US1684143A - Dental instrument - Google Patents

Description

2+ i wIrHMMM WMIMIWUL@ sept 11, 1928.

Patented/l Sept. l1, l1928. v

. y *1,684,143 y :'*UfN'lTED STATES PATENT #orma- 1 oscn n. rmrnn. AND cnam-:s n. nEITzLEn, or nocH'EsTER, NEW Yong, AssIGNons TO OSCAR H. PIEIER AN D ALPHONSE F. IEIEIER, BOTH 0F ROCHESTER, NEW -YOBK i ,DENTAL INSTRUMENT.

OurY invention relates to dental instruments and. particularly' to instruments utillzmg 'electrlccurrent and adapted for interchangeable -application to a supporting handle .which also'carries` switch mechamsm 'for 'contro1ling the current flow` to the-supported yinstruments."

ture. 'f f l y Another important object of the invention is to adapt theconcentric-'terminal members for directly supporting various instrument' points and for holdingthe points in adjusted vthe points.

position, one of the terminalmembers form# ing a receiving and supporting stud for the pointsA and the other conductor forming a concentric socket foraliging and gripping' The above and other features of the invention are incorporated in the structureshown on the drawings in which Figure V1 is a side elevational view of the instrument and handle structure with partof the handle structure in diametrical section;

. and f Fig. 1.

Fig. 2 is a sectional view on plane 2-2 of The instrument body comprises the conducting and terminalrod 10, the sleeve contact and conductor member 11 concentric with the rod 10, and the tubular plug member l2 concentricwith the rod, these parts being all of metal.. These metal yparts arel rigidly supported and ,electrically` insulated from .each other by suitable insulating material 13 such as synthetic resin known to the trade as bakelite The insulating material forms a head orgrip partf14, the inner end of the tubular plug 12 beingfirmly imbedded in the head part of the sleeve contact member being radially expanded. a trifle at the head Appnomon niedneeengber 1s, 192s. serial no. 155,149.

ceiving the tubular 4body 16 of the detachable i tip member, the vend 1Q' of the conductor 10 engaging 1n a sleeve 17 within the tip tube 16, this sleeve being secured to but insulated from the tube by cementitious or other marial 18, the tube and sleeve bein movable as a'whole. A heating loop or filament 19 -is soldered at one end to the tip tube 16 vand at, 1ts other end to a pin 2O extending from the sleeve 17. Preferably the tube 16 is cut away onv the bias to form the pen shaped end 21 to which the filament is soldered. When the ment respectively with the conductor sleeve 11 and rod. 10. p

The end 10` of the rod 10 is preferably threaded and also the sleeve 17 internally, the tip being then more securely held in place. To insure good contact between the tip tube and the contact sleeve 11,- the end 16 of the tip tube` is slightly tapered so that when the tip is applied by the screwing' engagement of the sleeve y17 and rod 10 the tip end will' wedge into the end 11 of the contact sleeve 11 and will not only make a good electrical connection but will also lock the tip in any desired position. To facilitate manipulation and application of the tip, it is provided with the knurled zone 22.

vThe plug, tube 12 serves to secure v the instrument' to a suitable handle structure while the ends o f the rod and sleeve 11 extend be-A Ayond the plug tube for connection with terminals on the handle structure connected with an electrical current supply source. We have shown a handle structure fully disclosed in the co-pending application of Oscar H.

Pieper, Serial No. 136,501 tiled September 20, 1926. Within the tubular shell 23 of this handle structure are the terminal strips 24 and 25 insulated from eachother by insulating material 26. At its upper end the terminal strip 24 has the terminal socket 24 for receiving the end of the contact sleeve 11 of the instrument structure. The plug tube 12 of the instrument structure engages in the .throat 27 of the shell 23 above which throat is the longitudinally split neck 28 threaded on its outside. vAcollar 29 of insulating material has the metallic bushing 30 which is threaded to receive the neck 28.l Within the neck is a split sleeve 31 whose upper and, lower ends are beveled. t0 @Operate Atip member is applied to the 'body member ,c `of the instrument, the tube and sleeve parts 16 and 17 thereof will be in electrical engage- 70 with the beveled surfaces 32 and 33 of the bushing 30 and throat 27 respectively. When an instrument has been applied to the han-v dle structure the collar 29 is turned to draw it down on the neck 28 and to abut the beveled surfaces or sl1oulders32 and 33 against the beveled bushing 31 so that this bushing is contracted to securelygrip the lug tube 12 o f the instrument structure. W enit is desired to remove the structure, the. collar is unscrewed a distance to release the clamping bushing whereupon the instrument may be readily withdrawn. In the handle structure the terminal member 25 is bent to form a switch blade 25 which is normally sprung away from the contact rod 10 of the inserted instrument but which may be bmught into electrical engagement with the rod by means of the button 33 which extends through the sleeve 34 and the slot 35 in the shell 23, the sleeve with the button being thus slideable on the shell. When sleeve 34 is in the lower position shown, the switch blade 25V will be disconnected from the contact rod 10 unless the button 33 is depressed. However, when the sleeve is shifted upwardly, the button will engage with the switch blade to shift it and tohold it in electrical engagement with the terminal rod 10.

After an instrument body is applied to the handle structure the desired tip can be apf plied to the body part and rigidly secured by the threaded engagement with the contact rod l0 and securely locked in adjusted position by the wedge engagement between the tip and the contact sleeve 11. The concentric contact rod and sleeve which are intimately imbedded in and' insulated by the insulating material form a very rigid structure which structure is reinforced by the plug tube 12 and the insulating head or grip part 14.

We claim as follows:

1. In a dental instrument, the combination of a body part and a tip, said body part comprising a central contact and terminal rod, acontact and conductor sleeve concentric with said rod, insulating material support ing said conductor members and insulating them from each other, said conductor sleeve at its outer end forming a terminal socket,

said tip comprising a body part having plug engagement in said socket and a terminal sleeve for said tip for receiving the end .of said conductor rod, and a heat generating member 'connected to said tip frame and sleeve, the outer end of said body part conductor sleeve and rod being adapted for connection with circuit terminals.

2. In a dental instrument structure, the combination of a conductor and terminal rod,

l a terminal and conducting sleeve concentric with said rod but insulated therefrom and forming a plug receiving socket around one end of said rod, a tip having a tubular body forming a plug for engaging in said socket, a sleeve within said plug insulated therefrom and adapted to receive said rod, and an electn'c current operated element connected to 'said tip bod and sleeve. f

3.v In a ental instrument structure, the combination of a sup orting and connecting body and a tip, said ody comprising an innerconductor and terminal member and an outerconductor and terminal member concentric therewith, said conductor members being insulated from each other, said tip comprising a body member having plug engagement in the end of said outer contact member and a terminal sleeve for electrical engagement with said inner contact member, and an electric current operated element connected to said plug body and sleeve.

4. In an electrical dental instrument structure, the combination of a body part comprising inner and outer electrical conductors concentric and insulated from each other, said conductors at one end being adapted for engagement with circuit terminals, the outer member at its other end forming a socket around the inner member, a tip member having plug fit in said socket and having an inner sleeve insulated therefrom and adapted for connection with the inner terminal member,` and an electric current operated element connected with said tip body and said sleeve.

5. In electrical dental instrument structure, a body of insulating material, electrical conductors in the form of an inner rod and a concentric sleeve sup orted by said insulating body, said rod antfsleeve at one end being adapted for connect-ion with an electrical circuit, said sleeve at its other end forming a. socket around the rod, a tip comprising outer and inner terminal members, said outer terminal member having plug lit in said socket and said` inner terminal member being adapted for engagement with said rod, and an electric current operated element connected with said tipterminals.

6. In an electrical dental instrument strucf' ture, the combination lof a conductor rod and a conductor sleeve concentric therewith, insulating material between said rod and sleeve and surrounding said sleeve to form a head, a

. plug tube secured in said head and extending `forming a socket around the adjacent end of said rod, said adjacent end being threaded, a tip structure comprising a tubular body having plug engagement in said socket and a sleeve member within said plug member having threaded engagement with Said rod,

and an electric current operated element connected with said plug member and sleeve.

8. A tip structure for electrical dental instruments comprising a tubular body having its end cut away on the bias to form a point,

ysaid body forming a terminal plug at one end,

an inner terminal member secured to but insulated from said tubular body, and an electric current operated element connected to said inner terminal and said point.

9. In an yelectrical dental instrument structure, the combination with a terminal socket and a terminal rod extending axiallytherein and threaded at its end, oiga. tip structure comprising an outer plug for engaging in said socket and an inner element insulated from said plug element and adapted for-threaded engagement with said terminal rod, "and an f electric current responsive element connect l ed with said tip plug and inner terminal part.

In Witness whereof, We hereunto subscribe our names, this 13th dayof December, 1926.

OSCAR H. PIEPER. CHARLES R. MEITZLER.

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