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Патент USA US2405629

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Aug. 13, 1946.
M, N, YARDEVNY
2,405,629
REMOTE CONTROL APPARATUS WITH UNI-DIRECTIONAL-|STOPPING
Filed Feb. 9, ,1945
59
21
Mex/£1 MYA RDE/Vy
INVENTOR
5;; Z’
ATTORN EY
2,405,629 '
Patented Aug.'l3, 1946
UNITED STATES PATENT OFFICE
2,405,629
REMOTE CONTROL APPARATUS wrm
UnmmEc'noNAL STOPPING
'
Michel N. Yardeny, New York, N. Y.
Application February 9, 1945, Serial No. 576,920
7 Claims. v (01. 172-239)
1
2
This invention relates to control apparatus for
' pens to be the direction illustrated in the draw
be, and usually is, reversible so that the object
.from' a predetermined direction, to wit, clock
ing and described in the specification-then there
energizing a motor, which may be at a remote
will be present'a device, adapted whether oper
point, to move an object or load to a predeter
mined position. The motor in such systems may . ' ating clockwise or counter, to stop when coming
‘or load may be moved in either direction.
In virtually all mechanical or .mechanical
electrical devices, including remote control ap
wise, as assumed.
.
For the attainment of this object and such
other objects as may appear or be pointed out
herein, I have shown an embodiment of my in
paratus to which this invention pertains, there
vention in the accompanying drawing, wherein:
is an inherent over-run beyond the ideal or nor 10
Fig. 1 is a diagrammatic illustration of the
mal stopping position due to mechanical and
improved
remote control apparatus implemented
electrical inertia, back-lash in gears and other
with the uni-directional stopping provision of
parts, wear in bearings and other engaging sur
the invention;
faces. etc. In devices which are reversible and
Fig.' 2 is a detail, partly in section, of the im
operate in either direction, there is ordinarily a 15
proved stopping provision;
‘
“right over-run” when the device is stopped
Figs. 3A to 3D illustrate sequential operation
while operating in a rightward direction and a
of the device;
"left over-run” when stopped while operating in
Fig. 4 illustrates a slight modi?cation in oper
a leftward direction. Ordinarily, all other things
of the improved stopping device; and
being the same the right and left over-runs are 20 ation
Fig. 5 is a diagrammatic illustration of a se
equal, so that, calling each of the two over-runs,
a “directional over-run," there are two direc
tional over-runs. That is to say, in a reversible
lector disc showing the various stopping and re- '
versal positions of the contact arm.
The remote control apparatus shown in Fig, 1
device which is sometimes operated in a right
has two selectors I, II, although so far as the
25
ward direction,_ and sometimes in a leftward di
invention is concerned, it may have one or more
rection, and is stopped in either direction, there
than two. Each of the selectors I, (II) has an
will be present an extent of over-run equal to
insulated disc 18 (38) and (rotatively mounted
two directional over-runs.
on a shaft 5!) provided with a pair of segments
The prime object of this invention is to in
I6, I‘! (38, 31) the adjacent ends of which are
crease the accuracy of control apparatus, i. e.,
separated
by gaps i9 (39). Each of the selectors
to decrease the deviation between the ideal or
I
(II)
has
a contact arm H (3|) secured to ro
theoretical stopping position which would always
tate with the said shaft 5| and provided at its
be attained by a theoretical apparatus, load and
other parts without weight, inertia, friction, etc.,
on one hand and the actual stopping position
of the physical apparatus and load, subject to
the directional over-runs pointed out above on
the other hand. These and kindred objects are
attained by providing means in control appara
‘tus, which is reversible for moving the load in
either direction, for reducing the extent of over
run by eliminating either the aforementioned
"right over-run” or the “left over-run”; by so
eliminating one or the other of the two "direc
tional over-runs” the accuracy of the apparatus
is increased twofold and by the same token the
error is reduced in half. This is achieved, as
will be fully described in the speci?cation, by
causing the device whether operating in a right
ward (or clockwise) or a leftward (or counter
clockwise) dlrection, to always stop in a prede
termined direction, which may be either 'clock-‘
wise or counter-clockwise as may be determined
beforehand. Assuming that the predetermined
direction of stopping is clockwise-which hap
distal end with a. contact IIX (3iX) slidably en
gageable with the said segments IS, IT (36, 31).
The segment is of selector I is connected in a
manner to permit rotation of the discs (con
veniently shown by a ?exible lead IGX) to lead
l4 having a switch 12, which connects to the
outside of a relay 24; the other segment i‘! of
selector I is connected by ?exible cable "X, and
lead I5 having a switch l3, to the outside ter
minal of a relay 25. In similar manner, the out
side terminals of the two said relays 24, 25 are
connected to the segments, 36, 31, of the selector
II, through leads, respectively, 34, 35 having re
spective switches 32, 33. The inner terminals of
the relays 24, 25 are connected by short leads
24X, 25X to a common wire 23 leading through
50 switch 22 to one terminal 2! of a source of supply.
The aforesaid switches l2, [.3 are connected for
unison operation by a gang switch A1 while the
corresponding switches 32, 33 of selector III has
a gang switch A’.
Either one ofthe selectors
I, II is placed into operation by closing their re
3
2,405,020
spective gang switch A‘, A2 and at the same
time opening the switches of the selector not in
operation. Assuming that selector I is to be
placed in operation to move the load. driven
from shaft 5| as shown ln'the drawing, in a
clockwise direction, insulated disc I8 is pre-set
by rotational adjustment in clockwise direction
4
back to current source. When motor speed ex
ceeds a predetermined amount, the spring arm
55 under the in?uence of increasing centrifugal
force, will move outwardly to cause its contact 55)‘,
to break engagement with ?xed contact 54, thus
breaking the motor circuit and causing the motor
to stop or rather to be slowed down.
For reasons having to do with the uni-direc
to displace gap I9 from the normal or zero posi
tion (which is taken to be at 12:00 o'clock as
tional stopping provisions of the invention, which
shown in selector II) an extent which will move 10. will soon be described, a by-pass is provided
the load to the desired position and switches
around the speed governor which may be traced
I2, I 3 are closed.
from the aforementioned short lead 55X, through
This pre-setting of disc ‘I 8, will cause contact
lead 13, to the proximal end of a lever switch arm
arm II to be in engagement with segment I5, as
12 pivotally mounted at its upper end and pro
, shown in Fig. 1. When it is desired to move the
vided with a contact 12X at its distal end. Switch .
load to the predetermined position corresponding
arm 12 is maintained during the normal running
to the setting of selector I, the switchs 58, 22 are
of motor 5|l-by means which will soon be de
closed to complete a circuit which may be traced
scribed-in engagement with a contact 82X pro
from terminal 59 through wire 51, lead 51)‘, to
vided at the distal end of a second lever switch
contact arm ||, contact “X, and engaged seg 20 arm 82, connected by lead 83 to the supply wire
' ment l8, through ?exible lead 86X, lead l4, closed
51. Hence in the normal running of the motor,
switch l2, to relay 24, from whence through short
the two switch arms 12, 82 making contact with
lead 24X, to wire 23, leading back to the other
one another as mentioned, the rotary speed
terminal 2|. Energization of relay 24, causes this
governor will baby-passed and ineffective to in
relay to attract its armature 44, to complete a
?uence motor speed. The rotary governor comes
circuit to the motor winding 46, which may be
into operation when the motor is to be stopped as
traced from the aforesaid supply wire 28, through
the load approaches its predetermined end posi
lead 28, to relay contact 28, attracted armature
tion, in the following manner:
44, common lead 40, unattracted armature 45, of
There is provided on motor shaft 5|, as may be
the other relay 25, (which is deenergized), to re 30 seen from Fig. 1 and also from Fig. 2, two discs
lay contact 43, and through lead 41, to motor
88 and 10, both of which are free to rotate on a
winding 48, from whence the circuit may be
reduced portion 5| X of motor shaft 5|. Between
traced through short lead 50', through the arma
the discs 10, 80 is provided a washer 2 which is
ture of motor 50, other short lead 50X, leading to
feathered to the reduced shaft portion 5|>< for a
a rotary speed governor which will be subse
slight extent of axial movement. A spring coil 3,
quently more fully described; at this time it might
one end of which bears against the left shoulder
be stated that the circuit be traced as completed
(as viewed in Fig. 2) formed by the aforesaid re
through the said supply wire 51, leading back to
duced shaft portion 5|><, the other end of spring
the other terminal 59. Energization of ?eld wind
- 3 abutting against the assembly of disc 80, washer
ing 48, causes rotation of load motor 55 in its 40 2, and disc 10, thelatter disc bearing against a
clockwise direction, which rotation continues un
collar 4 formed on shaft 5|. The disc 80 has a
til contact arm H. which is secured to rotate with
radially extended ?nger BI, and the disc 10 has
motor shaft 5| in the same clockwise direction,
a similar ?nger designated 1|. The discs 15, 80
reaches gap IS, in the aforesaid precept position of
are positioned on shaft 5| in a manner to inter
insulated disc l8, whereas the gap I9 is bridged, (5 pose ?nger 8| of disc 80 between the distal end
so that contact ||X engages both segments l5, l1,
of lever switch arm 82 and a stationary stop I
to energize both relays 24, 25, with the result that
secured to machine frame, as is clearly shown in
their respective armatures 44, 45 are attracted
Fig. 1 and also seen in any of the Figs. 3A to 3D;
and open the circuit through the ?eld windings,
and with the ?nger 8| of the other disc 80 posi
causing the motor to stop. ‘
tioned to permit the disc to swing from a position
The aforementioned rotary governor, is pro
in which its ?nger 1| abuts the distal end of the
vided for the purpose of holding down the motor
other lever switch arm 12 (which position is
speed to a predetermined amount for the purpose
shown in Fig. l and also Fig. 3A), to a second
which will become apparent from the following
position which is, as shown in the drawing, about
description, and comprises an insulated disc 52,
60° less than a full circle from the ?rst position
which is mounted to rotate with motor shaft 5|,
and in which second position the ?nger 1| of disc
and comprises a swing arm 55. The arm is
10 abuts the other side of the aforesaid stationary
pivotally mounted on the disc at one end 55a, and
stop l, as shown in Fig. 30. Thus, the rotation
is weighed at its distal end, and is also provided
of disc 80 is restrained to a small angle of turning
with a contact 55x at its distal end, engageable 60 by reason of the interposition of its ?nger 8| be
with a contact 54, on the disc 52; the pivoted end
tween stop I and the lever switch arm 82, whereas
of spring arm 55 is connected to a collector ring
the disc 10 has a much larger angle of rotation
55, engaged by a brush 56X, which is on the supply
somewhat less than a full circle, from the posi
wire 51. The ?xed contact 54 is connected to a
tion shown in Fig. 1, with its ?nger 1| abutting
second collector ring 53, which is engaged by a 65 lever switch arm 12, counter-clockwise, to a
brush 53X, which is on the short lead 55X, leading
second position in which the ?nger abuts with the
to the motor armature circuit. Spring arm 55
stop I, as shown in Fig. 3C.
>
is preferably made of spring material which nor
By reason of the mounting of the discs 15, 80 on
mally presses the arm to engage its contact 55X
the shaft 5|, as described above with particular
to engagement with the stationary contact 54, to 70 reference to Fig. 2, both discs are frictionally
complete a circuit which may be traced from the
driven by motor shaft 5|, in the particular direc
short lead 58><, coming from the motor armature
tion of motor rotation. It has been noted in the
to brush 53X, collector ring 53, ?xed contact 54,
statement of invention, that the provisions for
spring arm 55 and to ‘the collector ring 56, from
uni-directional stopping has been designed’ to
whence through the brush 56X to Supply wire 51, 75 provide for stopping the motor, irrespective of
2,405,629
clockwise) or a leftward (or counter-clockwise)
direction-at all times in a clockwise direction.
6
tar-clockwise, the contacts 82X, 12* remain in en
gagement (except for a negligible period of time
whether the motor is operating in a rightward (or
' before the parts can be moved from their position
shown in Fig. 3A to positions shown in Fig. 33),
Fig. 3A represents the position or the parts, more
particularly the discs 10, 80 and the lever switch
so that the speed governor continues to be by
passed. Hence in instances when the motor ro
tates (normally, as distinguished from rotation
after a reversal. as will be seen) in a clockwise di
arms 12, 82, when the motor rotates in a clock
wise direction. By reason of the frictional en
gagement between the discs 10, 80, the keyed
washer 2, and shaft collar 4, the discs ‘I0, 80 will
rection, and as the load approaches its end posi
tion, contact arm II in approaching gap I9 over
likewise be both turned in a clockwise direction to
bring ?nger ill of disc 80 in abutment with stop
runs to cause a reversal of rotation from clock
I, and to bring ?nger ‘II of disc 10, into abutment
with distal end of lever switch arm 12, moving its
distal contact "X into engagement with the dis
tal contact 82X 01 the other lever switch arm 82,
causing both lever arms 12, 82 to be turned in a
there is no reduction in speed.
wise to counter-clockwise, the speed governor
will continue to be by-passed with the result that
. '
It should be noted that Fig. 3B shows the con
dition of the parts soon after a reversal irom
clockwise to counter-clockwise, and with the con- _
clockwise direction, which turning is restrained
by the stop 82', abutted by the lever switch arm
tacts 12X, 82X by-passing the speed governor as
alreadydescribed. Disc 10 continues to turn with
82. In this condition of the parts as shown in
Fig. 3A, it will be noted that the aforesaid abut 20 the counter-clockwise rotation of shaft 5| until
its ?nger ‘II, after traversing almost a complete
ment of ?nger II with the two lever switch arms
revolution, abuts the stop I as shown in Fig. 3C,
12, 82, causes the by-pass circuit previously traced
the contacts 12X, 82X remaining engaged to by
to be completed and thus to e?ectively by-pass
pass the governor, as shown.
‘
the rotary speed governor. Summarizing, during
The extent of over-run or contact arm II be
the normal rotation of the motor in clockwise di-_ 25
yond gap I9 and onto anterior segment I‘! will not
rectlon, the rotary speed governor’ will be by
always be the same but will vary (depending upon
passed so as not to affect the motor speed. We
motor speed principally, but also in?uenced by
will assume that the load is now approaching the
the condition of the parts as a?ected by wear and
desired end position, making it necessary to stop
the rotation of the motor, and also that selector 30 other factors), sometimes being close to the gap
and at other times being further removed there
I is in operation. From Fig. 1 it will be noted
from. But for purposes of description, it may be
that during the said clockwise rotation of the
assumed that the contact arm-when rotating,
motor, contact arm I I is in engagement with seg
say, clockwise as shown by arc-arrow a in Fig. 5-—
ment I6 of the insulated disc i8, (which has been
preset, as already described, to displace 'gap I9 35 will over-run a certain average extent onto the
anterior segment, which for convenience will be
the proper angular extent away from the zero
referred to as the “over-run position,” and which
position, depending upon the particular load
is shown in Fig. 5 by the radial line A.
movement desired). As previously described, the
As the result or said reversal, the contact arm
engagement of contact arm II with segment I6
causes the clockwise rotation of the motor by rea
40 II over-run onto segment I1, will now be turned
by motor shaft 5| counter-clockwise (as shown
by the arc-arrow b in Fig. 5), now approaching
gap I9 from the opposite direction, 1. e., from seg
ment I1 rather than from segment I6, as before.
At the start of this counter-clockwise turning,
from the said “over-run position” on segment H,
the discs 10, 80 and lever switch arms 12, 82 will
both segments I6, I‘! to energize both relays .24,
be in the positions shown in Fig. 30, still causing
25 and disrupt the current supply to the motor, in
the speed governor to be by-passed. When con
the manner already described, and stop motor ro
tact arm II reaches and bridges gap I9, both re
50
tation.
lays 23, 25 will again be energized to disrupt cur
However, due principally to inertia and also for
rent supply to the motor, as happened in the ?rst
the reasons mentioned in the statement or inven
bridging
of the gap when contact arm II ap
tion, contact arm II will ordinarily not stop pre
proached the gap from segment IS. The arm will
cisely at gap I9, but will over-run this position to
an extent causing its contact I IX to leave engage 55 again over-run from the posterior segment I‘!
onto the anterior segment I6, for the same reason
ment with the posterior segment I5 and to make
son of the energization of relay 24 and field wind
ing 48. As the load is approaching the desired
end position, contact arm II will approach the
gap I9. Ideally, motor rotation should cease im
mediately when contact arm I I reaches gap I9,
to bring its contact IIX into engagement with
and, on the average, to the same extent as the
first over-run; this over-run position is shown in
Fig. 5 by the radial line B. It should be stressed
energization of relay 25. This causes the motor
that
the extent of the ?rst A and second B over
to again rotate but in the reverse or counter 60 run is, on the average, the same inasmuch as
clockwise direction. This reversal in direction,
there has (as yet) been no speed reduction, the
shown in Fig. 3B, results in the turning of both
speed governor continuing to be by-passed (which
discs ‘I0, 80 counter-clockwise, with ?nger 8I of
can be seen by comparing Fig. 36 with Fig, 3A).
disc 80 moving away from stop I and with finger
As the result of the second reversal (from
‘II of disc 10 moving away from lever switch arm 66 counter-clockwise to clockwise), contact arm II,
‘I2. However, almost immediately-more spe
over-run onto segment IE, will now be turned by
ci?cally, after moving a small portion 01 a com
motor shaft clockwise, now approaching gap I9
engagement solely with the anterior segment I1,
thus causing the deenergization of relay 24 and,
plete revolution, as shown in the drawing—?nger
8| 0! disc 80 abuts the distal end of lever switch
from the segment I6 as shown by the arc-arrow
I c in Fig. 5. We have already considered a situa
arm 82 to move its and also the other arm 12, 70
their contacts 82X, 12* being engaged, in a clock
wise direction until lever switch arm ‘I2 abuts its
stop ‘I2’, to bring the parts in the position shown
tion, at the beginning of the cycle now being de
scribed, in which motor rotation was clockwise
and contact arm II approached gap I9 from seg
ment I6, and we had seen that the position of the
in Fig. 33. From Fig. 33 it will be seen that, upon
the reversal in direction irom clockwise to coun- 76 parts prior to the ?rst reversal (from clockwise
asoaoce
to counter-clockwise) was as shown in Fig. 3A
to abutment with switch arm ‘I2 (as shown in
with ?nger 8i of disc 88 abutting stop 5 and with
?nger 1| of disc ‘I8 pushing the lever switch arm
‘I2 into contact with lever arm 82 against its stop
Fig. 3A). Hence during this time, the speed gov
82'. We have also seen that the parts are in the
position shown in Fig. 30 prior to the second re
versal (from counter-clockwise to clockwise) , with
?nger SI of disc 80 now pushing the lever switch
arm 82 into contact with lever arm ‘I2 against its
stop ‘l2’ and with finger ‘II of disc 10 now abut
ting the stop i. This diiference between the posi
ernor is not by-passed but is effective to reduce
the motor speed. It will be noted that, in the
situation considered in Fig. 5, contact arm II
makes three traverses, namely, ?rst, a clockwise
traverse, designated a, following normal motor
rotation in clockwise direction; second, a counter
clockwise traverse, designated b, following ?rst
10 reversal; third, 9. ?nal traverse in a clockwise
direction designated 0 following second reversal.
tion of the parts-especially the dl?erence in
The speed of the second traverse b is very con
position of disc ‘III-prior to the ?rst reversal
siderably reduced from that obtaining during the
(clockwise to counter-clockwise) as shown in Fig.
?rst traverse a by reason of the fact that upon
3A, and their positions prior to the second .re
a the motor reversal-which means that the motor
versal (from counter-clockwise back to clockwise)
comes to a standstill from which it accelerates
is important since upon that difference hinges the
the rotational speed to which it accelerates dur
gist of the invention. It will be seen from Fig.
ing the said second traverse speed is relatively
3A that it is ?nger ‘II of disc 18 which‘ maintains
, low by reason of the briefness of the time period
the lever switch arms ‘I2, 82 engaged in contact 20 of said traverse after reversal. The speed of
(while ?nger 8| of disc 88 abuts stop I); it will
motor rotation is even lower during the third
be seen from Fig. 30 that it is ?nger 8| of the
traverse c by reason of this circumstance and also
other disc 80 which now maintains the lever
by reason of the fact that the speed governor
switch arms engaged in contact (while ?nger ‘II
comes into operation at the said third traverse c,
of disc ‘III now abuts stop I). And it will be seen
as already described. Hence, contact arm will
from both Figs. 3A and 30 that the ?nger M and
not over-run onto segment II, but will stop at
disc 80 has a limited small angular extent of
the gap I8, which position is indicated in Fig. 5
movement between stop I and the lever switch
by the radial line C.
arm 82 (which limited angle is designated S in
It is interesting to note from Fig. 5 that the
Fig. 33), while the ?nger ‘II and disc 18 has a
aforedescribed over-runs of the contact arms, as
30
considerable angular extent of movement between
the device is brought to a stop in a clockwise
stop I and lever switch arm ‘I2 (which consider
able large angle is designated Lin Fig. 3A).
direction (short arrow-arc c)—which direction
is chosen as the uni-directional stopping direc
tion after normal rotation in a clockwise direc
Hence at the time of the ?rst reversal which
occurs when the contact arm is engaged with seg
tion (long arrow-arc a)-traces a Z-like move
ment I1 and causes a reversal to a counter-clock 35 ment, i. e., following the strokes and directions
wise rotation, ?nger 8| has only to traverse a
small angle S before it reaches the lever switch
arms to continue their engagement in contact
in customarily writing this letter; the ?rst top
by the ?nger BI, see Fig. 30). During virtually
truly accurately represented by inter-segmental
stroke from left to right is the arrow-arc a, the
second diagonal stroke from right to left is the
(which prior to the reversal were maintained in
arrow-arc b, and the ?nal bottom stroke from
contact by the ?nger ‘II). On the other hand, 40 left to right is the arrow-arc c.
- at the time of the second reversal, which occurs
-_A less complicated movement is traced by the
when the contact arm is engaged with segment
contact arm in over-running following normal
I6 and causes a reversal to clockwise rotation, - rotation in a. counter-clockwise direction, which
?nger ‘Ii must traverse the considerably larger
comprises only two of the three arrow-arcs a,
angle L before it reaches the lever switch arms
b, 0, making up the so-called Z-effect when stop
to continue their contact engagement (which
ping after normal clockwise rotation; these two
prior to the reversal were maintained in contact
arrow-arcs are b (which ?rst component is not
all of the time required for disc 10 to traverse the
arrow-arc b, but rather by the longer arrow-arc
large angle L, the lever switch arms 12, 82 will ‘ b’, signifying that the reversal--at B—-occurs
be in open condition, as shown in Fig. 3D.
after rotating normally in the counter-clockwise
It should be mentioned at this point that the
direction shown), and the ?nal uni-directional
lever switch arms ‘I2, 82 are either pivotally
stopping arrow-arc c. Uni-directional stopping
mounted at one end and spring-pressed apart and
after normal counter-clockwise rotation, there
into engagement with their respective stops ‘i2’,
fore, involves only a single reversal, namely, at
82' or are rigidly mounted at one end but formed
B. The discs ‘I0, 88 are in the positions shown in
of ?exible material and urged apart by the
Fig. 3C just prior to this reversal; upon reversal
springy nature of the lever material. In either _ from counter-clockwise (Fig. 30) to clockwise
case, if neither one of the ?ngers ‘II, ‘I2 abut the
(Fig. ‘3D) , disc ‘I0 traverses the large angle L, see
lever switch, arms-which is the circumstance in
Fig. 3A, the governor by-pass circuit remaining
Fig. 3D—-the arms are separated and not in con
open at this time—as shown in Fig. 3D-—-to reduce
tact engagement (see Fig. 3D).
the speed, as already described in connection with
As motor rotation reverses, at the said second
the Z-e?ect when stopping after normal clockwise
reversal, from counter-clockwise (see Fig. 30) to
rotation.
clockwise (see Fig. 3D), ?nger 8I moves clockwise
The stop 82' of switch arm 82 prevents ?nger
away from abutment with switch arm 82 toward
1|
when its disc ‘I8 is turned clockwise, as shown
stop I and the switch arms are urged by the
in Fig. 3A, from pushing switch arms ‘I2 and 82
afore-described spring provision to disengage (as
in abutment with the other ?nger 8|, which is
shown in Fig. 3D) and open the governor by-pass
thus
free to leave abutment with switch arm 82
circuit. The switch arms ‘I2, 82 remain in their 70
disengaged position against their respective stops
‘I2’, 82' (as shown in Fig. 3D), during the time
that disc 10 takes to traverse the large angle L,
Fig. 3A, from its abutment with stop I, as shown
and traverse the small angle S, Fig. 3B, alone.
The consequence of this is that for a very short
period the contacts 'I2><, 82X will be open when
there is a. reversal from clockwise (Fig. 3A) to
in Fig. 30, around almost a complete revolution, 75 counter-clockwise (Fig. 33), since ?nger ‘II
2,405,629
a
leaves abutment'with its switch arm 12 which will
immediately disengage from switch arm 82 by [its ‘
spring action, Fig. 3A, before the other ?nger 8i, '
leaving abutment with stop I, reaches its switch
arm 82, to bring the contacts 12X, 82X into en
10
engaged posterior conducting element onto the
anterior conducting element to cause a reversal
in rotation from clockwise to counter-clockwise,
whereat the ?rst said ?nger turns counter-clock
wise irom the said adjacent side of the ?nger stop
to abut the contact end or the ?rst said switch
arm to engage its contact with the contact or
If this short interval or reduced speed is not
the companion switch arm and to abut the latter
desired, the stop 82' of switch arm 82 may be
arm against its said stop, whereby the speed gov
omitted, as has been done in Fig. 4, in which case
?nger ‘H pushes the switch arm 12, 82 against 10 ernor is by-passed upon the said reversal, the
second said ?nger abutting the ulterior side of the
the other ?nger 8i which abuts stop I, as shown.
?nger-stop; the said contact arm over-running
Hence, upon a reversal from- the clockwise rota
from the engaged posterior conducting element
tion shown in Fig. 4, the engagement between
onto the anterior conducting element to cause a
contacts 82x, ‘I2x is never broken and the normal
second reversal in rotation from counter-clock
by-passing oi the speed governor is not inter
Basement again. .
feud with.
I claim:
__
‘
1. In control apparatus for moving a load in
a desired direction to a desired end position, in
combination, av pair oi’ relatively movable mem
bers, one of the members having a pair of elec
wise to_ clockwise, whereat the ?rst said ?nger
turns clockwise from said abutment with the
?rst said switch arm to‘ release the arm to the
said spring means to disengage the switch arm
contacts, whereat the governor becomes eilfective
to reduce motor speed following the said second
reversal, the second said ?nger turning from said
abutment with the ulterior side of the ?nger stop
clockwise through the said relatively large angle
gageable with the said conducting elements, a ,
motor operatively connected through a shaft to 25 before abutting the second said switch arm to
re-engage the switch contacts, whereby the said
drive the load, a pair 01' coils associated there
contact arm turning at the said reduced speed
with, individual ones thereoi' being connected to
stops at the gap without over-running.
respective ones of the said pair of conducting ele
2. In control apparatus for moving a load in a
ments, one of the said pair of members being
selectively adjusted to cause displacement be 30 desired direction to a desired end position, in com
bination, a pair of relatively movable members,
, tween said gap and contact element on engage
trical conducting elements separated by a gap,
the other member having a contact element en
one of the members having a pair of electrical
conducting elements separated by a gap, the other
member having a contact element engageable
motor in a direction to cause an operational
movement of the load in a predetermined desired 35 with the said conducting elements, a motor opera
tively connected through a shaft to drive the load,
direction, say, clockwise, the other’ of the said
a pair of coils associated therewith, individual
pair of members being turned by the motor in a
ones thereof being connected to respective ones of
direction to cause alignment of contact element
the said pair of conducting elements, one of the
and gap to stop the motor, and means operative
irrespective of the direction of said operational 40 said pair of members being ‘selectively adjusted to
cause displacement between said gap and contact
load movement to cause said motor stopping to
element and engagement thereof with one or the
occur after a short terminal movement of the
ment thereof with one or the other of, the said
pair 01' conducting elements to rotate the said
said load shaft in a predetermined direction, say,
clockwise, comprising a speed governor adapted
to hold the speed oi! motor rotation to a reduced
limit, a circuit including a switch for by-passing
the speed governor in the closed condition of the
switch, said switch comprising a pair of arms
each mounted at one end and spring urged apart,
other of the said pair of conducting elements to
rotate the said motor in a direction to cause an
operational movement of the load in a predeter
mined desired direction, say, clockwise, the other
of the said pair of members being turned by the
motor in a direction to cause alignment of con
tact element and gap to stop the motor, means
each arm being provided with a contact at its 50 operative irrespective of the direction of said op
erational load movement to cause said motor stop
distal end, each arm having a stop limiting said
ping to occur after a short terminal movement of
parting movement, a pair of discs rotatively
the said load shaft in a predetermined direction,
mounted on the said load shaft and frictionally
say, clockwise, comprising a speed governor
constrained to partake of the rotation thereof,
a ?nger stop disposed close to, but spaced from, 55 adapted to hold the speed of motor rotation to a
reduced limit, a circuit including a switch for by
the contact end of a ?rst designated one of the
passing the speed governor in the closed condition
said pair of switch arms, each of the said discs
of the switch, said switch comprising a pair of
having a radial ?nger, the ?nger of a ?rst desig
arms each mounted at one end and provided with
nated disc being interposed between the adjacent
side of said ?nger stop and the contact end of 60 a contact at its distal end, spring means urging
the said pair of arms outwardly to open the
said ?rst switch arm whereby the said ?rst disc‘
switch, a pair of discs rotatively mounted 'on the
is limited to a relatively small angle of turning,
said load shaft and frictionally constrained to
the ?nger of the other disc being turnable with
' partake of the rotation thereof, a stop disposed
its disc from the ulterior side of the said ?'nger
stop through a relatively large angle to the‘ sec 65 close to, but spaced from, the contact end of a
‘?rst designated one of the said pair of switch
ond one 01' the said pair of switch arms, the
arms, a second stop limiting movement of the
?rst said ?nger during the said operational clock
second switch arm, each of the said discs having a
wise rotation abutting the said ?nger stop and
radial ?nger, the ?nger of a ?rst designated disc
the second said ?nger abutting the contact end
01' the second switch arm to engage its contact 70 being interposed between the adjacent side of said
stop and the contact end of said ?rst switch arm
with the contact of the companion switch arm
whereby the said ?rst disc is limited to a rela
and to abut the latter arm against its said stop,
tively small angle of turning, the ?nger of the
whereby the speed governor is by-passed during \
other disc being turnable with its disc from the
operational rotation in the said clockwise direc
tion; the said contact arm overrunning from the 75 ulterior side or the said stop through a’ relatively
a
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large angle to the second one o! the saidpair of
switch arms, the ?rst said ?nger during the said
operational clockwise rotation abutting the said
?nger stop and the second said ?nger abutting
the contact end of the second switch arm to en
gage its contact with the contact of the com
panion switch arm and to abut the latter arm
the ulterior side of the said ?nger stop through
a relatively large angle to the said switch, the ?rst
said ?nger during the said operational rotation
abutting the said stop and the second said ?nger
abutting the said switch to by-pass the speed gov
ernor during operational rotation; the said con
tact arm over-running from the engaged posterior
conducting element onto the anterior conducting
against the ?rst said ?nger, whereby the speed
governor is by-passed during operational rota
element to cause a reversal in rotation, whereat
tion in the said clockwise direction; the said con 10 the ?rst said ?nger turns from the said adjacent
tact arm over-running from the engaged posterior
side of the ?nger stop to abut the said switch to
conducting element onto the anterior conducting
continue said by-passing oi’ the speed governor,
element to cause a reversal in rotation from clock
the second said ?nger abutting the ulterior side
of the ?nger stop; the said contact arm over
wise to counter-clockwise, whereat the ?rst said
?nger turns counter-clockwise from said adjacent 15 running from the engaged posterior conducting
side of the ?nger stop to abut the contact end of
element onto the anterior conducting element to
the ?rst said switch arm to engage its ‘contact;
cause a second reversal in rotation, whereat the
with the contact of the companion switch arm and
?rst said ?nger turns from said abutment with
to abut the latter arm against its said stop, where
the said switch to render the said by-pass ineffec
by the speed governor is by-passed upon the said 20 tive and the governor eii'ective to reduce motor
reversal, the second said ?nger abutting the ul
speed following the said second reversal, the sec
terior side of the ?nger stop; the said contact arm
ond said ?nger turning from said abutment with
over-running from the engaged posterior conduct
the ulterior side of the ?nger stop through the
said relatively large angle before abutting the
ing element onto the anterior conducting element
to cause a second reversal in rotation from coun 25 said switch, whereby the said contact arm turning
at the said reduced speed stops at the neutral
ter-clockwise to clockwise, whereat the ?rst said
point without over-running.
?nger turns clockwise from said abutment with
the ?rst said switch arm to release the arm to the
4. In control apparatus for moving a load in a
said spring means to disengage the switch arm
desired direction to a desired end position, in
contacts, whereat the governor becomes e?’ective 30 combination, a pair oi’ relatively movable mem
to reduce motor speed following the said second
bers, one of the members being provided with
reversal, the second said ?nger turning from said
electrical conducting means having a neutral
abutment with the ulterior side oi’ the ?nger stop
‘point, the other member having a contact ele
clockwise through the said relatively large angle
ment engageable with the said conducting means,
before abutting the second said switch arm to re 35 drive means including a motor operatively con
engage the switch contacts, whereby the said con
nected through a shaft to move the load, a pair
tact arm turning at the said reduced speed stops
of coils associated therewith, individual ones
at the gap without over-running.
thereof being connected to the said conducting
3. In control apparatus for moving a load in a
means, one of the said pair 01’ members being
desired direction to a desired end position, in 40 selectively adjusted to cause displacement be
combination, a pair of relatively movable mem
tween said neutral point and contact, element
bers, vone of the members being provided with
and engagement thereof with the said conduct
electrical conducting means having a neutral
ing means to rotate the said motor in a direction
point, the other member having a contact ele
to cause an operational movement of the load
ment engageable with the said conducting means,
in a predetermined desired direction, the other
drive means including a motor operatively con
of the said pair of members being turned by the
nected through a shaft to move the load, a pair of
said drive means in a direction to cause align
coils associated therewith, individual ones thereof
ment of contact element and neutral point to
being connected to the said conducting means, one
stop the said drive means, means operative irre
of the said pair of members being selectively ad 50 spective of the direction of said operational
iusted to cause displacement between said neu
load movement to cause said stopping to occur
tral point and contact, element and engagement
after a short terminal movement of the said load
thereof with the said conducting means to rotate
shaft in a predetermined direction, comprising
the said motor in a direction to cause an opera
means to reduce speed of motor rotation, a switch
tional movement of the load in a predetermined 55 for controlling the said speed reducing means, a
desired direction, the other of the said pair of
pair of discs rotatively mounted on the said load
members being turned by the said drive means in
shaft and impositively adapted to partake of the
a direction to cause alignment of contact element
rotation thereof, a stop disposed close to said
and neutral point to stop- the said .drive means,
switch, each of the said discs having a ?nger of
means operative irrespective oi’ the direction of
a ?rst designated disc being interposed between
the said operational load movement to cause said
the adjacent side of said stop and the said switch
stopping to occur after a short terminal move
whereby the said ?rst disc is limited to a rela-_
ment of the ‘said load shaft in a predetermined
tively small angle of turning, the ?nger of the
direction, comprising a speed governor adapted to
other disc being turnable with its disc from the
hold the speed of motor rotation to a reduced 65 ulterior side of the said ?nger stop through a
limit,- a switch for by-passing the speed governor,
relatively large angle to the said switch, the
a pair of discs rotatively mounted on the said
?rst said ?nger during the saidoperational rota
load shaft and impositively adapted to partake of
tion abutting the said stop and the second said _
the rotation“ thereof, a stop disposed close to said
?nger engaging the said switch to render the
switch, each of the said discs having a ?nger, the 70 speed reducing means inoperative during said
?nger of a ?rst designated disc being interposed
operational rotation; the said contact arm over
between the adjacent side of said stop and the
running from the engaged posterior conducting‘
said switch whereby the said first disc is limited
element onto the anterior conducting element to
to a relatively small angle of turning, the ?nger _ cause a reversal in rotation, whereat the ?rst said
of theother disc being turnable with its disc from
?nger turns from the said adjacent side oi.’ the
2,405,629
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14
?nger stop to engage the said switch to maintain
?nger of the other disc being turnable with its
said speed reducing means inoperative, the sec
ond said ?nger abutting the ulterior side of the
?nger stop; the said contact arm over-running
disc from the ulterior side of the said ?nger stop
through a relatively large angle to the said
from the engaged posterior conducting element
onto the anterior conducting element to cause a
second reversal in rotation, whereat the ?rst said
?nger turns from said engagement with the said
switch to render the said speed reducing means
operative to reduce motor speed following the 10
switch.
'
6. In control apparatus for moving a load in a
desired direction to a desired end position, in
combination, drive means including a motor for
moving the load, means including a selectively
adjusted member for controlling the said drive
means to rotate the said motor in a direction
to cause an operational movement‘of the load in
said second reversal, the second said ?nger turn- ‘
a predetermined desired direction and to stop
_ ing from said abutment with the ulterior side
of the ?nger stop through the said relatively
the said drive means with the load in the said
desired end position, and means‘ operative irre
large angle before engaging the said switch,
whereby the said contact arm turning at the said 15 spective of the direction of said operational load
movement to cause said stopping to occur after
reduced speed stops at the neutral point without
a short terminal movement of the motor in a
over-running.
'
~.
predetermined direction, comprising means to
5. In control apparatus for moving a load 1
reduce speed of motor rotation, and a switch
a desired direction to a desired end position, in
combination, drive means including a motor op 20 means actuated by changes in direction of motor
rotation for controlling the said speed reducing
eratively connected through a shaft to move the
load, means including a selectively adjusted
means.
7. In control apparatus for moving a load in a
member for controlling the said drive means to
desired direction to a desired and position, in
rotate the said motor in a direction to cause an
operational movement of the load in a prede 25 combination, drive means including a motor for
moving the load, means including a selectively
termined desired direction and to stop the said
adjusted member for controlling the said drive
drive means with the load in the said desired end
position, and means operative irrespective of the
means to rotate the said motor in a direction to
' direction of said operational load movement to
cause an operational movement of the load in a
cause said stopping to occur after a short ter 30 predetermined desired direction and to stop the
minal movement 01' the said load shaft in a
said drive means with the load in the said desired
predetermined direction, comprising means to
reduce speed of motor rotation, a switch for con
trolling the said speed reducing means, a‘pair
end position, means operative irrespective of the
direction or said operational load movement to
cause said stopping to occur after a short ter
of discs rotatively mounted on the said load 35 minal movement of the motor in one predeter
shaft and impositively adapted to partake of the
mined direction, said latter means comprising
means to change the speed of motor rotation,
and a means actuated by changes in direction of
_ the ?nger o! a ?rst designated disc being‘ inter
motor rotation for controlling the said speed
posed between the adiacent side of said stop and 40 changing means.
the said switch whereby the said ?rst disc is
MICHEL N. YARDENY.
limited to a relatively small angle of turning, the
rotation thereof, a stop disposed close to said
switch, each of the said discs having a ?nger,
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