U.S. patent number 3,569,713 [Application Number 04/796,726] was granted by the patent office on 1971-03-09 for thyroid gland x-ray protector.
Invention is credited to William F. Via, Jr..
United States Patent |
3,569,713 |
Via, Jr. |
March 9, 1971 |
THYROID GLAND X-RAY PROTECTOR
Abstract
The X-ray protector for the thyroid gland is in the form of a
shield which covers the forward portion of the neck over and above
the larynx for shielding the thyroid gland from primary and
secondary rays from an X-ray machine. The material of the shield is
formed from sandwiched layers of vinyl or other plastic, with a
leaded layer therebetween.
Inventors: |
Via, Jr.; William F. (Hartford,
CT) |
Family
ID: |
25168903 |
Appl.
No.: |
04/796,726 |
Filed: |
February 5, 1969 |
Current U.S.
Class: |
250/516.1;
976/DIG.336; 2/468 |
Current CPC
Class: |
A61B
6/107 (20130101); G21F 3/02 (20130101) |
Current International
Class: |
G21F
3/00 (20060101); G21F 3/02 (20060101); G21f
001/12 () |
Field of
Search: |
;250/108 (FS)/
;2/2,2.5 |
References Cited
[Referenced By]
U.S. Patent Documents
Primary Examiner: Borchelt; Archie R.
Claims
I claim:
1. In a thyroid gland protector, a shield made of a material
substantially impervious to X-rays having a width at the center to
extend from the chin to the sternum and to encompass the forward
area of the neck as a collar so as to shield the larynx and the
thyroid gland from X-rays applied thereabove to the teeth, the
material of the shield at the ends extending beyond the back of the
neck so that the ends can contact each other, and means for
securing the contacted ends of the shield together at the back of
the neck to retain the shield in said position at the front of the
neck and provide protection circumferentially thereabout.
2. In a thyroid gland protector as recited in claim 1, wherein the
shield is of crescent shape having mateable top and bottom arcuate
edges which blend into ends which are securable together.
Description
BACKGROUND OF THE INVENTION
There is no known type of shield as provided by the present
invention for the purpose of shielding the thyroid gland of a
dental patient when the teeth are X-rayed.
SUMMARY OF THE INVENTION
The thyroid gland may be harmed by the primary and secondary rays
from an X-ray machine especially the glands of children. The shield
is formed from a material which bars most of the rays and which is
procurable in the trade. One form of the material can be obtained
from Bar-Ray of Brooklyn, N.Y. The material comes as a trilayer
sheet having a top and bottom layer of plastic such as vinyl and a
central layer of a similar or different plastic in which fine
particles of lead are retained in sheet form. A shield is cut from
the sheet material of such shape that it encompasses the entire
frontal area of the neck from the chin down to the sternum covering
the larynx and the thyroid gland. The shield protects the area from
the X-ray when used in the head area, particularly when used on the
teeth. The shield herein illustrated is of arcuate shape at the
bottom and top edges cut in a manner to use a minimum amount of
material for a plurality of the shields. The extending ends of the
shield may be secured together in any manner, such as by a clip
which clamps the two ends in fixed relation to each other. Snap
fasteners may be applied to the ends with a plurality of the male
type on one of the ends and a female type on the other end. A
"stick-type" plastic layer may be placed on facing sides of the
ends which secure the ends in releasable fixed relation to each
other. Strips of vinyl or other plastic material may be secured to
the edges of the shield body which may be tied or otherwise secured
together.
BRIEF DESCRIPTION OF THE DRAWING
FIG. 1 is a broken view in elevation of a dental patient having a
protective shield of the present invention secured over the frontal
neck area;
FIG. 2 is a broken plan view of a sheet of protective material with
the shields of the present invention cut therefrom;
FIG. 3 is a plan view of the shield after it has been stamped from
a sheet of the protective material;
FIG. 4 is a broken sectional view of the structure illustrated in
FIG. 3, taken on the line 4-4 thereof;
FIG. 5 is a broken view of the shield illustrated in FIG. 3, with
snap fasteners on the projecting ends which secure the shield in
protective position;
FIG. 6 is a view of structure, similar to that illustrated in FIG.
5, showing another form of securing means; and
FIG. 7 is a view of a shield having securing strips attached to the
edges thereof.
DESCRIPTION OF THE PREFERRED EMBODIMENT
The X-ray protective shield 11, as illustrated in FIG. 1, is
secured about the neck of a dental patient in position to cover all
of the front portion of the neck including the larynx and the
thyroid gland. In the illustration, the top edge of the shield
engages the underside of the chin while the bottom edge thereof
rests upon the sternum. The primary protection provided by the
shield is that for the thyroid gland which may be permanently
damaged from repeated application of X-rays thereto. A
well-informed dentist will avoid the application of the X-ray to
the teeth of small children because of the possible damage to the
thyroid gland and the present shield simplifies the decision for
the dentist to make when the question to X-ray or not to X-ray
occurs.
The shields 11 are stamped from a sheet of X-ray protective
material 10 in such manner as to obtain the maximum number of
shields from a sheet of predetermined width and length, as
illustrated in FIG. 2. The shield is of crescent shape having an
arcuate top edge 12 and an arcuate bottom edge 14 which may be
struck on the same or slightly different radii. Projecting ends 14
and 15 of the shield 11 are secured together by suitable means to
retain the shield in a protective position over the front portion
of the neck, as clearly illustrated in FIG. 1.
A sheet of protective material 10, as illustrated in FIG. 4, has a
central layer 16 which is made by the use of a plastic binder for
lead dust or particles which are retained in flexible sheet form
and which contain a maximum amount of lead within the layer. Layers
17 and 18 of a similar or different plastic material is adhered to
both surfaces of the central layer 16 to form a sandwiched
relationship therewith which strengthens and protects the inner
layer 16 against damage. The shield formed from the sheet bars the
passage of the majority of the primary rays and, most of all, the
secondary rays emitted from an X-ray machine.
As illustrated in FIG. 1, a clip 21 of the spring pressed pincher
type is used to secure the two ends 14 and 15 together. This type
of clip is usually found in any dentist's office and is otherwise
readily available. In FIG. 5, a snap button 22 is illustrated as
being applied to the end 14 of the shield while the end 15 has a
plurality of projecting nibs 23 to which the button 22 is
selectively securable. In FIG. 6, both of the ends 14 and 15 are
shown as having adhering strips of plastic material 24 thereon
which upon contact releasably secures the strips to each other and
the ends 14 and 15 in releasable fixed relation. In FIG. 7, a
shield 25 is illustrated having the ends 14 and 15 omitted and in
the place thereof ties 26 are heat sealed or otherwise attached for
drawing the shield about the neck and securing it in fixed relation
thereto. It is evident from the various types of securing means
herein illustrated that there are other types suitable in the art
which could be employed to support the shield directly over the
larynx and the thyroid gland from the chin to the sternum to
provide desired protection for the thyroid gland from the
X-rays.
* * * * *