US2889424A - Relay - Google Patents

Relay Download PDF

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Publication number
US2889424A
US2889424A US706397A US70639757A US2889424A US 2889424 A US2889424 A US 2889424A US 706397 A US706397 A US 706397A US 70639757 A US70639757 A US 70639757A US 2889424 A US2889424 A US 2889424A
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US
United States
Prior art keywords
coil
base
reed
solder
relay
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
US706397A
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English (en)
Inventor
Robert F Glore
Ole M Hovgaard
George E Perreault
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.)
AT&T Corp
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Bell 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
Application filed by Bell Telephone Laboratories Inc filed Critical Bell Telephone Laboratories Inc
Priority to US706397A priority Critical patent/US2889424A/en
Priority to DEW24399A priority patent/DE1161996B/de
Priority to FR1208754D priority patent/FR1208754A/fr
Priority to BE573355A priority patent/BE573355A/fr
Priority to GB41003/58A priority patent/GB854044A/en
Application granted granted Critical
Publication of US2889424A publication Critical patent/US2889424A/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
    • H01H51/00—Electromagnetic relays
    • H01H51/28—Relays having both armature and contacts within a sealed casing outside which the operating coil is located, e.g. contact carried by a magnetic leaf spring or reed
    • H01H51/281—Mounting of the relay; Encapsulating; Details of connections

Definitions

  • This invention relates to relays, and more particularly to relays employing dry reed contacts within a hermetically sealed envelope.
  • the hermetically sealed reel contact device is of relatively simple construction consisting essentially of two reeds which are mounted at opposite ends of an elongated glass envelope. In addition to protecting the reed contacts from dirt and the like, this construction results in extremely low unit cost and this, in turn, accounts in large measure for the extensive use that has been accorded the device.
  • a further object is to simplify the manufacturing and thereby reduce the cost of such relays.
  • a plurality of glass-sealed reed contact devices are arranged coextensively in a group and a common coil surrounds the same and serves, to simultaneously energize the reeds to control electrical circuits.
  • a flux-carrying metallic casing substantially surrounds the coil, with the exception of that portion of the' latter most adjacent the switch gaps of the reed devices. Thus, the coil flux is directed to, and concentrated at, the switch gaps.
  • An added feature of the invent-ion is in the provision of a base having polygonal shaped solder-receiving wells thereinwhich facilitate fabrication. With the outlet terminals each projecting into a well, solder pellets are placed in each well and after the application of sufficient heat to melt the solder, the assembled group of reed devices is mounted on the base with the various terminals of the group simultaneously projected into respective wells.
  • polygonal shaped wells e.g., square or rectangular, permits the gas generated by the flux during heating to escape. That is, the corners in effect act as vents allowing the escape of gas.
  • a further feature of the invention comprises the use of a terminal assembly, mounted on the coil, for indirectly connecting the coil to outlet terminals secured in the base.
  • the coil is electrically connected to the terminal assembly at one end thereof, while the assembly is connected to the outlet terminals at the opposite end.
  • the terminal assembly is capable of some transverse fiexingand thus relativemovement between thecoil and 2 base will tend to flex the terminal assembly rather than subject the coil wires to a strain as was the case heretofore when the coil wires were connected directly to the outlet terminals.
  • Fig. 1 is an enlarged elevational view, partially in cross section, of a relay constructed in accordance with the present invention
  • Fig. 2 is an enlarged view taken on the line 2-2 of Fig. 1; I
  • Fig. 3 is a top view, in reduced scale, of the base shown in cross section in Fig. 1;
  • Fig. 4 is a fragmentary perspective view of the coil and the terminal assembly which indirectly connects the coil to outlet terminals;
  • Fig. 5 is an end elevational view of a modified base which can be used to mount the relay on a printed circuit board;
  • Fig. 6 is a perspective view taken on the line 66 of Fig. 5.
  • An inert gas such as helium, argon, neon, or any other non-corrosive gas, may be inserted in this enclosure for the purpose of reducing arcing across the contact gap, but this is in no Way essential for successful operation of the relay of the present invention.
  • Inserted and sealed in each envelope at either end thereof are contact reeds 13 and 14 having overlapping contact areas 15 and 16, respectively.
  • These contact reeds may be formed of any suitable magnetic material of high electrical conductivity. As shown more clearly in Fig. 2, the contact reeds 13 and 14 are made from a fiat member, but it will be readily appreciated that round contact members or members of other cross sectional configuration may be substituted for the reeds 13 and 14 without departing from the spirit and scope of the invention.
  • Contact areas 15 and 16 may be plated with gold or other precious metal to improve the overall operating characteristics of the device.
  • the four reed devices 11 are coextensive and spaced from each other by means of an insulating spacer 17.
  • a common coil 18 surrounds the group of reed devices and serves to simultaneously energize the reeds to control electrical circuits.
  • a metallic casing 19 of magnetic ma- 7 L terial having low-reluctance surrounds the outer surface of the coil 18.
  • a pair of tube-like metallic members 21, of magnetic material of low reluctance, project into the Interior of the wrapped coil a predetermined distance from the opposite ends thereof.
  • Each member 21 1 has an integral end flange 22 which abuts an end of the coil assembly and contacts, along its periphery, the easing 19. With the exception of that portion most adjacent the switch gaps of the reeds, the coil is thus surrounded by a flux-carrying metallic casing.
  • the coil flux can be assumed to travel to the reeds 13 from the upper metallic memberZl, then down along the reeds 13 to the switch gaps, across the gaps'to reeds 14, along'reeds 14 a short distance, and then back across the air gap to the lower member 21.
  • the metallic members 21 should not be spaced so close together as to present a flux path, through the air, of lower reluctance than the desired path. To this end the members 21 are spaced apart a distance which is approximately twice that of the total distance of the above-noted three short air gaps.
  • Insulator end blocks 23 are positioned, at the ends of the coil and switch group, in abutment with the flange 22.
  • the blocks 23 are provided with portions 24 which are inserted into the interior of the tube-like members 21, forming a fit therewith.
  • the reeds 14 are mass soldered directly to the outlet terminals 25 in the base 26 in a manner to be described, while the reeds 13 are mass soldered to the conductors 27 which are brought down along the sides of the casing 19 and soldered to respective outlet terminals.
  • Insulating material 28 is disposed between the casing 19 and conductors 27. As shown in Fig.
  • each conductor 27 bears against the upper and lower end blocks 23 to prevent them from becoming dislodged.
  • a thin tube of insulating material 29 is slipped over the entire assembly and the outer metallic casing 31 is mounted on the base by a simple crimping operation.
  • the relay base shown in Figs. 1 and 3, constitutes a feature of the invention which facilitates fabrication.
  • the base 26 comprises a plurality of polygonal shaped solder-receiving wells 32.
  • the wells are square in shape and ten in number (two for each reed device and two for the coil). It should be noted, however, that other well configurations, such as triangular or rectangular, would be equally satisfactory.
  • solder pellets are placed in each well and the base is then subjected to suflicient heat to melt the solder.
  • the base may be formed of any insulating material, such as a phenolic molding compound, which possesses a substantially higher melting point than that of solder.
  • the assembled group comprising the coil and reed devices is then mounted on the corner supports 33 of the base, the supports being provided with small knobs 34 which are received in corner recesses (not shown) in the lower end block 23.
  • corner recesses not shown
  • a solder pellet when heated will, of course, spread out radially, but due to surface tension it will retain a round configuration. With such a pellet disposed in a round well or hole, the application of heat causes the solder to spread to and contact the walls of the well. This, however, prevents the gas generated by the flux during heating to escape with the result that the solder will be pushed up and out of the well by the gas. It has been found that this can be overcome through the use of polygonal shaped wells. The heated solder still spreads out and contacts the side walls of the well, but because it tends to retain a round shape it will not spread or fill into the corners of the well. Thus, an effective air vent is provided adjacent each corner permitting the escape of the generated gas.
  • Fig. 4 there is shown a coil unit and a terminal assembly for the same in accordance with the present invention.
  • the coil unit 18 comprises a large number of turns of very thin wires encased in an insulation such as cellulose acetate.
  • the insulation must be used to protect the coil wires from corrosion and the like, but it is the insulation that is primarily responsible for the contraction in length of the coil unit.
  • Terminal assembly 41 includes an element 42 of insulating material, such as cellulose acetate, having the same cross sectional configuration as the coil unit.
  • a pair of wires 43 includes a first pair of upstanding portions 44 at one end or side of the element 42 and a second pair of upstanding portions 45 at the other end of the element.
  • the upstanding portions of each wire are integrally connected by an intermediate section of wire embedded in the insulating element 42.
  • the coil ends 46 are wrapped around and soldered to the base of portions 44 and then the remainder of the latter is cut off, while the portions 45 of the wires are soldered directly to a pair of outlet terminals. Time is saved in fabrication by making the terminal assembly symmetrical and then cutting off the unused upstanding portions, rather than making an unsymmetrical assembly (one short and one long pair of upstanding portions) and then orienting it to the correct position for connection with the coil.
  • the terminal assembly 41 is preferably cemented to the end of the coil unit.
  • the wires 43 are of much greater diameter than the coil wire and thus they can withstand substantially more stress and strain without snapping. Further, the terminal assembly is capable of flexing transversely. With the terminal assembly cemented to the coil unit, any attempted movement of the latter away from the base, due to coil shrinkage or otherwise, will tension the portions 45 of the interconnecting wires.
  • the heavy wires 43 can withstand relatively high stresses and hence, in most cases, movement of this side or end of the coil will be arrested. However, inasmuch as the opposite side of the terminal assembly and coil are free of the base, they can move or shift position with respect thereto. Such movement will transversely flex the terminal assembly, but this is not detrimental for electrical interconnection of the coil and outlet terminals is still maintained. Under considerable stress that portion of the terminal assembly adjoining the upright portions 45 may separate from the coil unit. In this instance, the entire coil will move away from the base, but here again the only effect will be a transverse flexing of the assembly 41.
  • a modified base which can be used to mount the relay unit on a printed circuit board.
  • identical bases are mounted at both ends of the relay and the reeds 13 and 14 are brought out to the bases at their respective ends.
  • a terminal assembly is provided at each end of the coil.
  • Each terminal assembly is similar to that of Fig. 4, except that only a single interconnecting wire is needed at each end.
  • the base 51 formed of an insulating material, comprises a plurality of polygonal shaped solder-receiving wells 52. Small passageways 53 interconnect at one end with the wells 52 and are flared at the other end 54.
  • the passageways 53 are adapted to receive the ends of the reeds or the interconnecting wire of the terminal assembly, as the case may be.
  • Each passageway is designed to closely fit the element to be received and hence the flared ends 54 aid in inserting the elements into the passageways.
  • Spring-like terminals 55, 56, 57, 58, and 59 are provided with portions 61, which project into respective wells, and staggered end extremities 62, which are received on the printed circuit board.
  • the portions 61, disposed in the wells, have outwardly bent extremities 63 for guiding the elements which are inserted into the pas sagev'vays.
  • a reed is inserted into one of the close fitting passageways 53. 'As the reed is pushed along the passageway it enters into a well in the base and then contacts a bent extremity 63.
  • the extremity directs the reed to a position between the portion 61 of the terminal and the adjoining side wall of the well.
  • the terminal being resilient is displaced slightly from its original position and hence it bears against the reed to form a contact therewith preparatory to the soldering operation. If the extremity 63 were not bent as shown, the inserted reed would occasionally abut the end of the terminal preventing its projection into the well.
  • the terminals 56 and 58 which project into the bottom row of wells 52 also comprise a number of right ,angularly disposed sections, but they are necessarily of a diiferent configuration than the first-mentioned terminals. These latter terminals are illustrated at 58 in Fig. 6.
  • a portion of terminal 56 has been broken away in Fig. 6 to show more clearly the terminal 55; and the reeds 14, shown inserted into the wells in Fig. 5, have been omitted in Fig. 6.
  • each of the terminals is provided with an inwardly extending portion 60 which projects through the base to the opposite side thereof.
  • Tabs 65 are provided at the end of the inwardly extending portion 60, and they are bent at right angles to bear against the adjacent igat surface of the base for holding the terminals to the ase.
  • solder pellets can be placed in each well and then heated. This, of course, is similar to the fabrication of the relay of Fig. 1.
  • the passageways 53 fit sufiiciently close about the inserted elements as to prevent the loss of solder therethrough.
  • a thin stream of molten solder can be directed at each interface to form a good electrical connection therebetween.
  • the passageways 53 need not fit closely about the inserted elements.
  • relay unit comprising four reed switching devices
  • the relay may comprise any number of reed devices, and relay units with sixteen or more of such devices are not uncommon.
  • a relay comprising a plurality of reed contact switching devices arranged coextensively in a group, a common energizing coil surrounding said group, a fluxcarrying metallic casing of low reluctance surrounding said coil except for that portion of the latter most adjacent to the switch gaps of the switching devices, a base of insulating material having polygonal shaped solderreceiving wells therein, outlet terminal means mounted in said base and projecting into said solder-receiving wells, said coil and switching devices being electrically interconnected to said outlet terminal means by solder pellets disposed in said solder-receiving wells, and a terminal assembly mounted on the end of said coil most adjacent said base for electrically interconnecting the coil to outlet terminal means in said base, said coil being electrically connected to the terminal assembly 6 at one of the ends thereof while said assembly is electrically connected to said outlet terminal means at the opposite end, said terminal assembly having a length between said ends which is substantially greater than its thickness and which lies in a plane substantially parallel with
  • a relay comprising a plurality of reed switching devices arranged coextensively in a group, each of said switching devices comprising a tubular envelope and a pair of contact reeds mounted at respective ends of said envelope and extending longitudinally thereof so as to present overlapping contact areas, a common energizing coil surrounding said group, a flux-carrying metallic casing of low reluctance surrounding said coil except for that portion of the latter most adjacent the switch gaps of the switching devices, a base of insulating material having a plurality of polygonal shaped solder-receiving wells therein, a plurality of outlet terminals mounted in said base and projecting into respective wells in said base, said coil and switching devices being electrically interconnected to respective outlet terminals by solder pellets disposed in said wells, the insulating material of said base having a substantially higher melting point than that of the solder, and a terminal assembly mounted on the end of said coil most adjacent said base for electrically interconnecting the coil to outlet terminals in
  • a relay comprising a plurality of reed switching devices arranged coextensively in a group, each of said switching devices comprising a tubular envelope and a pair of contact reeds mounted at respective ends of said envelope and extending longitudinally thereof so as to present overlapping contact areas, a common energizing coil surrounding said group, a first metallic casing of low reluctance encompassing the outer surface of said coil, and a pair of low reluctance metallic casings of tube-like configuration mounted at respective ends of said coil, each of said pair of casings extending coaxially into the interior of said coil to a point adjacent the switch gaps of the switching devices, said pair of casings having end flanges overlying the ends of said coil.
  • a relay comprising reed contact switching means, an energizing coil surrounding said switching means, a base having outlet means mounted therein, and a terminal assembly mounted on the end of said coil most adjacent said base for electrically interconnecting the coil to outlet means in said base, said coil being electrically connected to the terminal assembly at one of the ends thereof while said assembly is connected to said outlet means at the opposite end, said terminal assembly having a length between said ends which is substantially greater than its thickness and which lies in a plane substantially parallel with the end of said coil.
  • a plurality of reed contact switching means an energizing coil surrounding said switching means, a base of insulating material having polygonal shaped solder-receiving wells therein, outlet terminal means mounted in said base and projecting into said solder-receiving wells, said coil and switching means being electrically interconnected to said outlet terminal means by solder pellets disposed in said solder-receiving wells, and a terminal assembly mounted on the end of said coil most adjacent said base for electrically interconnecting the coil to outlet terminal means in said base, said coil being electrically connected to the terminal assembly at one of the ends thereof while said assembly is electrically connected to said outlet terminal means at the opposite end, said terminal assembly having a length between said ends which is substantially greater than its thickness and which lies in a plane substantially parallel with the end of said coil.
  • each of said switching devices comprising a tubular envelope and a pair of contact reeds mounted at respective ends of said envelope and extending longitudinally thereof so as to present overlapping contact areas, a common energizing coil surrounding said group, a base of insulating material having a plurality of polygonal shaped solder-receiving wells therein, a plurality of outlet terminals mounted in said base and projecting into respective wells in said base, said coil and switching devices being electrically interconnected to respective outlet terminals by solder pellets disposed in said wells, the insulating material of said base having a substantially higher melting point than that of the References Cited in the file of this patent UNITED STATES PATENTS 2,167,588 Rozumek July 25, 1939 2,378,986 Dickten June-26, 1945 2,459,306 Burton Jan. 18, 1949 2,683,785 Miller July 13, 1954

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  • Physics & Mathematics (AREA)
  • Electromagnetism (AREA)
  • Electromagnets (AREA)
  • Switch Cases, Indication, And Locking (AREA)
  • Manufacture Of Switches (AREA)
US706397A 1957-12-31 1957-12-31 Relay Expired - Lifetime US2889424A (en)

Priority Applications (5)

Application Number Priority Date Filing Date Title
US706397A US2889424A (en) 1957-12-31 1957-12-31 Relay
DEW24399A DE1161996B (de) 1957-12-31 1958-11-05 Verfahren zur Herstellung von Loetanschluessen bei elektromagnetischen Relais
FR1208754D FR1208754A (fr) 1957-12-31 1958-11-19 Relais
BE573355A BE573355A (fr) 1957-12-31 1958-11-27 Relais
GB41003/58A GB854044A (en) 1957-12-31 1958-12-19 Improvements in or relating to electromagnetic relays employing magnetic reed contacts

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
US706397A US2889424A (en) 1957-12-31 1957-12-31 Relay

Publications (1)

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US2889424A true US2889424A (en) 1959-06-02

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US706397A Expired - Lifetime US2889424A (en) 1957-12-31 1957-12-31 Relay

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US (1) US2889424A (de)
BE (1) BE573355A (de)
DE (1) DE1161996B (de)
FR (1) FR1208754A (de)
GB (1) GB854044A (de)

Cited By (17)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2993103A (en) * 1960-01-26 1961-07-18 Gen Electric Electromagnetic relay
US3031550A (en) * 1959-10-28 1962-04-24 Clare & Co C P Switching assembly
US3033939A (en) * 1957-04-05 1962-05-08 Siemens And Halske Ag Berlin A Coordinate switch
US3038976A (en) * 1958-04-28 1962-06-12 Clare & Co C P Relay construction
US3114018A (en) * 1960-06-23 1963-12-10 Clare & Co C P Switching assembly comprising a plurality of sealed units
US3128356A (en) * 1961-07-28 1964-04-07 Automatic Elect Lab Mounting lugs and bobbin for dry reed relays
US3134867A (en) * 1961-07-26 1964-05-26 Richard S Winship Multiple-flux electrical reed relay
US3138679A (en) * 1961-07-15 1964-06-23 Automatic Telephone & Elect Support structure for electromagnetic reed relay
US3188423A (en) * 1961-07-27 1965-06-08 Automatic Elect Lab Crosspoint switching arrays
US3193731A (en) * 1961-08-21 1965-07-06 Automatic Elect Lab Printed matrix board assembly
US3215794A (en) * 1961-11-09 1965-11-02 Clare & Co C P Reed relay mounting assembly
US3238327A (en) * 1964-10-27 1966-03-01 Automatic Elect Lab Reed relay for printed circuit module
US3239626A (en) * 1962-07-23 1966-03-08 Allen Bradley Co Sealed switch relay
US3305657A (en) * 1963-04-01 1967-02-21 Ass Elect Ind Circuit breaker for high power, high voltage networks
US3308409A (en) * 1961-12-26 1967-03-07 Automatic Elect Lab Mercury relay
US3308408A (en) * 1965-10-11 1967-03-07 James Electronics Inc Encapsulated switch having structure for preventing unwanted thermoelectric transients
US3419829A (en) * 1960-07-09 1968-12-31 Baermann Max Dry reed contact relay with permanent magnet

Families Citing this family (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE1263188B (de) * 1964-08-13 1968-03-14 Standard Elektrik Lorenz Ag Spule fuer Schutzrohrankerkontaktrelais und Verfahren zu deren Herstellung
DE2915149C3 (de) * 1979-04-12 1981-11-05 Siemens AG, 1000 Berlin und 8000 München Mehrpoliges Schutzgaskontaktrelais
DE3705923A1 (de) * 1987-02-25 1988-09-08 Hengstler Bauelemente Relais-magnetspule

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2167588A (en) * 1935-11-02 1939-07-25 Sun Vic Controls Ltd Electromagnetically operated switch
US2378986A (en) * 1940-07-11 1945-06-26 Bell Telephone Labor Inc Polarized relay
US2459306A (en) * 1944-07-21 1949-01-18 Bell Telephone Labor Inc Contact protection for mercury wetted switch contacts
US2683785A (en) * 1950-02-03 1954-07-13 Price Electric Corp Electromagnetic relay

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2167588A (en) * 1935-11-02 1939-07-25 Sun Vic Controls Ltd Electromagnetically operated switch
US2378986A (en) * 1940-07-11 1945-06-26 Bell Telephone Labor Inc Polarized relay
US2459306A (en) * 1944-07-21 1949-01-18 Bell Telephone Labor Inc Contact protection for mercury wetted switch contacts
US2683785A (en) * 1950-02-03 1954-07-13 Price Electric Corp Electromagnetic relay

Cited By (17)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3033939A (en) * 1957-04-05 1962-05-08 Siemens And Halske Ag Berlin A Coordinate switch
US3038976A (en) * 1958-04-28 1962-06-12 Clare & Co C P Relay construction
US3031550A (en) * 1959-10-28 1962-04-24 Clare & Co C P Switching assembly
US2993103A (en) * 1960-01-26 1961-07-18 Gen Electric Electromagnetic relay
US3114018A (en) * 1960-06-23 1963-12-10 Clare & Co C P Switching assembly comprising a plurality of sealed units
US3419829A (en) * 1960-07-09 1968-12-31 Baermann Max Dry reed contact relay with permanent magnet
US3138679A (en) * 1961-07-15 1964-06-23 Automatic Telephone & Elect Support structure for electromagnetic reed relay
US3134867A (en) * 1961-07-26 1964-05-26 Richard S Winship Multiple-flux electrical reed relay
US3188423A (en) * 1961-07-27 1965-06-08 Automatic Elect Lab Crosspoint switching arrays
US3128356A (en) * 1961-07-28 1964-04-07 Automatic Elect Lab Mounting lugs and bobbin for dry reed relays
US3193731A (en) * 1961-08-21 1965-07-06 Automatic Elect Lab Printed matrix board assembly
US3215794A (en) * 1961-11-09 1965-11-02 Clare & Co C P Reed relay mounting assembly
US3308409A (en) * 1961-12-26 1967-03-07 Automatic Elect Lab Mercury relay
US3239626A (en) * 1962-07-23 1966-03-08 Allen Bradley Co Sealed switch relay
US3305657A (en) * 1963-04-01 1967-02-21 Ass Elect Ind Circuit breaker for high power, high voltage networks
US3238327A (en) * 1964-10-27 1966-03-01 Automatic Elect Lab Reed relay for printed circuit module
US3308408A (en) * 1965-10-11 1967-03-07 James Electronics Inc Encapsulated switch having structure for preventing unwanted thermoelectric transients

Also Published As

Publication number Publication date
GB854044A (en) 1960-11-16
BE573355A (fr) 1959-03-16
FR1208754A (fr) 1960-02-25
DE1161996B (de) 1964-01-30

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