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Патент USA US3084909

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April 9, 1963
|_. A. DEVER ETAL
3,084,899
MANUAL THREE DIRECTION TRACER
Filed Oct. 2-1, 1957
4 Sheets-Sheet l
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IN VEN TOR-S‘
LEW/S A. DEVER
BYCHARLES /_. GSC'H WIND.
ATTORNE Y8 .
April 9, 1963
L. A. DEVER EI‘AL
3,084,899
MANUAL THREE DIRECTION TRACER
Filed Oct. 21, 1957
4 Sheets-Sheet 3
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ATTORNEYS.
April 9, 1963
3,084,899
‘IL. A. DEVER ETAL
MANUAL THREE DIRECTION TRACER
Filed Oct. 21, 1957
4 Sheets-Sheet 4
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INVEN TORS‘
LEW/5‘ A7. DEl/ER
BY CHARLES‘ L. GSOH W/ND .
HT TORNEYS .
ti
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3,984,899
Patented Apr. 9, 1963
2
3,084,899
MANUAL TE DIRECTIQN TCER
Lewis A. Dever and Charles L. Gschwind, Cincinnati,
Ohio, assignors to The Cincinnati Miiling Machine (30.,
' Cincinnati, Ohio, a corporation of Ohio
Filed Oct. 21, 1957, Ser. No. 691,255
14 Claims. (Cl. 251—3)
This invention relates to pattern controlled machine
tools and more particularly to tracer control mechanism
therefor.
One of the objects of this invention is to provide a new
and improved hydraulic tracer control mechanism having
housing, the reference numeral 11 indicates the upper
housing and the reference numeral 12’ indicates the cap
structure, all of which make up the assembled structure
of the tracer head of this invention. In the present in
vention the tracer mechanism is adapted to control rela
tive movement in three directions between a tool and
work support of a pattern controlled machine, and it is
common practice in such machines that a separate prime
mover be provided for effecting each of the directions of
movement. This mechanism is devised to control the
joint or several operation of these prime movers, and to
this end there are provided three control valves, one for
each direction of movement.
It is to be understood that it is preferable that this
a de?ectable tracer which may be manipulated to effect
relative movement between a tool and work in two di~ 15 device be mounted on a machine and so oriented that
rections or three directions simultaneously.
Another object of this invention is to provide a new
and improved construction of a tracer head, in which all
the control valves are arranged parallel to the tracer
the tracer ?nger 13, shown in FIGURE 1, has its three
primary directions of movement arranged parallel to the
movements of the three primary slides of the machine
which eifect the relative movement between the tool and
spindle. Since, in normal operation, it is preferred that 20 the work whereby the tracer ?nger is directional, and
a tracer spindle be arranged in a vertical position, this
means that the Weight of the valve members acts axially
thereof rather than laterally, as prevalent in the prior art,
movement of it in a given direction will produce move
ment in that direction. For instance, if the machine has
a slide, such as 14, shown in FIGURE 10‘ which may be
considered, for example, as the work support which is
have a chance to maintain a more central position in their 25 guided lfO‘I' reversible movement in the direction of the
thereby reducing friction in operation, and the valves
sleeves, thus improving the hydraulic operation.
A further object of this invention is to provide a new
arrow :15, the device of this invention is so mounted on a
machine that the tracer 13 is de?ectible in the plane of
and improved means for operating the tracer spindle from
the arrow 15 so that de?ection of the tracer in that plane
either end, so that the same direction of force applied to
will produce movement in that plane. Likewise, de?ec
either operating means will produce a common resultant 30 tion of the tracer at right angles to this plane in the
direction of operation of the controlled motors.
direction of the arrow 16 will produce movement only in
A further object of this invention is to provide a new
the plane of the arrow .16. The tracer 13 is also subject
and improved device of the character described in which
to axial movement in the direction indicated by the arrow
the rates of movement in any of the directions may be
1-7 which is at right angles to the plane containing the
conveniently controlled at one station both as to feeding 35 arrows 15 and 16 so that axial movement of the tracer
rates and rapid traverse rates and that the rapid traverse
will produce movement perpendicular to the table.
rates can only be effected when the tracer is lifted vfrom
As shown in FIGURE 6, the control valves indicated
the pattern.
generally by the reference numerals 18‘ and 19 control
the movements in the directions '15 and 16 respectively,
and improved hydraulic tracer control mechanism having 40 while the vertical control valve indicated generally by the
Another object of this invention is to provide a new
a de?ectable tracer which may be manually controlled for
following the contour of a pattern.
reference numeral 20 controls the movement in the direc
tion 17 perpendicular to the plane of movements 15 and
Other objects and advantages of the present invention
16. The tracer spindle 21, shown in FIGURES 2 and
should be readily apparent by reference to the following
4, is connected to an actuator plate 22 which, in turn,
speci?cation, considered in conjunction with the accom 45 is operatively connected to the valves 18 and 19‘ in such
panying drawings forming a part thereof, and it is to be
a manner that tilting of the tracer ?nger 13 in one plane
understood that any modi?cations may be made in the
will operate the valve '18 without disturbing the valve 19,
exact structural details there shown and described, within
or it is de?ectible in a second plane whereby it will
the scope of the appended claims, without departing from
operate the valve 19 without disturbing the valve 18.
.50 Similarly, axial movement of the tracer spindle 21 will
or exceeding the spirit of the invention.
Referring to the drawings in which like reference
effect actuation of the vertical control valve 20 without
numerals indicate like or similar parts:
disturbing the valves 18 and 19.
FIGURE 1 is a view in elevation of the tracer control
Each of the horizontal control valves 18 ‘and 19 are of
the same construction, and as shown in FIGURE 2, the
FIGURE 2 is a section on the line 2-—2 of FIGURE 1. 55 control valve 18 comprises a valve plunger 23 which is
FIGURE 3 is a section on the line 3-3 of FIGURE 11.
slidably mounted in a bushing 24. Each of the bushings
FIGURE 4 is a section on the line 4-4 of FIGURE 2.
24, as shown in FIGURE 6, is spring urged axially by a
' FIGURE 5 is a detail section on either of the lines 5—5
?at spring member 25 which has a turned edge 26 that
of FIGURE 4.
bears against the ?at surface 27 of the upper housing 11,
FIGURE 6 ‘is a section on the line 6——6 of FIGURE 2. 60 and also turned edges 28 and 29 which bear against the
sleeves 24. A clamping screw 30 and washer 31 are
FIGURE 7 is a detail view partly in sect-ion showing
threaded in the surface 27 to exert pressure of the spring
the feed-rapid traverse selector.
member 25 on the ends of the bushings.
FIGURE 8 is a detail section on the line 8—~—8 of FIG
As shown in FIGURE 5, each bushing bears against an
URE 7.
65 adjustable rod 32 which is slidable in a ?xed sleeve 33
FIGURE 9 is a detail view on the line 9—9 of FIG
which has an adjustable set screw 34 threaded in the
URE 7.
.
end thereof and provided with a lock nut 35. The object
FIGURE 10‘ is a diagrammatic view showing the di
unit of this invention.
-
of this arrangement is that the sleeve may be adjusted
rections of control with respect to a work support.
relative to the ports in the valve plunger. Each sleeve 24
Referring to the drawings, there is shown, in FIGURE 70 has a central annular groove 36 in which is formed ports
1, a view in elevation of an embodiment of this invention
in which the reference numeral 10‘ indicates the lower
37 and which serves as a pressure supply groove. There
are also terminal grooves 38 and 39 of similar construc
aosasss
4
tion which are connected by interdrilling to a reservoir
line. Between the central groove and the terminal
grooves are two motor supply grooves as and 41. The
valve plunger 23 is slidable in the bushing and is pro
vided with a central groove 42 and end grooves 43 and
44 which provide annular lands 45 and 46- which control
the connection of the pressure groove 36 to the motor
grooves 49 and 41.
tracer spindle 21, and engages a shoulder 81 formed on
the upper end of the valve plunger 79. The spring is
interposed between this shoulder and a plate 8.2 which is
secured to the upper end of the valve bushing 83 by
suitable means such as the screws 84. The bushing 83
has a central pressure port 35 and exhaust ports 86 and
87 at either end thereof. Between the pressure port and
the exhaust ports are two motor ports 88 and 89 which
are suitably connected by interdrilling to the hydraulic
The valve plunger 23 has a central bore 47 in which
is slidably mounted a spherical ended plunger 48 for en 10 motor which controls the vertical movement.
gagement with the actuator plate 22. The lower end of
the valve plunger is provided with a lateral slot 4‘? in one
side of which is mounted a ball 5d which bears against
Any con
nection of these ports is controlled by the annular grooves
9d, 91 and 92 formed in the valve plunger.
With respect to the operation of this device, atten
tion is ?rst invited to the fact that in the drawings the
the underside of the plate 22. A strong spring 51 bears
against the plunger 48 to securely clamp the valve plunger 15 parts are all shown in such a position that all the valves
are in a neutral or stop position and therefore all of the
to the plate 22 by substantially point contact whereby
slides controlled thereby are stationary. For ordinary
tilting of the plate 22 to move the plunger axially will
pro?ling operations which are usually carried out in one
not €X€TL a side thrust on the valve plunger and cause it
plane, such as the horizontal plane, it would only be
to bind in its bore. The spring 51 is backed up by a rod
52 and suitable set screws 53 mounted in the bore 47 of 20 necessary to utilize the two valves 18 and 19' while the
vertical valve would remain in its neutral position. In
the plunger. It will now be seen that due to the nature
that case the dial 61 is rotated in such a direction as to
of the construction by which the valve is clamped to the
provide clearance between the conical surface 62 and the
actuator plate 22, that there is no means for adjusting
member ‘63 which thus provides space to permit lateral
the axial position of the valve plunger to align the valve
spools with the ports in a neutral position, and therefore 25 de?ection of the tracer spindle. The further this adjust
ment is made, the greater the distance that the tracer
the adjustment is made in the bushings as just described.
spindle can be deflected and thus the greater the rate of
It will now be seen that the valve plungers of valve 18
relative movement between the cutting tool and the work.
and 19 are connected to the actuator plate 22, and these
It will be noted that this adjustment can be made with
about the center of the tracer spindle 21, and therefore 30 out disturbing the vertical control valve.
If it is desirable to retract the tracer plunger upward
the plate 22. may be considered as having two right angu
at any time, the knob 68 is turned which shifts the sleeve
lar related legs or levers connected to the plungers so
63 upward ‘and immediately enlarges the space betwee
that either plunger may be actuated without causing actu
the surface 62 and the member 63, which means that the
ation of the other.
The actuator plate 22 has a spherical bearing surface 35 slides could be immediately traversed at a rapid rate.
When the sleeve 63 is adjusted vertically it carries a
54 which rides on a spherical seat 55 formed in a sup
self-centering washer 93 which engages a cross pin 94
porting plate 56 which is secured to the top of opening 57
which is mounted in the tracer spindle 21. This pin
formed in the lower housing it} by screws 5'3. The plate
passes through an elongated hole 95 formed in the sleeve
has an integral elongated sleeve 59‘ which is externally
threaded on its lower end at 69 to which is attached a 40 71 and also an elongated hole 96 in the sleeve 59‘ to
valves are spaced 90‘ degrees apart on a circumference
feed rate dial 61. The feed rate dial has a conical sur
face 62, formed on the upper side thereof which bears
against a feed-rapid traverse selector sleeve 63 which is
slidably mounted in the bore 57. This sleeve has an an
permit movement of the pin Without disturbing these
parts. It will, therefore, be seen that upward movement
of the sleeve 63 will cause the pin 94 to move the tracer
spindle 21 upward, and thereby shift the vertical valve
nular groove 64 in which is titted an eccentric pin 65, 45 above its neutral position and raise the tracer out of en—
gagement with the pattern.
shown more particularly in FIGURE 7, and integrally
It is noted by this construction that for normal tracing
formed on the end of a rod 65 mounted in a bore 67
operations in a horizontal plane that the rate of move
formed in the lower housing 1%. The member 66 has an
operating knob 68 integrally attached thereto. Locking
screws 66’, FIGURE 9, having a reduced end 67' ?tting
groove 68' in rod 66' hold the rod in place. A spring
pressed detent ball ‘69', shown in FIGURE 8, serves to
hold the rod in either one of its two positions.
A spring 6h is interposed between the members 61 and
63 which functions to hold the bearing surfaces 54 and S5
of the plate 22 in engagement. The sleeve 59 has an in
ternal bore 70 in which is mounted an anti-friction sleeve
7i which acts as a retainer for the anti~friction balls 72
that form a close ?t between the bore 7% and the cylindri
cal surface 73 of the tracer spindle 21. The anti-friction
sleeve 71 is of su?icient length that lateral movement of
the tracer spindle will effect lateral movement of the
sleeve 59 and thereby de?ection of the actuator plate 22.
This anti-friction means also permits free axial move
ment of the tracer spindle 21 with respect to the sleeve, 65
ment between tool and work be con?ned to a feed rate
and that fast rapid traverse rates only be permitted when
the tracer has been retracted from the pattern such as
for positional movements.
When it is desired to trace in three directions simul
taneously then both of the dials 61 and ‘74 are adjusted,
and adjustment of the dial 74 downward Will permit move
ment of the vertical control valve downward below its
central or stop position. The parts will move down until
the tracer engages some form of pattern surface which will
push the tracer back and cause retraction of the shoulder
76 from the shoulder on the vertical rate dial 74 until
the valve is moved back to a stop position. The operator
may then de?ect the tracer manually to cause it to follow
a horizontal pro?le while at the same time the end of the
tracer ?nger is hearing on another pro?le surface which
controls the movement in a vertical direction.
It will now be seen that the spring 80‘ which holds the
and this movement is limited in a downward direction
by a vertical feed rate dial 74 which is threaded internally
depth valve plunger against the shoulder on the tracer
in the lower end of the sleeve ‘5d and is provided with
spindle also exerts a downward thrust to hold the tracer
spindle against the end of the depth dial 74-‘, and since
the periphery of the tracer spindle 21.
70 this dial is internally threaded in the sleeve 59 it acts to
hold the bearing surface 54 of the sleeve against the
The tracer spindlehas formed midway of the length
supporting surface 55‘ in the plate 56.
thereof an annular rib 77 which provides a conical hear
Theoretically, the tracer spindle oscillates about a point
ing surface 78 on which the lower end of the vertical con
97 on its axis, and this point is also theoretically the
trol valve plunger '79 seats. The valve plunger 79 is
held against this seat by a spring 80 which surrounds the 75 center of curvature of the bearing surface 78 and 54, and
a shoulder 75' which engages a shoulder 76 formed on
3,084,899
5
it will also be noted that the point 97 is approximately in
the top plane of the plate 22 which actuates the valve
plungers of valves 18 and 19 depending on the direction
of de?ection of the tracer spindle about this point.
The upper end of the tracer spindle is provided with
two ?xed washers 98 and 99 and a spring 100‘ is inter
posed between them. ’Ihe lower end of the spring en
6
the operator merely steers or controls the direction of
movement.
Attention is invited to the ‘fact that when the operator
utilizes the tracer ?nger 13 to control the direction of
movement and especially three-directional movement
where the tracer ?nger must dive into a cavity there may
not be room in the cavity for the operator to conveniently
grasp and control the tracer ?nger and therefore, for con
gages a cup Washer 101 which bears against the washer
98, and the upper end of the spring engages a conical
venience, as well as safety to the operator’s hand, a sec
ended sleeve 102 which bears against the washer 99. 10 ond control has been provided on the top of this device
When the rapid traverse control knob ‘68 shown in FIG
whereby the operator may conveniently control the de?ec
URE 7 is rotated to move the sleeve 63, shown in FIG
tion of the tracer spindle as e?iciently as he could by
URE 2, upward to engage the pin 94 and thereby effect
utilizing the tracer ?nger. This control is mounted in the
axial movement of the tracer spindle, the tapered bearing
upper housing indicated generally by the reference nu
surface 103 on the end of the sleeve 102 is forced into
engagement with the shoulder 104- of the cap member
meral 12 and a tubular sleeve 121’ as shown in FIGURE
3 which has an annular shoulder 122 on the end thereof
which ?ts into a bore 123 formed in the end of the hous
105, thus compressing the spring 100 and establishing a
downwardly acting force on the tracer spindle whereby
when the control 68 is rotated in the opposite direction
the parts will be caused to return to their normal posi
tion. It will ‘be evident that the engagement of the coni
cal shaped member 102 with the shoulder 104 will nor
mally center the tracer member 21 and thereby stop the
prime movers which are controlled by the valve member
23 of valves 18 and 19‘. However, since the member 102
is resiliently mounted on the tracer member 21, with
spring 100, the tracer member 21 may be de?ected by the
operator to effect selected operation of the prime movers
controlled by valves 18‘ and 19, for movement of the
slides in the directions indicated by arrows 15 and 16 of
FIG. 10, even when the control mechanism shown in
FIG. 7 is in the position to hold the tracer member
elevated and the member 102 is engaged with the shoulder
104.
Means have been provided for establishing a ?xed
amount of bias on the tracer ‘spindle for holding the
spindle in a de?ected position without the aid of the
operator, and this is usually utilized when the tracer is
following a straight line on the pattern. It also may be
ing 106. This sleeve has an annular ring 124 ?xed in
the wall of the internal bore 125 of the sleeve which sup
20 ports a sliding sleeve 126. The sleeve 126 has a shoulder
127 formed thereon which is engaged by a spring 128
which has its other end engaging a cap 129 mounted on
the end of the member 121' and secured thereto by con
ventional means such as the screws 130‘. The member
25 126 has a central bore 131 in which is ?tted the ball-shaped
portion 132 of the auxiliary control lever 133.
The
lower end of this lever has a bearing sleeve 133’ secured
thereto for receiving the ball-shaped end 134 of a screw
135 threaded in the end of the tracer spindle 21. Suit
30 able washers 136 are secured in the end of the member
133' to hold the portion 134 in the end of the sleeve.
The upper end of the control lever 133 is provided with
‘a manual operating knob 137 and a spring 138 interposed
between a ?xed washer 139 on the member 126, and a
35 washer 140 carried by the lever 133 acts to hold the
lever 137 in a raised position and also to take out any lost
motion between the ball 134 and its bearing washer 136.
It will be seen that the lever 133 may be de?ected in any
direction by the operator grasping the control knob 137
adjusted to change the bias in any given direction through 40 and swiveled about the portion 132 as well as being
moved axially against the resistance of spring 138. It
out 360' degrees. Mounted on the top of the cap 105
is a rotatable housing 106 which has a bearing surface
will also be noted that the direction of push on the knob
137 is the same direction as the push on the tracer ?nger
107 by which it is supported for rotation on the top sur
13 for a desired direction of movement.
.
face 108‘ of the ?xed cap 105. The cap has an annular
What is claimed is:
groove 109 formed in its periphery, and the housing 106 45
1. In a tracer mechanism having a housing containing
has a clamping screw 110' threaded therein with its end
riding in the groove 109 whereby the screw 110 serves
control valve means for governing operation of indi
to keep the member 106 from lifting and- also serves to
vidual prime movers, the combination of an elongated
hold the member 106 in any particular rotatable position.
tracer member, means supporting said member in the
The housing 106 carries a biasing plunger 11 which 50 housing for axial movement and lateral'de?ective move
has a bifurcated end 112 in which is mounted a roller
ment, said valve means including a ?rst valve operatively
113 rotatable on a bearing pin 114. A spring 115 sur
connected for response to axial movement of the tracer
rounds the plunger 111 to effect inward movement of the
member, additional valve members supported in said
plunger toward the tracer spindle. The plunger 111 ex
housing in radial spaced relation to said tracer member
tends through the housing 106 in which it is guided, and 55 and axially parallel thereto, and means extending laterally
its exterior‘end is provided with a control knob 116
from said tracer member and operatively connected to
which is fastened to it by a set screw 117. A ?xed pin
118 is mounted in the housing 106 to normally bear
against the inner surface 119 of the control knob 116 and
thereby hold it in an axially retracted position against the
resistance of spring 115'. In this position on the parts the
roller 113‘ is held out of engagement with the tracer‘ spin
dlel When it is desired to apply a bias to the tracer spin
‘dle, the knob 116 is rotated 90 degrees which aligns a
said last-named valve members to effect joint or several
operation thereof in response to said lateral de?ective
movement of said tracer member.
_
‘2. In a tracer mechanism comprising a housing hav
ing control valve means therein for governing operation
of several prime movers, the combination of an elon
gated tracer member, means supporting said member in
the housing for axial movement and lateral de?ective
hole 120 in the knob 116 with the pin 118 whereby the 65 movement, a ?rst valve member supported in telescoping
spring 115 will effect axial movement of the plunger as
relation to said tracer member, additional valve mem
the pin 118 enters the hole 120. This aligns the roller
bers supported in spaced circumferential relation about
113 in a horizontal plane against the cylindrical surface
said tracer member for axial movement parallel to said
121 on the tracer plunger. It will be obvious that this
member, means operatively connecting said tracer mem
will deflect the tracer plunger in one given direction and 70 ber to said telescoping valve member for response to axial
in order to change that direction, the operator merely
movement thereof, and means responsive to lateral move
‘grasps the knob 11-6 and rotates the housing 106 about
ment of the tracer member to effect joint or several
the cap member 105. Thus, the tracer spindle is auto
operation of said circumferentially spaced valve members.
matically held in a de?ected position to produce a given
3. In a tracer mechanism comprising a housing having
feed rate depending on the setting of the rate dial 61 and
control valve means therein’ for governing operation of
assesses
7
8
several prime movers, the combination of an elongated
tracer member, means supporting said member in the
several prime movers, the combination of elongated tracer
member, means pivotally supporting the tracer member in
housing for axial movement and lateral de?ective move
ment about a point intermediate the length of said tracer
member, a ?rst valve operatively connected for response
termediate its length in the housing, motion transmitting
to axial movement of the tracer member, a pair of valve
one end of said tracer member for manual de?ection there
connections from said tracer member to said valve means,
a pattern engaging tracer ?nger detachably connected to
members supported in spaced circumferential relation
of about its pivot, a manual control lever pivotally mount
ed on the housing on the other side of said pivot from said
about said tracer member and spaced at an angle of 90
tracer ?nger and in substantially axial alignment With said
degrees, means supporting said valve members for axial
movement substantially parallel to the axis of said mem 10 tracer member, and means operatively connecting said con
trol lever to the end of said tracer member for alternative
ber to effect joint or several operation thereof in response
manual operation thereof.
to lateral de?ective movement of the tracer member in
8. In a tracer mechanism comprising a housing having
cluding a plate actuator extending laterally from said
tracer member, and bifurcated means on said valve mem
bers gripping the edge of said plate.
4. In a tracer mechanism comprising a housing having
control valve means therein for governing operation of
several prime movers, the combination of an elongated
tracer member, means supporting said member in the
housing for axial movement and lateral de?ective move
ment about a point intermediate the length of said tracer
member, a ?rst valve operatively connected for response
to axial movement of the tracer member, a pair of valve
control valve means therein for governing operation of
15 several prime movers, the combination of an elongated
tracer member, means pivotally supporting the tracer
member at a point intermediate the length thereof in said
housing for pivotal movement, a valve actuator plate ex
tending laterally from said member into operative en—
gagement with said valve means, said actuator plate hav
ing an integral sleeve surrounding said tracer member,
a rate control bushing threaded on the end of said sleeve
and having a tapered surface, a cooperating bushing hav
ing a ?xed position in the housing, said last-named bush
about said tracer member and spaced at an angle of 25 ing having an internal conical surface in spaced relation
to said tapered surface, means for adjusting said ?rst
90 degrees, means supporting said valve members for
named bushing toward and from said conical surface to
axial movement substantially parallel to the axis of said
vary the rate produced by de?ection of the tracer mem
member to effect joint or several operation thereof in
ber of said valve means, independent means for moving
response to lateral de?ective movement of the tracer
member including a plate actuator extending laterally 30 said cooperative bushing from its ?rst ?xed position in
members supported in spaced circumferential relation
valve members gripping the edge of said plate, said
said housing to a second ?xed position to allow addi
tional de?ection of said tracer member to effect rapid
bifurcated means including a solid shoulder engaging one
traverse movements, an additional control valve tele
side of said plate and a resilient shoulder engaging the
other side of said plate.
5. In a tracer mechanism comprising a housing having
control valve means therein for governing operation of
several prime movers, the combination of an elongated
tracer member, means supporting said member in the
scoping said tracer member, and additional motion trans
mitting means connecting said independent means for
simultaneously positioning said control valve in a rapid
traverse position upon actuation thereof.
from said tracer member, and bifurcated means on said
‘9. In a tracer mechanism comprising a housing having
control valve means therein for causing operation of sev
housing for axial movement and lateral de?ective move 40 eral prime movers, the combination of an elongated
tracer member, means pivotally supporting the tracer
ment about a point intermediate the length of said tracer
member in said housing about a point intermediate the
member, a ?rst valve operatively connected for response
length thereof, a laterally extending plate actuator hav
to axial movement of the tracer member, a pair of valve
ing operative connections to some of said valve means,
members supported in spaced circumferential relation
about said tracer member and spaced at an angle of 90 45 said plate actuator having a sleeve anti-frictionally re
ceived on said tracer member, an additional control valve
‘degrees, means supporting said valve members for axial
member telescopingly mounted on said tracer member,
movement substantially parallel to the axis of said mem
means supporting said last-named valve member on the
ber to effect joint or several operation thereof in response
tracer member whereby axial movement of said tracer
to lateral de?ective movement of the tracer member
including a plate actuator extending laterally from said 50 member will effect operation of the valve, said sleeve hav
ing means externally threaded thereon for adjustment to
tracer member, bifurcated means on said valve members
limit the lateral movement of said tracer member, and
gripping the edge of said plate, said bifurcated means in
additional means internally threaded in said sleeve for
cluding a solid shoulder engaging one side of said plate
limiting the axial movement of said tracer member.
and a resilient shoulder engaging the other side of said
10. In a tracer mechanism having a housing, the com
plate, and means to adjust the pressure of said resilient 55
bination of an elongated tracer member having one end
shoulder.
extending below the housing and adapted to engage a
6. In a tracer mechanism comprising a housing having
pattern, means supporting the tracer member in the hous
control valve means therein for governing operation of
ing for axial movement and lateral de?ective movement,
several prime movers, the combination of an elongated
tracer member, means supporting said tracer member at 60 valve members Within the housing for governing opera
tion of individual prime movers, one of said valve mem
a point intermediate its ends in said housing for axial
bers encircling the tracer member in spaced relation there
and pivotal movement, a ?rst 'valve operatively con
to, means operatively connecting said :one valve member
nected for response to axial movement of the tracer
to the tracer member for movement in response to axial
member, valve members arranged in circumferential re
movement thereof, means operatively connecting said
lation about said tracer member with their axes substan
other valve members vto the tracer member for move
tially parallel to the tracer member, means operatively
ment in response to lateral de?ective movement thereof,
connecting said valve members to the tracer member for
‘a manual control lever pivotally mounted on top of the
imparting axial movement to said valve members in re
housing in substantially axial alignment with said tracer
sponse to pivotal movement of said tracer member, valve
bushings mounted in said housing in telescoping relation 70 member, and means pivotally connecting one end of said
control lever to the other end :of the tracer member.
to said valve members, and means in said housing for
11. A tracer mechanism having a housing, an elon
axially adjusting said bushings relative to said valve
gated tracer member supported in the housing for axial
members.
movement and lateral de?ective movement about a pivot
7. In a tracer mechanism comprising a housing having
control Valve means therein for governing operation of 75 point, a ?rst valve member operatively connected to the
3,084,899
ll)
9
tracer member for response to axial movement thereof,
tending through the center of said socket normal to the
plane of said arm means, said stylus being freely slidable
additional valve members supported in spaced circum
ferential relation about said tracer member and operative
ly connected thereto for response to lateral de?ective
movement thereof, said additional valve members being
valve elements, one of said valve elements being aligned
in a predetermined condition when said tracer member
with and in contact with one end of the stylus, the mov
is centered, a manually operated control mechanism op
erable selectively to shift said tracer member axially a
tively connected with respective ones of said arm means
axially thereof relative to said socket, three ?xedly-sup
ported hydraulic ?ow control valves enclosing movable
able valve elements of the other two valves being opera
at points spaced 90 degrees apart in a plane at right
predetermined amount and operate said ?rst valve mem
ber, said mechanism having means to hold the tracer 10 angles to the axis of said stylus and intersecting said
socket, said valve elements being responsive to the slight
member in its shifted axial position, a conical shaped
est movement of the free end of the stylus in any direction
member resiliently mounted on the tracer member spaced
to move one or more of said movable valve elements to
from said pivot point, and means ?xed relative to the
housing and positioned to engage said conical shaped
modify ?uid ?ow therethrough.
14. A master control valve assembly for use in a three
member on shifting of the tracer member said predeter 15
dimensional follower system, said valve assembly com
mined amount to center the tracer member, whereby said
prising a stationary support having a socket, rigid arm
additional valve members normally assume their predeter
means universally supported in said socket, a stylus ex
mined condition when the tracer member is axially shifted
tending through the center of said socket normal to the
and said tracer member may be manually de?ected from
its centered position when in its shifted axial position se 20 plane of said arm means, said stylus being freely slidable
axially thereof relative to said socket, three ?xedly-sup
lectively to alter the condition of said additional valve
ported hydraulic ?ow control valves enclosing movable
members.
valve elements, one of said valve elements being aligned
12. A tracer mechanism having a housing, an elon
with and in contact with one end of the stylus, the mov
gated tracer member supported in the housing for axial
able valve elements of the other two valves being opera
movement and lateral de?ective movement about a pivot
tively connected with respective ones of said arm means
point, a ?rst valve member coaxial with the tracer mem
at points spaced 90 degrees apart in a plane at right
ber and operatively connected thereto for axial move
angles to the axis of said stylus and intersecting said
ment therewith, a pair of additional valve members sup
ported 90 degrees apart in spaced circumferential relation
socket, said valve elements being responsive to the slightest
movement of the free end of the stylus in any direction
about said tracer member for axial movement parallel
to move one or more of said movable valve elements to
to the tracer member, means extending laterally from
modify ?uid ?ow therethrough, the center of said socket
the tracer member and operatively connected to said pair
and the operative connections between said arms and the
of additional valve members to elfect joint or several
valve elements actuated thereby lie in substantially a
operation thereof in response to lateral de?ective move
ment of the tracer member, said additional valve mem 35 common plane in all operating positions of said control
bers being unoperated when the tracer member is cen
valve assembly.
tered, a vmanually operated control mechanism operable
selectively to shift the tracer member axially a predeter
mined amount and operate said ?rst valve member, said
mechanism having means to hold the tracer member in 40
References Cited in the ?le of this patent
UNITED STATES PATENTS
2,239,625
2,332,532
2,403,519
2,424,031
Gardiner _____________ __ July 9, 1916
Heer ________________ __ July 15, 19:47
the tracer member is axially shifted and said tracer mem
2,433,005
2,494,228
2,618,244
2,723,827
Turchan ____________ _._ Dec.
Cederholm __________ __ Jan.
Roehm _____________ __ Nov.
Humes _____________ __ Nov.
ber may be manually de?ected from its centered position
when in its shifted axial position selectively to operate
said additional valve members.
2,787,437
2,788,718
2,835,466
Turchan ______________ __ Apr. 2, 1957
Martellotti __________ __ Apr. 16, 1957
Rosebrook ___________ __ May 20, 1958
757,589
Great Britain ______________ __ of 1956
' its shifted axial position, a conical shaped member re
siliently mounted on the tracer member spaced from said
pivot point, and a shoulder supported in ?xed relation
to the housing at a position to engage said conical shaped
member on shifting of the tracer member said predeter 45
mined amount to center the tracer member, whereby said
additional valve members normally are unoperated when
Roehm _____________ __ Apr. 22, 1941
Roehm _____________ __ Oct. 26, 1943
23,
10,
18,
15,
1947
1950
1952
1955
13. A master control valve assembly for use in a three
dimensional follower system, said valve assembly com
prising a stationary support having a socket, rigid arm
means universally supported in said socket, a stylus ex 55
FOREIGN PATENTS
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