US2632065A - Electrical switching apparatus - Google Patents
Electrical switching apparatus Download PDFInfo
- Publication number
- US2632065A US2632065A US122248A US12224849A US2632065A US 2632065 A US2632065 A US 2632065A US 122248 A US122248 A US 122248A US 12224849 A US12224849 A US 12224849A US 2632065 A US2632065 A US 2632065A
- Authority
- US
- United States
- Prior art keywords
- comb
- springs
- spring
- lever
- springset
- 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
- H01H50/00—Details of electromagnetic relays
- H01H50/54—Contact arrangements
- H01H50/56—Contact spring sets
- H01H50/58—Driving arrangements structurally associated therewith; Mounting of driving arrangements on armature
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
- Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
- Y10T29/00—Metal working
- Y10T29/49—Method of mechanical manufacture
- Y10T29/49002—Electrical device making
- Y10T29/49105—Switch making
Definitions
- the present invention relates to electrical switching apparatus of the type employing a plurality of contacted leaf springs secured towards one end in a pile and suitably interleaved by insulators to make a so-called springset for actuation by lever, cam, push rod or the like and having particular application to electromagnetic relays, selectors and like equipment in automatic telephone and other electrical signalling systems.
- Such springsets fall broadly into two classes.
- the first of these classes employ lifting pins and/or studs of metal and/or insulating material which serve mechanically to interconnect the so-called lever or moving springs in each of the contact units forming the springset so as to enable the movement of the armature to be communicated to them whilst maintaining them elec- .trically isolated.
- Relays of the foregoing type are now standardized by the British Post Office.
- the core and the associated winding or windings form a complete subassembly which may be withdrawn from the relay by re- :moving a single unit.
- the windings are terminated on tags fixed to the Bakelite rear coil cheek, while the core is of L-shape and has a machined knife-edge on its front extremity.
- the construction provides a close magnetic joint between the yok and the core which are clamped together by the above-referred-to nut.
- the armature is of like construction and rides on the knife-edge. Lateral displacement is avoided by means of a spring-loaded fixing screw.
- the outstanding feature of the 3000 type relay is the provision of a buffer block which serves as a positioning piece for the contact springs. The front portion of the block is formed into a series of steps which engage with projecting lugs on the side of the contact springs.
- the contact units are arranged in two piles, one on each side of the buffer block, and the loads of the two piles are arranged to be as equal as possible.
- the movable springs of the contact units are operated by lifting pins with which the armature engages during its movement when the coil is energized.
- the 600 type relay is very similar in construction. However, it is designed for use in circumstances where space and cost are important, and when critical performance is not required. The main difference might be regarded as resting in a simplification in the knife-edge mounting of the armature, as well as certain limitations in the number of contact units which can be provided.
- This class of springset suffers from the disadvantage of involving the manufacture of the various kinds of lifting pins and/ or studs and the comparatively laborious and time-consuming operation of securing said lifting pins and/o1 studs to the lever springs.
- the second class of springset is known as the comb-actuated type and employs a comb-like member of stiff electricallyinsulating material passing into slots in the contacted springs and having teeth or notches which co-operate with the lever springs.
- this class of springset even though it may have two or more contact units, has hitherto involved the inclusion of a number of members, in addition to the electrically-conducting springs, to serve as locating means whereby the teeth are maintained in a suitable Working position relative to the lever springs.
- the object of the present invention is to provide a simple and improved comb-actuated springset which has a long and useful life and is quick and easy to assemble.
- a comb-actuated springset comprising one or more contact units each including a contacted lever spring and at least one associated substantially stationary contacted spring, the springset being operable by an external force applied to a comb member of insulating material arranged toengage with the lever spring or springs and being restored due to the resilience of the lever springs, the comb member is retained in its workmg position by interlocking means provided between the comb member and the outer lever springs of the springset where the latter comprises more than one contact unit or where the springset comprises a single contact unit only between the comb member and the lever spring of the contact unit and an additional spring, said comb member being so shaped as to be capable of insertion into or removal from the springset by flexing one or more of the springs in a direction which is opposite to the operating movement of the lever spring or springs.
- a comb-actuated springset comprising one or more contact units each including a contacted lever spring and at least one associated substantially stationary contacted spring, the springset being operable by an external force applied to a comb member of insulating material arranged to engage with the lever spring or springs and being restored due to the resilience of the lever springs
- the comb member is provided with a head and foot so dimensioned with respect to slots provided in the outer lever springs where more than one contact unit is employed or where a single contact unit is employed provided in the lever spring and an additional lever spring that the comb member is maintained in its working position
- the insertion and removal of the, comb member from the springset being effected by flexing one or more of the springs in a direction which is opposite to the operating movement of the lever springs whereby due to the position and the dimensions of slots in the remaining springs with respect to the slots in said outer lever springs.
- the comb. member is capable of being threaded through the slots soas to take up its working position.
- a comb-actuated. springset comprising one or more contact units each including a contacted lever spring and at least one associated substantially stationary contacted spring, the springset being operable. by an external force applied to a comb member of insulating material arrangedto engagewith the lever springer springs and being restored due to the resilience of the lever springs, the comb member passes through slots in the springs and is providedwith a head which when the comb member is in the Working position is prevented by its size from passing through the slot in an outer lever spring, the insertion and removal of the comb member being effected by flexing one or more of the springsin a direction which is opposite to the operating movement of the lever springs and threading the.
- Fig. 4 and 5 show, also in skeletonform, a relay of the same type but having a springset comprising two contact units only.
- Fig. 1 represents a side view of a, relay
- Fig. 2 is, a sectional view in the direction A- -A of Fig. 1
- Fig. 3 is 'a part plan View.
- Figs. 4 and 5. represent side and sectional views respectively of a relay, the latter being the direction B,-B of Fig. 4.
- the relay shown is broadly along the lines of the British Post" Office type 3909 relay.
- the springset comprises four contact units being, from bottom to top, a make, a changeover or 'break-make, another, make and finally a break.
- the contacted springs which are of the well-known twin contacted and bifure cated type are individually referenced 1.0;to18.
- the operating member 23 which will henceforth be termed a comb, and is of inflexible electrically-insulating and stable material is threaded into position within the various slots such as 24 in the springs.
- the slots may be more clearly defined in Fig. 1 the portions of the springs about them are shown broken away near the comb. As regards the slots, these are axial with the springs and, as can be seen from Fig. 3, are slightly wider than the comb which is of uniform thickness. It may be convenient to refer to right-hand and lefthand limits of the slots as the front and back edges respectively.
- tooth 3i preventing the comb from falling too far. Should it berequiredto removethe.
- Figs. 4 are representative of a relay of the same type as that already described but employing a contacted springset comprising one changeover, or break-make, and one break contact unit.
- the changeover unit comprises springs 40, 4
- the springs together with insulators are secured in pile as before and it will be noted that the slots in the lever springs, namely springs 4
- the comb 45 is manipulated into position, before the springset is mounted on the heelpiece, in a similar manner to that described in the previous example, to enable the sloping teeth 46 and 41 to co-operate with the lever springs.
- Tooth 48 prevents the comb becoming disengaged by normal handling of the springset.
- are mounted on the heelpiece and the armature is in the normal position shown, the upwardly tensioned springs 40 and 43 are carried clear of the buffer block shoulders by the lever springs.
- a two changeover springset would employ an additional downwardly tensioned contacted spring mounted above spring 44, the latter being modified to include contacts on both faces.
- the additional spring would normally rest on the buffer block and would have a long slot so as to clear tooth 48 and projection 50.
- a springset comprising two break units would in the main entail removing spring 42 and inserting a small metal distance piece in the clamped portion, in order to retain the relative positions of the other springs. Should a single contact unit, for instance a changeover, be required, it would preferably be mounted in the lower position, spring 43 would be replaced by a distance piece and the contacted lever spring 44 would be substituted by an additional spring to control the opposite end of the comb.
- both of the relays described might well employ two springsets which would be mounted one at each side of the buffer block. Furthermore it may be mentioned that the springset might well form part of a relay or other switching device not having a buffer block or the equivalent.
- a switching device having an actuating means, a plurality of elongated substantially stationary spring members and a plurality of elongated operating movable lever spring members stacked with respect to each other, each of said spring members being of generally like length and each having a contact at one end and also having a slot therein between the ends, insulator means for securing one end of each of the stacked spring members in substantially fixed position and approximately uniformly spaced from each other spring member and intermingled with respect to stationary and movable components, an elongated insulating comb having projections along one edge thereof of a number less than the number of spring members and, a smhe ine; e esseshetween them-eje tions said compbeingpositioned to passythrvough the.
Landscapes
- Physics & Mathematics (AREA)
- Electromagnetism (AREA)
- Switch Cases, Indication, And Locking (AREA)
- Telephone Set Structure (AREA)
- Contacts (AREA)
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
GB282860X | 1948-11-02 |
Publications (1)
Publication Number | Publication Date |
---|---|
US2632065A true US2632065A (en) | 1953-03-17 |
Family
ID=10273233
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
US122248A Expired - Lifetime US2632065A (en) | 1948-11-02 | 1949-10-19 | Electrical switching apparatus |
Country Status (7)
Country | Link |
---|---|
US (1) | US2632065A (it) |
BE (1) | BE491781A (it) |
CH (1) | CH282860A (it) |
DE (1) | DE825709C (it) |
FR (1) | FR997658A (it) |
GB (1) | GB651502A (it) |
NL (2) | NL149658B (it) |
Cited By (12)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US2686850A (en) * | 1950-10-26 | 1954-08-17 | Itt | General purpose relay |
US2755356A (en) * | 1950-11-21 | 1956-07-17 | Jucker Julius | Electromagnetic relays |
US2765381A (en) * | 1954-04-21 | 1956-10-02 | Siemens Brothers & Co Ltd | Contact spring assemblies |
US2779843A (en) * | 1952-12-31 | 1957-01-29 | Ericsson Telefon Ab L M | Contact spring groups for electromagnetic connecting devices for obtaining a variation of the chronological order for the contact functions of the group |
US2782270A (en) * | 1952-12-22 | 1957-02-19 | Ericsson Telefon Ab L M | Contact spring group in electromagnetic connecting apparatus |
US2791147A (en) * | 1954-04-28 | 1957-05-07 | Syndreco | Electronic music instruction device |
US2894095A (en) * | 1954-07-08 | 1959-07-07 | Ericsson Telefon Ab L M | Contact device |
US2939928A (en) * | 1958-03-05 | 1960-06-07 | Bendix Westinghouse Automotive | Fluid pressure switch |
US2939937A (en) * | 1957-02-15 | 1960-06-07 | Ericsson Telefon Ab L M | Lifting card |
US2939932A (en) * | 1956-09-01 | 1960-06-07 | Int Standard Electric Corp | Relays with guided contact spring |
US3806707A (en) * | 1970-11-12 | 1974-04-23 | Day A | Credit card terminal |
US4554520A (en) * | 1982-10-15 | 1985-11-19 | International Standard Electric Corporation | Electromagnetic miniature relay |
Citations (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US2187577A (en) * | 1939-02-21 | 1940-01-16 | Bell Telephone Labor Inc | Switching mechanism |
US2279811A (en) * | 1940-06-19 | 1942-04-14 | Bell Telephone Labor Inc | Relay |
US2282687A (en) * | 1938-06-13 | 1942-05-12 | Western Electric Co | Set of contact springs for electrical switching apparatus |
US2461360A (en) * | 1943-10-16 | 1949-02-08 | Stromberg Carlson Co | Relay |
-
0
- NL NL71972D patent/NL71972C/xx active
- NL NL696913868A patent/NL149658B/xx unknown
- BE BE491781D patent/BE491781A/xx unknown
-
1948
- 1948-11-02 GB GB28396/48A patent/GB651502A/en not_active Expired
-
1949
- 1949-10-17 FR FR997658D patent/FR997658A/fr not_active Expired
- 1949-10-19 US US122248A patent/US2632065A/en not_active Expired - Lifetime
- 1949-11-01 CH CH282860D patent/CH282860A/fr unknown
- 1949-11-03 DE DEA195A patent/DE825709C/de not_active Expired
Patent Citations (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US2282687A (en) * | 1938-06-13 | 1942-05-12 | Western Electric Co | Set of contact springs for electrical switching apparatus |
US2187577A (en) * | 1939-02-21 | 1940-01-16 | Bell Telephone Labor Inc | Switching mechanism |
US2279811A (en) * | 1940-06-19 | 1942-04-14 | Bell Telephone Labor Inc | Relay |
US2461360A (en) * | 1943-10-16 | 1949-02-08 | Stromberg Carlson Co | Relay |
Cited By (12)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US2686850A (en) * | 1950-10-26 | 1954-08-17 | Itt | General purpose relay |
US2755356A (en) * | 1950-11-21 | 1956-07-17 | Jucker Julius | Electromagnetic relays |
US2782270A (en) * | 1952-12-22 | 1957-02-19 | Ericsson Telefon Ab L M | Contact spring group in electromagnetic connecting apparatus |
US2779843A (en) * | 1952-12-31 | 1957-01-29 | Ericsson Telefon Ab L M | Contact spring groups for electromagnetic connecting devices for obtaining a variation of the chronological order for the contact functions of the group |
US2765381A (en) * | 1954-04-21 | 1956-10-02 | Siemens Brothers & Co Ltd | Contact spring assemblies |
US2791147A (en) * | 1954-04-28 | 1957-05-07 | Syndreco | Electronic music instruction device |
US2894095A (en) * | 1954-07-08 | 1959-07-07 | Ericsson Telefon Ab L M | Contact device |
US2939932A (en) * | 1956-09-01 | 1960-06-07 | Int Standard Electric Corp | Relays with guided contact spring |
US2939937A (en) * | 1957-02-15 | 1960-06-07 | Ericsson Telefon Ab L M | Lifting card |
US2939928A (en) * | 1958-03-05 | 1960-06-07 | Bendix Westinghouse Automotive | Fluid pressure switch |
US3806707A (en) * | 1970-11-12 | 1974-04-23 | Day A | Credit card terminal |
US4554520A (en) * | 1982-10-15 | 1985-11-19 | International Standard Electric Corporation | Electromagnetic miniature relay |
Also Published As
Publication number | Publication date |
---|---|
GB651502A (en) | 1951-04-04 |
CH282860A (fr) | 1952-05-15 |
FR997658A (fr) | 1952-01-09 |
NL71972C (it) | |
BE491781A (it) | |
DE825709C (de) | 1951-12-20 |
NL149658B (nl) |
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