US1829603A

US1829603A - Rectifying installation

Info

Publication number: US1829603A
Application number: US234274A
Authority: US
Inventors: Mulder Johannes Gijsbe Wilhelm; Oosterhuis Ekko
Original assignee: Philips Gloeilampenfabrieken NV
Current assignee: Koninklijke Philips NV
Priority date: 1927-01-29
Filing date: 1927-11-18
Publication date: 1931-10-27
Anticipated expiration: 1948-10-27

Description

Oct. 27, 1931. v J. G. w. MULDER ET AL 0 RECTIFYING INSTALLATION Filed Nov. 18, 1927 Patented Oct. 27, 1931 UNITED STATES JOHANNES GIJ'SBERTUS WILHELM MULDER AND EKKO OOSTERHUIS, 0F EINDHOVEN,

NETHERLANDS, ASSIGNORS TO N. V. PHILIPS GLOEILAMPENFABR-IEKEN, OF

EINDHOVEN, NETHERLANDS, A LIMITED LIABILITY COMPANY OF THE NETHER- LANDS RECTIFYING INSTALLATION Application filed November 18, 1927, Serial No. 234,274, and in. Belgium January 29, 1927.

This invention refers to an alternating current rectifying installation adapted for full-wave rectification. According to the invention such a rectifier has in addition to 5 output terminals for full-wave supply at least one separate output terminal for halfwave supply. The output voltage in the latter case is higher than in the case of full-wave supply.

The rectifier of the kind referred to may comprise a supply transformer having two series connected secondary windings, the free ends of which are each connected to an anode of a rectifier. According to the invention such a rectifier may be provided by at least two output terminals of the same polarity, one of said output terminals being connected to the intermediate connection of the secondary windings and the other to one of the said connections leading to the anodes. In order to simplify the change of connections the said terminals of the same polarity may be connected to a common plug socket.

The invention will be more clearly understood by reference to the accompanying drawings, in which:

Fig. 1 shows, by way of example, a circuit diagram of an installation according to the invention, and

Fig. 2 is a plug socket which contains the two negative leads.

Referring to Fig. 1, the reference numeral 1 designates the primary of a transformer adapted to be connected to an alternating current supply. 2 and 3 are the secondary coils of the said transformer and 4. is the coil which supplies the heating current to the cathode 10 of the valve rectifier 7. The secondary coils 2 and 3 are connected to each other and to a negative direct current terminal 11 across ballast resistances 5 and 6, the free ends of the said coils are connected to the anodes 8 and 9 of the rectifier, the free end of the secondary 3 also being connected to a separate negative output terminal 12 whereas the middle point of the coil 1 is connected to the positive direct current terminal 13. Of course instead of the free end of the secondary coil 3 the free end of the coil 2 and therewith the anode 8 might be connected with the terminal 12. It is also possible to connect this free end with a separated terminal (not shown in the figure). The connection of the battery B with this terminal may be obtained by a switch or in another manner. In Fig. 1 this connection is obtained by providing the

terminals

11 and 12 with a plug socket. This plug socket is shown apart in Fig. 2. With the negative terminal of the battery is connected a plug which may be put either in the

plughole

11 or 15. If, in the example shown, the battery B is to be charged by the use of both half waves of the alternating current, the plug is put into the hole 14.- and the current will fiow for alternate half waves as follows :starting from the positive terminal 13, through the battery B to be charged, across terminal 11, through ballast resistance 5, through coil 2, to anode 8, thence to cathode 10 and finally I to the point of issue, i. e. the positive terminal 13. During the other half-waves the charging current flows as follows Positive terminal 123, battery B, negative terminal 11, ballast resistance 6, coil 3, anode 9, cathode 10 to the positive terminal 13. If a higher charging voltage than is obtainable with full wave rectification is desired, only one half-cycle of the alternating supply current will be used and half-wave rectification will be employed. For this purpose the negative pole of the battery is connected to terminal 12, the charging current flowing as follows: starting from positive terminal 13, through battery B, negative terminal 12, through coil 3 and variable resistances 6 and 5, through coil 2, to anode 8, cathode 10 and back to the positive terminal 13. The plug socket may be provided with signs to prevent choosing the erroneous connection for the determined charge-conditions.

WVhat we claim is p 1. An alternating current rectifying installation, adapted for full wave rectification, comprising a supply transformer having primary and secondary windings, the secondary winding being split into two sections and having an intermediate connection, a direct current load, having positive and negative terminals, a rectifier valve, having at least two anodes and a cathode each anode being connected to a separate free end of the said secondary Winding, and the cathode being connected to the positive terminal for the said load, the negative terminal of the said load being connected to the said intermediate connection, and a second negative terminal for the said load adapted for connection to a free end of one of the said secondary transformer windings sections.

2. [in alternating current rectifying installation adapted for full wave rectification, comprising a supply transformer having primary and secondary windings, the secondary windino' bein split into two parts and having an intermediate connection, a direct current load having a positive and a negative terminal, a rectifier valve, having at least two les and a cathode, each anode of the said connected to a separate free he said secondary Winding, and the being connected to the positive terend or t cathode road being connected to the said e connection of the said secondary i-iding, a second negative terminal for the said lead adapted for connection to a free end of one of the secondary transformer windings and a plug socket common to the said ne ative terminals for connection of the direct Lull'GIll; load to the rectifying installation.

in alternating current rectifying installatie comprising a full-wave thermionic rectifying device, a source of alternating current supply therefor, leads extending from oppc sides of the source to the respective anodes, a connection from the cathode to the load and means on the other side of the load to selectively connect it to one point on the source for full-Wave rectification and on another point for half-Wave rectification at higher voltage than at full-Wave rectification.

in testimony whereof We afiir; our signaat the city of Eindhoven, this 29th day ct oer, 1927.

OE-lANliES GEJSBERTUS WILHELM MULDER.

' UUSTERHUIS.