US1820361A - Electric switch - Google Patents

Electric switch Download PDF

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Publication number
US1820361A
US1820361A US32742828A US1820361A US 1820361 A US1820361 A US 1820361A US 32742828 A US32742828 A US 32742828A US 1820361 A US1820361 A US 1820361A
Authority
US
United States
Prior art keywords
switch
dynamo
contacts
armature
contact
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
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English (en)
Inventor
Menzel Friedrich
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.)
Robert Bosch AG
Robert Bosch GmbH
Original Assignee
Robert Bosch GmbH
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 Robert Bosch GmbH filed Critical Robert Bosch GmbH
Application granted granted Critical
Publication of US1820361A publication Critical patent/US1820361A/en
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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Classifications

    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02J—ELECTRIC POWER NETWORKS; CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
    • H02J7/00—Circuit arrangements for charging or discharging batteries or for supplying loads from batteries
    • H02J7/14—Circuit arrangements for charging or discharging batteries or for supplying loads from batteries for charging batteries from dynamo-electric generators driven at varying speed, e.g. on vehicle
    • H02J7/16—Regulation of the charging current or voltage by variation of field
    • H02J7/22—Regulation of the charging current or voltage by variation of field due to variation of make-to-break ratio of intermittently-operating contacts, e.g. using Tirrill regulator
    • H02J7/225—Regulation of the charging current or voltage by variation of field due to variation of make-to-break ratio of intermittently-operating contacts, e.g. using Tirrill regulator characterised by the mechanical construction
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60L—PROPULSION OF ELECTRICALLY-PROPELLED VEHICLES; SUPPLYING ELECTRIC POWER FOR AUXILIARY EQUIPMENT OF ELECTRICALLY-PROPELLED VEHICLES; ELECTRODYNAMIC BRAKE SYSTEMS FOR VEHICLES IN GENERAL; MAGNETIC SUSPENSION OR LEVITATION FOR VEHICLES; MONITORING OPERATING VARIABLES OF ELECTRICALLY-PROPELLED VEHICLES; ELECTRIC SAFETY DEVICES FOR ELECTRICALLY-PROPELLED VEHICLES
    • B60L3/00—Electric devices on electrically-propelled vehicles for safety purposes; Monitoring operating variables, e.g. speed, deceleration or energy consumption
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
    • H01H71/00—Details of the protective switches or relays covered by groups H01H73/00 - H01H83/00
    • H01H71/10—Operating or release mechanisms
    • H01H71/12—Automatic release mechanisms with or without manual release
    • H01H71/14—Electrothermal mechanisms
    • H01H71/16—Electrothermal mechanisms with bimetal element

Definitions

  • Figure 1 shows the regulator switch partly an section together with a wiring diagram
  • Figure 2 is a section on an enlarged scale of a portion of the regulator switch when the switch contact spring is heated.
  • a compound wound relay in the, form of D an iron core 2, about which are'wound a our- SWITCH 327,428, and in Germany December 17, 1927.
  • the member 10 by reason of the resiliency of the spring 8, bears against an arm'll of the armature 5, the arm being bent at right angles to said armature.
  • a stop 14 is provided on the arm 11 of the armature and is located opposite a stop 16 of insulating material mounted on a contact spring. 15.
  • the contact spring carries at its end a contact 17, which is adapted to cooperate with a pairof stationary contacts 18 and 19.
  • the contacts 17, 18 and.19 serve as the regulator contacts.
  • An excitation winding 21 is connected with the positive terminal of a dynamo armature 20 in series with-a series resistance 22, the free end of which is earthed' A lead 23 is taken off between the excitation winding 21 and the resistance 22, and led to the contact spring 15 mounted on the insulating plate 13, thereby short-circuiting the resistance 22 when the contacts 17, 18 are closed,
  • each of the coils 8 and 4 is connccted with the positive terminal of the armature 20.
  • the other end of the coil 3 is connected with the bi-metal spring 8, whilst the other end of the coil 4 is earthed.
  • Leads are taken from the switch contact 12 to the positive terminals of the battery 24 and .the lamps 25, the negative terminals of which and also the negative terminal of the armature 20 are all earthed.
  • the regulator switch normally works as follows Upon the dynamo voltage reaching a predetermined value, the armature 5 is attracted by the iron core 2 by the excitation of the voltage coil 4, to such an extent that the contact 9 of the bi-metal spring 8 bears against the stationary contact 12, thereby closing the switch and connecting up the current consuming devices 24 or 25 with the dynamo.
  • the switch contacts 9, 12 are thereby closed again as the armature 5 is attracted b the iron core 2 according to the dynamo vo tage.
  • the rapid successive opening and closing of the switch commences, owing to the short-circuit, with the sole difference that the bi-metal spring now heats up more rapidly than on the first occasion, since it has not completely cooled on closing of the switch.
  • the heat produced by small opening sparks is therefore sufiicient to cause the bi-metal spring to bend again.
  • the operation of the switch proceeds in this manner without its contacts being damaged by the relatively small sparks on opening.
  • the bi-metal spring 8 is silvered in order to prevent oxide formed on heating and has a low electrical conductivity, improving the electrical connection between the bi-metal spring and the contact member 9.
  • the oxidation of the silver has no adverse efiect, as silver oxide is a good electrical conductor.
  • the bi-metal spring consists of strips of iron and brass welded together, the brass strip being located on the side facing the contact 9. The period during which the switch is open can be shortened by selecting a suitable composition of the bimetal spring.
  • the sequence of switching operations is thereby rendered more rapid, and the striking of the armature 5 against the end of the core 2, or against the stop 7 can be used as an audible indication to warn the driver of the short-circuit.
  • the bi-metal spring can also be used to prolong the closing of the switch and thus to avoid continuous sparks.
  • What I claim is 1.
  • a battery charging system including a dynamo, dynamo voltage regulating means, a battery and current consuming devices, the combination of an automatic safety switch comprising a compound wound relay, an armature actuated by said relay, a main circuit from said dynamo to said current consuming devices and thermo-sensitive contact means situated in said main circuit, mechanically operated by said armature to open and close said main circuit and operated in response to heat generated by sparks in its actuation to actuate the switch contacts independently of the mechanical operation of said armature.
  • thermo-sensitive contact means in said-main circuit, a compound wound relay common to both said dynamo voltage regulating means and to said thermo-sensitive contact means and an armature actuated by said relay for operating said dynamo voltage regulating means and said thermo-sensitive contact means, said thermosensitive contact means being arranged to open the main circuit independently of said armature in response to heat generated by the sparking of the contacts.
  • a battery charging system including a dynamo, dynamo voltage regulating means, a battery, current consuming devices and a main circuit from said dynamo to said current consuming devices, the combination of and an armature actuated by said relay adapted to displace said thermo-sensitive switch to make and breaksaid main c1rcu1t,sa1dthermo sensitive switch being arranged to break said main circuit independently of the armature in response to variations in temperature caused by sparking of said switch.
  • a battery charging system including a dynamo, a regulator adapted to maintain constant the dynamo voltage, a battery, current consuming devices and a main circuit from said dynamo to said current consuming devices, the combination of an automatic safety switch comprising acompound wound relay, an armature actuated by said relay, a pair of contacts in said main-circuit and a thermo-sensitive switch element carrying one of said contacts and affected by the heat generated by sparks set up on displacement of said switch on opening said contacts.
  • a battery charging system including a dynamo, a regulator adapted to maintain constant the dynamo voltage. a battery, current consuming devices and a main circuit from said dynamoto said current consuming devices, the combination of an automatic safety switch comprising a compound wound relay, an armature actuated by said relay, a pair of contacts in said main circuit and a resilient bi-metal switch carrying one of said contacts and affected by the heat generated by sparks set up on displacement of said switch to open said contacts.
  • an automatic safety switch comprising a thermo-sensitive bi-metal spring switch situated in said main circuit, a compound wound relay common to said dynamo voltage regulating means and to said switch, an armature actuated by said relay and a pair of contacts in said main circuit, one of which is carried by said switch, said switch being arranged to move the contact carried by it away from the other of said pair of contacts in response to an increase of temperature in said switch caused by sparking between said pair of contacts.
  • a battery charging system including a dynamo, dynamo voltage regulating means, a. battery, current consuming devices and a main circuit from said dynamo to said current consuming devices, the combination of an automatic safety switch comprising a coinpound wound relay, an armature actuated by said relay, a pair of contacts in said main circuit for operation by said armature and a thermo-sensitive bi-metal spring switch, a
  • thermo-sensitive switch means situated in said main circuit and supporied at one end on said frame, said thermo-sensitive switch means being arranged to be mechanically operated by said armature, and to open said main circuit independently of said armature upon an increase in temperature caused by sparking of said switch.
  • thermo-sensitive switch comprising an angle iron frame, a compound wound relay supported on said frame, an armature actuated by said relay and resiliently mounted on said frame, a contact arm for said dynamo voltage regulating means, insulating means for supporting said contact arm on said angle iron frame, a pair of contacts in said main circuit, and a thermo-sensitive switch carrying one of said contacts and mounted at one end of said frame, said thermo-sensitive switch being arranged to be mechanically operated by said armature, and to open said main circuit independently of said armature upon an increase in temperature caused by sparking of said switch.
  • an automatic safety switch comprising an angle iron frame member, a compound wound relay mounted on said frame member, an armature actuated by said relay, a right angled flanged portion of said armature, a contact arm of said dynamo voltage regulating means, insulating means for mounting said contact arm on said angle iron member, a contact on said flanged portion of said armature for displacing said contact arm between the contacts of said dynamo voltage regulating means, a pair of contacts in said main circuit, a thermo-sensitive bi-metal spring carrying one of said contacts and supported by said angle iron member and an element of thermo-conductivity connected with said bi-metal spring adjacent its contact for engagement with said flanged member of said armature, said bi-metallic spring being arranged to separate said contacts independently of

Landscapes

  • Engineering & Computer Science (AREA)
  • Power Engineering (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Sustainable Development (AREA)
  • Sustainable Energy (AREA)
  • Transportation (AREA)
  • Mechanical Engineering (AREA)
  • Thermally Actuated Switches (AREA)
  • Charge And Discharge Circuits For Batteries Or The Like (AREA)
  • Electromagnets (AREA)
US32742828 1927-12-17 1928-12-20 Electric switch Expired - Lifetime US1820361A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DEB135012D DE539584C (de) 1927-12-17 1927-12-17 Vereinigter elektromagnetischer Regler und Schalter fuer elektrische Anlagen auf Fahrzeugen

Publications (1)

Publication Number Publication Date
US1820361A true US1820361A (en) 1931-08-25

Family

ID=6998670

Family Applications (1)

Application Number Title Priority Date Filing Date
US32742828 Expired - Lifetime US1820361A (en) 1927-12-17 1928-12-20 Electric switch

Country Status (5)

Country Link
US (1) US1820361A (de)
CH (2) CH137319A (de)
DE (2) DE539584C (de)
FR (1) FR668182A (de)
GB (2) GB302590A (de)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2657351A (en) * 1948-04-28 1953-10-27 Kuhar Petter Electric regulator device and system for charging storage batteries

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE1031876B (de) * 1953-07-14 1958-06-12 Bosch Gmbh Robert Vorrichtung zum Ausgleich des Temperaturganges von elektromagnetischen Schnellreglern fuer Stromerzeuger

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2657351A (en) * 1948-04-28 1953-10-27 Kuhar Petter Electric regulator device and system for charging storage batteries

Also Published As

Publication number Publication date
GB302590A (en) 1930-02-20
DE539584C (de) 1931-11-28
CH159330A (de) 1932-12-31
DE588892C (de) 1933-11-29
CH137319A (de) 1929-12-31
GB377017A (en) 1932-07-21
FR668182A (fr) 1929-10-29

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