US1072357A - Dental device. - Google Patents

Description

C. J. PALMER.

DENTAL DEVICE.

APPLICATION FILED MAR. 10. 1913.

1,072,357, Patented Sept. 2, 1913.

WITNESSES INVENTOR y MM w.,,qm' P UNITED s'rn'rnsrnrnnr onrion.

CHARLES JENNISON PALMER, OF APPLE'ION, WISCONSIN.

DENTAL DEVICE.

Specification of Letters Patent.

Application filed. March 10, 1913.

1 '0 all whom it may concern Be it known that I, CHAnLns JENNISON PALMER, a citizen of the United States, residing at Appleton, in the county of Outagamie and State of WVisconsin, have invented new and useful Improvements in Dental Devices, of which the following is a specification.

My invention relates to an improved dental device and has as its principal object the provision of means whereby gold crowns may be readily removed from teeth without splitting or otherwise injuring them.

A further object is to provide a device adapted to 'remove any form of crowns on teeth.

A further object resides in the particular arrangement and combination of parts hereinafter described.

In the accompanying drawing :Figure 1 is a perspective view showing my improved device and illustrating its manner of use. Fig. 2 is a detail view, partly in section, showing the clamping or gripping part of my device and its method of application. Fig. 3 is a view in elevation taken at right angles to Fig. 2.

Throughout the various views, the same part is referred to by the same reference character.

Referring more particularly to the drawing, 1 is a rod adapted to be held in the hand of a dental operator as indicated by the dotted lines at 2.

3 is a chain or other flexible element attached to the rod 1 by means of an eye 4-. At the end opposite to the eye t the chain is attached to an integral strip 5 of spring material formed into substantially U-shape. Strip 5 is provided with inwardly projecting fingers 6 adapted to fit under a crown 7 which has been fitted over the outer surface of a tooth such as 8. It will be noted that the crown 7 is of a type which is held on by means of a band, and it is one of the chief advantages of my device that it enables a dental operator to remove such metal band without mutilating it. The opposed sides of Patented Sept. 2, 1913.

Serial No. 753,454.

the strip 5 are connected by a threaded bolt 9 and a nut 10 is provided for adjusting the strip 5 so that the fingers (5 may properly engage a crown to be removed.

It will be obvious that while my device is particularly adapted to remove crowns attached to metal bands, that it is also adapted to move any form of crowns or to remove pins upon which crowns have been placed.

In the operation of my device, the spring strip 5 is adjusted to engage the crown to be removed in a manner best adapted to the particular class of crown being operated upon. The rod 1 is then grasped in one hand near one end and the other end of the rod near the chain is tapped gently by a mallet or other convenient instrument, a mallet being shown in dotted lines at 11.

I find that the flexible connection 3 between. the rod 1 and the strip 5 transmits the blow from the rod to the strip with sullieient force to move a crown, while at the same time, the vibration of the member 3 is such that sudden shocks on the crown are avoided and that the crown is removed without damage. This is true although member 3 is a metallic chain.

It may be understood that while I have shown and described the preferred form of my invention, various modifications and rearrangements thereof may be made without departing from the spirit of my invention, and that I do not limit myself to the precise form shown and described.

lVhat I claim is A dental tool comprising in combination, a rigid rod adapted to be held in the hand, a member adapted to engage the object to be removed, comprising means whereby it may be adjusted to make proper engagement with the object and a flexible connection between said rod and said member.

In testimony whereof I aflix my signature in the presence of two witnesses.

CHAR-LES J EN NII'SON PALMER. Witnesses E. A. WVAI/rHnns. R. E. CAnNonoss.

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

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