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Патент USA US2119047

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May 31, 1938.
C. J. GAlL.
2,119,047
DENTAL CABINET
Filed Jan. 4,Y 1937
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Patented May 31, 1938
2,119,047
UNlTED STATES PATENTY
FFlCE
2,119,047
DENTAL CABINET
Cyril J. Gail, Santa Monica, Calif.
Application January 4, 1937, Serial No. 118,949
2 Claims.
This invention pertains to a dental cabinet or
similar article including a plurality of drawers
and provided with means whereby the drawers
may be selectively opened to permit ready access
to the contents thereof without causing the oper
ator to touch handles, pulls or other portions of
the cabinet with his hands.
(Cl. 45-7)
Although the invention is applicable to various
types of cabinets for use by various professions,
rangement of elements.
As shown in the drawing, the cabinet may in
clude an outer housing I5 provided with a table
it shall be described for purposes of illustration
as it particularly pertains to the dental profession.
Dentists, doctors, etc., while working on their
patients, find occasion to repeatedly change in
struments, implements, materials, etc., which are
ordinarily kept in suitable cabinets. Usually the
dentist or physician, while working on the patient
and while attempting to maintain his hands .in
sterile condition, has to Contact drawer pulls,
handles, and the like, in order to render additional
20
instruments, medicaments and the like available
for~ the proper treatment of his patient. Ob
viously, handles, drawer pulls and the like are
not sterile and as a result, the doctor’s or dentist’s
contact with such handles and drawer pulls has
a tendency to cause infection or inoculation of the
patient with whatever impurities, bacteria, spores
or the like may be picked up from such handles,
drawer pulls and the like.
An object of the present invention, therefore,
is to disclose and provide a dental or medical
cabinet or the like which may be actuated by
foot pedals, thereby eliminating the necessity of
contacting drawer pulls and handles with the
hands of the operator.
Another object of the invention is to disclose
l. .
and provide a cabinet provided with a plurality
of drawers, a foot pedal positioned at the bottom
of said cabinet and correlated with each of said
drawers, and suitable lever and link means in
operable engagement with each of said drawers
whereby a limited downward movement of a foot
pedal will produce a positive and ampliñed out
ward movement of a drawer.
These and other objects, uses and. advantages
of the invention will become apparent to those
skilled in the art from the following description
of a preferred arrangement of elements, it being
understood that the drawing and detailed de
scription referred to are for purposes of illus
tration and the invention is not limited to the
speciñc embodiments therein shown and de
scribed.
In the appended drawing:
Fig. l is a front view of a portion of a cabinet
embodying the structure of this invention.
Fig. 2 is a side elevation of the cabinet shown
in Fig. 1.
Fig. 3 is an enlarged vertical section taken
along the plane IIL-III of Fig. 1.
Fig. 4 is a horizontal section taken along the
plane IVv-IV of Fig. 1.
Fig. 5 is a horizontal section of a modified ar
or working shelf il and an upper section I2.
The upper section I2 may contain a plurality of
drawers, such as the drawers I3 and I4.
The
lower section of the cabinet may also include a
plurality of drawers, such as the drawers IE, I6,
í'l, I8 and the like. These lower drawers ordinari
ly contain those instruments, medicaments or
other tools and accessories which the operator
most often requires in his work. Means are pro
vided in accordance with this invention for auto
matically opening these drawers so as to render
20
their contents readily accessible without manual
contact.
As shown in the drawing, the drawers I5, I‘B,
I'I and I8 are provided with such means which in
clude foot pedals 20, 2l , 22 and 23, pivotally con
nected to the bottom of the housing Ill. Such
pedals may be either in the form of a bell crank,
as shown, or in the form of a sector pivoted as at
24. Vertical lever members 25, 26 and 21 are 30
positioned in the back of the cabinet, said mem
bers being pivotally connected at some point in
termediate their ends, as. for example at 28. One
end of the bell crank lever constituting the foot
pedal may be operably connected as by means of
a link 29 with the lower end of the vertical lever
member 25.
A compound link motion, consisting of the links
3i) and 3l, is positioned back of each of the
drawers, such as the drawer I5. One end of the
link 3l! is preferably pivotally attached to a
suitably ñxed support as, for example, at 32.
The links 30 and 3l are pivotally connected as. at
33, the free end of' link 3l being pivotally con
nected to the drawer I5 as at 34. The end of the
vertical lever member 25 contacts with the link
3l) at a point spaced from the pivot point 32 and
closer to said' pivot point than to the junction 33
with the link 3l.
With the arrangement shown, downward move 50
ment of the pedal 2t will cause a rearward thrust
of the link 2S, causing the vertical lever member
25 to pivot on the point 28, thereby causing the
links 3€! and 3| to move forwardly into the posi
tion shown in dotted lines in Fig. 4, in which 55
2
2,119,047
position the drawer is in partly ejected position
with its contents readily available to the oper
ator. The drawer will remain in this ejected
position as long as foot pressure is applied to the
pedal 20 and upon release of such pressure will
return to its original closed position under the
influence of the spring 35 connecting the rear
portion of the drawer I5 with the rear wall of the
cabinet or housing I0. The rearward or closing
10 movement of the drawer I5 will return the com
pound link motion and the lever 25 as well as the
foot pedal 2U to their original positions.
Attention is called to the fact that the link 3|
is shorter than the link 30 and in closed position,
15 as indicated in Fig. 4, an angle of not less than
about 10° should exist between the members 30
and 3l in order to permit the proper functioning
of the device. The length of the members 30
and 3l, levers 25 and the position of the pivot
point 28, etc., can be varied in accordance with
the general size and structure of the cabinet and
the extent to which amplification' of the down
ward movement of the pedal 20 is to be converted
into the linear motion of the drawer I5.
25 Since the lever members 26 and 21 are shorter
than the lever 25, it may be necessary to move
the pivot points 28 downwardly on the shorter
levers 26 and 2l and to space the ends of the
levers 25 and 21 slightly different distances from
30 the pivot points 32 in order to produce desired
ejection of the drawers I6 and I‘I.
In Fig. 5 a modiñed form of compound link
motion is shown. A bell crank lever 40 is
mounted on a vertical stationary pin 4 I , the short
35 arm of said bell crank lever being in contact with
the vertical lever member 25'. 'I'he outer end of
the longer arm of the bell crank lever is pivotally
connected to a link 42 which in turn is pivot
ally connected to the back of a drawer. In oper
ating,
this movement of lever 25’ moves in the
40
direction of the arrow and such motion is im
parted to the lever by causing the foot pedal and
its connected link 29 to operate a bell crank
lever which in turn is connected to the lower end
of the lever 25', which in this case is mounted
on a pin extending from front to rear of the
cabinet.
It will be obvious to those skilled in the art that
numerous otherl link motions can be devised.
Those specifically referred to are of advantage in
that they occupy but little space and are free
from operating diiìculties caused by the forma 10
tion of directly opposing forces in the linkage.
All changes and modiñcations as come within the
scope of the appended claims are embraced
thereby.
15
I claim:
l. In a dental cabinet, the combination of: a
horizontally slidable drawer, a foot pedal pivotal
ly attached to the lower portion of the cabinet,
a vertically exten-ding lever means carried in the
back of said cabinet, said vertically extending 20
lever means being operably connected to said
foot pedal, and an extensible link means oper
ably associated with the back of the drawer and
connected to said vertical lever means whereby
limited downward movement of the foot pedal 25
causes a horizontal and outward movement of
the drawer.
2. In a dental cabinet, the combination of: a
horizontally slidable drawer, a foot pedal pivot
ally attached to the lower portion of the cabinet, 30
a vertically extending lever means carried in the
back of said cabinet, said vertically extending
lever means being operably connected to said
foot pedal, an extensible link means operably
associated with the back of the drawer and con 85
nected to said vertical lever means whereby lim
ited downward movement of the foot pedal causes
a horizontal and outward movement of the
drawer, and spring means associated with said
drawer for returning the same to original position. 40
CYRIL J. GAIL.
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