US3761911A - Shaft dislocation detector - Google Patents

Shaft dislocation detector Download PDF

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Publication number
US3761911A
US3761911A US00223989A US3761911DA US3761911A US 3761911 A US3761911 A US 3761911A US 00223989 A US00223989 A US 00223989A US 3761911D A US3761911D A US 3761911DA US 3761911 A US3761911 A US 3761911A
Authority
US
United States
Prior art keywords
contact
tubular
supporting member
collar
inner end
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 - Lifetime
Application number
US00223989A
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English (en)
Inventor
C Hiltz
G Mount
J Endress
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Individual
Original Assignee
Individual
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Filing date
Publication date
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Application granted granted Critical
Publication of US3761911A publication Critical patent/US3761911A/en
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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Classifications

    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16P—SAFETY DEVICES IN GENERAL; SAFETY DEVICES FOR PRESSES
    • F16P7/00—Emergency devices preventing damage to a machine or apparatus
    • F16P7/02—Emergency devices preventing damage to a machine or apparatus by causing the machine to stop on the occurrence of dangerous conditions therein
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01B—MEASURING LENGTH, THICKNESS OR SIMILAR LINEAR DIMENSIONS; MEASURING ANGLES; MEASURING AREAS; MEASURING IRREGULARITIES OF SURFACES OR CONTOURS
    • G01B7/00—Measuring arrangements characterised by the use of electric or magnetic techniques
    • G01B7/14—Measuring arrangements characterised by the use of electric or magnetic techniques for measuring distance or clearance between spaced objects or spaced apertures

Definitions

  • SHAFT DISLOCATION DETECTOR 7 BACKGROUND OF THE INVENTION
  • Some such devices include a switch with the actuating member thereof positioned to be engaged and operated by some member attached to the shaft upon displacement thereof.
  • a closed pressurized tube has an end located to be abraded away upon displacement of the shaft permitting the fluid pressure to escape and actuate a pressure responsive switch.
  • a tubular contact member is fixedly mounted with its inner end positioned in proximity to an abrading collar carried by the rotating shaft.
  • a second contact overlies the inner end of the tubular contact and is maintained in conductive relation thereto by spring pressure.
  • the second contact is mounted on the inner end of a supporting member slidably mounted in the tubular contact.
  • FIG. 1 is a view showing the orientation of the shaft and detector mechanism
  • FIG. 2 is a lengthwise sectional view of the contact assembly prior to the separation of the contacts thereof by abrading action of the shaft collar;
  • FIG. 3 is a view similar to FIG. 2 showing one of the contacts abraded away as a result of shaft displacement;
  • FIG. 4 is an enlarged view of the second contact of the pair wherein the contact disc is attached to its supporting member by a fusable joint;
  • FIG. 5 is a view taken on line 5-5, FIG. 1.
  • l0 designates a portion of a housing containing a journal bearing 11 and a thrust bearing 12 in which the shaft 13 is journaled.
  • the shaft is provided with a radially extending collar 15, the peripheral surface 17 of which is roughened as by being knurled. This surface, as shown in FIG. 1, extends in angular relation to the axis of the shaft 13, preferably at an angle of 45.
  • a contact assembly 20 is fixedly mounted in the flange 21 of a bracket formed with a second flange portion 22 fixed to the housing 10 as by cap screws 23.
  • the contact assembly includes a first contact structure consisting of a tubular contact member 25 threaded externally for threaded engagement with the flange 21 of the bracket, and a lock nut 27 is provided to secure the member 25 in adjusted position with the inner end thereof in proximity to the peripheral abrading surface 17 of the collar 15.
  • a second contact structure consists of a disc-like portion 30 of conductive material secured to the end of a supporting member in the form of stem 31 which is slidably mounted for axial movement in the tubular member 25.
  • the supporting stem 31 is formed of conductive material and is insulated from the tubular member 25 by an insulating sleeve 33.
  • the inner end portion 35 of the supporting member 31 is of reduced diameter as shown in FIG. 2.
  • the axial length of the supporting stem 31 exceeds the axial length of the tubular member 25, whereby the outer end portion of the supporting member extends outwardly beyond the outer end of the tubular member 25.
  • This extending portion is encircled by an insulating sleeve 37, which in turn is encircled by a helical compression spring 40.
  • a washer 41 of insulating material is positioned between the outer end of the tubular member 25 and the inner end of the spring 40.
  • a cap 43 of insulating material is affixed to the outer end-of the support member 31, as by threaded connection, and is engaged by the outer end of the spring 40.
  • the tubular contact member 25 is mounted in conductive relation to the metal bracket 21, to which a terminal 47 is attached by one of the cap screws 23.
  • a conductor 48 is attached to the outer end of the support member 31.
  • a conductor 49 is connected to the terminal 47.
  • the conductors 48, 49 extend to the controller 50 energizing the driver 51, effecting rotation of the shaft 13.
  • the conductors 48, 49 may also form part of a circuit including an indicator lamp.
  • the mounting bracket for the contact structure 20 is formed, in the portion thereof intermediate the flanges 21, 22, with a stop tab extending in parallel spaced relation to the flange 21.
  • the tab 60 is formed with an aperture for the free passage of the conductor 48. The tab serves as a stop to limit outward movement of the support stem 31 and the cap member 43 carried thereby upon the portion 30 of the second contact being abraded away.
  • the disc 30 may be formed integrally with the conductive support stem 31, or it may be attached thereto by a fusable connection indicated at 57, FIG. 4.
  • the material at 57 may be of a form of a solder which will not fuse at the operating ambient temperature, but will quickly melt by the heat generated by abrading action of the collar 15, resulting in separation of the disc from the support member 31.
  • This detector mechanism embodies, as will be apparent, a very simple construction which may be fabricated at low cost. The various parts of the mechanism do not require precision machining.
  • the circuit 48, 49 is positively opened.
  • the reduced inner end portion 35 of the stem 31 serves to prevent the stem from sticking in the tubular member of the first contact structure, upon the disc being abraded away.
  • the inner end of the stem 31 would be formed with a radial burr which, if the inner end portion of the stem 31 was dimensioned close to the bore in the inner end of the member 25, or to the internal diameter of the insulating sleeve 33, the stem 31, with the burr thereon, might remain in contact with the member 25 with the result that the circuit 48, 49 would not be opened.
  • the bore in the insulating sleeve 33 is slightly larger than the opening in the inner end of the member 25.
  • Detector mechanism for detecting displacement of a rotating shaft from the normal operating position, said mechanism comprising a detector circuit, first and second normally closed contact structures connected in said circuit, a radially extending collar fixed to said shaft, said first contact structure including a tubular contact member of conductive material fixedly mounted with the inner end thereof positioned in proximity to said collar, said second contact structure including a contact portion formed of conductive material, spring means operable to yieldingly maintain said portion in overlying conductive engagement with the inner end of said tubular contact, said collar being movable into abrading engagement with said overlying portion of said second contact structure upon displacement of said shaft from normal operating position, said overlying portion of said second contact structure being severable from said tubular contact member upon such abrading engagement by said collar.
  • Detector mechanism as set forth in claim 2 wherein said supporting member is formed of conductive material and means insulating said supporting member from said tubular contact member.
  • Detector mechanism for detecting displacement of a rotating shaft from normal operating position, said mechanism comprising a detector circuit, first and second normally closed contact structures connected in said circuit, a radially extending collar fixed to said shaft, said first contact structure including a tubular member of conductive material fixedly mounted with the inner end thereof positioned in proximity to said collar, a second contact structure including a supporting member of conductive material mounted in said tubular member for axial movement therein, a contact portion of conductive material fixed to the inner end of said supporting member and overlying the inner end of said tubular member in confronting relation to said collar, said supporting member extending outwardly from the outer end of said tubular member, a cap member fixed to the outer end of said supporting member in axially spaced relation to the outer end of said tubular member, a spring encircling the outer end portion of said supporting member and being disposed intermediate the outer end of said tubular member and said cap, said spring being operable to yieldingly urge said supporting member outwardly of said tubular member to maintain said contact portion of said
  • Detector mechanism as set forth in claim 4 wherein said spring is operable upon severance of said contact portion to move said supporting member outwardly in said tubular member and stop means to limit the outward movement of said support.

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  • Engineering & Computer Science (AREA)
  • General Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Measurement Of Length, Angles, Or The Like Using Electric Or Magnetic Means (AREA)
  • Push-Button Switches (AREA)
  • A Measuring Device Byusing Mechanical Method (AREA)
  • Finish Polishing, Edge Sharpening, And Grinding By Specific Grinding Devices (AREA)
  • Switches With Compound Operations (AREA)
US00223989A 1972-02-07 1972-02-07 Shaft dislocation detector Expired - Lifetime US3761911A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
US22398972A 1972-02-07 1972-02-07

Publications (1)

Publication Number Publication Date
US3761911A true US3761911A (en) 1973-09-25

Family

ID=22838826

Family Applications (1)

Application Number Title Priority Date Filing Date
US00223989A Expired - Lifetime US3761911A (en) 1972-02-07 1972-02-07 Shaft dislocation detector

Country Status (8)

Country Link
US (1) US3761911A (GUID-C5D7CC26-194C-43D0-91A1-9AE8C70A9BFF.html)
JP (1) JPS536860B2 (GUID-C5D7CC26-194C-43D0-91A1-9AE8C70A9BFF.html)
AU (1) AU466580B2 (GUID-C5D7CC26-194C-43D0-91A1-9AE8C70A9BFF.html)
DE (1) DE2304441C3 (GUID-C5D7CC26-194C-43D0-91A1-9AE8C70A9BFF.html)
FR (1) FR2171170B1 (GUID-C5D7CC26-194C-43D0-91A1-9AE8C70A9BFF.html)
GB (1) GB1349230A (GUID-C5D7CC26-194C-43D0-91A1-9AE8C70A9BFF.html)
IT (1) IT971697B (GUID-C5D7CC26-194C-43D0-91A1-9AE8C70A9BFF.html)
NL (1) NL152346B (GUID-C5D7CC26-194C-43D0-91A1-9AE8C70A9BFF.html)

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3853087A (en) * 1973-06-29 1974-12-10 Panhandle Eastern Pipe Line Co Bearing failure indicator
US4006326A (en) * 1974-01-02 1977-02-01 Compagnie Generale Des Etablissements Michelin, Raison Sociale Michelin & Cie Abrasion switch device for detecting low tire pressure
FR2465992A1 (fr) * 1979-09-21 1981-03-27 Sibe Dispositif indicateur d'usure d'axe rotatif, notamment pour carburateur
US4635781A (en) * 1983-02-23 1987-01-13 Peter Morellini Protection apparatus

Families Citing this family (12)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS52112848U (GUID-C5D7CC26-194C-43D0-91A1-9AE8C70A9BFF.html) * 1976-02-21 1977-08-27
US4058079A (en) * 1976-06-10 1977-11-15 Taylor Michael J Movement indicator
GB1593195A (en) * 1976-11-26 1981-07-15 Texaco Development Corp Shaft bearing wear measuring apparatus
DE2807297C3 (de) * 1978-02-21 1982-02-11 MTU Motoren- und Turbinen-Union München GmbH, 8000 München Einrichtung zur elektromechanischen Axialspielmessung
DD139553A1 (de) * 1978-11-09 1980-01-09 Klaus Hertrich Verfahren und vorrichtung zum verhindern der zerstoerung von maschinenteilen
JPS5845638U (ja) * 1981-09-24 1983-03-28 三菱農機株式会社 コンバインにおける籾袋支持装置
JPS58139045U (ja) * 1982-03-13 1983-09-19 三菱農機株式会社 コンバインにおける穀粒ホツパ−支持装置
AU575804B2 (en) * 1983-02-23 1988-08-11 Peter Morellini Protection apparatus
DE3526633A1 (de) * 1985-07-25 1987-02-05 Mauser Werke Oberndorf Schutzeinrichtung einer zustelleinheit
DE9101229U1 (de) * 1991-02-04 1991-04-25 J.M. Voith Gmbh, 7920 Heidenheim Meß- und Anzeige-Vorrichtung
FR2865965B1 (fr) 2004-02-10 2007-11-30 Cebal Sas Procede permettant de decorer en grande cadence des recipients a paroi cylindrique
US8943912B1 (en) * 2010-05-03 2015-02-03 Ken E. Singleton Proximity probe mounting device

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3321045A (en) * 1966-04-11 1967-05-23 Bernard J Veilleux Brake lining sensing device
US3553643A (en) * 1968-09-04 1971-01-05 Edward M Maras Brake lining wear indicator
US3560919A (en) * 1968-11-12 1971-02-02 Armando R Uribe Wear indicating signalling system for a brake lining,or the like

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3321045A (en) * 1966-04-11 1967-05-23 Bernard J Veilleux Brake lining sensing device
US3553643A (en) * 1968-09-04 1971-01-05 Edward M Maras Brake lining wear indicator
US3560919A (en) * 1968-11-12 1971-02-02 Armando R Uribe Wear indicating signalling system for a brake lining,or the like

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3853087A (en) * 1973-06-29 1974-12-10 Panhandle Eastern Pipe Line Co Bearing failure indicator
US4006326A (en) * 1974-01-02 1977-02-01 Compagnie Generale Des Etablissements Michelin, Raison Sociale Michelin & Cie Abrasion switch device for detecting low tire pressure
FR2465992A1 (fr) * 1979-09-21 1981-03-27 Sibe Dispositif indicateur d'usure d'axe rotatif, notamment pour carburateur
US4635781A (en) * 1983-02-23 1987-01-13 Peter Morellini Protection apparatus

Also Published As

Publication number Publication date
NL7300559A (GUID-C5D7CC26-194C-43D0-91A1-9AE8C70A9BFF.html) 1973-08-09
DE2304441B2 (de) 1977-07-14
FR2171170A1 (GUID-C5D7CC26-194C-43D0-91A1-9AE8C70A9BFF.html) 1973-09-21
DE2304441C3 (de) 1978-03-02
NL152346B (nl) 1977-02-15
JPS536860B2 (GUID-C5D7CC26-194C-43D0-91A1-9AE8C70A9BFF.html) 1978-03-11
AU466580B2 (en) 1975-10-30
AU4974672A (en) 1974-06-13
DE2304441A1 (de) 1973-08-16
IT971697B (it) 1974-05-10
JPS4892048A (GUID-C5D7CC26-194C-43D0-91A1-9AE8C70A9BFF.html) 1973-11-29
FR2171170B1 (GUID-C5D7CC26-194C-43D0-91A1-9AE8C70A9BFF.html) 1977-07-22
GB1349230A (en) 1974-04-03

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