US3222488A - Electrical switch with camming bridging contact - Google Patents

Electrical switch with camming bridging contact Download PDF

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Publication number
US3222488A
US3222488A US356277A US35627764A US3222488A US 3222488 A US3222488 A US 3222488A US 356277 A US356277 A US 356277A US 35627764 A US35627764 A US 35627764A US 3222488 A US3222488 A US 3222488A
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US
United States
Prior art keywords
contact
bridging
stationary
bridging contact
stationary contacts
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
US356277A
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English (en)
Inventor
Benjamin H Matthews
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.)
Lucerne Products Inc
Original Assignee
Lucerne Products 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
Family has litigation
First worldwide family litigation filed litigation Critical https://patents.darts-ip.com/?family=23400820&utm_source=google_patent&utm_medium=platform_link&utm_campaign=public_patent_search&patent=US3222488(A) "Global patent litigation dataset” by Darts-ip is licensed under a Creative Commons Attribution 4.0 International License.
Priority to US26267D priority Critical patent/USRE26267E/en
Application filed by Lucerne Products Inc filed Critical Lucerne Products Inc
Priority to US356277A priority patent/US3222488A/en
Priority to GB10532/65A priority patent/GB1098324A/en
Priority to NL656503621A priority patent/NL149320B/nl
Priority to LU48247A priority patent/LU48247A1/xx
Priority to DE19651540160 priority patent/DE1540160B1/de
Priority to BE661703D priority patent/BE661703A/xx
Priority to FR11227A priority patent/FR1437705A/fr
Publication of US3222488A publication Critical patent/US3222488A/en
Application granted granted Critical
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
    • H01H1/14—Contacts characterised by the manner in which co-operating contacts engage by abutting
    • H01H1/18—Contacts characterised by the manner in which co-operating contacts engage by abutting with subsequent sliding
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
    • H01H13/00—Switches having rectilinearly-movable operating part or parts adapted for pushing or pulling in one direction only, e.g. push-button switch
    • H01H13/02—Details
    • H01H13/04—Cases; Covers
    • H01H13/08—Casing of switch constituted by a handle serving a purpose other than the actuation of the switch
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
    • H01H15/00—Switches having rectilinearly-movable operating part or parts adapted for actuation in opposite directions, e.g. slide switch
    • H01H15/02—Details
    • H01H15/06—Movable parts; Contacts mounted thereon
    • H01H15/10—Operating parts
    • H01H15/102—Operating parts comprising cam devices

Definitions

  • This invention relates to improvements in an electric switch, and particularly in that kind of switch wherein a bridging contact is slidable with respect to spaced stationary contacts between a non-bridging position and a bridging position.
  • One of the objects of the present invention is to improve a slidable bridging contact as mentioned above by providing means for lifting the leading end of the bridging contact until it is at least in partial registry with one of the stationary contacts and thereafter to permit it to drop into engagement with the approached stationary contact.
  • FIG. 1 is a side elevation of this invention positioned for use in a hollow handle of a portable tool or the like, the handle itself being shown in section;
  • FIG. 2 is an end elevation of the same taken from the right-hand side of FIG. 1 and with the enclosed handle casing shown in dot-dash lines;
  • FIG. 3 is a top plan view of the device shown in FIGS. 1 and 2;
  • FIG. 4 is a bottom plan View of the same device
  • FIG. 5 is a sectional view, enlarged, taken along the line 5-5 of FIG. 4;
  • FIGS. 6 and 7 are views similar to FIG. 5 but showing different positions of the bridging contact; While FIG. 8 is a sectional view taken along the line 8-8 of FIG. 6.
  • an electrically energized tool (not shown) is mounted on a housing 10 which in the case of a portable tool may be provided with a hollow pistol grip 11 which is used herein to illustrate one use of the present invention.
  • a switch casing 12 as best seen in FIGS. l, 6 and 8, is mechanically secured in the handle 11 by any suitable means.
  • This casing is generally U-shape as viewed in FIG. 8, entirely open at the left-hand end as Viewed in FIG. 6, and open at the right-hand end at the lower half or that portion which is below an end wall 12a on the upper half of the casing.
  • a stationary contact holder 13 is entered upwardly in the open lower end of the U- shape casing 12 as best seen in FIG. 8 and is properly positioned by horizontal shoulders 14 on the casing 12 and by Vertical shoulders 15 also on the casing. The contact holder is held in proper assembled position in the casing 12 by a rivet 16 (FIG. 7) which passes through both of these members.
  • a switch actuator 16 is slidable along the upper surfaces of the contact holder 13 in and out .of an open end 12b at the upper left-hand portion of casing 12 as seen in FIG. 6.
  • This actuator is provided with a unitary trigger portion 16a for actuation by the hand of the operator gripping the pistol grip 11. It should be understood that the parts 12, 13 and 16 are made of any suitable molded electrically insulating material.
  • the stationary Contact member 13 has a central vertical partition 13a which effectively separates the two switch contact mechanisms from each other.
  • the conductors 17 enter through a suitable opening 23 in the base of the member 13 and are tack welded or otherwise suitably electrically connected respectively with the stationary contacts 19.
  • Each of the contacts 19 and 20 is of electrically conductive material which is slid into the open side of the member 13 before it is inserted in the casing 12.
  • Each stationary contact member is held in the proper position by slight shoulders 24, 24 molded rigid with the member 13 and after the stationary contacts are slid in position and the parts are assembled as shown in FIG. 8 then the contacts 19 and 20 are held from sidewise movement between the wall 13a of the member 13 and the parallel side walls of the casing 12 as shown in FIG. 8.
  • the conductor 22 enters through a suitable opening 25 in the base of member 13 and has its conductive member tack welded or otherwise suitably secured to the xed contact 20.
  • the actuator 16 has two parallel elongated slots 26 which are just long enough to receive a bridging Contact 27 in each slot capable of Very little movement endwise of the slot but capable of movement vertically as viewed in FIGS. 6 and 8.
  • a compression spring 28 urges each bridging contact toward the coacting stationary contacts.
  • each bridging contact has projecting contact-making ends 27a having approximately the same spacing as that between the stationary contacts 19 and 20.
  • Each bridging contact has a centrally located recess 27b for a purpose presently to be described.
  • portions of each bridging contact are cut away as shown at 27e between each projection 27a and the recess 27b.
  • an interrupted horizontal wall is ⁇ formed integrally with the partition 13a and the end walls 13C.
  • the partition wall 13b is interrupted to receive the contacts 19 and 20.
  • Midway of this wall is an upwardly extending projection 29 which coacts with the bottom edge of the associated bridging contact 27 in a manner about to be described.
  • spring pressed plunger 30 adapted, when pushed inwardly to place a pin in the notch 31 in the actuator 16 when it is desired to hold the actuator in switch closing position.
  • the actuator is first moved to the position of FTG. 6, then the plunger 30 is pressed inwardly and the trigger member 16a is released whereupon the spring 32 which normally urges the actuator to switch-open position presses the actuator 16 against the spring pressed plunger and holds it in its depressed position.
  • the next pressure upon the trigger member 16a releases the spring pressed plunger 30 so that it jumps outwardly and releases the switch.
  • the parts are so constructed that the trailing end of the bridging contact engages its associated stationary contact before the leading end drops onto its coacting stationary contact. Therefore, arcing occurs at the leading contact only which gets hot while the trailing Contact remains cool.
  • the projection 29 holds the leading end 27a of the bridging contact at all times out of engagement with the base 13b, as seen in FIGS. 5 and 7. During the opening of the circuit, the contacts at the right in FTG. 6 break before the contacts at the left disengage.
  • the projection 29 and the shape of recess 27h are designed to reduce contact bounce
  • the portions 29a are inclined upwardly and toward each other at a gentle angle of about 15 to 20 to the horizontal.
  • Each portion 29a starts near a stationary contact Zt and ends at the central projection 29 which is arcuate and about 1/32 to 1%4 inch in lateral extent in the direction of bridging Contact movement.
  • the corners of recess 27h are rounded as shown at 27d.
  • a button 12e integral with casing 12, prevents movement of member lo too tar to the left in FTG. 5, under the urging of spring 32.
  • an electric switch in combination, an insulator base, at least a pair of spaced stationary contacts mounted on said base with their contact-making faces coplanar, an electrically conductive bridging contact having opposite contacting ends spaced at approximately the same spacing as said stationary contacts, there being a recess in said bridging contact between said ends extending away from said flat surface, means supporting said bridging Contact for linear sliding movement in line with said stationary contacts between a non-bridging position, where said ends lie respectively on the same side of associated stationary contacts and out of engagement therewith, and a bridging position where said ends engage said stationary contacts respectively, a projection on said base between said stationary contacts in engagement with said bridging contact as the leading contacting end thereof approaches the to-be-contacted stationary contact, said projection camming said bridging contact to lift said leading contacting end during said movement to a level above the contact-making face ot the to-be-contacted stationary contact, said recess being formed on said bridging Contact as to register with said projection only after said leading contacting end

Landscapes

  • Push-Button Switches (AREA)
US356277A 1964-03-31 1964-03-31 Electrical switch with camming bridging contact Expired - Lifetime US3222488A (en)

Priority Applications (8)

Application Number Priority Date Filing Date Title
US26267D USRE26267E (en) 1964-03-31 Electrical switch with camming bridging contact
US356277A US3222488A (en) 1964-03-31 1964-03-31 Electrical switch with camming bridging contact
GB10532/65A GB1098324A (en) 1964-03-31 1965-03-12 Electrical switches
NL656503621A NL149320B (nl) 1964-03-31 1965-03-22 Elektrische schuifschakelaar.
LU48247A LU48247A1 (nl) 1964-03-31 1965-03-23
DE19651540160 DE1540160B1 (de) 1964-03-31 1965-03-24 Elektrischer Schalter mit laengsverschiebbarer Kontaktbruecke
BE661703D BE661703A (nl) 1964-03-31 1965-03-26
FR11227A FR1437705A (fr) 1964-03-31 1965-03-30 Commutateur électrique

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
US356277A US3222488A (en) 1964-03-31 1964-03-31 Electrical switch with camming bridging contact

Publications (1)

Publication Number Publication Date
US3222488A true US3222488A (en) 1965-12-07

Family

ID=23400820

Family Applications (2)

Application Number Title Priority Date Filing Date
US26267D Expired USRE26267E (en) 1964-03-31 Electrical switch with camming bridging contact
US356277A Expired - Lifetime US3222488A (en) 1964-03-31 1964-03-31 Electrical switch with camming bridging contact

Family Applications Before (1)

Application Number Title Priority Date Filing Date
US26267D Expired USRE26267E (en) 1964-03-31 Electrical switch with camming bridging contact

Country Status (6)

Country Link
US (2) US3222488A (nl)
BE (1) BE661703A (nl)
DE (1) DE1540160B1 (nl)
GB (1) GB1098324A (nl)
LU (1) LU48247A1 (nl)
NL (1) NL149320B (nl)

Cited By (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3415966A (en) * 1967-05-08 1968-12-10 Lucerne Products Inc Electrical switch with improved bridge contactor
US3598934A (en) * 1969-07-07 1971-08-10 Black & Decker Mfg Co Multiple pole switch for producing simultaneous opposite switching operations
US3649794A (en) * 1970-07-13 1972-03-14 Outboard Marine Corp One-piece ignition switch for small internal combustion engines
US4064380A (en) * 1976-02-25 1977-12-20 Lucerne Products, Inc. Movable contact carrier for an electrical control
JPS5397379U (nl) * 1971-04-01 1978-08-08
US4256942A (en) * 1978-11-27 1981-03-17 Lucerne Products, Inc. Trigger operated tool handle switch
US4705920A (en) * 1986-04-08 1987-11-10 Lucerne Products, Inc. Electrical switch with rocker actuator having removable locking key
US20130193110A1 (en) * 2012-01-27 2013-08-01 Johnson Electric S.A. Contact arrangement for high-power electrical switching

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3594523A (en) * 1969-05-08 1971-07-20 Skil Corp Electric switch with bridging contact
DE3045128A1 (de) * 1980-11-29 1982-07-01 SWF-Spezialfabrik für Autozubehör Gustav Rau GmbH, 7120 Bietigheim-Bissingen Elektrischer schalter, insbesondere lenkstockschalter fuer kraftfahrzeuge

Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2751468A (en) * 1952-05-27 1956-06-19 Gen Motors Corp Switch
US2966560A (en) * 1958-11-26 1960-12-27 Ind Electronic Hardware Corp Slide switch

Family Cites Families (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DD7809A (nl) *
DE1736667U (de) * 1954-07-31 1956-12-27 Tschudin & Heid A G Elektrischer schalter.
DE1012353B (de) * 1954-09-06 1957-07-18 Voigt & Haeffner Ag Elektrischer Kippschalter

Patent Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2751468A (en) * 1952-05-27 1956-06-19 Gen Motors Corp Switch
US2966560A (en) * 1958-11-26 1960-12-27 Ind Electronic Hardware Corp Slide switch

Cited By (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3415966A (en) * 1967-05-08 1968-12-10 Lucerne Products Inc Electrical switch with improved bridge contactor
US3598934A (en) * 1969-07-07 1971-08-10 Black & Decker Mfg Co Multiple pole switch for producing simultaneous opposite switching operations
US3649794A (en) * 1970-07-13 1972-03-14 Outboard Marine Corp One-piece ignition switch for small internal combustion engines
JPS5397379U (nl) * 1971-04-01 1978-08-08
US4064380A (en) * 1976-02-25 1977-12-20 Lucerne Products, Inc. Movable contact carrier for an electrical control
US4256942A (en) * 1978-11-27 1981-03-17 Lucerne Products, Inc. Trigger operated tool handle switch
US4705920A (en) * 1986-04-08 1987-11-10 Lucerne Products, Inc. Electrical switch with rocker actuator having removable locking key
US20130193110A1 (en) * 2012-01-27 2013-08-01 Johnson Electric S.A. Contact arrangement for high-power electrical switching

Also Published As

Publication number Publication date
NL149320B (nl) 1976-04-15
DE1540160B1 (de) 1970-05-14
GB1098324A (en) 1968-01-10
USRE26267E (en) 1967-09-26
LU48247A1 (nl) 1965-05-24
BE661703A (nl) 1965-09-27
NL6503621A (nl) 1965-10-01

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