US3333216A - Unencapsulated reed contact relay - Google Patents

Unencapsulated reed contact relay Download PDF

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Publication number
US3333216A
US3333216A US499800A US49980065A US3333216A US 3333216 A US3333216 A US 3333216A US 499800 A US499800 A US 499800A US 49980065 A US49980065 A US 49980065A US 3333216 A US3333216 A US 3333216A
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United States
Prior art keywords
relay
armature
springs
core
magnetic
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
US499800A
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English (en)
Inventor
Rudolph F Stehlik
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.)
Automatic Electric Laboratories Inc
Original Assignee
Automatic Electric Laboratories Inc
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Filing date
Publication date
Application filed by Automatic Electric Laboratories Inc filed Critical Automatic Electric Laboratories Inc
Priority to US499800A priority Critical patent/US3333216A/en
Priority to BE688311D priority patent/BE688311A/xx
Application granted granted Critical
Publication of US3333216A publication Critical patent/US3333216A/en
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
    • H01H50/00—Details of electromagnetic relays
    • H01H50/02—Bases; Casings; Covers
    • H01H50/04—Mounting complete relay or separate parts of relay on a base or inside a case
    • H01H50/047—Details concerning mounting a relays
    • H01H50/048—Plug-in mounting or sockets
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
    • H01H50/00—Details of electromagnetic relays
    • H01H50/54—Contact arrangements
    • H01H50/56—Contact spring sets

Definitions

  • An electromagnetic relay with a housinghaving first and second interlocking portions. Within the first portion, about which there is wound an operating coil, there is mounted a magnetic core and contact sets comprising make and break" springs with V-shaped contact areas and armature springs with circular contact areas. The free ends of the contact springs and magnetic core extend into .the second housing portion, which itself comprises two interlocking sections between which there is mounted an armature and an armature cam to operate the contact springs.
  • each set of contact springs protrude into a chamber-like opening, formed when the sections of the second portion are interlocked, and each opening includes a back stop and .a shoulder portion upon which the make and break springs rest, respectively, to prevent bounce.
  • the first and second housing portions are maintained interlocked 'by means of a magnetic coupling strip attached thereto, which also serves as a magnetic return path between the relay armature and core.
  • This invention relates to relays and in particular to plugin relays having unencapsulated contact springs protected by an outer housing.
  • the relay according to the present invention is, in a way, an improved alternative to the aforementioned dry reed relay, and it may be used in connection with a printed circuit matrix of a design similar to that shown in the above patent although many other uses are also possible.
  • Another object of the invention is the provision of a relay permitting the use of a variety of spring combinations rather than mere makes as in conventional dry reed relays.
  • Another object of the invention is to provide a relay, the springs of which are independent of the armature of the relay, and are accessible at any time for adjuting without interference with the armature adjustment.
  • Still another object of the invention is to provide a relay which can be used in conjunction with a printed circuit card and, more particularly, a printed circuit matrix card.
  • a feature of this invention is an interlocking housing which comprises the outer closure of the'relay according to the invention.
  • Another feature of the invention is a strip which has a two fold purpose of: (1) providing a spring for maintaining the housing portions of the relay according to the invention in an interlocking relation and (2) providing a magneticreturn path for the magnetic circuit of the relay according to the invention.
  • Still another feature of the relay according to the invention is that a portion of its housing receives the free ends of the springs to provide individual chambers for each set of springs and supports for dampening oscillations of the springs during operation.
  • Another feature of the relay according to the invention is the V-shape of the break and make springs at their contact areas and the circular contact area on the armature springs which fit into the V-shaped make and break springs to insure adequate contact mating.
  • FIG. 1 is a top view of a preferred embodiment of a relay according to the invention.
  • FIG. 2 is a side view of the relay of FIG. 1.
  • FIG. 3 is a sectioned View of the relay of FIG. 1 along the line 3--3.
  • FIG. 4 is a top view of the upper section of the right hand interlocking portion of the relay shown in FIG. 3.
  • FIG. 5 is a front view of the section of FIG. 4.
  • FIG. 6 is a top view of the lower section of the right hand interlocking portion of the relay shown in FIG. 3.
  • FIG. 7 is a rear view of the section of FIG. 6.
  • FIG. 8 is a front view of the section of FIG. 6.
  • FIG. 9 is a front view of the armature cam of the relay of FIG. 3 according to the invention.
  • FIG. 10 is a top view of the armature cam of FIG. 9.
  • FIG. 11 is a top view of the armature of the relay of FIG. 3 according to the invention.
  • FIG. 12 is a top view of the core of the relay of FIG. 3 according to the invention.
  • FIG. 13 is a side view of the magnetic return strip of the relay of FIG. 3 according to the invention.
  • FIG. 14 is a top view of the magnetic return strip of FIG. 13.
  • FIG. 15 is a sectioned view of the magnetic return strip of FIG. 13 along the line 15-15.
  • FIG. 16 is sectioned view of the contacting portion of the relay springs of the relay of FIG. 3 according to the invention.
  • FIG. 1 shows a preferred embodiment of a relay according to the invention.
  • Relay 10 comprises two interlocking housing portions 11 and 12.
  • the left hand portion 12 has coil 14 wound thereabout.
  • Coil terminals 15 and terminal portions 16 of the relay springs protrude from portion 12 so that the relay may be plugged into a printed circuit card.
  • FIG. 2 shows a side view of relay 10.
  • magnetic return strip 13- can be seen snapped on to right hand portion 11 and secured in portion 12 at point 39.
  • FIG. 3 is a sectional view of relay 10. Looking first at the left hand portion 12, it can be seen that relay springs 23, 24, and 25 and core 21 are held in position within portion 12 by means of assembly pin 35, and are insulated from one another by insulation 40 which also serves to lock the relay springs and core in place by means of protrusions 47. Moving to the right of FIG. 3, section 43 is provided so that operating coil 14 (FIGS. 1 and 2) may be wound about portion 12 of the relay housing. As can be seen, the free ends of armature, make and break springs 23, 24, and 25,respectively, extend into portion 11 of relay 10. Portion 11 comprises two interlocking sections 17 and 18, which in turn interlock with portion 12 at point 41. Armature 19 is pivotly mounted in groove 44 which is formed when sections 17 and 18 are joined together.
  • relay springs 23, 24 and 25 are entirely removed therefrom.
  • Armature cam 20' which is non-magnetic, supplies the physical link to operate the springs.
  • the springs of the relay need not be made of magnetic material, and because they are not within the magnetic circuit of the relay, may be larger, thicker springs to provide higher contact ratings and longer spring life.
  • both housing portions 11 and 12 are made of a transparent polymethyl methacrylate material.
  • FIGS. 4 and 5 show more detailed views of section 17 which comprises the upper half of portion 11 as shown in FIG. 3. Looking at these views, it becomes apparent that relay has four sets of contacts each comprising an armature make, and break spring, as shown in FIG. 3. Each of the sets of springs has been provided with its own chamber-like opening 29 to guide and house the free ends of the armature and make springs. In this manner, it is less likely that any one of the sets of springs will interfere with the other sets during the operation of the relay. Also, each set has its own guide to insure positive functioning of the relay, Portions 48 serve as back stops for make springs 24 to prevent oscillations thereof.
  • FIGS. 6, 7 and 8 show in more detail, section 18 which is the lower half of portion 11 as shown in FIG. 3.
  • shoulder portions 30 provide a stop for the break springs 25. Shoulder portions 30 also help to dampen spring oscillations which may occur upon deenergization of the relay coil.
  • FIGS. 9 and 10 show in detail armature cam 20 which is located at position 44, FIG. 3, between sections 17 and 18.
  • armature cam 20 is wide enough to operate all of the four armature springs 23 of relay 10. (see FIG. 3) at once.
  • armature cam 20 is made of lightweight acetal delrin and in addition has a cut-out center portion 32 to provide an even lighter load for the relay armature 19, thus using a minimum of current to operate the relay.
  • FIG.11 shows armature 19.
  • edge portions 33 by which armature 19 is pivotally mounted between sections 17 and 18 can be readily seen.
  • Armature 19 is slightly wider than armature cam 20 at their contact area to insure that an equal force is applied to all of the armature springs as they are operated.
  • FIG. 12 shows a top view of core 21 of the relay.
  • Residual disc 22 is provided at the free end of core 21 to prevent the relay from being held operated when the coil is deenergized.
  • Core 21 is Wider than armature 19 at their point of contact, also to insure adequate mating.
  • Aperture 34 is provided to allow assembly pin 35 (FIG. 3) to secure core 21 along with the relay springs, in position in portion 12 of the relay, and apertures 49 are provided to receive a pair of insulation protrusions 47 and a raised portion of the housing 50 to prevent the core from shifting.
  • a preferred material for core 21 is nickel-iron.
  • FIGS. 13, 14, and show in detail magnetic return strip 13.
  • the strip is wide with an indented center portion 45 and is located along one side of relay 10.
  • Magnetic return strip 13 has the additional function a of completing the magnetic circuit of the relay.
  • a preferred material for return strip 13 is pure soft iron with a zinc plating which has been chromate treated.
  • FIG. 16 shows a cross section of the contact areas 26, 27, and 28 of springs 23, 24, and 25, respectively.
  • the armature spring contact area 26 is circular and the make and break spring contact areas 27 and 28 are V-shaped, preferably at a angle.
  • the purpose of designing the springs as shown is to insure a good contact when the relay is operated. More contact surface area is provided by shaping the contacts as shown, thus better mating is provided.
  • the springs are made of nickel-silver with a silver-palladium inlaid strip covering the contact surface.
  • relay 10 First the relay will be plugged into position on a printed circuit card by means of its terminal portions 15 and 1 6. Now it is ready for operation.
  • the relay coil is energized. This moves the free end of armature 19 which is pivotally mounted at position 31 between sections 17 and 18 upward toward the free end of core 21.
  • armature cam 20 which is movably mounted at position 44, between sections 17 and 18 (see FIG. 3), substantially perpendicular to armature 19, is lifted.
  • armature cam 20 rests against armature springs 23 and lifts them so that their contact areas 26 will break with contact areas 28 of break springs 25 and make with contact areas 27 of make springs 23.
  • shoulder portions 30 of section 18, shown best in FIGS. 6, 7, and 8, and portions 48 of section 17 serve to dampen the oscillations of break springs 25 and make springs 24, respectively, which may tend to bounce when the relay returns to its unoperated condition.
  • Adjustment of the relay springs is simple to accomplish. It may be done without unplugging relay 10 from its position in the printed circuit card.
  • First magnetic return strip 13 is snapped away from the relay housing by removing it first from point 46. Next it is pulled out of its imbedded position 39 in portion 12. When magnetic return strip 13 is disconnected, portion 11 may be removed from portion 12 exposing the free ends of the relay springs and making them accessible for adjustment. If need be, sections 17 and 18 making up portion 11 can be separated and armature cam 20 may be replaced. Also, armature 19 may then be removed and replaced or any necessary work then may be done on it.
  • the relay according to the invention may be adjusted with very little effort and all parts are easily replaceable if the need arises.
  • the relay according to the invention incorporates many of the advantages of a dry reed relay such as speed of operation and the use of an enclosed housing to keep the relay contacts dust and dirt free.
  • An additional advantage is that the springs and thus the contact areas are removed from the magnetic circuit of the relay to permit the use of larger contacts to allow higher contact ratings, and to make it possible to use springs made of non-magnetic material.
  • the relay according to the invention provides an increased magnetic circuit efiiciency, allowing, e.g., groups of breakmake contact combinations to be used in a single relay.
  • An electromagnetic switching device comprising: housing means of non-magnetic material having a first and second portion; said first portion carrying winding means and having mounted therein a magnetic core and a plurality of non-magnetic spring contact members and insulated from one another and from said core, one end of each said spring members protruding from one end of said first portion to form terminals, said second portion comprising mutually interlocking sections, with an armature and armature cam located between said sections, said second portion being removably interlocked with'said first portion, and said armature through the medium of said armature cam upon energization of said winding means being magnetically attracted by said core to actuate the free end of said spring members; and a coupling strip for maintaining said first portion and said section of said second portion in an interlocked relation and providing a magnetic return path between said armature and :said core.
  • said plurality of non-magnetic spring contact members comprise one third make, one third break and one third armature springs, wherein one of said sections of said second portion has integrally molded therein a plurality of chamber-like openings, each having back stop portions, and the other of said sections has integrally molded therein a plurality of correspondingly aligned shoulder portions and wherein the free ends of said armature and make springs enter said chamber-like opening with the free ends of said make sprin'gs resting on said back stops and said break springs resting on said shoulder portions so that upon deenergization of said winding means said make and break springs are substantially prevented from bouncing.
  • An electromagnetic switching device comprising:
  • a housing of non-magnetic material having a first and second portion; said first portion including a plurality of spring contact members and a magnetic core, and carrying winding means, said second portion being removably interlocked with said firs-t portion, armature means supported in said second portion and upon the energization of said winding means,

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  • Physics & Mathematics (AREA)
  • Electromagnetism (AREA)
  • Electromagnets (AREA)
  • Switch Cases, Indication, And Locking (AREA)
US499800A 1965-10-21 1965-10-21 Unencapsulated reed contact relay Expired - Lifetime US3333216A (en)

Priority Applications (2)

Application Number Priority Date Filing Date Title
US499800A US3333216A (en) 1965-10-21 1965-10-21 Unencapsulated reed contact relay
BE688311D BE688311A (enrdf_load_stackoverflow) 1965-10-21 1966-10-17

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
US499800A US3333216A (en) 1965-10-21 1965-10-21 Unencapsulated reed contact relay

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US3333216A true US3333216A (en) 1967-07-25

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US499800A Expired - Lifetime US3333216A (en) 1965-10-21 1965-10-21 Unencapsulated reed contact relay

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BE (1) BE688311A (enrdf_load_stackoverflow)

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3516035A (en) * 1968-12-27 1970-06-02 Deutsch Co The Miniature flat pack latching relay
US3544930A (en) * 1968-02-29 1970-12-01 Matsushita Electric Works Ltd Electromagnetic multicontact relay
US3688229A (en) * 1969-12-31 1972-08-29 Telephonie Ind Commerciale Miniature electromagnetic relay
FR2389989A1 (en) * 1977-05-31 1978-12-01 Int Standard Electric Corp Two=way switching relay system - has static T=piece bearing two contacts towards which mobile contacts are resiliently biased
US4290037A (en) * 1978-02-28 1981-09-15 Nippon Electric Co., Ltd. Flat electromagnetic relay

Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2562091A (en) * 1946-08-28 1951-07-24 Bell Telephone Labor Inc Relay

Patent Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2562091A (en) * 1946-08-28 1951-07-24 Bell Telephone Labor Inc Relay

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3544930A (en) * 1968-02-29 1970-12-01 Matsushita Electric Works Ltd Electromagnetic multicontact relay
US3516035A (en) * 1968-12-27 1970-06-02 Deutsch Co The Miniature flat pack latching relay
US3688229A (en) * 1969-12-31 1972-08-29 Telephonie Ind Commerciale Miniature electromagnetic relay
FR2389989A1 (en) * 1977-05-31 1978-12-01 Int Standard Electric Corp Two=way switching relay system - has static T=piece bearing two contacts towards which mobile contacts are resiliently biased
US4290037A (en) * 1978-02-28 1981-09-15 Nippon Electric Co., Ltd. Flat electromagnetic relay

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Publication number Publication date
BE688311A (enrdf_load_stackoverflow) 1967-04-17

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