US2896048A - Sensitive relay - Google Patents

Sensitive relay Download PDF

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Publication number
US2896048A
US2896048A US671010A US67101057A US2896048A US 2896048 A US2896048 A US 2896048A US 671010 A US671010 A US 671010A US 67101057 A US67101057 A US 67101057A US 2896048 A US2896048 A US 2896048A
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US
United States
Prior art keywords
spring
springs
relay
contact
combination
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
US671010A
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English (en)
Inventor
Fredric E Wood
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.)
General Telephone Laboratories Inc
Original Assignee
General Telephone Laboratories Inc
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
Priority to BE566773D priority Critical patent/BE566773A/xx
Application filed by General Telephone Laboratories Inc filed Critical General Telephone Laboratories Inc
Priority to US671010A priority patent/US2896048A/en
Application granted granted Critical
Publication of US2896048A publication Critical patent/US2896048A/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
    • H01H50/00—Details of electromagnetic relays
    • H01H50/54—Contact arrangements

Definitions

  • a feature of the invention is the provision of a relay having fast-to-release characteristics in addition to sensitive adjustment.
  • a further feature of the relay as set out herein is that the relay contact springs will open on deenergization of the relay coil with a minimum of contact vibration.
  • the invention relates to relays of the type shown in U.S. Patent 2,401,213, issued to F. E. Wood on May 28, 1946.
  • Fig. 1 shows a top view of the relay.
  • Fig. 2 shows a side view and Fig. 3, a view of the other side of the relay.
  • the relay structure in general as regards the coil, armature and heelpiece mechanisms is generally the same as that shown in the cited Wood patent.
  • a special coil with a small diameter nickel iron core having an enlarged pole face 114 is incorporated to further increase the sensitivity of the relay.
  • the contact springs 226 and 227 of Fig. 2 and 326 and 327 of Fig. 3 are of the same shape and design shown in the cited Wood patent. Springs 226 and 227 form a make-combination and comprise what will be considered as the right spring pileup under washer 222. Springs 326 and 327 form a break-combination and are included under washer 322 into the left pileup.
  • the right pileups consists of a number of insulators 120, movable contact spring 227, movable adjusting spring 217, another insulator 120, stationary contact spring 226, insulators 120, stationary adjusting spring 216, insulator 120 and washer 222.
  • the left pileup provides a break-combination formed by insulators 120, back contact spring 326, an insulator 120, movable spring 327, adjusting spring 317 for the movable spring 327, insulators 120, adjusting spring 316 for the back contact spring 326, insulator 120 and washer 332.
  • the sensitive adjustment for both pileups is controlled from the U shaped bracket 111 which is mounted to heelpiece 116 through support bushing 129 which has knurled top and bottom surfaces to provide firm contacting surfaces.
  • the bracket has tapped holes in each arm of the U to receive the adjustment screws 211, 213, 311 and 313.
  • the screws are mounted in parallel alignment through the tapped holes so that each of the screws is adjacent one of the adjusting springs.
  • Each of these screws has a phenolic insulator 212, 214, 312 and 314 set into its spring contacting end and a slot at its further end.
  • contact pressure is obtained by deflecting the movable spring. Since the spring is long and is mounted in cantilever fashion, it cannot be ac- 2,896,048 Patented July 21, 1959 curately positioned by this manual adjustment. Also, a considerable portion of the relay stroke is wasted in deflecting the spring to obtain the required contact pressure.
  • Micrometer screw 211 acts in combination with nickelsilver tension spring 213 to govern the restoring force of movable contact spring 227. Advance of screw 211 forces the tension spring toward the heelpiece. This force tends to bow contact spring 227 toward the heelpiece and increase the restorative force on contact spring 227.
  • the micrometer adjusting screw 211 is insulated from the tension spring 217 by the phenolic tip 212 embedded into the leading end of screw 211.
  • This stop spring is made of a heavier gauge metal than are the remaining springs.
  • This screw and stop spring adjustment regulate the contact gap between the stationary spring and the movable spring.
  • Advancing screw 213 forces the free end of stop spring 216 against the stationary make spring 226 reducing the contact gap.
  • the stop spring 216 also has a secondary function. Near its free end, the stop spring 216 rests against the stationary spring 226 at a line of contact about a quarter of an inch inward of the spring contacts. The armature spring then has only this quarter of an inch of free length which is free to flex during relay operation and a large amount of contact pressure can therefore be generated in the spring combination.
  • the armature spring 227 When the armature spring 227 is deflected, it contacts make spring 226 and forces the outward end of the make spring against the stop spring. In this manner a high contact pressure may be developed. Further, the stop spring may be adjusted so that the fully operated position of the relay is achieved with the armature not fully against the coil core 114. An adjustment of this type would provide a quick-to-release relay.
  • the contacts of Fig. 3 constitute a break-combination.
  • Tension spring 317 acts against the armature spring 327 to provide the spring tension and contact pressure.
  • This tension spring is made of light gauge nickel silver material.
  • Brass stop spring 316 varies the relative position of back contact spring 326 to vary the contact gap. Further, due to the fact that the contact springs although mounted in the pileups as cantilever springs are supported along their free lengths by the stop springs, vibration of the contact springs can occur only along the exposed portion of their length. Thus vibratory contacting will be stopped rapidly and the vibrations will be of small amplitude.
  • each contact spring of the relay is capable of being adjusted to close tolerances.
  • a relay having a heelpiece, an armature pivotally mounted to one end of said heelpiece, a plurality of contact springs mounted to said other end of said heelpiece, two of said springs combinedly forming a make combination including a stationary spring and a movable spring, said movable spring actuated by pivoting of said armature to impinge against said stationary spring, a first adjusting spring acting on said movable spring for increasing or decreasing the tension in said movable spring, said first adjusting spring formed of a light gauge spring material, a second adjusting spring acting on said stationary spring for changing the contact separation distance between said springs, said second adjusting spring formed of a rigid spring material to arrest the momentum imparted to said stationary spring by impingement thereagainst by said movable spring to thereby damp out vibrations of said stationary spring, a U-shaped bracket aifixed transversely to said heelpiece, individual control means advanceably and retractably mounted through the legs of said U shaped bracket, each of said control means aligned in parallel relationship
  • each of said combinations comprising a movable spring and a stationary spring, an armature arm for actuating each of said movable springs, the movable spring of said make-combination moved toward the stationary spring of said make-combination on actuation of the armature arm, the movable spring of said breakcombination moved away from said stationary spring on actuation of the armature, a tension spring tactually adjacent each of said movable springs for adjusting the tension thereof, a cantilever spacing spring tactually adjacent each of said stationary springs, the spacing spring adjacent the stationary spring of said make-combination adjustably maintaining the separation distance between the springs of said make-combination in the normal state, the spacing spring adjacent the stationary spring of said break-combination adjustably maintaining the separation between the springs of said break-combination as actuated by said armature, both said spacing springs of rigid construction to damp out excess motion of said stationary spring

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  • Physics & Mathematics (AREA)
  • Electromagnetism (AREA)
  • Springs (AREA)
US671010A 1957-07-10 1957-07-10 Sensitive relay Expired - Lifetime US2896048A (en)

Priority Applications (2)

Application Number Priority Date Filing Date Title
BE566773D BE566773A (en, 2012) 1957-07-10
US671010A US2896048A (en) 1957-07-10 1957-07-10 Sensitive relay

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
US671010A US2896048A (en) 1957-07-10 1957-07-10 Sensitive relay

Publications (1)

Publication Number Publication Date
US2896048A true US2896048A (en) 1959-07-21

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Family Applications (1)

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US671010A Expired - Lifetime US2896048A (en) 1957-07-10 1957-07-10 Sensitive relay

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US (1) US2896048A (en, 2012)
BE (1) BE566773A (en, 2012)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3265824A (en) * 1963-07-29 1966-08-09 Ducellier & Cie Electromagnetic circuit breakers
US3525059A (en) * 1968-05-06 1970-08-18 Square D Co Electromagnetic contactor

Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US1108320A (en) * 1913-05-10 1914-08-25 Albert E Berdon Electric-current-controlling apparatus.
US1121897A (en) * 1913-09-23 1914-12-22 Western Electric Co Relay.
US1496783A (en) * 1920-12-22 1924-06-10 Western Electric Co Electrical relay
US2075499A (en) * 1936-01-11 1937-03-30 Bell Telephone Labor Inc Switching device
US2399123A (en) * 1943-09-15 1946-04-23 Dominion Electrical Mfg Inc Quick-action mechanism
US2598519A (en) * 1950-03-22 1952-05-27 Nat Pneumatic Co Inc Circuit controlling apparatus
US2741675A (en) * 1952-10-22 1956-04-10 Holmes Electric Protective Com Vibration detecting device

Patent Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US1108320A (en) * 1913-05-10 1914-08-25 Albert E Berdon Electric-current-controlling apparatus.
US1121897A (en) * 1913-09-23 1914-12-22 Western Electric Co Relay.
US1496783A (en) * 1920-12-22 1924-06-10 Western Electric Co Electrical relay
US2075499A (en) * 1936-01-11 1937-03-30 Bell Telephone Labor Inc Switching device
US2399123A (en) * 1943-09-15 1946-04-23 Dominion Electrical Mfg Inc Quick-action mechanism
US2598519A (en) * 1950-03-22 1952-05-27 Nat Pneumatic Co Inc Circuit controlling apparatus
US2741675A (en) * 1952-10-22 1956-04-10 Holmes Electric Protective Com Vibration detecting device

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3265824A (en) * 1963-07-29 1966-08-09 Ducellier & Cie Electromagnetic circuit breakers
US3525059A (en) * 1968-05-06 1970-08-18 Square D Co Electromagnetic contactor

Also Published As

Publication number Publication date
BE566773A (en, 2012)

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