US3578929A - Slider switch with adjustable abutment on frame, and stationary contact faces with an angle greater than 180{20 {0 therebetween bridged by a fork shaped bridging contact - Google Patents

Slider switch with adjustable abutment on frame, and stationary contact faces with an angle greater than 180{20 {0 therebetween bridged by a fork shaped bridging contact Download PDF

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Publication number
US3578929A
US3578929A US697885A US3578929DA US3578929A US 3578929 A US3578929 A US 3578929A US 697885 A US697885 A US 697885A US 3578929D A US3578929D A US 3578929DA US 3578929 A US3578929 A US 3578929A
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US
United States
Prior art keywords
contacts
switch
bridge member
contact
slider
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
US697885A
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English (en)
Inventor
Horst Priebs
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.)
Anker Werke AG
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Anker Werke AG
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Filing date
Publication date
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Publication of US3578929A publication Critical patent/US3578929A/en
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    • 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
    • H01H1/20—Bridging contacts
    • 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
    • H01H13/12—Movable parts; Contacts mounted thereon
    • H01H13/20—Driving mechanisms

Definitions

  • a switch slider of an electric switch is linked with an actuating member and is reciprocably movable by the actuating member.
  • a spring applies a force to the switch slider to position an electrically conductive bridge member pivotally mounted on the switch slider in electrical bridging contact with a pair of spaced electrical contacts positioned in fixed relation to each other and to maintain good electrical contact between the bridge member and the contacts by relative motion of the bridge member and the contacts.
  • My invention relates to an electric switch. More particularly, my invention relates to an electric switch for calculating and accounting machines and the like, which switch opens and closes selected circuits at specific instants.
  • Switches of this type generally comprise a movable contact member which coacts with a fixed contact member.
  • the movable contact member is spring-biased. When the springbiased contact members are moved into and out of electrical contact with the fixed contact members, vibrations often occur whichlead to undesirable and troublesome bouncing of the electrical contacts. This causes the release of several, rather than one, current pulses, so that faulty electrical connections result, especially in controlling bistable multivibrators.
  • Ger man Pat. No. 1,097,726 discloses a contact key mechanism which is provided with a locking device. Upon completion of an operation by an electromagnet, the locking device unlatches a latched switch lever which closes a spring contact and pivots the switch lever into an inactive position. In the inactive position of the switch lever, the spring contacts are reopened. This locking device is clumsy in operation and, due to the properties of the leaf spring contacts, the contact pressure of the switch is limited so that contact adjustments of the switch point is unattainable and is not stable.
  • German Pat. application DPB 847,222 discloses a device for avoiding vibrations and bouncing of electrical contacts in a switching arrangement.
  • the pressure exerted by a contact member which is movable by one member to engage the electrical contacts, is increased by another member. This is accomplished by interpolating a control member immediately after the engagement of the contacts.
  • This apparatus is also clumsy and is not suitable for key operations, due to the high power required. Furthermore, it does not ensure reliable contact engagement for longer periods since there is no relative movement during the engagement of the contacts. Thus, even a slight layer of dust or oxide may produce insufficient engagement of the contacts, especially when the current is weak.
  • An object of the present invention is to avoid the disadvantages of known switches and to provide a switch which is operated by small key pressure and small movement pressure and which ensures high electrical contact engagement and freedom from bouncing of the electrical contacts.
  • the electrical switch of the present invention provides selfcleaning electrical contacts.
  • Another object of the present invention is to provide an electrical switch which functions with efficiency, effectiveness and reliability to provide good electrical contact at predetermined instant without vibration or bouncing of'such contacts.
  • a switch slider has a bridge member pivotally mounted thereon.
  • the bridge member is moved into electrical bridging contact with a pair of spaced electrical contacts positioned in fixed relation to each other in transverse planes by a spring which applies a force to the switch slider.
  • Good electrical contact between the bridge member and the contacts is maintained by relative motion of the bridge member and the contacts, which keeps the contacts clean.
  • the switch slider is supported by an abutment on a supporting frame which abutment is adjustable to adjust the point of contact between the electrical contacts.
  • the electrical contacts are positioned so that in each position of the switch slider there are, within the pivotal range, contact arms of the bridge member, which is fork-shaped.
  • FIG. 1 is a side view, partly in section, of an abutment of the electrical switch of the present invention, such'switch being normally closed and operated by a key;
  • FIG. 2 is a side view, partly in section, of the switch of FIG. 1 operated by a lever;
  • FIG. 3 is a side view, partly in section, of an electrical switch ofa modification of the switch of FIGS. 1 and 2, which is normally open.
  • the switch comprises an actuating lever l of angular configuration which is rotatably mounted on a pivot pin or pivot axle 2.
  • the actuating lever I is mounted between the legs of a box-shaped base frame 3 and is laterally guided in a guide comb 4.
  • An insulating plate 5 is affixed to the base frame and carries two electrical contacts 6 and 7 which are in planes perpendicular to each other. The contacts 6 and 7 are spaced in fixed relation to each other.
  • An adjustable angular abutment 8 is affixed to one leg 3a of the frame 3.
  • One end of a switch slider 9 rests on the adjustable abutment 8.
  • the switch slider 9 is of electrically insulating material and is positioned on the actuating lever l by a pivot pin 10.
  • the switch slider 9 is mechanically coupled to the other leg 31; of the frame 3 by a pull spring 11.
  • the switch slider 9 is reciprocably movable by the actuating lever 1.
  • An electrically conductive bridge member 12 is pivotally mounted on the switch slider 9 by a pivot pin 13.
  • the bridge member 12 is fork-shaped and has a pair of spaced contact arms 12a and-12b.
  • the bridge member 12 is pivotable to a limited extent and is of such configuration and is so positioned on the switch slider 9 that the electrical contact areas of the electrical contacts 6 and 7 are positioned within the pivotal range of the arms 12a and 12b of said bridge member when said bridge member is in and out of electrical bridging contact with said contacts, in each position of the switch slider.
  • a depressible key 14 is provided for operating the actuating lever 1. This is accomplished by a slide cam 15, in the shape of inclined plane positioned at the shank of the key 14 which cam coacts with a roller 16 affixed to the corresponding end of the actuating lever 1.
  • the key 14 is usually coupled to a locking device of suitable type (not shown in the FIGS.), which arrests said key in its depressed position until a predetermined machine operation is completed.
  • the actuating lever l is operated by an entrainer pin 17 which is affixed to a two-arm lever 18.
  • the lever 18 is pivotally movable about a center pivot by a pull rod 19.
  • the switch slider 9 has an oblong slot 21 formed therethrough and is mounted upon the pivot pin 10 of the actuating lever l in a pivotable and displaceable manner.
  • a tension spring 22 is affixed at one end to the pivot pin 10 of the actuating lever 1 and at the other end to a pin 23 of the switch slider 9.
  • the tension spring 22 ensures that the switch slider 9 in its rest position abuts against the pivot pin 10.
  • the compression spring 20 is affixed at one end to the switch slide slider 9 and at its other end to the leg 3b of the frame 3 and functions to urge said switch slider to its rest position shown in FIG. 3.
  • the switch slider 9 includes a rod-shaped extending member 9a in order to prevent the compression spring 20 from becoming misaligned.
  • the switch of FIGS. 1 and 2 is normally in closed condition wherein the electrical contacts are in engagement with each other.
  • the switch slider 9, as shown in FIG. 1 is in its left-end position, due to the force exerted by the spring 11.
  • the contact arms 12a and 12b of the bridge member 12 are in engagement with the contact areas of the electrical contacts 6 and 7.
  • the force exerted by the pull spring I l causes the con tact arm 12a of the bridge member I2 to abut against the electrical contact 7.
  • the contact arm 12b of said bridge member engages the electrical contact 6 with the same pressure as that of the engagement of the contact arm 12a with the electrical contact 7. This is the case when the arms 12a and 12b of the bridge member 12 are of equal length.
  • the force exerted by the spring 11 is equally distributed to the electrical contacts 6 and 7 by the pivotal bridge member 12 and therefore en sures a constantly high contact engagement pressure.
  • the switch slider 9 Upon the elevation of the key I4 to its rest position or upon the rotation of the lever 18 to its rest position, the force exerted by the spring ll again moves the switch slider 9 to the left, the spring 11 exerts a force which moves the switch slider 9 into the switching position wherein the electrical contacts 6 and 7 are again in electrical contact via the bridge member 12.
  • the switching time or instant at which contact engagement occurs may be varied in order to adjust the switching instant for a plurality of switches; for example, the variation of the switching instant may be accomplished by the adjustment or bending of the abutment 8.
  • the bridge member 12 is relatively moved due to the circular arc-type movement of the switch slider 9 by the pivot pin 10, which pivot pin is movable in the circular arc.
  • the relative movement of the bridge member 12 produces a friction movement when the contact arms 12a and 12b thereof abut against the contact areas of the electrical contacts 7 and 6.
  • Such friction movement is produced between the contact arms of the bridge member and the corresponding electrical contacts and ensures the cleanliness and therefore good electrical contact characteristics of the contact areas.
  • An electric switch for calculating and accounting machines and the like comprising an actuating member; a switch slider linked with said actuating member and reciprocably movable by said actuating member; a pair of spaced electrical contacts rigidly positioned in planes that are transverse to each other; said contacts having surfaces disposed at an angle of greater than therebetween; an electrically conductive bridge member pivotally mounted on said switch slider; and spring means affixed and applying a force to said switch slider for positioning said bridge member in electrical bridging contact with said contacts and for cleaning said contacts by relative motion of said bridge member and said contacts.
  • An electric switch for calculating and accounting machines and the like, comprising an actuating member; a switch slider linked with said actuating member and reciprocably movable by said actuating member; a pair of spaced electrical contacts positioned in planes that are transverse to each other; and electrically conductive bridge member pivotally mounted on said switch slider; spring means affixed and applying a force to said switch slider for positioning said bridge member in electrical bridging contact with said contacts and for cleaning said contacts by relative motion of said bridge member and said contacts; a frame for supporting said electric switch and an adjustable abutment affixed to said frame, said switch slider being movably supported by said abutment.
  • An electric switch for calculating and accounting machines and the like, comprising an actuating member; a switch slider linked with said actuating member and reciprocably movable by said actuating member; a pair of spaced electrical contacts positioned in planes that are transverse to each other; an electrically conductive bridge member pivotally mounted on said switch slider; spring means affixed and applying a force to said switch slider for positioning said bridge member in electrical bridging contact with said contacts and for cleaning said contacts by relative motion of said bridge member and said contacts; a frame for supporting said electric switch and an abutment affixed to said frame and adjustable transversely to the direction of movement of said switch slider, said switch slider being movably supported by said abutment in a manner whereby the extent of movement of said switch slider required to bring said bridge member into and out of electrical bridging contact with said electrical contacts depends upon the adjusted position of said abutment.
  • said bridge member is of fork shape having a pair of spaced arms each adapted to contact a corresponding one of said electrical contacts, said bridge member being pivotable to a detennined extent about a pivot point on said switch slider, said contacts being within the pivotal range of the arms of said bridge member when said bridge member is in and out of electrical bridging contact with said contacts.

Landscapes

  • Push-Button Switches (AREA)
  • Rotary Switch, Piano Key Switch, And Lever Switch (AREA)
US697885A 1967-01-17 1968-01-15 Slider switch with adjustable abutment on frame, and stationary contact faces with an angle greater than 180{20 {0 therebetween bridged by a fork shaped bridging contact Expired - Lifetime US3578929A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DEA0054637 1967-01-17

Publications (1)

Publication Number Publication Date
US3578929A true US3578929A (en) 1971-05-18

Family

ID=6939575

Family Applications (1)

Application Number Title Priority Date Filing Date
US697885A Expired - Lifetime US3578929A (en) 1967-01-17 1968-01-15 Slider switch with adjustable abutment on frame, and stationary contact faces with an angle greater than 180{20 {0 therebetween bridged by a fork shaped bridging contact

Country Status (5)

Country Link
US (1) US3578929A (fr)
CH (1) CH473464A (fr)
DE (1) DE1615564B1 (fr)
FR (1) FR1551560A (fr)
SE (1) SE325155B (fr)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US20090170408A1 (en) * 2007-12-31 2009-07-02 Lee C C Integrated Circuit Package Contact Cleaning

Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE876561C (de) * 1951-10-19 1953-05-15 Hermann Kurt Weihe Hydraulisch betaetigter Stopplichtschalter
US2662142A (en) * 1950-11-03 1953-12-08 Nelson Jessie Ann Coaxial-line switch
US3057554A (en) * 1958-12-22 1962-10-09 Hobart Mfg Co Scales
US3170054A (en) * 1961-06-09 1965-02-16 Allen Bradley Co Electromagnetic switch
US3239627A (en) * 1962-12-24 1966-03-08 Cutler Hammer Inc Hermetically sealed electromagnetic contactor having wear adjustment
US3260824A (en) * 1963-07-29 1966-07-12 Arrow Hart & Hegeman Electric Low energy non-arcing electric relay construction

Family Cites Families (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US1853964A (en) * 1930-03-15 1932-04-12 Gen Electric Electric switch
DE686706C (de) * 1937-10-26 1940-01-15 Siemens Schuckertwerke Akt Ges Druckknopfschalter
DE1737071U (de) * 1955-04-09 1957-01-03 Stotz Kontakt Gmbh Elektrischer schalter, insbesondere selbstschalter mit einem an einer laengsverschiebbaren schaltstange federnd angeordneten schaltstueck.
BE558739A (fr) * 1956-06-28
DE1085588B (de) * 1956-12-17 1960-07-21 Siemens Ag Tastschalter, insbesondere Endschalter

Patent Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2662142A (en) * 1950-11-03 1953-12-08 Nelson Jessie Ann Coaxial-line switch
DE876561C (de) * 1951-10-19 1953-05-15 Hermann Kurt Weihe Hydraulisch betaetigter Stopplichtschalter
US3057554A (en) * 1958-12-22 1962-10-09 Hobart Mfg Co Scales
US3170054A (en) * 1961-06-09 1965-02-16 Allen Bradley Co Electromagnetic switch
US3239627A (en) * 1962-12-24 1966-03-08 Cutler Hammer Inc Hermetically sealed electromagnetic contactor having wear adjustment
US3260824A (en) * 1963-07-29 1966-07-12 Arrow Hart & Hegeman Electric Low energy non-arcing electric relay construction

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US20090170408A1 (en) * 2007-12-31 2009-07-02 Lee C C Integrated Circuit Package Contact Cleaning

Also Published As

Publication number Publication date
SE325155B (fr) 1970-06-22
CH473464A (de) 1969-05-31
DE1615564B1 (de) 1971-03-04
FR1551560A (fr) 1968-12-27

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