Ray collimating extension tube posi- tioning ring for anterior type dental x-ray film holders
US D237115 S
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Description (OCR text may contain errors)
United States Patent Des. 237,115 Patented Oct. 7, 1975 X-RAY COLLIMATING EXTENSION TUBE POSI- TIONING RING FOR ANTERIOR TYPE DENTAL X-RAY FILM HOLDERS Charles F. Stevenson, Elgin, 111., assignor to Rinn Corporation, Elgin, Ill.
Filed Apr. 18, 1974, Ser. No. 461,952
Term of patent 14 years Int. Cl. D24-01 US. Cl. D83-1 H FIG. 1 is a perspective view of one side of an X-ray collimating extension tube positioning ring for anterior type dental X-ray film holders, showing my new design;
FIG. 2 is a plan view of the positioning ring side shown in FIG. 1;
FIG. 3 is a plan view of the positioning ring side 0pposite that shown in FIG. 2;
FIG. 4 is an edge view of the positioning ring taken substantially along line 4-4 of FIG. 2;
FIG. 5 is an edge elevational view of the positioning ring taken substantially along line 5-5 of FIG. 2;
FIG. 6 is a fragmental plan view taken substantially along line 66 of FIG. 1; and
FIG. 7 is a tragmental sectional view taken substantially along line 7--7 of FIG. 2.
I claim: The ornamental design for an X-ray collimating extension tube positioning ring for anterior type dental X-ray film holders, substantially as shown.
References Cited UNITED STATES PATENTS BERNARD ANSHER, Primary Examiner