US1306696A - Tooth-separator - Google Patents

Description

1. w." IVORY.

TOOTH SEPARATOR.

APPLICATION FILED MA R.4. i919.

1,306,696. PatentedJune 17, 1919.

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UNITED STATES PATENT OFFICE.

JAMES W. IVORY, OF PHILADELPHIA, PENNSYLVANIA.

TOOTH-SEPARA'I'OR.

Specification of Letters Patent.

Patented June 17', 1919.

Application filed March 4, 1919. Serial No. 280,618.

To all whom it may concern Be it known that I, J AMIES W.'IvoRY, a subject of the King of Great Britain, residing in the city and county of Philadelphia, State of Pennsylvania, have invented a newand useful Tooth-Separator, of which the following is a specification.

My invention relates to a tooth separator which may be of the Elliott type shown in the Letters Patent of the United States No. 426,258 granted April 22nd, 1890, and consists of an attachment to such separator, whereby the latter is prevented from tilting longitudinally, or laterally, or sliding on the gums, and necks of the teeth, or otherwise changing its position.

The invention is satisfactorily illustrated in the accompanying drawing but the important instrumentalities thereof may be varied, and so it is to be understood that the invention is not limited to the specific de' Fig. 4 represents a perspective view of an Similar numerals of reference indicate corresponding parts in the figures.

Referring to the drawings.

1 designates pivoted arms on which are the separating wedges 2, said arms being adapted to be operated by the yoke 3, and the thumb screw 4:, as well known to the dental trade in the Elliott separator.

The terminals of said arms are extended back of the wedges 2 and raised forming the beds 5 in which are the slots 6, the latter receiving the'screws 7. Seated on said beds and having the screws 7 pass through openings in the same are the anchor plates 8, the

peripheries of which are provided with lips 9 which are adapted to project angularly therefrom into said slots 6 of the beds 5 and so prevent improper rotation of said plates and other parts supported thereon. On said screws 7 above said plates 8 are the milled nuts 10, the resilient bows 11, the limbs of the latter having therein the elongated slots 12 and 13, it being noticed that the'said slots are adapted to have the screws 7 pass upwardly therethrough, the threaded ends of the same having thereon the cap nutslet which are adapted to tighten against the upper limbs of the bows 11, and thus adjust the degree ofdivision of the bows, and hold the bows in adjusted position assisted by the lower or inner nuts 10 and firmly clamping. the contiguous members on the beds 5. j j

The bows are formed of elongated plates of metal or other suitable material bent on each other into somewhat elliptical shape rendering the limbs thereof resilient, the

lower limbs having theirinner ends facing inwardly toward the tooth so as to engage the buccal and lingual sides thereof, the edges of said limbs being somewhat concave to conform to the shape of the portions of the tooth, with which they contact, it being seenalso that owing tothe elongated slots 12 and 13 in thesbows, the latter may be moved in and out and'raised and lowered, and so be adjusted with nicety in lateral and vertical directions to the tooth with which they are to engage, and when so adjusted. the cap nut is tightened and so the bowsre tain their positions.

Attention is drawn to the fact that the bows are in hlgher planes than the wedges 2," consequently the upper limbs of said" vented from' dropping or sliding on the gumsytilting in any direction, or otherwise changing its position.

The operation is as follows As the wedges of this separator engage the teeth, and the separation begins, the terminals of the bow plates being in position, the lower arms are against the buccal or lingual side of the teeth, and the upper arms rest on the biting or grinding edge of the teeth, the entire spring being only loosely held on the nuts on the post. As the separation takes place and the jaws move forward toward one another to make the same, the lower arm of the plate forces the entire spring on both sides in the reverse Way to which the wedge is moved, this being held in position while the separation is going on.

\Vhen the separation is sufiicient the cap nut of the post is made taut against the upper arm and the lower arm resting against the lower nut on the post, holding it in place, thus preventing the jaws of the separator from tilting or being allowed to sag down on the tissues of the gun.

Having thus described my invention what I claim as new and desire to secure by Letters Patent, is

1. A tooth separator formed of arms, and wedges thereon, and means engageable with said arms whereby said wedges are adapted to be operated, and further of means mounted on or about the extreme ends of said arms adapted to engage a tooth for preventing the separator when in use from changing its position.

2. A tooth separator provided with arms, and wedges thereon, and attachments on said arms adapted to prevent the separator when in use from changing its position, said attachment being in a higher plane than said wedges whereby it may be engaged with a tooth independent of said wedges.

8. A tooth separator formed of arms, and wedges thereon, beds on said arms, and bowlike members adapted to be supported ad justable on said beds and to engage a tooth whereby the separator when in use is prevented from changing its position.

4:. In a tooth separator,resilient bow-like members adapted to engage a tooth inde pendent of the wedges of the separator, screws on the arms of said separator adapted to connect said bow-like members with said arms, and means on said screws for retaining said members firmly on said arms.

5. In a tooth separator, resilient bow-like members adaptedto engage a tooth independent of the wedges of the separator, screws on the arms of said separator adapted to connect said bow-like members with said arms, and means on said screws for retaining said members firmly on said arms, said bow-like members being adapted to be adjusted vertically and laterally on said screws.

6. A tooth separator provided with arms and wedges thereon, and means engageablewith said arms Whereby said wedges are adapted to be operated, resilient members adapted to be supported on said arms, screws on the latter adapted to have said members fitted thereto, and nut-like members on said screws on opposite sides of said members,

whereby the latter may be adjusted in the direction of the length of said screw relatively to a tooth with which they engage independent of said Wedges and tightened in their adjusted position.

7 In a tooth separator, resilient bow like members adapted to engage a tooth independent of the wedges of the separator, screws on the arms of said separator adapted to connect said bow-like members with said arms, and means on said screws for retaining said members firmly on said arms, said members having therein elongated slots which receive said screws whereby the members are adjustable in lateral directions.

8. In a tooth separator provided with arms, and wedges thereon, and means engageable with said arms whereby said wedges are adapted to be operated, slotted beds on said arms, resilient attachments on said beds adapted to prevent the separator when in use from changing its position, screws connectible with said beds, and attachments for supporting the latter on the former, butts on said screws on opposite sides of said attachments for adjusting and securing the latter in position, and anchorplates on said screws intermediate of said beds and adjacent nuts, said plates having therein projections which are adapted to be fitted in the slots of said beds.

JAMES W. IVORY.

\Vitnesses:

J 01m A. VVIEnnRsHmM, N. BUSSINGER.

Copies of this patent may be obtained for five cents each, by addressing the Commissioner of Patents,

Washington, I). G.

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