US1387329A - Drill-paralleler - Google Patents

Description

W. STARK.

DRILL PARALLELER.

APPLICATION FILED MAY6.1920.

Patented Aug. 9, 1921.

WEcark.

vwewboz Gbtowl a? UNITED STATES PATENT, OFFICE.

WALTER STARK, or AUBURN, CALIFORNIA.

DRiLL-PARALLELER.

an improved device; especially adapted for use in connection with dental engine hand pieces which is so constructed that cavities for inlays or pin teeth forlabutments can be bored in direct parallel relation and thereby permit of the finished inlay or bridge to go easily and firmly in place.

Another object of the invention is to pro- 'vide an improved drill attachment for den- -the drillparalleler showing the means of tal work in Which the drill, bur or the like, will be held in such a manner that the cav- .ity being made for bridge work orthe like cessive ones,

A further object ofthe invention is to pro? vide an improved device which will effecwill be parallel: to all previous or all suctively permit the'bur, drill or the like to be 1 swung in a horizontal and a vertical plane and still remainparallel to a cavity bored and thereby'permit of other cavities being bored in parallel-relation to the first cavity.

'A further object of the invention is to provide an improved device for drillingiparallel cavities which can ,be readily and I quickly attached to or'detached from an engine hand piece and which will allow a firm hold to be obtainedon the hand piece and ,permit the hand ,pieceto be used in'the ordinary manner.

-A further ob ect of the invention is the provision of an improved drill paralleler embodying a series of. joints all working on the same plane of action, a pair of parallel arms working in a plane at right anglesto the joints, and an anchored handle, the parallel arms carrying spring means for detachably engaging an engine handipiece.

A still further object of: the invention is to provide an improved drill. attachment of the above character ,which is, durable and efficient in-use, onfethat issimple and easy specificationof Letters Patent. Patented Aug, 9, 192 1,

' Application. filed May 6, 1920. Serial No. 379,416.' a i to manufacture, and onewhich can be placed upon the market at a reasonable cost.

VV'ith these and other objects in view, the invention consists in the novel construction, arrangement and formation of parts as will be hereinafter more specifically described, claimed and illustrated in the accompanying drawings, forming a part of this specification, in which drawings:

Figure 1 is a perspective view of the improved drill paralleler attached to an engine hand piece and showing the same in operation.

Fig. 2 is a plan view of the improved drill paralleler.

. Fig. 3 is a fragmentary vertical section through the drill 'parall'eler.

Fig. 4 is a detail horizontal section through connecting the anchorage handle to the joints, and Y Fig. 5 is a fragmentary vertical section similar to Fig. 3 showing the arms arranged portion E.

The anchorage portion C comprises a cylindrical handle 10, the outervsurface of which is serrated or milled so that a firm grip may be obtained thereon so as to pre- 1 vent the slipping of the same when in use.

The inner end of the handle 10 is provided withv a reduced extension llwhich is adapt- .edtobe secured to the horizontally swinging portion D. The horizontally swinging por- ;tion D includes a plurality of joints 12 each of which includes upper and lower flat plates 13 and 14 which are pivotally secured by means of vertically disposed pins 15 to solid pieces 16 which are arrangedinterme- 'diatethe upper and lower plates 13'and 14. I

The upper and lower plates 13 and 14 forming the terminals of the joints 12 are pivotally secured to outwardly extending solid members 17 and 18. The body 17 is provided with an inwardly extending bore 19 which receives the reduced extension 11 formed on the handle 10 and the extension is held against displacement on the body 17 by means of a removable fastening element 20. The end member 18 has its outer end reduced in thickness and attached to the vertically swinging portion E.

The vertically swinging portion E comprises a pair of parallel arms 21 and 22, the terminals of which are mounted on horizontal pivots 23 which are secured in the slotted portions of pairs of upper and lower heads 24 and 25. The pairs of upper and lower heads 24 and 25 are detachably connected together as at 26 and have outwardly extending annular flanges 2'7 for a purpose which will hereinafter more fully appear.

The reduced portion of the end member 18 is provided with an opening which is adapted to receive the inner end of'the vertically swinging portion E and this connection permits the vertically swinging portion E to swing in a horizontal plane on the end member 18 and the flanges 27 engage the upper and lower surfaces of the end member. The outer portions of the vertically swinging portion E carries for movement in a horizontal plane the spring clamp 28 and the annular flanges 27 carried by the vertically swinging portion engage the upper and lower surface of the shank 29 formed on the spring clamp. Y p

The spring clamp 28 includes the shank 29 and the outwardly extending semi-circular jaws 30 which are adapted to engage around the engine hand piece B. One of the jaws 30 is provided with an inwardly extending pit 31 which is adapted to engage in the ordinary oil hole formed in the enginehand piece B. x

In use of the improved device, the handle 10 is firmly held by the operators assistant or held in the left hand of the operator while the engine hand piece is held and operated in the usual manner. If so desired the hand may be rested lightly upon the face of the patient, so that movement of the handle out of correct position will be prevented. After one cavity has been bored in a tooth it is merely necessary to raise the hand piece and swing the same on a horizontal pivot to the next tooth which is to be bored. Owing to the arms 21 and 22 which always remain in parallel relation, when the hand piece is moved downwardly to the bore of the next hole, the same will'be bored in direct parallel relation to the first hole bored.

From the foregoing description it can be seen that an improved device is provided for the hand pieces of dental engines which'will effectively permit cavities for the pin teeth of bridge abutment to be bored in direct parallel relation to each other.

' Changes in details may be made without departing from the spirit or scope of the invention, but, 1

I claim:

1. A device for drilling holes in parallel relation comprising an anchorage portion, a plurality. of horizontally swinging joints carried by the anchorage portion, a vertically swinging portion carried bythe horizontally swinging joints, and means carried by the vertically swinging portion for engagin a tool.

2. X tool attachment comprising an anchorage handle, a plurality of horizontally swinging joints, a pair of vertically swinging parallel arms carried by the horizontally swinging portions, and a horizontally swinging clamp carried by the vertically swinging parallel arms. i

3. The combination with an engine hand piece, of'an attachment therefor comprising an anchorage handle, a plurality of horizontally swinging joints carried by the handle, a pair of vertically swinging parallel arms carried by the horizontally swinging portion, and a spring clamp carried by the parallel swinging arms arranged: to engage the hand piece.

4. The combinationwiththe hand a dental engine, of an attachment therefor including an anchorage handle, aplurality of horizontally swinging joints, a pair of parallel armscarried by the horizontally swinging joints and arranged formovement in a vertical plane, and means carried by the parallel arms formovement in a horizontal plane for detachably engaging the hand piece of the engine.

5. The combination withthe hand piece of a dental engine, of an attachment therefor including an anchorage'handle, a plurality of joints arranged for movement in the same plane, a pair of spaced parallel arms carried by the joints and arranged for movement in a plane at right angles to the movement of the'joints, and a clamp movably carried by the parallel arms for detachably engaging the hand piece. 1

6. The combination with the hand piece of a dental engine, of an attachment therefor including an anchorage handle, a plurality of joints carried by the handle and arranged for movement in the'same'plane, a pair of spaced parallel arms arranged for movement in a planev at right angles to the joints, a spring clamp carried bythe outer end of the parallel arms arranged for movement in a plane at right angles to the plane of movement of the arms, the clamp being adapted to detachably engage the hand piece.

7. The combination with'a dental engine piece of hand piece having an oil 'hole'therein, of an attachment therefor comprising a cylindriner head to thejoints, the parallel arms arcal handle adapted to be engaged by one ranged to swing in-a plane at right angles to hand of the operator, a plurality of joints the joints, a spring clamp carried by the 10 secured to the handle and arranged for outer head and an inwardly extending tit movement in the-same plane, pairs of spaced formed on the clamp arranged to engage in slotted heads, parallel arms pivotally sesaid oil hole.

cured to the heads, means connecting the in- WALTER STARK.

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