GB177821A - Improvements in or relating to engineers' stethoscopes - Google Patents

Improvements in or relating to engineers' stethoscopes

Info

Publication number
GB177821A
GB177821A GB2857220A GB2857220A GB177821A GB 177821 A GB177821 A GB 177821A GB 2857220 A GB2857220 A GB 2857220A GB 2857220 A GB2857220 A GB 2857220A GB 177821 A GB177821 A GB 177821A
Authority
GB
United Kingdom
Prior art keywords
diaphragm
earpieces
stethoscopes
engineers
sound
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
GB2857220A
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.)
RICHARD BATCHELOR FOORD
Original Assignee
RICHARD BATCHELOR FOORD
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 RICHARD BATCHELOR FOORD filed Critical RICHARD BATCHELOR FOORD
Priority to GB2857220A priority Critical patent/GB177821A/en
Publication of GB177821A publication Critical patent/GB177821A/en
Expired legal-status Critical Current

Links

Classifications

    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01H—MEASUREMENT OF MECHANICAL VIBRATIONS OR ULTRASONIC, SONIC OR INFRASONIC WAVES
    • G01H3/00—Measuring characteristics of vibrations by using a detector in a fluid

Landscapes

  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Measurement Of Mechanical Vibrations Or Ultrasonic Waves (AREA)

Abstract

177,821. Foord, R. B., and Wilson, C. L. Oct. 8, 1920. Stethoscopes.-An instrument for use by engineers and others in detecting irregular running in machinery comprises a diaphragm E stretched between two sound ducts A, A' which communicate by means of tubes K, K<1> with earpieces. The sound ducts A, A<1> comprise two cylinders with tapering ends, and with an inwardly extending flange D on one to which the diaphragm E is secured. A sounding post J is screwed into a socket h on the shorter arm H' of a lever pivoted at g to a bracket carried by one member A and working through a slot in the other member A<1>. The longer arm of the lever is secured to the centre of the diaphragm, so that any vibration of the sounding post J is considerably amplified by the diaphragm E before the sound is transmitted to the earpieces. The earpieces are kept in close contact with the ears by means of a spring N.
GB2857220A 1920-10-08 1920-10-08 Improvements in or relating to engineers' stethoscopes Expired GB177821A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
GB2857220A GB177821A (en) 1920-10-08 1920-10-08 Improvements in or relating to engineers' stethoscopes

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB2857220A GB177821A (en) 1920-10-08 1920-10-08 Improvements in or relating to engineers' stethoscopes

Publications (1)

Publication Number Publication Date
GB177821A true GB177821A (en) 1922-04-10

Family

ID=10277726

Family Applications (1)

Application Number Title Priority Date Filing Date
GB2857220A Expired GB177821A (en) 1920-10-08 1920-10-08 Improvements in or relating to engineers' stethoscopes

Country Status (1)

Country Link
GB (1) GB177821A (en)

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