Improvements in Machines for Screw-threading Bolts and the like.
Year: 1891

page_text: Date of Application, 12th Aug., 1891
Complete Specification Left. Sth Mar., 1892-Accepted, 9th Apr., 1892
PROVISIONAL SPECIFICATION.
Improvements in Machines for Screw-threading Bolts and the like.
I, EMIL HUBNER of 33, Desbrosses Street, New York, in the County and
State of New York, United States of America, Bolt Manufacturer, do hereby
declare the nature of this invention to be as follows :-
My invention relates to improvements in machines for cutting threads upon
screw bolts and other objects, especially the former, whereby a single machine
under the care of one attendant will be enabled to produce complete threaded bolts
in quantities equal to those turned out by a number of machines as at present con-
structed and whereby the bolts after being threaded will be expeditiously released
and the machine brought into position to thread others, the machine being so
constructed that the oil dripping from its bearings or other points to which it is
fed will be conducted to a receiving vessel and supplied in proper quantities
therefrom to a feed receptacle.
In
The body part of the frame is in the form of an open box or trough divided by
transverse partitions and over which the mechanism hercafter described is mounted
and driven from a longitudinal central driving shaft mounted over an extension
of the bed and in two of the transverse partitions thereof and in bearings above
said partitions a series of parallel tubular shafts are mounted, preferably an even
number, say four, driven from two pinions fast on the driving shaft and in gear
with the two sets of wheels and pinions hereafter referred to on the tubular shafts.
Each of said shafts has at its front end a head to which a chuck or other instru-
ment for cutting a thread is attached and also a wheel and a pinion loose upon it,
with an intermediate clutch by which either may be made fast to the shaft.
order to economize space and obtain differential speed the wheels and pinions of
the several shafts are alternately arranged, the wheel of one shaft being trans-
The shafts are driven
versely opposite to, and gearing with, the pinion of the next.
through the wheels whilst the thread is being cut and through the pinions during
the reverse movement, by which the bolts are removed from the chucks so that a
quick return motion is obtained. Each clutch is shifted by a sliding rod mounted
beneath the corresponding tubular shaft. These shafts are operated upon to
reverse automatically in substantially the same manner, but they are differently
operated upon to impart to the tubular shafts a movement for cutting, the thread
each alternate shaft being operated upon in the same manner.
I will first describe the shifting inechanism of the first tubular shaft and the
method of operating the same, together with the mechanism for feeding the bolt
Within the tubular shaft
forward and registering the number of bolts threaded.
is a sliding rod having a feeler pin at its forward end, the rear end of the rod
being adapted to strike against the head of a horizontal stud mounted in the
vertical arm of an elbow lever pivoted to the frame and whose other arm is a latch
which is pressed by a spring into engagement with the clutch shifting rod upon
which a spiral spring is confined which is compressed when the latch engages with
the end of the clutch shifting rod and which throws the latter forward when the
latch is released. The clutch shifting rod is connected with the clutch by an arm
and its front end is connected by a link with a lever termed a fixing lever which
when pushed forward forces the clutch rod into engagement with the latch. The
rear end of the clutch-shifting rod is connected to the slotted end of a lever
pivoted loose on a transverse registering shaft and carrying a pawl engaging a
ratchet wheel fast on said shaft which is common to all the clutch rods. When
a bolt has been threaded and the shifting rod is placed in position to cause the

page_text: threading of another bolt, the pawl revolves the ratchet wheel one tooth thereby
also revolving the registering shaft and a large ratchet wheel secured upon the
registering shaft one tooth, the said large ratchet wheel being located at any con-
venient point in the length of the shaft. The large ratchet wheel is engaged by
the curved head of a registering lever pivoted at its head upon the upright
member of an angled post, secured to the bed. The long end of the lever is
connected by a link with the trip arm of any suitable registering device and the
head of the registering lever is held in engagement at all times with the ratchet
wheel by a spring or its equivalent. Thus when a ratchet wheel is moved a tooth,
it moves the head of the registering lever, depressing its opposite end, and causes
the registry of a finished bolt. At the front end of the machine a hollow base
block is erected upon the bed having inwardly-extending flanges forming slide-
ways for a table adapted to slide longitudinally thereon. The table has a lug at
its under side and longitudinally in its upper face it has a slot, the lower portion
of the slot being undercut. The movement of the table is accomplished through
the medium of a hand lever which is pivoted at one side of the base block and
attached to one side of the table. A bed block is placed upon the table provided
with a rib upon its under face fitting into the table slot, and the bed block may
be secured wherever desired in the length of the table by means of a bolt, the
head whereof is located in the undercut portion of the table slot and the threaded
end of the bolt passes upward through the bed block near its forward end, being
provided with a suitable nut. Upon the hed block is fixed, with facility for
transverse adjustment thereon, an L-shaped tail block, to the upright member of
which is attached, with facility for vertical adjustment, a socket formed preferably
with a circular bore in which the shank of a clamp or retaining head is fitted and
held from turning. The retaining head has a cavity or recess corresponding in
shape to that of the bolt head it is to receive. When the head of an unthreaded
bolt is placed in the retaining head, the end of the shank to be threaded, when
the socket is properly adjusted, will be in position to enter between the dies or
jaws of the chuck. The table, base-block, tail-block, and socket, may be termed
a guide or head stock and by reason of the adjustment of each section or member
thereof, the bolt carried by the retaining head may be expeditiously made to enter
the chuck. In the operation of this portion of the machine, when the thread has
been cut upon the bolt the desired length the bolt presses against the feeler pin
of the sliding rod in the tubular shaft and causes said rod to release the latch
from connection with the clutch shifting rod which is forced forward by its spring
throwing the clutch out of gear with the large wheel and into gear with the pinion.
The movement of the tubular shaft is thus instantly reversed and the speed is
increased, which causes the chuck to rapidly leave the threaded portion of the
bolt. By moving the hand lever forward a slight distance, the entire head or
guide stock with which it is connected is moved in the same direction and the
finished bolt may be removed and another inserted. The lever is then carried
further forward until the lug at the underside of the head or guide stock table
strikes the fixing lever carrying it forward whereupon the clutch shifting rod is
pushed rearward and engaged with the latch. This movement of the rod throws
the clutch again into engagement with the large gear wheel and the movement of
the tubular shaft is again reversed and its speed decreased. The rearward move-
ment of the clutch shifting rod also causes the registering shaft to revolve as
heretofore stated, and the finished bolt is duly registered. A guide or head stock
of the construction described is provided for each tubular shaft and likewise a
latch lever, pawl lever, and ratchet wheel for recording purposes. The movement
of the clutch-shifting rod of the second tubular shaft is just the reverse of that
above described, and consequently the tendency of the spring is to throw the rod
rearward and the link and fixing lever are dispensed with, the rod being directly
acted on by the lug of the guide stock table engaging with a collar on its front
end, the operation of reversing the motion of the tubular shaft, and actuating the
registering mechanism, being otherwise substantially similar to that above described,

page_text: the difference in the operation of the two shafts being necessary by reason of the
difference in the relative position of the wheels and pinions upon the driven tubular
shafts.
I will now describe a modified form of guide or head stock adapted for use
when bolts with round heads are to be threaded. The base block and table are
the same in construction as that of the guide stock heretofore described. The bed
block, however, is made in two sections, one section being adapted to slide upon
the other and the opposing faces of the sections are bevelled whereby the movable
section travels upon an inclined plane, the adjustment of the upper section which
is the movable one being preferably accomplished through the medium of a screw.
Both sections of the base block may be moved longitudinally upon the table and
secured in any desired position in the length of said movement by the screw con-
necting the table and head block in the same manner as heretofore described.
The hand lever is also the same being pivoted to the base block and connected
with the table. The chuck or retaining device adapted to clamp the head is made
of two sections, the one section being capable of longitudinal adjustment upon the
bed block and the other section attached to a bell crank lever which is fulcrumed
upon the bed block. The said lever is provided with a can-faced lug and a spring
bears against the other member of the lever, the tendency of the said spring being
to open the chuck. The chuck is closed when the bolt head is to be clamped
through the medium of a hand lever provided with a cam rib engaging with the
cam lug of the chuck lever whereby the chuck is locked in a clamping position.
Each chuck section is provided with a clamping jaw, removable in order that
suitable sizes of jaws may be placed in the chuck sections to clamp any form of
head.
In the operation of the entire machine the attention of but one man is needed.
Starting at the first tubular shaft, for instance, the bolt is placed in position to be
threaded and when a bolt has been cut by the chuck a second bolt is placed so as
to be operated upon by the second shaft and when this bolt has been cut in the
chuck of this shaft, the attendant passes to the next shaft, repeating the operation,
and thence to the fourth shaft, or vice versa. It will thus be observed that by the
time a bolt has been placed to be threaded in the chuck of the last shaft, the bolt
entered upon the first shaft is threaded and completed and ready to be removed.
Thus, in one machine, the work of four may be accomplished. The bolts finished
upon all the shafts are duly recorded one after the other.
One of the prime features of the invention is to provide a means whereby a
waste of oil may be obviated and this is accomplished mainly through the box-like
structure of the bed which bed receives all the oil dripping from any of the
moving portions of the machine. The oil is conducted from the various compart-
ments of the bed through the medium of pipes carried forward preferably over a
tank. The oil is fed to the various moving portions of the machine through the
medium of suitable oil cups and to the bolts, while being threaded, from a tank
located above the tubular shafts and provided with an overflow which leads down
into the first tank and with a series of tubes terminating in flexible nozzles over
the bolts, whereby the oil may be guided over the threaded surface of a bolt or
over the surface to be threaded as may be deemed advisable, the supply of oil
from the tank being controlled by stop-cocks. The oil collected in the lower
tank is fed to the upper tank by a pump operated preferably by a belt from any
adjacent countershaft. In order to preserve any oil that may drip from the
bearings of the pump, tubes are located beneath said bearings, having funne
shaped upper ends and leading to the tank. At each side of the machine, in
horizontal alignment with the thread-cutting devices, fenders are located adapted
to direct the oil thrown in the direction of the sides of the machine by the rotation
cf the tubular shafts down into the bed and the gearing is covered by a casing, to
prevent the same from becoming clogged with dust.
Instead of hand levers, foot levers may be utilized to operate the shifting shafts,

page_text: the foot levers being connected by screw-couplings and chains to the clutch-
shifting rods.
Dated this 12th day of August 1891.
E. HUBNER,
By A. M. & Wm. Clark,
53, Chancery Lane, London, Patent Agents.
COMPLETE SPECIFICATION.
Improvements in Machines for Screw-threading Bolts and the like.
I, EMIL HUBNER of 33, Desbrosses Street, New York, in the County and State
of New York, United States of America, Bolt Manufacturer, 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 improvements in machines for cutting threads upon
screw bolts and other objects, especially the former, whereby a single machine
under the care of one attendant will be enabled to produce complete threaded bolts
in quantities equal to those turned out by a number of machines as at present
constructed and whereby the bolts after being threaded will be expeditiously
released and the machine brought into position to thread others, the machine being
so constructed that the oil dripping from its bearings or other points to which
it is fed, will be conducted to a receiving vessel and supplied in proper quantities
therefrom to a feed receptacle.
The invention consists in the novel construction and combination of the several
parts as will be hereinafter fully set forth and pointed out in the claims.
Reference is to be had to the accompanying drawings, forming a part of this
Specification, in which similar figures and letters of reference indicate corresponding
parts in all the views.
Figure 1 is a side elevation of the machine.
Figure 2 is a plan view thereof.
Figure 3 is a longitudinal section taken practically on the line 3-3 of Figure 2.
Figure 4 is a similar section taken on the line 4-4 of Figure 2.
Figure 5 is a transverse section taken on the line 5-5 of Figure 2.
Figure 6 is an elongated sectional view of the adjustable socket adapted to
receive and hold the bolt to be threaded, the said section being a longitudinal one
and taken on the line 6-6 of Figure 7.
Figure 7 is a transverse section through the mechanism illustrated in Figure 6,
the section being taken upon the line 7-7 of the said figure.
Figure 8 is a detail view of one end of the trip rod, partially in section.
Figure 9 is a side elevation of a modified form of adjustable socket or chuck
adapted to hold the bolt, and
Figure 10 is a plan view thereof.
Figure 11 is a detail perspective view of a cam-faced lever utilized-for shifting
the jaws of the chuck.
Figure 12 is a detail perspective view of the movable jaw acted upon. by the
lever.
Figure 13 is a perspective view of one. of the gripping jaws detached from the
adjustable main jaw.
Figure 14 is a side elevation of the trip and registering mechanism.
Figure 15 is a vertical section through the said mechanism, taken on the line 15
of Figure 14.
Figure 16 is a detail view of a lever, ratchet, and pawl, constituting a portion of
the tripping mechanism and
Figure 17 is a vertical section, taken on the line 17 of Figure 14, and

page_text: Figure 18 is a longitudinal section, through the machine, illustrating a modifica-
tion in the construction thereof.
The body A of the machine is preferably made of iron or other metal and is box-
like, comprising a continuous bottom a and upright sides a' and ends a². The bed
is essentially rectangular in general.outline and at one end is provided with an
extension A constituting an integral portion of the main body frame but the
extension is of much less width, as is illustrated in Figure 2. The entire bed is
preferably supported upon two leg frames 10 and 11. The main bed is usually
provided with three transverse partitions 12, 13, and 14, the partitions 12 and 13
being of greater height than the partition 14 and a partition 15, preferably box-
like or tubular in its character, is erected at or near the outer end of the bed:
extension and is also of less height than the partitions 12 and 13. The driving
shaft 16 is journaled in suitable bearings upon the partition 15 and in the
partitions 12 and 13. The shaft extends centrally and longitudinally of the bed,
as shown in Figure 2. The outer end of the shaft has secured thereon a driving
pulley 17 and a fly-wheel 18 and between the partitions 12 and 13 two pinions 19.
and 20 are keyed or otherwise attached. In suitable bearings 21 and 22 formed
respectively near the upper edges of the partitions 12 and 13, a series of tubular
shafts are horizontally journaled, the said shafts being parallel and preferably of
an even number, as, for instance, 4, which are designated as B, C, D, and E. Each
bearing 21 and 22 is usually fitted with an oil cup 23.
Each tubular shaft at its forward or front end is provided with.an enlargement
or head 24 and to each head any approved form of chuck 25 is attached or other
instrument adapted for cutting a thread. Each tubular shaft is further provided
with two gears which are loosely mounted namely a large gear wheel 20 and a
smaller wheel or pinion 27. In order to economise space and obtain differential
speed, the gears are alternately arranged, the pinions upon one shaft being trans-
versely opposite the spur gears upon the next shaft, as is illustrated in Figures 2
and 5. Between the gears of each tubular shaft a sleeve 28 having clutch faces at
its ends is splined or otherwise held to slide upon the shaft and turn therewith, and
the faces of the gear hubs opposed to the clutch faces of the sleeves are constructed
to receive such clutch faces, as is shown in Figures 3 and 4. The large gears are
the driving gears, while the thread is being cut, and are calculated to drive the
tubular shafts at a predetermined rate of speed, and the small gears or pinions act
as the driving gears upon the reverse movement of the shafts which movement
removes the bolts from the chucks. The pinions contain preferably about one-half.
the number of teeth that the gears do, whereby the threaded bolt is released much
more expeditiously than the thread is cut, a decided advantage in machines of this..
type. The pinion upon one tubular shaft meshes with the spur gear upon the next
shaft. The drive shaft revolves to the left and as the pinions of the drive shaft
mesh with the spur gears of the tubular shaft, the latter gears are turned to the
right and the pinions of the tubular shafts revolve in the same direction as do those.
of the drive shaft, namely to the left, as indicated by the arrows in Figure 5.
The shifting shaft is held to slide in bearings 29 beneath each tubular shaft, said
bearings being located in the partitious 12 and 13. These shafts are operated upon
to reverse automatically in substantially the same manner, but they are differently
operated upon to impart to the tubular shafts a movement for cutting the thread.
and as each alternate shaft is operated upon in the same manner I have distinguished
them by the letters F and H. I will first describe the shifting mechanism of the
first tubular shaft B, illustrated in the sectional view Figure 3, and the method of
operating the same, together with the mechanism for feeding the bolt forward and
registering the number of bolts threaded. Within the tubular shaft a rod 30 is.
held to slide, the forward end of which has a pin 31 screwed therein or otherwise.
attached. The rear end of the rod extends beyond the shaft and is adapted to
strike against the head of a horizontal stud 32 adjustably secured in the upper end
of a vertical lever. 33,.. pivoted. at. its lower. extremity. upon. one side of the body.
extension.. Upon the pivoted end of the lever a horizontal forwardly-extending

page_text: latch 34 is firmly attached, or the latch may be made integral with the lever and
the head of the latch, which is normally held downward by a spring 35, engages
with a head 36 upon the rear end of the shifting shaft while the bolt is being
threaded, as shown in Figure 3. The shifting shaft is encircled by a coil or spiral
spring 37 having a bearing against the rear journal box, and a collar 38 fixed upon
the shaft. When the head of the latch and the shaft engage, the spring is com-
pressed and when the head of the shaft is released, the spring throws the shaft
forward. The shifting shaft and the clutch 28 of the tubular shaft B are preferably
rigidly connected by a bar 39 secured to the collar 38. The forward end of the
shifting shaft is connected by a link 40 with a fixed lever 41 pivoted upon a
partition 42 forward of the partition 14 and the fixing lever, when pushed forward,
forces the shifting shaft to an engagement with the latch 34. At the rear of the
partition 12 of the main bed, a registering shaft 43 is journaled in suitable bearings
located upon the extension bed A, as is best shown in Figure 3, and the shaft is of
sufficient length to project some distance beyond the sides of the said extension.
At one extremity of the shifting shaft a link lever 44 is fulcrumed near its centre,
as shown in detail, Figure 14, and the lower end of the lever is provided with a
slot 45 receiving a pin 46 which connects the lever with the head of the shifting
shaft. The upper end of the lever is provided with a spring-pressed dog 47 and
said dog engages with the teeth of a ratchet wheel 48 fast upon the registering
shaft. When a bolt has been threaded and the shifting shaft is placed in position
to cause the threading of another bolt, the dog revolves the ratchet wheel one tooth
thereby also revolving the registering shaft and a large ratchet wheel 49 secured
upon the registering shaft one tooth, the said large ratchet wheel being located at
any convenient point in the length of the shaft. The large ratchet wheel 49 is
engaged by the curved head of the registering lever 50 pivoted at its head upon
the upright member of an angled post 51 secured to the extension of the bed. The
long end of the lever is connected by a link 52 with the trip arm of any suitable
registering device 53 and the head of the registering lever is held in engagement at
all times with the ratchet wheel 49 by a spring 54 or its equivalent attached to the
registering device and to the rear end of the lever, as shown in Figure 3. Thus
when a ratchet wheel 49 is moved a tooth it moves the head of the registering
lever, depressing its opposite end and causes the registry of a finished bolt. Around
the fixing lever a hollow base block 55 is erected upon the bed A having inwardly
extending flanges at its inner edges forming slide-ways 56. A table 57 is located
upon the block adapted to slide longitudinally thereon, being provided with grooves
in its sides to receive the slide-ways 56, as shown in Figure 7. The table has,
integral with its rear end, a downwardly extending lug or arm 58 and longitudinally
in its upper face a slot 59, the lower portion of the slot being under-cut, as shown
at 60 in said Figure 7. The movement of the table is accomplished through the
medium of a lever 61 which is pivoted at one side of the base block and attached to
one side of the table. A bed block 62 is placed upon the table, provided with a rib
upon its under face fitting into the upper member of the table slot 59 and the bed
block may be secured wherever desired in the length of the table, by means of a
bolt 63 the head whereof is located in the under-cut portion of the table slot and
the threaded end of the bolt passes upward through the bed block near its forward
end being provided with a suitable nut, as is illustrated in Figures 6 and 7. The
bed block has a transverse groove 64 cut in its upper face adapted to receive a
rib 65 formed upon the horizontal member of an L-shaped tail block 66, the tail
block being provided with a transverse slot extending through the rib and a set-
screw 67 which is passed through the slot in the bed block. By this means the
tail block may be fixed in any transverse position upon the bed block, as shown in
Figure 6. A socket 68 is attached to the vertical member of the tail block and is
vertically adjustable thereon by producing a slot 69 in the said member and passing
a set screw 70 through the slot into the socket. The socket is formed preferably
with a circular bore, in which the shank of a clamp or retaining head 71 is fitted
-and held from turning by a set screw of any description. The retaining head has a

page_text: cavity or recess 72 formed therein, of polygonal shape, the contour of the recess.
corresponding to that of the bolt-head it is to receive.
When the head of an unthreaded bolt is placed in the retaining head 71, the end.
of the shank to be threaded, when the socket 68 is properly adjusted, will be in.
position to enter between the dies or jaws of the chuck, as shown in Figure 3. The
table, base block, tail block, and socket, may be termed a guide or head stock and
by reason of the adjustment of each section or member thereof, the retaining head
may be expeditiously made to enter the chuck. In the operation of this portion of
the machine, when the thread has been cut upon the bolt the desired length the
bolt presses against the pin 31. of the sliding bar 30 in the tubular shaft Band at
the rearward movement of the rod, it strikes the post 32 thereby canting the
lever 33 sufficiently to relieve the latch 34 from connection with the shifting shaft F
and the moment the shaft is released it is forced outward by the action of the
spring 37 causing the clutch 28 to disengage from the large gear 26 and engage
with the pinion 27. The movement of the tubular shaft B is thus instantly reversed
and the speed is increased which causes the chuck to rapidly leave the threaded
portion of the bolt. By moving the lever 61 forward a slight distance, the entire.
head or guide stock with which it is connected is moved in the same direction and
the finished bolt may be removed and another inserted. The lever is then carried
further forward until the lug or arm 58 of the head or guide stock table strikes the
fixing lever 41 carrying it forward, whereupon the shifting shaft is pushed rearward
and its head engaged with the latch 34. This movement of the shaft throws the
clutch in engagement with the gear 26 and the movement of the tubular shaft is
again reversed and its speed decreased. The rearward movement of the shifting.
shaft also causes the registering shaft to revolve as heretofore stated and the finished
bolt is duly registered. A guide or head stock of the construction described is.
provided for each tubular shaft and likewise a latch lever and post, link lever and
ratchet wheel for recording purposes.
The movement of the shifting shaft H of the second tubular shaft C is just the
reverse of that of the shaft F and consequently the position of the bar 39 con--
necting it with the chuck also occupies a reverse position to the bar connecting the
shaft with its chuck, as is best shown in Figure 4. The tendency of the
spring 37 is to throw the shaft H rearward and instead of the latch 34 engaging
with the upper surface of the shaft head it contacts with its rear face and the
link 40 and the fixing lever 41 are dispensed with, the shaft being continued
through the partition 15 and also the lugs 58 of the guide stock table, as shown in
Figure 6 and beneath the table it has secured thereon a collar 72. The shifting
shaft having been fixed to throw the clutch 28 in inesh with the large gear of the
shaft C, when the bolt is threaded the pin 31 of the sliding rod 30 is struck thereby
and the rod in the manner heretofore described releases the shifting shaft from the
latch 34 and the shaft being thrown rearward by its spring moves its link lever in
such a manner as to cause it to turn the registering shaft through the medium of its
dog and adjacent ratchet wheel engaged thereby. It will be noticed that the
shaft H records as soon as the bolt is threaded and the shaft F somewhat afterward.
The shaft H is set for the cutting operation by drawing it forward until the latch
strikes its head which is accomplished by the lug 58 of the table 62 drawing upon
the collar 72 of the shaft. The difference in the operation of the two shafts F
and H is made necessary by reason of the difference in the position of the gears.
upon the driven tubular shafts.
In Figures 9 and 10 I have illustrated a modified form of guide or head stock,.
the same being adapted for use when bolts with round heads are to be threaded.
The base block 55 is the same in construction as that of the guide stock heretofore
described and likewise the table 57. The bed block 62 however, is made in two
sections and d', one section being adapted to slide upon the other, and the
opposing faces of the sections are bevelled whereby the inovable section travels
upon an inclined plane. The adjustment of the upper section d which is the
movable one is preferably accomplished through the medium of a screw 73 entering

page_text: -
the rear end of the section and held to slide in a rib 74 formed upon the under
section. Both sections of the base block may be moved longitudinally upon the
table and secured in any desired position in the length of said movement, by the
screw 73 connecting the table and head block in the same manner as heretofore
described. The lever 61 is also the same being pivoted to the base block and
connected with the table. The chuck or retaining device G adapted to clamp the
heal is made in two sections g and g'. The section is capable of longitudinal
adjustment upon the bed block and the section is attached to a bell crank
lever 75 which is fulcrumed at the junction of its members upon the bed block,
as is best shown in Figure 10. The said lever is provided with a cam-faced
lug 76 upon its upper face near the chuck section g', and a spring 77 bears against
the other member of the lever and against the dogs 78 formed upon the base
block, as is likewise best shown in Figure 10, the tendency of the said spring
being to force the chuck section away from the opposing section g. The chuck
section is forced in the direction of the fixed section, when the bolt head is to
be clamped, through the medium of a lever 79 fulcrumed upon the dogs 78.
This lever is provided with a cam rib 80 engaging with the cam lug 76 of the
chuck lever. By the manipulation of the lever 79 the lever 75 is drawn inward
and locked in a clamping position. Each chuck section y and gl is provided with
a clamping jaw 81, illustrated in detail in Figure 13. These clamping jaws are
removable in order that suitable sizes of jaws may be placed in the chuck sections
to clamp any form of head.
In the operation of the entire machine the attention of but one man is needed.
Starting at the shaft B for instance, the bolt is placed in position to be threaded
and when a bolt has been cut by the chuck, a second bolt is placed so as to be
operated upon by the shaft C and when this bolt has been cut in the chuck of this
shaft, the attendant passes to the next shaft D, repeating the operation, and thence
to the shaft I, or vice-versa. It will thus be observed that by the time a bolt has
been placed to be threaded in the chuck of the shaft E, the bolt entered upon the
shaft B is threaded and completed and ready to be removed. Thus in one machine
the work of four may be accomplished. The bolts finished upon all the shafts are
duly recorded, one after the other.
One of the prime features of the invention is to provide a means whereby a
waste of oil may be obviated and this is accomplished mainly through the box-
like structure of the bed and its extension, which bed receives all the oil dripping
from any of the moving portions of the machine. The oil is conducted from the
various compartments of the bed, through the medium of downwardly-extending
pipes 83 which connect with one or more horizontal pipes 84, the latter pipe or
pipes being carried forward preferably over a tank 85 bolted or otherwise secured
to the forward legs 10. The oil is fed to the various moving portions of the
machine through the medium of suitable oil cups and to the bolts while being
threaded, from a tank 86 located above the tubular shafts, said tank being pre-
ferably supported by standards secured to the upper portion of the partition 13,
as shewn in Figure 3. The tank 86 is provided with an overflow 87 which leads
down into a tank 85 and with a series of tubes 88 extending horizontally from the
under side which tubes are curved downward so as to be located over the bolts
while they are being threaded and upon the curved lower ends of the tubes 88
flexible tips 89 are attached whereby the oil may be guided over the threaded
surface of a bolt or over the surface to be threaded, as may be deemed advisable.
The supply of oil from the tank 86 may be cut off whenever desired through the
medium of stop cocks 90 one of which is located at any desired point in the length
of each of the supply tubes 88. The oil collected in the tank 85 is fed to the
upper tank 86 through the medium of a pump 91 of any suitable or approved
form, the same being best illustrated in Figure 1, and the pump is operated
preferably through the medium of a belt passing over a drive pulley 92 connected
with the pump and over a suitable pulley upon any adjacent countershaft. In
order to preserve any oil that may drip from the bearings of the pump, tubes 93

page_text: are located beneath said bearings, having funnel-shaped upper ends 9+, as is also
illustrated in Figure 1, which tubes 93 connect with the tank 85 through the
medium of horizontal pipes 95. The suction pipe 96 of the pump also passes
through the tank 85 and the supply pipe 97 into the upper tank 80.
In each side
of the machine in horizontal alignment with the thread-cutting devices, fenders 97ª
are located adapted to direct the oil thrown in the direction of the sides of the
machine by the rotation of the tubular shafts down into the bed, and the gearing
is covered by the casing 98 to prevent the same from becoming clogged with dust.
Instead of hand levers, foot levers 99 may be utilized to operate the shifting shafts,
in which event the foot levers are connected by screw couplings 100 and chains 101
to the collars 38 of the shifting shafts, as shown in Figure 18, the chains being
passed over suitable rollers 102.
Having now particularly described and ascertained the nature of my said inven-
tion and in what manner the same is to be performed, I declare that what I
claim is-
1. In a machine of the character described, the combination, with a drive shaft,
of a driven shaft having a screw-cutting head, gears held to slide upon the
driven shaft adapted to mesh with the gears upon the drive shaft, a shifting
or reversing mechanisin, and means, substantially as described, for operating the
said mechanism automatically by the finished bolt, as and for the purpose set.
forth.
2. In a machine of the character described, the combination with a drive shaft.
having fixed gears, a tubular driven shaft provided with a screw-cutting device,
and a sliding trip-rod located in the tubular shaft, of gears held to slide upon the
tubular shaft, a shifting shaft located beneath the tubular shaft, a latch lever
engaged by the trip rod and engaging with the shifting shaft, and a clutch
mechanism carried by the tubular shaft and connected with the shifting shaft,
substantially as described.
3. In a machine of the character described, the combination, with a drive shaft,
a tubular driven shaft provided with loosely mounted gears, a screw cutting device
and a clutch located between the gears, of a spring-pressed shifting shaft con-
nected with the clutch, a trip rod adapted to be engaged by a finished bolt.
and loosely placed in the tubular shaft, a trip lever provided with an adjustable
head located near one end of the trip rod, and a spring-pressed latch connected
with the lever and engaging the shifting shaft, as and for the purpose specified.
4. In a machine of the character described, the combination, with a drive
shaft, a driven shaft provided with loosely mounted sliding gears, a screw-cutting
device, and a clutch between the gears, of a spring-controlled shifting shaft
connected with the clutch, a recording mechanism, a recording shaft, a trip
mechanism connecting the recording shaft and recording mechanism, and a
link connection between the shifting shaft and the recording shaft, substantially
as described.
5. In a mechanism of the character described, the combination, with a drive
shaft, a tubular shaft provided with sliding gears, a clutch between the gears and
screw-cutting device, and a trip rod adapted to be acted upon by the driven
bolt, said rod being located within the tubular shaft, of a spring-controlled
shifting shaft connected with the clutch, a trip lever located near one end of
the trip rod, a latch attached to the lever and engaging with the shifting shaft,
a recording shaft, a recording mechanism operated from said shaft, and a link
connection between the shifting and the recording shafts, as and for the purpose
specified.
6. In a machine of the character described, the combination, with a drive shaft,
a tubular driven shaft provided with sliding gears and a screw-cutting device, a
shifting shaft, and a clutch located between the gears of the tubular shaft and
connected with the shifting shaft, of a trip rod held to slide in the tubular shaft, a
trip lever near one end of the trip rod,. atch connected with the lever and
R

page_text: engaging with the shifting shaft, and a movable head stock adapted to carry the
bolt and also adapted for engagement with the shifting, shaft to set the same, as and
for the purpose specified.
7. In a machine of the character described, the combination, with a drive shaft,
a tubular driven shaft provided with sliding gears and a screw-cutting device,
a shifting shaft, and a clutch located between the gears of the tubular shaft and
connected with the shifting shaft, of a trip rod held to slide in the tubular shaft,
a trip lever near one end of the trip rod, a latch connected with the lever and
engaging with the shifting shaft, a movable head stock or chuck adjustably attached
to the head stock, and an arm projected from the head stock and engaging at
one point in its travel with the shifting shaft, moving the same, substantially as
described.
-S. In a machine of the character described, the combination, with a drive shaft,
gears fixed thereon, a tubular shaft provided with sliding gears of different
diameters, and a screw-cutting device, a spring-controlled shifting shaft below the
tubular shaft, a clutch mechanism located upon the tubular shaft between its gears
and connected with the shifting shaft, and a trip rod held to slide in the tubular
shaft, of a trip lever provided with an adjustable head located near one extremity
of the trip rod, a latch carried by the lever and adapted for engagement with
the shifting shaft, a recording mechanism, a recording shaft adjacent to the
recording mechanism, a link connecting the shifting shaft and the recording
shaft provided with a spring-pressed dog, a ratchet wheel mounted upon the
recording shaft and engaged by the dog, a second and larger ratchet wheel
secured upon the recording shaft, and a lever engaging with the larger ratchet
wheel and connected with the trip device of the recording mechanism, as and for
the purpose specified.
9. In a machine of the character described, the combination, with the drive shaft
having fixed gears, a tubular driven shaft provided with a screw cutting device and
sliding gears of different diameters, a spring-controlled shifting shaft, a clutch held
to slide upon the tubular shaft and connected with the shifting shaft, a recording
nechanism, a recording shaft journaled at a right angle to the shifting shaft, and
a link connecting the recording shaft and shifting shaft and provided with a spring-
controlled dog, of a trip rod held to slide in the tubular shaft, a lever the upper
end of which is opposite one end of the trip rod, a latch attached to the lever and
engaging with the shifting shaft, a movable head stock, an adjustable chuck or
bolt clamp carried by the head stock, an arm attached to the head stock and
engaging with the shifting shaft, and a trip mechanism operated upon by the
recording shaft and connected with the recording mechanism, as and for the purpose
specified.
10. In a machine of the character described, the combination, with the drive
shaft having fixed gears, a series of independent essentially parallel tubular
shafts, each tubular shaft being provided with loosely mounted sliding gears, the
gears of the several shafts meshing with each other, and certain of the gears
with the fixed gears of the drive shaft, a screw-cutting device located upon
one end of each tubular shaft, and a clutch located upon each tubular shaft
between its gears, of a spring-controlled shifting shaft located beneath each tubular
shaft and connected with the clutch of the tubular shaft above it, a recording
mechanism, a recording shaft, link connections between the shifting shafts and
recording shafts, and a trip mechanism connected with the recording mechanism
and the recording shaft, as and for the purpose specified.
11. In a machine of the character described the combination, with a drive shaft
provided with fixed gears of equal size, of a driven shaft provided with a screw-
cutting device, sliding gears of different diameters adapted to mesh alternately
with the fixed gears of the drive shaft, a spring-controlled shifting shaft, a clutch
located upon the driven shaft between its gears and connected with the shifting
shaft, a latch lever engaging with the shifting shaft, and a trip rod located in the
driven shaft and adapted to engage with the latch lever, substantially as shown

page_text: and described, whereby the driven shaft will be given a slow movement when
the bolt is being threaded and a quick movement after the bolt is threaded, as set
forth.
12. In a machine of the character described, a body frame comprising a box-like
structure provided with partitions to receive the shafts of the mechanism, sub-
stantially as shown and described, whereby the oil dripping from the mechanism is
caught and retained in the base, as and for the purpose specified.
13. In a machine of the character described, a box-like base supported by
standards, a trough located beneath the base, and tubes leading from the base to
the trough whereby the oil which is caught by the base is conveyed to the trough,
as set forth.
14. In a machine of the character described, the combination, with a box-like
base or body adapted to carry the operative mechanism of the machine, a trough
supported upon the supports of the base, and a tank located above the mechanism
carried by the base, of a pump connected with the trough and tank, and
tubes leading from the base into the trough, substantially as and for the purpose
specified.
15. In a machine of the character described, the combination, with the box-
like base or frame, a tank and trough located beneath the frame, and a second tank
located above the frame, of a pump having connection with both tanks, tubes
connecting the base with the lower tank, tubes projected from the upper tank
downward and provided with flexible tips, and an overflow pipe leading from the
upper tank into the box-like frame, as and for the purpose specified.
וי מ
01
1000
E. HUBNER,
By A. M. & Wm. Clark,
53, Chancery Lane, London, Chartered Patent Agents.