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Патент USA US2073449

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March 9, 1937.
E. B. JACKSON
2,013,449
CORRECTIVE TIME CONTROLLED SYSTEM
Filed Sept. 24, 1952
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2,373,443
Patented Mar. 9, 1937
UNITED STATES PATENT OFFI€E
2,073,449
CORRECTIVE TIME-CONTROLLED SYSTEM
Edward B. Jackson, Downers Grove, 311., assignor
to Stromberg Electric Company, Chicago, 111.,
a corporation of Delaware
'
Application September 24, 1932, Serial No. 634,683
13 illaims. (Cl. 58-24)
My invention relates to a corrective time-con
trolled system. More speci?cally, it relates to
such a system in which master apparatus sends
out normal impulses for advancing the secondary
5 apparatus for its normal operation and period
ically sends out a number of rapid impulses for
rapidly advancing slow secondary apparatus and
having provisions for periodically reversing the
current for the secondary apparatus to prevent
10 any of the secondary apparatus from getting too
fast.
One of the objects of my invention is to provide
an improved system in which use is made of a
one-way electric valve in the secondary appara
15 tus.
A further object is to provide such a system in
which there are no electric contacts in the sec
ondary apparatus.
Further objects will be apparent from the de
20 scription and claims.
In the drawing, in which my invention is illus
trated,
The single ?gure of the drawing shows some
what diagrammatically the master apparatus,
25 secondary apparatus and corrective apparatus in
a corrective time-controlled system.
The secondary apparatus is of the type in
which the apparatus is advanced step by step by
impulses controlled by the master apparatus.
30 The secondary apparatus may be of many types,
such as secondary clocks, in-and-out time re
corders, job time recorders, etc. Three sets of
secondary apparatus are shown as indicated at
A, B, and C. Each of these comprises an electro
35 magnet I intermittently caused to be energized
by the master apparatus, an armature lever 2
provided with an armature 3 for cooperation
with the electromagnet I, a pawl 4 pivotally
mounted at 5 on the armature lever 2, a ratchet
40 6 driven step by step by the pawl 4, and a spring
‘I for effecting the power stroke of the armature
lever.
The master apparatus shown comprises a pair
of contacts 8 and 9 for sending out the normal
45 impulses, a relay magnet Ill controlled by said
contacts, and an armature contact H controlled
by the relay magnet ID for cooperation with the
contact I2 of the circuit 13 leading to the sec
ondary apparatus.
50
The corrective apparatus comprises contacts
I4 and it‘: for periodically sending out a number
of rapid impulses for rapidly advancing slow sec
ondary apparatus, master-controlled contacts is
and H for periodically cutting in and out the
55 rapid impulse controller, pole changing appara
tus It for reversing the power connections to the
secondary apparatus, master-controlled cam
means i9 for periodically acting on the pole
changing apparatus for effecting the current re~
versal and corrective apparatus in each sec
ondary for cooperation with the corrective sys
tem apparatus just described. The pole changing
apparatus is of conventional type comprising an
electromagnet 2i) controlled by the master-con
trolled contacts 2i and 22, and a pair of arma~ 10
tures 23 controlled by said electromagnet 28 and
serving to reverse the connections of the lines l3
and 211- leading to the secondary circuit with the
power lines 25 and 26 by cooperation with the
15
four contacts 27, 28, 29, and 30.
The corrective apparatus in each secondary
comprises an electromagnet 3! in parallel with
the driving electromagnet l, a one-way electric
valve 32 in this parallel circuit, a rock lever 33
pivotally mounted at 34 and carrying an arma
ture 35 for cooperation with the corrective elec
tromagnet 3i and a controller cam 36 for the
rock lever 33 rotatable with the shaft 31 on which
the ratchet 3 is mounted. The rock lever 33 is
provided with a stop ?nger 33 which, under cer 25
tain conditions, moves in between the lower end of
the actuating rock lever 2 and the electromagnet
l to prevent the lever 2 from being actuated by
the electromagnet. A suitable spring 39 is pro
vided tending to hold the armature 35 of the rock 30
lever 33 away from the electromagnet 3|.
In order to clarify the operation, I will assume
certain time relations. The master cam-con
trolled contacts !6 and ll may be so operated
as to bring the rapid controller l4, l5 into 35
play from 59 minutes and 15 seconds until 59
minutes and 45 seconds, during which time ?f
teen rapid impulses will be sent out to rapidly ad
vance any slow secondary apparatus. The mas
ter cam-controlled contacts 2! and 22 may be so
operated that the pole changing apparatus l8 will
reverse power connections to the secondary ap
paratus from 55 minutes and 10 seconds until
just after the rapid sending period has termi
45
nated, say 59 minutes and 50 seconds.
The one-way electric valve 32 in the secondary
apparatus is so designed that during this short
period of current reversal, the reversed current
will be enabled to pass the one-way valve 32 to
energize the electromagnetic device 3| but so
that with the normal direction of current no cur
rent will be enabled to pass and hence the elec
tromagnet 3! will exert no force on its armature
35 at any time except during the comparatively
short current reversal period. The notch 43 on 55
2
2,073,449
the cam disc 36 of the secondary apparatus is so
located that when the secondary apparatus is in
the position corresponding to the 59th minute,
the notch wil be opposite the ?nger 4| on the
5 rock lever 33 so that when the rock lever 33 is
caused to oscillate, the ?nger M can drop into
the notch 49 and the stop ?nger 38 can move in
between the end of the armature 3 and the elec
tromagnet l and prevent movement of the le
10 ver 2.
In assuming the time periods for the various
operations, a period of current reversal was
assumed which would hold back fast secondary
apparatus only in the event that it was less
15 than ?ve minutes fast. It has been found that
it is seldom that secondary apparatus gets more
than ?ve minutes fast during the course of an
hour so that this ?ve minute correction has been
found to be su?icient for practical purposes.
In describing the operation, in order to facili
tate an understanding thereof, one set of sec
ondary apparatus has been shown as fast com
pared with the master apparatus, one as just in
time with the master apparatus, and one as slow
25 compared with the master apparatus. Assuming
that the fast secondary apparatus is not more
than four minutes ahead of the master apparatus,
the current reversal for the secondary apparatus
will take place before the notch at] in the control
disc 36 comes opposite the ?nger ill on the rock
lever 33 so that impulses will be effective in the
corrective electromagnet 3 !. Just after the ?fty
ninth actuation of the rock lever has taken effect,
the notch 653 on the control disc 35 will be in po
35 sition to receive the ?nger All on the rock lever
33 so that any further impulses will be ineffective‘
to advance the ratchet 6 because the stop ?nger
38 will be interposed between the armature 3
and the electromagnet I, and will prevent move
ment of the rock lever. In this connection, it
is explained that the disabling magnet Si is much
smaller than the actuating magnet i and has small
relatively light moving parts and will therefore
respond to an impulse much quicker than the
45 heavy actuating magnet i and its associated parts.
This fast secondary apparatus will therefore be
held at the ?fty-ninth minute position until the
normal direction of current is resumed. This
will prevent the rapid impulses as well as the
'50
normal frequency impulses from being e?ective
until normal direction of current is resumed.
The secondary apparatus which is on time with
the master at the beginning of the corrective
period will stay in time because the rapid impulses
55 sent out will be ine?ective for the same reasons
pointed out in connection with the fast sec
ondary apparatus.
7
The slow secondary apparatus will remain slow
until the rapid impulses are sent out when it
60 will be rapidly advanced up to a position corre
sponding to the ?fty-ninth minute when it will
The direction in which current will pass through
the valves 32 is indicated by symbols.
Further modi?cations will be apparent to those
skilled in the art andit is desired, therefore, that
the invention be limited only by the prior art and
the scope of the appended claims.
Having thus described my invention, what I
claim and desire to secure by Letters Patent is:
1. A corrective time-controlled system com
prising master, secondary and corrective appa 10
ratus, said secondary apparatus comprising an
intermittently driven electromagnetic actuator
(responsive to electrical impulses in either direc
tion) and an intermittently operated member
actuated by said actuator, said master apparatus 15
comprising means for sending out normal im
pulses for said secondary electromagnetic actu
ator, and said corrective apparatus comprising
means for periodically sending out a number of
rapid impulses for rapidly advancing slow sec 20
ondary apparatus, means controlled by the master
apparatus for periodically reversing the current
for the secondary apparatus, means associated
with each secondary for stopping it when it
reaches a predetermined point in its cycle to 25
keep it from getting too fast, comprising a circuit
in parallel with the circuit of said electromagnetic
actuator and a one-way electric valve in said cir
cuit, and means depending on the current in the
one-way valve circuit and on the position of the 30
intermittently operated member for preventing
said secondary electromagnetic actuator from
actuating said intermittently operated member
when the intermittently operated member reaches
a predetermined position vcomprising an electro 35
magnetic actuator in said parallel circuit and dis
abling means controlled by said parallel circuit
electromagnetic actuator and by the position of
the intermittently operated member for pre
venting said intermittently driven actuator from
actuating said intermittently operated member
when the latter reaches said predetermined po
sition, said parallel circuit electromagnetic actu
ator comprising an armature normally held
against movement but enabled to operate when 45
the secondary apparatus reaches a predetermined
stage of its cycle, said intermittently driven elec
tromagnetic device comprising an armature and
said disabling means comprising means for hold
ing said armature against movement.
2. A corrective time-controlled system com
50
prising master, secondary and corrective appa
ratus, said secondary apparatus comprising an
intermittently driven electromagnetic actuator
(responsive to electrical impulses in either di
55
rection) and an intermittently operated member
actuated by said actuator, said master apparatus
comprising means for sending out normal im—
pulses for said secondary electromagnetic actu
ator, and said corrective apparatus comprising
means for periodically sending out a number of
60
cease to advance by reason of the fact that the
notch at in the control disc 35 will then be oppo
site the ?nger 45 on the rock lever 33 and the
rapid impulses for rapidly advancing slow sec
ondary apparatus, means controlled by the mas
ter apparatus for periodically reversing the cur
actuating rock lever 2 will be'disabled until hor
rent for the secondary apparatus, means asso 65
ciated with each secondary for stopping it when
mal direction of current is resumed. When nor
mal direction of current is resumed at 59 minutes ‘ it reaches a predetermined point in its cycle to
and 50 seconds by master clock time, the next keep it from getting too fast, comprising a circuit
in parallel with the circuit of said electromagnet
70 impulse will cause all of the clocks which have
been lined up at the ?fty-ninth minute to- start ic actuator and a one-way electric valve in said 70
circuit, and means depending on the current in
off together for their next cycle.
.
The direction of normal impulses in the circuit the one-way valve circuit and on the position of
the intermittently operated member for prevent
l3 may be indicated by the arrow N and the di
v375
rection of the reverse impulses by the arrow R.
ing said secondary electromagnetic actuator from
actuating said intermittently operated member
75
3
2,073,449
when the intermittently
operated
member
reaches a predetermined position comprising an
electromagnetic actuator in said parallel circuit
and disabling means controlled by said parallel
circuit electromagnetic actuator and by the po
sition of the intermittently operated member for
preventing said intermittently driven actuator
from actuating said intermittently operated
member when the latter reaches said predeter
mined position, said parallel circuit electromag
netic actuator comprising an armature normally
held against movement but enabled to operate
when the secondary apparatus reaches a prede
termined stage of its cycle.
15 3. A corrective time-controlled system com
prising master, secondary and corrective appa
ratus, said secondary apparatus comprising an
intermittently driven electromagnetic actuator
(responsive to electrical impulses in either direc
tion) and an intermittently operated member
actuated by said actuator, said master apparatus
comprising means for sending out normal im
pulses for said secondary electromagnetic actu
ator, and said corrective apparatus comprising
25 means for periodically sending out a number of
rapid impulses for rapidly advancing slow sec
ondary apparatus, means controlled by the mas~
ter apparatus for periodically reversing the cur
rent for the secondary apparatus, means asso
30 ciated with each secondary for stopping it when
it reaches a predetermined point in its cycle to
keep it from getting too fast, comprising a cir
cuit in parallel with the circuit of said electro
magnetic actuator and a one-way electric valve
in said circuit, and means depending on the cur
rent in the one-way valve circuit and on the po
sition of the intermittently operated member for
preventing said secondary electromagnetic actu
ator from actuating said intermittently operated
40 member when the intermittently operated meme
ber reaches a predetermined position, compris—
ing an electromagnetic actuator in said parallel
circuit and disabling means controlled by said
parallel circuit electromagnetic actuator and by
45 the position of the intermittently operated mem
ber for preventing said intermittently driven
actuator from actuating said intermittently oper
ated member when the latter reaches said prede
termined position, said intermittently driven
50 electromagnetic device comprising an armature
and said disabling means comprising means for
holding said armature against movement.
4. A corrective time-controlled system com
prising master, secondary and corrective appa
ratus, said secondary apparatus comprising an
intermittently driven electromagnetic actuator
(responsive to electrical impulses in either di
rection) and an intermittently operated member
actuated by said actuator, said master apparatus
comprising means for sending out normal im
pulses for said secondary electromagnetic actu
ator, and said corrective apparatus comprising
means for periodically sending out a number of
rapid impulses for rapidly advancing slow sec
ondary apparatus, means controlled by the mas—
ter apparatus for periodically reversing the cur
rent for the secondary apparatus, means asso
ciated with each secondary for stopping it when
it reaches a predetermined point in its cycle to
70 keep it from getting too fast, comprising a cir
cuit in parallel with the circuit of said electro
magnetic actuator and a one-way electric valve
in said circuit, and means depending on the cur
rent in the one-way valve circuit and on the po-
75 sition of the intermittently operated member for
preventing said secondary electromagnetic actu
ator from actuating said intermittently operated
member when the intermittently operated mem
ber reaches a predetermined position comprising
an electromagnetic actuator in said parallel cir
cuit and disabling means controlled by said paral—
lel circuit electromagnetic actuator and by the
position of the intermittently operated member
for preventing said intermittently driven actuator
from actuating said intermittently operated
member when the latter reaches said predeter
mined position.
5. A corrective time-controlled system com
prising master, secondary and corrective appa
ratus, said secondary apparatus comprising an 15
intermittently driven electromagnetic actuator
(responsive to electrical impulses in either direc
tion) and an intermittently operated member
actuated by said actuator, said master apparatus
comprising means for sending out normal im 20
ulses for said secondary electromagnetic actu
ator, and said corrective apparatus comprising
means for periodically sending out a number of
rapid impulses for rapidly advancing slow sec
ondary apparatus, means controlled by the mas
ter apparatus for periodically reversing the cur
rent for the secondary apparatus, means asso
ciated with each secondary for stopping it when
it reaches a predetermined point in 1:5 cycle to
keep it from getting too fast, comprising a circuit 30
in parallel with the circuit of said electro
magnetic actuator and a one-way electric valve
in said circuit, and means controlled by the cur
rent in the one-way valve circuit and by the posi
tion of the intermittently operated member for 35
preventing said secondary electromagnetic actu
ator from actuating said intermittently operated
member when the intermittently operated mem
ber reaches a predetermined position comprising
an electromagnetic
circuit.
actuator in said parallel
'
6. A corrective time-controlled system com
prising master, secondary and corrective appa
ratus, said secondary apparatus comprising an
intermittently driven electromagnetic actuator
(responsive to electrical impulses in either direc
tion) and an intermittently operated member
actuated by said actuator, said master apparatus
comprising means for sending out normal im
pulses for said secondary electromagnetic actu
ator, and said corrective apparatus comprising
means for periodically sending out a number of
rapid impulses for rapidly advancing slow sec
ondary apparatus, means controlled by the mas
ter apparatus for periodically reversing the cur
rent for the secondary apparatus, means asso
ciated with each secondary for stopping it when
it reaches a predetermined point in its cycle to
keep it from getting too fast, comprising a cir
cuit in parallel with the circuit of said electro 60
magnetic actuator and a one-way electric valve
in said circuit, and means controlled by the cur
rent in the one-way valve circuit and by the posi
tion of the intermittently operated member for
preventing said secondary electromagnetic actu
ator from actuating said intermittently operated
member when the intermittently operated mem
ber reaches a predetermined position.
7. In a secondary apparatus for use in a time
controlled system, an impulse magnet, an arma
ture for said magnet by which all advancing
movements of said apparatus are effected under
control of impulses received by said magnet, a
quick acting magnet associated with said impulse
magnet and concurrently energized therewith, 75
4
2,073,449
and means controlled by said quick-acting mag
net and operative only when said apparatus is in
a particular predetermined chronological posi
tion for preventing movement of said armature.
8. In a corrective time-controlled system, mas
ter apparatus and secondary apparatus con
nected by a control circuit, means in said master
11. In an impulse operated device, an impulse
apparatus for transmitting current impulses over
said circuit to said secondary apparatus and for
periodically reversing the polarity of said im
pulses, an impulse magnet in said secondary
apparatus included in said circuit and energized
magnet responsive to impulses of either polarity,
an armature controlled by said magnet for effect
ing all movements of said device, a second mag 10
net associated with said impulse magnet, means
for rendering said second magnet responsive only
by all of said impulses, an armature for said mag
to an impulse of a particular polarity, and means
net for e?ecting the advance of said secondary
apparatus, and discriminating means in said sec
dependent upon the position of said device and
ondary apparatus associated with said control
circuit and responsive to current impulses of
one polarity for mechanically blocking said
armature against movement when said appa
ratus is in a predetermined chronological posi
tion and unresponsive to current impulses of re
verse polarity, thereb-y permitting said second
ary apparatus to be advanced by said impulse
magnet.
25
of special character, and means controlled by
said second magnet when energized with said
device inv a particular predetermined position for
blocking said armature against movement, there
by preventing movement of said device by the 2:
energization of- said impulse magnet.
9. In
a
corrective
time-controlled
system
wherein secondary apparatus is controlled by im
pulses transmitted over a control circuit from a
master apparatusyan impulse magnet in said
circuit and an armature therefor for effecting
30 all advancing movements of said secondary ap
paratus, said magnet being energized by each of
said impulses, discriminating means in said sec
ondary apparatus associated with said control
circuit for blocking said armature against move
ment to prevent advance of said apparatus, said
means .being responsive to current impulses of
one polarity only, and means controlled by the
chronological condition of said secondary appa
ratus for preventing the effective operation of
40 said discriminating means.
10. In an impulse operated device, an impulse
magnet responsive to impulses to effect advanc
ing movement of said device, an armature for
said impulse magnet, a second magnet associated
with said impulse magnet, means for rendering
said second magnet responsive only to an impulse
controlled by said second magnet for blocking
said armature against movement, thereby ren
dering ineffective the energization of said im
pulse magnet by said impulse of said particular
polarity.
12. In a secondary apparatus for use in a time
controlled system, an impulse magnet, an arma
ture and an operating pawl for said magnet for
effecting advancing movement of said apparatus
responsive to impulses received by said magnet,
and means operative by a received impulse and 25
dependent upon the chronological condition of
said apparatus for positively limiting the move
ment of said armature resulting from the energi
zation of said magnet by said impulse to render
said pawl ineffective to advance said apparatus, 30
13. In a secondary apparatus for use in a time- '
controlled system, an impulse magnet energized
by each impulse received by said apparatus, an
actuating member having a back and forth move
ment controlled by said magnet, a ratchet and 35
pawl operated by said member to advance said
apparatus, and means operative by a received
impulse only when said apparatus is in a par
ticular predetermined chronological position for
mechanically blocking said actuating member so
that its movement is restricted to a fraction of
its normal operating movement to render the
cnergization of said magnet by said impulse in
effective to cause advance of said apparatus.
545
EDWARD B. JACKSON.
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