US2232077A

US2232077A - System of circuit control

Info

Publication number: US2232077A
Application number: US336173A
Authority: US
Inventors: Joseph J Rosecky
Original assignee: Cutler Hammer Inc
Current assignee: Cutler Hammer Inc
Priority date: 1940-05-20
Filing date: 1940-05-20
Publication date: 1941-02-18
Anticipated expiration: 1958-02-18
Also published as: GB545600A

Description

Feb. 18; 1941. J. J. ROSECKY SYSTEM OF CIRCUIT CONTROL Filed May 20, 1940 Patented Feb. 18, 1941 PATENT OFFICE SYSTEM OF CIRCUIT CONTROL Joseph J. Rosecky, Milwaukee, Wis, assignor to Cutler-Hammer, Inc., Milwaukee, Wis, a corporation of Delaware Application May 20, 1940, Serial No. 336,173

6 Claims.

This invention relates to improvement in systems of circuit control, and more particularly to illumination control systems comprising a plurality of lamp circuits which provide for presetting a plurality of intensities of illumination for each circuit and effecting transition from each preset intensity to another at selective rates for the several circuits, which rates are proportional to the degrees of change in illumination intensities to be effected in the respective'circ'uits.

An object of the invention is to provide a simple system of the aforementioned character which is equally applicable to a variety of voltage control apparatus for the lamp circuits.

Another object is to provide a system which may employ resistance or reaction type of potentiometers for piloting or controlling the sender control circuits.

Another object is to provide a system including individual circuit and master controls whereby transition of the intensity of illumination of an individual circuit from one preset value to another upon transfer from one master circuit to another may be effected in a gradual and continuous manner.

Another object is to provide a. remote control system of the aforementioned nature in which a control current between the individual circuit control and the receiver flows only during changes in the illumination intensity of the respective lamp circuit.

Another object is to provide an illumination control system including a plurality of preset master controllers combined with a single selector, and with individual intensity control means for the respective lamp circuits.

Other objects and advantages will hereinafter appear. I

An illumination control system of the aforementioned type is illustrated and described in a copending application of Richard B. Hunter, Serial No. 280,448, filed June 22, 1939, and assigned to the same assignee as the presentinvention (which application has resulted in Patent No.:2,225,994, granted December 24, 1940), the present invention diilering from the disclosure of said Hunter application in respect of providing a, single iader control unit cooperating with a plurality of scene and/or group master controllers to provide for presetting a plurality of scenes and to gradually change from one scene preset to another.

The accompanying drawing is a diagram of a system incorporating the invention. The system comprises two groups of lamps l and 2, respectively. Energy is supplied to the lamps and to the control circuits from the alternating current bus bars L and L The currentior the lamps I is supplied through an autmtransformer dimmer 3 wl'iicl'i has its primary winding connected across the lines U, L and which is provided with a sliding contact brush 4 by means of which a variable secondary voltage derived from the transformer may be impressed upon the lamps. The brush :3 connects the various taps of the transformer winding selectively with bar 5 to which one terminal of the lamp circuit is connected, While the other terminal of the lamp circuit connected to the line L The brush 4 may be moved along the transformer taps and bar 5 a screw t which is driven by a motor 1, provided with reversing windings, and which motor is controlled by a relay 8.

The reiay ii comprises a lever 3 pivoted at its center and provided at each of itsends with magnet cores 8*, said lever being normally biased to an intermediate or neutral position by any suitable means, such as a spring (not shown). The cores 8 are surrounded by polarizing coils 8 which are so wound and so connected across the lines L L that the polarity of both cores is in the same direction. A second set of coils li is arranged on the cores 8*, but wound in opposite directions relatively to each other so that a current flowing therein unbalances the pull on the two to cause rotation of the armature in one direction or the other, depending upon the direction. of the current in the coils 8 The lever 3 is provided with a contact arm 8 which when the lever rotates makes contact with stationary contacts ii or 8 to thereby energize one or the other of the reversing windings of the I motor l and cause the latter to rotate in a corresponding direction.

The circuit arrangement for the lamps 2 and any oth r additional like circuits is the same as that thus far described for the lamps I.

The system illustrated further includes a fader control potentiometer H which may be of the resistance or the auto-transformer type, the latter type being illustrated. The potentiometer II is connected with its end terminals across the lines U, L and is provided with a sliding contact ii= by means of which the value of the derived voltage may be varied. A master potentiometer- !2 comprising two like sections i2 and [2 which sections are connected between the contact 1 i on one hand and the lines L and L respectively,

includes similar transformers I 4 and IS, the secondary windings N and [5, respectively, of which are connected in series with each other between the brush l2 and the coils I, a circuit being completed over a contact bar I6, to the adjustable brush ll, of a variable rheostat H which is connected across the lines L L. The brush 11' is insulatedly connected to the brush 4 to move therewith, so that the potential of the brush ll with respect to the lines L. and I is a function of the voltage impressed upon the lamps I. The primary winding ll of transformer I 4 is connected between the brush I l and the adjustable contact I3 of the lower half I3 of potentiometer [3, while the primary winding [5 of transformer I5 is connected between the adjustable contact ll and the adjustable contact 13 of the upper half of said potentiometer.

The system is shown in the drawing in a transition from one scene setup to another. It may be assumed for purposes of description that the brush H was previously at the bus bar L and that it is now being moved toward the bus bar L The voltages impressed upon the scene master potentiometers l2 and l2 are at all times equal to the voltages of the respective sections H and ll said voltages, as aforeindicated, varying from maximum to minimum, according to the position of brush Il. Furthermore, at any moment the output voltages of the sections I2 and H." are a fraction of the aforementioned input voltages dependent upon the setting of the brushes l2 and I2. These output voltages areimpressed upon the potentiometer sections I3 and l3 whose modified output voltages are in turn impressed upon the primary windings I l and I5 of transformers l4 and I5, respectively. Thus when the brush H is at the bus bar L the value of the voltage impressed upon the transformer I4 is zero, while the value of the voltage adapted to be impressed upon the transformer I 5 is a maximum (namely, the voltage acrossL L whose value is modified by the setting of the contacts 12 and 13 which thus control the brilliancy of the lamps I. That is to say, a voltage is induced in the secondary winding l5 of transformer I5 which causes a flow of current through the coils 8 to operate motor 1 in the proper direction until the voltage between brush li and line L equals in polarity and magnitude the induced secondary voltage, at which point the motor 1 stops and the lamps operate at the desired intensity. The aforedescribed arrangement or circuit connection of secondary windings N and I 5 is such that the voltages induced therein when the contact H is man intermediate position are opposed to each other, thus providing a diiferential voltage value. Moreover, the relative values of the opposed voltages last mentioned will be additionally dependent upon the respective positions of contacts 12 and I3 and contacts l2 and [3 If it should be desired to change the illumination intensity of a single group of lamps it is only necessary to change the adjustment of the brush l3 or l3 associated with the respective group of lamps, whereas the illumination intensities of all of the groups of lamps may be modified jointly and proportionally by adjustment of the brush 12 or 12, depending upon the extreme position or polarity of the contact Il.

If it is desired to preset for a third or other succeeding scene while contact H is at the bus bar L it is only necessary to adjust the contacts 12 and I3 to the desired value, and when it is desired to change to the new set-up, contact H is moved from L to I. with the result that the intensities of all lamp groups are changed from the respective previous values to the new values gradually and proportionally relatively to each other. In any intermediate position of the contact H the effect 01 the adjustments of the scene masters and group scene potentiometers will be proportional to the settings of the various adjustable contacts as will be obvious.

When the desired values 0'! the respective lamp circuit voltages have been attained for a given scene no current flows in the circuits of the relay coils I associated with the respective lamp circuits between the several receiving and sending stations and the various control circuits which provided the particular intensities might; therefore be opened if desired.

What I claim as new and desire to secure by Letters Patent is:

1. A control system comprising, a circuit to be controlled, means for. presetting a plurality of operating values for an electrical condition or said circuit, comprising, a pair of fixed ratio transformers having primary and secondary windings, said secondary windings being connected in series relation to each other and having output voltages opposed to each other, an individual voltage regulator for each of said primary windings, affording a variable ratio between its input voltage and its output voltage, the input circuits of said voltage regulators being connecting in series acros a voltage source and a potentiometer having an adjustable contact for varying the potential thereof relative to the potential of its end terminals and connected to the common point of said individual voltage regulators, whereby the voltage of one of said latter regulators is increased and the voltage of the other is simultaneously decreased.

2. An illumination contro1 system comprising u a circuit to be controlled, means for presetting a plurality of operating values for an electrical condition of said circuit, comprising, a pair of voltage regulators, means individual to each of said regulators for varying the output voltage thereof and impressing it upon said circuit, a second pair of voltage regulators, one for each of said first pair of voltage regulators and also ailording a. variable ratio of their input and output voltages and adapted to cooperate with the respective voltage regulator of the first pair to impress their respective output voltages thereon, and means to increase the input voltage of one and to simultaneously decrease the input voltage of the other of said second pair of voltage regulators.

3. A control system comprising, a circuit to be controlled, means for presetting a plurality of operating values for an electrical condition of said circuit, comprising, a pair of transformers having primary and secondary windings, said secondary .windings being connected in series relation to each other and having output voltages opposed to each other, a voltage regulator for each of said primary windings affording a variable ratio between its input voltage and its output voltage, and adapted to impress the latter upon the respective primary winding, and means for increasing the input voltage of one and si multaneously decreasing the input voltage of the other or said voltage regulators.

4. A control system comprising a circuit to be controlled, means for presetting a plurality 01 operating values for an electrical condition of said circuit, comprising, a pair of transformers having primary and secondary windings, said secondary windings being connected in series relation to each other and having output voltages opposed to each other, a potentiometer for each of said primary windings, means to vary the output voltage of each of said potentiometers and to impress it upon the respective primary winding, and means for increasing the input voltage of one and simultaneously decreasing the input voltage of the other of said potentiometers.

5. 'A control system comprising a circuit to be controlled, means for presetting a plurality 01' operating values for an electrical condition of said circuit, comprising, a pair oi. transformers having primary and secondary windings, said secondary windings being connected in series relation to each other and having output voltages opposed to each other, a potentiometer for each of said primary windings affording a variable ratio of its input voltage'and its output voltage and impressing it upon the responsive primary winding, .a second pair of variable potentiometers, one for each of said first pair of potentiometers, each of said second pair of potentiometers being adapted to impress its output voltage upon its respectively associated potentiometer of said first pair, and means for increasing the input voltage of at least one of the respectively associated potentiometers of said first and second pairs and simultaneously decreasing the input voltage of at least one of the other respectively associated potentiometers of said first and second pairs.

6. A control system comprising a circuit to be controlled, means for presetting a plurality of operating values for an electrical condition of said circuit, comprising, a pair of transformers having primary and secondary windings, said secondary windings being connected in series relation to each other and having output voltages opposed to each other, a potentiometer for each or said primary windings afiording a variable ratio of its inputvoltage and its output voltage and impressing it upon the respective primary winding, a second pair of variable potentiometers, one for each or said first pair of potentiometers, each of said second pair of potentiometers being adapted to impress its output voltage upon its respectively associated potentiometer of said first pair and means for increasing the input voltage of one ofsaid second pair of potentiometers and simultaneously decreasing the input voltage of the other of said second pair of potentiometers.

JOSEPH J. ROSECKY.

CERTIFICATE GF- CORRECTION. Patent No. 2,252,077. February 18, 191 1.

JOSEPH J. ROSECKY.

It is hereby certified that error appears in the printed specification of the above numbered patent requiring correction as follows: Page 5, first column, line jl, claim 5, for the word "responsive" read -respeot1ve-=-; and that the said Letters Patent shouldbe read with this correction therein that the same may conform to the record of the case in the Patent Office;

signed end sealed this 22nd day of April, A. D. 19m.

Henry Van Arsdale,

( Acting Commissionerof Patents.

CERTIFICATE OF CORRECTION.

Pateht No. 5,252,077. February 1 19m.

JOSEPH J. ROSECKY.

It is hereby certified. that error appears in the printed specification of the above numbered patent requiring correction as follows: Page 5, first column, line 51; claim 5, for the word "responsive" read "respective- 3 and that the said. Letters Patent should be read with this correction there-- in that the same may contain 0 the record of the case in the Patent Office; S1gned end. sealed this 22nd da of April, A. 1). 191m.

Henry Van Arsdale, (Seal) Acting commissionerwof Patents-