US3264444A - Actuating means for microswitches - Google Patents

Actuating means for microswitches Download PDF

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Publication number
US3264444A
US3264444A US340085A US34008564A US3264444A US 3264444 A US3264444 A US 3264444A US 340085 A US340085 A US 340085A US 34008564 A US34008564 A US 34008564A US 3264444 A US3264444 A US 3264444A
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United States
Prior art keywords
plunger
lever
bracket
axis
longitudinal axis
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Expired - Lifetime
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US340085A
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English (en)
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Krauss Otto
Bahmann Franz
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Individual
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    • 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
    • H01H13/14—Operating parts, e.g. push-button
    • H01H13/18—Operating parts, e.g. push-button adapted for actuation at a limit or other predetermined position in the path of a body, the relative movement of switch and body being primarily for a purpose other than the actuation of the switch, e.g. door switch, limit switch, floor-levelling switch of a lift
    • H01H13/186—Operating parts, e.g. push-button adapted for actuation at a limit or other predetermined position in the path of a body, the relative movement of switch and body being primarily for a purpose other than the actuation of the switch, e.g. door switch, limit switch, floor-levelling switch of a lift wherein the pushbutton is rectilinearly actuated by a lever pivoting on the housing of the switch

Definitions

  • FIG. #1 O. KRAUSS ET L ACTUATING MEANS FOR MICROSWITCHES Filed Jan. 24, 1964 FIG. #1
  • the present invention relates to microswitches.
  • the present invention relates to that type of microswitch where a plunger projects from the interior of the switch housing to the exterior thereof and where a lever engages the plunger to displace the latter longitudinally for actuating the switch.
  • this lever may be actuated by any machine element and is supported by a suitable bearing or bracket which is carried by the housing of the switch.
  • levers are subjected to a considerable amount of wear, they are generally mounted so that a worn lever can easily be removed and replaced by a new lever.
  • the invention includes, in a microswitch, a housing means and a plunger means extending from the interior to the exterior of the housing means and having at the exterior thereof an elongated portion which terminates in an outer end of the plunger means.
  • the plunger means has a longitudinal'axis and is supported by the housing means for movement along this longitudinal axis between a pair of end positions where the outer end of the plunger means intersects the longitudinal axis at a pair of predetermined points, re spectively.
  • An elongated lever means engages the outer end of the plunger means to displace the latter along its longitudinal axis
  • a support means is carried by the housing means and supports the lever means for turning movement about a turning axis which is located in a plane normal to the longitudinal axis of the plunger means and Patented August 2, 1966 intersecting this longitudinal axis midway between the above-mentioned predetermined points of intersection of this axis and the outer end of the plunger means when the latter is in its end positions, respectively.
  • FIG. 1A is a side elevation of one possible embodiment of a microswitch according to the present invention.
  • FIG. 1B is an end elevation of the structure of FIG. 1A as seen from the left of FIG. 1A;
  • FIG. 2A is a side elevation and FIG. 2B is an end elevation, from the left of FIG. 2A, of a second embodiment of a microswitch according to the present invention
  • FIG. 3A is a side elevation and FIG. 3B is an end elevation, from the left of FIG. 3A, of a third embodiment of a microswitch according to the present invention
  • FIG. 4A is a side elevation and FIG. 4B is an end elevation, as seen from the left of FIG. 4A, of a fourth embodiment of a microswitch according to the present invention.
  • FIG. 5 is a schematic illustration of the principle of operation of the present invention.
  • the microswitch illustrated therein includes a housing means 1 carrying a plunger means 9 which projects from the interior to the exterior of the housing means and which has, as shown in FIG. 1A, an elongated portion at the exterior of the housing means 1 terminating in an outer left end, as viewed in FIG. 1A.
  • the plunger 9 has a horizontal longitudinal axis, as viewed in FIG. 1A, and this plunger 9 is supported by the housing means 1 for movement horizontally, as viewed in FIG. 1A, along its longitudinal axis between a pair of end positions where the outer end of the plunger 9 intersects its longitudinal axis at a pair of predetermined points, as will be apparent from the description below in connection with FIG. 5.
  • An elongated lever means 4 engages the outer end of the plunger 9 to displace the latter along its longitudinal axis so as to actuate the switch in a manner well known in the art.
  • a support means 2 is carried by the housing means 1 and supports the lever means 4 for turning movement about a turning axis A which is located in a plane normal to the longitudinal axis of the plunger 9 and intersecting this latter axis midway between the points of intersection between the outer end of the plunger 9 and this longitudinal axis when the plunger 9 is in its end positions, and this feature, as explained in greater detail below in connection with FIG. 5, results in a minimum amount of wear between the lever 4 and the plunger 9.
  • the support means 2 takes the form of a bracket fixed to the housing means 1 and having distant therefrom an elongated projection 3 at the side of the lever 4 opposite from the housing means 1.
  • This projection 3 acts as a limiting means to limit the turning of the lever 4 about the turning axis A away from the plunger 9 in a clockwise direction, as viewed in FIG. 1A.
  • the bracket 2 is formed with a cutout, in the form of a slot, through which a portion of the lever 4 extends, and the lever 4 has a pair of shoulders 6 (FIG.
  • the portion of the lever 4 which is at the side ofthe bracket 2 which is directed toward the plunger 9 is wider than the length of the slot of the bracket 2 so that the shoulders 6 cannot move through this slot, and the width of the portion 3 7 of the lever 4 is only slightly less than the length of the slot in the bracket 2.
  • the lever 4 has a cranked portion 8 which enables the axis A to be situated 1 identical with the housing means 1 and the plunger .9:
  • the bracket 12 is the same as the bracket 2 except that it does not have any projection '3.
  • the lever 14 extends in the same way as the lever 4 through a slot of the bracket 12 and has struck from its portion 17 a lug 15 which engages the surface of the bracket 12 which is directed away from the plunger 19 so as to maintain the lever 14 in the illustrated position with the shoulders of the lever. engaging the surface of the bracket 12 which is directed toward the plunger 19.
  • the support means 12 provides for -j the lever means 14 a turning axis A which has with 'respect to the plunger 19 the same relationship as the turning axis A of the lever 4 with respect to the plunger 9. 1 It will be noted that the lever 14 has a cranked portion 18 identical with the cranked portion 8.
  • FIGS. 2A and 2B The principal distinction of the embodiment of FIGS. 2A and 2B'over that of FIGS. 1A and 1B is that-instead of providing the support means with a projection .3, in the embodiment'of FIGS. 2A and 2B the lever 14. has a lug 16 struck from a portion thereof at the side of'the bracket plunger -19-to serve as a limiting means for limiting the extent to which the lever 14 can turn away from the plunger 19. It will be noted that the lug 16 is located '12 which is directed toward the plunger 19 and engaging the surface of the bracket 12 which is directed toward the at the side of the lever 14 which is directed away from the housing means 11.
  • portion- 27 of the lever 24 is formed with a cutout 25' having asubstantially H-shaped configuration so that the a cutout has a tongue projecting into the cutout at the side for the bracket 22 directed away from the plunger 29, and at this side of the bracket is located a spring 26; receiving this tongue, situated in the cutoutv 25 ,'"and bearing. against thesurface of the bracket 22 which is directed away from the plunger 29 as well as against the upper edge of the cutout 25, as viewed, in FIGS. 3A and 313, so that the spring 26 urges the. shoulders 30, which correspond to the shoulders 6 of FIG.i1B,againstthe surface of the bracket 22 which'is directed toward the plunger 29.
  • the spring 26 formsa means urging the lever 24 in the direction of the arrow b of FIG. 3B to maintain the shoulders 30 inengagement with the bracket 22.
  • the portion 27: of the lever 24 has a pairiof spaced tongues which project'into' the spring 261, and in order to remove the lever 24 it is:only necessary to displace it downwardly, as viewed in FIG. 313, until the lower tongue of FIG. 3B is displacedbeyond the lower end of the spring 26. after which the latter can be displaced at its; lower end out of the cutout 25f andremoved from the upper tongue of FIG.
  • FIGS. 4A 'and'4B includes-a housing means .31 and a plunger 39 identical with the. above housing means and plungers of the other embodiments.
  • the lever 34 andishookedonto the bracket 32 and 'the lever34 tourgethe latter upwardly and in a clockwise direction about theaxis A,- as viewed in.
  • FIG. 4A
  • brackets, levers, plunger-s and springs may be. made. ofany suitable metals, for example.
  • a microswitch in combination, housing means; plunger means having an elongated portion projecting from the interior of said housing means and terminating in an outer end, having a longitudinal axis, and supported by said housing means for longitudinal movement along said axis between a pair of end positions where said outer end of said plunger means intersects said longitudinal axis at a pair of predetermined points, respectively; lever means engaging said outer end of said plunger means for displacing the latter along said axis; and support means carried by said housing means and supporting said lever means for turning movement about an axis located in a plane normal to said longitudinal axis of said plunger means and intersecting said longitudinal axis midway between said points.
  • a microswitch in combination, housing means; plunger means having an elongated portion projecting from the interior of said housing means and terminating in an outer end, having a longitudinal axis, and supported by said housing means for longitudinal movement along said axis between a pair of end positions where said outer end of said plunger means intersects said longitudinal axis at a pair of predetermined points, respectively; lever means engaging said outer end of said plunger means for displacing the latter along said axis; support means carried by said housing means and supporting said lever means for turning movement about an axis located in a plane normal to said longitudinal axis of said plunger means and intersecting said longitudinal axis midway between said points; and limiting means limiting said lever means to turning movement relative to said support means.
  • housing means in combination, housing means; plunger means extending from the interior to the exterior of said housing means and having at the exterior of said housing means an elongated portion terminating in an outer free end of said plunger means, said plunger means having a longitudinal axis and being supported by said housing for movement along said longitudinal axis between a pair of end positions where said outer end of said plunger means intersects said longitudinal axis at a pair of predetermined points; elongated lever means engaging said outer end of said plunger means for displacing the latter along said axis; and support means supporting said lever means for turning movement about a turning axis which is located in a plane normal to said longitudinal axis and intersecting the latter midway between said points, said support means including a bracket fixed to said housing means and formed with an opening through which said lever means extends and said lever means having a lug projecting therefrom and engaging said bracket to limit movement of said lever means in at least one direction relative to said bracket transversely of said turning axis.
  • a plunger extending from the interior to the exterior of said housing means, having at the exterior of said housing means an elongated portion terminating in an outer end of said plunger, having a longitudinal axis and being supported by said housing means for movement along said axis between a pair of end positions where said outer end intersects said axis at a pair of predetermined points; an elongated lever engaging said outer end of said plunger for displacing the latter along said axis; a bracket carried by said housing means and formed with a cutout through which said lever extends, said lever having a shoulder engaging said bracket at a surface of the latter directed toward said plunger to limit movement of said lever in a direction from said plunger toward said bracket, and said bracket supporting said lever for turning movement about an axis located in a plane normal to said longitudinal axis and intersecting the latter midway between said points; and means operatively connected to said lever for maintaining said shoulder thereof in engagement with said bracket.
  • said lastrnentioned means including a lug projecting from said lever and engaging a surface of said bracket which is directed away from said plunger.
  • a plunger extending from the interior to the exterior of said housing means, having at the interior of said housing means an elongated portion terminating in an outer end of said plunger, having a longitudinal axis and being supported by said housing means for movement along said axis between a pair of end positions where said outer end intersects said axis at a pair of predetermined points; an elongated lever engaging said outer end of said plunger for displacing the latter along said axis; a bracket carried by said housing means and formed with a cutout through which said lever extends, said lever having a shoulder engaging said bracket at a surface of the latter directed toward said plunger to limit movement of said lever in a direction from said plunger toward said bracket, and said bracket supporting said lever for turning movement about an axis located in a plane normal to said longitudinal axis and intersecting the latter midway between said points; and spring means operatively connected to said lever for urging the latter from said plunger toward said bracket so as to maintain
  • housing means in combination, housing means; plunger means extending from the interior to the exterior of said housing means and having at the exterior of said housing means an elongated portion terminating in an outer end of said plunger means, said plunger means having a longitudinal axis and being supported by said housing means for movement along said longitudinal axis between a pair of positions where said outer end of said plunger means intersects said longitudinal axis at a pair of predetermined points; elongated lever means engaging said outer end of said plunger means for displacing the latter along said longitudinal axis; support means carried by said housing means and supporting said lever means for turning movement about a turning :axis located in a plane normal to said longitudinal axis and intersecting the latter midway between said points; and limiting means limiting the extent to which said lever means can turn away from said plunger means.
  • said limiting means including a portion of said support mean-s located in the path of turning of said lever means away from said plunger means.
  • said limiting means including a lug projecting from said lever means Q and engaging said support means to limit the extent to which said lever means can turn away from said plunger means.
  • a microswitch in combination, housing means; a plunger extending from the interior to the exterior of said housing means and having an elongated portion at the exterior of said housing means terminating in an outer end of said plunger, said plunger having a longitudinal axis and being supported by said housing means for movement along said axis between a pair of end positions Where said end of said plungerintersects said axis at a pair of predetermined points; an elongated lever engaging said outer end of said plunger for displacing the latter along said axis; a bracket fixed to said housing means and formed with a cutout through which said lever extends, said lever having a shoulder engaging said bracket at a surface thereof which is directed toward,
  • said plunger to limittmovement of said lever from said plunger toward said bracket and said bracket supporting said lever [for turning movement about a turning .axis located in a plane normal to said longitudinal axis and intersecting the latter midway between said points, said lever having a portion projecting beyond said bracket at the side thereof opposite from-said plunger and formed with an opening extending at least up to said bracket, said lever having a tongue projecting into said opening and directed toward said bracket at the side thereof which is directed away from said plunger; and a coil spring in said opening surrounding said tongue and engaging said lever and bracket to urge said shoulder of said lever against said bracket.
  • a plunger extending from the interior to the exterior of said housing means and having an outer elongated portion at the exterior of said housing means terminating in an outer end of said plunger, said plunger having a :longitudinal axis and being supported by said housing means for movement along said longitudinal axis between a pair .ing movement about a turning axis located in a plane normal to said longitudinal axis and intersecting the latter midway between said points, and said lever having at a portion which projects beyond said bracket at the side.
  • said bracket having at the side of said lever which is directed away from said housing means a projection limiting the turn-. ingot said lever away from said plunger,
  • a plunger extending from the interior to the exterior of said housing means and having at: the exterior of said housing means an elongated portion terminating in an outer-end of said: plunger, said plunger having a longitudinal-axis and being. supported by said housing means for movement along said longitudinal axis between a pair of end positions where said outer end.
  • a microswitch in combination, support means; plunger means having an outer end, having a longitudinal axis, and supportedby saidsupp'ort meansifor longitudia nal movement along said axis between a pair of end positions where said outer end of said plunger means intersects said longitudinal axis .at a pair of predetermined points, respectively;.lever-means engaging said outer end of said plunger means for'displacing the latter along said 'axis; and bearing means supporting said lever means for turning movement about an axis located in -a plane normal to said longitudinal axis of said plunger means and.

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US340085A 1963-01-29 1964-01-24 Actuating means for microswitches Expired - Lifetime US3264444A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DEG36925A DE1247438B (de) 1963-01-29 1963-01-29 Mikroschalter

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US3264444A true US3264444A (en) 1966-08-02

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US340085A Expired - Lifetime US3264444A (en) 1963-01-29 1964-01-24 Actuating means for microswitches

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US (1) US3264444A (fr)
DE (1) DE1247438B (fr)
FR (1) FR1378705A (fr)
GB (1) GB1011434A (fr)

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3484572A (en) * 1968-07-30 1969-12-16 American Mach & Foundry Lever for switch actuation and hinge therefor
US3720802A (en) * 1971-06-08 1973-03-13 Schaltbau Gmbh Switch actuation with lever action
US3809837A (en) * 1971-09-30 1974-05-07 Matsushita Electric Works Ltd Microswitch with readily removable leaf spring actuating means
US3968337A (en) * 1974-07-26 1976-07-06 Cole Donald G Door-actuated alarm switch
US4306132A (en) * 1979-04-27 1981-12-15 Unimax Switch Limited Electrical switches

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE4002371A1 (de) * 1990-01-27 1991-08-01 Deere & Co Gehaeuse fuer eine mikroschalterbaueinheit

Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2828372A (en) * 1953-04-20 1958-03-25 A F Bulgin & Company Ltd Electric switch operating means
US2898428A (en) * 1957-12-30 1959-08-04 Burgess Products Co Ltd Actuators for electrical switches

Family Cites Families (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE599846C (de) * 1929-11-14 1934-07-10 Erich Kieback Dr Ing Elektrischer Kontaktregler, insbesondere Temperaturregler
US2468673A (en) * 1944-09-25 1949-04-26 First Ind Corp Switch operating mechanism
US2547765A (en) * 1948-11-05 1951-04-03 W L Maxson Corp Switch actuator
US2817725A (en) * 1956-02-03 1957-12-24 Gilfillan Bros Inc Overtravel mechanism for sensitive switches
AT195505B (de) * 1956-04-21 1958-02-10 Philips Nv Vorrichtung zum Betätigen eines Druckknopfschalters

Patent Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2828372A (en) * 1953-04-20 1958-03-25 A F Bulgin & Company Ltd Electric switch operating means
US2898428A (en) * 1957-12-30 1959-08-04 Burgess Products Co Ltd Actuators for electrical switches

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3484572A (en) * 1968-07-30 1969-12-16 American Mach & Foundry Lever for switch actuation and hinge therefor
US3720802A (en) * 1971-06-08 1973-03-13 Schaltbau Gmbh Switch actuation with lever action
US3809837A (en) * 1971-09-30 1974-05-07 Matsushita Electric Works Ltd Microswitch with readily removable leaf spring actuating means
US3968337A (en) * 1974-07-26 1976-07-06 Cole Donald G Door-actuated alarm switch
US4306132A (en) * 1979-04-27 1981-12-15 Unimax Switch Limited Electrical switches

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Publication number Publication date
FR1378705A (fr) 1964-11-13
GB1011434A (en) 1965-12-01
DE1247438B (de) 1967-08-17

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