US701616A - Dental tool for slitting cap-crowns. - Google Patents

Description

No. 70l,6l6. Patented lune 3, |902.

. C. J. REYNOLDS,

DENTAL TOUL FOB SLITTING GAP CROWNS. (Applicatio lad Dec. 27, 1901`) (No Model.)

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UNITED 'STATES PATENT OFFICE.

CLAYTON J. REYNOLDS, OF PITTSBURG, PENNSYLVANIA.

DENTAL TOOL FOR SLITTING CAP-CROWNS.

SPECIFICATION forming part of Letters Patent No. 701,616, .dated June 3, 1902.

Application filed December 2'7, 1901.. Serial No. 87.406. (No model.)

To @ZZ whom, t may concern.:

Beit known that I,v CLAYTON J. REYNOLDS, a citizen of the United States, residing at, Pittsburg, in the county of Allegheny and State of Pennsylvania, have invented certain new and useful Improvements in Dental Tools for Slitting Cap-Crowns, of which thefollowing is a specification, reference being had therein to the accompanying drawings.

The object of my invention ist'o provide a new and improved dental tool particularly adapted for slitting gold cap-crowns in the operation of removing a crown from a tooth; and to this end my invention consists of a new and improved crown-slitting tool and in the construction and combinationl of parts,all as fully hereinafter described and claimed.

In the accompanying drawings, which illustrate an application of my invention,vFigure 1 is an elevational view of a gold-croWn-slitting tool constructed in accordance'with my invention. Fig. 2 is a detailed'sectional view of a portion of one jaw; Fig. 3, a similar View showing the adjustable bearing-head in a different position from the position shown by Fig. 2; Fig. 4, a detailed perspectiveview particularly showing the slitting-blade; Fig. 5, a sectional viewshowing manner of attaching the blade to a jaw; Fig.'6, a perspective view of bearing-plate, andv Fig. 7 a perspective View of blade. j

Referring to the drawings, my invention, as illustrated, comprisesa crown-slittingtool or forceps having the general appearance of an ordinary pair of dental forceps-'that is to say, it is provided with the -usual handle members 1 and 2, joined togetherby a pivot 3. Jaw portions 4: and 5, respectively, carry an adjustable bearing-head 6 and an adjustable cutting and slitting blade 7. Bearinghead 6 has a shank 8, having annular grooves 9. Shank 8 fits into a socket 10, located in the jaw portion 4 and may be adjusted therein to various positions,as clearly shown by Figs. 2 and 3. A iat spring-plate 11, secured to the jaw 4, is provided witha pin 12, which passes through a hole in the jaWand enters one or the other ofthe annular grooves 9. The head :may be adjusted laterally by raising' the spring-plate with its pin 12. It will be noted that the shank of the bearing-head is mounted in the jawvin such a manner as to freely turn therein, thereby permitting the head to assume different positions relatively to the jaw in which itis mounted. One face of the head is preferably made concave, as

ing-surface 13.

VVThe manner of mounting the adjustable cuttingorslitting .blade 7 on the end of the jaw 'portion 5 is particularly shown by Figs. 4 and 5. Blade 7 has aV disk-shaped portion 14C, havinga'number of notches15 cut in the perimeter thereof, and is mounted on pin 16, which latter is Vpassed through holes in the slotted end of the jaw 5.

A spring-plate 17, similar to plate ll, having a pin 18, is employed for locking the blade in the desired position.

It is believed that the advantages resulting from the use of my tool over the tools heretofore designed to be used for accomplishing the same purpose will be readily appreciated. However, I desire to especially call attention to the adjustable bearing-head.. and the adj ustable l'cutting or slitting blade and the manner of mounting them on the jaws.

W'hat I claim is- F 1. A dental tool for slitting capcrowns,com prising a pair of forceps having an independently-adjustable bearing-head and an independently-adj ustable cutting or slitting blade arranged to coperate fwiththe adjustable bearing-head, for slitting cap-crownsin the operationv of removing cap-crowns from a tooth, substantiallyas set forth.

2. A dental tool for slitting cap-crowns,com prising a pair of forceps having jaw portions, one of which is provided with a socket and the other slotted,}and an adjustable bearinghead having a shank located in said socket, an adjustable cutting or slitting blade mounted in the slottedportion of the other jaw, substantially as set forth.

3. Adental tool forslitting capcrowns,com prising a pair of jaws, an adjustable bearinghead, an adjustable cutting or slitting blade, a socket in the end of one jaw for the bearinghead, means on the otherjawfor supporting the blade, said bearing-head'provided with a shank having annular grooves and apin for engaging with said grooves', substantially as set forth. j

In testimony whereof I affix my signature in presence of two witnesses(l CLAYTON J. REYNOLDS.

Witnesses:

MILDRED E. MGGREGOR, EDWIN L. ALLEN.

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