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Publication numberUS2226616 A
Publication typeGrant
Publication dateDec 31, 1940
Filing dateOct 13, 1937
Priority dateOct 20, 1936
Also published asDE694707C
Publication numberUS 2226616 A, US 2226616A, US-A-2226616, US2226616 A, US2226616A
InventorsKraus Michael
Original AssigneeKraus Michael
Export CitationBiBTeX, EndNote, RefMan
External Links: USPTO, USPTO Assignment, Espacenet
Electric lighting device for the drill head of a dental drill
US 2226616 A
Abstract  available in
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Claims  available in
Description  (OCR text may contain errors)

M. KRAUS 2,225,616 ELECTR IC LIGHTING DEVICE FOR THE DRILL HEAD OF A DENTAL DRILL- Dec. 31, 1940.

Filed Oct. 15, 1957 lmenlo Patented Dec. 31, 1940 PATENT OFFICE ELECTRIC LIGHTING DEVICE FOR THE DRILL HEAD or A DENTAL DRILL Michael Kraus, Furth, Bavaria, Germany Application October 13, 1937, Serial No. 168,780 In Germany October 19, 1936 1 Claim.

My invention relates to an electric lighting device for the drill head of a dental drill which is provided with a ball joint and an electric lamp being situated on the drill head. The devices hitherto known have the drawback that the electric lamp is arranged on the drill head in an unsatisfactory manner, whereby a sufficient lighting of the tooth to be treated can not be effected without some trouble in handling the device.

According to my invention this drawback is obviated and a lighting device is created, in which he electric lamp is arranged on the front edge of the drill head, so that the cone of light rays is thrown in the longitudinal direction towards the point of the drill during the treatment of the tooth, whereby the place to be treated is surrounded by light.

Further the electric lamp is arranged changeably on the front edge of the drill head.

The ball joint being inserted between the angle bracket shaft and the drill head is insulated.

The current supply to the movable drill head is obtained by a wire being extended along the angle bracket shaft and provided with a sliding contact,

the sliding spring of which is connected with a sliding ring, said ring is fixed to the part of the ball joint which is situated on the drill head.

Further a contact is provided on the upper edge of the drill head which touches a projection 30 of the socket by insertion on the drill head effecting the closing of the circuit.

The accompanying drawing shows my invention by way of example in which Fig. 1 is a side view,

Fig. 2 is a plan view,

Fig. 3 is a front view of the drill head and Figs. 4-8 are details on an enlarged scale.

According to my invention an electric lamp 0 is arranged in the longitudinal direction of the drill b on the front edge of the drill head a which is connected to the prolongated piece of the angle bracket shaft e. An insulated ball joint 3, f is inserted between the angle bracket shaft e and the drill head a. Said ball joint consists of the part i being fixed to the angle bracket shaft e and of the part I being disposed on the drill head a, so that the latter may be turned towards the axis of the angle bracket shaft. The circuit leading to the lamp at the drill head is conducted along the angle bracket shaft and ends in a sliding contact g, the sliding spring of which is connected with a sliding ring it. This ring it, is fixed to the part I and insulated from this part. The current flows through a cable adapted to the bracket shaft to the sliding contact or and through the ring it and a cable connecting this ring it and the contact member Z of the lamp 0. The return circult of current is through the lamp and the body of the drill and the shaft.

The socket d of the lamp 0 is changeably placed on the drill head a, for which purpose two lateral pins i engaging with two guiding sleeves k on the drill head are provided.

The current connection between the drill head a and the lamp socket d is obtained by providing a contact member I which is arranged at the upper edge of the drill head. The socket d carries a projection m which touches the contact member I when the pins are inserted into the guiding sleeves 7c whereby the circuit is closed.

What I claim is:

A dental drill device, comprising a shaft, a turnable angular drill head connected thereto by a ball joint, an electric lamp mounted on the drill head with its axis parallel to the axis of the drill head, thereby to surround the working place with

Referenced by
Citing PatentFiling datePublication dateApplicantTitle
US2539828 *Oct 4, 1946Jan 30, 1951Jerome D GoldisLight attachment for dental drills
US2703995 *Aug 24, 1948Mar 15, 1955Garberding Waldo LCutting tool, including boring bars and the like
US2929918 *Sep 30, 1957Mar 22, 1960William W WittieFuel cell inspection lights
US3023306 *Feb 16, 1959Feb 27, 1962Densco IncIlluminating attachment for dental handpieces
US4542741 *Nov 16, 1983Sep 24, 1985Burgin Kermit HSurgical instrument with incorporated lighting system
US4642738 *Jan 16, 1986Feb 10, 1987Moshe MellerIlluminated dental drill
US4657012 *Apr 1, 1985Apr 14, 1987Burgin Kermit HSurgical instrument with incorporated lighting system
US5797670 *Aug 23, 1996Aug 25, 1998American Industrial Design Co., Inc.Portable power tool light, accessory mounting belt, and method of using same
US6161937 *Dec 26, 1997Dec 19, 2000Rosenstatter; OttoDental handpiece
US8763258Jan 30, 2009Jul 1, 2014Black & Decker Inc.Portable band saw
US20090265943 *Jan 30, 2009Oct 29, 2009Black & Decker Inc.Portable Band Saw
Classifications
U.S. Classification362/119
International ClassificationA61C1/08
Cooperative ClassificationA61C1/088
European ClassificationA61C1/08L