US3082399A - Contact jaw for a blade contact - Google Patents

Contact jaw for a blade contact Download PDF

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Publication number
US3082399A
US3082399A US17657A US1765760A US3082399A US 3082399 A US3082399 A US 3082399A US 17657 A US17657 A US 17657A US 1765760 A US1765760 A US 1765760A US 3082399 A US3082399 A US 3082399A
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US
United States
Prior art keywords
contact
pressure
springs
blade
plates
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
US17657A
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English (en)
Inventor
Brandhorst Willem
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.)
FARBRIEK VAN ELECTRISCHE APP N
Nv Farbriek Van Electrische Apparaten Voorheen F Hazemeijer & Co
Original Assignee
FARBRIEK VAN ELECTRISCHE APP N
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 FARBRIEK VAN ELECTRISCHE APP N filed Critical FARBRIEK VAN ELECTRISCHE APP N
Application granted granted Critical
Publication of US3082399A publication Critical patent/US3082399A/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
    • 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

Definitions

  • the invention relates to a contact jaw for a blade con tact, comprising two springs-loaded, nearly parallel contact plates which extend into two extensions with a gradually increasing distance and which merge 1nto a basepart that is nearly perpendicular to the contact plates.
  • Such a contact jaw is known from the German patent specification No. 953,717.
  • the spring pressure is provided by thin C-shaped springs. This has, however, the disadvantage that these springs, apart from being quite costly, cannot provide a great pressure, so that the necessary contact pressure must be provided bythe elasticity of the material of the contact jaws and their extensions, which therefore must be unnecessarily heavy.
  • the invention aims to do away with these disadvantages and to this end the spring pressure is supplied by one or more twisted plate springs, the torsion of which furnishes the spring pressure. These springs are positioned in the space between the extensions and the base plate. Further there are provided two or more pressure members, coupled to the respective contact plates and positioned nearly perpendicular to these plates, while each one of these members is provided with a slot through which the plates springs run.
  • each pressure member being provided with a slot, perpendicular through which the springs run, while the extensions of the contact plates are provided with longitudinal slots, namely in the one plate near the edges and in the other plate near the centre, each of these slots guiding a pressure member which rests with the one, not slotted cross-leg against the plate while the other leg extends into the space between the extensions and the base plate, the plate springs running through the aligned slots while the ends of the springs are twisted with regard to the centre through a certain angle that depends upon the desired spring pressure.
  • both the short edges of the springs are provided with a small extension that is parallel to these edges.
  • FIGURE 1 shows the use of the novel contact jaw in a fuse-base while the FIGURES 2 and 3 show the mutual position of the pressure members.
  • the contact jaw comprises two parallel contact plates 1 with extensions 2 which merge into the base plate 3. These three parts are, together with the terminal strips 4, made in one piece.
  • the extensions 2 are provided with longitudinal slots 5 and 6, the slots 5 lying near the edges ofone extension while the slot 6 lies approximately at the centre of the opposite extension.
  • These slots guide the pressure me m bers 7, each one of which, as is also shown in FIGURES 2 and 3, comprises a slot 8.
  • Two plate springs 9 are thrust through the slots 8 in the pressure members 7.
  • the contact plates may be pressed together before the springs are brought into place while it is also possible to make use of a hole, made in one of the contact plates, as is the case with the left contact jaw in FIGURE 1.
  • FIGURE 2 shows a perspective view of the pressure members 7 with the springs. It is clear that, when the distance between the heads 7 of the pressure members increases the ends of the springs 7 will be twisted with respect to the centre of the spring.
  • FIGURE 3 shows a side view of the pressure members; this figure needs no further explanation.
  • the slot 8 has a particular shape; it consists namely of two parallel parts, which are shifted with respect to each other. This particular shape makes it easy to bring the springs 9 into place. By forming the short outer edges of the springs 9 with a small extension the spring is prevented from moving out of the slot.
  • a contact jaw for a blade contact comprising two spring-loaded substantially parallel contact plates which extend into two extensions with a gradually increasing distance and which merge into a base plate substantially perpendicular to the contact plates, at least one twisted blade spring positioned in the space between the extensions and the base plate, and two or more pressure members coupled to the respective contact plates and positio ned substantially perpendicular to said plates, each of said pressure members being provided with a slot accommodating the blade spring so as to bias the pressure members toward the contact plates.
  • a device having three flat C-shaped pressure members having a back portion and two terminal cross-leg portions, one cross-leg of each pressure member being one of these slots guiding a pressure member which rests with one cross-leg against the contact plate while the other cross-leg extends into the space between the extensions and the base plate, the spring running through the aligned slots in the pressure members, while the ends of the spring are twisted with respect to the centre through a certain angle that depends upon the desired spring pressure.

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  • Contacts (AREA)
US17657A 1959-03-26 1960-03-25 Contact jaw for a blade contact Expired - Lifetime US3082399A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
NL3082399X 1959-03-26

Publications (1)

Publication Number Publication Date
US3082399A true US3082399A (en) 1963-03-19

Family

ID=19876987

Family Applications (1)

Application Number Title Priority Date Filing Date
US17657A Expired - Lifetime US3082399A (en) 1959-03-26 1960-03-25 Contact jaw for a blade contact

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US (1) US3082399A (no)
NL (2) NL237552A (no)

Cited By (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3378665A (en) * 1966-01-07 1968-04-16 Lucas Industries Ltd Fuse holders
US3423723A (en) * 1967-02-13 1969-01-21 Murray Mfg Corp Jaw construction for bladejaw contacts
US3598949A (en) * 1969-05-09 1971-08-10 Chi Tsan Hung Switch break jaw and spring means
US5118314A (en) * 1991-05-07 1992-06-02 Gould, Inc. Fuse holder
US6159057A (en) * 1998-11-02 2000-12-12 Litton Systems, Inc. High current connector using tuning fork contacts
US20050142956A1 (en) * 2003-12-30 2005-06-30 Wen Liang Fuse holder

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
NL8204297A (nl) 1982-11-05 1984-06-01 Hazemeijer Bv Tegenkontakt, in het bijzonder voor een meskontakt van een mespatroon en werkwijze voor het vervaardigen hiervan.

Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US753381A (en) * 1904-03-01 Benno vom eigen
US1838406A (en) * 1930-02-14 1931-12-29 Oscar H Jung Fuse clamp
US2402491A (en) * 1944-06-10 1946-06-18 Connecticut Electric Mfg Compa Fuse clip
FR1140583A (fr) * 1955-05-13 1957-07-29 Gardy Particip App Perfectionnements aux mâchoires des appareils de connexion électrique à couteau
US2821942A (en) * 1951-09-25 1958-02-04 Unitcast Corp Round bottom end doors for drop end gondola cars

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US753381A (en) * 1904-03-01 Benno vom eigen
US1838406A (en) * 1930-02-14 1931-12-29 Oscar H Jung Fuse clamp
US2402491A (en) * 1944-06-10 1946-06-18 Connecticut Electric Mfg Compa Fuse clip
US2821942A (en) * 1951-09-25 1958-02-04 Unitcast Corp Round bottom end doors for drop end gondola cars
FR1140583A (fr) * 1955-05-13 1957-07-29 Gardy Particip App Perfectionnements aux mâchoires des appareils de connexion électrique à couteau

Cited By (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3378665A (en) * 1966-01-07 1968-04-16 Lucas Industries Ltd Fuse holders
US3423723A (en) * 1967-02-13 1969-01-21 Murray Mfg Corp Jaw construction for bladejaw contacts
US3598949A (en) * 1969-05-09 1971-08-10 Chi Tsan Hung Switch break jaw and spring means
US5118314A (en) * 1991-05-07 1992-06-02 Gould, Inc. Fuse holder
US6159057A (en) * 1998-11-02 2000-12-12 Litton Systems, Inc. High current connector using tuning fork contacts
US20050142956A1 (en) * 2003-12-30 2005-06-30 Wen Liang Fuse holder
US6932658B2 (en) * 2003-12-30 2005-08-23 Wen Liang Fuse holder

Also Published As

Publication number Publication date
NL237552A (no)
NL98321C (no)

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