GB727515A - Improvements in or relating to dental apparatus - Google Patents

Improvements in or relating to dental apparatus

Info

Publication number
GB727515A
GB727515A GB30790/52A GB3079052A GB727515A GB 727515 A GB727515 A GB 727515A GB 30790/52 A GB30790/52 A GB 30790/52A GB 3079052 A GB3079052 A GB 3079052A GB 727515 A GB727515 A GB 727515A
Authority
GB
United Kingdom
Prior art keywords
amplifier
patient
dentist
control circuit
relay
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Expired
Application number
GB30790/52A
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
AKTIEBOLAGNET ELEMA
Original Assignee
AKTIEBOLAGNET ELEMA
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by AKTIEBOLAGNET ELEMA filed Critical AKTIEBOLAGNET ELEMA
Publication of GB727515A publication Critical patent/GB727515A/en
Expired legal-status Critical Current

Links

Classifications

    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61C—DENTISTRY; APPARATUS OR METHODS FOR ORAL OR DENTAL HYGIENE
    • A61C1/00—Dental machines for boring or cutting ; General features of dental machines or apparatus, e.g. hand-piece design
    • A61C1/0007—Control devices or systems
    • A61C1/0015—Electrical systems

Landscapes

  • Health & Medical Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Water Supply & Treatment (AREA)
  • Oral & Maxillofacial Surgery (AREA)
  • Dentistry (AREA)
  • Epidemiology (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Animal Behavior & Ethology (AREA)
  • General Health & Medical Sciences (AREA)
  • Public Health (AREA)
  • Veterinary Medicine (AREA)
  • Dental Tools And Instruments Or Auxiliary Dental Instruments (AREA)

Abstract

727,515. Control of A.C. motors. AKTIEBOLAGET ELEMA. Dec. 4, 1952 [Dec. 4, 1951], No. 30790/52. Class 38 (3) [Also in Group VI] A device for stopping or reducing the speed of rotation of motor-driven dental apparatus under the control of the dentist and/or the patient, comprises an electronic amplifier or oscillation generator or a sensitive relay having an input.or control circuit arranged to include at least a part of the body of the dentist and/or the patient so that a change in the position of the dentist's or patient's body can influence the amplifier, oscillation generator or relay to stop or reduce the speed of rotation of the apparatus. The control circuit comprises a conductor 5 connected with an electrode on a handpiece 8 of the dental engine and the input of an amplifier 4, the amplifier input circuit, a conductor 3 connected with a grid of a valve in the amplifier 4 and an electrode 2 in the arm of a dental chair 1, the control circuit being closed when the patient and the dentist are in contact with one another and their corresponding electrodes. The amplifier 4 is provided with alternating current and a winding 14 of a relay is connected across the output of the amplifier 4. The relay contact 13 and a foot switch 12 are arranged in the main supply circuit to the electric motor 11. The motor is started when the control circuit is completed. In the event of the patient and/or the dentist wishing to stop or slow down the electric motor 11, contact between them or their respective electrodes is broken which reduces the output of the amplifier 4 and breaks the motor circuit at the relay contact 13. If desired, the electrode 2 and the patient may be shunted out of the control circuit by a switch 16 in a conductor 15 connected between the conductor 3 and the link system 6 connecting the electric motor 11 with the handpiece 8.
GB30790/52A 1951-12-04 1952-12-04 Improvements in or relating to dental apparatus Expired GB727515A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
SE727515X 1951-12-04

Publications (1)

Publication Number Publication Date
GB727515A true GB727515A (en) 1955-04-06

Family

ID=20316165

Family Applications (1)

Application Number Title Priority Date Filing Date
GB30790/52A Expired GB727515A (en) 1951-12-04 1952-12-04 Improvements in or relating to dental apparatus

Country Status (1)

Country Link
GB (1) GB727515A (en)

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2492254A1 (en) * 1980-10-16 1982-04-23 Chereau Jacques Automatic selector for dental surgery instruments - uses oscillator to detect if instrument is earthed by operator hand and routes power to required instrument
US4767327A (en) * 1986-09-15 1988-08-30 Smithwick Richard J Dental patient control mechanism
WO2009091848A1 (en) * 2008-01-14 2009-07-23 M2 Partnership Llc Dental patient anxiety and pain management system including isolated hand piece interrupt and reset
EP2845559A1 (en) * 2013-09-06 2015-03-11 Sirona Dental Systems GmbH Control of a device for treating a patient

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2492254A1 (en) * 1980-10-16 1982-04-23 Chereau Jacques Automatic selector for dental surgery instruments - uses oscillator to detect if instrument is earthed by operator hand and routes power to required instrument
US4767327A (en) * 1986-09-15 1988-08-30 Smithwick Richard J Dental patient control mechanism
WO2009091848A1 (en) * 2008-01-14 2009-07-23 M2 Partnership Llc Dental patient anxiety and pain management system including isolated hand piece interrupt and reset
EP2845559A1 (en) * 2013-09-06 2015-03-11 Sirona Dental Systems GmbH Control of a device for treating a patient
DE102013217891A1 (en) * 2013-09-06 2015-03-12 Sirona Dental Systems Gmbh Controlling a device to treat a patient

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