GB1603258A - Creación de Inventos y Patentes con Inteligencia Artificial

GB1603258A – Contact device
– Google Patents

GB1603258A – Contact device
– Google Patents
Contact device

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Info

Publication number
GB1603258A

GB1603258A
GB25123/78A
GB2512378A
GB1603258A
GB 1603258 A
GB1603258 A
GB 1603258A
GB 25123/78 A
GB25123/78 A
GB 25123/78A
GB 2512378 A
GB2512378 A
GB 2512378A
GB 1603258 A
GB1603258 A
GB 1603258A
Authority
GB
United Kingdom
Prior art keywords
contact
portions
strips
another
bus bars
Prior art date
1977-06-08
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

Application number
GB25123/78A
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.)

Hazemeijer BV

Original Assignee
Hazemeijer BV
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.)
1977-06-08
Filing date
1978-05-31
Publication date
1981-11-25

1978-05-31
Application filed by Hazemeijer BV
filed
Critical
Hazemeijer BV

1981-11-25
Publication of GB1603258A
publication
Critical
patent/GB1603258A/en

Status
Expired
legal-status
Critical
Current

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Classifications

H—ELECTRICITY

H01—ELECTRIC ELEMENTS

H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES

H01H1/00—Contacts

H01H1/12—Contacts characterised by the manner in which co-operating contacts engage

H01H1/36—Contacts characterised by the manner in which co-operating contacts engage by sliding

H01H1/42—Knife-and-clip contacts

H—ELECTRICITY

H01—ELECTRIC ELEMENTS

H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES

H01H1/00—Contacts

H01H1/50—Means for increasing contact pressure, preventing vibration of contacts, holding contacts together after engagement, or biasing contacts to the open position

H01H1/54—Means for increasing contact pressure, preventing vibration of contacts, holding contacts together after engagement, or biasing contacts to the open position by magnetic force

H—ELECTRICITY

H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER

H02G—INSTALLATION OF ELECTRIC CABLES OR LINES, OR OF COMBINED OPTICAL AND ELECTRIC CABLES OR LINES

H02G5/00—Installations of bus-bars

H02G5/06—Totally-enclosed installations, e.g. in metal casings

H02G5/08—Connection boxes therefor

H—ELECTRICITY

H01—ELECTRIC ELEMENTS

H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES

H01H1/00—Contacts

H01H1/12—Contacts characterised by the manner in which co-operating contacts engage

H01H1/36—Contacts characterised by the manner in which co-operating contacts engage by sliding

H01H1/42—Knife-and-clip contacts

H01H2001/425—Knife-and-clip contacts with separate contact pressure spring confined between two contact knifes and urging the knifes onto a mating contact

Description

PATENT SPECIFICATION
00 t ( 21) Application No 25123/78 ( 22) Filed 31 May 1978 C ( 31) Convention Application No 7706308 e ( 32) Filed 8 June 1977 IN ( 33) Netherlands (NL) ( 44) Complete Specification Published 25 November 1981 ( 51) INT CL 3 HOIR 13/15 ( 52) Index at Acceptance H 2 E 126 CHA CJ HAA ( 54) CONTACT DEVICE ( 71) We, HAZEME 1 JER B V, a Dutch body corporate, of Tuindorpstraat 61, Hengelo, the Netherlands, do hereby declare the invention for which we pray that a patent may be granted to us, and the method by which it is to be performed, to be particularly described in and by the following statement:-
The invention relates to a contact device for connecting a contact blade of an apparatus to two parallel running bus bars or to at least one bus bar having a longitudinal space with two parallel inner walls, said contact device comprising a self-adjusting contact means for insertion into the space between the two bus bars or walls, in which said contact means comprises a pair of opposed contact strips each having a front portion, which are urged away from one another by biassing means such that each front portion rests in use under pressure against one of the walls of the said space, and elongate connection portions, extending in use beyond the said space, each of which connection portions being, in use, in contact with a respective one of the lateral surfaces of the contact blade, in use of the device, at the ends of the contact strips remote from said front portions.
What is meant by «self-adjusting» is that the contact means are to some degree tolerant of positional discrepancies of the contact blades or fingers relative to the equilibrium positions of the contact means.
Such a contact device is known from Dutch Patent Application No 7606053 With this known contact device the contact blades extending from the reverse side of an apparatus to be connected are provided with contact means, comprising one or more strip-shaped contact members which are bent in U-shape around these contact blades, said contact members being connected mechanically as well as electrically to the contact blade by means of a bolt connection The U-shaped contact member is shaped such that the closed side of the U-shape is not completely circular but is tapered somewhat to the centre so that the insertion of the ( 11) 1 603 258 contact device into a space between opposed bus bars is made easier Further the inner sides of the upstanding legs of the U-shape do not directly engage the contact blade over their entire length but at both sides of the contact 50 blade some space is left between this contact blade and the legs of the U-shape over a portion of the length of the upstanding legs and besides this the distance measured over the outside of the upstanding legs of the U-shape 55 is larger than the spacing between the bus bars into which the contact device is to be pressed.
In this manner the required contact pressure is obtained by the elasticity of the U 60 shaped contact member The advantage of such a contact device is that groups of a distribution installation can be altered or replaced simply and quickly without undue delay.
An important disadvantage of the above 65 mentioned contact device, however, is that in the case of a heavily increasing current, in particular a short circuit current, the contact pressure can be decreased such that an interruption with arc discharge occurs, by which the 70 contacts can be welded to the bus bars This may result in a long breakdown in order to replace the damaged bus bars The reduction in the contact pressure is caused by the parallel flowing currents in the legs of the U-shaped 75 contact member by which a force is generated in these legs drawing the legs towards each other A further disadvantage of the known device is that a good centering of the removable group with respect to the spacing between the 80 bus bars, whcih is very important for a good contact, may disappear gradually When this happens, the legs of the U-shaped contact member can be pressed against the bus bars with dissimilar forces and, in the worst case, 85 one leg may come completely free fromthe bus bar, so that the quality of the contact is very adversely affected.
An object of the present invention is to eliminate said disadvantages by providing a contact 90 1 603 258 device in which the current flowing therethrough induces an increasing contact force, which contact force further is sustained within broader positional limits so that it is not dependent upon exact centering of the contact blade or finger with respect to the spacing between the rails.
The contact device of the present invention is of the type mentioned hereinbefore and is characterised in that each of said front portions extends away from the other in order that the outer surfaces of said front portions may contact said walls and that each front contact strip portion is integral with the associated connection portion and connected to it by means of an intermediate portion, each said connection portion comprising a straight portion having at least the length of the front portions, said connection portions running mainly parallel with each other, the free ends of said connection portions being bent in directions towards one another for contact with the lateral surfaces of said contact blade, in which the contact strips are of like shape and are positioned mirrorsymmetrically to one another to pivot relative to one another hinge-like at their respective intermediate portions, so that the surfaces of the connection portions are urged towards one another in contact with the contact blade by the same biassing means which urges the front portions away from one another.
Welding together of contacts can be resisted further by shaping the contact strip members so that each contact member contacts the bus bar at two points on protruding surface portions and contacts the contact blade in one point on a further protruding contact portion In view of the fact that the allowable current through the contact device is not proportional to the contact force a higher current is allowed at the points in contact with the bus bar (by dividing the same contact force over two points in two protruding portions) than at the single point of contact with the contact blade This means that welding together, if any, will take place at the side of the contact blade, causing a shorter breakdown than would be the case if the contact strips were to become welded to the bus bar.
The contact device according to the invention can be made such that the two contact strips are secured against axial movement by locating the strips in a housing which is fixedly mounted in use with respect to the bus bars, said housing being made of insulating material and comprising a slot for receiving the contact blade Such a housing may be mounted at any desired position with respect to the bus bars, so that a branching can be provided at any point of the bus bars.
Preferably the bus bars are housed in a casing of insulating material which has a longitudinal slot for receiving the front contact strip portions of the contact bodies When a housing is provided, it may be mounted against the casing or front wall This avoids the need for the contact devices provided for a given apparatus to be individually adjusted to this apparatus To make the contact device suitable for a given current intensity apparatus one may employ either a broader contact device of appropriate 70 pre-selected width or several parallel juxtaposed contact devices with equal width.
The necessary contact pressure can be obtained by means of one or more tension springs or by means of one or more compression springs 75 Now the invention will be further described by means of the drawings, in which an examplary embodiment is shown In the drawings:
Figure 1 shows a longitudinal section of a contact device according to the invention; and 80 Figure 2 shows a perspective view of a contact body of the contact device according to the invention.
In Figure 1 a housing 1 encloses two contact bodies 2 by means of a contact support par 85 tition 6 the housing 1 is connected to a panel so that front contact portions 8 of the contact bodies 2, extending from the front side of the housing 1, engages bus bars 4 The contact with the apparatus to be connected is obtained by 90 means of contact blades or fingers 3 which are connected to the apparatus to be connected and can be inserted between bent ends 9 of connection portions 7 of the contact body 2.
By means of a spring 5 a sufficient contact 95 force can be applied As shown, the spring 5 can be formed as a tension spring It is, however, also possible to obtain the contact force by means of plate springs or compression springs, while also the connection strip portions 7 can 100 be curved towards one another so that they provide the spring contact pressure themselves.
As appears from Figure 1 the connection strip portions 7 of both contact bodies 2 run parallel over a substantial part of their length 105 When a current flows from the bus bars 4 to the contact blade 3 of the apparatus to be connected via the contact bodies 2 then this current will divide itself into two equal currents flowing through the two contact bodies 2 Because 110 these two currents are flowing in the same direction the two contact bodies 2 will be drawn towards each other so that the contact force between the bus bars 4 and the bent front end portions 8 of the contact bodies 2 as well as 115 that between the contact blade 3 and the bent ends 9 of the connection strip portions 7 of the contact bodies 2 is increased To intensify the effect of this increasing contact force phenomenon the contact bodies 2 can be pos 120 itioned very close alongside of each other over a considerable part of their length.
In Figure 2 a possible embodiment of a contact body 2 is shown As appears from this Figure 2, the connection strip portion 7 as well 125 as the front end contact portion 8 of the contact body 2 is provided with arcuate parts 9.
These arcuate parts 9 ensure that a good contact is guaranteed even in case of a slight deviation from the normal centred position of the 130 1 603 258 parts involved in the contact.
Figure 2 also shows that the contact bodies 2 are provided with a slot 10, with which these contact bodies 2 can be inserted into one another For that purpose an opposite contact body of the pair of contact bodies to be coupled, which completely corresponds with the contact body 2, shown in Figure 2, but which is rotated through 1800 with respect to the shown position of the contact body 2, is provided so that the two slots 10 are positioned opposite each other, whereupon these bodies can be inserted into one another.
Finally, Figure 2 shows a pin 11 which is to be inserted into a bore provided in the housing and prevents the contact bodies 2 from leaving the housing 1.

Claims (6)

WHAT WE CLAIM IS:-

1 Contact device for connecting a contact blade of an apparatus of two parallel running bus bars or to at least one bus bar having a longitudinal space with two parallel inner walls, said contact device comprising a selfadjusting contact means for insertion into the space between the two bus bars or walls, in which said contact means comprises a pair of opposed contact strips each having a front portion, which are urged away from one another by biassing means such that each front portion rests in use under pressure against one of the walls of the said space, and elongate connection portions, extending in use beyond said space, each of which connection portions being in use in contact with a respective one of the lateral surfaces of the contact blade, in use of the device, at the ends of the contact strips remote from said front portions, characterised in that each of said front portions extends away from the other in order that outer surfaces of said front portions may contact said walls and that each front contact strip portion is integral with the associated connection portion and connected to it by means of an intermediate portion, each said connection portion comprising a straight portion having at least the length of the front portions, said connection portions running mainly parallel with each other, the free ends of said connection portions being bent in-direction towards one another for contact with the lateral surfaces of said contact blade, in which the contact strips are of like shape and are positioned mirror-symmetrically to one another to pivot relative to one another hinge-like at their respective intermediate portions, so that the surfaces of the connection portions are urged towards one another in contact with the contact blade by the same biassing means which urges the front portions away from one another.

2 Contact device as claimed in claim 1, characterised in that a hinge connection of the two like contact strips is obtained by means of slots in the intermediate portions thereof extending perpendicular to the longitudinal directions of the strips, said strips engaging with one another by means of said slots, the depth of each slot being of such length that the total width of the engaged strips does not exceed the width of each strip.

3 Contact device as claimed in claim 1 or 2, characterised in that the contact strips are formed such that each contact strip is, in use, in contact with the bus bars at two points formed by two protruding surface portions of the strips and is in contact with the contact blade at a single point, formed by a protruding surface portion of the strip.

4 Contact device as claimed in claim 1, 2 or 3, and, connected to two parallel running bus bars, or to at least one bus bar having a longitudinal space with, two parallel inner walls characterised in that the two contact strips are secured against axial movement by location in a housing which is fixedly mounted with respect to the bus bar, said housing being made of insulating material and comprising a slot for receiving the contact blade.

Contact device as claimed in claim 4, in which the bus bar is, or bus bars are, housed in a casing of insulating material or are shielded off by a front wall of insulating material comprising a longitudinal slot for receiving the said front portions of the contact strips, characterised in that the housing is mounted to the casing or front wall.

6 Contact device substantially as hereinbefore described with reference to the accompanying drawing.
BREWER & SON, Quality House, 5-9 Quality Court, Chancery Lane, London, W C 2.
Printed for Her Majesty’s Stationery Office by MULTIPLEX techniques ltd, St Mary Cray, Kent 1981 Published at the Patent Office, 25 Southampton Buildings, London WC 2 l AY, from which copies may be obtained.

GB25123/78A
1977-06-08
1978-05-31
Contact device

Expired

GB1603258A
(en)

Applications Claiming Priority (1)

Application Number
Priority Date
Filing Date
Title

NL7706308.A

NL165339C
(en)

1977-06-08
1977-06-08

CONTACT DEVICE.

Publications (1)

Publication Number
Publication Date

GB1603258A
true

GB1603258A
(en)

1981-11-25

Family
ID=19828682
Family Applications (1)

Application Number
Title
Priority Date
Filing Date

GB25123/78A
Expired

GB1603258A
(en)

1977-06-08
1978-05-31
Contact device

Country Status (12)

Country
Link

US
(1)

US4227596A
(en)

BE
(1)

BE867936A
(en)

CA
(1)

CA1104685A
(en)

DE
(1)

DE2825201C2
(en)

DK
(1)

DK253678A
(en)

ES
(1)

ES470584A1
(en)

FR
(1)

FR2394194A1
(en)

GB
(1)

GB1603258A
(en)

IT
(1)

IT1192329B
(en)

NL
(1)

NL165339C
(en)

NO
(1)

NO781977L
(en)

SE
(1)

SE420782B
(en)

Cited By (1)

* Cited by examiner, † Cited by third party

Publication number
Priority date
Publication date
Assignee
Title

GB2268843A
(en)

1992-07-16
1994-01-19
Gec Alsthom Equip Basse Tens
A connecting clamp

Families Citing this family (11)

* Cited by examiner, † Cited by third party

Publication number
Priority date
Publication date
Assignee
Title

DE8018414U1
(en)

1980-07-09
1980-10-16
Paul Vahle Gmbh & Co Kg, 4618 Kamen

INSULATED TRACK

DE3101532C2
(en)

1981-01-15
1984-11-29
Siemens AG, 1000 Berlin und 8000 München

Plug-in base for low-voltage circuit breakers

SE429178B
(en)

1981-12-23
1983-08-15
Asea Ab

PLUG CONNECTOR

CH659538A5
(en)

1983-04-28
1987-01-30
Bbc Brown Boveri & Cie

CONTACT ARRANGEMENT.

GB9020002D0
(en)

1990-09-13
1990-10-24
Amp Holland
Card reader

DE4127708A1
(en)

1991-08-20
1993-02-25
Siemens Ag

DISCONNECTING ARRANGEMENT FOR A SLIDING DEVICE CARRIER

DE4434072A1
(en)

1994-09-23
1996-03-28
Siemens Ag
Electrical connector for turbo generator winding lead

US5716206A
(en)

1995-01-05
1998-02-10
Sumitomo Wiring Systems, Ltd.
Apparatus for heating a wire connection or connector

US5725393A
(en)

1996-09-23
1998-03-10
S. C. Johnson & Son, Inc.
Electrical connector with variable plug retention mechanism

CN102637969B
(en)

2012-05-03
2014-03-12
刘杰
Socket

US10985487B2
(en)

2019-07-15
2021-04-20
Abb Schweiz Ag
Electrical connector between a bus and a circuit breaker

Family Cites Families (15)

* Cited by examiner, † Cited by third party

Publication number
Priority date
Publication date
Assignee
Title

DE274080C
(en)

1913-11-22

US2254914A
(en)

1939-09-09
1941-09-02
Westinghouse Electric & Mfg Co
Disconnecting contact

US2283657A
(en)

1940-05-02
1942-05-19
Gen Electric
Electric circuit breaker

DE1087231B
(en)

1957-06-07
1960-08-18
Licentia Gmbh

Contact unit formed from finger contacts, knife contact and slip ring

US3087039A
(en)

1961-07-14
1963-04-23
Amalgamated Electric Corp Ltd
Electrical contact bridging assembly

DE1183576B
(en)

1962-08-10
1964-12-17
Preh Elektro Feinmechanik

Resilient contact bridge with bilateral contact for key switches and Like. With blade contacts

US3170747A
(en)

1964-01-30
1965-02-23
Ite Circuit Breaker Ltd
Parallel distribution duct structure

DE1490519B1
(en)

1964-02-19
1970-08-06
Siemens Ag

HOLDING DEVICE FOR CIRCUIT COMPONENTS

GB1123067A
(en)

1965-10-21
1968-08-14
English Electric Co Ltd
Improvements in electrical contact assemblies

DE1790182C3
(en)

1968-09-25
1974-11-28
Siemens Ag, 1000 Berlin Und 8000 Muenchen

Limited mobility electrical high-voltage plug connection

NL158644B
(en)

1969-03-25
1978-11-15
Hazemeijer Bv

ELECTRIC SWITCH WITH ELECTRODYNAMIC INCREASE IN CONTACT PRESSURE AND SWITCH-OFF SPEED.

US3602680A
(en)

1970-04-21
1971-08-31
Westinghouse Electric Corp
Switch contact structure

US3749858A
(en)

1971-01-11
1973-07-31
Merlin Gerin
Device for current collecting with separate contact shoes

FR2164472B1
(en)

1971-12-21
1974-06-07
Alsthom Cgee

JPS586363B2
(en)

1977-02-28
1983-02-04
日本航空株式会社

Current collector for running body

1977

1977-06-08
NL
NL7706308.A
patent/NL165339C/en
not_active
IP Right Cessation

1978

1978-05-31
GB
GB25123/78A
patent/GB1603258A/en
not_active
Expired

1978-06-06
FR
FR787816866A
patent/FR2394194A1/en
active
Granted

1978-06-06
IT
IT68299/78A
patent/IT1192329B/en
active

1978-06-06
NO
NO781977A
patent/NO781977L/en
unknown

1978-06-07
DK
DK253678A
patent/DK253678A/en
not_active
Application Discontinuation

1978-06-07
US
US05/913,470
patent/US4227596A/en
not_active
Expired – Lifetime

1978-06-07
ES
ES470584A
patent/ES470584A1/en
not_active
Expired

1978-06-08
SE
SE7806693A
patent/SE420782B/en
unknown

1978-06-08
BE
BE188421A
patent/BE867936A/en
not_active
IP Right Cessation

1978-06-08
CA
CA305,056A
patent/CA1104685A/en
not_active
Expired

1978-06-08
DE
DE2825201A
patent/DE2825201C2/en
not_active
Expired

Cited By (3)

* Cited by examiner, † Cited by third party

Publication number
Priority date
Publication date
Assignee
Title

GB2268843A
(en)

1992-07-16
1994-01-19
Gec Alsthom Equip Basse Tens
A connecting clamp

ES2078156A2
(en)

1992-07-16
1995-12-01
Gec Alsthom Equip Basse Tens
A connecting clamp

GB2268843B
(en)

1992-07-16
1996-02-28
Gec Alsthom Equip Basse Tens
A connecting clamp

Also Published As

Publication number
Publication date

CA1104685A
(en)

1981-07-07

ES470584A1
(en)

1979-02-01

SE420782B
(en)

1981-10-26

DE2825201C2
(en)

1982-05-06

NL165339B
(en)

1980-10-15

NO781977L
(en)

1978-12-11

BE867936A
(en)

1978-12-08

NL165339C
(en)

1981-03-16

NL7706308A
(en)

1978-12-12

SE7806693L
(en)

1978-12-09

US4227596A
(en)

1980-10-14

DK253678A
(en)

1978-12-09

FR2394194B1
(en)

1982-04-09

IT7868299D0
(en)

1978-06-06

FR2394194A1
(en)

1979-01-05

IT1192329B
(en)

1988-03-31

DE2825201A1
(en)

1978-12-14

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