Improvements in Devices for Separating Teeth.
Year: 1890

page_text: Date of Application, 13th Dec., 1890
Complete Specification Left, 10th Sept., 1891-Accepted, 31st Oct., 1891
PROVISIONAL SPECIFICATION.
Improvements in Devices for Separating Teeth.
I, FRELINGHUYSEN SAWHILL, of Sioux Falls, in the County of Minnehaha
and State of South Dakota, United States of America, Dentist, do hereby
declare the nature of said invention for IMPROVEMENTS IN DEVICES FOR
SEPARATING TEETH, to be as follows :-
:-
My invention relates to improvements in devices for separating teeth.
Frequently dentists encounter great difficulty in filling teeth owing to the
fact that the teeth are crowded too close together to admit of the proper operations
being performed.
The object of my invention is to provide a simple and economical device
whereby the teeth may be separated and held in such position until the operation
of filling is completed.
I employ a brace consisting of a curved rod of metal, forming almost a complete
circle. One end of the rod is provided with a conical recess, in which the
correspondingly-shaped end of a wedge is inserted. This wedge is provided with
an annular groove, with which a pin passing through the end of rod engages, so as
to hold the wedge in place. This wedge is capable of freely revolving within the
recess in the rod. The other end of the rod is formed or provided with a tubular
arm. Within this tube is a reciprocating rod, having a conical recess, within
which fits and revolves a wedge, provided with an annalar groove, with which a
pin engages to hold the wedge in place. This rod is provided with a horizontal
peripheral slot with which engages a screw, which prevents the rod from revolving,
but permits it to reciprocate up and down. This rod is also provided with a screw-
threaded recess, within which works a screw-threaded rod, having an enlarged
head and an annular groove. With this groove engages a screw or screws to
hold the rod in place. The rod is also provided with a disk, by which it may be
rotated.
The operation will be readily understood. The implement is inserted in the
mouth with the wedge resting between the teeth to be separated. The screw-
threaded rod is then rotated by means of the disk which carries the reciprocating
rod to be advanced forward, carrying its wedge. As these wedges thus approach
each other the teeth are separated, and may be held in such position until the
filling is completed. A reverse movement of the disk will disengage the wedges.
It will be observed that by turning the brace to the right or left the operator is
enabled to work from either side without removing the separator.
Dated this 12th December 1890.
F. W. BARKER,
Applicant's Agent.
COMPLETE SPECIFICATION.
Improvements in Devices for Separating Teeth.
I, FRELINGHUYSEN SAWHILL, of Sioux Falls, in the County and State of
South Dakota, 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 relates to improvements in devices for separating teeth.
Frequently dentists encounter great difficulty in filling teeth owing to the fact

page_text: that the teeth are crowded too close together to admit of the proper operations
being performed.
The object of my invention is to provide a simple and economical device whereby
the teeth may be separated and held in such position until the operation of filling
is completed.
The invention consists in the novel implement hereinafter described, and
specifically defined in the claims..
In the accompanying drawings Figure 1 represents an implement for separating
teeth made in accordance with my invention. Fig. 2 is a central vertical section of
the same.
In the said drawings the reference numeral 1 designates a brace consisting of a
curved rod of metal, forming almost a complete circle. One end of the rod is
provided with a conical recess, in which the correspondingly shaped end of a
wedge 3 is inserted. This wedge is provided with an annular groove 4, with which
a pin 5 passing through the end of rod 1 engages, so as to hold the wedge in place.
This wedge is capable of freely revolving within the recess in the rod. The other
end of the rod is formed or provided with a tubular arm 6. Within this tube is a
reciprocating rod 7, having a conical recess, within which fits and revolves a
wedge 8, provided with an annular groove 9, with which a pin 10 engages to hold
the wedge in place. This rod is provided with a horizontal peripheral slot 12,
with which engages a screw 13, which prevents the rod from revolving, but permits
it to reciprocate up and down. This rod is also provided with a screw threaded
recess 14, within which works a screw threaded rod 15, having an enlarged head 16
and an annular groove 17. With this groove engages a screw or screws 18 to hold
the rod in place. The rod is also provided with a disk 19, by which it may be
rotated.
The operation will be readily understood.
The implement is inserted in the mouth with the wedge 3 resting between the
teeth to be separated. The rod 15 is then rotated by means of the disk 19, which
carries rod 7 to be advanced forward, carrying with it wedge 8. As these wedges
thus approach each other the teeth are separated, and may be held in such position
until the filling is completed. A reverse movement of the disk will disengage the
wedges. It will be observed that by turning the brace to the right or left the
operator is enabled to work from either side without removing the separator.
Having now particularly described and
tion, and in what manner the same is to
I claim is :-
ascertained the nature of my inven-
be performed, I declare that what
1. An implement for separating teeth, consisting of a curved metal bar or rod
having a revolving wedge at one end, a tubular arm at the other end having a
revolving wedge and a screw threaded recess, and a screw threaded rod working in
said recess, substantially as described.
2. In an implement for separating teeth, the combination, with the curved
metal bar having a revolving wedge at one end and a tubular arm at the other end,
of a rod fitting within said arm having a horizontal peripheral slot and screw
threaded recess, a screw threaded rod fitting in said recess having an enlarged
head, annular groove, and operating disk, and screws engaging with said groove
and slot, substantially as described.
Dated this 10th day of September 1891.
F. W. BARKER,
Applicant's Agent.