US2827535A - Electro-magnetic relays - Google Patents

Electro-magnetic relays Download PDF

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Publication number
US2827535A
US2827535A US500171A US50017155A US2827535A US 2827535 A US2827535 A US 2827535A US 500171 A US500171 A US 500171A US 50017155 A US50017155 A US 50017155A US 2827535 A US2827535 A US 2827535A
Authority
US
United States
Prior art keywords
screw
threaded
contact
adjustment
teeth
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
US500171A
Other languages
English (en)
Inventor
Simons Malcolm
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.)
Telephone Manufacturing Co Ltd
Original Assignee
Telephone Manufacturing Co 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 Telephone Manufacturing Co Ltd filed Critical Telephone Manufacturing Co Ltd
Application granted granted Critical
Publication of US2827535A publication Critical patent/US2827535A/en
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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Classifications

    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
    • H01H1/00—Contacts
    • H01H1/12—Contacts characterised by the manner in which co-operating contacts engage
    • H01H1/14—Contacts characterised by the manner in which co-operating contacts engage by abutting
    • H01H1/34—Contacts characterised by the manner in which co-operating contacts engage by abutting with provision for adjusting position of contact relative to its co-operating contact

Definitions

  • This invention relates to polarised electro-magnetic relays and more particularly to the mounting and adjustment of the contacts of such relays.
  • the hollow member may conveniently be provided with a head in the form of a disc having spur teeth around its periphery which are engaged by the teeth of a small pinion arranged to be turned by a removable key or spanner.
  • the teeth on the disc may pass by an indicator plate provided with a scale or made of a predetermined width, say equal to one and a half pitches of the teeth to enable an adjustment of a predetermined small amount to be made with facility and accuracy.
  • one of the flat surfaces of its head may be engaged by a retaining member which after an adjustment is pressed firmly into contact with the head.
  • the retaining member may thus be carried on a threaded stud which can be turned to move the retaining member into and out of contact with the said head.
  • Figure 1 is a plan of the static contact support and the adjusting mechanism
  • Figure 2 is a central vertical section on the line II-II in Figure l;
  • Figure 3 is a sectional plan on the line IlIIII in Figure 2.
  • the support for the static contact a consists of a rigid mounting arm b of the shape seen in Figure 2. It is provided with a hole tapped with a screw-thread c and in which the tubular adjustment member or sleeve d engages.
  • connection strip g is mounted with its plane at right ang les to, the axis. of screwf, whereby the strip rigidly holds the screw against turning about its axis while allowing the screw to move axially with no substantial restraint.
  • the transverse .crimps in the strip reduce the resistance to axial movement of the screw.
  • the strip g has a connection tab 1 at its fixed end.
  • the pitches of the screwthreads 0, e are such that a complete turn of the hollow member d causes the contact a to be advanced towards or retracted from the moving contact I by 0.0045 inch.
  • the threaded sleeve d has a disc-shaped head m formed with peripheral spur teeth it. These teeth engage those of a small pinion 0 whose spindle is also journalled in the arm b and has an end shaped to be engaged and turned by a removable key or spanner indicated in broken lines at p.
  • the pinion may be fastened to the key and is then removable with it.
  • the teeth n of the head m during adjustment pass close to the edge q of an upturned end I of the arm b and in the example illustrated, the width s of the end is equal to one and a half times the spacing between the points of two adjacent teeth n.
  • the adjustment can be set to one half the pitch of the teeth n.
  • the adjustment of the contact a is 0.00025 inch per tooth.
  • a retaining member is provided arranged to be brought into firm contact with the under surface of the head m.
  • This retaining member consists of a collar 1: on a screw v which is threaded into the supporting arm b.
  • a thin, sheet metal locking plate w forked at its right hand end at x to embrace the screw-threaded part of the hollow member a.
  • An adjustable mounting for an electrical contact comprising a rotatable tubular member screw-threaded internally and externally with threads of different pitches and provided with a disc-shaped head formed with equallyspaced peripheral spur teeth, a fixed mounting arm having an internally screw-threaded transverse hole engaging the external threads of said tubular member, a screw threaded into said tubular member and having a contact element carried at one end thereof, means holding said screw against turning about its axis while allowing axial movement thereof, an indicator plate carried by said mounting arm adjacent said spur teeth and serving thereby to give a measure of the amount of adjustment of said contact, and a movable retaining member carried by said arm in a position to be brought into firm contact with a part of said tubular member to retain the latter in any position to which it is adjusted.
  • said retaining member comprises a screw threaded into said arm and having a flange extending into overlapping relation with the disc-shaped head of said tubular member.
  • An adjustable mounting for an electrical contact comprising a rigid mounting arm having a threaded hole extending transversely through one end portion thereof and a mounting hole through the other end portion, a sleeve threaded into said threaded hole and being internally threaded at a different pitch from the external threads, a'screw threaded into said sleeve and having a contact element carried by one end thereof, a connection strip electrically connected at one end to said contact element and extending laterally away from said screw parallel with said arm and having a mounting hole formed therein in registry With the mounting hole in said mounting arm, and means connecting said connection strip to said screw to hold said screw against rotation about its axis.

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  • Breakers (AREA)
US500171A 1954-05-13 1955-04-08 Electro-magnetic relays Expired - Lifetime US2827535A (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
GB2827535X 1954-05-13
GB14087/54A GB770308A (en) 1954-05-13 1955-05-03 Improvements relating to electromagnetic relays

Publications (1)

Publication Number Publication Date
US2827535A true US2827535A (en) 1958-03-18

Family

ID=32328093

Family Applications (1)

Application Number Title Priority Date Filing Date
US500171A Expired - Lifetime US2827535A (en) 1954-05-13 1955-04-08 Electro-magnetic relays

Country Status (4)

Country Link
US (1) US2827535A (fr)
BE (1) BE537954A (fr)
FR (1) FR1123996A (fr)
GB (1) GB770308A (fr)

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3168633A (en) * 1961-02-13 1965-02-02 Ite Circuit Breaker Ltd Mounting block for adjustable contact rod
US3348009A (en) * 1965-09-27 1967-10-17 Gen Electric Calibration means for temperature responsive device
US3842223A (en) * 1972-05-18 1974-10-15 Lucas Electrical Co Ltd Lever operated switch having adjustable contact gap
US4551597A (en) * 1983-12-19 1985-11-05 Westinghouse Electric Corp. Molded case circuit breaker with adjustable stationary lower electrical contact
US20190378670A1 (en) * 2018-06-08 2019-12-12 Pityu Controls Inc. Adjustable add-on apparatuses for a switch and associated methods

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CH676298A5 (fr) * 1987-07-20 1990-12-28 Schrack Elektronik Ag
JP2892230B2 (ja) * 1992-08-07 1999-05-17 アンデン株式会社 電磁継電器

Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US968358A (en) * 1907-11-19 1910-08-23 Jacobson Brandow Company Adjustment-micrometer for spark-coils.
US2698367A (en) * 1951-04-05 1954-12-28 Edward J Poitras Hermetically sealed externally adjustable thermostatic switch

Patent Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US968358A (en) * 1907-11-19 1910-08-23 Jacobson Brandow Company Adjustment-micrometer for spark-coils.
US2698367A (en) * 1951-04-05 1954-12-28 Edward J Poitras Hermetically sealed externally adjustable thermostatic switch

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3168633A (en) * 1961-02-13 1965-02-02 Ite Circuit Breaker Ltd Mounting block for adjustable contact rod
US3348009A (en) * 1965-09-27 1967-10-17 Gen Electric Calibration means for temperature responsive device
US3842223A (en) * 1972-05-18 1974-10-15 Lucas Electrical Co Ltd Lever operated switch having adjustable contact gap
US4551597A (en) * 1983-12-19 1985-11-05 Westinghouse Electric Corp. Molded case circuit breaker with adjustable stationary lower electrical contact
US20190378670A1 (en) * 2018-06-08 2019-12-12 Pityu Controls Inc. Adjustable add-on apparatuses for a switch and associated methods

Also Published As

Publication number Publication date
BE537954A (fr) 1959-07-03
GB770308A (en) 1957-03-20
FR1123996A (fr) 1956-10-02

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