US1457851A

US1457851A - Voltage regulator

Info

Publication number: US1457851A
Application number: US495992A
Authority: US
Inventors: Arthur F Nesbit
Original assignee: Individual
Current assignee: Individual
Priority date: 1921-08-27
Filing date: 1921-08-27
Publication date: 1923-06-05
Anticipated expiration: 1940-06-05

Description

June 5, 1923.

A. F. NESBT VOLTAGE REGULATOR Filed Aug. 2v, 1921 fo e@ M M i I m P 1 ,WV

Patented ,June 5, 1923-.

UNITEDM STATES PMATENT oFFlcE.

VOLTAGE REGULATOR.

Application led August 27, 1921. Serial No. 495,992.

To' all whom it may concem.'

Be it known that I, ARTHUR F. Nnsrr, a citizen of the United States, and resident of Wilkinsbur'g, in the county of Allegheny and State of Pennsylvania, have invented certain new and useful Improvements in Voltage Regulators, of which the following is a specification.

This invention relates to Voltage regulators and'more particularly to regulators for .controlling the voltage of power circuits, and.v has for its object the provision of such a regulator that will have@ no moving parts, and, therefore, will eliminate the making of adjustments as is necessary with the regulators now in use.

Another object is to provide a voltage regulator that will operate without opening or shutting any vparts of the circuits of which it is a part. f

A further object is to provide a voltage regulator having resistance elements which will'operate only through a varying of their conductivity, 'due to varying temperatures.

The operation, construction and arrangement of parts of the invention are. fully described in the following specification, 'and illustrated in the accompanying drawings, in whichy Figure 1 is a sectional elevation throughl la regulator constructed in accordance with connected therewith for regulating the 'output of said generator.

Figure 3 1s an alternating current generator wiring diagram showing a regulator constructed in accordance with this invention connected therewith for regulating thev .output of said generator.

Referring particularly to the drawings, the numeral 2 designates the hollow 'body of the regulator which may be in the form of a vacuum tube or nitrogen tube. The

, body portion 2, which maygbe made of glass,

porcelain, or the like, has an open bottom which is closed by a cement base or plug 3, and has leadsit and 4 secured therein.

. l*The-,upper face of the plug 3 is formed dishedor concave and" has a surrounding rim 5 on which is mounted a disk-like sup porting base 6. The disk-like base 6 is provided with `a central aperture which has its upper portion enlarged to form an annular shoulder 7. A comparatively thin tubular tion of its depth to form a shoulder 10 is' l mounted on the upper end of the tubular support 8, and has its Vside edges abutting the inner surface of said body, and serves to support and hold the upper end of saidI support rigid.

Suitable metal resistance strips 11 and 11a are secured to the leads 4 and Jlrespectively. The strip 1l has itsu ends Secured to the leads 4 and is wound spirally around the interior surface of the tubular support 8 and secured to or looped around a but# vton A12 adjacent the top of said tube. The f strip 11a has its ends secured to 'the leads 4a and is wound sp-irally around the outer surface of the tubular support 8 and secured to or looped around a button 13 adjacent the top of said tube. The oonvolutions of the strips 11 and 11a follow a parallel course along the support 8 so that the outer strip 11a overlies the inner strip.

In the operation of the regulator the temperature of the resistance strips which are connected in different circuits will vary, and the rise or fall of temperature of, one strip will be transmitted through the'thin wall of the tubular support 8 to the other strip', and

vsince the conductivity or resistance quality ofk the strips vary with their temperature,

ythe current value of oney circuit will control In Figure 2'the numeral 15 designates the armature of a 'direct current generator which has a field 16 connected across the terminals 17V and 18 by wires 16 and 16" to provide'an exciting circuit. A rheostat 19 is in circuit with the wire16h from the terminal 17, and the resistance strip 11a isA in circuit with the wire 16al from the terminal 18. It will be noted, however, that the rheostat 19, after being set to a specific load, is locked in position and all variation 'in the load is controlled by the regulator X,

constructed in accordance to .this invention. The current output or lead circuit from the generator passes from the terminals 17 and 18 through wires 20 and 21 to the lamps 22 or other load, and the resistance strip 11 its resistance quality or decrease its conductivity, so as to decrease the value of thev eld exciting current.

In Figure 3 the regulator X is shown for controlling an alternating current generator having the armature 24 and lield 25.

y The field 25 isexcited from a direct current enerator having armature 26 and eld 27.

`he eld 27 is. connected across the terminals 28 and 29 ofthe armature 26 by Wires 30 and 31.' A rheostat 32 is in circuit with the wire 30 leading from terminal 28 and the resistance strip 11a' is in circuit with the wire 31 leading from the terminal 29. The exciting current to the field 25 of the alternating current generator, passes from the terminals 28 and 29 through wires 33 and 34. The load current passes from the

terminals

35 and 36 of the alternating current generator through wires 37 and 38 to the lamps 39 or other load, and .the resistance strip 11 of the regulator X is connected in circuit with the wire 38 so thatas the load is increased the strip 11` will become heated, such heat being transmitted to the resistance strip 11l1 and decreasing its resistance quality or increasing its-conductivity so as to increase the excitf ing current to the field 27 of the direct current generator or exciter. If the load should suddenly drop or decrease, the, reverse acy tion will take place. That is, the resistance strip 11 will cool, thus allowing the strip 11a to cool and increase its resistance quality or decrease its conductivity, so as to decrease the value of thel current to the direct current exciter field 27.

While only one specific embodiment of this invention has been illustrated and described, various modified forms and designs will readily suggest themselves to those skilled in the art, and, therefore, it is to be expressly understood that I do not wish to be limited to that form illustrated and-'described, since various modifications may be made without departing from the spirit of the invention as described in the appended claims.

l claim 1. A voltage regula-tor comprising a hollow air tight body portion, a thin tubular insulating support rigidly mounted in said body portion, a metal resistance strip coiled around the interior surface of said support, a second metal resistance stripv coiled around the outer surface of said tubular support, said strips having their convolutions arranged in a parallel course along said support so that said outer strip overlies said -inner strip, said strips being formed of such metal that their conductivity will vary as'they becomeA heated, and said tubular insulating member being adapted to readily transmit the heat from one strip to the other, leads secured to said strips, and each of said strips being adapted to be connected to separate electrical circuits.

2. A voltage regulator comprising a hollow air tight body portion, a tubular insulating support rigidly 'mounted in said body portion, a metal resistance strip coiled around the interior surface of said support, a second metal resistance strip coiled around the outer surface of said tubular support, said strips having their convolutions arranged in a parallel course along said support so that said outer strip overlies said inner strip, said strips being formed of such metal that their conductivity will vary as they become heated, and said tubular insulating member being adapted to readily transmit the heat from one strip to the other, each of said resistance strips being adapted to be connected to separate electrical circuits. Y, y

3. A voltage regulator comprising a hollow air tight body portion, a tubular insulating support rigidly mounted in said body portion, a metal resistance strip coiled around the interior surface of said support a second strip coiled around the outer surface of said support, leads secured to said resistance strips and extending out- Wardly through, said fbody portion,- each of said resistance strips being adapted to 4. A voltage "regulator comprisinga holi low air tight body portion, an ,insulating support rigidly mounted in said body portion, a metal resistance strip coiled around and secured to the interior surface of said support, a second strip coiled around and securedJ to the outer surface of said supbe connected to separate electricall circuits,

port. leads secured to said resistance strips tions in said circuits, and said strips being and extending outwardly through said body so arranged with relation to each other that portion. each of said resistance strips being the heat from one strip will be transmitted 10 adapted to be connected to separate electo the other strip to vary its conductivity.

trcal circuits, said strips beingr formed of In testimony whereof I have hereunto set such metal that their conductivity Will vary my hand. as they become heated by the current varia- ARTHUR F. NESBIT.