US3495203A - Switch - Google Patents

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Publication number
US3495203A
US3495203A US764495A US3495203DA US3495203A US 3495203 A US3495203 A US 3495203A US 764495 A US764495 A US 764495A US 3495203D A US3495203D A US 3495203DA US 3495203 A US3495203 A US 3495203A
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United States
Prior art keywords
switch
ratchet lever
abutment
actuating element
bimetallic
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
US764495A
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English (en)
Inventor
Josef Neubauer
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.)
Diehl Verwaltungs Stiftung
Original Assignee
Diehl GmbH and Co
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 Diehl GmbH and Co filed Critical Diehl GmbH and Co
Application granted granted Critical
Publication of US3495203A publication Critical patent/US3495203A/en
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    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
    • H01H43/00—Time or time-programme switches providing a choice of time-intervals for executing one or more switching actions and automatically terminating their operations after the programme is completed
    • H01H43/30—Time or time-programme switches providing a choice of time-intervals for executing one or more switching actions and automatically terminating their operations after the programme is completed with timing of actuation of contacts due to thermal action
    • H01H43/301—Time or time-programme switches providing a choice of time-intervals for executing one or more switching actions and automatically terminating their operations after the programme is completed with timing of actuation of contacts due to thermal action based on the expansion or contraction of a material
    • H01H43/302—Time or time-programme switches providing a choice of time-intervals for executing one or more switching actions and automatically terminating their operations after the programme is completed with timing of actuation of contacts due to thermal action based on the expansion or contraction of a material of solid bodies
    • H01H43/304—Time or time-programme switches providing a choice of time-intervals for executing one or more switching actions and automatically terminating their operations after the programme is completed with timing of actuation of contacts due to thermal action based on the expansion or contraction of a material of solid bodies of two bodies expanding or contracting in a different manner, e.g. bimetallic elements
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
    • H01H43/00—Time or time-programme switches providing a choice of time-intervals for executing one or more switching actions and automatically terminating their operations after the programme is completed
    • H01H43/30—Time or time-programme switches providing a choice of time-intervals for executing one or more switching actions and automatically terminating their operations after the programme is completed with timing of actuation of contacts due to thermal action
    • H01H43/301—Time or time-programme switches providing a choice of time-intervals for executing one or more switching actions and automatically terminating their operations after the programme is completed with timing of actuation of contacts due to thermal action based on the expansion or contraction of a material
    • H01H43/302—Time or time-programme switches providing a choice of time-intervals for executing one or more switching actions and automatically terminating their operations after the programme is completed with timing of actuation of contacts due to thermal action based on the expansion or contraction of a material of solid bodies
    • H01H43/304—Time or time-programme switches providing a choice of time-intervals for executing one or more switching actions and automatically terminating their operations after the programme is completed with timing of actuation of contacts due to thermal action based on the expansion or contraction of a material of solid bodies of two bodies expanding or contracting in a different manner, e.g. bimetallic elements
    • H01H43/305—Time or time-programme switches providing a choice of time-intervals for executing one or more switching actions and automatically terminating their operations after the programme is completed with timing of actuation of contacts due to thermal action based on the expansion or contraction of a material of solid bodies of two bodies expanding or contracting in a different manner, e.g. bimetallic elements actuating the contacts by commanding a mechanical device, e.g. thermal motor

Definitions

  • the present invention resides in a push-button type timing switch which has an actuating element that can be depressed against the action of a spring and which, in depressed position, maintains contacts in closed position.
  • the actuating element has associated with it a timing mechanism which is controlled by an electrically heated bimetallic element.
  • the timing mechanism itself controls the heater for the bimetallic element and alternatively switches the heater on and olf, the arrangement being such that the actuating element is allowed to return to its starting position in a stepwise manner.
  • the present invention relates to a push-button type timing switch in which an actuating element is mounted for sliding movement in a frame, there being a ratchet lever coacting with the actuating element.
  • This ratchet lever has a number of steps.
  • the frame iS provided with xed abutment means which are engaged by the side of one step of the ratchet lever and by the front of the subsequent step, with spring means being provided to urge the steps toward the xed abutment means.
  • Movable abutment means are arranged next to the fixed abutment means and are moved by bimetallic moving means in such a way that the movable abutment means move into and out of alignment with the Xed abutment means.
  • the bimetallic moving means After cessation of heating, the bimetallic moving means return the movable abutment means back into alignment with the xed abutment means, thus unblocking the previously engaged step and allowing the ratchet lever to move under the inuence of the spring means so that the side of the subsequent step and the front of the next subsequent step of the ratchet lever come into engagement with the fixed abutment. In this way, the ratchet lever, and with it the actuating element, are returned to a rest position, under the inuence of the spring means, in a half-step by half-step manner at a rate which is determined by the rate at which the bimetallic moving means are heated and allowed to cool.
  • the number of heating and cooling cycles, and hence the run-off time, depends on how far the actuating element is depressed.
  • the ratchet lever is lifted off the abutment means when the actuating element is completely depressed, so that the switch can be returned to its olf position before the run-off time has elapsed.
  • FIGURE l is a plan view of one embodiment of a push-button type timing switch according to the present invention, the switch being shown in its off or starting position, i.e., the parts are shown in the positions which they occupy before the switch is actuated.
  • FIGURE 2 is a sectional plan view of the switch of FIGURE 1 taken on line II-II of FIGURE 5, the parts now being shown in a first on position.
  • FIGURE 3 is a fragmentary sectional plan view similar to FIGURE 2 except that the parts are shown in the positions they occupy when the switch has been actuated in such a way as to provide maximum run-off time.
  • FIGURE 4 is a fragmentary sectional plan view similar to FIGURES 2 and 3 except that the parts are shown in the positions they occupy at the instant in which the timing mechanism is released manually for the purpose of resetting the switch.
  • FIGURE 5 is sectional side elevation taken on line V-V of FIGURE 1.
  • FIGURE 6 is a fragmentary sectional side elevation of a locking mechanism forming part of the switch shown in FIGURE 1, FIGURE 6 being taken on line VI-VI of FIGURE 4.
  • FIGURE 7 is a plan view of another embodiment of a push-button type timing switch ⁇ according to the present invention, the parts being shown in the positions they occupy when the switch has been actuated so as to provide the maximum run-off time.
  • FIGURE 8 is a sectional side elevation taken on line VIII-VIII of FIGURE 7.
  • FIGURE 9 is a sectional bottom view showing the underside of the switch taken on line IX-IX of FIGURE 8, the parts being ⁇ shown in the positions they occupy when the switch has been actuated so as to provide maximum run-off time.
  • FIGURES 1 to 6 show a push-button type electric timing switch incorporating a U-shaped frame 1 into which is inserted a bottom plate 2.
  • An actuating element 3 which carries, at the left-hand end, as viewed in the drawings, a push-button 4, is mounted on the frame i1 and bottom plate 2 so as to be slidable with respect thereto against the force of a tension spring 5.
  • One end of the spring 5 engages a slide 12, to be described below, while the other end is hooked into an eye 6 which is part of a stepped ratchet lever 7, the latter being pivotally mounted on the actuating element 3 by means of a screw 8.
  • the eye 6 is laterally oiset with respect to the pivot axis afforded by the screw 8 such that the spring 5 which acts on the element 3 simultaneously applies a continuous force to the ratchet lever 7 which tends to rotate the lever 7 in counter-clockwise direction, as viewed in the drawing.
  • the lever 7 has, at its free end, laterally directed steps 9.
  • the ratchet lever 7 In rest position, the ratchet lever 7 lies against a xed abutment 10 of frame 1, immediately next to which there is arranged an abutment tongue 11 of the above-mentioned slide 12, the same being mounted for movement in a direction transverse to the direction in which the actuating element 3 moves.
  • the bimetallic strip 13 carries a heater winding 16, so that when this heater is energized by means of an electric current, the strip 13 is deflected, the arrangement of the components of the bimetallic strip 13 being such that when the heater winding 16 is energized, the left-hand end of strip 13 is moved upwardly, again as viewed in the drawing, and thus in a direction away from the bimetallic strip 14.
  • the two bimetallic strips 113, i14 thus act in opposition to each other and thus eliminate the eiect of ambient temperature uctuations.
  • the ratchet lever 7 has, at its end face near the pivot screw -8, an oblique camming edge 17 which, when the ypush-button 4 is completely depressedsee FIGURE 4-strikes against the bracket 15 so that the ratchet lever 7 is pivoted in clockwise direction against the action of the return and pivot spring 5.
  • the steps 9 are raised oit the abutment A10.
  • the ratchet lever 7 carries a leaf spring 18 which is secured to the ratchet lever and which, as is best shown in FIGURE 6, has a projection 19 that extends through a cut-out 20 of the ratchet lever 7 into a recess 21 of the actuating element 3, Iwhen the ratchet lever 7 is pivoted beyond its normal position as the camming edge 17 strikes the bracket 15.
  • the leaf spring 18 additionally has an upwardly bent tongue 22 which, when the actuating element slides back into its rest position, comes into engagement with a xed abutment tongue 23 that is part of the frame 1 and which lifts the leaf spring 18 off the ratchet lever 7, assuming the latter to have been moved into position wherein the projection 19 extends into the recess 21 of the actuating element 3.
  • the actuating element 3 has firm-ly connected to it a plate 24 which carries bridging contacts 25, the latter coacting with stationary contact blades or terminals 26, 27, 28, 29, that are mounted on a base plate 30 made of insulating material.
  • the base plate 30 is connected by means of pins or the like with the frame 1 of the switch.
  • the terminals 26, 27, 28, 29, themselves are molded or riveted to the base plate 30 ⁇ and have knife-edge ends which project through an insulating strip 31.
  • the base plate 30 is, furthermore, provided with a resilient contact slide 32 which coacts with transversely extending Contact strips 33, 34, 35, on the plate 24.
  • This contact slide 32 coacts with the contact strips 33, 34, 35 to control the heating current flowing through the heater winding 16 of the working bimetallic strip 13. Accordingly, contact 32 is yconnected to one end of the heater winding 16, the terminal 28 being connected to the other end of the heater winding.
  • the contact strips 33, 34, 35 are all connected to that bridging contact 25 which, when the switch is turned on, i.e., when the push-button is depressed, is in electrically conductive contact with the terminal 26.
  • the switch shown in FIGURES 7, 8 and 9 is essentially similar in construction, except that the ratchet lever 7 is at right angles to the actuating element 3 and is pivotally mounted thereon.
  • the function of the oblique camming edge 17 is taken over lby an abutment 36 which, when the actuating element 3 is fully depressed, pivots the ratchet Vlever 7' in counter-clockwise direction.
  • FIGURES 7 to 9 incorporates a conventional U-shaped double bimetallic element, the same including a cross piece 37 which is pivotally mounted on the frame and two bimetallic strips 318, 39 Welded to this cross piece, the components of these strips being so arranged that when the elements bow as the result of temperature variations, they do so in the same direction.
  • the compensating effect is obtained not by equal and opposite forces, but by equal deections of the bimetallic strips 38, 39, from their respective rest positions, as is conventional, for example, in electric ranges.
  • the bimetallic strip 38 carries a heater winding 40
  • a leaf spring 45 is provided for the purpose of holding the ratchet lever 7' after it has been reset by depressing the push-button, this leaf spring 45 being adjacent the ratchet lever 7 and having a bent-over tongue 46 which detents into the stepped portion of the ratchet lever 7 when the same has been pivoted in a counter-clockwise direction.
  • This ratchet lever 7 is released by means of a ramp -47 with which the frame 1 is provided and onto which runs a free, upwardly bent end 48 of the leaf spring 45.
  • the above-described elements can be kinematically inverted, in that instead of pivotallyl mounting the ratchet lever 7, 7 on the actuating element 3 and providing the stationary abutment 10, 42, which is lixed on the frame, the ratchet lever 7, 7' can be pivoted on a fixed point on the frame and the abutment can be arranged on the actuating element 3 or be actuated by it.
  • the transverse contact strip 33 is now in contact with the contact slide 32, so that the heater winding 16 which is now connected to a supply voltage (not shown) via the terminals 28, 29, has current flowing through it.
  • the bimetallic strip 13 is heated until the abutment tongue 11 of the ratchet lever 7 is raised Sulliciently to allow the step edge 9d tov slide away over the abutment 10 and to come to lie against the movable abutment 11 which, now being out of alignment with the Iixed abutment 10, in effect takes over the function of this abutment 10.
  • the ratchet lever 7 has thus now moved back toward its starting position, under the inuence of the spring 5, by what may be considered a halfstep.
  • the contact-carrying plate 24 will also have moved back a half-step, as a result of which the conta-ct slide 32 will now come to engage the undersurface of the plate 24 at a point between the transverse contact strip 33 and the next contact strip 34, the spacing between these two strips and all of the transverse contact strips being such that the contact slide 32 is out of contact with any transverse contact strip whenever the plate is in such a half-step position.
  • the heater 16 is turned off and the bimetallic strip 13 is allowed to cool.
  • the parts are returned into the starting or ofi position of the switch, under the inhuence of the spring 5, in a half-step by half-step manner at a rate which is determined by the rate at which the bimetallic strip 13 is heated and allowed to cool.
  • the actuating element 3 can, as is apparent from FIGURE 4, return to its starting position under the inlluence of the spring 5.
  • the steps 9 of the ratchet lever 7 pass over the abutment 10 and the abutment tongue 11.
  • the tongue 22 (FIGURE 6) of the leaf spring 18 slides over the abutment tongue 23 (FIGURES 2 and 5) of the frame 1, thereby raising the leaf spring 18 until its projection 19 is no longer in the recess 21 which, in turn, unlocks the ratchet lever 7.
  • the ratchet lever 7 will then, under the influence of the spring 5, once again come to lie against the abutment 10.
  • the bridging contact 25 is withdrawn from between the contact blades 26, 27.
  • FIGURES 7 to 9 operates in a similar manner, except that the ratchet lever 7' is at right angles to the actuating element 3 and that the rest position of the abutment tongue 41 is adjustable with respect to the steps of the ratchet lever 7 by means of the set screw 43, 44.
  • the above description of the present invention is susceptible to various modiiications, changes and adaptations.
  • the number of steps 9 can be varied to meet the requirements of a particular switch, in that if it is desired to give the switch the capability of providing more than three different run-off periods, an appropriately higher number of steps and transverse contact strips on plate 24 will be provided.
  • a push-button type timing switch comprising, in combination:
  • said locking means comprise a leaf spring carried by said ratchet lever, said leaf spring having a projection which enters into a recess of said actuating element when said ratchet lever has been moved by the interaction between said camming surface and said abutment, thereby to hold said ratchet lever in such last-mentioned position, said leaf spring further having a releasing portion coacting with a further xed abutment on said frame when said actuating element is in said starting position which further fixed abutment raises said projection of said leaf spring out of said recess, thereby to allow said ratchet lever to return to its normal starting position with respect to said actuating element.
  • said bimetallic moving means comprise a tirst bimetallicvstrip one end of which carries said movable abutmentmeans, a cross piece pivotally mounted onsaid frame and connected to the other end of said rst bimetallic strip, a second bimetallic strip having' one end connected to said cross piece, the other end of said second bimetallic strip being lixed, and wherein said means (h) comprise a heater winding for heating said second bimetallic strip.
  • said means (h) comprise a heaterv winding'for heating one of said bimetalic strips.
  • -A switch as defined in claim 2, further comprising a contact-carrying plate connected to said actuating element for movement therewith, movable contact means carried by said plate, and stationary contact means carried by said frame and coacting with said movable contact means.
  • said means (h) comprise a heater, a plurality of spaced-apart contact strips arranged on said contact-carrying plate and extending transversely to the direction of movement thereof and a contact slide carried by said frame and coacting with said contact strips, said contact strips and contact slide together constituting a switch and being connected in series-circuit with said heater for turning the same on and off, one of said contact strips, upon initial actuation of said actuating element, being in electrical contact with said contact slide, thereby to turn on said heater and to cause the rst of said half-step movements of said ratchet lever and hence of said actuating element and plate, the spacing between consecutive contact strips being such that said contact slide is out of contact with any one of them in such half-step position of said plate,
US764495A 1967-10-19 1968-10-02 Switch Expired - Lifetime US3495203A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DE1615988 1967-10-19

Publications (1)

Publication Number Publication Date
US3495203A true US3495203A (en) 1970-02-10

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ID=5682132

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Application Number Title Priority Date Filing Date
US764495A Expired - Lifetime US3495203A (en) 1967-10-19 1968-10-02 Switch

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US (1) US3495203A (de)
DE (1) DE1615988B1 (de)
FR (1) FR1599001A (de)
GB (1) GB1232260A (de)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3839691A (en) * 1972-01-14 1974-10-01 Telemecanique Electrique Setting and triggering device for thermal relay
US5455549A (en) * 1994-02-25 1995-10-03 Siemens Energy & Automation, Inc. Multi-function button for electronic overload relay

Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2696541A (en) * 1953-02-19 1954-12-07 Bulldog Electric Products Co Circuit breaker
FR1144041A (fr) * 1952-09-10 1957-10-08 Minuterie à bilames

Family Cites Families (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE514837C (de) * 1930-12-18 Junghans Akt Ges Geb Zeitschalter mit abwechselnd sich erwaermendem und abkuehlendem Bimetallstreifen
DE1908042A1 (de) * 1969-02-18 1970-09-03 Kieninger & Obergfell Elektrische Schaltuhr zum Begrenzen von Verfahrensschritten

Patent Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR1144041A (fr) * 1952-09-10 1957-10-08 Minuterie à bilames
US2696541A (en) * 1953-02-19 1954-12-07 Bulldog Electric Products Co Circuit breaker

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3839691A (en) * 1972-01-14 1974-10-01 Telemecanique Electrique Setting and triggering device for thermal relay
US5455549A (en) * 1994-02-25 1995-10-03 Siemens Energy & Automation, Inc. Multi-function button for electronic overload relay

Also Published As

Publication number Publication date
GB1232260A (de) 1971-05-19
DE1615988B1 (de) 1971-05-19
FR1599001A (de) 1970-07-15

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