Coolidge X-Ray Tube (Classic Reprint) - Couverture souple

General Electric X.-Ray Corporation

Couverture souple

ISBN 10 : 1330603761 ISBN 13 : 9781330603765

Editeur : Forgotten Books, 2018

Synopsis

Explore the Coolidge X-Ray Tube: reliable power, precise control, and proven design for radiography and therapy.

The book explains how the filament can be heated either by a storage battery or a transformer. It covers how to choose a heating method based on the available electrical supply and how to monitor filament current for stable, repeatable results.

It guides operation with different high‑tension sources and discusses how to control output. The text compares resistance and auto‑transformer controls and recommends using an auto‑transformer for diagnostic work, with a circuit breaker on the primary side for safety.

• Heating options for the cathode: storage battery or transformer, with notes on voltage, current, and stability.
• High‑voltage power sources and rectification: static machines, induction coils, or transformers, plus guidance on rectified versus unrectified current.
• Tube capacity and focal spots: fine, medium, and broad focus, plus current and energy limits to protect the tube and ensure image quality.
• Radiator versus universal designs: how heat is managed, target cooling, and suitability for different radiographic tasks, including dental work.

Ideal for readers of historical medical physics or engineers seeking practical, era‑specific radiography guidance.

A propos du livre

Présentation de l'éditeur

Excerpt from Coolidge X-Ray Tube, Vol. 1

The cathode filament may be heated by means of a storage battery or a small transformer. The battery is universally applicable. The transformer may be used wherever there is alternating current available, either from the supply mains or from a synchronous converter. The filament current transformer is not to be recommended for radiographic work where there is much line drop or fluctuation in the current supply.

The transformer is generally used wherever alternating current is available. This transformer should have a low tension output of 10 to 12 volts and not over 5 amperes. It should be capable of finely graduated control by means of either a resistance or variable inductance device. As the low tension side of this transformer will be brought to the full potential of the tube, it is important that it be thoroughly insulated from the high tension side, the ground and the patient.

The storage battery may be used where there is no source of alternating current or where on account of fluctuation of voltage and line drop, the use of a transformer is unsatisfactory.

The storage battery should be a 5- or 6-cell (10- or 12-volt) 40-ampere-hour battery, and arrangements should be made so that the battery may be connected during the night to the charging circuit. Before using the tube for the first time each day, the filament circuit should be dosed for a few minutes. This allows the battery to reach a stable condition and so eliminates fluctuations in the filament current. (A fully charged storage battery shows 2.5 volts per cell, dropping rapidly to a stable point of 2 volts.) It is inadvisable to charge the battery at frequent intervals during the day owing to the trouble from instability in voltage referred to above.

If battery leads other than those furnished with the tube are used they should not be of greater resistance than these. Leads of too great length will add enough resistance to t...

Détails de l'édition

• Éditeur: Forgotten Books
• Date d'édition: 2018
• Langue: anglais
• ISBN 10: 1330603761
• ISBN 13: 9781330603765
• Reliure: Broché
• Nombre de pages: 28
• Coordonnées du fabricant: Copytech (UK) Ltd, Trading as Printondemand-worldwide.com; gpsr@podww.com; ; 9 Culley Court; Orton Southgate; Peterborough; Cambridgeshire; PE2 6WA; Royaume-Uni
• Personne responsable: Easy Access System Europe Oü, 16879218; +358405003575; gpsr.requests@easproject.com; ; Mustamäe tee 50; Tallinn; 10621; Estonie