US3598942A - Contact device for electric timers or similar apparatus - Google Patents

Contact device for electric timers or similar apparatus Download PDF

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Publication number
US3598942A
US3598942A US879790A US3598942DA US3598942A US 3598942 A US3598942 A US 3598942A US 879790 A US879790 A US 879790A US 3598942D A US3598942D A US 3598942DA US 3598942 A US3598942 A US 3598942A
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United States
Prior art keywords
spring means
contact
movement
operating
spring
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Expired - Lifetime
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US879790A
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English (en)
Inventor
Rolf Karl Wilhelm Laven
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Auralight AB
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Lumalampan AB
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Publication date
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    • G—PHYSICS
    • G04—HOROLOGY
    • G04C—ELECTROMECHANICAL CLOCKS OR WATCHES
    • G04C23/00—Clocks with attached or built-in means operating any device at preselected times or after preselected time-intervals
    • G04C23/02—Constructional details
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01R—ELECTRICALLY-CONDUCTIVE CONNECTIONS; STRUCTURAL ASSOCIATIONS OF A PLURALITY OF MUTUALLY-INSULATED ELECTRICAL CONNECTING ELEMENTS; COUPLING DEVICES; CURRENT COLLECTORS
    • H01R31/00—Coupling parts supported only by co-operation with counterpart
    • H01R31/06—Intermediate parts for linking two coupling parts, e.g. adapter
    • H01R31/065—Intermediate parts for linking two coupling parts, e.g. adapter with built-in electric apparatus

Definitions

  • the contact tripping or actuating member of the timer is operatively connected to the springs of these contact arms so that the spring forces of each spring acting on the timing mechanism tend to cancel each other out and thus do not interfere with timer movement.
  • the spring urgency exerted in a direction on the switch contacts is arranged to obtain circuit-c0mpleting positions of the contact arms under sufficient pressure which assures firm surface contact of the electrical contacts.
  • the present invention relates generally to switch-operating timers, and more particularly to an improved electrical contact of the type adapted to be operated in timed response to the operation ofa timing mechanism.
  • a spring-biased electrical contact of the type designed to be operated by a timing mechanism at the end of a selected time duration is well known.
  • the spring which biases the contact in the closed position thereof of necessity is anchored or connected to the same part to which time-responsive movement of the timing mechanism is imparted. That is, the pan of the timer which progressively moves in timed relation to the timing operation of the timing mechanism is invariably the part to which at least one end of the spring is attached which biases and operates the electrical contact.
  • FIG. I is a perspective view of a time-responsive electrical contact device according to the present invention illustrating the conventional timing mechanism thereof.
  • FIGS. 2 and 3 are both front elevational views illustrating the internal structural features of the device, in which noteworthy internal structure as well as the mode of operation of said structure are illustrated by which the device achieves electrical contact opening and closing movements in timed response to the operation of the timing mechanism.
  • Timer I will be understood to be of the type which includes a conventional timing mechanism including dial faces 4, 5 and 6 which are adapted to be set relative to each other to provide a visual indication of a selected time interval until an electrical circuit is either opened or closed, as desired.
  • a conventional timing mechanism including dial faces 4, 5 and 6 which are adapted to be set relative to each other to provide a visual indication of a selected time interval until an electrical circuit is either opened or closed, as desired.
  • the timing mechanism of the timer 1 such mechanism is electrically operated by current supplied via an electrical plug 2 and, as is characteristic of timing mechanisms, it also includes at least one operating part which is slowly powered in rotation at a selected timed rate. It is this time-responsive output movement of the timing mechanism which is utilized to, in turn, cause the. actuation of an electrical switch to either open .or close an electrical circuitand thus enable the timer I to achieve its commercial function.
  • the controlelecuical circuit which is either opened or closed is'electrically connected to the timer I via the electrical conductor 3.
  • the part of the timer 1 which progressively moves in timed relation to the timing operation of the timing mechanism is invariably the part to which at least one end of the spring is attached which biases and operates the electrical contact.
  • a very light bias spring for the electrical contact. This, however, is not desirable since the light biasing spring, while not interfering with movement ofthe internal parts of the timer, also does not provide a sufficient urgency or holding force holding the contacts of the electrical switch in firm surface contact with each other. As a result, the electrical circuit completed through the contact is adversely effected.
  • spring urgency of a comparatively large extent is utilized to maintain circuitcompleting contact of the contact switch or arm, and yet this spring urgency is prevented from interfering with the timing movement of the internal parts of the timer I.
  • the manner in which this is achieved will be readily understood from the description which follows of the electrical circuit contact means which, in essence, is the inventive noteworthy aspect of the timer 1.
  • included as part of the timer 1 are not just one, but rather two spring-biased electrical contacts which are adapted to have simultaneous operation to, in turn, achieve the circuit opening and closing function for the timer 1 in timed response to the timing mechanism of the timer.
  • Each of these contacts includes a contact arm 8 and 9,'respectively, which simultaneously moves between circuit-completing positions, as illustrated in FIG. 2, and circuit-opening positions, as illustrated in FIG. 3. Tracing the electrical circuits through contact arm 8, this half of the circuit is completed through an electrical conductor 17 which then branches to the left, as viewed in FIG. 2, through a switch bracket I0, the contact arm 8, the electrical contacts I3 and 14 in surface contact against each other, the switch bracket I5, and finally the output electrical conductor I7. The other half of the electrical circuit is completed through the electrical conductor I7 which branches to the right, also as viewed in FIG.
  • the contact arms 8 and 9 are adapted to be snapped from their circuit-closing positions through circuitopening movement into circuit-opening positions in which each bears against contact supports or seats 18 and I9 and the contacts 13 and I4, and I3, I4 respectively are in out-ofcontact, clearance positions with respect to each other.
  • slide member 7 Cooperating with the contacts 8 and 9 is a slide member 7, which member will be understood to be the member to which time-responsive movement is imparted in accordance with the operation ofthe timing mechanism.
  • Slide 7 is arranged to be moved along a feed path in response to timed operation of the timing mechanism.
  • FIGS. 2 and'3' illustrate this feed movement in which the slide 7 is shown in FIG. 2 in a depressed starting position and in FIG. 3 in a raised terminating position, these ositions being understood, to respectively illustrate the positions of movement of the slide 7 at thestart and termination ofa timed interval. That is, in the FIG. 2 starting position ofthe slide 7, the contact arms 8 and 9 are in a circuit-completing position and at the end of the time interval during which the slide is raised into its FIG. 3 position, this raising of the slide results in the snapping movement of the contact arm 8 and 9 into their circuit-opening positions as il lustrated in FIG. 3.
  • Each of the cooperating contacts 8 and 9 may be of the well-known type in which opening and closing movements are achieved not only under spring bias but, as already indicated, in a characteristic snapping movement.
  • these contacts are identically constructed and, using contact arm 8 as an example, the same includes a two-piece spring 20 hinged, as at 25, and connected, at one end, to the free end of the contact arm 8 and, at its other end, to a lever 22 fulcrumcd, as at 24, at one end to the spring bracket 10 and at its opposite end to the slide 7.
  • contact arm 9 also includes a two-piece spring 21 connected at one end to the free end of the contact arm and at its opposite end to a lever 23 also iulcrumed, as at 24, at one end to the spring bracket II and connected at its opposite end to the slide 7.
  • the spring biased contact arms 8 and 9 have spaced connections 27 and 28 to a common member, namely the slide 7, which also is the part to which progressive timing movement is imparted during operation of the timing mechanism of the timer.
  • a common member namely the slide 7
  • the significance of the common slide member 7 serving as an anchoring point for the springs and 21 of the contacts 8 and 9 are twofold.
  • Movement of the slide 7 can readily be seen from comparison of FIGS. 2 and 3, to cause snapping movement of the contact arms 8 and 9 between their circuit opening and closing positions.
  • contact arm 8 as an example, as the slide 7 progresses from its depressed position as illustrated in FIG. 2 to its raised position of FIG. 3, there is counterclockwise pivotal movement of the lever 22 about the pivot point 24. In response to this pivotal movement, there is corresponding movement of the spring point 25 past the contact arm pivot point 26 with the result that the buildup of spring pressure or urgency is relieved by a clockwise pivotal movement of the contact arm 8 about its pivot 26.
  • the contact arm 8 is in its circuit-completing position as illustrated in FIG. 2 or in its circuit breaking or opening position as illustrated in FIG.
  • the common connecting member 7 serves as an anchoring point for contacts 8 and 9.
  • spring 20 bias contact arm 8 into its circuit-completing position not only does spring 20 bias contact arm 8 into its circuit-completing position but this spring also has a tendency to urge lever 22 in clockwise direction about the fulcrum 24. This, in turn, is transmitted at the connection 27 to the slide 7 and places the slide under a downward biasing force.
  • the spring 21 of the cooperating contact 9 is similarly applying a clockwise biasing force to the lever 23 and this force is transmitted via the connection 28 to the slide 7.
  • a first movable switching lever (8) one of the contacts (14) of said pair being fixedly mounted, and the other contact (13) of said pair being mounted at one end of said switching lever (8), the other end of said switching lever being pivoted for switching movement of the contact end toward and away from the fixedly mounted contact;
  • a second switching lever having one end pivotally mounted; first pivotally mounted operating lever (22) and a first spring means (20) interconnecting said first operating and said first switching levers for overcenter movement of said first spring means upon pivoting of said first operating lever;
  • said spring-loaded operating levers engaging said coupling member in a direction such that the spring forces transferred by said operating levers apply to said joint coupling member (7) relative forces which are in opposition to each other, to assist movement of said coupling member in a given direction by one of the spring means under opposition by the other spring means until the overcenter position of both said spring means is reached and, after such position, to provide opposition by said one spring means and assistance for further movement of said coupling member by the other spring means.
  • Device according to claim 1 including a second set of contacts (13', 14'), one of the contacts being fixedly mounted and the other contact being mounted on the other end of said second switching lever (9).
  • the coupling member is a slider (7) located between said operating levers (22,23), said operating levers being pivoted about axes (24) extending in a plane transverse to the sliding movement of the slider and located laterally therefrom at opposite sides of the slider to rock said operating levers, upon sliding movement of said slider, about their axes (24) and in opposite directions;

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  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Mechanisms For Operating Contacts (AREA)
  • Slide Switches (AREA)
  • Measurement Of Predetermined Time Intervals (AREA)
  • Driving Mechanisms And Operating Circuits Of Arc-Extinguishing High-Tension Switches (AREA)
US879790A 1968-11-27 1969-11-25 Contact device for electric timers or similar apparatus Expired - Lifetime US3598942A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
SE16191/68A SE335764B (enrdf_load_stackoverflow) 1968-11-27 1968-11-27

Publications (1)

Publication Number Publication Date
US3598942A true US3598942A (en) 1971-08-10

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ID=20301855

Family Applications (1)

Application Number Title Priority Date Filing Date
US879790A Expired - Lifetime US3598942A (en) 1968-11-27 1969-11-25 Contact device for electric timers or similar apparatus

Country Status (9)

Country Link
US (1) US3598942A (enrdf_load_stackoverflow)
JP (1) JPS521108B1 (enrdf_load_stackoverflow)
DE (1) DE1959504C3 (enrdf_load_stackoverflow)
DK (1) DK134088B (enrdf_load_stackoverflow)
FI (1) FI50819C (enrdf_load_stackoverflow)
FR (1) FR2024375A1 (enrdf_load_stackoverflow)
GB (1) GB1276529A (enrdf_load_stackoverflow)
NO (1) NO123355B (enrdf_load_stackoverflow)
SE (1) SE335764B (enrdf_load_stackoverflow)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US10784235B2 (en) 2018-01-30 2020-09-22 Cree Fayetteville, Inc. Silicon carbide power module

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE2611154C3 (de) * 1976-03-17 1982-11-18 Theben-Werke Zeitautomatik GmbH, 7452 Haigerloch Steckdosen-Schaltuhr
DE2908597A1 (de) * 1979-03-05 1980-09-25 Westdeutsche Elektrogeraete Elektrische steckvorrichtung mit steckerkolben, steckdose, sowie elektrischem geraet fuer die betaetigung einer stell- und/oder schalt- und/oder anzeigeeinrichtung

Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2889419A (en) * 1957-10-29 1959-06-02 Ram Domestic Products Company Electrical timing device and improved switch means therefor
US3281553A (en) * 1963-11-04 1966-10-25 Leach Corp Snap switch with dual blades urged toward each other

Patent Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2889419A (en) * 1957-10-29 1959-06-02 Ram Domestic Products Company Electrical timing device and improved switch means therefor
US3281553A (en) * 1963-11-04 1966-10-25 Leach Corp Snap switch with dual blades urged toward each other

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US10784235B2 (en) 2018-01-30 2020-09-22 Cree Fayetteville, Inc. Silicon carbide power module
USD909310S1 (en) * 2018-01-30 2021-02-02 Cree, Fayetteville, Inc. Power module

Also Published As

Publication number Publication date
GB1276529A (en) 1972-06-01
FI50819B (enrdf_load_stackoverflow) 1976-03-31
DE1959504A1 (de) 1970-07-09
SE335764B (enrdf_load_stackoverflow) 1971-06-07
JPS521108B1 (enrdf_load_stackoverflow) 1977-01-12
FI50819C (fi) 1976-07-12
DK134088B (da) 1976-09-06
NO123355B (enrdf_load_stackoverflow) 1971-11-01
FR2024375A1 (enrdf_load_stackoverflow) 1970-08-28
DK134088C (enrdf_load_stackoverflow) 1977-02-07
DE1959504B2 (de) 1973-09-20
DE1959504C3 (de) 1974-04-11

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