skip to main content
OSTI.GOV title logo U.S. Department of Energy
Office of Scientific and Technical Information

Title: Safety lock for radiography exposure device

Abstract

A safety lock for securing a radiation source in a radiography exposure device is disclosed. The safety lock prevents the inadvertent extension of the radiation source from the exposure device. The exposure devices are used extensively in industry for nondestructive testing of metal materials for defect. Unnecessary exposure of the radiographer or operator occurs not infrequently due to operator's error in believing that the radiation source is secured in the exposure device when, in fact, it is not. The present invention solves this problem of unnecessary exposure by releasingly trapping the radiation source in the shield of the radiography exposure device each time the source is retracted therein so that it is not inadvertently extended therefrom without the operator resetting the safety lock, thereby releasing the radiation source. Further, the safety lock includes an indicator which indicates when the source is trapped in the exposure device and also when it is untrapped. The safety lock is so designed that it does not prevent the return of the source to the trapped, shielded position in the exposure device. Further the safety lock includes a key means for locking the radiation source in the trapped position. The key means cannot be actuatedmore » until said radiation source is in said trapped position to further insure the safety lock cannot be inadvertently locked with the source untrapped and thus still extendable from the exposure device.« less

Inventors:
Publication Date:
OSTI Identifier:
5286048
Patent Number(s):
US 4314157
Application Number:
TRN: 82-013861
Assignee:
Industrial Nuclear Co Inc
Resource Type:
Patent
Resource Relation:
Patent File Date: Filed date 21 Jun 1979; Other Information: PAT-APPL-050612
Country of Publication:
United States
Language:
English
Subject:
46 INSTRUMENTATION RELATED TO NUCLEAR SCIENCE AND TECHNOLOGY; 42 ENGINEERING; INDUSTRIAL RADIOGRAPHY; RADIATION PROTECTION; DESIGN; METALS; SAFETY ENGINEERING; SHIELDS; ELEMENTS; ENGINEERING; 440105* - Radiation Instrumentation- Radiometric Instruments- (-1987); 420600 - Engineering- Safety Engineering- (-1987)

Citation Formats

Gaines, T M. Safety lock for radiography exposure device. United States: N. p., 1982. Web.
Gaines, T M. Safety lock for radiography exposure device. United States.
Gaines, T M. 1982. "Safety lock for radiography exposure device". United States.
@article{osti_5286048,
title = {Safety lock for radiography exposure device},
author = {Gaines, T M},
abstractNote = {A safety lock for securing a radiation source in a radiography exposure device is disclosed. The safety lock prevents the inadvertent extension of the radiation source from the exposure device. The exposure devices are used extensively in industry for nondestructive testing of metal materials for defect. Unnecessary exposure of the radiographer or operator occurs not infrequently due to operator's error in believing that the radiation source is secured in the exposure device when, in fact, it is not. The present invention solves this problem of unnecessary exposure by releasingly trapping the radiation source in the shield of the radiography exposure device each time the source is retracted therein so that it is not inadvertently extended therefrom without the operator resetting the safety lock, thereby releasing the radiation source. Further, the safety lock includes an indicator which indicates when the source is trapped in the exposure device and also when it is untrapped. The safety lock is so designed that it does not prevent the return of the source to the trapped, shielded position in the exposure device. Further the safety lock includes a key means for locking the radiation source in the trapped position. The key means cannot be actuated until said radiation source is in said trapped position to further insure the safety lock cannot be inadvertently locked with the source untrapped and thus still extendable from the exposure device.},
doi = {},
url = {https://www.osti.gov/biblio/5286048}, journal = {},
number = ,
volume = ,
place = {United States},
year = {Tue Feb 02 00:00:00 EST 1982},
month = {Tue Feb 02 00:00:00 EST 1982}
}