Improvements in Clutch Reversing Mechanism, specially applicable for Use in Screw-tapping Apparatus
Year: 1896

page_text: Date of Application, 14th Apr., 1896-Accepted, 13th Mar., 1897
COMPLETE SPECIFICATION.
Improvements in Clutch Reversing Mechanism, specially applicable
for Use in Screw-tapping Apparatus.
I, FRANKLIN ALFRED ERRINGTON, of No. 15 Townsend Avenue, Village of
Edgewater, (Stapleton Post Office) County of Richmond, State of New York,
United States of America, Mechanical Engineer, 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, particularly, to means for automatically reversing the
motion of a driven part or spindle; and broadly to the embodiment in a reversing or
similar mechanism having three clutch members whose axes are located in line and
the rotation of whose driving member is constant in direction, of a new principle in
the construction of the clutch mechanism, whereby the combination of certain
ratios of the lengths of the parts of the intermediate clutch member to certain
distances between the corresponding parts of the two end clutch members, will
enable the members at one end, upon being unclutched from rotary engagement,
and when rotating independently, to positively push or draw, (by the co-action of
their opposing surfaces) the clutch members at the other end into rotary
engagement; also to the means for unclutching said clutch members from rotary
engagement; also to means for driving a cutting tool in the working direction by
two friction disks, the tension of whose frictional contact may be adjusted in
accordance with the work to be done under normal conditions, and which are
arranged to permit the frictional surfaces to slide over each other under any undue
increase of strain, to prevent breakage of the cutting tool. All of said improve-
ments are shown combined in a single structure of novel design and construction ;
and to these ends the invention consists in the novel details of improvement and
the combinations of parts that will be more fully hereinafter set forth and then
pointed out in the claims.
In the clutch mechanism embodying the automatic features of my invention the
clutch members are provided with driving faces performing two distinct functions,
the faces that enable one clutch member to turn the other being called "rotary-
driving faces," and the faces that enable one member to push or draw the other
longitudinally past the "dead centre" being called "longitudinal-driving faces,"
and the construction of the parts may be varied from that shown, but in every
case my principle of construction must be used to secure the functional result
required.
Reference is to be had to the accompanying drawings forming part hereof,
wherein:
Figure is a partly broken vertical cross-section of a machine constructed in
accordance with my invention;
Figure 2 is a partly broken plan view of the device with the cover removed;
Figure 3 is a partly sectional side elevation of the clutch mechanism, in which
the clutch members are at the point of disengagement of one set of rotary driving
faces;
Figure 4 illustrates the clutch mechanism in the position for reversing the
spindle, and
Figure 5 is a detail view of the stop-sleeve.

page_text: In the drawings, 1 is the frame or case of my device provided with a hub 1,
said hub being counterbored, forming a base plate 1', having a smaller central bore
or spindle bearing 1. 2 is the reversing wheel, which is provided with parallel spur
gear-teeth upon its periphery, a hub 2 projecting from its outer face and pierced
by a concentric screw-threaded bore 2b. 3 is a reversing end clutch member shown
in the form of a clutch-sleeve provided with an annular flange or shoulder 3ª, and
an externally screw-threaded portion 3b, and on its inner face are formed the
clutch teeth 3º, said sleeve being pierced by a concentric bore. The shoulder 3*,
abuts against the under surface of said wheel 2, and limits the distance said screw-
threaded portion 3b enters said screw-threaded bore 2b, whereby the inner face of
the clutch sleeve 3 is located within the reversing wheel 2, leaving the inner face
of the wheel 2, a straight surface, provided with a clutch-chamber 2°, between the
plane of the inner face of the clutch sleeve 3, and the inner face of the wheel 2.
The clutch-sleeve 3, and the reversing wheel 2 are thus positively connected to
rotate together, and said parts are journaled in the frame 1, by the hub 2ª, fitting
into the counterbore of the hub 18, of the frame 1, the end of the flange 3ª resting
upon the base-plate 1. The frame 1 is provided with studs 4", 5", upon which are
journaled pinions 4, 5, respectively, the stud 5" being of greater height and located
farther from the reversing wheel 2 than the stud 4, so that the pinion 4 will mesh
with the reversing wheel 2, and the double depth transmitting pinion 5 will mesh
with the reversing pinion 4 and avoid engagement with the reversing wheel 2.
The transmitting pinion 5 is preferably shown in the form of a corrugated cylinder,
the driving faces of which are of greater length than the teeth of the reversing
pinion 4, to enable them to extend above said reversing pinion to engage the gear
teeth of a main driving wheel 6. The above group of elements transmits and
reverses motion from the driving wheel 6, to 'reverse the rotation of a
spindle 13.
The driving wheel 6 is shown provided with parallel spur gear-teeth upon its
periphery, the inside working depth diameter of the teeth of said driving wheel 6
being greater than the addendum or outside diameter of the teeth of the reversing
wheel 2, to enable said driving wheel to mesh with said double depth transmitting
pinion 5, and to enable the latter to avoid engagement with the reversing wheel 2,
as aforesaid. From the outer face of the driving wheel 6 projects a hub 6, which
enters a bore in the cover 7 of the main case, and said wheel and cover are held
firmly together by the screw-threaded portion 8* of a shank 8 meshing with the
screw threaded bore 6 of the driving wheel 6, whereby the shoulder 8b confines
the cover 7 between the shoulder 8b and the outer face of the wheel 6, by a close
running fit. It is here seen that, as the shank 8 and the wheel 6 are the only parts
rigidly connected with the means of support, the rigidity and alignment of the
spindle and the whole device depends upon the support that the parts of the device
receive by their bearing upon the wheel 6, which being the largest member of the
gear-train affords an ample support for the inner face of the cover 7 upon the outer
face of said wheel. The clutch chamber 2° enables the internal parts of the device
to bear against each other, to afford mutual support and thus secure a bearing on
both sides of the directly connected supporting and driving wheel 6.
The inner face of the driving-wheel 6, is provided with the concentric bore 6b,
and is shown adapted for frictional contact with a friction disk 9, shown pierced by
a concentric screw-threaded bore 9, to receive the driving end clutch member 10,
shown in the form of a clutch-sleeve similar to the reversing end clutch-member 3,
except that the clutch teeth upon its inner face are provided with both a rotary-
driving face 10" and a longitudinal-driving face 10. The tension of the frictional
contact of the disks 6 and 9 is adjusted by screw-threaded rods 11, which pass
through parallel bores eccentrically located in wheel 6, and meshing with the
internally screw-threaded friction clamping parts or ring 12, to bring said disk 9
with more or less pressure against the friction face of the wheel 6. The cover 7
is shown provided with an aperture or apertures 7b, which register with the heads
of the rods 11 to permit turning of the latter; the cover 7 is also provided with

page_text: screws to enter the screw-holes 1d in the frame 1, to fasten said cover to said
frame. The above group of elements supports and aligns the parts of the device
and drive the spindle 13 in the working direction.
The main spindle 13 may be connected alternately with either of the end clutch
members by a clutch-bar 14 which could be arranged to encounter the rotary-
driving face 10, direct, if desired, but to secure an automatic reversal of the
direction of rotation of said spindle, and to fully illustrate my improved method of
overcoming the "dead centre" in clutch mechanisms, I preferably interpose an
auxiliary clutch sleeve 15 as the intermediate clutch-member having direct
engagement with the end clutches, and employ a clamping sleeve 16, carrying
stops 16, to regulate the action of said intermediate clutch member. The
intermediate clutch-sleeve 15 is pierced by a concentric bore, and provided with
clutch teeth at its opposite ends; those at the end adapted to engage the driving
end clutch member 10 having both a rotary driving face 15, and a longitudinal
driving face 15, while those at the opposite end are, in the "single-acting" device
illustrated, preferably shown of an acute angular form, the opposing surfaces 15d
sloping backward and inward from the outer extremities of their rotary-
driving faces 15, to facilitate their ready engagement with the rotary-driving
faces 3 of the corresponding teeth of the reversing end clutch member 3, to avoid
jamming of the clutch members when moving longitudinally during the coaction of
the longitudinal-driving faces 10%, and 15%, as hereinafter described (see Figures 3
and 4). The rotary-driving faces 10 and 15 are preferably shown extending
inward longitudinally and sloping backward from their respective outer extremities,
or undercut; and the longitudinal-driving faces 10, 15, are preferably shown
extending outward longitudinally beyond and sloping backward from the outer
extremities of their respective associate rotary-driving faces, or made in the form
The sides of the intermediate clutch sleeve 15 are pierced by two
opposing longitudinal slots 15°. The clamping sleeve 16 is preferably made as
shown in Figure 5 to permit strips 16', 'carrying stops or lugs 16, to be sprung
inwards sufficiently to enable stops 16%, to be inserted in the slots 15°. The smaller
end 13 of the spindle 13 passes through the sleeve 15, and between the strips 16º,
to force the stops out into position in the slots 15° (see Figure 1). The end' 13*,
of the spindle 13, continues through the clamping sleeve 16, until the transverse
bore 13 of said spindle registers with the slots 15° of the sleeve 15, when the
clutch-bar 14 is inserted loosely through the slots 15, in sleeve 15 and the
transverse bore in the spindle 13, its length coinciding with the diameter of
sleeve 15, to connect the sleeve 15 with the spindle 13. The lower end of the
clamping sleeve 16 is shown tapered, screw-threaded and slotted, to enable a
nut 16 to clamp saià sleeve 16 in position along said spindle 13, to regulate the
movement of the clutch sleeve 15, as desired, said nut 16° being of such a diameter
as to permit the sleeve 15 to freely slide over it. The diameter of the spindle 13
forms a working fit in the bore of the sleeve 15, above the bottom of the cross-
bar 14, and the clamping sleeve 16 being of the same diameter as the upper part of
the spindle 13 continues the bearing of said spindle in the lower part of said
sleeve 15, and gives it the equivalent of a direct bearing in the opening 1° of
frame 1. The above group of parts thus connected together are the driven
elements that connect the spindle with the driving and reversing clutches and that
regulate the direction of its rotation.
of a cam.
Said parts being assembled as shown the spindle 13 passes into the clutch
chamber 2 of the reversing wheel 2, projects through the bore in the clutch
sleeve 3, and through the bore 1 in the frame 1, which brings the intermediate
clutch member 15 and its connected parts in position in the clutch-chamber 2, the
walls of said clutch chamber 2 acting to retain the loosely fitted clutch-bar 14 in
position in the transverse bore 13 of the spindle and the longitudinal slots 15° of
the sleeve 15. When the cover 7 and its group of driving parts are placed in
position, the upper end of the spindle 13 passes through the bore in the clutch
sleeve 10, and is journaled in the bure 6" of the driving wheel 6; the face of the

page_text: disk 9 bears against the inner face of the reversing wheel 2, to hold said wheel
from rising when,the intermediate clutch is being disengaged from the reversing
clutch; a tool holder or chuck 23 is attached to the spindle 13, and the tool or
tap 24 is held thereby.
The shank 8 is to be rotated, by any suitable means, continuously in one
direction. I have preferably shown the shank 8 inserted in the socket 17ª of a
rotative spindle 17, of a drill press or similar tool, in which said rotative spindle
is journaled in a longitudinally movable, non-rotative sleeve 18, which is supported
by and passes through the stationary frame 21 of the drill press, the sleeve 18
being raised or lowered through the medium of the lever 19, all of which parts
may be of usual or approved construction. To limit the longitudinal movement of
the spindle 17 I have shown a stop-collar 20 clamped to the longitudinally movable
sleeve 18. To cause the pinions 4, 5, to rotate upon their axes to transmit and
reverse the motion from the driving wheel 6, to the reversing wheel 2, the case 1
is held from rotation by a rod 22, which may be held by the operator, or otherwise,
to permit the case 1 to also be longitudinally movable. On rotating the spindle 17
in one direction, say to the right, as the parts of my device are arranged, the
intermediate clutch sleeve or member 15, and the parts connecting it with the
spindle 13, when hanging idly, will assume the position 'shown in Figure 4, and be
turned to the left, or in the opposite direction to the direction of rotation of the
spindle 17, as the intermediate clutch member 15 will be in rotary engagement with
the reversing end clutch 3, and as the driving wheel 6 turns with the spindle 17
its gear-teeth rotates pinion 5, which rotates pinion 4 which latter pinion drives
the wheel 2 and its clutch-sleeve 3, in the opposite direction to that of spindle 17
and wheel 6. The operator, in lowering the lever 19 presses the tap 24 against
the edges of the hole shown in the work 25, and the spindle 13 being thus held
from longitudinal movement, the device descends along said spindle 13 until the
clutch-bar 14, pressing against the top of slot 15 holds the sleeve 15 stationary,
and the rotary-driving faces 10 and 15 are thus pressed into rotary engagement
by hand through the medium of the lever 19 pressing down the driving end clutch
nember 10.
When the driving end clutch member 10 is in rotary engagement with the
intermediate clutch member 15 the motion is transmitting from the spindle 17
through the frictional contact of the inner face of the driving wheel 6 with the
friction disk 9, and theune through the clutch members 10 and 15 and the clutch
bar 1, to turn the spindle 13 in the working direction, and the tap 24 enters the
hole in the work 25. As the tension of the frictional contact between the wheel 6
and the disk 9 drives the tap 24, under normal strain, breakage of the tap 24 will
be avoided, should it meet with undue resistance in the work 25, through the
slipping of said frictional surfaces.
By the eccentric location of the rods 11, in the wheel 6, and the tension exerted
by their threads upon the threads in the relatively non-rotative clamp 12, said
clamp acts as a luck-nut to prevent the rotation of the rods 11, in their respective
bores or bearings in wheel 6, and a self-binding construction of the adjusting
members of the friction mechanism is thus secured, to preserve the tension of the
frictional contact of the parts at the degree adjusted, without lock-nuts or other
means usually required to prevent the rods from slacking back. It will be
understood that, when the wheel 6, and the clamp 12, rotate round the disc 9,
there is no part that rotates around the axis of the rod 11 to allow the latter to
slacken, nor do these rods 11 rotate in their bearings during the operation of the
machine, and hence the parts will remain in the positions adjusted.
The operator, with his hand on the lever 19, continues to follow the longitudinal
movement of the tap 24, by lowering the frame 1, as the spiral teeth of the tap 24
cut threads in the hole in the work 25, until the collar 20 stops the farther
longitudinal movement of the spindle 17, and also of the frame 1. The spindle 17
continuing to rotate, the spiral action of the teeth of the tap 24 continue to advance
the tap 24 into the work 25, and draws the spindle 13, clutch-bar 14, and the

page_text: clamping sleeve 16 longitudinally through and independent of the intermediate
clutch-sleeve 15. The rotary-driving faces 10, 15, being undercut as before
described, the rotary engagement of the clutch members 10 and 15, remains
uninterrupted during the independent longitudinal movement of the spindle and
its parts, until the stops 16, sliding along the longitudinal slots 15 engage
longitudinally with the lower ends of said slots, when the intermediate clutch
member is thereby connected longitudinally with the spindle 13, and tap 24, and
is drawn longitudinally therewith, dragging its rotary-driving faces 15ª out of
rotary engagement with the rotary-driving faces of the end clutch member 10,
until they reach the "point of disengagement" (see Figure 3). The length of
the intermediate clutch member 15, between the outer extremities of the rotary-
driving faces 15 and 15°, at its opposite ends, being less than the shortest distance
between the outer extremities of the rotary driving faces 10, and 3, of the two
end clutch members 10 and 3, when the rotary driving faces 15 pass out of
engagement with the rotary driving faces 10%, the rotary driving faces 15° are not
yet in engagement with the rotary driving faces 3º, and the intermediate clutch
member 15 would remain inactive on a "dead-centre" between the opposing
surfaces of the two end clutch members, did I not provide either one or both of
the clutch members 10, or 15, with a longitudinal-driving face or faces 10° or 15,
extending outwardly longitudinally beyond and sloping backward from the outer
extremity of the respective associate rotary-driving face 10 or 15, by which
addition the extreme length of the intermediate clutch member 15 becomes greater
than the shortest distance between the opposing surfaces of the two end clutch
members 10 and 3, and the intermediate clutch member thus becomes too long to
remain inactive, or on a "dead centre" between the opposing surfaces of the end
clutch members. Therefore, upon the disengagement of the rotary driving
faces 15 from 10 the continued rotation of the driving end clutch member 10, will
cause the longitudinal-driving faces 10, 15b to pass over each other and push the
rotary-driving faces 15° at the other end of the intermediate clutch meinber 15
into engagement with the rotary-driving faces 3 of the reversing end clutch
member 3, whereupon the direction of rotation of the spiudle 13 will be reversed,
and the tap 24 backed out of the hole in the work 25. As the tap 24 backs out
of the work the spiral action of its teeth co-act with the threads it has cut in the
hole in the work 25 and raise the spindle 13, clamping sleeve 16, and clutch-
bar 14, until the clutch bar 14 encounters the top of the slot 15; but in this
position of the parts the continued upward movement of the bar 14, would cause
the opposing faces 10, 15, to bear upon each other while the teeth 15º, 3º, were
still in engagement. To avoid any difficulty that might arise upon the parts
assuming this position, I raise the frame 1, and the teeth 15º, 3º, remain in
engagement and the tap continues to rotate in the reverse direction (see Fig. 4)
until brought against the next piece of work. When the frame is again depressed
and the tap encounters the work, the teeth 15º, 3º, will be disengaged and the
rotary-driving faces 10, 15, again engaged, to cause the tap to rotate in the
working direction, as hereinbefore explained.
If a longitudinal driving face or faces, similar to 10%, or 15%, was added to either
the reversing end clutch 3, or the opposing surface of the intermediate clutch
member 15, the device would be rendered "double-acting,' and upon the
disengagement of the rotary driving faces 3°, 15°, by the backing out of the tap in
the threaded hole, as above explained the longitudinal-driving face so added could
overcome the "dead-centre," and raise the intermediate clutch member until its
rotary-driving faces 15, engaged the rotary-driving faces 10%, of the other end
clutch member 10, and the tap would again be turned in the working direction and
descend into the work.
While the opposing surfaces of the clutch members 10 and 15 pass each other
freely in the position shown in Figure 4, yet they pass so closely as to enable the
longitudinal-driving faces 10b, 15, to force the rotary-driving faces 15° into full
rotary engagement with the rotary-driving faces 3, of the other end clutch

page_text: "
member 3. This is particularly desirable in a "double-acting or horizontally
placed device, although in the vertical "single-acting" device illustrated, gravity,
or the under cutting of the rotary driving faces 15°, 3e, may aid in completing the
engagement of said rotary driving faces whose engagement is primarily caused by
the longitudinal-driving faces at the other end of the intermediate clutch member..
The tendency of clutch members to jam together where the extreme length of the
intermediate clutch member is greater than the shortest distance between the
opposing surfaces of the two end clutch members is readily overcome either by
their form or elasticity; and in this connection attention is called to the advantage
of a curved surface or surfaces (see Figure 4), where the outer extremity or the
"point of disengagement of the undercut rotary-driving face merges into the
longitudinal-driving face, giving an easy action to the parts and facilitating their
ready disengagement.
As stated before, the clutch bar 14, is loosely fitted in the transverse spindle
bore 13 (see Figure 1) and the slots 15, and is held in position therein by the.
retaining walls of the clutch-chamber 2. The clutch bar 14, being preferably
made of unannealed tool steel, gives an elasticity to the clutch mechanism that has
been found in practice to be of great value in overcoming the shock or jar of the
quick engagement of the clutches, to avoid breakage of small taps, which are
necessarily rotated at a high velocity.
When the clutch bar 14 is used alone, without the automatic sleeve 15, the action
of the parts is the same as above explained, with the exception that when the
clutch bar 14 is out of rotary engagement with the rotary driving face 10% of the
clutch sleeve 10, it may remain on a "dead-centre" between the end clutches,
which would necessitate the raising of the case 1 to bring the clutch 3 into
engagement with said bar 14, and the lowering of the case would re-engage the
clutch 10 with the bar 14.
The various details of construction shown and described can be varied or modified
without departing from the spirit of my invention.
Having now particularly described and ascertained the nature of my said
invention, and in what manner the same is to be performed, I declare that what
I claim is
1. The combination of three rotative clutch members located in line and having
rotary-driving faces in their opposing surfaces, certain of said clutch members
having a longitudinal-driving face or faces sloping outward longitudinally beyond
and backward from the outer extremity of said rotary-driving face or faces, certain
of said clutch members having longitudinal movement adapted to engage to rotate
one another, means to disengage said rotary-driving faces, the length of the
intermediate clutch member between the outer extremities of the rotary-driving
faces at its opposite ends being less than the shortest distance between the outer
extremities of the rotary-driving faces of the two end clutch members, and the
extreme length of said intermediate clutch member being greater than the shortest
distance between the opposing surfaces of said end clutch members.
2. The combination of three rotative clutch members located in line and having
rotary-driving faces in their opposing surfaces, certain of said clutch members
having a longitudinal-driving face or faces extending outward longitudinally beyond
and sloping backward from the outer extremity of the respective associate rotary-
driving face or faces, certain of said rotary-driving faces extending inward
longitudinally and sloping backward from their respective outer extremities,
certain of said clutch members having longitudinal movement to engage to rotate
one another, and means to disengage said rotary-driving faces, the length of the
intermediate clutch-member between the outer extremities of its rotary-driving
faces at its opposite ends being less than the shortest distance between the outer
extremities of the rotary-driving faces of the two end clutch members, and the
extreme length of said intermediate clutch member being greater than the shortest
distance between the opposing surfaces of said end clutch members.

page_text: 3. The combination of two end clutch-members, means for rotating said clutch
members in opposite directions, a longitudinally movable intermediate clutch.
member located between said two end clutch members, said clutch members having
rotary-driving faces in their opposing surfaces to turn one another, one of said:
clutch members having a longitudinal-driving face or faces extending outward:
longitudinally beyond and sloping backward from the outer extremity of the
respective associate rotary-driving face or faces, the length of said intermediate
clutch member between the outer extremities of its rotary-driving faces at its
opposite ends being less than the shortest distance between the outer extremities
of the rotary-driving faces of said two end-clutch members, and the extreme length.
of said intermediate clutch member being greater than the shortest distance.
between the opposing surface of said end clutch member, and meaus to disengage
said rotary-driving faces.
4. The combination of a spindle, two rotative clutch members locatel o said
spindle, one of said clutch'members being longitudinally movable on said spindle,
said clutch members having rotary driving faces in their opposing surfaces to turn
one by the other and a stop-piece carried by said spindle and adaptel to engage
longitudinally with said longitudinally movable clutch member to disengage said.
rotary-driving faces.
5. The combination of a spindle, two rotative clutch members located on said
spindle, one of said clutch members being movable longitudinally on said spindle,
said clutch members having rotary-driving faces in their opposing surfaces, one of
said clutch members having a longitudinal-driving face extending, outward
longitudinally beyond and sloping backward from the outer extremity of said.
rotary-driving face, and a stop-piece carried by said spindle and adaptel to engage
longitudinally with said longitudinally. movable clutch member, to disengage said
rotary driving faces.
6. The combination of a spindle, a stop-piece carried thereby, two rotative.
clutch members located on said spindle and having rotary driving faces in their
opposing surfaces to turn one another, one of said clutch-members being longi-
tudinally movable on said spindle and having a slot extenling through part of its
length, said stop-piece being adapted to have longitudinal movement within said
slot to engage its ends to engage or disengage said rotary-driving faces.
7. The combination of two wheels, each of said wheels having a clutch, means.
for rotating said wheels in opposite directions, a spindle, an intermediate clutch
connected to rotate with said spindle and movable longitudinally thereon, one of
said elements having a slot, and a stop-piece carried by said spindle and located in
said slot, whereby said stop-piece is enabled to have longitudinal engagement.
with said spindle clutch.
8. A longitudinally movable spindle, a.wheel and a clutch driven by said spindle,.
combined with another longitudinally movable spindle, another wheel having a
clutch, a non-rotative part carrying gearing to transmit and reverse motion from
one of said wheels to the other, whereby said last mentioned' spindle can be
rotated in opposite directions, and an adjustable stop-piece on one of said spindles
to limit the longitudinal movement of said oppositely rotative spindle.
9. The combination of a wheel, a friction. disk, self-binding means for adjusting
the tension of the frictional contact of said wheel and said disk in accordance with
the work to be done, one of said parts being provided with a positive clutch, a.
spindle, a clutch connected therewith and adapted to engage said first mentioned
clutch, another wheel provided with a clutch, and a casing carrying gearing to.
transmit and reverse motion from one of said wheels to the other,
10. The combination of a wheel having a plurality of eccentrically located.
screw-threaded rods projecting from its face, a disk having frictional contact with
said wheel, located between said rods, and provided with a positive clutch, a
clamping part connected with each of said rods, a longitudinally movable spindle,.
a clutch connected therewith, another wheel provided with; a clutch, and a casing

page_text: carrying gearing to transmit and reverse motion from one of said wheels to the
other.
11. The combination of two wheels journaled in a casing carrying gearing
adapted to secure the simultaneous rotation of said wheels in opposite directions,
one of said wheels having a clutch-chamber 2 within the plane of its inner face, a
positive clutch located in said clutch chamber and connected to rotate with said
wheel, the face of said clutch also lying within the plane of the inner face of said
wheel, another clutch connected with the other of said wheels, a longitudinally
movable spindle having a transverse bore, a transversely and laterally movable
clutch bar located in said transverse bore in said spindle an extending beyond the
periphery thereof into said clutch-chamber between said wheel clutches, the walls
of said clutch-chamber serving to retain said clutch bar in said transverse
spindle bore.
12. The combination of a gear-wheel having a clutch chamber 2° within the
plane of its inner face, a positive clutch located in said clutch-chamber and
connected to rotate with said wheel, the face of said clutch also lying within the
plane of the inner face of said wheel, a longitudinally movable spindle, a clutch
connected therewith, another gear-wheel provided with a clutch, and a non-rotative
part carrying gearing adapted to secure the simultaneous rotation. of said wheels in
opposite directions.
13. The combination of a driving wheel and a reversing wheel, each of said
wheels having gear-teeth upon its periphery, the driving faces of said gear-teeth
being parallel with the axes of said wheels, said axes being concentric, one of said
wheels having a clutch-chamber 2 in its inner face, a positive clutch located in
said clutch-chamber and connected to rotate with said wheel, the face of said
clutch lying within the plane of the face of said wheel, another clutch connected
with the other of said wheels, and an intermediate clutch connected with said
spindle and located in said-clutch-chamber between said wheel clutches, and a non-
rotative part carrying a reversing pinion that meshes with said reversing wheel,
and a double-depth transmitting pinion that meshes with said driving wheel and
with said reversing pinion.
14. The combination of a wheel, a clutch connected therewith, a spindle carrying
a clutch for engagement with said wheel clutch, another wheel having a concentric
screw-threaded bore, a clutch-sleeve provided with a concentric bore for the
reception of said spindle, and having a shoulder and an externally screw-threaded
portion carrying on its inner face a positive clutch, said screw-threaded portion of
said clutch-sleeve being adapted to mesh with said screw-threaded bore in said
wheel, and said shoulder of said clutch-sleeve being arranged to bear upon said
wheel to limit the distance that said screw-threaded portion of said clutch-sleeve
shall enter said screw-threaded bore of said wheel, the depth of said screw-threaded
bore of said wheel being greater than the length of that portion of said clutch-
sleeve which extends from said shoulder of said clutch-sleeve to the inner face of
Baid clutch-sleeve upon which said positive clutch is located, to provide a clutch-
chamber 2 between the inner face of said clutch-sleeve and the plane of the
inner face of said wheel, and a non-rotative casing carrying gearing adapted to
secure the simultaneous rotation of said wheels in opposite directions.
15. The combination of a driving wheel 6, and a reversing wheel 2, each of said
wheels having gear-teeth upon its periphery, the driving faces of said gear-teeth
being parallel with the axes of said wheels, said axes being concentric, each of said
wheels being provided with a clutch, a longitudinally movable spindle, a clutch
connected therewith and located between said wheel clutches, a non-rotative
casing 1 having a cover 7, and studs 4", 5", a reversing pinion 4 journaled on said
stud 4, resting upon the inner face of said casing 1 and meshing with said
reversing wheel 2, and a double-depth transmitting pinion 5, journaled on the
stud 5, and having gear-teeth upon its periphery whose driving faces are of
greater depth (or width) than those of the gear-teeth of the driving wheel 6, the

page_text: inside working depth diameter of said driving wheel 6 being greater than the
addendum (or outside) diameter of the reversing wheel 2, to enable said double
depth transmitting pinion to mesh with said driving wheel 6, and with the reversing
pinion 4, and avoid engagement with the reversing wheel 2, whereby the maximum
bearing surface for the inner face of said cover 7 upon the outer face of said
wheel 6 is secured.
16. The combination of a driving wheel 6, adapted for connection with a rotative
driving part and having gear teeth upon its periphery that are parallel with its
axis, a friction disk to be driven by frictional contact with said wheel, a longi-
tudinally movable spindle, means to connect said disk with said spindle to turn the
latter in one direction, a reversing wheel 2 surrounding said spindle and having
gear-teeth upon its periphery that are parallel with its axis, means to connect
said last mentioned wheel with said spindle to turn the latter in the reverse
direction to that first mentioned, a reversing spindle 4 carried by a non-rotative
casing 1 and meshing with said reversing wheel 2, and a double-depth transmitting
pinion, similarly carried and meshing with the driving wheel 6, and the reversing
pinion 4.
17. The combination of a driving wheel 6 adapted for connection with a
rotative driving part and having gear teeth upon its periphery that are parallel
with its axis, a longitudinally movable spindle, a friction disk to be driven by
frictional contact with said wheel, means to regulate the frictional tension between
said disk and said wheel in accordance with the work to be done, means for
connecting said longitudinally movable spindle with said disk to turn said spindle
in one direction, a reversing wheel 2 surrounding said spindle and having gear-
teeth upon its periphery that are parallel with its axis, means to connect said last
mentioned wheel with said spindle to turn the latter in the opposite direction to
that first mentioned, a reversing pinion 4 carried by a non-rotative casing 1 and
meshing with said reversing wheel 2, and a double-depth transmitting pinion
similarly carried and meshing with the driving wheel 6, and the reversing
pinion 4.
18. The combination of two wheels journaled in a non-rotative casing having a
non-rotative spindle-bearing 1°, in its base plate and carrying gearing adapted to
secure the simultaneous rotation of said wheels in opposite directions, one of said
wheels having a clutch chamber 2° within the plane of its inner face, a positive
clutch located in said clutch chamber and connected to rotate with said wheel, the
face of said clutch lying within the plane of the inner face of said wheel, another
clutch connected with the other of said wheels, and a longitudinally movable
spindle provided with an intermediate clutch and having direct bearing in said
non-rotative spindle bearing in said base-plate of said casing.
19. The combination of two wheels, each of said wheels having a clutch, means
to rotate, one of said wheels, in the opposite direction to the other, a spindle, a
clutch connected to rotate with said spindle and capable of longitudinal movement
thereon, one of said elements having a slot, a clamping sleeve adjustably connected
with said spindle, and a stop-piece projecting from said clamping-sleeve and
meshing with said slot, to engage said spindle clutch longitudinally.
11
•11000
ALLISON BROS.,
Agents for the Applicant.