SE359224B - - Google Patents

Info

Publication number
SE359224B
SE359224B SE284769A SE284769A SE359224B SE 359224 B SE359224 B SE 359224B SE 284769 A SE284769 A SE 284769A SE 284769 A SE284769 A SE 284769A SE 359224 B SE359224 B SE 359224B
Authority
SE
Sweden
Prior art keywords
endoscope
source
light unit
endoscopic apparatus
current
Prior art date
Application number
SE284769A
Inventor
J Blackett
Original Assignee
Matburn Ltd
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 Matburn Ltd filed Critical Matburn Ltd
Publication of SE359224B publication Critical patent/SE359224B/xx

Links

Classifications

    • H—ELECTRICITY
    • H03—ELECTRONIC CIRCUITRY
    • H03K—PULSE TECHNIQUE
    • H03K3/00—Circuits for generating electric pulses; Monostable, bistable or multistable circuits
    • H03K3/02—Generators characterised by the type of circuit or by the means used for producing pulses
    • H03K3/26—Generators characterised by the type of circuit or by the means used for producing pulses by the use, as active elements, of bipolar transistors with internal or external positive feedback
    • H03K3/28—Generators characterised by the type of circuit or by the means used for producing pulses by the use, as active elements, of bipolar transistors with internal or external positive feedback using means other than a transformer for feedback
    • H03K3/281—Generators characterised by the type of circuit or by the means used for producing pulses by the use, as active elements, of bipolar transistors with internal or external positive feedback using means other than a transformer for feedback using at least two transistors so coupled that the input of one is derived from the output of another, e.g. multivibrator
    • H03K3/282—Generators characterised by the type of circuit or by the means used for producing pulses by the use, as active elements, of bipolar transistors with internal or external positive feedback using means other than a transformer for feedback using at least two transistors so coupled that the input of one is derived from the output of another, e.g. multivibrator astable
    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
    • A61B1/00—Instruments for performing medical examinations of the interior of cavities or tubes of the body by visual or photographical inspection, e.g. endoscopes; Illuminating arrangements therefor
    • A61B1/00002—Operational features of endoscopes
    • A61B1/00004—Operational features of endoscopes characterised by electronic signal processing
    • A61B1/00006—Operational features of endoscopes characterised by electronic signal processing of control signals
    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
    • A61B1/00—Instruments for performing medical examinations of the interior of cavities or tubes of the body by visual or photographical inspection, e.g. endoscopes; Illuminating arrangements therefor
    • A61B1/06—Instruments for performing medical examinations of the interior of cavities or tubes of the body by visual or photographical inspection, e.g. endoscopes; Illuminating arrangements therefor with illuminating arrangements
    • A61B1/0661—Endoscope light sources
    • A61B1/0676—Endoscope light sources at distal tip of an endoscope
    • H—ELECTRICITY
    • H03—ELECTRONIC CIRCUITRY
    • H03K—PULSE TECHNIQUE
    • H03K3/00—Circuits for generating electric pulses; Monostable, bistable or multistable circuits
    • H03K3/02—Generators characterised by the type of circuit or by the means used for producing pulses
    • H03K3/26—Generators characterised by the type of circuit or by the means used for producing pulses by the use, as active elements, of bipolar transistors with internal or external positive feedback
    • H03K3/28—Generators characterised by the type of circuit or by the means used for producing pulses by the use, as active elements, of bipolar transistors with internal or external positive feedback using means other than a transformer for feedback
    • H03K3/281—Generators characterised by the type of circuit or by the means used for producing pulses by the use, as active elements, of bipolar transistors with internal or external positive feedback using means other than a transformer for feedback using at least two transistors so coupled that the input of one is derived from the output of another, e.g. multivibrator
    • H03K3/282—Generators characterised by the type of circuit or by the means used for producing pulses by the use, as active elements, of bipolar transistors with internal or external positive feedback using means other than a transformer for feedback using at least two transistors so coupled that the input of one is derived from the output of another, e.g. multivibrator astable
    • H03K3/2823—Generators characterised by the type of circuit or by the means used for producing pulses by the use, as active elements, of bipolar transistors with internal or external positive feedback using means other than a transformer for feedback using at least two transistors so coupled that the input of one is derived from the output of another, e.g. multivibrator astable using two active transistor of the same conductivity type

Landscapes

  • Life Sciences & Earth Sciences (AREA)
  • Health & Medical Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Surgery (AREA)
  • Biophysics (AREA)
  • Medical Informatics (AREA)
  • Nuclear Medicine, Radiotherapy & Molecular Imaging (AREA)
  • Optics & Photonics (AREA)
  • Pathology (AREA)
  • Radiology & Medical Imaging (AREA)
  • Power Engineering (AREA)
  • Biomedical Technology (AREA)
  • Heart & Thoracic Surgery (AREA)
  • Physics & Mathematics (AREA)
  • Molecular Biology (AREA)
  • Animal Behavior & Ethology (AREA)
  • General Health & Medical Sciences (AREA)
  • Public Health (AREA)
  • Veterinary Medicine (AREA)
  • Signal Processing (AREA)
  • Endoscopes (AREA)
  • Instruments For Viewing The Inside Of Hollow Bodies (AREA)

Abstract

1,191,414. Supply systems for endoscopic apparatus. MATBURN (HOLDINGS) Ltd. 28 Feb., 1969 [5 March, 1968; 16 Aug., 1968], Nos. 10558/68 and 39315/68. Heading H2H. A supply system for an endoscopic apparatus includes means whereby the light unit of the endoscope is fed with current at a frequency greater than 15 K.Hz. An endoscope 1 is provided with a light unit 2 at one end, the light being supplied from an A.C. source LN by way of a transformer-rectifier combination, a transistor oscillator, the output frequency of which is greater than 15 K.Hz, and a step down transformer T2. A indicating lamp PL1 is provided and the supply current may be adjusted by a variable resistor RV1. In a second embodiment the source of electricity is a battery.
SE284769A 1968-03-05 1969-03-03 SE359224B (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
GB3931568A GB1191414A (en) 1968-03-05 1968-03-05 Endoscopic Supply Unit.
GB1055868 1968-03-05

Publications (1)

Publication Number Publication Date
SE359224B true SE359224B (en) 1973-08-27

Family

ID=26247601

Family Applications (1)

Application Number Title Priority Date Filing Date
SE284769A SE359224B (en) 1968-03-05 1969-03-03

Country Status (5)

Country Link
JP (1) JPS4831556B1 (en)
DE (1) DE1910810C3 (en)
FR (1) FR2003235A1 (en)
GB (1) GB1191414A (en)
SE (1) SE359224B (en)

Families Citing this family (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3595221A (en) * 1969-03-04 1971-07-27 Matburn Holdings Ltd Endoscopic having illumination supply unit
JPS5078863A (en) * 1973-11-16 1975-06-26
JPS6273793A (en) * 1985-09-27 1987-04-04 山水電気株式会社 Printed circuit board
JPS6381897A (en) * 1986-09-25 1988-04-12 日本シイエムケイ株式会社 Printed wiring board
CN111990945B (en) * 2020-09-17 2023-03-14 河南省中医院（河南中医药大学第二附属医院） Anorectal department endoscope signal management system

Also Published As

Publication number Publication date
FR2003235A1 (en) 1969-11-07
JPS4831556B1 (en) 1973-09-29
GB1191414A (en) 1970-05-13
DE1910810B2 (en) 1974-08-29
DE1910810A1 (en) 1969-10-02
DE1910810C3 (en) 1975-04-10

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