US1800525A - Interlocking switching arrangement - Google Patents

Interlocking switching arrangement Download PDF

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Publication number
US1800525A
US1800525A US177377A US17737727A US1800525A US 1800525 A US1800525 A US 1800525A US 177377 A US177377 A US 177377A US 17737727 A US17737727 A US 17737727A US 1800525 A US1800525 A US 1800525A
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US
United States
Prior art keywords
circuit
filament
anode
rheostat
operating means
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
US177377A
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English (en)
Inventor
Clarence W Hansell
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.)
RCA Corp
Original Assignee
RCA Corp
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
Priority to NL22782D priority Critical patent/NL22782C/xx
Application filed by RCA Corp filed Critical RCA Corp
Priority to US177377A priority patent/US1800525A/en
Application granted granted Critical
Publication of US1800525A publication Critical patent/US1800525A/en
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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Classifications

    • H—ELECTRICITY
    • H03—ELECTRONIC CIRCUITRY
    • H03F—AMPLIFIERS
    • H03F1/00—Details of amplifiers with only discharge tubes, only semiconductor devices or only unspecified devices as amplifying elements
    • H03F1/52—Circuit arrangements for protecting such amplifiers
    • H03F1/54—Circuit arrangements for protecting such amplifiers with tubes only
    • H03F1/546—Delaying application of anode power supply with respect to application of filament heating power supply

Definitions

  • This invention relates to an interlocking switching arrangement, and more particularly to such an arrangement applied to the circuits associated with electron emission tubes;
  • the limiting contactor will have opened. Nevertheless, the operating means -'jforthe filament circuit should at this time be operative in order that the filament ciris at one of its extreme adjustments, will; nevertheless, be operative for the other of v its functions.
  • the specification 1 is accompanied a t t p v drawing in which- 7 Figure 1 is a wiring diagram for a pre-.
  • aZrelay operated switch In series with-this supply thereis aZrelay operated switch.
  • S and a filament rheostat The rheostat R comprises resistanceelement 8 and a control means 10 for cutting in or out more or less of the resistance 8. rWhen all of the resistance is cut in,-that is, when the control means 10 is at ,its.lowermost' position, it engages and closes the limiting contactor 12.
  • the control switch 14 may be considered broadly anoperatingmeans for opening or. closing the power supply circuit; If the lim-I iting 'contactor 12' is. depressed when-the operating means 14 is closed a circuit is esablished through the magnet ;16 which attracts the armature 18', and: so closes the switch S If the resistanceJS is notentirely outin circuit then the. limiting contactor 12 err once the switch has been closed, then if the rheostat control 10 is rotated to cut out part of the resistance 8, and the limiting con- 'tactor 12 opens, nevertheless the switch S will not be opened for the reason that a circuit is established through the ext raholdingcontactQZO which short circuits the limiting? contactor 12.
  • the operating means le -isinoperative to close file ment heating circuit when-the filameifti rhe'o' stat is not entirely out in cirouit,or in other words, full filament potential cannot beap plied to the filament when it, is cold, yet the. operating means is always'elfective" the; filament heating circuit; V
  • the direct current supply for the anode cathodecircuit isobtained from a rectifier 26),,tp'j which an alternating current'supply is led by way of the conductors 28.
  • a sweet S @h cou-rse a direet -cu'rrent supply other than are'ctifier may be employed, and in some cases it might prove preferable to lodeterminant-switch S in the direct current leads themselves.
  • This switch S like S any" operatedby' means of a magnet 30 andhnopereiti-ng switch 32, which closes the relay magnetacircuit, i To prevent its being closed; while the filament?
  • the filament rheostat B may be used: as a filament temperature control as Well as-;a startingresistance, for thereasonthat the? control 10. maybe backed fromthe; con;- tac'tor 34' once the switch S has beenclosed; This is; accomplished; by employing a hold ing contact 36,-: which shortcircuits-the-con factor 34;, V I .7 7
  • a circuit associated with said tubegioperatinga means; for opening: or closing said circuit;
  • an electron emission tube a filament heating circuit including a source of filament heating current, a starting rheostat for gradually building up the magnitude of said current, operating means for opening or closing the circuit, and means to make said operating means inoperative to close said circuit when the resistance of the starting rheostat is partially and not fully in circuit.
  • an electron emission tube a filament heating circuit including a source of filament heating current, a starting rheostat for gradually building up the magnitude of said current, operating means for opening or closing the circuit, and means to make said operating means always operative to open said circuit but inoperative to close said circuit when the resistance of the starting rheostat is partially and not fully in circuit.
  • an electron emission tube a cathode heating'circut therefor including controlling means to control the cathode temperature, an anode circuit including operating means to open and close said anode circuit, and means, responsive to the cathode temperature controlling means, for rendering the operating means inoperative to close the anode circuit untilthe filament temperature has] been brought'substantially to its normal working temperature.
  • an electron emission tube a cathode heating circuit including controlling means to control the cathode temperature, an anode circuit .including operating means toopen and close said anode circuit, and means, responsive to the cathode temperature controlling means'for rendering the operating means operative to open the anode circuit and inoperative to close said circuit until the cathode temperature has been brought substantially to its normal working temperature.
  • rheostat for controlling the heating current, an anode circuit, a source of anode current, operating means to connect and disconnect said source and said anode circuit, and means to make the operating means inoperative to connect the source and the anode circuit when the filament rheostat is not substantially cut out of circuit.
  • An interlocking switching arrangement for an electron emission tube and its associated cathode and anode circuits comprising operating means to open and close said cathode operating means upon substantial inclusion of the rheostat resistance in circuit, thereby preventing sudden heating of the cathode, and, means responsive to the movement of: said rheostat for rendering operative said anode. operating means upon removal of the rheostat resistance from the cathode circuit.
  • an electron emission tube having a heated cathode, a heating circuit including a starting rheostat for grad- 'ually applying the heating current, a relay operated switch for opening and closing the heating circuit, operating means for the relay, and means to make the operating means inoperative to close the switch when the resistance of the starting rheostat is not fully in circuit.
  • An interlocking switching arrange- ,ment comprising an electron emission tube vhaving an anode and a heated cathode, a
  • heating circuit including a starting rheostatfor gradually applying the heating current, a firstorelay operated switch for opening and closing the heating circuit, an anode circuit, a source of anode current, a second relay operated' switch for connecting and disconnecting said source and said anode circuit, operating means for the relays, and means to make the operating means inoperative to close the first switch when theresistance of the rheostat is not fully in circuit, and inoperative to close the second switch when the rheostat is not substantially cut out of circuit.
  • an electron emission tube means for gradually building up the cathode heating current therefor, a circuit associated with the tube, operating means for opening or closing said circuit, and means to make said operating means inoperative for one of its functions when said current building up means is set near one of its extremes of adjustment even though not open circuited.

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  • Engineering & Computer Science (AREA)
  • Power Engineering (AREA)
  • Electron Sources, Ion Sources (AREA)
US177377A 1927-03-22 1927-03-22 Interlocking switching arrangement Expired - Lifetime US1800525A (en)

Priority Applications (2)

Application Number Priority Date Filing Date Title
NL22782D NL22782C (enrdf_load_stackoverflow) 1927-03-22
US177377A US1800525A (en) 1927-03-22 1927-03-22 Interlocking switching arrangement

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
US177377A US1800525A (en) 1927-03-22 1927-03-22 Interlocking switching arrangement

Publications (1)

Publication Number Publication Date
US1800525A true US1800525A (en) 1931-04-14

Family

ID=22648362

Family Applications (1)

Application Number Title Priority Date Filing Date
US177377A Expired - Lifetime US1800525A (en) 1927-03-22 1927-03-22 Interlocking switching arrangement

Country Status (2)

Country Link
US (1) US1800525A (enrdf_load_stackoverflow)
NL (1) NL22782C (enrdf_load_stackoverflow)

Also Published As

Publication number Publication date
NL22782C (enrdf_load_stackoverflow)

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