US2540895A - Visible indicator for electric apparatus - Google Patents

Visible indicator for electric apparatus Download PDF

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Publication number
US2540895A
US2540895A US35859A US3585948A US2540895A US 2540895 A US2540895 A US 2540895A US 35859 A US35859 A US 35859A US 3585948 A US3585948 A US 3585948A US 2540895 A US2540895 A US 2540895A
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US
United States
Prior art keywords
switch
indicator
switches
plate
cams
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
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US35859A
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English (en)
Inventor
Lelong Jean
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Individual
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Individual
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Publication date
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Publication of US2540895A publication Critical patent/US2540895A/en
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Classifications

    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F24—HEATING; RANGES; VENTILATING
    • F24C—DOMESTIC STOVES OR RANGES ; DETAILS OF DOMESTIC STOVES OR RANGES, OF GENERAL APPLICATION
    • F24C7/00—Stoves or ranges heated by electric energy
    • F24C7/08—Arrangement or mounting of control or safety devices
    • F24C7/082—Arrangement or mounting of control or safety devices on ranges, e.g. control panels, illumination
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
    • H01H9/00—Details of switching devices, not covered by groups H01H1/00 - H01H7/00
    • H01H9/16—Indicators for switching condition, e.g. "on" or "off"
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
    • H01H9/00—Details of switching devices, not covered by groups H01H1/00 - H01H7/00
    • H01H9/16—Indicators for switching condition, e.g. "on" or "off"
    • H01H9/161—Indicators for switching condition, e.g. "on" or "off" comprising light emitting elements

Definitions

  • the present invention relates to indicating devices for any kind of electrical apparatus, but in particular devices serving to indicate the energization of at least one of the circuits of electrical heating apparatus, such as cookers and furnaces, comprising a, number of switches or interrupters.
  • warning indicator The practical purpose of a warning indicator is to avoid the condition Where one or more of the circuits remains needlessly turned on due to carelessness; and to achieve this object the employment of one indicator only is sufficient.
  • the switches may be provided with auxiliary contacts connected in parallel, which however necessitates the use of special switches which are expensive. If use is made of the main supply current traversing the supply conductors of the apparatus, one may employ the following alternatives:
  • the present invention seeks to remedy these various drawbacks.
  • the present invention has for its object to provide a control system for a single indicator in electrical apparatus comprising a plurality of circuits each of which is controlled by a separate switch having at least two positions.
  • the system may be arranged so that a mechanical connection maintains the indicator in a given position, e. g. in the off position only if all the switches are also in a given position, e. g. in
  • Figure 1 is a diagrammatic perspective view of a system according to the present invention comprising -controlling cams and a signalling lamp.
  • Figure 2 shows the various different positions assumed by a cam in the system according to Figure 1.
  • Figure 3 is a partial view of a modified system analogous to that shown in Figure 1, but employing a movable mechanical signalling vane, the electrical heating apparatus in question being assumed to be in the non-energized condition.
  • Figure 4 shows the position of the system according to Figure 3 in the case where the electrical heating apparatus is energized.
  • Figures 5 and 6 show the two different positions occupied by the vane corresponding respectively to Figures 3 and 4.
  • the electrical apparatus the functioning of which is to be observed comprises four rotary switches H arranged on parallel shafts 82; each switch is supposed to provide for three on positions and one off position.
  • a rotatable shaft hi Below the cams and in a plane slightly to the rear of and parallel to that of the cams, is disposed a rotatable shaft hi, the movement of which is limited by a restoring spring, not shown in the drawings, to which shaft is secured an element 15 in the form of a plate cooperating with the various cams.
  • the shaft [4 is also the shaft of the controlling element for the signalling indicator, which in this case is a switch I6 in circuit with a lamp I? connected to the mains; the shaft M will close the switch !6 when the plate It is in its lower position and will open the switch when the plate is in its upper position.
  • the controlling element for the signalling indicator which in this case is a switch I6 in circuit with a lamp I? connected to the mains; the shaft M will close the switch !6 when the plate It is in its lower position and will open the switch when the plate is in its upper position.
  • the switch l6 itself may be provided with a restoring spring intended to urge the plate [5 into its upper position when all the switches II are in the off position.
  • the shaft l4 may act indirectly on the switch 16 which may be of any type, for example a mercury bulb. If the shafts l2 of the switches are not all parallel, the system is nevertheless applicable, thus in the case of four switches with shafts in parallel pairs, a switch I6 is controlled by each group of two parallel shafts and the two switches will be mounted connected in parallel in the signalling circuit. The lamp will only be extinguished if both switches 16 are open.
  • profile of the cam may itself be modified while giving a similar result.
  • Figures 3 to 6 show a simplification of the system according to Figure 1, employing a movable indicator vane 18 located behind an opening 20; the indicator target may be colored, for example white on its lower surface and provided with a red zone at l9, and is actuated by the shaft [4 which carries the plate 15.
  • the system and the Warning device are in this case purely mechanical.
  • a plurality of rotary switches each having an actuating spindle and having an off position and at least one on position, said switches being mounted with said spindles coplanar and parallel, a plurality of similar cams fixedly mounted coplanarly respectively on said spindles, and common indicator control means comprising a shaft mounted rotatably transversely of said spindles and adjacent said cams, and further comprising a rigid cam following plate fixedly mounted radially on said shaft and non-yieldingly engageable with all said cams, and also comprising a control member carried on said shaft and adapted to actuate an external control for controlling a signal, each of said cams having a single minimum radius oil dwell corresponding to the off position of its switch, and said oiT dwells occupying the same angular position when all said switches are turned off and when engaged by said plate causing said indicator control means including said plate to assume a determined on position, each of said cams having over the rest of its circumference
  • control member including an electrical switch and being adapted to control an electrical circuit.
  • control member including a visual signal actuating device arranged to directly mechanically actuate a mechanically displaceable external signal operator.

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  • Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Control Of Resistance Heating (AREA)
US35859A 1947-07-11 1948-06-29 Visible indicator for electric apparatus Expired - Lifetime US2540895A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
FR2540895X 1947-07-11

Publications (1)

Publication Number Publication Date
US2540895A true US2540895A (en) 1951-02-06

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ID=9686297

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Application Number Title Priority Date Filing Date
US35859A Expired - Lifetime US2540895A (en) 1947-07-11 1948-06-29 Visible indicator for electric apparatus

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US (1) US2540895A (en))
NL (1) NL68279C (en))

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP2169698A1 (de) * 2008-09-30 2010-03-31 BSH Bosch und Siemens Hausgeräte GmbH Tastschalteranordnung für ein Haushaltsgerät, insbesondere Dunstabzugsvorrichtung

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2322162A (en) * 1940-01-04 1943-06-15 Gen Electric Control arrangement for signal devices
US2350078A (en) * 1939-09-18 1944-05-30 Gen Motors Corp Domestic appliance
US2430125A (en) * 1944-10-16 1947-11-04 Jerome L Kipnis Device for indicating the synchronization of two revolving or rotating bodies

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2350078A (en) * 1939-09-18 1944-05-30 Gen Motors Corp Domestic appliance
US2322162A (en) * 1940-01-04 1943-06-15 Gen Electric Control arrangement for signal devices
US2430125A (en) * 1944-10-16 1947-11-04 Jerome L Kipnis Device for indicating the synchronization of two revolving or rotating bodies

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP2169698A1 (de) * 2008-09-30 2010-03-31 BSH Bosch und Siemens Hausgeräte GmbH Tastschalteranordnung für ein Haushaltsgerät, insbesondere Dunstabzugsvorrichtung

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NL68279C (en))

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