US1001362A - Dental appliance. - Google Patents

Description

C. W. DAVISON.

DENTAL APPLIANCE.

APPLICATION FILED 111111.13, 1911.

1,001,362. Patented Aug. 22, 1911.

W WWJKMA/ZWEMW I COLUMBIA I'LANUUIIAPH cm, WASHINGTON, l). c.

CHARLES W. IDAVISON, OF JEFFERSON CITY, MISSOURI.

DENTAL APPLIANCE.

it comes.

Specification of Letters Patent.

Application filed March 13, 1911.

. Extented Aug. 22, 1911.

Serial No. 614,202.

To all whom it may concern:

Be it known that it, CHARLES \"V. Dawson,- a citizen ot the United States, residing at Jeti'crson City, in the county of Cole and State oil Missouri, have invented certain new and usetul lmprovemcnts in Dental Appliances; and i. do hereby declare the :tiollowing to be a lull, clear, and exact description of the invention, such as will enable others skilled in the art to which it ap nxrtains to make and use the same.

This invention relates to dental appliances and has for its object to produce an apparatus that may be attached to a dental chair and connected to a source of air supply under pressure, for keeping a thin blast of air flowing between the face oli an operator and that of his patient, :for the purpose of preventing each from inhaling the others breath.

To these ends the invention consists in the novel details of construction and combinations oil parts more fully hereinafter described, and particularly pointed out in the claims.

Referring); to the accompanying drawings forming a part of this specification in which like numerals designate like parts in all the views l igure 1 is a perspective view ot a portion of a dental chair with a patient seated therein, and showing; my invention applied to the head-rest and connected to a source of air supply; Fig. 9 is a plan View of my device, detached from the chair; Fig. 3 is an enlarged detail longitudinal sectional view taken on the line 3-45 of Fig. 2; Fig. 4t is an enlarged cross sectional View taken on the line 4- 1: of Fig. 53; Fig. 5 is a View of a modified form of nozzle; Fig. 6 is a view of another modified form of nozzle; and Fig. 7 is a view at a nozzle that is used for supplying; air to the cavity of a patients tooth to keep it dry while being filled.

1 indicates the back of a dental chair provided. with the usual. head-rest 2 to which is attachmh to the arm 3, my improved dental apparatus 4 This apparatus consists of an arm 5 provided at one end with a collar (3 held in any adjusted position on the arm 3 by the set screw 7. The other end of this arm is provided with a collar 8 which rigidly holds screwed therein a small cylinder 9, while 10 indicates a set screw for preventing the cylinder 9 from working, loose. A rod 11 carrying on one end a piston 12 is adapted to operate within the cylinder and be held in an extended position by the spring); .123 located between the end o't said cylinder and said piston.

TH: indicates a head piece provided with a pad 15 and a collar lti which collar is held by a set screw 17 on the other end oi. the rod '11. This rod is also provided with a stop 18 adapted to be adjusted along the screw threaded portion 19, to limit the movement of the optnating parts.

The cylinder 9 is reduced on its outer end. to provide a bearing; 20 tor an arm 91 which arm is tulcrumcd as at and has attached thereto an air tube 23 which tube may be made of a flexible metal, and may be provided with a valve fi-l. Said air tube is preferably of the shape shown; is adapted to extend, when in use, alone the side of a patients taco, and is 'n'ovided at its trout end with a nozzle 25. At its rear end it is turthcr connected to a hose 26 which leads to a source of compressed air supply 27. lfivotally connected to the outer end of the arm 2i is a rod 28 which is pivotally connected to a stud 99 screwed into the piston '12, as clearly shown in Fin. 4. Plaid stud is adapted to travel in the slot 30 in the side of the cylinder 9 when the head piece H- is operated.

The device when not in use. is normally held by the spriny' '13 in the position shown by Full lines in his. 9. When the patients head comes into contact with the head piece H the air pipe 2 is caused to swing upward and inward to the position shown in Fig. 1. its flexibility permits the tube now to be adjusted to the proper position so that a blast of air will not touch the patients taco, but will at the same time prevent the operator and patient lroin inhaling each others breath.

On account of the flexibility of the air tube and the. various adjustments, the device is capable ol delivering a blast of air, from any desired position. in front of a patients :tace. Also of course, any suitable Form of automatic valve may be employed instead ot the valve 94 and the device may he used tor various other kinds of operationsl'or instance. in shaving. massaging. etc.

The dillerent nozzles as shown in Figs. 5 and 6 may be secured to the end of the air pipe to suit dill'erent requirements.

in the modification shown in Fig. 7. the nozzle 31. is made relatively long and flexible so that when it is secured to the end of l. l. t)

the air tube it may be used for insertion into a patients mouth for supplying air to the cavity of a tooth to keep it dry while filling.

From the foregoing, it may be seen that if the above device is used, the offensive odor arising from a decayed tooth or a foul stomach of a person cannot reach the operator.

It is obvious that those skilled in the art may vary the details of construction and arrangement of parts without departing from the spirit of my invention, and therefore, I do not .wish to be limited to such features except as may be required by the claims.

What I claim is 1. In an apparatus of the character described the combination of a chair adapted to support a patient to be operated on; an adjustable spring actuated means connected to said chair comprising a tube and a piston in said tube adapted to deliver a fiat blast of air between the face of said patient and the face of the operator, and thereby prevent each from inhaling the others breath, substantially as described.

In an apparatus of the character described the combination of a chair adapted to support a patient to be operated on; an adjustable spring actuated means connected to said chair comprising a tube adapted to deliver a flat blast of air between the face of said patient and the face of the operator; andmeans connected to said tube adapted to be operated by said patients head for throwing said tube into and out of operative position, substantially as described.

3. In an apparatus of the character described the combination of a chair adapted to support a patient to be operated on; adjustable means connected to said chair comprising a tube adapted to deliver a flat blast of air between the face of said patient and the face of the operator; and a spring actuated rod connected to said tube adapted to be operated by said patient for throwing said tube into and out of operative position, substantially as described.

4. In an apparatus of the character described the combination of a chair, provided with a head-rest, and adapted to support a patient to be operated on; means connected to said head-rest comprising an arm; a cylinder mounted on said arm; a tube connected to said cylinder adapted to deliver a blast of air between the face of said patient and the face of the operator; and a spring actuated rod mounted within said cylinder adapted to be operated by said patient for throwing said tube into and out of operative position, substantially as described.

5. In an apparatus of the character described the combination of a chair, provided with a. head-rest and adapted to supporta patient to be operated on; adjustable means connected to said head-rest comprising an arm; a cylinder mounted on said arm; a lever pivotally connected to said cylinder; a tube mounted on said lever; a spring actuated piston mounted within said cylinder; a rod connecting said lever and said piston; and a means connected to said tube adapted to deliver a blast of air between the face of the patient and the face of the operator, sub stantially as described.

6. In an apparatus of the character described the combination of a support adapted to hold a patient to be operated on; an adjustable sprin actuated means connected to said support comprising a bent flexible tube; a flexible nozzle mounted on one end of said tube; a means adapted to be operated by the patients head for throwing said tube into and out of operative position; and a means connected to said tube for delivering a blastof air thereto, substantially as described.

In testimony whereof, I afliX my signature, in presence of two witnesses.

CHARLES W. DAVISUN.

Witnesses:

E. ARTHUR Veer, BALTHASAR LOETHEN.

Copies of this patent may be obtained for five cents each, by addressing the Commissioner of Patents, Washington, D. C.

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