Hand held high power pulsed precision x-ray source
US5077771A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Mar 1, 1989 |
| Grant date | Dec 31, 1991 |
| Priority date | — |
| Expiry date | Mar 1, 2009 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH05G1/34
- WIPO fieldMedical technology
- WIPO sectorInstruments
Abstract
A pulsed precision x-ray source includes a miniaturized internally self-shielding x-ray tube and an integral generator contained in a hand-held housing for generating timed bursts of x-ray having regulated energy level. A control grid and focus electrode within the tube enable precise on-off control of an electron beam directed to an x-ray emitting anode. The integral generator system includes an elongated, U-shaped unitary, molded plastic block mounted in the housing and includes a high voltage transformer having primary and secondary annular windings encased in a transformer portion of the block defining a central opening outside of the block for receiving a transformer core therethrough and, a capacitor-diode voltage multiplier stack connected to the secondary winding and having a positive node connectable to the anode and a negative node connectable to the cathode. A high voltage pulse width modulated switching circuit is connected to the primary annular winding to generate high voltages across said voltage multipler stack in order to control the energy of x-ray put out by the tube. A heater power supply supplies heater current to operate a heater in the tube. A focus element/g…
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.