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
GB10045/29A
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.)
Siemens and Halske AG
Original Assignee
Siemens and Halske AG
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.)
Filing date
Publication date
Application filed by Siemens and Halske AGfiledCriticalSiemens and Halske AG
Publication of GB309133ApublicationCriticalpatent/GB309133A/en
H03F3/00—Amplifiers with only discharge tubes or only semiconductor devices as amplifying elements
H03F3/02—Amplifiers with only discharge tubes or only semiconductor devices as amplifying elements with tubes only
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Engineering & Computer Science
(AREA)
Power Engineering
(AREA)
Coils Or Transformers For Communication
(AREA)
Soft Magnetic Materials
(AREA)
Abstract
309,133. Siemens & Halske Akt.- Ges. April 5, 1928, [Convention date]. Transformers. - The inductance of the input transformer . of a thermionic amplifier is maintained when grid current flows or tends to flow by the use of a core material of high magnetic stability or by the series connection of a high resistance W which for altering current is shunted by a condenser C. The core material is preferably a nickel-iron alloy containing 50 per cent nickel. Reference has been directed by the Comptroller to Specifications 266,749, [Class 40 (v), Wireless signalling &c.], and 283,931.