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Патент USA US2408232

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Sept. 24, 1946.
'
H. A. SKILTON
2,408,231
TILTABLE ROTARY POWER-DRIVEN WORK-HOLDING UNIT
Filed April 10, 1945 ‘
4ySheets-Sheet l
lNVENTOR
HARRY A. Smrron
B1 WMWM
'ATTOR/VEY-S
Sept. 24, 1946.
‘
H. A. SKILTON
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2,403,231
v'I'IL'I'ABLE ROTARY POWER-DRIVEN WORK-HOLDING UNIT
Filed April 10, ‘1945
Y
4 Sheets-SheetZ
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\INIVENTOR
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'-HARRYA.5K|LT0~
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Arrow/mars.
.septiz4, 1-946.
'
H. A. SKILTON
2,408,231
TILTABLE ROTARY POWER-DRIVEN WORK-HOLDING UNIT
Filed April 10, 1945
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25
4 Sheets-Sheet 4
/
ATTORNEYS.
2,408,231
PatentedISept. 24,’ 1946' I
UNITED STATE s PATENT OFFICE }
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2,403,231
‘
. TILTABLE ROTARY POWER-DRIVEN WORK
HOLDING UNIT
1
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Harry'AIQ Skilton, Watertown, Conn.
Application'April 10, 1945,‘ Serial No‘. 587,529
' 13 Claims. (01. 51~237>
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I j Fig.- 5 is a broken horizontal sectional view
The present invention relates to work-hold
ing units and relates more particularly to. work
holding units of a type wherein a table or' other
taken on the line 5-—5 of Fig. 4; and
Fig. 6 is a similar view but taken’ on the line
work-carrying member is rotatable about a givenv I
6-I—B of Fig. 4,,
rotation is tiltable.
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mounting-yoke generally designated by the ref
turn the same topermit the ready and *conven- '
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unit herein
form of the present invention, includes among its
main features 'a base III, a tubular standard I I, a
erence‘ character I2, and awork-holding table I3.
The tubular standard II is arranged vertically
and has its lower end-?rmly anchored in the base
It and'issurmounted at, its upper end bythe
mounting-yoke» I2. The saidmounting-yoke in
ient polishing of their cavities, protuberances, etc,
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chosen for purposes of'making clear a, preferred I
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Thework-holding units of the present inven
tion are primarily designed to holdIdies and to
though-available for other uses.
I -
The' particular work-holding
axis of vrotation and ‘in which the said'axis of
-
vOne of the objects ‘of the present invention is
to vprovide a' superior tiltable rotary' power
driven work-holding unit having its axis of To
cludes a centrally-depending-stem III which ‘is
tation tiltable or changeable inv position to thus .
entered into the interior of the upper end of the
enable work to be turned in the desired path. ' I
Another object of the present invention is to
provide a superior work-holding unit of the type
‘ tubular standard II and may-beirigidly secured
referred to in which the power used to rotate the
. yoke ' I2 ‘also includes’ two’ upwardly-extending
Work-carrying member will not materially tend
to change the position of the axis of rotation of
such member.
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I
therein in any suitable manner; The mounting
20 laterally-spaced-apart armsi I5 and Ilirespec
Itively provided :at their upper ends with horizontal
bearingepassages l1 and I8.
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Mounted respectively in the bearing-passages
A further object of the present invention is to
provide a superior tiltable rotary power-driven
I1 and I8 above referred to, are the tubular trun
able work-carrying member may be readily dis~
connected to permitmanual rotation of the said
tubular'trunnions l9. and 20;are axially aligned
with each other but project outwardly from the
work-holding unit having its parts so constructed 25 nions I9 and 20 ofv a-bearing-head generally des
ignated by the reference character’ 2 I.- v The said
and‘arranged that the power-drive for the tilt- »
respective opposite sides bf: the said ‘bearing
member when desired. I. a
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- Still another objector‘ the presentinvention 30 head »2I.as is especially well shown in Figs. 3
is to provide a'superior work-holding unit of the
type referred to and in which the work-carrying
and 5.
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r The said. tubular trunnions I9 and 20 are axial
lyzin-line with each other and respectively pro
ject outwardly. from the opposite ends of a lug
, With the above and other objects in 'view, as. 35 like trunnion-portion 22 of the said bearing-head
willv appear to those skilled in the artfrom the, ‘ 2 I.; Thesaid bearing-head also includes a tubular
member may be automatically locked against
rotation by the shutting-off of the driving-power.
spindle-portion 23 formed integral with the said
trunnion-portion: 22 but having its axis extending
‘present disclosure, this invention includes allfe'a
Y tures in the said ‘disclosure which arenovel over
thépriorart.
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i' _' the accompanying drawings, in which oer-I
“at a right angle with-respect to the axes of the
40
tubular trunnions I9 and 20.
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‘ Bearing in the spindle-portion“ of the bear
tain modes'of carrying out the present invention
ing-head 2| with capacity for'rotation therein, is
‘are shown for illustrative purposes:
_ .Fig. 1 is a. view in front elevation of a-tiltable
a work-carryingspindle 24>f0rmed‘at its upper
end with an. externally-threaded stem 25 onto
rotary J power-driven work-holding unit’ con 45 which the disk-like Work-holding table l3v is struoted in accordance with the present inven
mounted. .IAt the lower end of its threaded-stem
tion;
7
25, the spindle 24 is formed with a radiallyeex
,
Fig.‘ 2 is a- sideview thereof looking in the
v
tendingvintegral-annular-collar 21 against the
direction of the arrow 2 of Fig. 1;
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’ Fig. 3 is a broken vertical sectional View on
upper face of which the hub 26'of the table I2 en
an enlarged'scale and taken on the line 343 of
bears upon the-upper face, of thehollow spin
dle-portion 23vof the bearingghead, as is especial
Fig.2;
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gages. ' The under face of the integral-col1ar-2l
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Fig. 4 is a broken vertical sectional‘viewon
an enlarged scale and taken‘, on the line"4—_4 of
Fig. 1;
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ly w'ell shown inFigA.
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The extreme lower end of the spindle 24 bears
55
the .lower portion of a "cap .28 forming a clo- I
2,408,231
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sure for the other otherwise-open lower end of the
hollow interior of the spindle-portion 23 of the
bearing-head 2|. The said cap is formed with
said lock-nut is provided with a rigid radially
extending arm 49 which latter terminates at its
outer end in a ball-grip 5B.
Returning now to the bar-like coupling-key 32
which extends diametrically Within the spindle
portion 23 of the bearing-head 2|, it will be noted
by reference to Fig. 4 in particular, that the said
an integral upwardly-extending annular-?ange
29 having its outer periphery snugly ?tting the
interior of the spindle-portion 23, as is shown in
Figs. 4 and 6.
key has centrally threaded into it, the upper end
The internal diameter of the sleeve-like ?ange
29 of the cap 28 is sufficiently larger than the ex
of an operating-plunger 5| which is mounted for
ternal diameter of the lower portion of spindle 10 reciprocation lengthwise of itself axially in the
lower-portion of the spindle 24. The lower-por
24 as to be able to accommodate within it a bush
tion of the said operating-plunger extends below
ing 30. In its upper edge the bushing 30 is
the lower end of the spindle 24 and is provided
formed with two radial clearance-notches; 3'l—3|'
respectively located at diametrically-opposite
‘ with a handle 52 which is accommodated partly
points in the bushing 33 and intersecting the up 15 or wholly within the space between the vertical
arms I5 and I6 of the normally-stationary
per edge thereof.
mounting-yoke i2, dependent upon the position
The clearance-notches 3|—'3'| in the bushing
to which the entire bearing-head 2| is tilted.
30 are adapted to respectively receive the oppo
For the purpose of yieldingly holding the oper
site ends of a bar-like coupling-key 32 which ex
tends lengthwise through a diametrical-passage 20 ating-plunger 5| in either one of two vertical
positions, the said operating-plunger is formed
33 formed in the lower-portion of the spindle ‘24.
in its periphery with two annular detent-grooves
The said passage 33 has a vertical‘ extent but
respectively designated by the reference charac
slightly less than double the vertical extent of
ters 53 and 54.. The said detent-grooves are al
the coupling-key 32 for the purpose of permitting
ternately adapted to receive a ball-'detent 55
the said- coupling-key to be bodily moved verti
mounted in a radial-passage 56- formed in the
cally, for purposes as will hereinafter appear.
lower-portion of the spindle 24, as is shown in
Fig, 4. The said ball-detent is urged toward the
operating-plunger 5| by a helical detent-spring
Resting upon the upper edge of the bushing 39
is the lower edge of a hub 34 formed integral
with and depending from a wormwhea 35. The
unit consisting of‘ tnesaid worm-wheel 35 and
its hub 34 is formed’ withqan axial bearing-pas
sage which ?ts the periphery of the spindle 24
with freedom for rotation _'re1ative thereto and
for purposes as will hereinafter appear; The hub
34 is formed in its lower edge with two radial and
downwardly-opening coupling-notches or recesses
36—_35 respectively located at diametrically-op
- posite points and adapted to receive the respec~
tive opposite ends of the coupling-key 32. for
30
51.
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The bearing-head 2| is. preferably formed with
a rearwardly-extending integral arm 58 project
ing through the space between the comp'lemental
arms |5 and I6 of the mounting-yoke l2. At its
rear end’ the said arm 58 has the upper‘ end of a
rod 59 rigidly coupled to it. Mounted on the rod
with capacity for vertical adjustment is a
counterweight 6!), for purposes as- will hereinafter
appear.
'
Encircling the upper-portion of the tubular
purposes as will hereinafter appear.
' 40
standard H is the hub 6| forming an integral
The worm-wheel 35 meshes with and is driven
feature of a radially-extending bracket 62 upon
by a worm 31 extending horizontally in the trun
which may be conveniently mounted a suitable
mien-portion 22 of the bearing-head 2|, as is espe
motor-driven ?exible-shaft unit (not shown) to
cially well ‘shown in Figs. 3, f1 and 5. Respec
tively extending outwardly from the oppositev ' be utilized for grinding or polishing such dies as
may be secured to the upper face of the work
‘ends of the worm 3? are stub-shafts 38 and 39
holding table l3 before referred to.
both forming a rigid feature of the said worm
Operation
and arranged coaxially with respect thereto.
The stub-‘shafts 38 and 39 respectively turn in
For purposes of description, let it be assumed
the interiors of the tubular tfurinions l9 and 20 50 ’ that the coupling-key 32 is in its lowermost posi
of the bearing-head 2|.
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The outer end of the stub-shaft 39 of thev worm
37 has rigidly mounted thereon- a V'-belt pulley
M which may have a plurality of grooves therein
respectively of different diameters and which is
adapted to receive a v-belt‘ll which servestto
drive the said pulley 40 and hence also to drive
the worm 31. The lower-portion of the V-belt
4| extends around a V-belt pulley“ which may
also have a plurality of grooves of different diam
eters respectively and which is mounted upon and
driven by the drive-shaft 43 of an electric motor
44. The said electric motor 44 is supported on
the upper surface of a‘ motor-bracket 4'5 adja
cent the outer end thereof. The said motor
bracket is formed at its innerlend with a tubular
portion 45 through which the lower-portion of
the tubular standard || extends. The said mo
tor-bracket‘ 45 may, if desired; be vertically ad
justed on the standard |__| to suitably regulate
the tension of the V-belt 4| or its equivalent.
The tubular trunnion I9 of the bearing-head
2| projects axially beyond the arm l5 of the
mounting-yoke l2 and is externally threaded as
at 41 to threadedly receive a lock-nut 48. The
tion as shown in Fig. 4 and that the electric mo
tor 44 is energized,
Under the above described conditions the motor
44 through the intermediary of the V-belt 4|,
pulley 4i! and stub-shaft 39, turn the worm 31.
The worm 31 will drive the worm-wheel 35 which
under these conditions will turn loosely on the
work~carrying spindle .24, inasmuch as the cou
pling-key 32 is disengagedv from the coupling
notches 36—36 in the hub 34 of the said worm
wheel.
Should it now be desired to drive the work
holding table l3, the coupling-key 32 may be
shifted upwardly into the coupling-notches
36—-36 in the hub 34, by pressing upwardly upon
the handle 52 of the operating-plunger 5|. As
soon as the coupling-key 32 enters the said cou
pling-notches 3B—36, it will be coupled to and
driven by the worm-wheel 35 and since it ex
tends through the diametrical passage 33- the said
coupling-key will in turn drive the spindle 24 and
hence also the table l3. Thus a die or other ar
ticle secured to the upper surface of the table
|3 may be turned while being polished, dressed
or otherwise operated upon.
2,408,231
Should it be desired vto tilt the table l3 so as
to cause the same to rotate about an inclined axis,
thelock-nut 48 on the tubular trunnion IQ of the
bearing-head 2|, may ‘be loosened. Following
this operation the entire bearing-head 2| may be
turned about the worm as a center during‘ which
operation‘ the tubular trunnions l9 and 20 will
turn respectively in the‘bearing-passages l1 and
6
inner end of its said tubular trunnion; drive
means projecting through the tubular trunnion
of the said bearing-‘head and connected to the
said ?rst gear-member for driving the same; a
substantially-vertical work-carrying spindle
mounted in the said bearing-head for rotation
about an axis disposed at substantiallya right
angle with respect to the axis of the tubular
trunnion of the bearing-head; a second gear
[8 of the mounting-yoke I2. After the bearing
head 2| and the parts carried thereby have been .10 member also carried by the saidbearing-head
tilted into the desired position, the lock-nut 48
may again be tightened by means of its arm 49
whereupon the new setting of the said bearing
head may be ?xed. During the tilting of the
bearing-head“ and the parts carried thereby,
the counterweight 60 carried-by its arm 58 and ,
- rod 59 will, when the said counterweight is prop
and meshing with the said ?rst gear-member;
and releasable coupling-means operatively inter
posed between thesaid drive-means and the said
substantially-vertical spindle to selectively ‘con
nect and disconnect the ‘same; the said bearing‘
head, second gear-member and work-carrying
spindle being jointly tiltable about the axis of
erly adjusted,- render the said bearing-head and ‘ .the said tubular trunnion.
3. A tiltable rotary power-driven work-holding
parts carried thereby su?iciently stable so that
unit, including in combination: 'a support having
the same will not of their own weight materially
two‘ axially-spaced-apart bearings; a tiltable
bearing-head having two 'axially-spaced-apart
Now should it he desired for anyreason to lock
tubular trunnions respectively mounted for cs
the table i3 against rotation while a special op
cillation in the bearings of the said support; a
eration is being performed, all that is required
is to stop the electric motor 44 whereupon the ‘ ?rst gear-member carried‘ byrthe said bearing
head and located intermediate the respective in
self-locking engagement between the'worm-wheel
ner ends of the tubular trunnions thereof; drive
35 and the worm 31 will serve this purpose. ‘
,
means
projecting through one Of the tubular
Should it be desired to leave the work-hold
trunnions of the said bearing-head and connect
ing table l3 free for manual rotation, all that is
ed to the said ?rst gear-member for driving the
required to effect this result is to lower the cou- ‘
same; a spindle mounted in the said bearing
pling-key 32 into the position in which it is shown
head for rotation about an axis disposed at an
in Fig. 4, to thereby uncouple the spindle 24 from
angle with respect to the axes of the tubular
the worm-wheel 35. The uncoupling just re
trunnions of the bearing-head; a second gear
ferred to, may be achieved whether or not the
member also carried by the said bearing-head and
worm-wheel 35 is at the time being driven.
meshing
with the said ?rst gear-member; and
The invention may be carried out in other spe
releasable coupling-means operatively interposed
tend to
shift,
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ci?c ways than those herein set forth without de
between the said drive-means and the said spin
parting from the spirit and essential characteris
dle to selectively connect and disconnectv the
tics of the invention, and the present embodi
the said bearing-head, second gear-mem
merits are,'therefore, to be considered in all re 40 same;
ber and work-carrying spindle being jointly tilt
spects as illustrative and not restrictive, and all
ableabout the axes of the two said tubular trun
changes coming within the meaning and equiva
lency range of the appended claims are intended ' nions.
4. A tiltable rotary power-driven work-holding
' to be embraced therein.
45 unit, including incombination: a support hav
I claim:
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4
ing two axially-spaced-apart substantially-hori
1. A tiltable rotary power-driven work-holding
zontal bearings; a tiltable bearing-head having
unit, including in combination: a support hav
two axially-spaced-apart tubular trunnions re
ing a bearing; a tiltable bearing-head having a
spectively mounted for oscillation in the substan- _
tubular trunnion mounted for oscillation in the
tially-horizontal bearings of the said support; a
bearing'of the said support; a ?rst gear-mem 50 ?rst gear-member carried by the said bearing
ber carried by the said bearing-head adjacent the
head and located intermediate the respective in
inner end of its said tubular trunnion; drive
ner ends of the tubular trunnions thereof; drive
means projecting through the tubular trunnion of ‘
means projecting through one of the tubular
the said bearing-head and connected to the said
trunnions of the said bearing-head and connect
?rst gear-member for driving the same; a ‘work
ed to‘the said ?rst gear-member for driving the
carrying spindle mounted in the said bearing
same’; _ a substantially-vertical work-carrying
head for rotation about an axis disposed at an
spindle mounted in the said bearing-head for ro-‘
angle ‘with respect'to the axis of the tubular
tation ‘about an axis disposed at substantially a
trunnion of the bearing-head; a second gear
right angle__with respect to the axes of the said
member also carried by the said bearing-head and
tubular trunnions; 'a' second gear-member also
meshing with the said first gear-member; and re- '
carried by the? said vbearing-head and meshing
leasable coupling-means operatively interposed
with the said ?rst gear-member, the said second
between the said drive-means and the said spin
dle to selectively connect and disconnect the
same; the said bearing-head, second gear-mema
ber and work-carrying spindle being jointly tilt
able about the axis of the said tubular trunnion.
gear-member being operatively associated with
the said substantially-vertical spindle for turn
ing the'same; and releasable coupling~means op“
'eratively interposed between the said drive
means and the said substantially-vertical spindle
to selectively connect'and disconnect the same;
2; A tiltable rotary power-driven work-holding
unit, including in combination: a support hav 70 the said bearing-head, second gear-member and
ing a substantially-hormonal bearing; a tiltable
work-carrying spindle being jointly tiltable about
. the axes of the two said tubular trunnions.
bearing-head having a tubular trunnion mount
‘5; Atiltable rotary power-driven work-holding
ed for oscillation in the substantiallyehorizontal
unit,
includingin combination: asupport having
bearing of the said support; ‘a ?rst gear-member
a
bearing;
a tiltable bearing-head having raptu
carried by- the said bearing-head adjacent the 75
2,408,231
8
bular trunnion mounted for oscillation in the
side of and at substantially a right angle with
bearing of the said support; a worm carried by
the said bearing-head adjacent the inner end
of its said tubular trunnion; drive-means pro
jecting through the tubular trunnion of the said
,respect to'the axis of the tubular trunnion of
bearing-head and connected to the said worm
for driving the same; a work-carrying spindle
worm; and releasable coupling-means operative
ly interposed between the said drive-means and
the bearing-head in non-intersecting relation
ship thereto; a worm-wheel also carried by the
said bearing-head and meshing with the said
mounted in the said bearing-head for rotation
the said substantially-vertical spindle to selec
about an axis disposed to one side of and at an an
tively connect and disconnect the same; the said
gle with respect to the axis of the tubular trunnion 10 bearing-head, worm-wheel and work-carrying
of the bearing-head in non-intersecting relation
spindle being jointly tiltable about the axis‘ of
ship thereto; and a Worm-wheel also carried by
the said tubular trunnion. ‘
the said bearing-head and meshing with the said
-- 9.- A tiltable rotary power-driven work-holding
worm, the said worm-wheel being operatively
unit, including in combination: a support having
associated with the said spindle for turning the
two axially-spaced-apart bearings; a tiltable
same; the said bearing-head, worm-Wheel and
bearing-head having two axially-spaced-apart
work-carrying spindle being jointly tiltable about
tubular trunnions respectively mounted for os
the axis of the said tubular trunnion.
cillation'in the bearings of the said support; a
6. A tiltable rotary power-driven work-holding
worm carried by the said bearing-head and lo
unit, including in combination: a support having 20 cated intermediate the respective inner ends of
a bearing; a tiltable bearing-head having a tubu
the tubular trunnions thereof; drive-means pro
lar trunnion mounted for oscillation in the bear
.jectingthrough one of the tubular trunnions of
ing of the said support; a worm carried by the
the said bearing-head and connected to the said
said bearing-head adjacent the inner end of its
worm for driving the same; a work-carrying spin
said tubular trunnion; drive-means projecting
die mounted in the said bearing-head for rota
through the tubular trunnion of the said bear
tion about an axis disposed to one side of and
ing-head and connected to the said worm-wheel
at an angle with respect to the axes of the tubu
for driving the same; a work-carrying spindle
lar trunnions of the bearing-head in non-inter
mounted in the said bearing-head for rotation
secting relationship thereto; and a worm-wheel
about an axis disposed at an angle with respect 30 also carried by the said bearing-head and mesh
to the axis of the tubular trunnion of the bear
ingwith the said worm, the said worm-wheel
ing-head; a worm-wheel also carried by the said
being operatively associated with the said spin"
bearing-head and meshing with the said worm;
die for turning the same; the said bearing-head,
and releasable coupling-means operatively in
Worm-wheel and work-carrying spindle being
terposed between the said drive~means and the
jointly tiltable about the axes of the two said
said spindle to selectively connect and disconnect
tubular trunnions.
the same; the said bearing-head, worm-wheel
10. A tiltable rotary power-driven Work-hold
and work-carrying spindle being jointly tiltable
ing unit, including in combination: a support
about the axis of the said tubular trunnion.
having two axially-spaced-apart bearings; a tilt
7. A tiltable rotary power-driven work-holding 40 able bearing-head having two axially-spaced
unit, including in combination: a support having
apart tubular trunnions respectively mounted for
a substantially-horizontal bearing; a tiltable
oscillation in the bearings of the said support;
bearing-head having a tubular trunnion mounted
a ‘worm carried by the said bearing-head and
for oscillation in the substantially-horizontal
located intermediate the respective inner ends
bearing of the said support; a worm carried by 45 of the tubular trunnions thereof; drive-means
the said bearing-head adjacent the inner end of
projecting through‘one of the tubular trunnions
its said tubular trunnion; drive-means projecting
of the said bearing-head and connected to the
through the tubular trunnion of the said bearing
said worm for driving the same; a spindle mount
head and connected to the said worm for driving
ed in the said bearing-head for rotation about
the same; a substantially-vertical work-carrying
an axis disposed at an angle with respect to the
spindle mounted in the said bearing-head for
axes of the tubular trunnions of the bearing
rotation about an axis disposed to one side of and
head; a worm-wheel also carried by the said
at substantially a right angle with respect to the
bearing-head and meshing with the said worm;
axis of the tubular trunnion of the bearing-head
and releasable coupling-means operatively inter
in non-intersecting relationship thereto; and a
posed between the said drive-means and the said
worm-wheel also carried by the said bearing-head
spindle to selectively connect and disconnect the
and meshing with the said worm, the said worm
same; the said bearing-head, worm-wheel and
wheel being operatively associated with the’ said
Work-carrying spindle being jointly tiltable about
substantially-vertical spindle for turning the
the axes of the two said tubular trunnions.
same; the said bearing-head, worm-wheel and
11. A tiltable rotary power-driven work-hold
work-carrying spindle being jointly tiltable about
ing unit, including in combination: a support
the axis of the said tubular trunnion.
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8. A tilta'ble rotary power-driven work-holding
unit, including in combination: a, support having
having two axially-spaced-apart substantially
horizontal bearings; a tiltable bearing-head hav
ing two axially-spaced-apart tubular trunnions
a substantially-horizontal bearing; a tiltable 65 respectively mounted for oscillation in the sub
bearing-head having a tubular trunnion mounted
stantially-horizontal bearings of the said sup
for oscillation in the substantially-horizontal
port; a worm carried by the-said bearing-head
bearing of the said support; a worm carried by
and located intermediate the respective inner
the said bearing-head adjacent the inner end of
ends of the tubular trunnions thereof; drive
its said tubular trunnion; drive-means projecting 70 means projecting through one of the tubular
through the tubular trunnion of the said bear
trunnions of the said bearing-head and con
ing-head and connected to the said worm for
driving the same; a, substantially-vertical work
carrying spindle mounted in thesaid bearing
nected to the said worm for driving the same; a
substantially - vertical
work - carrying
spindle
mounted in the :said bearing-head for rotation
head for rotation about an axis disposed‘to one 75 about an ‘axis ‘disposed to one side of and at sub
V v2,403,231
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said substantially-vertical spindle to selectively,
stantially a right angle with respect to the axes
of the said tubular trunnions in ‘non-intersecting
connect and disconnect the same; the said bear
ing-head, Worm-wheel and work-carrying spin
relationship thereto; and a worm-wheel also car
ried by the said bearing-head, and meshing with
the said warm, the said worm-wheel being oper
.dle being jointlytiltable about the axes of the .
atively associated with the said substantially
vertical spindle for turning the same; the said
13. A tiltable rotary power-driven work-hold
ing unit, including in combination: a support
bearing-head, VworIn-Wheel and" ‘work-carrying
havingva bearing; a tiltable bearing-head hav
ing a‘ tubular trunnion mounted for oscillation
10 in‘ the bearing of the said support; a ?rst gear
spindle beingrjointly tiltable about the axes of
the two said tubular trunnions.
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two said tubular trunnions.
12. A tiltable rotary power-driven work-hold
,
v
member carried by the said bearing-head adja
ing unit, including in combination: a ‘support
cent the inner end ‘of its said tubular trunnion;
having two axially-spaced-apart substantially
horizontal bearings;-a tiltable bearing-head hav
ing two axially-spaced-apart tubular trunnions
drive-means projecting through the tubular
trunnion of the said bearing-head and connected
to‘the said ?rst gear-member for driving the
‘ respectively mounted for oscillation in the sub
stantially-horizontal bearings ‘of the said sup—'
port; a worm carried by the said bearing-head
and located intermediate the respectiveinner _
same; a Work-carrying spindle mounted in the
said bearing-head for rotation about an axis dis
posed at an angle with respect to the axis of the
tubular trunnion of the hearing-head, the said
ends of the tubular trunnions ‘thereof; drive 20 spindle being formed with a transverse key-re
ceivingipassage; a second gear-member encir
means projecting through one of the tubular‘
cling the said spindle and meshing with the said
trunnions of the saidbearing-head and connect
' ed to the said worm' for'driving the same; a sub- -
?rst gear-member, the said second gear-member
stantially-vertical work-carrying spindle mount
‘being formed with a key-receiving notch; and a
ed in the said bearing-head for rotation about an
axis disposed at substantially a right angle with
through the said spindle and movable in a direc
respect to the axes of the said tubular trunnions;
a worm-wheel also carried by the said bearing
head and meshing with the said worm, the said
and out of the key-receiving notch in the said
transverse coupling-key extending transversely
tion paralleling the axis of the said spindle into
second gear-member to respectively couple and
worm-wheel being operatively associated 'withthe 30 uncouple the said second gear-member from the v
said spindle.
said substantially-vertical spindle for turning the
HARRY A. SKILTON.
same; and releasable coupling-means operatively
interposed between the said.‘ drive-means and the
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