U.S. patent number 3,644,735 [Application Number 04/889,492] was granted by the patent office on 1972-02-22 for leveling mechanism for x-ray machines.
This patent grant is currently assigned to Litton Medical Products, Inc.. Invention is credited to Cornelius Keith Vandervelden.
United States Patent |
3,644,735 |
Vandervelden |
February 22, 1972 |
LEVELING MECHANISM FOR X-RAY MACHINES
Abstract
A leveling mechanism comprising two eccentrics rotatably mounted
around the mounting shaft of a suspension system that supports an
X-ray head. Respective wrenches for such eccentrics are mounted to
the suspension system and may cooperatively engage their respective
eccentrics to facilitate leveling of the suspension system in order
to prevent drifting of the X-ray head.
Inventors: |
Vandervelden; Cornelius Keith
(Kansas City, MO) |
Assignee: |
Litton Medical Products, Inc.
(Des Plaines, IL)
|
Family
ID: |
25395220 |
Appl.
No.: |
04/889,492 |
Filed: |
December 31, 1969 |
Current U.S.
Class: |
378/205;
378/197 |
Current CPC
Class: |
A61B
6/14 (20130101) |
Current International
Class: |
A61B
6/14 (20060101); H05g 001/00 () |
Field of
Search: |
;74/571R,571L,571M,211
;250/91,92 ;308/62 |
References Cited
[Referenced By]
U.S. Patent Documents
Foreign Patent Documents
Primary Examiner: Kaufman; Milton
Assistant Examiner: Shoemaker; F. D.
Claims
What is claimed is:
1. An X-ray apparatus comprising:
a web-shaped support member adapted to be mounted to a vertical
wall, said web-shaped member having respective top and bottom
horizontally disposed members, each respective horizontally
disposed member having a respective vertically disposed opening
therein;
a mounting shaft having a top portion and a bottom portion, said
mounting shaft mounted within said respective vertically disposed
openings of said respective horizontally disposed members of said
web-shaped support member;
a movable suspension system having a first end and a second end,
said first end of said movable suspension system rotatably mounted
to said top portion of said mounting shaft;
an X-ray head mounted to said second end of said movable suspension
system; and
a pair of abutting eccentrics located within said opening of said
bottom horizontally disposed member and located around said bottom
portion of said mounting shaft, said pair of abutting eccentrics
individually adjustable for aligning the axis of said mounting
shaft with the center of gravity in order to prevent drifting of
said mounted X-ray head.
2. An X-ray apparatus as recited in claim 1 further comprising:
a first wrench coupled to one of said abutting eccentrics for
facilitating adjustment of said one eccentric;
a second wrench coupled to the other of said abutting eccentrics
for facilitating adjustment of said other eccentric; and
locking means mounted to said bottom horizontally disposed member
of said web-shaped support member and coupled to said first and
second wrenches for retaining said first and second wrenches to
their respective eccentrics.
Description
FIELD OF THE INVENTION
This invention relates to leveling mechanisms and more particularly
to a leveling mechanism for a suspension-supported X-ray head.
DESCRIPTION OF THE PRIOR ART
Dental X-ray heads are normally supported by a suspension system
which is either attached to the wall of a dentist's office or
attached to a permanent mounting on the floor of the dentist's
office. In either case, the mounting shaft of the suspension system
must be precisely vertical or the dental X-ray head which is
attached to the end of the suspension system will drift, i.e., the
dental X-ray head will not hold the particular position in which it
is placed.
In the past, in order to overcome the problem of having a drifting
dental X-ray head, the repairman would attempt to install the
mounting shaft in a precisely vertical position by leveling the
upper edge of the wallplate and by placing shims behind the wall
plate. This method was quite tedious and typically followed the
trial and error approach. On numerous occasions such mounting of a
dental X-ray machine on the wall was done in a new building where
the walls had not yet settled. In many cases, after the original
installation of the dental X-ray machine, the walls of the office
would settle and a repairman had to be called back again to level
the mounting shaft in order to prevent drifting of the dental X-ray
head. The repairman had to be called every time the walls would
settle. Thus, considerable expense and downtime of the dental X-ray
machine was involved in the prior art method of preventing drifting
of the dental X-ray head because the dentist or dental X-ray
technician would have to call a repairman to relevel the mounting
shaft because they could not do it themselves.
Accordingly, it is an object of the present invention to provide a
novel leveling mechanism which is directly coupled to the mounting
shaft of the suspension system.
It is a further object of the present invention to provide a novel
leveling mechanism which may be readily adjusted by the unskilled
X-ray technician.
SUMMARY OF THE INVENTION
A leveling mechanism comprising two eccentrics rotatably mounted
around the mounting shaft of a suspension system that supports an
X-ray head. Respective wrenches for each eccentric are mounted to
the suspension system and may cooperatively engage their respective
eccentrics to facilitate leveling of the suspension system. The
respective wrenches may be rotated so as to rotate either or both
of the eccentrics in order to align the mounting shaft of the
suspension system precisely vertical, i.e., to align the mounting
shaft with the center of gravity.
BRIEF DESCRIPTION OF THE DRAWINGS
Additional objects, advantages and characteristic features of the
present invention will become readily apparent from the following
detailed description of the preferred embodiments of the invention
when considered in conjunction with the accompanying drawings in
which:
FIG. 1 is a front view of a wall-mounted suspension system having a
dental X-ray head supported thereon in accordance with the present
invention;
FIG. 2 is a side view of the wall plate of a suspension system that
is mounted to a wall and further illustrates the mounting shaft and
its leveling mechanism coupled thereto in accordance with the
present invention;
FIG. 3 is a cross section of the leveling mechanism in accordance
with the present invention; and
FIG. 4 is a top view of the leveling mechanism in accordance with
the present invention.
DESCRIPTION OF THE PREFERRED EMBODIMENTS
Referring now to FIG. 1, there is shown a dental X-ray machine 10
which includes suspension means 11 and a dental X-ray head 12. The
dental X-ray machine 10 may be mounted to the wall of the dentist's
office by means of a wall plate 13 and the screws 13a. As is well
known, if a suspension system is properly aligned with the center
of gravity any object supported by said suspension system can be
moved from one position to another position, and the suspended
object will remain stationary in the position to which it was
moved. However, if an object is supported by a suspension system
which is not properly leveled, i.e., if the suspension system is
not properly aligned with the center of gravity, the object
suspended from such suspension system will drift.
In the instant case, if the suspension means 11 is not properly
aligned with the center of gravity, the dental X-ray head 12 will
drift after it has been moved from one position to another.
Therefore, if a dentist or the dental X-ray technician positions
the dental X-ray head 12 in preparation to take a dental radiograph
and the suspension means 11 is not properly leveled, the dental
X-ray head 12 will drift from the position in which it was placed
and thus prevent the taking of a dental radiograph of the area
desired. Illustrated within an exposed portion of a cover 11b is a
mounting shaft 11a. The suspension means 11 is rotatably mounted on
the mounting shaft 11a. Therefore, if the mounting shaft 11a is
precisely vertical, the suspension system 11 will be properly
leveled and the dental X-ray head 12 will not drift.
Referring now to FIG. 2, there is shown a side view of the wall
plate 13 mounted to a wall 14 within the office of the dentist. In
the alternative, the wall 14 may represent a mobile cart to which
wall plate 13 is mounted. The cover 11b of the suspension means 11
of FIG. 1 has not been included in order to illustrate a web having
members 13b and 13c which retain the mounting shaft 11a. Coupled
around the mounting shaft 11a is a leveling mechanism 15 which is
comprised of a first eccentric 15a, a second eccentric 15b, a first
wrench 15c, a second wrench 15d, and a locking means 15e. A bearing
16 is shown mounted in the web member 13b and around the mounting
shaft 11a. Therefore, the mounting shaft 11a may be rotated within
the bearing 16 and the leveling mechanism 15 so as to rotate the
suspension means 11. The suspension means 11, as shown in FIG. 1,
would be mounted on to the mounting shaft 11a and it would be
rotated when the mounting shaft is rotated. The locking means 15e
may be partially released to allow the leveling mechanism 15 to be
manipulated.
Referring now to FIG. 3, there is shown a cross section of the
leveling mechanism 15 in accordance with the present invention. As
can be readily appreciated from a detailed study of this cross
section of the leveling mechanism 15, if either or both of the
eccentrics 15a and 15b are rotated, that part of the mounting shaft
11a located within the leveling mechanism 15 will be transposed to
a new location as a function of the movement of either or both of
the eccentrics 15a and 15b.
Referring now to FIG. 4 there is shown a top view of the leveling
mechanism 15 including the components discussed above and further
including the slots 15f and 15g in which the locking means 15e is
located. A dot, designated as 20, and a dashed circle designated as
21, are shown illustrated within the leveling mechanism 15. The dot
20 represents a point on the axis of the mounting shaft 11a in
proximity of the bearing 16. The area within the dashed circle 21
illustrates the area described by a point of the axis of the
mounting shaft 11a moving in a plane normal to such axis in
proximity of the leveling mechanism 15. In other words, in the
operation of the leveling mechanism 15, when the wrenches 15c and
15d are rotated, their respective eccentrics 15a and 15b will move
the mounting shaft 11a so as to make the mounting shaft 11a
precisely vertical. Thus, a point on the axis of 11a within the
plane of the circle 21 may be located in a plurality of positions
to accomplish the desired leveling in order to prevent drifting of
the dental X-ray head 12 of a particular dental office.
Thus, although the present invention has been shown and described
with reference to particular embodiments, for example, a leveling
mechanism which is located below a bearing of the mounting shaft,
nevertheless, various changes and modifications obvious to a person
skilled in the art to which the invention pertains, for example, a
leveling mechanism located above a bearing of the mounting shaft,
are deemed to lie within the spirit, scope and contemplation of the
invention as set forth in the appended claims.
* * * * *