US503258A

US503258A - stanbrough

Info

Publication number: US503258A
Authority: US
Publication date: 1893-08-15
Anticipated expiration: 1910-08-15

Description

l (No'Model.)

` R. G. STANBROUGH.

' A DENTAL DISKAND M RFJER.y N0.'503,258.` Patented Aug. 15, 1893.

UNITED STAT-Es PATENT @EnronC RUFUS Gr.V STANBROUGH, OF NEW YORK, N. Y.

DENTAL nlspK AND cARRuaR.

SPECIFICATION forming part 0f Letters Patent. No. 503,258, dated August 15, 1893.

Application h'led January 29, 1892. Renewed January 18, 1893. Serial No. 458818. (No model.)

.T0 all whom it may concern:

Beit known that I, RUFUs G. STANBROUGH, a citizen of the United States, and a resident of New York, in the county of New York and State of New York, have invented certain new and useful Improvements in Disks and Disk- Carriers, of which the following is a specication. Y

This invention relates to certain new and useful improvements vin disks and disk carriers for use in operative dentistry and particularly to those disks of grinding or polishing material used to smooth, polish or burnish fillings. Heretofore these disks have been provided with a single central aperture through which they have been attached to the carriers by an adjusting screw, or some other securing device the said carriers therefore, usually comprising two or more parts, one or more being small and delicate, and not only liable to rust and get out of order, but also, owing to their construction, requiring much time in adjusting the disk on the carrier and securing it in place.

It is the object of my invention, therefore, to obviate, these objections and to produce a disk and a carrier therefor which shall be simple and economicalin construction, not liable to rust and unable to get out of order, and to reduce the time and labor of putting the disk on the carrier and securing it in place to the minimum.

To this end my said invention consists in the combination of parts and details of construction, as hereinafter more specifically described and pointed out in the claims.

In the drawings, in the several gures of which like parts are similarly designated, Figures 1, 2 and 3 are detail views of the disk carrier. Fig. 4, represents lthe guard plate or shield of the disk. Fig. 5, is a bottom view of a disk; and Fig. 6, is a top view thereof. Fig. 7, is a perspective of a disk attached to the carrier; and Fdg. 8, is a section at the line w, Fig. 7.

a is the shank of the carrier which may be of any usual and wellknown construction, having secured thereto, as by screwing, soldering or otherwise, the reduced extension b provided with the T-head cA Before the said extension b is secured in the shank a, however,

the lock-plate d is passedlover said extension Z7, and against the T-head c, and the coil spring c is also passed over said extension and the shank and extension are then secured together, the spring e bearing against the shoulder f, formed by the head of the shank a, ad serving topress the lock-plated firmly against the T-head c. The said lock-plate is preferably of the form shown, in Fig. l, consisting of a circular portion provided with a central aperture conforming to the conguration of the extension b over which it travels, and having laterally projecting diametric lugs g for a purpose hereinafter explained.

The disks h are of the usual grinding or polishing material and are punchedfrom sheets in the usual manner. These disks are provided with the central elongated opening i, which may be either rectangular, or as shown,

elliptical and the slits j arranged longitudinally and at right-angles to the elongated opening i. The disk h,'is then provided with the guard plate 7g stamped or struck up from thin metal, such'as thin sheet brass or other suitable material, said guard plate consisting of a preferably circular portion provided with a central aperture corresponding with the aperture t' in disk h and theilanged lugs Zadapted to enter and pass through the slits j, in the disk, and for better securing the guard-plate k to the disk h, the lugs Z may be inclined inwardly beyond the perpendicular, as shown especially in Fig. 4.

When it is desired to attach a disk to the carrier, the T-head c, is inserted through the elongated openings z' in the disk and its guard plate, k, and the spring c, and lock-plate d are slightly depressed. The carrier is then given a half turn and until the lugs on the disk guard plate k impinges against and engages with the lugs g on lock plate d, when the T- head c will be at right-angles to the elongated opening c' in the disk and guard-plate and will bear upon said plate la atY both sides of the opening while the lock-plate cl and spring e serve to press the disk h firmly against the T- head c and the said disk is thus securely locked in the direction of rotation. The diametric lugs g, g, of the lock-plate d when the parts are in operative relation bear against the edges of the protruding flanged lugs Z of the guard plate 7a, the rotary power of the shank being applied to the disk h through such contact.

Vhat I claim as new, and desire to secure by Letters Patent, is-

1. A disk for operative dentistry provided with a central elongated opening and slits at either end of said central opening, and at rightangles thereto, substantially as described.

2. A disk for operative dentistry provided with a central elongated opening and slits at either end of said central opening, and at rightangles thereto, and a guard plate provided with a central aperture to correspond with the central opening in the disk and lianged lugs entering and protruding through the slits in said disk, substantially as described for the purposes set forth.

3. A disk for operative dentistry provided with a central elongated opening and slits at either end of said central opening and at rightangles thereto, and a guard plate provided with a central aperture to correspond with the central opening in the disk and anged inwardly inclined lugs adapted to enter the slits in said disk, substantially as described for the purposes set forth.

4. Atool for operative dentistry comprising a shank having a reduced extension carrying rabaste a T-head; a lock plate comprising a circular' portion, having oppositely arranged lugs, Working over said reduced extension and held in position by a coil spring, substantially as described.

5. In a tool for operative dentistry, a shank having a reduced extension carrying aT-head, a lock plate comprising a circular portion having oppositely arranged lugs, working over said reduced extension and held in position by a spring in combination with a disk provided with a central elongated opening adapted to engage and lock the T-head of the carrier, and slits at either end of said central opening and at right-angles thereto, a plate provided with a central aperture to correspond with the central opening in the disk, and flanged lugs adapted to enter the slits in said disk and engage the flanges in the lock plate, of the carrier, substantially as described.

Signed at New York,in the county of New York and State of New York, this 15th day of January, A. D. 1892.

RUFUS G. STANBROUGH.

Witnesses:

FREDERIC CANAGAN, ERNEST C. WEBB.