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Патент USA US2406012

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MECHANICAL DRIVE DFVIGE-
Filed Sept. 50, 1943
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ATTORNEY
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_MECHANICAL DRIVE DEVICE
Filed sept. 3o', 1943
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2,406,012
Patented Aug. 20, 1946
UNITED. STATES PATENT OFFICE
2,406,012
MECHANICAL DRIVE DEVICE
Harold W. Goff, Manhasset, N. Y., assignor to New
Bell
Telephone Laboratories, Incorporated,
York, N. Y., a corporation of New York
Application September 30, 1943, Serial N0. 504,389
4 Claims.
-`
e
'
l
This invention relates to mechanical drive de
vices and more particularly to mechanical drive
devices operable as a' drive connecting means be»
tween a driven apparatus and another appa
ratus to be driven.
The object of the invention is to provide a me
chanical drive device suitable for _use as a driv
ing means between a driving shaft and -a shaft
2
have a mechanical drive device operable to drive
connect the target observing apparatus to the
computer apparatus only when the target is
within 28,000 yards of the >observing station.
The present invention provides a mechanical
drive device which may be kused as a mechanical
driving means between a driven member in a
target observing apparatus and a member to be
driven in an electrical computer apparatus. The
to be driven, the second mentioned shaft being 10 device contains'certain parts which may be ad
operated during only portions of the time the
justed to change the range factor of the me
driving shaft is operated.
chanical drive device.
As shown in Figs. l, 2 and 3, in the drawings
_Features of the invention reside in a clutch
operable to drive connect two members at one
the mechanical drive device comprises two lon
point, a dog to connect the two members at an
15 gitudinally aligned rotatable shafts 5 and 0 sup
other point, a trigger to control the dog and a
ported in low friction type bearings 1 and 8, re
spectively, which are supported in a stationary
traveler carried by and movable along one of
the members and carrying means to control the
U-shaped body 9. The shaft 5 has a left-hand
male threaded portion I0 and one end of the
operation of the clutch and trigger.
Another feature resides in a spring means oper
shaft 5 is reduced in diameter as shown at II
ating to hold one of the members in a required 20 to project into a bearing I2 mounted in a recess
position while another member is being operated.
In the drawings:
Fig. 1 is a side elevational view, partly in
I3 formed in one end of the shaft 6. The bear- .
ing ß is located in a recess I4 formed in a boss
I5 of the body 0 and is retained in place by
section, of the mechanical drive device;
25 means of a flange I6 secured on the outer end of
Fig. 2 is a plan view, partly in section, of the
the boss I5 by means of screws I'I.
The shaft 5 may be rotated through the oper
mechanical drive device viewed from below Fig.
1 and with certain parts omitted to permit a
ation of any suitable means and which may be,
for instance, a crank I8 operable to turn a shaft
better view of some of the other parts;
Fig. 3 corresponds in general to Fig. 1 but shows 30 I9 and which may be part of a rotating mecha
nism in a target observing apparatus, not shown.
some of the parts moved to different positions;
The shaft I9 is shown as being rotatably sup
,
ported in stationary supports 20--20 and is
Fig. 4 is an end View, partly in section, of the
equipped with a pinion 2l in mesh with an anti
mechanical drive device taken on the lines 4-4
back lash gear system 22 comprising two gear
in Fig. 1.
35
In certain apparatus operable to determine the
wheels 23 and 24 mounted in face to face rela
location of a target relative to an observing sta
tion on the shaft 5 and gears 25 and 2.5, the lat
ter of which is secured by means of a pin 21
tion and to compute in electrical values the lo
cation of the target, it is found advantageous to
to the shaft 5. Since the present invention does
have a means for mechanically driving an elec
not reside in the anti-back lash gear system
40
trical device in a computer during only a portion
shown and other anti-back lash gear systems
of the time a target locating means is being
may be used in place thereof, it seems unneces
operated to locate the target, the target locat
sary to include in this specification a detail de
and
ing apparatus being operated during the entire
scription of the parts ofthe anti-back lash sys
tem shown in the drawings. It will be under
puter being operated only when the target is 45 stood, however, that. the anti-back lash gear
time the target is being observed and the com
within predetermined distances from the observ
system is provided to prevent back lash between
the rotation of the pinion 2| and the shaft 5.
ing station.
As an example, and not in the sense of limit
Supported on the shaft 5 and operable there
ing the invention, the apparatus for locating the 50 along by means of. the thread on the male
target may be operable to locate the target when
threaded portion I0 is a traveler 28 comprising a
ring 29, a flanged hub 30 and an L.-shaped arm
the target is 40,000 yards from and approaching
the observing station and the computer should
SI. The hub 30 is internally threaded to receive
be operated only during the time the target is
the threaded portion I0 of the shaft 5 and the
within 28,000 yards of the observing station. Un 55 flanged body 32 of the hub 30, as shown in Fig. 2,
der this condition it is found advantageous to
2,406,012
4
is clamped to the ring 29 by means of a body por
The
The disc $0 is apertured at 62 to permit thrusting
body portion 33 of the arm 3| is substantially
annular in form‘and is apertured to receive the
shank portions of the screws 311-34 which enter
therethrough of a part of the clutch device 48
and is provided with an annular boss 63 in which
tion 33 of the arm 3| and screws 341-34.
is housed a partially wound-up wind-up spring 64
tapped holes formed in the ring 29. The ñanged
a slot 65 in the boss 63 and bent over the outer
surface of the boss 63 to anchor one `end of the
spring 64 to the disc 6l). The‘ inner end of the
spring 64 is secured by means of a rivet 67 to
an annular boss 68 on the wheel 49. The pur
body 32 of the hub 3B is entered in a recess formed
in the ring 29 and is held in place by means of
the body portion 33 of the arm 3! when the
screws 34-34 are tightened.. The arm 3| extends
radially of the shaft 5 and near its outer end is
bent to provide an angularly extending end por
tion 35 which extends in parallel spaced relation
pose of the spring 64 will be subsequently ex
plained. The pins 54 and 55 are mounted in aper
with the shaft 5 and terminates-in ¿twovvs'paced
tured bars 69 and 78 respectively which are se
lugs Sli-3S only one of which is visible in the
drawings, the lug not visible being directly un
der the one shown in Figs.` 1 and 8.
cured by means of the respective screws 7| and 72
15 to the side members 52 and 53 respectively of the
rocker 5|. Since the pins 5d and 55 extend
through about the central portions of the side
The end
portion 35 on the arm 3| serves as a support for
a tripper bar 37 which is adjustably supported on
the end portion 35 of the arm 3|. The tripper
t
members 52
and 53 respectively of the rocker 5|
and through the corresponding side members 55
bar 37 comprises a fiat lbar portion 38 and a plate 20 and 57 of the yoke 58 the rocker 5| is pivotally
supported and may be rocked relative to the inner
portion 39 which extends inwardly toward the
face 73 of the disc Gü. The side member 52 of
shaft 5. The barl portion 38 is secured to the
the rocker 5| is considerably extended in one
outer surface of the end portion 35 of the arm
direction from the pivotal point of support of
3| by means of a screw 45, the threaded shank ¿il
of which is engaged in a tapped hole formed in 25 the rocker 5| to provide a finger 74 which will
engage the inner face 73 of the disc Gil to limit
the end portion 35. The shank of the screw 48
is enlarged at 42 and an elongated aperture 43
is provided in the bar portion 38 to accommodate
the portion 42 of the screw 45. rl‘he elongated
aperture 43 is longer than the diameter of the 30 one end of the rocker 5| is a wall 75 which ex
tends in spaced relation with the inner face
portion 42 of the screw 4i! so that when the
screw 49 is loosened the tripper bar 37 may be
73 of the disc 66. A helical spring 75 is located
adjusted lengthwise along the end portion 35 cf
between the inner face of the wall 75' and the
inner face 73 of the disc 68, one end of the spring
the arm 3| . Part of the bar portion 38 of the
tripper bar 3'! extends between the spaced lugs 35 76 ,being disposed in a recess 77 formed in the
35--35 to prevent pivoting of the tripper bar 37
inner face 73 of the disc 65 and the other end
on the screw 48.
Y
of the spring 7S being telescoped over an eX
tended end portion of a rivet 78 secured to the
vTo prevent the traveler 28 from turning on
wall 75 and extending toward the inner face 73 of
the shaft 5 a post 44 is provided which extends in
parallel spaced relation with the shaft 5 and 40 the disc 50. The spring 76 normally urges the
through an aperture 45 in the arm 3|. The post
rocker 5| into such position that the linger 74
engages the inner face 73 of the disc 50 as shown
44 is mounted at one end in a frameV 46 secured
by means of screws 47 to one end 'of the body 9.
in Fig. l. The wall 75 is continued over and
slightly beyond one end of the rocker 5| to provide
When the shaft 5 is rotated the traveler 28 is
moved along the shaft 5 due to the turning of . an end wall 79 extending toward the inner face
73 of the disc 66. A T-shaped bar 88 is adjustably
the male threaded portion Il! of the shaft 5 in
mounted on the end wall 7S by means of screws
the hub 38 which is held against rotation by
means of the arm 3| and the post 44. Rotation of
ill-_8| only one of which is shown, the screws
8l`-8| extending through relatively large aper
the shaft 5 in one direction causes movement of
tures formed in the cross member of the bar 80
the traveler 2S in one direction along the shaft 5.
and into screw threaded engagement with the
By reversing the rotation of the shaft 5 the trav
eler 23 may be returned along the shaft 5 to its
end wall 79. The stem 82 of the bar 88 extends
original starting position.
into the aperture 62 formed in the disc 50.
As shown in Fig. 1 the upper end 83 of the wall
The traveler 28 performs two functions, one
75 normally extends into the path of movement
of which is to operate a clutch device 48 part of
of the hub 35 of the traveler 28 and the forward
which is mounted on and rotatable with the shaft
end of the hub 3D is bevelled at 84 so that when
5. Another part of the clutch device 48 com
the traveler 28 is moved forwardly along the shaft
prising a wheel 49 which is secured to the shaft 6.
5 the upper edge 83 of the wall 75 will be, in
`When the clutch device 48 is operated in one
effect, cammed by the bevelled portion at 84 to
direction, it serves as a means to, „in effect, drive
rock the rocker 5| on its pivotal points of sup
connect the shaft 5 to the shaft 5 for rotation
pont and against the action of the helical spring
of the shaft 6 in one direction. The other func
75, the result being that the stem 82 of the T
tion of the traveler 28 is to carry the plate 35
into and out of engagement with a trigger 58 to
shaped bar BQ is projected .a considerable distance
through the aperture 62 in the disc 60 and to the
control the operation of the trigger 59, the func
position shown in Fig. 3. Since the disc 60 as
tion of which will be subsequently explained.
The clutch device 48 comprises a rocker 5l
above mentioned is secured to the shaft 5 and
having side members 52 and 53 through which pins
the rocker 5| is mounted on the yoke 58 which
54 and 55 respectively extend, the pins 54 »and
55 being also extended through apertures in the
side members 56 and 57 of a yoke type bracket 58,
the stern 82. Upon engagement of the stem 82
with the block 85 and continued rotation of the
2,406,012
S
~
6
The disc 69, therefore, is not drive connected to
shaft 5 the wheel 49 and the shaft ß to which
the wheel 49 is secured are rotated in the same
direction as the shaft 5. It will be seen, there
f-ore, that the clutch device 49 operates, in effect,
to drive connect the driven shaft 5 to the shaft
to be driven which in this case is the shaft 9.
» Supported on the inner face 95 of the wheel
49 and extending over and in spaced relation with
the outer edge of the disc 90 are two spaced pins
81 and 89 and a stud 89 as shown in Fig. 4. A
the wheel 49 and the wheel 49 and shaft 6 are held
by means of the energy storedïn the spring 54
against right-hand turning movements which
might otherwise occur through slight frictional
coupling of the parts. The'wiper contact in the
potentiometer in the electrical computer will
therefore be held against movement from its start
ing position until the shaft 9 is properly turned.
A continued right-hand turning movement ap
plied to the shaft 5 will bring the traveler 28 into
dog 99 equipped with a spring 9i is pivotally
supported on the pin 81 and arranged to engage
such position »that the bevelled portion 94 on the
a notch 92 formed in the outer edge of the disc
the rocker 5l. By engagement of these parts the
rocker 5i will be rocked on its pivotal point of
support so that the spring 16 will be compressed
99, the dog 99 being operated by meansof the
Spring 9i to engage the notch 9?.. A finger 93 is
provided on the dog 99 and arranged to be en
gaged by a finger 94 on the trigger 59 to release
hub 39 will engage the edge 83 of the wall 15 on
and the stem 92 of the bar 89 will be projected
toward the innerfface 86 of the wheel 49. The
tripper bar 31 will also be moved so
the dog 99 from engagement with the notch 92,'
39 will be almost out of engagement with the
the trigger 59 being pivotally supported on the pin
20 trigger 59. Still further rotation of the shaft 5 in
88 and having in addition to the finger 94, a finger
the same direction will cause the hub 39 to be
95 to be engaged by the plate 39 and a finger 95
come more fully in engagement with the edge
to engage the stud B9, the finger 99 and the stud
83 of the Wall 15 and will carry the tripper bar 31
89 servingincooperatio-n as a stop to limit rota
to such' position that the plate 39 will not be in
tion of the trigger 59 on the pin 89' in one direc
25 engagement with the trigger 59. The stem 82
tion.
of the bar 89 will also be carried further through
To explain the operation of the mechanical
the aperture 92 and nearer to the inner face 85
drive device above described and not in the sense
of the wheel 49. When the parts have been moved
of limiting its use thereto, it will be assumed that
to the positions last described _and are in the posi
the shaft 5 is connected to some target observing
means,. not shown, and the shaft 9 is connected 30i tion shown in Fig. 3 further right-hand turning
movements «of the shaft 5 will be transmitted to
to a rotatable wiper contact means in a potenti
the shaft 9 so that the shaft 5 will be rotated in
ometer employed in an electrical computer. Also,
a right-hand turning movement corresponding to
that theshaft 5 has been rotated to bring the
the movement of the shaft 5, the disc 69 and the
wiper contact means to a stop provided at one
wheel 99 being, in effect, drive connected at two
end of travel of the wiper contact means over a
points, one being the engagement of the stem 82
resistance winding, the spring 94 has been partly
of the bar 89 against the block 85 on the wheel
wound up to hold the wheel 49 and the shaft 9
49 and the other being- engagement of the dog 99
against such movement as would cause the wiper
contact means in the potentiometer to be moved 40 on the wheel 49 with the notch 92 in the disc 59
With the parts in the positions shown in Fig.
away from the stop and it is desired to rotate the
3 and upon rotation of the shaft 5 in a left-hand
shaft 5 to operate the target observing means over
rotational movement the following changes in
its range of movement. It will also be assumed
the operations of the parts will take place in the
that during a first part of this range of move
ment, it is necessary to rotate the shaft 5 in a 45 order mentioned.
l. The left-hand rotating movement applied to
right-hand turning movement without causing
the shaft 5 will be transmitted to the shaft 9
corresponding rotation of the shaft B and that
since the dog 99 is in engagement with the
when the target observing means has been oper
ated Aover part of its range of movement and is
notch 92.
continued in operation in the same direction and 50 2. The traveler 28 will be'moved back along
the shaft 5 by means of the threaded portion i9
into a predetermined range of movement for the
potentiometer in the electrical computer, it is nec
essary that the shaft 6 be rotated in the same di
rection as the shaft 5.
on the shaft 5.
3. The trigger 59 will be carried around by
the Wheel 49.
Under the conditions mentioned above the 55 4. The plate 39 on the tripper vbar 31 will’be
moved into the path of movement of thetrigger
<parts
59 which is being carriedaround on the wheel
initially in
99. At this stage the hub 39 will be in such po
In this case the traveler
sition relative to the rocker 5| that the edge
_the hub 39 is not in engagement with the rocker
83 of the wall 15 is >almost on the bevelled por
5l, the stem 82 is retracted into the aperture 52
in the disc 99 and entirely clear of the block 95 60 tion 84 of the hub 39.
5. Engagement of the trigger 59 with the plate'
on the wheel 49 and the plate 39 on the tripper
39 will stop further left-hand rotations of the
bar 31 is bearing against the finger 95 of the trig
wheel 49 and the shaft 6. It will also cause
ger 59 so that the trigger 59 and the dog 99 are
vin the dot-dash line positions shown in Fig. 4. 65 operation of the trigger 59 to release the dog 99
from engagement with the notch 92 in the disc 59.
The `dog199 is therefore held out of engagement
6. Continued rotation of the shaft v5 in the
with the notch 92 >against the action of the spring
same direction will cause the hub 39 of the
9|. By operating the crank 'I8 in the required
traveler 28 to be removed from engagement with
direction the shaft 5 may be rotated in a right
the wall 15 of the rocker 5| thereby allowing the
hand turning movement. During the first part of
this turning movement the energy stored in the 70 rocker 5i to be rocked back to normal position
by means of the spring 16 and so that the stem
spring v94 urges the wheel 49 against a right-hand
82 of the bar 89 is retracted into the aperture
turning movement thereof and keeps the finger
95 of the trigger 59 so pressed against the plate
92 in the disc 69.
l
'7. Further rotation of the shaft 5 in the
39 of the tripper bar 31 that the trigger 59 holds
the dog 99 out of engagement with the notch 92. 75
2,'4'06,01 2
tial'ly UnWOllnd, the Winding up `0f the Spring ‘64
Starting immediately after the Wheel@ iS StOpped
against further rotation.
3. The Spring energy deVelODedin the spring
64 operates t0 prevent the Wheel 49 and shaft E
fl‘Om I'Otaiìing in ’EL 'Tight-hand. turning mOVG-
means for drive ’connecting 'a first -rotatable‘shaft
toa second rotatable shaft in >accordance with a
predetermined program >requiring that the ñrst
shaft shall ybe rotated a predetermined'number
of turns while the second shaft `is held stationary
and the second shaft ’shall lloe rotated in accord
Wiper Contact of’the potentiometer Will remain 10 of the ñ'rst shaft, and comprising a ñrst rotatable
The
Shaft
5 mayuntil
be Continued
in 28
rotation
in 9-the
same
direction
the traveler
is re-
15 rotatable
members
being supported by means of
s »
~
turned to the position shown in Fig. 1 or until
the ring 29 engages the end of the body 9.
. on Said ape‘rtured rot
one end of Saïd rock
It Will be seen by looking at Fig. l that the
-
‘
20 member, a screw thread on said first shaft and
25 said stem will engage the block on said block
30 ond shaft to be driven in accordance with a pre
40 rocker carried by said ñrst shaft, a stem on said
d ñrst shaft
Whensaid ñrst shaft is rotated, said traveler be
ing operable to rock said rocker to move said stem
into position to engage said block during part of
50 the rotatable movement of said ñrst shaft and
the traveler 28.
.
o
determmed part of its range Without operating
5f'
.
> a screvv thread on said shaft, a traveler supported
target observing means that it will be rotated 60 a rocker Supported on sind dlsc m the path of
when the target The
observing
over a
wipermeans
arm is
of swept
the poten-
certain range.
tiometer in the electrical computer may be so
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tailïäglhsëïportâî
.
.*
ap u‘ëne
‘fa
t .
.
.
Connected to the shaft 6 that the Wiper arm will V65 support said second shaft, a wheel secured to sald
70 Wheel from ybeing rotated relative to said dise, a
shaft 5 with respect to the shaft 6.
»
Y
75 into position to engage said block to transmit ro
2,406,012
said dog from said notched portion, atraveler
tations of the iirst mentioned shaft to said sec
ond shaft, and said device being operable to per
mit the first mentioned shaft to be rotated a pre
determined number of turns without causing said
second shaft to 'be rotated and then upon con
tinued rotation of the ñrst mentioned shaft to,
in eiîect, couple the first -mentioned shaft to said
supported on said driving shaft and in screw
threaded engagement with said driving shaft, a
post supported on said support and operating to
prevent rotation of said traveler, said traveler be
ing operable along said driving shaft to engage
and îrock said rocker to project said stem into the
space between said members to a position to en
gage said block when said members are relatively
4. A mechanical drive device comprising la sup
‘otated, a tripper bar supported on said traveler
port, an externally threaded driving shaft sup 10 and carried by means of said traveler into and
ported in said support, means to rotate said shaft,
out of engagement with said trigger, said device
second shaft.
a second rotatable shaft supported in alignment
with said driving shaft, means to support said
second shaft, an apertured rotatable member
secured to said driving shaft, a second rotatable 15
member secured to said second shaft, a block on
said second rotatable member, said rotatable
members being supported in parallel spaced rela
tion, a partially wound up wind-up spring located
being operable, when said driving shaft is rotated
in one direction, to allow said driving shaft to
rotate without rotating said second shaft and
then later operating to drive connect said driving
shaft to said second shaft by engagement of said
stem with said block, said tripper operating to
permit said dog to engage said notched portion
to prevent relative rotation of said members, and
between said rotatable members, one end of said 20 said device being operable when a reverse rota
spring being secured to said apertured rotatable
tion is applied to said driving shaft to at first
member and the other end being secured to said
have both shafts rotate, then later trip said trig
second rotatable member, a rocker supported on
ger by means of said tripper bar to release said
said apertured rotatable member, a stem on said
dog from said notched portion and stop said sec
rocker extending through the aperture in said 25 ond shaft, then move said traveler away from
apertured rotatable member and operable by
said rocker to allow said stem to be withdrawn
means of said rocker to project into the space
from the space between said members, said aper
between said rotatable members, a return spring
tured member being then rotated by further rota
in said rocker, a notched portion on said aper
tions of said driving shaft to further wind-up said
30
tured rotatable member, _a dog and a trigger piv
wind-up spring to hold said second rotatable
otally supported on said second rotatable mem
member and said second shaft against movement
ber and extending over the notched portion of
from their stopped position.
said apertured rotatable member, said dog being
HAROLD W. GOFF.
operable to engage in the notch on said notched
portion and said trigger being operable to release 35
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