US3202785A - Electromagnetic relay with an interchangeable contact mechanism - Google Patents
Electromagnetic relay with an interchangeable contact mechanism Download PDFInfo
- Publication number
- US3202785A US3202785A US93518A US9351861A US3202785A US 3202785 A US3202785 A US 3202785A US 93518 A US93518 A US 93518A US 9351861 A US9351861 A US 9351861A US 3202785 A US3202785 A US 3202785A
- Authority
- US
- United States
- Prior art keywords
- contacts
- chamber
- carrier
- contact
- coil
- 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
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Classifications
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
- H01H11/00—Apparatus or processes specially adapted for the manufacture of electric switches
- H01H11/0006—Apparatus or processes specially adapted for the manufacture of electric switches for converting electric switches
- H01H11/0012—Apparatus or processes specially adapted for the manufacture of electric switches for converting electric switches for converting normally open to normally closed switches and vice versa
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
- H01H50/00—Details of electromagnetic relays
- H01H50/16—Magnetic circuit arrangements
- H01H50/18—Movable parts of magnetic circuits, e.g. armature
- H01H50/20—Movable parts of magnetic circuits, e.g. armature movable inside coil and substantially lengthwise with respect to axis thereof; movable coaxially with respect to coil
- H01H50/22—Movable parts of magnetic circuits, e.g. armature movable inside coil and substantially lengthwise with respect to axis thereof; movable coaxially with respect to coil wherein the magnetic circuit is substantially closed
Definitions
- This invention relates to Inultipole electric relays of the kind in which an armature'is adapted to be displaced under the control of a coil and an associated magnet to actuate a carrier having moving contacts which are engageable with fixed contacts.
- the object of the present invention is to provide a relay of simple and compact construction, which is capable of operating efliciently whether it comprises either normally open and normally closed contacts, or normally open contacts only.
- the contact carrier of a relay of the kind referred to is provided with contacts movable between fixed contacts on an arc chamber and fixed contacts on a detachable member which imposes a predetermined load upon the carrier and is replaceable by means adapted to impose a corresponding or substantially identical force on the said carrier so as to enable a normally open and a normally closed contact arrangement to be substtiuted by a normally open contact arrangement only without having to install a diiferent coil.
- FIGURE 1 is an elevation, partly in section, of an electric relay provided with an upper system of normally closed, and a lower system of normally open, contacts.
- FIGURE 2 is a section along the line lI-II, FIG- URE 1.
- FIGURE 3 is a partly exploded perspective view of a relay and amounting plate ⁇ and FIGURE 4 is a perspective view of a bowed spring means used as a substitute for the head shown in FIGS. 1-3.
- the relay comprises a boxlike base or body portion 1, an arc chamber 2 which is superimposed upon and spans the mouth of the base, and a head member 3 which is superimposed upon the arc chamber, the said base, are chamber and head member each consisting of a moulding of electric insulating material and all being of the same width.
- a rectangular and substantially flat attachment plate 4 is secured to the underside of the base by screws 5; the plate is of the same width as, but of greater length than, the moulded base and projects (see FIGURES 2 and 3) equidistantly beyond the opposite ends of the said base; the said attachment plate is formed with a key-hole shaped opening 6 in the vicinity of one corner of one of its projecting portions, and with a slot 7 in the diagonally opposed corner of its other projecting portion, as shown in FIG. 3; the said slot reaches and opens to the transverse edge of the adjacent plate end.
- the fiat floor enables the back plate to be secured upon a panel or support (not shown) and the flanges provide means whereby two relays ice may be detachably mounted, side-by-side, upon the said plate by passing the key-hole opening in each of the respective attachment plates over the head of a screw (not shown) engaging a corresponding one of two tapped holes 12 in one of the flanges 10 and by passing the slot 7 in each of the said attachment plates into engagement with the shank of a screw (not shown) engaging a corresponding one of two tapped holes 13 in the other of the said flanges; as a consequence, each attachment plate spans the mouth, and is spaced from the floor, of the back plate; also, since the holed and slotted portions of the attachment plates project respectively beyond the opposite ends of the relay bases, the heads of the said screws are exposed and are accessible by a screwdriver so that the screws may be tightened to secure both relays firmly upon the back plate 8 and, when desired, slackened to enable the relays
- the box-like base 1 of the relay houses a shallow E- shaped magnet 14 of which the bridge 14* seats upon a bow spring 15 disposed in a transverse groove 16 in the bottom of the base.
- the former 17 of a coil 18 has an axial bore 19 of rectangular section and the central limb 14 of the said magnet is of a corresponding but smaller section and is received within one end of the said bore; the coil is disposed between outwardly extending peripheral flanges 26, 21, onthe opposite ends of the former 17, the flange 20 being seated upon the magnet between the central limb 14 and two outer limbs 14, whereas the flange 21 enters an opposed pair of recesses 22 formed in the rim of the base, and is clamped in the said recesses by the rim of the superimposed arc chamber 2.
- the are chamber is also of box-like formation, and is secured mouth downwards upon the base 1 by screws 23 which pass freely through straps 24, moulded integrally with and externally of the chamber, and which engage tapped bushes 25 secured within lugs 26 moulded on and externally of the base 1.
- the are chamber is also formed with a system of external and parallel ribs or partitions 27 which project from the end walls and crown of the chamber, and each strap 24 is located between a corresponding two of the said partitions at the mouth of the chamber.
- a contact carrier 28 which also consists of a moulding of electric insulating material is slidably housed within the arc chamber and is secured upon the bridge 29 of an E-shaped armature 29 of which the central limb 29* extends into the other end of the bore of the coil former 17 and the outer limbs 29 embrace the coil and former, are in respective alignment with the outer limbs 14 of the shallow magnet 14, and are formed with lateral ribs 29 which are received and are slidable lengthwise of internal guiding grooves l in the walls of the base 1.
- each lug 30 has a corresponding one of a pair of fixed contacts 31 secured thereto by a threaded terminal post 32, the said contacts reaching over the crown of the chamber to the opposite edges of an opening 33 formed in and transversely of the said crown and extending from one to the other side wall of the chamber.
- Each of the partitions 27 located between the said side walls has a slot 34 which extends between its upper edge and the opening 33, the said slots coinciding one with another transversely of the chamber 2 to form a transverse gap,'and a traverse 23 see FIG. 4, forming part of the contact carrier 23 projects through the opening 33 into the said gap; between each two adjacent partitions, the said traverse is formed with an aperture 28 in which a pair of channel-section metal pressings 35 are accommodated mouth-to-mouth.
- a compressed coil spring 36 interposed between the pressings of each pair, urges them apart towards and away from the base 1 respectively and a central depression 35* is formed in the external surface of the base of each of the said pressings.
- the apertures 28' alternate, transversely of the contact carrier, with ribs 23 (see FIGURE 3) which project from opposite sides of the traverse and engage freely in guiding grooves 27 in the edges of the partitions on opposite sides of the said gap.
- 'A metal strip 37 formed with a central nose 37, passes between each pressing 35 and one edge of the corresponding aperture 28 the said strip being held against longitudinal movement by engagement of the nose $7 with the depression in the base of the pressing, and being provided at its opposite ends with a lower pair of moving contact buttons 38 which are adapted respectively to be taken into and out of abutment with the fixed contacts 31 to provide one of a lower system of a set of normally open contacts.
- similar contact strip 39 formed with a central nose 39 which engages the depression in the base of the corresponding pressing remote from the base, and provided at each of its opposite ends with a moving contact button 40, also passes through each of the traverse apertures 28
- the moving contact buttons 40 of each strip 3! are adapted to be taken into and out of abutment with a corresponding pair of fixed contacts 41 to provide one of a set of an upper system of normally closed contacts.
- the fixed contacts 41 are mounted upon the head member 3 which comprises an inverted T-section body 3 and is formed with partitions 42 each of which is located in the same plane as a corresponding one of the chamber partitions 27; each of the said fixed contacts 41 is accommodated between a corresponding two of the partitions 42 and embraces one or other of the ends of the head of the body 3 to which it is secured by a threaded terminal post 43 screwed into the said head.
- the head member 3 acting through the said cont-acts and the compressed springs 36, impose a load of a preselected value upon the said assembly and this load (interalia) determines the speed at which the assembly is attracted towards the magnet against the action of the spring-loaded plungers, when the coil is energized.
- means such as a bowed spring 60 may be assembled to and lengthwise of the upper end of the gap 34 in the partitions 27 so that the said spring is abutted by the upper edge of the traverse 28 before the said assembly terminates its plunger-initiated movement; for example, the bowed spring may be pro-
- the head member is retained upon the partitions of i the arc chamber by lateral spring clips 44 having hooked ends which respectively engage holes 2 in the outermost partitions of the chamber and recesses 3 in the upper edge of the stem of the head member, and is located relatively to the said chamber by the engagement of projections 45 from the upper edges of the said outermost partitions 27, is compiementary recesses 42 in the lower edges of the outermost partitions 42.
- the assembly consisting of the contact carrier 28 and armature 29 is urged away from the base 1, by a pair of spring-loaded plungers 54 mounted within diagonally opposite corners of the said base, so that when the circuit of the coil 18 is open, the said contact carrier and armature assembly is driven by the plungersinto abutment with the internal surface of the crown of the arc chamber, the moving contacts 37, 38, of the normally open set of contacts are disengaged from their com plementary fixed contacts 31, while the moving contacts 39, 40 are engaged with the complementary fixed contacts 41 of the normally closed set of contacts.
- the coil circuit When the coil circuit is closed, the coil is energized and the armature is attracted to the magnet core 14 so that the :said assembly is pulled downwardly toward the core Within the arc chamber and base against the action :of the spring biased plungers, the normally open set of contacts is closed, and the normally closed set of contacts is opened.
- the stroke of the contact carrier and armature assembly is such that when the armature is attracted to g the m-agnet,'the moving contacts of the normally open set engage their complementary fixed contacts before the magnet-initiated movement of the assembly is completed so that during the final stage of the said movement, the
- An electric relay comprising a box-like base, a magnet, a coil and an armature housed in said base, an
- a contact carrier assembled to said armature, said carrier being disposed within said chamber and provided with an end projecting rearwardly thereof, a member adapted to be detachably assembled to said chamber, said member cooperating with said coil to impose a predetermined load on said carrier, fixed contacts disposed on said chamber and on said member, movable contacts disposed on said carrier for engagement with said fixed contacts in a combined normally open and a normally closed arangement therewith, and a non-contact means detachably assembled to said chamber, said means cooperating with said coil to impose a substantially identical load on said carrier as said member when substituted therefor, said means changing such combined open and closed arrangement to a normally open contact arrangement only.
- An electric relay accordinging to claim 1 wherein said carrier is provided with apertures therein, two contact strips extend through each of said apertures beyond opposite sides of said carrier, a compressed spring is disposed within each of said apertures to urge said strips apart toward said first and second set of fixed contacts, said strips and said springs transmitting said first predetermined load from said member to said carrier.
- said third set of contacts comprises pairs of movable contacts, each of said pairs being disposed between said first and said second sets of fixed contacts, and a stressed spring is disposed between each of said pairs to urge each movable contact apart, said spring being additionally stressed when either said normally closed contacts or said normally open contacts are closed.
- each of said pairs of movable contacts being disposed on a contact strip, two contact strips extending through each of said apertures beyond opposite sides of said carrier, and each of said stressed springs is disposed in one of said apertures to ur e said stri s a art, said stri s and said s rin s trans- P mitting said predetermined load from said second member to said carrier.
- An electric relay according to claim 8 wherein said carrier is formed with apertures therein, each of said pairs of movable contacts being disposed on a contact strip, two contact strips extending through each of said apertures beyond opposite sides of said carrier, and each of said stressed springs is disposed in one of said apertures to urge said strips apart, said strips and said springs transmitting said pretermined force from said detachable member to said carrier.
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- Engineering & Computer Science (AREA)
- Manufacturing & Machinery (AREA)
- Physics & Mathematics (AREA)
- Electromagnetism (AREA)
- Breakers (AREA)
- Switch Cases, Indication, And Locking (AREA)
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
US328782A US3243547A (en) | 1961-03-06 | 1963-12-05 | Electric relay combination with latching interlocking means |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
GB8429/60A GB919648A (en) | 1960-03-10 | 1960-03-10 | Improvements in electric relays |
Publications (1)
Publication Number | Publication Date |
---|---|
US3202785A true US3202785A (en) | 1965-08-24 |
Family
ID=9852340
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
US93518A Expired - Lifetime US3202785A (en) | 1960-03-10 | 1961-03-06 | Electromagnetic relay with an interchangeable contact mechanism |
Country Status (3)
Country | Link |
---|---|
US (1) | US3202785A (de) |
DE (1) | DE1203358B (de) |
GB (1) | GB919648A (de) |
Cited By (6)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US3453569A (en) * | 1967-08-31 | 1969-07-01 | Cutler Hammer Inc | Electromagnetic switching device |
US3727157A (en) * | 1972-01-17 | 1973-04-10 | Westinghouse Electric Corp | Electric control device |
US3748608A (en) * | 1972-01-17 | 1973-07-24 | Westinghouse Electric Corp | Electric control device |
US3825865A (en) * | 1973-05-11 | 1974-07-23 | Essex International Inc | Electromagnetic relay |
US4316165A (en) * | 1979-03-30 | 1982-02-16 | Siemens Aktiengesellschaft | Electromagnetic relay wth add-on conductor capability |
US4503409A (en) * | 1981-12-30 | 1985-03-05 | La Telemecanique Electrique | Electro-magnetic switch device having different open or closed switch configurations |
Citations (9)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US2162126A (en) * | 1937-12-14 | 1939-06-13 | Penn Electric Switch Co | Burner control apparatus |
US2798917A (en) * | 1954-08-26 | 1957-07-09 | Eagle Signal Corp | Solenoid actuated interrelated locking means for flow controls in a plurality of independent channels |
US2881284A (en) * | 1955-09-15 | 1959-04-07 | Square D Co | Dynamic braking contactor |
US2919327A (en) * | 1957-05-20 | 1959-12-29 | Allen Bradley Co | Contact structure for electromagnetic actuator |
US2921166A (en) * | 1956-01-23 | 1960-01-12 | Clark Controller Co | Electric relays |
US2985736A (en) * | 1959-06-08 | 1961-05-23 | Allen Bradley Co | Reversible contact structure |
US3099730A (en) * | 1960-10-18 | 1963-07-30 | Tateishi Kazuma | Magnetic switch |
US3109905A (en) * | 1960-09-08 | 1963-11-05 | Furaas Electric Company | Magnetic contactor |
US3129304A (en) * | 1960-09-23 | 1964-04-14 | Cutler Hammer Inc | Reversible contact molded frame relay |
-
1960
- 1960-03-10 GB GB8429/60A patent/GB919648A/en not_active Expired
-
1961
- 1961-02-28 DE DEC23523A patent/DE1203358B/de active Pending
- 1961-03-06 US US93518A patent/US3202785A/en not_active Expired - Lifetime
Patent Citations (9)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US2162126A (en) * | 1937-12-14 | 1939-06-13 | Penn Electric Switch Co | Burner control apparatus |
US2798917A (en) * | 1954-08-26 | 1957-07-09 | Eagle Signal Corp | Solenoid actuated interrelated locking means for flow controls in a plurality of independent channels |
US2881284A (en) * | 1955-09-15 | 1959-04-07 | Square D Co | Dynamic braking contactor |
US2921166A (en) * | 1956-01-23 | 1960-01-12 | Clark Controller Co | Electric relays |
US2919327A (en) * | 1957-05-20 | 1959-12-29 | Allen Bradley Co | Contact structure for electromagnetic actuator |
US2985736A (en) * | 1959-06-08 | 1961-05-23 | Allen Bradley Co | Reversible contact structure |
US3109905A (en) * | 1960-09-08 | 1963-11-05 | Furaas Electric Company | Magnetic contactor |
US3129304A (en) * | 1960-09-23 | 1964-04-14 | Cutler Hammer Inc | Reversible contact molded frame relay |
US3099730A (en) * | 1960-10-18 | 1963-07-30 | Tateishi Kazuma | Magnetic switch |
Cited By (6)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US3453569A (en) * | 1967-08-31 | 1969-07-01 | Cutler Hammer Inc | Electromagnetic switching device |
US3727157A (en) * | 1972-01-17 | 1973-04-10 | Westinghouse Electric Corp | Electric control device |
US3748608A (en) * | 1972-01-17 | 1973-07-24 | Westinghouse Electric Corp | Electric control device |
US3825865A (en) * | 1973-05-11 | 1974-07-23 | Essex International Inc | Electromagnetic relay |
US4316165A (en) * | 1979-03-30 | 1982-02-16 | Siemens Aktiengesellschaft | Electromagnetic relay wth add-on conductor capability |
US4503409A (en) * | 1981-12-30 | 1985-03-05 | La Telemecanique Electrique | Electro-magnetic switch device having different open or closed switch configurations |
Also Published As
Publication number | Publication date |
---|---|
DE1203358B (de) | 1965-10-21 |
GB919648A (en) | 1963-02-27 |
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