US2564279A - Vibrator system for supplying a plurality of direct currents with different voltages - Google Patents

Description

SUPPLYING A PLURALITY OF DIRECT CURRENTS WITH DIFFERENT VOLTAGES Filed Aprll 22, 1948 H. B. REYNOLDS Inventor Harold B. Reynolds VIBRATOR SYSTEM FOR Aug. 14, 1951 connections with the transformer.

Patented Aug. 14, 1951 VIBRATOR SYSTEM FOR SUPPLYING A PLU- -RALITY OF DIRECT CURREN TS WITH DIF- FERENT VOLTAGES Harold B. Reynolds, Oneida, N. Y. Application April 22, 1948, Serial No. 22,615

Claims.

This invention relates to power supply systems for supplying D. C. currents, and it has more particularly reference to vibrator systems in which low voltage D. C. currents are converted into D. C. currents of higher voltage.

The invention has for its main object to provide a power supply system of the above type in which D. C. currents with at least two different voltages may be supplied by a single vibrator system either simultaneously or alternatively.

A further object of the invention consists in a vibrator system in which the polarity of the D. C. currents furnished at the desired voltage may be selected according to requirements.

An object of the invention consists of a vibrator system furnishing output currents under at least two different voltages which is simple and effective and which is adjustable over a wide range so that the voltages of the D. C. currents furnished by the system may be selected in accord .ance with the requirements of a particular case.

Further objects of the invention will be apparent from the detailed specification.

The invention is illustrated in the accompanying drawing showing one embodiment by way of example and one modification thereof. This example is intended to explain the principle of the invention and the best mode of applying this principle, and this explanation will supply the expert skilled in the art with the information required to apply the principle to other cases. Further applications and modifications are therefore not necessarily departures from the invention.

In the drawing:

Figure 1 is a diagram of a vibrator system for converting low voltage D. C. currents into D. C. currents of higher voltage.

Figure 2 is a diagram of part of the system, illustrated in Figure 1 showing a connection for I reversed polarity of the converted high voltage D. C. current.

According to the prior art the problem of con verting a D. C. current of low voltage into a high voltage D. C. current has been solved by means of an electromagnetic vibrator, including a vibrator reed, operated by an electromagnet coil, which cooperates with stationary contacts mounted on opposite sides of the reed, and with a transformer and a rectifier. Various constructions show marked differences with respect to the number of stationary contacts with which the vibrator reed cooperates and with respect to their One of the best known arrangements of this type uses two pairs of contacts, one of which is connected with the ends of the primary of the transformer, the center point of which is connected with the low voltage source of current, while the ends of the secondary coil and its center are connected to the anodes and to the cathode of a full wave rectifier respectively.

The second contact pair of the vibrator reed controls the vibrator electromagnet.

This arrangement, especially when provided with inductance coils and condensers for smoothing out the ripples of the converted D. C. current, has been widely used, but it is clear that it can only furnish a single converted D. C. voltage and, as a rule, it only furnishes a current of one polarity.

The main feature of the invention consists in an improved arrangement of the above described type, from which at least two high D. C. voltages may be derived which may have any desired polarity. The use of more than one high D. C. voltage has many advantages which will be obvious, as the various apparatus operating at a medium voltage for instance, can now only be operated with resistances annihilating a large part of the energy and producing heat, which processes are both objectionable in many cases, for instance in the case of a car.

According to the invention, as will be seen in Figure 1, the vibrator 5 consists of an electromagnet coil 6 and a vibrator reed I cooperating with a pair of fixed contacts 8, 9 and with a further pair H], H. The vibrator reed 7 is grounded at I2. The fixed contacts 8, 9 are connected by means of leads 2!], 2| with the ends of the primary l5 of a transformer 1 the center point !6 of which is connected with the low voltage battery I! grounded at I 8. In the case of a car, for instance, the ground l2, I8 is replaced by a connection with the chassis.

The circuit 20, 2| including the primary has a branch 22 which contains the vibrator coil 6 and which leads to the grounded end of the vibrator reed 1.

When the reed l is attracted by the coil 6 one half of the primary is energized by the contact of l with contact 8 the current flowing (when the positive pole of the battery is grounded) from ground [2 over reed 1 and conductor 28 to point I 6 and battery l1. When the reed swings back, the current flows from I 2 to 9 and over 2| to point I6 and battery IT. The current impulses therefore flow in opposite directions through primary [5.

The secondary 24 of the transformer I4 is provided with adjustable end connections 25, 28 which, by means of conductors 31, 38 respectively, are connected with the anodes 32, 33 of the full Wave rectifier 3!, the cathode 34 of which is connected with the high tension lead 49 from which the high tension D. C. may be taken off, or which contains the grounded" apparatus to be provided with high tension current. Moreover the center point 30 of coil 24 is provided with a similar high tension lead 36, which may be connected withanother type of apparatus.

A condenser M may bridge the coil 26 as usual.

The vibrator contacts I0, H are connected with adjustable intermediate points 26, 21 of the secondary 24. A heating circuit 39 is provided for heating the cathode 34 of the rectifier, if necessary.

' The load devices or apparatus (not shown) which have to be supplied with different voltages are connected with the conductors 40 and 36 respectively. Considering for instance the load device fed by the D. C. voltage which has been rectified in the diode rectifier 3| it will be seen .that itis provided with its high voltage current in the following manner.

With the reed I in the position shown in the drawing a current flows from ground 12 connected with the reed over contact '8 and conductor 26 through'the portion of the coil which is uppermost in the drawing to central point '[6 and from there to the battery I! and to ground l8. 'With the current flowing through coil 15in the direction of the upper arrow in the figure shown alongside the primary coil [5, the current flow induced in the secondary coil 2 will'bein 'the direction of the upper arrow alongside said secondary ,coil in the figure and therefore -.a current will (flow from the ground over-the'load device inline 4!) through the plate 323 to conductor 31 .to connection point .25 of thesecondarycoilfl and through the secondary coil between the connection points 25 and .21, through conductor 29, through contact 16 and reed to ground l2. The voltage of this current is clearly proportional to the number of turns through which the induced currentpassed which, in this case, is .the number of turns between theconnection points .2 5 and 21.

The coil 6 'whichoriginally attracted the reed and .moved it to the position shown in the drawings has been short circuitedby the connection between the ground l2 and the contact :8 and-therefore the .reed now swings back.

When thereed comes .intocontact with contactsSand H the current through the primary coil l5 fiows from ground I2 over contact 9 conductor 2i and over the lowermost portion of coil lite-point l6 andto battery I! and ground 1.8. The current flow through the primary coil therefore occurs in a direction which is indicatedby the lower arrow alongside of primary coil l5. When the current through the primary coil fiows in this direction theinduced current in the secondary coil will be in the direction of the lower arrow alongside secondary coil 24 and therefore the current will flow from ground over the load device apparatus in line All and through plate 32, conductor .38, connection point 28 of the secondary coil .24 through the secondary coil formed between the connection points 28 and 26and from-connection point 26 through conductor 35 to contact :1! which is .now inoperative-contact with the reed land through the .reed l to ground 12. Again the voltage of this current is proportional to the number of turns between the connection points 23 and 2 5 which in thiszcase is equal to the number ,of turns between .the points 25 and 21.

If a grounded load device or apparatus is now considered whichisconnected with .line 36 and if the vibrator read .again .assumed .to :swing 1130 the left the wurrentfinduced in :coil :24 flows and from there to point 26 and to contact H and to the reed. The number of secondary turns included in the circuit is now smaller and the voltage of the current will be smaller. The conductor 36 has in this case a negative polarity.

If thepolarity of the output or delivery end All is to be reversed the rectifier may be connected in the manner shown in Figure 2. In this case, for instance, when the reed T has again "moved towards the left, current will flow from ground I2 over contact 10 lead 29, point 21 to the end 28, lead 38 and the cathode 34a. The voltage is in this case determined by the number of turns between?! and 28 and the polarity of the current flowing through lead 40 to the apparatus is reversed.

It will be clear that the magnitude of the voltage will be determined by the adjustment of the tapping points 25, 26, 21, 28 on the transformer coil. The polarity of 66 in the example shown infFigure 2 may also be negative, if desired. Upon a movement of reed i to the left induced current will flow, from 36 to '30 to '21 and over 26 to Hi and to ground. Upon tools with ,so-called vibrating motors, etc.

.It will be clear that the specific-features men- .ticned in the abovedescription may be changed or replaced by others and that other ,unessential changes .may be made without affecting the invention.

Having described the claimed as new is: I

1.. .A vibrating systemiorconverting.D. C. currents into D. C. currents of a .difierent voltage, comprising a source .of D. C. currents, a vibrator with a vibrating reed connected with .thesource of current and two pairs ofstationary vibrator contacts cooperating with said reed, a transinvention, what is .former with .a primary and secondary winding, .the former-being connected with the firstpair of contacts and with the source of currents, a full wave rectifier :unit, provided .with a central electrode andtwo half waverectifying electrodes,

, a secondary .coil, tapped at .the. center and provided with two pairsof connections, :said .pairs of .connectionsbeing located on oppositesidesof the central tapping point, each pair of connections-leading .to-oneof the twohalf wave rectifyingelcctrcdesof the rectifier unit, and .toione -contact.of thesecondpair of stationary vibrator contacts respectively, and .two D. .C.. output :lines, one connected with said central tapping point of the eseeondarycoil and the --other connected with the central eelectrode of the rectifier unit, the currents induced in the secondary .coil .flow- .in-g overone portionof thecoil .connected with -.-cne.-.half wave rectifying electrode .on .one side --and=with the contact ofthe second vibrator contact pairjn-contact with the reed .for the time being on the other side, the current flowing through the conductor connected with the central tapping .point passing through a portion of the coil connected with the center tapping point and the point of connection with one of the vibrator contacts of the second pair of contacts, thus producing a unidirectional flow of current having a D. C. voltage differing from the voltage produced in the output line connected with the rectifier unit.

2. A vibrating system for converting D. C. currents into D. C. currents of a difierent voltage, comprising a source of D. C. currents, a vibrator with a vibrating reed connected with said source of current and two pairs of stationary vibrator contacts, cooperating with said reed, a transformer with a primary and secondary winding, the former being connected with its ends with the first pair of contacts and with its center with the source of currents, a secondary coil with a central tapping point and with two adjustable connections at each side of said central tapping point, an output circuit for converted high voltage D. 0., connected with the central tapping point, said output circuit being supplied with D. C. over a portion of the secondary coil, enclosed between the central tapping point and between one of the two connections on both sides of the central tapping point connected with one of the stationary vibrator contacts of the second contact pair, and a second output circuit simultaneously supplied with a high voltage differing from that of the first named output circuit, said output circuit including a full wave rectifier unit with a central electrode and two half wave rectifyin electrodes, and further in cluding a portion of the secondary coil, contained between the connection of said coil and one-half wave electrode of the rectifier on one side of the center tapping point and the connection of the coil with the vibrator contact of the second pair of stationary vibrator contacts located on the other side of the center tapping point.

3. A vibrator system for converting D. C. currents into similar currents of different voltage, comprising a source of D. C. currents, a vibrator with a vibrating member and with fixed vibrator contacts, a transformer having a primary and a secondary winding, means including a pair of fixed vibrator contacts for interrupting the current flowing through the primary coil, a central connection with the secondary coil means for producing a converted D. C. voltage, said means including connections of the secondary coil on opposite sides of said central connection with a pair of fixed vibrator contacts, and means for producing a further D. C. voltage differing from the first named voltage, including a full wave rectifier and connections of the same with the secondary coil on both sides of the central tapping contacts.

4. A vibrator system for converting D. C. currents into similar currents of difierent voltage, comprising a source of D. C. currents, a vibrator with a vibrating member, a transformer having a centrally tapped primary and a secondary winding, a first pair of fixed vibrator contacts for interrupting and controlling the current fiow through the primary coil, a plurality of connections of the secondary coil with outer circuits on either side of said central tapping point, one connection on either side of said central tapping point leading to one fixed contact of a second pair of vibrator contacts, cooperating with the vibrator member and alternatively making contact with the same, a further connection on each side made at a difierent point, a rectifying means connected with the aforesaid further connection and with an output line, the current to be rectified flowing through a portion of the coil contained between its connection with the rectifying means and one of the connections with a contact of the second pair of stationary vibrator contacts, the voltage of said current being proportional to the portion of the coil included, a further output circuit connected with said central tapping point, said output circuit carrying currents rectified by the vibrator member and the second pair of stationary vibrator contacts, said current flowing alternatively through a portion of the coil contained between the central tapping point and the fixed contacts of the second pair of vibrator contacts.

5. A vibrator system for converting D. C. currents of low voltage into currents of different voltage comprising a source of D. C. currents, a vibrator with a vibrating member connected with said source of current, a transformer having a primary and a secondary winding, means including a first pair of fixed vibrator contacts for interrupting the current and controlling the direction of current fiow through the primary coil, two output circuits for converted D. C. currents, one of said circuits being connected with a central tapping point of the secondary coil and the other with the ends of the secondary coil, the latter connections including a rectifying unit with two electrodes, each electrode being connected with one end of the coil, a second pair of vibrator contacts on both sides of the vibratil'lg member, the contacts of said second pair of vibrator contacts being connected with further points of connection on the secondary coil, arranged on both sides of the central tapping point of said coil, the output circuit including the rectifying unit having two alternatively active branches, each branch including one connection between an electrode of the rectifier unit and the secondary coil and a connection of the said coil with one of the contacts of the second pair of stationary vibrator contacts and a portion of the coil between the said connection point, thus producing a D. C. voltage proportional to the number of turns of the enclosed portion of the coil, and a second output circuit connected with the center point of the secondary coil being simultaneously completed by connections with the contacts of the second pair of vibrator contacts and the portion of the coil enclosed between the center tapping point of the secondary coil and the points of connection with the second pair of vibrator contacts, the voltage of the rectified current being dependent on the number of turns between said center point and the connection point which is independent of the number of turns included in the output circuit containing the rectifier unit.

HAROLD B. REYNOLDS.

REFERENCES CITED The following references are of record in the file of this patent:

UNITED STATES PATENTS Number Name Date Re. 20,728 Garstang May 17, 1938 2,211,073 Pressley Aug. 13, 1940 2,232,010 Musser Feb. 18, 1941 2,306,003 Sullivan et al Dec. 22, 1942

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