FR495606A - Improvements to electrical transformers to adjust or vary the voltage of the current they deliver - Google Patents

Improvements to electrical transformers to adjust or vary the voltage of the current they deliver

Info

Publication number: FR495606A
Authority: FR; France
Prior art keywords: deliver; vary; adjust; voltage; current
Prior art date: 1918-01-04
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.): Expired

Application number

FR495606A

Other languages

French (fr)

Inventor

Frederick Edmund Berry

Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)

Individual

Original Assignee

Individual

Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)

1918-01-04

Filing date

1919-02-07

Publication date

1919-10-14

1919-02-07 Application filed by Individual filed Critical Individual

1919-10-14 Application granted granted Critical

1919-10-14 Publication of FR495606A publication Critical patent/FR495606A/en

Status Expired legal-status Critical Current

Classifications

- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01F—MAGNETS; INDUCTANCES; TRANSFORMERS; SELECTION OF MATERIALS FOR THEIR MAGNETIC PROPERTIES
- H01F29/00—Variable transformers or inductances not covered by group H01F21/00
- H01F29/02—Variable transformers or inductances not covered by group H01F21/00 with tappings on coil or winding; with provision for rearrangement or interconnection of windings

Landscapes

Engineering & Computer Science (AREA)
Power Engineering (AREA)
Regulation Of General Use Transformers (AREA)
Coils Of Transformers For General Uses (AREA)

FR495606A 1918-01-04 1919-02-07 Improvements to electrical transformers to adjust or vary the voltage of the current they deliver Expired FR495606A (en)

Applications Claiming Priority (1)

Application Number	Priority Date	Filing Date	Title
GB133339T		1918-01-04

Publications (1)

Publication Number	Publication Date
FR495606A true FR495606A (en)	1919-10-14

Family

ID=23023312

Family Applications (1)

Application Number	Title	Priority Date	Filing Date
FR495606A Expired FR495606A (en)	1918-01-04	1919-02-07	Improvements to electrical transformers to adjust or vary the voltage of the current they deliver

Country Status (4)

Country	Link
US (1)	US1422653A (en)
FR (1)	FR495606A (en)
GB (1)	GB133339A (en)
NL (1)	NL5666C (en)

Families Citing this family (6)

* Cited by examiner, † Cited by third party
Publication number	Priority date	Publication date	Assignee	Title
US2727205A (en) *	1953-02-05	1955-12-13	Robert W Annis	Variable voltage transformers
US2832036A (en) *	1955-07-26	1958-04-22	Gertsch Products Inc	Precision selective-ratio transformers
US3239749A (en) *	1964-07-06	1966-03-08	Gen Electric	Transformer system
US3268842A (en) *	1964-10-05	1966-08-23	Glenn Pacific Corp	Continuously variable voltage low impedance transformer assembly
US3512086A (en) *	1967-02-15	1970-05-12	Singer Co	Ac voltage measuring system utilizing variable ratio transformer
US4405894A (en) *	1981-10-21	1983-09-20	Reynolds Metals Company	Voltage control and balancing circuit

0
- GB GB133339D patent/GB133339A/en active Active
- NL NL5666D patent/NL5666C/xx active
1918
- 1918-12-27 US US268506A patent/US1422653A/en not_active Expired - Lifetime
1919
- 1919-02-07 FR FR495606A patent/FR495606A/en not_active Expired

Also Published As

Publication number	Publication date
NL5666C (en)
US1422653A (en)	1922-07-11
GB133339A (en)

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