GB928948A - Improvements in or relating to inspection apparatus - Google Patents

Improvements in or relating to inspection apparatus

Info

Publication number
GB928948A
GB928948A GB135661A GB135661A GB928948A GB 928948 A GB928948 A GB 928948A GB 135661 A GB135661 A GB 135661A GB 135661 A GB135661 A GB 135661A GB 928948 A GB928948 A GB 928948A
Authority
GB
Grant status
Application
Patent type
Prior art keywords
assembly
signals
ball
member
inserts
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
GB135661A
Inventor
Donald Orr Sproule
Richard Gregory South Clarke
Raphael Jacob Wagner
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.)
GLASS DEVELOPMENTS Ltd
Original Assignee
GLASS DEVELOPMENTS 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

Links

Classifications

    • GPHYSICS
    • G01MEASURING; TESTING
    • G01PMEASURING LINEAR OR ANGULAR SPEED, ACCELERATION, DECELERATION, OR SHOCK; INDICATING PRESENCE, ABSENCE, OR DIRECTION, OF MOVEMENT
    • G01P1/00Details of instruments
    • G01P1/12Recording devices
    • G01P1/127Recording devices for acceleration values
    • GPHYSICS
    • G01MEASURING; TESTING
    • G01NINVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
    • G01N29/00Investigating or analysing materials by the use of ultrasonic, sonic or infrasonic waves; Visualisation of the interior of objects by transmitting ultrasonic or sonic waves through the object
    • G01N29/04Analysing solids
    • G01N29/048Marking the faulty objects
    • GPHYSICS
    • G01MEASURING; TESTING
    • G01NINVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
    • G01N29/00Investigating or analysing materials by the use of ultrasonic, sonic or infrasonic waves; Visualisation of the interior of objects by transmitting ultrasonic or sonic waves through the object
    • G01N29/36Detecting the response signal, e.g. electronic circuits specially adapted therefor
    • G01N29/38Detecting the response signal, e.g. electronic circuits specially adapted therefor by time filtering, e.g. using time gates
    • GPHYSICS
    • G01MEASURING; TESTING
    • G01PMEASURING LINEAR OR ANGULAR SPEED, ACCELERATION, DECELERATION, OR SHOCK; INDICATING PRESENCE, ABSENCE, OR DIRECTION, OF MOVEMENT
    • G01P21/00Testing or calibrating of apparatus or devices covered by the preceding groups
    • GPHYSICS
    • G01MEASURING; TESTING
    • G01NINVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
    • G01N2291/00Indexing codes associated with group G01N29/00
    • G01N2291/10Number of transducers
    • G01N2291/101Number of transducers one transducer

Abstract

928,948. Testing assemblies by acoustic analysis. GLASS DEVELOPMENT Ltd., and D. O. SPROULE. Jan. 11, 1962 [Jan. 12, 1961], No. 1356/61. Class 40 (7). In apparatus for inspecting assemblies to ensure that parts within the assemblies which are required to be movable are free to move and that other parts which should be rigidly secured are in fact so, each assembly is subjected to an acceleration and by means of an electro-acoustic transducer, signals derived from sounds produced within the assembly and resulting from such acceleration are compared with a predetermined programme to determine whether or not the assemblies have been correctly manufactured. The embodiment described is concerned with inspecting an assembly comprising a one-way valve which, as shown in Fig. 1, consists of a body part 10, two threaded inserts 15, and 16, which should be immovably assembled with respect to the body 10 and a ball 20 which should be free to move in the insert 15. Fig. 2 shows the inspection apparatus which comprises a motor-driven cam 31 arranged to deflect downwards and then suddenly release a support member 25 secured to a rigid block 26 by means of a flexible member 27 and on which the assembly 29 to be inspected is clamped by means 28. When member 25 is released by the camstep the elasticity of member 27 causes the assembly 29 to move rapidly in an upward direction until it is suddenly brought to rest by means of a stop 33 and any sounds produced within the assembly by this (negative) acceleration are converted into electrical signals by a barium titanate transducer 30 fitted to member 25. Fig. 3 shows the waveform of such signals as displayed on an oscilloscope 34 (Fig. 2). As shown, no signals are produced during the interval 0 to t 1 , this being the period between the instant of release of member 25 and its arrest by means of stop 33. During this interval any relatively movable parts of the assembly undergo movement from their positions of rest. Since free movement (if present, due to incorrect assembly) of either of the inserts 15, 16 must be less than that of the ball 20, looseness of either or both inserts is indicated by a damped sinusoidal wave commencing at t 1 and freedom of the ball by a similar waveform commencing at t 2 and repeating with diminishing amplitude at periods t 3 , t 4 &c. due to rebounds within the counterbore 18. For the assembly to be acceptable there must be no signals produced in the interval t 1- t 2 (i.e. the inserts 15, 16 must not be loose) and signals must be produced during the intervals t 2 -t 3 , t 3 -t 4 &c. (i.e. the ball 20 must be free to move). Fig. 4 shows an arrangement for automatically controlling acceptance or rejection in accordance with the latter requirements of assemblies tested by the apparatus of Fig. 2. In this arrangement three gates G1, G2, G3 are rendered conducting in turn for the respective intervals t 1 -t 2 , t 2 -t 3 and t 3 -t 4 by the output of respective series-connected monostable multivibrators MV1, MV2, MV3. The triggering of the first multivibrator MV1 is effected by a pulse on line I 2 derived from a break contact associated with member 25 and as the gates open in turn the signals from transducer 30 on line I 1 are fed successively to relays KL1, RL2, RL3. If RL1 responds (indicating looseness of either or both of the inserts 15, 16) a " reject " mechanism is operated which overrides operation of the other relays. If RL1 does not respond and RL2 does respond (ball free) an " accept " mechanism is conditioned and the subsequent response of relay RL3 (ball rebound) is utilized to conform such acceptance. Non response of RL2 and/or RL3 likewise operates the " reject " mechanism. In an alternative arrangement for automatic control of the "accept " and " reject " mechanism (Fig. 5, not shown) the signals from transducer 30 are fed to three frequency filters which pass signals characteristic of the respective conditions " inserts loose," " ball free " and " ball rebound " via individual rectifiers to respective relays corresponding to relays RL1, RL2, RL3 of Fig. 4.
GB135661A 1961-01-12 1961-01-12 Improvements in or relating to inspection apparatus Expired GB928948A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
GB135661A GB928948A (en) 1961-01-12 1961-01-12 Improvements in or relating to inspection apparatus

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB135661A GB928948A (en) 1961-01-12 1961-01-12 Improvements in or relating to inspection apparatus

Publications (1)

Publication Number Publication Date
GB928948A true true GB928948A (en) 1963-06-19

Family

ID=9720596

Family Applications (1)

Application Number Title Priority Date Filing Date
GB135661A Expired GB928948A (en) 1961-01-12 1961-01-12 Improvements in or relating to inspection apparatus

Country Status (1)

Country Link
GB (1) GB928948A (en)

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2088114A1 (en) * 1970-05-20 1972-01-07 Dba
US4977778A (en) * 1986-10-29 1990-12-18 Movats Incorporated Check valve testing system
US5154080A (en) * 1986-10-29 1992-10-13 Westinghouse Electric Corp. Integrated check valve testing system
US5159835A (en) * 1986-10-29 1992-11-03 Westinghouse Electric Corp. Check valve testing system

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2088114A1 (en) * 1970-05-20 1972-01-07 Dba
US4977778A (en) * 1986-10-29 1990-12-18 Movats Incorporated Check valve testing system
US5154080A (en) * 1986-10-29 1992-10-13 Westinghouse Electric Corp. Integrated check valve testing system
US5159835A (en) * 1986-10-29 1992-11-03 Westinghouse Electric Corp. Check valve testing system

Similar Documents

Publication Publication Date Title
US3949735A (en) Method and apparatus for an ipsilateral reflex test
US4275744A (en) Auditory response detection method and apparatus
LaSasso et al. The relationship between lexical knowledge and reading comprehension for prelingually, profoundly hearing-impaired students.
US3809811A (en) System for conducting automatically an audiometric test
US4095057A (en) Frequency response testing apparatus
US4233677A (en) Automatic system and method for testing marine streamers of seismic exploration systems
Rastle et al. On the complexities of measuring naming.
Colquhoun Evaluation of auditory, visual, and dual-mode displays for prolonged sonar monitoring in repeated sessions
Baumeister et al. GSR conditioning in normals and retardates.
JPS56110060A (en) Inspecting method and device for base plate of circuit
Egan et al. Source and receiver behavior in the use of a criterion
Acton Speech intelligibility in a background noise and noise-induced hearing loss
US3755627A (en) Programmable feature extractor and speech recognizer
Lisker In qualified defense of VOT
JPS6483742A (en) Vibration controller
US4276445A (en) Speech analysis apparatus
US4652833A (en) Comparator with noise suppression
Ison et al. The relative detectability for mice of gaps having different ramp durations at their onset and offset boundaries
JPS5233791A (en) Method and device for nonndestructive test by eddy current
JPH041570A (en) Automatic analysis apparatus
US3237711A (en) Audiometric testing apparatus
US4445206A (en) Remote acoustic monitoring device which is testable by variation of the supply voltage
Aagaard et al. Transistor Equipment for Continuous Recording of Oriented Migratory Behavior in Birds
GB2179147A (en) Improvements relating to eye-gaze-direction controlled apparatus
Fucci et al. Normative study of oral and non-oral structures using vibrotactile stimuli