Improvements in Dental Cervix Clamps.
Year: 1892

page_text: Date of Application, 13th Sept., 1892
Complete Specification Left, 13th June, 1893-Accepted, 13th Sept., 1893
PROVISIONAL SPECIFICATION.
Improvements in Dental Cervix Clamps.
1, ASHER ISAAC FALK BUXBAUM, of 511, McMillan Street, Walnut Hills,
Cincinnati, Hamilton County, State of Ohio, United States of America, Dentist,
do hereby declare the nature of this invention to be as follows :-
My invention is in the nature of an improvement in dental cervix clamps which
are used for pushing back and holding back the gum and rubber dam from the neck
of the-tooth so as to permit of the treatment of decay cavities occurring at this
point. It consists in the peculiar construction and arrangement of parts of the
clamp, whereby it is adapted to fit the neck of any sized tooth and its parts rendered
adjustable and interchangeable.
its
The clamp comprises a plate or frame formed with inclined flanges upon
sides between which is held and adjusted the thickened end of an arm which is bent
twice at right angles and terminates at its lower end in clutch points that engage
with the inuer neck portion of the tooth, the main plate also terminating at its lower
end in points that clutch against the tooth. The plate frame is slotted both at its
upper and lower portions and it is connected adjustably to the inner bent arm by
means of a set screw which passes through the upper slot and is tapped into the screw
threads of the thickened upper end of said arm. When this set screw is turned up,
it draws the bent arm and the plate or frame together and causes the tooth to be
clutched between the points on the two. Curved arms are adjustably attached to
the lower end of the frame. These arms are made alike in the form of a semi-
elliptical curve and terminate at their lower ends in blades with teeth or spurs on
their inner edges which embrace between them the neck of the tooth. These curved
arms are connected to the main frame by a pivotal clamp consisting of a slide
moving vertically in guides in the frame and having a screw stem that passes
Upon
through the slot in the frame and also through the pivot holes in the arins.
the protruding end of this screw stem is turned a nut terminating as a knob with a
neck in it for tightening it by a screw driver. This pivotal connection of the arms
permits, by reason of the slot in the main frame, of the vertical adjustment of the
arms to correspond to the height and length of the tooth. It also permits of
the pivotal adjustment of the arms, which serves to bring the spurs or teeth and
the blades on the lower edges of the arms closer together or farther apart in
spanning the neck of a larger or smaller tooth. The lower edge of the blades may
be made straight, but is preferably curved in such a manner that when brought
After the arms have been fitted to
together or separated they still form a curve.
the neck of the tooth, the nut may be tightened so as to lock the pivotal connection
and clamp the parts rigidly together. It will thus be seen that the adjustable
arms adapt the clamp to any size tooth, from an incisor to a molar or from a short
to a long tooth, and if said arms or either of them become damaged they may be
easily removed and replaced with another or others.
Dated this 13th day of September 1892.
By A. M. & Wm. Clark,
53, Chancery Lane, London, Chartered Patent Agents.

page_text: COMPLETE SPECIFICATION.
Improvements in Dental Cervix Clamps.
I ASHER ISAAC FALK BUXBAUM, of 511 M°Millan Street, Walnut Hills,
Cincinnati, in the County of Hamilton and State of Ohio, U.S. America Dentist
do hereby declare the nature of this invention and in what manner the same
is to be performed, to be particularly described and ascertained in and by the
following statement :-
My invention is in the nature of an improvement in dental cervix clamps which
are used for pushing back and holding back the gum and rubber dam from the neck
of the tooth, so as to permit of the treatment of decay-cavities occurring at this
point.
It consists in the peculiar construction and arrangement of parts of the clamp,
whereby it is adapted to fit the neck of any sized tooth and its parts rendered
adjustable and interchangeable, as hereinafter fully described.
Figure 1 is a perspective view of my clamp shown applied to a tooth. Fig. 2 is a
vertical section, and Fig. 3 is a horizontal section through line x x of Fig. 2.
In the drawings, A represents the main frame, which has inclined flanges a a
upon its sides, between which is held and adjusted the thickened end of the arm B,
which is bent twice at right angles and terminates at its lower end in clutch
points bb, that engage with the inner neck portion of the tooth. The main frame A
also terminates at its lower end in points a¹ a', that clutch against the tooth, and
said main frame A is also slotted both at its upper and lower portions to connect
with the other parts. It is connected adjustably to the inner bent arm B by means
of a set screw C, which passes through the upper slot and is tapped into the screw
threads of the thickened upper end of the said arm. When this set screw is turned
up, it draws the bent arm and the main frame together and causes the tooth to be
clutched between the points a¹ a¹ and b b.
To the lower end of the main frame are adjustably and removably attached the
curved arms D D. These arms are made alike in the form of a semi-elliptical
curve and terminate at their lower ends in blades d d with teeth or spurs d¹ d¹ on
their inner edges which embrace between them the neck of the tooth. These
curved arms D are connected to the main frame A by a pivotal clamp consisting
of a slide e, moving vertically in guides in the main frame and having a screw-
stem that passes through the slot in the main frame and also through the pivot-
holes of the arms D. Upon the protruding end of this screw-stem is turned a
nut, terminating as a knob, with a nick in it for tightening it by a screw-driver.
This pivotal connection for the arms, permits by reason of the slot in the main
frame of the vertical adjustment of the arms to correspond to the height and length
of the tooth. It also permits of the pivotal adjustment of the arms, which serves
to bring the spurs or teeth and the blades on the lower edges of the arms closer
together or farther apart in spanning the neck of a larger or smaller tooth. The
lower edges of these blades may be made straight, but are preferably curved in
such a manner that when brought together or separated they still form a curve.
After the arms have been fitted to the neck of the tooth the nut f may be
tightened, so as to lock the pivotal connection and clamp the parts together. It
will thus be seen that the adjustable arms D adapt the clamp to any sized tooth
from an incisor to a molar or from a short to a long tooth, and if said arms or
either of them become damaged they may be easily removed and replaced with
another or others.
Having now particularly described and ascertained the nature of my said inven-
tion, and in what manner the same is to be performed, I declare that what I
claim is :-
(1.) A dental cervix-clamp having arms DD with teeth ar
adented to

page_text: embrace between them a portion of the neck of the tooth, the said arms being
pivotally connected to the clamp and made adjustable, as described.
(2.) In a dental cervix-clamp, the arms D D, with teeth or spurs adapted to
embrace between them a portion of the neck of the tooth, in combination with a
slide moving vertically in the clamp-frame and having a screw-stem passing
through the arms and forming a connection for the same and a screw nut or knob
fitting said screw stem and adapted when turned up to rigidly fix the arms to the
clamp, substantially as shown and described.
(3.) A dental cervix clamp consisting of the flanged and slotted main frame A
and the bent arm B, having clutch-points at their lower ends, the clamp screw for
fastening the two together, and the pivotally connected and adjustable arms D D,
with means for rigidly connecting the same to the main frame, substantially as
shown and described.
Dated this 13th day of June 1893.
HUGHES, SON & Co.,
38, Chancery Lane, W.C., Agents for the Applicant.