thereon.
Figure 31 is a horizontal section of the cam and arm with their adjusting and
clamp screws, a². The arm y is attached to a short shaft pivoted in the head D,
and provided with a gear 67, which engages with one set of teeth of a duplex
rack c, formed as shown in side view in Figure 32, and adapted to slide
lengthwise on the head D. One set of teeth of the rack comes below and the
other above its pinion, as shown in Figure 32, and there is to the rack a stud d' to
-bear against the periphery of a cam e fixed on the tubular shaft 23. A spring ƒ",
arranged as shown, serves to keep the stud up to the cam, and with it to move the
duplex rack. Thus by means of the cam the duplex rack and the gears of the
pivoted shafts of the two cams x, the slides 91, 91, are moved towards each other.
During such movement they so act against the two rest carrying arms 'n, n25, as to
force and hold them upward, in order to bring the two rests m², m³, up into position
for supporting the blanks. While the slides 95, 915, are being moved apart, the
arms n, n, drop downward, so as to carry their rests out of the orbital path of
the screw blanks, in order for the spindles to be revolved a quarter of their orbital
revolutions.
The nicking saw is shown at g? as fixed on the top of a vertical shaft h², which,
is journalled in a carriage supported by the head E, so as to be movable a short
distance lengthwise of the machine. A bevel gear k fixed on the shaft h7 engages
with another such gear fixed on a horizontal shaft m² journalled in the
carriage, and extending through a box k¹ fixed to the bed frame. The shaft m
slides freely in the box, and is provided with a gear n' to engage with the gear o
by means of an intermediate gear o. From the above it will be seen how the
nicking saw is revolved. There is applied to the carriage of the nicking saw
mechanism for advancing such carriage so as to cause the saw to cut the proper
distance into the head of the blank, and the carriage also has applied to it a
spring p' for retracting it.
The mechanism for advancing the carriage is as follows, it being shown in top
view in Figure 33:-It consists of a wedge 97, and mechanism for moving it
opposite ways, between the bearing 77 (fixed to the carriage) and an adjustable
abutment s adapted to revolve in the head E, in which there is an adjusting
screw for advancing the abutment, all being as shown in Figure 33. The
wedge q' is jointed to a bent lever (see Figure 34), which is provided with a
stud to bear against a cam aw, fixed on the tubular shaft. As the cam is
revolved-with-and-by-the-shaft-the-wedge-will-be-advanced, it being retracted. by

page_text: After the screw blank may have been nicked, it is next moved to the reshaving
mechanism, which takes off the burr produced by the nicking saw, and finishes the
head. Having been thus finished, the blank is moved another quarter of its
orbital revolution, and brought up into position to be transferred to the threading
tool by mechanism which may next be explained.
This mechanism during the passage of the blank to the threader, or the jaws for
holding the blank for being threaded, not only turns the blank "cud for end," but
moves it lengthwise in the transferer, and adjusts it so that its head may properly
enter between the said jaws.
Figure 35 is a top view, and Figure 36 a front end view of the transferer T;
while Figure 37 is a vertical section of the transferer and its operative mechanism.
It projects from one end of a long pinion y which turns on a stationary tubular
shaft a through which the slide rod w³ hereinbefore mentioned passes. A helical
spring a suitably applied to the shaft a" and to the pinion operates to move the
pinion back on its shaft preparatory to a return movement of the transforer.
A toothed rack 6s, adapted to slide vertically in a head E or a projection
therefrom, slides on a slide rod cs, and between and against two helical springs (s, e³,
adapted to the rod, see Figure 38, which is a vertical section of the rod and rack.
From the rod an arm f8 extends, and has a stud ³ to rest on a cam ³ fixed on the
tubular shaft Thero is a spring applied to the arm f8 to pull down the rod c
and the rack. From the above it will be seen that by means of the rack and pinion,
the slide rod and its arm, and the cam as just described, the transferer is moved or
advanced, it being drawn back by means of the spring.
With the transferer the adjuster V cooperates. It is a stationary curved horn
or cam arranged as shown.
While the screw blank is being moved forward by the transferer, the head of the
blank rests and moves against the upper curved edge of the adjuster, which moves
the blank end wise in the transferer, so as to bring the head of the blank into the
proper position to enter the jaws 8, 8, by which it is next grasped; such jaws
being arranged in the bead E in manner as shown in part in Figure 6, and in
horizontal section in Figure 38, and in vertical section in Figure 39, this latter
Figure representing the mechanism for closing the jaws. From the transferer there
projects a stud 18, which at each of the extremes of motion of the transferer, brings
up against one of two screws m³, m³, or adjustable stops projecting from the
head E. These stops determine the positions the transferer is to take for receiving
and discharging a screw blank. It was before stated that the rack b³ is supported
at its ends against springs ds, es. These springs yield and prevent the rack and
pinion teeth or the transferer from being overstrained or broken when the stud of
the transferer is on either of the stops.
Each spring, by being forced against the rack, not only aids in moving the rack,
but performs the office of maintaining the transferer stud in close contact with one
of the stops while such stud is to rest thereon. Over the upper spring is a nut n³,
which is screwed on the rod c against the spring, and serves to regulate the
pressure of both springs on the rack between them.
The jaws, s, slide toward and away from one another within the head E, and
has a spring s applied to them for forcing them apart, they being also provided
with mechanism for closing them.
To the jaws there are applied by screws of, as shown, two levers p, p, which at
their lower ends are pivoted to two toggles us, us, which are pivoted to a gear q³
that engages with a toothed sectoral lever . This lover has near its outer end a
studs to rest against the periphery of a cam 8 fixed on the shaft. In the
revolution of the cam the jaws at the proper time will be closed by the action of
the levers, the toggles, and the gear and sectoral lever. The screws o serve to
adjust the levers to the jaws as the diameter of the head of the screw blank may
require.
After the transferer may have performed its office of transferring a screw blank
into the jaws ³, s, it is moved aside and off the blank by means of the spring a³.

page_text: The transferer is next moved back toward the series of spindles, and next is
advanced laterally so as to cause it to seize a blank projecting from the jaws of the
uppermost spindle. This latter movement of the transferer is accomplished by a
forked lover us, which enters a groove in. the hub of the pinion y?, and has a
stud wo projecting from it and bearing against the periphery of a cam ³ fixed on
the shaft
is
The threader is shown at V. It projects from and extends through the tubular
shaft h, and is or should be applied thereto by a "feather connection," or devices
which will admit of it being moved end wise in the tubular shaft and revolved by
such shaft. On its outer end the threader has a head.y, to which a spring
properly adapted, as shown, for retracting the threader. Within the threader is
the tool a³ for shaping the end of the shank of the blank, the said tool being so
applied to the threader as to slide lengthwise in it and be revolved with and by it.
The said blank end shaper is either to saw or taper the end of the blank or
finish in the ordinary way in which a machine screw is generally made at the end
of its shank. There is to the shaper a spring 6º for actuating it.
The machinery for advancing the threader to cause it to take upon the blank is
thus described:
Thero is pivotted to a bracket a lever, from which a projection c extends
and rests against the head of the threader. The said lover has pivoted to it an
arm f' provided with a stud go to bear against a cam ho, which is clamped by a
screw to a sleeve, which encompasses the shaft M and is. held thereto by a set
screw. Furthermore there is an ear m³ extending down from the lever do, and
provided with a screw. nº which screws into the car and against the arm fº. The
screw n³ serves to adjust the lever to the arm fº to ensure the threader taking
upon the end of the blank when such threader is driven forward by the lever
moved by the cam.
The end shaper, like the threader, has for moving it in a lever o³, arm pº,
adjusting screw q, and operative stud 70, and cam 8, the cam being an annulus
encompassing the sleeve, and held thereto by a set screw to, all being arranged
and applied as represented. The threader, after catching upon the blank, continues
to revolve and forms on the blank the screw thread. While the thread is being
made the end shaper is driven forward against the blank and performs its duty.
The threader having done its work in making the thread is next to be unscrewed
from the blank.
.
By the side of the pulley i and on the tubular shaft h is a loose pulley uº whose
diameter equals that of the pulley i. A band runs around one of the said
pulleys and a wide drum or pulley w fixed on the driving shaft F. Another
crossed belt also runs on the pulley wand on either of tho pulleys k and yº:
Belt shifters, a, fixed to the upper part of an arm 610 are applied to the two
.belts. The said arın 610 projects up from a rock shaft co pivoted to the head C.
The arm b¹º carries an adjustable stud do, see Figure 40, which is a vertical section
of the arm and stud, the said stud being movable in a slot el in the arm and
The stud enters a.
provided with a screw f" and nut go to clamp it to the arm.
grooved cam ho fixed on the tubular shaft L herein before mentioned. By means of
the cam and lever the belt shifters are moved simultaneously so as to shift the belts,
the crossed belt being moved from the pulley k to the pulley y, or, from the latter
to the former of such pulleys as occasion may require. At the same time the other
belt will be shifted from one of the pulleys i and up to the other.
The unscrewing of the threader from the blank is effected by reversing the rotary
motion of the threader, which is done when tlio crossed belt is on the pulley / and
the other belt is on the pulley u. When the latter belt is on the pulloy i and the
crossed belt is on the pulley y' the threader is revolved so as to make the thread.
In order that the cam shaft M may be kept in revolution while the belt is on
5 the pulley, thero is within the pulloy a ratchet which engages with a
1210 mind by the pulley &... Figures 41 and 42 exhibit views of the two

page_text: .pulleys and their ratchet and pawl; a spring 10 applied to the pawl-forces it in
contact with the ratchet wheel 10.
"
There is combined, with the two shafts L and M a mechanism which in case of
clogging or irregularity of action of the mechanism by which the blanks are fed
into the machine and shaved, nicked, and reshaved, and subsequently transferred to
the jaws for holding them for being threaded, will prevent breakage of or accident
to the machinery in consequence of such clogging or irregularity of action.
There is fixed on the inner end of the tubular shaft L a circular disc or head m10,
by whose outer side there is also another head no, which slides lengthwise on the
shaft and has a grooved hub o¹0 to receive. a lever to move the head 10 toward or
away from the head mo. From the head n10 a stud 020 extends through a
corresponding hole in the head m10, tho stud when the two heads are in contact
being long enough to project into the groove po of a third head q10 fixed on the
shaft M by a set screw 10 screwed into the hub of the said head q¹; Figure 43 is
a section of the two shafts and the three heads, and Figure 44 is an inner sido
view of the head q¹º.
The groove po is circular, and has opening radially out of it a short straight
groove 810 provided with a slide to held in place by a clamp screw 10 and provided
with an adjusting screw 10, all being as shown. The inner end of the slide is
obtuse angular in shape, as represented, and within the groove 2010 is a small
roller w10
The slide can be adjusted so as to hold with sufficient power against the pressure
of the stud the roller stationary in and relatively to the groove for the shaft M to
bo revolved by the stud acting against the roller, and such slide is to be so adjusted
and to so hold the roller while the machinery may not be clogged or irregular in
nction as herein before mentioned. Should however any such clogging or irregularity
take place, the stud will force the roller away from the slide and travel around with
the roller in the groove without causing the shaft M to be moved by the shaft L.
Thus it will be seen that the heads mo, no, q¹º, stud 010, and slide t¹º, with their
accessories, as explained, constitute a safety attachment to prevent accident to or
breakage of the principle parts of the machine in case of some portion thereof
becoming clogged or irregular in operation.
For adjusting the nicking saw g into concentricity with its shaft 7 and
confining the saw in place relatively to the shaft, I make use of a conic frustum 10
to screw on the spindle and extend into the eye of the saw, and I screw on the
spindle and down upon the saw while resting on a shoulder y10 of the spindle a
chambered nut 10 to cover the said frustum, such being as shown in Figure 6, and
particularly in Figure 45 on an enlarged scale.
So in order to cleanse each blank after it may have been reshaved, I make use of
a stationary brush X arranged as represented, the blank while being moved away
from the reshaving tool being caused to pass through the said brush, and to bo
cleansed thereby. I would remark that after a blank may have been threaded and
the threader may have left it, the jaws for holding it to the action of the threading
tool or die open, and allow such blank to fall or be discharged from between them.
Having thus described my said machine what I claim may be stated as follows:-
1. I claim in combination with mechanism for threading a screw blank, and
mechanism for shaving and nicking its head, mechanisin for transferring the blank
from the latter to the former of the said mechanisms, and reversing or turning it
end for end, and properly adjusting it in the meantime, in manner as described, for
being received into the jaws of the threading mechanism.
2. I claim the combination of the adjuster V, substantially as set forth, with tho
transferer T having mechanism for moving it as described relatively to such
adjuster.
3. I claim the combination of a hopper and mechanism for feeding the screw
blanks successively therefrom, with mechanism for shaving and nicking the head
of each blank, mechanism for threading the shank of the blank, and mechanism

page_text: for transferring the blank from the mechanism, for shaping its head to the
threading mechanism, and reversing or turning the said blank end for end and
properly adjusting it in the meantime, as described, for being, received into the
jaws of the threading mechanism.
-
4. The combination of the four spindles provided with jaws and mechanism for
opening and closing them, as described, and also with mechanism for imparting to
such spindles not only an intermittent orbital motion about their common axis, but
intermittent rotary motions on their own axes, as set forth, with the screw blank
head shaving, nicking, and reshaving mechanisms for holding the blank by its head
while its shank is being: threaded, mechanism for screw threading the blank,
and mechanism for transferring such blank, in manner as described, from one of the .
spindles of the series thereof to the jaws or mechanism for supporting said, blank
while being threaded, and during such transfer reversing the blank and adjusting
it, as set forth, for its head to be received by such jaws, all being substantially as
shown and described.
"
5. The combination of the four spindles .provided with jaws and mechanism for
opening and closing them, as described, and also with mechanism for imparting to
such spindles not only an intermittant orbital motion about their common axis,
but intermittent rotary motions on their own axes, as set forth, with the screw
blank head shaving, nicking, and reshaving mechanisms, mechanism for holding the
blank by its head while its shank is being threaded, mechanism for screw threading
the blank mechanism for trimming the end of the shank of the blank, and
mechanism for transferring, in manner as described, such blank from one of the
spindles of the series thereof to the jaws or mechanism for supporting such
blank while being threaded, and during such transfer reversing the blank and
adjusting it as explained for its head to be. recaived by such jaws, all being
essentially as set forth.
6. The combination for intermittently revolving the spindles, it consisting of the
driving pulley, endless band i, sliding and rotary pulleys f,, auxiliary loose
pulleys h³, h³, and the spindle pulleys g², all being arranged and applied sub-
stantially as set forth.
7. The combination applied to the shafts M. and I for intermittently revolving
the said shaft I and its series of spindles, such combination consisting of the cam p,
stud q, sectoral lever r, gear s, stud v, perforated wheel w, furcated lever l', arm n²,
shaft o, arms v², v¹, toggles p¹, q³, pitman ¹, bent lever s¹, and cam u², all being
adapted and arranged substantially as set forth.
8. The combination with the spindle carrying shaft I and the shaft o' baving
mechanism for operating them, as described, of mechanism for causing the endless
belt to pass from two of the spindle pulleys g³ to the two auxiliary pulleys h², or
from the pulleys h³ to two of the pulleys g, as occasion may require, such
mechanism consisting of the rod a³, head y, sleeve c³, and screw d², arranged with
and adapted to the shafts I and o¹, essentially as set forth.
9. In combination with the head D and with the series of spindles provided with
jaws, as explained, and with machinery for nicking and shaving the heads of the
screw blanks, and transferring them, as described, to machinery for threading them,
the slider having mechanism for operating it, as specified, such slider being not
only to introduce the scrow blank between the jaws of a spindle, but to serve as a
seat or stop for the screw blank on it being discharged from the jaws.
10. The shaving tool rock shaft p' supported in the bracket o̟ by the adjustable
O bearings 4, 4, and adapted to slide endwise and to turn therein, and provided with
the adjusting screw us, all being substantially as set forth.
11. The combination with the transferer and its pinion and the operative
rack 6s of the latter, of the slide rod c³, and the two helical springs d³, e³, arranged
as set forth.
12. The combination of the adjustable stops m³, m³, with the head E, and with
the transferer provided with the stud and with the pinion y², rack 6³, springs
d³, e³, and rod c³, for operating such transferer relatively to the stops, as specified,

page_text: 13. The combination with the shafts L and M of the mechanism, which in case
of clogging or irregularity in action of the mechanism by which the blanks are
shaped and nicked, or otherwise treated as described, will operate to prevent
breakage or accident as mentioned, such mechanism being the heads m¹º, n¹º,
stud olo, grooved head q10, slide to, and its adjusting screw 210, and roller wo, all
adapted and arranged as sot forth.
In witness whereof, I, the said Jasper Wetter, have herounto set my hand
and seal, this Twenty second day of December 1880.