US2387358A - Controller for motor-driven printing presses and other machines - Google Patents

Description

Oct. 23, 1945. w. H. ROUSE 2,387,358

CONTROLLER FOR MOTOR DRIVEN PRINTING PRESSES AND QTHER MACHINES Filed Feb. 11, 1943 Patented Oct. 23, 1945 UNITED STATES PATENT OFFICE l L] CONTROLLER FOR MOTOR-DRIVEN PRINT- ING PRESSES AND OTHER MACHINES William H. Rouse, Milwaukee, Wla, asslgnor to Cutler-Hammer, Inc., Milwaukee, Wis., a corl poratlon of Delaware Application February 11, 1943, Serial No. 475,527

12 Claims.

signal intent to start and which delay starting for twice operated for motor starting will serve for both forward and reverse operations.

Various other objects and advantages of the invention will hereinafter appear.

at least a short period after commencement of One embodiment of the invention is illustrated signalingin the accompanying drawing, it being understood A controller of this general character is disthat the controller shown therein which is especlosed in the Feldhausen Patent No. 2,241,589, cially designed for a reversing printing press is May 13, 1941, issued to the assignee of the instant susceptible of various modifications without deapplication, this patent showing a non-reversing 0 pa ting from t e Sc p of the appended Claimscontroller so designed that the inch button or the The controller diagrammatically illustrated in on button must be twice depressed to effect startthe drawing will now be described. ing, the first depression being utilized to start Athree-phase slip-ring type induction motor i, signaling which is continued pending the second having primary terminals 2, 3 and and Seconddepression of the button for motor starting. In ary termnals 5, 8 and l, is supplied with power 1 this system requirement of repeated operation of from the three phase power mains L U and L the starting button to effect starting only after at through a pair of electromagnetic reversing least a short period of signaling is effected through switches 8 and 9. The switch 8 is provided with the medium of relays which are restored to initial an energizing winding it, normally open main condition only upon stopping, and due to this fact contacts l 8 and 8 normally open auxiliary and to the fact that the signal control involves contacts 8, 8, and normally closed auxiliary con utilization of relays not used generally in control tacts 8 8 8 and 8*. Contacts 8* are provided of motor driven machines a simpler and more with means to retard their opening for a short readily and widely applicable signaling control of period after energization of relay 8. The switch the character indicated has become desirable. 5 8 is provided with an energizing winding 9', nor- Also it has become desirable to render more mally open main contacts 9, 9 and 9 normally readily applicable such a signaling control to reopen auxiliary contacts 9, and normally closed versing controllers, such for example as that auxiliary contacts 9 and 9 shown in the Seeger Patent 1,878,334, September The controller further includes a normally 20, 1932. also issued to the assignee of the instant closed stop push button switch ill, a run push application. button switch II, having three point normally The present invention has among its objects to open contacts II, and normally closed contacts provide a simplified form of the aforementioned li a normally open three-point inch push but- Feldhausen control which may be readily applied ton switch 12, and a normally open three-point to controllers generally and to a reversing con- "reverse" push button switch l3. troller such for example as that of the type shown To set the speed at which it is desired to operate in the aforementioned Seeger patent, the signalthe press the controller includes a speed setting ing system to function for both forward and device I, having stationary contacts 14, M H reverse operations. and I, and movable contacts M It I4 and I4 Another object is to provide a signaling control The movable contact H is arranged to engage the of the type indicated wherein the means rendering stationary contact It in all running positions of the signaling device responsive upon the first acthe speed setting device. The movable contact I4 tuation of the manual starting switch and delaycomprises spaced sections to engage the stationary ing motor starting pending a second actuation of contact I4 only in the first, third, fifth and said switch will be reset immediately upon startseventh positions. The movable contact I l COlIling, rather than upon stopping as in the aforeprises spaced sections to engage the stationary mentioned Feldhausen system. contact H only in the second, third, sixth and Another object is to provide a signaling system seventh positions, and the movable contact [4 15 of the character last mentioned wherein the signal arranged to engage the stationary contact M only device will be free from influence by the manual in the fourth to the seventh position, inclusive. control means while the motor is in operation in All of the movable contacts are electrically inter; either direction. connected.

Another object is to provide a reversing con- The controller also includes the following electroller wherein a single set of relays to control the tromagnetic relays: Relay l5 having an energizsignal device and to compel the start button to be ing winding i5", normally open contacts i5", l5

and IE relay i6, having an energizing winding I6 normally open contacts l5 and H5 and normally closed contact Hi torque relay l1, having an energizing winding ll, normally open r nain contacts ll 81 and li normally open auxiliary contact W and normally closed auxiliary contact il initiating relay i 8 having an energizing winding l8, normally open contact l8 and normally closed contact I8; signal relay l9 having an energizing Winding I 9, and normally open contacts i9. 89 and it; compelling relay 20, having an energizing winding 20 and normally open contacts 20 and 20; and relay 2|. The latter relay is provided with a. center pivoted lever which is adapted to bridge a pair of stationary contacts '2 i l. The lever is so arranged that it is frictionally held in any position to which it is moved by an external force. In proximity to the right end of the lever is an electromagnet having a movable armature and an energizing winding 2 i. When this winding is energized, the armature abuts the lever to move it counterclockwise to the circuit closed position. In proximity to the left end of the lever is another electromagnethaving a shunt energizing winding 2 i which tends to move the armature upwardly to rotate the lever in a clockwisedirem tion and open the contacts of the relay, and a series coil 2 I which is arranged to hold the armature in the down position and thus counteracts the pull of the coil 25.

An electromagnetic cell 23 provides for an audible signal under certain conditions which will.

be explained hereinafter.

The speed of the motor is controlled through the medium of resistors which are connected in delta across the secondary terminals 5, 6 and l of the motor 9. In the present instance, the resistor of each branch of the delta comprises three sections. One resistor comprises sections 3!, 32 and 33. another comprising sections 4!, 42 and 43, and the third comprising sections 5i, 52 and 53, the sections 33 and Si being connected together through the winding 28 of relay 2!. The sections 3!, M and 5! may be short clrcuited by normally open contacts itc til and w of providing for short-circuiting of variable portions of said sections by the contacts H W and li respectively, of the torque switch 87.

(Due terminal of each energizing windin Su ti and 62 is connected to theline L while the other terminals of said windings are connected to the contacts M, M and N respectively, of the speed setting device it.

When the lines U, L and L are energized and the controller is in the condition shown in the diagram, the wire 7i! is energized, being connected to line L through the normally closed stop push button switch it). If new the inch push button is depressed a circuit is established from wire id over the center contact of push button switch IE, to wire 1! and thence through winding it! of relay E8 to line L. The relay i8 thereupon completes a circuit from wire it, through contacts it, 8 3 and winding w to line L. The relay I9 is thus energized and closes a circuit from wire '10 through contact 19 and the signaling bell 23 to line L causing said bell to ring. Closure of contact l-EI closes a maintaining circuit for winding l9 paralleling contacts 18 If now the inch button [2- is released the relay l8 will be de-energized and contact 18* will be opened, but the relay la'will be maintained energized through the parallel circuit aforementioned. Relay i8 when thus tie-energized closes a circuit from wire 10, through contacts 18, 19 and windin 20 to line L Thus the relay 20 is energized. If new the inch button is depressed a second time a circuit is established from wire 10 through winding 8, contacts 9 and 20 to line L This energizes the forward main switch 8 and closes the contacts 8*, 8 and W, to connect the primary winding of the motor to the lines L ,-L and L for forward rotation. Response of switch 8 opens the contacts 83, thereby de-energizing the relay is which in turn opens the contacts N and terminates current supply to the signal device 23, which meanwhile has been sig- "naling. De-energization of relay is also opens the contacts t9. which opens the energizing circuit of the relay 20 and the latter drops out. A further circuit is established from 'wire 10 through push button switch l2, time delay contacts 8 and through winding 11 to line-L This energizes relay l1 and it responds to close its normally open main contacts H, I! and ll, thereby short circuiting an adjustable portion of each of the sections 3|, 4| and 5! of the secondary resistance of the motor. Response of the switch 8 also closes the contacts 8, thereby establishing for winding 8 a connection from its lower terminal to line L in parallel with the contacts 20 so that the switch 8 remains energizedwhen the relay 20 is de-energized. The motor thus starts to accelerate with part of its secondary resistance short circuited to overcome the friction of rest of the machine. After a given time determined by its time delay device the contacts 8 open thereby de-energizing the winding H whereupon the relay l1 reinserts the resistors aforementioned into the motor circuit. The press will thereupon move at its lowest speed until the inch button is released whereupon the motor is stopped and the controller is restored to the original condition.

If it is desired to operate the press continuously the push button switch ll is depressed. This again energizes relay [8, the circuit extending through the normally open contacts of push button ii over the center contact thereof to wire 1| and thence to and through winding ill to line L Thereupon relay l8 responds to energize relay 19 in the manner aforedescribed and the signal bell will. ring, the motor not starting. If now the running button is released relay l8 will again be lie-energized and relay 20 will be energized as aforedescribed. If then the running button I l is again depressed a circuit is established from wire ill, through the normally open contacts ll, winding i5, contacts 9 and contacts 20 to line L and relay l5 will be energized to close a maintaining circuit for itself from wire 10 through contacts I5 to winding l5 which has parallel connections through contacts 20 and 8, so that relay l5 will remain energized upon release of the push button ll following response of switch 8. A circuit is also established from Wire 10, through contacts i5, winding 8, contacts 9 contacts 20,

start the motor in a forward direction of rotaa,sa7,sos 3 tion, whereupon the switch I establishes again for itself a maintaining circuit paralleling contacts 20, through contacts I, as aroredescribed and remains energized upon release of the push button ll. Energization of the switch 8 opens the contacts I, thereby de-energizing relay I! which in turn de-energizes relay 20 and the bell 23 stops ringing. Also upon closure of contacts 15, a temporary circuit is established through contacts t and winding H", to line L so that the torque switch again short circuits the starting or torque resistance as described before. Upon energ'ization of switch 8 and relay I! the contacts and contacts 11*, respectively, are closed, thereby establishing a circuit from line Ill, through push button switch II, to and through winding 2|; contacts l1 and I to line L. The armature energized by the coil 2! is thus lifted to move the lever of relay II to the closed circuit position if it is not already in thatposition. After a certain time during which the motor accelerates, the time delay contacts 8 operi, thereby deenergizing coil i!- which causes opening of the contacts il andde-energization of the winding II of relay II. It will further be observed that upon energizatlon of the switch 8 the winding 2| of relay ii is short circuited so that it has no effect upon the relay 2|.

Ifit is desired to operate the press at a speed above the minimum speed the controller I4 is moved to one of the positions I to 1. Assuming that the controller is moved to position 4, then upon release of the push button H after the second depression thereof a circuit is established from wire 10, through contacts li contact I5 and contact II, to contact ll, through the segments ll, ll, H and H to contact and thence through winding 60' to line I2. Thereupon the switch 6! closes its normally open contacts to short-circuit corresponding sections of the secondary resistance of the motor and to bring it up to a speed corresponding to such resistance commutation. If, on the otherhand, the controller I4 has been moved to any other of its positions the speed of the motor will be different, depending upon the amount of resistance short-circuited.

If the machine is standing still and it is desired to operate it in the reverse direction at slow speed. the push button switch i3 is depressed. thereby energizing again relays it and lland signaling device 23. Upon release of the push button the relay I8 will be de-energized but relay I! will remain energized through its maintaining circuit as described before. Also upon release of the push button II the relay ll will through its normally closed contacts ll", energize relay 20, while relay it remains energized to continue the operation of the signaling device II. Upon the second depression of the push button I! the relay ll is again energized and thereby completes circuit from wire 10 to and through winding 9 and contacts I and li to line L. This energizes reverse switch 9 for reverse drive and switch 9 in responding de-energizes relay I! which in turn de-energizes relay I0. Reverse operation continues only so long as push button I! is held depressed, its release de-energizing switch 9.

When it is desired to stop the press when runing in forward direction the push button switch "I is depressed momentarily. This de-energizes the switches and I and disconnects the motor from the line in the forward direction. Upon reclosure of contacts 8' of switch I, a circuit is established from line L through contacts 2|", which are closed by the prior action of the relay 2!, through energizing coil 16, contacts 8 to line L. The relay It then closes, and, assuming that switch Ill has been reclosed by manual release of its push button, a circuit is established from conductor Ill to and through contact li winding 8, contacts 8* and It", to line U, whereupon the reverse switch 9 is energized to connect the motor to the line for reverse rotation. The high inrush current of the motor produces a strong pull of the winding 2|, opposing the pull oi the winding 2l, which upon closure of the switch I has impressed upon it the full potential between the lines L and L. As the motor slows down and the current in the secondary winding decreases, the pull of the winding 2l overcomes that of the winding 2!, and moves the lever of the relay II to the circuit open position. This de-energizes the relay l6 and the same opens the energizing circuit of the reverse switch 9, thus disconnecting the motor from the line and the motor comes to a standstill.

I claim:

1. In a motor controller, in combination, an electro-responsive motor starting switch, a. manual switch through the medium of which the former switch may be rendered responsive, a signaling device, and means acting upon a given operation 01' said manual switch to render said signaling device responsive and acting upon subsequent given manipulation of said manual switch to effect response of said starting switch, said means being under the control of said electroresponsive starting switch for reset of said means immediately upon response of said starting switch,. to be effective for the aforementioned functions when restarting through the medium of said manual switch is attempted.

2. In a motor controller, in combination, an electroresponsive motor starting switch, a manual switch through the medium of which the former switch may be energized, a signaling device, and means effective upon a given operation of said manual switch to render said signaling device responsive and effective upon subsequent given manipulation of said manual switch to energize said electroresponsive starting switch, said means being under the control a of said starting switch for termination of signaling and for reset of said means immediately upon response of said starting switch, to render said means eifective for the aforementioned functions when restarting through the medium of said manual switch is attempted.

3. Ina motor controller, in combination, an electroresponsive motor starting switch, a manual switch through the medium of which the former switch may be energized, a signaling device, and means effective upon a given operation of said manual switch to render said signaling device responsive and effective upon subsequent given manipulation of said manual switch to energize said electroresponsive switch and to terminate signaling by said device, said means being under the control of said starting switch for reset of said me ns immediately upon response of said start g switch, to render said means effective for the aforementioned functions when restarting through the medium of said manual switch is attempted, and to remove said signaling device from influence by said manual switch while said starting switch is energized.

4. In a motorcontroller, in combination, an electroresponsive motor starting switch, a plurality of manual switches through the medium of any one of which the former switch may be energized, a signaling device and means effective to render said signaling device responsive upon a given operation of any one of said manual switches and effective upon subsequent given manipulation of the same manual switch to energize said electroresponsive starting switch, said means being under the control of said starting switch for reset of said means immediately upon response of said starting switch, thereby to render said means effective for the aforementioned functions when restarting through the medium of any one of said manual switches is attempted.

5. In a motor controller, in combination, an electroresponsive motor starting switch, a plurality of manual switches through the medium of any one of which the former switch may be energized, a signaling device, and means effective to render said signaling device responsive upon a given operation of any one of said manual switches and effective upon subsequent given manipulation of the same manual switch to energize said electroresponsive starting switch, said means being under the control of said starting switch for reset of said means immediately upon energization of said starting switch, thereby to render said means effective for the aforementioned functions when restarting through the medium of any of said manual switches is attempted and to free said signaling device from influence by any of said manual switches whil said starting switch is energized.

6. In a motor controller, in combination, electroresponsive means to start the motor for either forward or reverse operation, manual means through the medium of which the former means may be rendered responsive, a signaling device, and means effective upon operation of said manual means in attempt to effect starting in either direction, to render said signaling device responsive and upon subsequent given manipu lation of said manual means, effective to energize said electroresponsive starting means for motor operation in the selected direction, said starting means being efiective upon response thereof, to reset the third mentioned means to be effective for the aforementioned functioning thereof when restarting through the medium of said manual means is attempted.

7. In a motor controller, in combination, electro-responsive means to start the motor for either forward or reverse operation, manual means through the medium of which the former means may be rendered responsive, a signaling device, and means effective upon operation of said manual means in attempt to effect starting in either direction, to render said signaling device responsive and upon subsequent given manipulation of said manual means effective to energize said electroresponsive starting means for motor operation in the selected direction, said starting means being effective upon response thereof, to reset the third mentioned means to be effective for the aforementioned functioning thereof when restarting through the medium of said manual means is attempted, and the third mentioned means when reset preventing further control of said signaling device by said manual means while said starting means is energized.

8. In a motor controller, in combination, electroresponsive starting switches for forward-and reverse operations respectively, individual manual control switches for said electroresponsive switches, a signaling device and means rendering said signaling device responsive upon .a given initial operation of any of said manual switches and rendering the respective electroresponsive starting switch responsive upon a subsequent given manipulation of the same manual switch, each of said starting switches upon responding effecting immediate reset of said means, thereby to prepare said means for functioning as aforesaid when restarting through the medium of any of said manual switches is attempted.

9. In a motor controller, in combination, electroresponsive motor starting switches for forward and reverse operations respectively, individual manual control switches for said electroresponsive switches, a signaling device and means rendering said signaling device responsive upon a given'initial operation of any of said manual switches, and rendering the respective electroresponsive starting switch responsive upon a sub-.

sequent given manipulation of the same'manual switch, each of said starting switches upon responding effecting immediate reset of said means, thereby to prepare said means for functioning as aforesaid when restarting through the medium of either of said manual switches is attempted, and said means while either of said starting switches is energized freeing said sig-' naling device from influence by any of said manual switches.

10. In a motor controller, in combination, an electroresponsive motor starting switch, a manual switch through the medium of which the former switch may be caused to respond, a signaling device, and means comprising two relays responsive progressively to effect response of said signaling device in response to a given operation of said manual switch, one of said relays releasing in response to another given operation of said switch and the other being selfmaintaining to continue signaling, said means also comprising a third relay energized by the first mentioned relays when the one releases and the other is self-maintained, said third relay when energized rendering another given operation of said manual switch effective to render said electroresponsive starting switch responsive and the latter in responding de-energizing and self-maintained relay to discontinue signaling and also de-energizing said third relay.

11. In a motor controller, in combination, an electroresponsive motor starting switch, a plurality of manual switches through the medium of any one of which response of said starting switch may be efiected, a signaling device, and means comprising two relays responsive progressively to effect response of said signaling device in response to a given operation of any of said manual switches, one of said relaysreieasing in response to another given operation of the same manual switch and the other relay being self-maintaining to continue signaling, said means also comprising a third relay energized by the first mentioned relays when the one releases and the other is self-maintained, said third relay when energized rendering another given operation of said same manual switch effective to energize said starting switch and the latter in responding de-energizing said selfmaintained relay to discontinue signaling and also de-energizing said third relay.

12. In a motor controller, in combination, separate electroresponsive motor switches respectively to afford forward and reverse operations of the motor, manual switches starting his individual to said forward and reverse switches to effect response of the latter selectively, a signaling device, and means comprising two relays responsive sequentially to eflect response of said signaling device in response to a given operation 5 of any of said manual switches, one of said relays releasing in response to another given operation of the same manual switch and the other relay being self-maintaining to continue signaling, said means also comprising a third relay 1o rendered responsive by the first mentioned relays when the one releases and the other is selfmaintained, said third relay'when energized rendering another given operation 01' said same manual switch efiective to cause response of its respective starting switch, and the latter in responding de-energizing said self-maintained relay to discontinue signaling and also de-energizing said third relay.

WILLIAM H. ROUSE.

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