US2803814A - bloser - Google Patents

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US2803814A
US2803814A US60773645A US2803814A US 2803814 A US2803814 A US 2803814A US 60773645 A US60773645 A US 60773645A US 2803814 A US2803814 A US 2803814A
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circuit
switch
condenser
capacitor
cathode
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Priority to BE482082D priority Critical patent/BE482082A/xx
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Priority to US60773645 priority patent/US2803814A/en
Priority to GB17639/46A priority patent/GB636113A/en
Priority to FR939211D priority patent/FR939211A/fr
Priority to US743304A priority patent/US2444210A/en
Priority to GB9995/48A priority patent/GB655437A/en
Priority to FR45696A priority patent/FR74002E/fr
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    • H—ELECTRICITY
    • H03—ELECTRONIC CIRCUITRY
    • H03K—PULSE TECHNIQUE
    • H03K17/00—Electronic switching or gating, i.e. not by contact-making and –breaking
    • H03K17/28—Modifications for introducing a time delay before switching
    • H03K17/288—Modifications for introducing a time delay before switching in tube switches
    • G—PHYSICS
    • G05—CONTROLLING; REGULATING
    • G05B—CONTROL OR REGULATING SYSTEMS IN GENERAL; FUNCTIONAL ELEMENTS OF SUCH SYSTEMS; MONITORING OR TESTING ARRANGEMENTS FOR SUCH SYSTEMS OR ELEMENTS
    • G05B19/00—Programme-control systems
    • G05B19/02—Programme-control systems electric

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  • This invention relates to electrical timing apparatus, and particularly to that type of timing apparatus wherein a series of load devices are sequentially operated for a predetermined time and there is automatically provided a predetermined interval of time between cycles of operation.
  • An object of the invention is to provide improved electrical timing apparatus ⁇ controlled by the charged condition of a capacitor or condenser.
  • Another object of the invention is to provide a novel circuit for effecting a charging operation of the timing condenser through a diode so as to eliminate all unnecessary switch contacts and wearing parts.
  • Another object of the invention is to provide a novel circuit in which the charging operation of a timing condenser may be eiected through a diode and the electronic valve controlled thereby.
  • Another object of the invention is to provide a resistor connecting the timing condenser to the source of electrical energy during the charging operation and applying a positive bias to the cathode of the controlled tube so as to ldeionize the tube during the latter charging operation.
  • Another object of the invention is to provide a resistor connected across the plate and cathode of an electronic Valve so as to control the inductive voltage rise across a coil in the plate circuit so as to effect a greater time delay than would normally be obtained with the time constant and voltage of the main electronic supply source.
  • Another object of the invention is to provide novel manually operable means for selecting the interval of time between cycles of operation of the same.
  • Another object of the present invention is to provide novel electrical means for timing the periods of operation of an electric motor.
  • Another object of the invention is to provide improved timing apparatus for controlling the periods of inflation of a series of solenoid controlled inflatable elements or boots for preventing the accumulation of ice on or the removal of ice from aerofoil surfaces of an aircraft.
  • the latter 1system of inflatable elements may be of the type -described and claimed in the copending applications Serial Numbers 498,248 of Donald M. Lawrence, David Gregg and Myron L. Taylor, filed August 11, 1943, now U. S. Patent No. 2,515,519, and application Serial Number 498,250 of Myron L. Taylor, William B. Pond and Herbert A. Eayrs, filed August 11, 1943, now U. S. Patent No. 2,444,208, and all of which patents have been assigned to Bendix Aviation Corporation.
  • Figure 1 shows a plan view of the control panel and indicator lights of the present invention
  • FIG. 2 represents an electrical timing circuit embodying certain features of my invention
  • Figure 3 is a view of the circuit of Figure 2 with certain -non-pertinent elements omitted and showing the electron ilow during the charging operation of the tim ⁇ ing condenser by solid arrows, while the electron ow' during the discharging operation is indicated by dotted arrows;
  • Figure 4 is a view of a modified circuit from Figure 3 with the non-pertinent elements omitted and showing the electron ow during the charging operation by solid arrows and the electron flow during the discharging operation by dotted arrows;
  • Figure 5 represents an electrical timing circuit embodying a third form of the invention, including an electric motor.
  • FIG. 2 there i-s shown a system for timing the operation of a stepper relay 10 which controls the energization of a series of loads 11, indicated as a plurality of electromagnets.
  • the electronic timer is particularly adapted for use in conjunction with the manifold type of inflatable ice eliminating systems described in t-he aforenoted copending applications.
  • the electromagnets 11 may serve upon energization to open the boot-inflating valves automatically in the proper sequence and for proper time intervals.
  • the stepper relay 10 may be of a conventional type comprising an electromagnetic winding 12 which controls the movement of an armature 13 pivotally supported at 14.
  • a ratchet arm 15 is pivotally mounted on the armature 13 and is biased into engaging relation with a ratchet wheel 16 by a spring 17.
  • a second spring 18 biases the armature 13 in a counterclockwise direction into contacting relation with a stop 19.
  • a pawl 20 is biased into engaging relation with the teeth of the ratchet wheel 16 by a spring 21 so as to prevent rotation of the ratchet wheel 16 in a counterclockwise direction.
  • the opening of the switch 24 breaks the circuit of the electromagnet 12, as will be explained hereinafter. causing de-energization of the electromagnet 12, whereupon the spring 18 actuates the armature 13 in a counterclockwise direction causing the pawl 15 to impart an increment of movement to the ratchet wheel 16 in a clockwise direction.
  • the ratchet wheel 16 is connected through a suitable shaft 25 indicated herein by dotted lines to switch arms 26, 27, 28 and 29.
  • the switch arms 26, 27 and 28 are each arranged to contact in succession a series of contacts 26A-L, 27A-L and 28A-L.
  • the switch arms 26, 27 and 2S move from one contact to the next succeeding contact for each increment of movement imparted to the ratchet wheel 16 by the stepper relay 10 and upon one end of the switch arm moving out of contacting relation with the contact K the opposite end closes the contact L.
  • the switch contacts 26A-K are connected through suitable electrical conductors 30A-K, respectively to one terminal of corresponding load devices or electromagnets 11.
  • the opposite terminal of the electromagnets 11 are .conductor 34 which leads to a switch contact 35 controlledby a switch 36.
  • the switch 36 is connected by a conductor 37 through an electric light or indicator 38 to the negative terminal of the source of electrical energy 32.
  • suitable indicator lights 39A-K for each load device or boot operating solenoid.
  • the latter lights may be mounted on the panel of the timer or may be preferably provided in a separate unit as indicated in Figure 1.
  • Another light 39M is connected to the main energizing circuit by conductor 30M as will appear.
  • the lights 39A-M are connected by conductor 31A to the conductor 31 through a switch 31B.
  • the light 38 is arranged so as to indicate the timer is in operation, while the lights 39A-L will indicate the particular load device or ice eliminating boot in operation.
  • the light'39M indicates whether the system is energized.
  • the switch arm 36 is arranged so that it may alternatep be provided as desired.
  • the contact 26L is not connected to the load devices 11, soA that upon the switch arm 26 contacting the same, the circuit to all of the load devices 11 are open for a purpose which will appear hereinafter.
  • the switch arm 27 is arranged to successively close contacts 27A-L.
  • the latter contacts are interconnected by an electrical conductor 42 to a conductor 43.
  • conductor 43 is connected to the positive terminal of the source of electrical energy 32 through a conductor 43A so as to complete the circuit for the light 38, lights 39 and Vthe load devices 11.
  • the switch arms 27 by opening the contacts 27A-K in unison with the opening of contacts 26A-K by the switch arm 26 is arranged to reduce the arcing at contacts 26A-K by providing a series break. Similarly the switch arm 27 in opening the contacts 27A-L causes flickering of the light 38 which will indicate to the operator that the system is in operation.
  • a conductor 45 which leads to manually operable switches 46, 47, 48, 49 Land 50 connected in series and arranged to close respectively contacts I-K, H-G, E4F, D*C and A-B connected through suitable conductors to the circuits controlling the load devices or solenoids 11.
  • the switches 46, 47, 48, 49 and 50 thus provide manually operable means for controlling energization of the load devices or ice eliminating boot operating solenoids 1l. It will be noted, moreover, that since the latter switches are connected in series only one of the set of load devices may be energized at a time, through operation of the manual switch means. The latter arrangement thus prevents an overload from being inadvertently applied to the ice eliminating system.
  • the switch arm 28 is arranged to sequentially close contacts 28A-L connected to suitable resistor elements 51 for a purpose which will be explained hereinafter.
  • the shaft also drives a switch arm 29 arranged to actuate an oi normal switch 52 to an open position upon the switch arms 26, 27 and 28 being positioned so as to close the respective contacts 26L, 27L and 28L respectively.
  • the member 29 is adjusted out of contacting relation with the otnormal switch 52 soy as to permit the switch 52 to close for purposes which will be explained.
  • the winding 12 of the stepper relay 10 has one terminal connected by an electrical conductor 53 to conductor 43A and thus to the positive terminal of the source of electrical energy 32.
  • the opposite terminal of the winding 12 is connected by an electrical conductor 54 to an anode or plate 55 of an electronic valve 56.
  • the electronic valve 56 has a cathode 57, a control grid 58, a cathode shield grid 59, a heater or iilament 60 and the plate 55.
  • the cathode 57 is connected by a conductor 61 to one contact of the olf normal switch 52 while the opposite contact of the off normal switch 52 is connected by a conductor 62 to one contact of the switch 24.
  • the opposite contact of the switch 24 is connected by a conductor 63 to the negative terminal of the source of electrical energy 32.
  • the conductor 62 also leads to one contact of a push pull switch 64.
  • the opposite contact of the switch 64 is connected by a conductor 65 to the conductor 61 through a contact 66 and adjustable switch arm 67.
  • the cathode 57 may be connected to the negative terminal of the source of electrical energy 32 by closing the push pull switch 64 upon the switch arm 67 being adjusted to a position closing contact 66.
  • the switch arm 67 is mechanically connected to switch arms 68, 69, 70 and manually adjustable knob 71 through a shaft 72 for a purpose which will be explained hereinafter.
  • Other contacts controlled by the switch arm 67 include contact 72 which is an open contact and three contacts 73 which are electrically connected by a conductor 74 to the conductor 62.
  • contact 72 which is an open contact
  • contacts 73 which are electrically connected by a conductor 74 to the conductor 62.
  • the negative terminal of the source of electrical energy 32 may be connected to the cathode 57 upon the switch arm 67 closing one of the contacts 73.
  • the electron flow from the cathode 57 to the plate 55 is controlled by a grid 58 connected by a conductor 75 to one end of a resistor 76.
  • the opposite end of the resistor 76 is connected by a conductor 77 to a plate 78 of a condenser 79.
  • the opposite plate 80 of the condenser 79 is connected by a conductor 81 to the conductor 61.
  • the plate 78 is connected through a conductor 82 to the switch arm 28 previously described and which is arranged to close sequentially the contacts 28A through L.
  • resistors 51A-L Leading from the contacts28A through L, respectively are resistors 51A-L each of a value suicient to elect a predeterminedtime interval for energizing the load device 11 .corresponding thereto.
  • the resistors 51A-L may be of different value so as to effect different time intervals of operation for each load device.
  • a conductor 83 Leading from Vthe opposite terminals of the resistors 51A-L is a conductor 83 which leads to the conductor 43. Connected to the conductor 43 are four contacts 84 and there is provided a switch arm 70 for closing the same.
  • the conductor 43A connects the switch arm 7 0 to the positive terminal of -the source of electrical energy 32.
  • Cooperating with the switch arm 70 is a fth and open contact 86.
  • a conductor 87 Leading from the contacts 84 is a conductor 87 which connects the same to the switch arm 69.
  • the conductor 87 also connects the light 39M to the positive terminal of the source of electrical energy 32 through arm 70.
  • the switch arm 69 is arranged to selectively contact one of ve contacts including two open contacts 88 and three contacts 89 connected by an electrical conductor 90 to the resistor 51L at a point intermediate the opposite ends of the latter resistor.
  • the switch arm 68 is arranged to selectively contact one of the' five contacts including four open contacts 91 and one contact 92 from which a conductor 93 leads to the conductor 82.
  • a conductor 94 leads from the switch arm 63 to the plate of a second condenser 9S.
  • the op'- posite plate of the condenser 95 is connected to the conductor 81.
  • the condenser 79 or condensers 79 and 95 are charged through operation of a diode 100 having an anode 101, cathode 102 and heater or filament 103.
  • the anode 101 is connected by a conductor 104 to the conductor 82 leading to the plate 78 of condenser 79.
  • the cathode 102 is connected by a conductor 105 leading to the negative terminal of the source of electrical energy 32.
  • the conductor 105 also leads to a resistor 106 through which the conductor 105 is connected to one terminal of the heater or lament 60 of the electronic valve S6.
  • the opposite terminal of the filament 60 is -connected by a conductor 107 to one terminal of the heater or filament 103 of the diode 100.
  • a conductor 108 connects the opposite terminal of the filament 103 to the conductor 43. Through the conductor 43, .switch contacts 84, and switch arm 70, the conductor 108 is connected to the positive terminal of the source of electrical energy 32.
  • the shield grid 59 is connected to the negative terminal of the source of electrical energy 32 by a conductor 110 leading to the conductor 105.
  • a resistor 111 is connected between the anode 55 and the conductor 110 to limit the rise of induced voltage that occurs across the stepper relay coil 12 as its field decays.
  • the resistor 111 By proper choice of the resistor 111 the same may be so arranged as to allow a controlled voltage rise to occur which will be reflected in a higher charge voltage on the condenser 79 with a corresponding increase in the time of discharge for the same resistor 51, capacitor 79 and line voltage combination.
  • the foregoing electronic timer is particularly designed for use in conjunction with the manifold type of ice eliminating system for airfoil surfaces of aircraft and is arranged to open the boot inflating valves automatically in the proper sequence for the proper time intervals. Since ice does not form at the same rate or to the same degree on all occasions, a certain flexibility of control has been incorporated to permit the operator to vary certain components of the system to suit the prevailing conditions.
  • control system may be mounted o-n a control panel A which is preferably mounted in the Engineers Compartment of :the aircraft, while the indicator lights 39A-M and switch 31B are carried by a separate unit B.
  • the unit B is electrically connected with the control panel A through a conduit C as indicated in Figure 2 and the unit B is mounted apart from the control panel A.
  • the unit B is preferably mounted in the pilots compartment of the aircraft.
  • the panel A has mounted thereon the single control knob 71, indicator light 38 and I the emergency flip switches A-K for manually controlling the operation of the inflatable ice eliminating elements or boots.
  • the electronic flow during the charging action as indicated by solid arrows in Figure 3 is from the plate 80 of the condenser 79 though the electronic valve 56, from the cathode 57 to the plate 55, and through relay coil 12 to the positive terminal of the source of electrical energy 32.
  • the opposite plate 78 of the condenser 79 is negatively charged by an electronic flow from the negative terminal of the source of electrical energy 32 through the diode 100.
  • Plate 78 of condenser 79 is also connected by means of conductor 82 and resistance 51 to the positive side of the source of electrical energy 32, but since the resistance of diode 100 to electron flow in the charging direction is negligible compared to resistance 51, essentially the full line voltage is impressed across the condenser 79.
  • the diode 100 therefore, acts in the nature of a switch contact on charging to connect plate 78 of condenser 79 to the negative side of the source of electrical energy 32.
  • the resistor 111 serves to limit the rise of induced voltage that occurs across the stepper relay coil 12 as its field decays. By a proper choice of this resistor 111 there may be allowed a controlled voltage rise to occur that will be reflected in a higher charge voltage on the condenser 79 with a corresponding increase in the time of discharge for the same resistor 51, capacitor 79 and line voltage combination.
  • the condenser 79 is charged for a time interval determined by the impedance of the coil 12 in the charging circuit until the control grid 58 becomes biased sufficiently negative with respect to the cathode 57, because of the charge on the condenser 79, that electronic flow through the electronic valve 56 ceases and the stepper relay coil 12 becomes sufficiently deenergized as to release the switch 24. After the charging of the condenser 79, the remainder of the open time of the interrupter switch 24 allows the electronic valve 56 to deionize.
  • the spring 18 draws the ratchet arm 15 downward driving through the ratchet wheel 16, contact arms 26, 27 and 28 so as to close contacts 26A, 27A and 28A, while off normal switch arm 29 is moved to a position out of contacting relation with switch 52 so as to permit the same to close the circuit between the cathode and interrupter switch 24.
  • the downward movement of the ratchet arm 15 has also closed interrupter switch 24 so that the negative terminal of the source of electrical energy 32 is now connected through switches 24 and 52 to the cathode 57.
  • the condenser 79 has now been charged and provides a negative bias on the control grid 58 to prevent further firing of the electronic valve 56 until the condenser 79 has been discharged.
  • the condenser 79 discharges as indicated by dotted arrows.
  • the electron charge applied to the plate 78 of condenser 79 flows through switch arm 28 and resistor 51 to the positive terminal of the source of electrical energy 32, while there is electronic flow from the negative terminal through the closed switch 24 to the plate 80 of the condenser 79.
  • the duration of the discharge period will, of course, be dependent upon the value of the resistor 51 in the discharge circuit.
  • the diode 100 acts in the nature' of a switch on discharging to disconnect plate 78 of condenser 79 from the negative side of the source of electrical energy -32.
  • the diode 100 acts to replace a pair of contacts that would otherwise be necessary for connecting and disconnecting plate 78 of the condenser 79 for charging and discharging, respectively.
  • any unidirectional current device such as a dry plate rectifier or liquid electrolytic rectifier may be used.
  • a diode is preferable since the same has infinite resistance to reverse How.
  • the timer causes each boot to be inflated in turn once, after the starting button 64 is depressed and then waits until the starting button 64 is again depressed before proceeding with another intlation cycle. This operation is useful under low rate icing conditions.
  • Continuous operation may be effected by adjusting the knob 71 so as to position switch arm 67 so as to close one of the contacts 73.
  • the switch arm 67 will then shunt the single cycle switch 64 so that continuous operav tion may be effected,
  • switch arm 70 closes contact 84 to which conductor 83 is connected through conductor 43, it will be seen that the full resistance of resistor 51L will be connected into the discharge circuit of the condenser 79 so that the electronic valve 56 will be held from firing until the condenser 79 has discharged sufiiciently.
  • the latter interval is shown as a sixty second dwell, but the period may be for a greater or less period as ⁇ determined by the value of the resistor 51L.
  • the timer keeps repeating the inflating cycles just as in the previous operation, but docs not delay between successive inflation cycles.
  • the period of inflation for each boot may be increased for example by fty percent or any other predetermined amount.
  • This operation is particularly effective under high alti tude conditions and sub-normal air flows from the engine arr pump.
  • auxiliary hand operated switches 46, 47, 48, 49 and 50 connected so as to directly control the inflation andderlation of the several boots.
  • the timer may be cut off by adjusting the knob 71 so as to cause switch arms 67, 68, 69 and 70 to contact the ⁇ open contacts 72, 91, 8S, and 86 respectively.
  • FIG 4 there is shown a modified form of the invention which differs from the form shown in Figure 2 in the provision of a resistor 112 connecting the plate 80 of the condenser 79 directly to the positive terminal of the source of electrical energy 32.
  • a condenser 113 connected in parallel to the stepper relay coil 12 for momentarily maintaining the coil 12 energized upon the switch 24 openmg.
  • the armature 121 drives a shaft 123 indicated by dotted lines to which there is atiixed a cam 124 and gear 125 driving a gear train 126 which connects the shaft 123 to a second shaft 127 to which there is affixed the switch arms 26 and 28, as shown, together with a second cam 128.
  • the came 128 operates an oli? normal switch 52 connected across the switch 64 previously described with reference to Figure 2, while the cam 124 operates a switch 130 having make before break contacts in which a contact 131 is normally closed by a switch arm 132 having a contact 13'3 normally open in relation to a second switch arm 134.
  • the cam 124 has a cam surface 135 so arranged that upon initial energization of the motor 120 and rotation of the shaft 123 the switch arm 134 is actuated so as to first close the switch contact 133 and then actuate the switch arm 132 so as to open the contact 131. Upon continued rotation of the shaft 123 the surface causes the switch arm 134 to actuate the switch arm 132 so as to first close contact 13'1 before the switch arm 134 opens the contact 133.
  • the switch arm 132 and contact 133 are connected to conductor 61 leading to the negative terminal of the 9 source of electrical energy 32 through the off normal switch 52 or the switch 64 and conductor 62..
  • the contact 131 is connected by a conductor 131A leading to Ithe cathode 57.
  • the switch arm 134 is connected to a conductor 136 leading to the conductor 54 which connects the plate 55 and the :motor 120 as previously described.
  • a conductor 13'7 leads from the conductor 13.6 to a contact 138 controlled by the switch arm. 67.
  • the motor 120 rotates in a counterclockwise direction driving the cam 124 so as to causekswitch arm 134 of switch 130 to close contact 133 whereupon the electronic valve is shunted through conductor 136 and the motor is energized through conductor 136. Continued rotati-on causes switch arm 134 to actuate switch arm 132 so as lto open contact 131.
  • the condenser 79 Upon opening the contact 131 the condenser 79 is charged by an electronic flow from the negative terminal of the source of electrical energy 32, through the diode 100 tothe plate 78, and from the plate 80 through the resistor 1 12 to the positive terminal as previously eX- plained with reference to the form of Figure 4.
  • the switch arms 67, 68, 69 and 70 may be mechanically connected together so as to operate from a single manually adjustable knob 71 as previously described with reference to Figure 2, or the same may be separately operable so as to vary the effects produced thereby.
  • switch arm 67 In the case of switch arm 67, it will be noted that upon the same closing contact 138 as in the off position, motor 120 will drive without delay shafts 123 and 127 until cam 128 opens the off normal switch 52. During the latter operation, with switch arm 70 turned to its off position in which it contacts the open contact 86, the boot Valve operating solenoids will not be energized.
  • a time delay circuit controlling apparatus comprising an electronic valve having an anode and cathode connected in said time delay circuit and a control grid, av
  • capacitor connected between the grid and the cathode s o as to control said valve, charging and discharging circuits for said capacitor, an electromagnetic winding in said time delay circuit for alternately effecting said charging and discharging circuits, a source of electrical energy for said circuits, and said charging circuit including said electronic valve, said electromagnetic winding, and a resistor connected between the anode of said electronic valve and the negative terminal of the source of electrical energy, said resistor providing means for controlling the inductive voltage rise across the electromagnetic winding upon the opening of the time delay circuit.
  • a time delay circuit controlling apparatus including an electronic valve having an anode and cathode connected in said time delay circuit and a control grid, a capacitor connected between the grid and the cathode, a circuit for charging said capacitor and a circuit for discharging said capacitor, said capacitor applying a bias to said grid for controlling said electronic valve, and electromagnetic means connected in the time delay circuit; the improvement comprising a rst switch element in the time delay and discharging circuits and operated by said electromagnetic means to open said discharging circuit so as to effect a transfer of said capacitor from the discharging to the charging circuit upon energization of said electromagnetic means, and a second switch element effective upon the energization of said electromagnetic means for shunting said cathode and anode and said first switch element so as to maintain energization of said electromagnetic means while said charging circuit is applied to the capacitor, and means driven by said electromagnetic means for returning said second switch element to its original relationship to effect deenergization of said electromagnetic means.
  • a time delay circuit controlling apparatus including an electronic valve having an anode and cathode connected in said time delay circuit and a control grid, a capacitor connected between the grid and the cathode, a circuit for charging said capacitor and a circuit for discharging said capacitor, said capacitor applying a bias to said grid for controlling said electronic valve, and electromagnetic means connected in the time delay circuit; the improvement comprising a first switch element in the time delay and discharging circuits and operated by said electromagnetic means to opensaid discharge circuit so as to effect a transfer of said capacitor from the discharging to the charging circuit upon energization of said electromagnetic means, a second switch element effective upon the energization of said electromagnetic means for shunting said cathode and anode and first switch element so as to maintain energization of said electromagnetic means while said charging circuit is applied to the capacitor, means driven by said electromagnetic means for returning said first and second switch elements to the original relationship.
  • a time delay circuit controlling apparatus ofthe class including an electronic valve having an anode and cathode connected in said timedelay circuit and a control grid, a capacitor connected between the grid and the cathode, a circuit forA charging said capacitor and a circuit for discharging said capacitor, said capacitor applying a bias to said grid for controlling said electronic valve, and electromagnetic means connected in the time delay circuit; the improvement comprising a first switch element inthetime delay and discharging circuits and operated by said electromagnetic means to open the discharging circuit and effect a transfer of said capacitor from the discharging to the charging circuit upon energization of said electromagnetic means, a second switch element effective upon the energization of said electro- ".agnetic means for shunting said cathode and anode and first switch element so as to maintain energization of said electromagnetic means while said charging circuit is applied to the capacitor, means driven by said electromagnetic means for returning said first and second switch elements to the original relationship, and other means driven by said electromagnetic means for opening said time delay
  • a time delay circuit controlling apparatus comprising an electronic valve having an anode and a cathode connected in said time delay circuit and a control grid, a capacitor for controlling the operation of said electronic valve, a source of electrical energy, first ⁇ means including said first mentioned electronic valve connected at one side of said capacitor and another electronic valve connected at the opposite side of said capacitor so as to serially connect said source in circuit with said capacitor for charging the capacitor, second means including a discharge circuit for said capacitor, a switch member alternately operable to open said discharge circuit to make effective the charging circuit of said first means and to close said discharge circuit so as to connect said capacitor in shunt relation to said other electronic valve and said source in circuit with said capacitor to discharge the capacitor.
  • first means including said first mentioned electronic valve connected at one side of said capacitor and another electronic valve connected at the opposite side of said capacitor so as to serially connect said source in circuit with said capacitor for charging the capacitor
  • second means including a discharge circuit for said capacitor, a switch member alternately operable to open said discharge circuit to make effective the charging circuit of said first means and to close said discharge circuit so as to connect said capacitor in shunt relation to said other electronic valve and said source in circuit with said capacitor to discharge the capacitor, and an electromagnetic winding in the delay circuit for controlling the operation of said switch member to alternately make effective said charging and discharging circuits.
  • a -device of the character described comprising, in combination, an electronic valve having an anode, a cathode and a :control grid, said anode and cathode connected in a control circuit, means applying a bias to said grid for controlling said circuit, motor means operated periodically under control of said circuit, a plurality of load devices, switching means actuated by -said motor means to sequentially affect said load devices, a manually operable switch means to simultaneously render said motor actuated switching means ineffective and to shunt said anode and cathode so as to effect independent energizat'ion of said motor means, and means actuated by said motor means for opening said shunt circuit at a predetermined position of the motor means.
  • a time delay circuit controlling apparatus comprising, an electronic valve for controlling said circuit, a capacitor for controlling the operation of said electronic valve, an electromagnetic means in the time delay circuit controlled by the electronic valve, a switch member in the time delay circuit, said switch member alternately opened and closed by said electromagnetic meansa charging circuit for said capacitor effective upon the opening of the time delay circuit by the switch memberand a discharging circuit for said capacitor effective uponthe closing of the time delay circuit by said switch member, a source of electrical energy for said 14 circuits, said charging circuit including unidirectional conductive means, and said switch element in said time delay and discharging circuits and arranged to connect said capacitor in shunt relation to said unidirectional conductive means for discharging said capacitor.
  • an apparatus for controlling a plurality of cyclically operable inflatable ice removing elements on airfoil surfaces of an saiucraft comprising electrical control means for timing the period of inflation of each of the ice removing elements, electric light means adapted to be connected to a source of electrical energy, means operated by said control means to periodically connect said electric light to said source means for visually indicating the interval of inllation of each ice removing element, and manually operable switch means for selectively connecting said light means to said operated means to indicate said intervals of inflation and across said source for indicating the electrical condition of the source.
  • the combination comprising electrical control means for timing the period of inflation of each of the ice removing elements, electric light means adapted to be connected to a source of electrical energy, switch means operated by said control means to selectively connect said light means to said source for visually indicating the interval of inflation of eachice removing element, other electric light means, said switch means operated by said control means to selectively connect said other ⁇ light means to said source for visually indicating the period of inoperation of said elements between cycles ot operation, additional electric light means for.
  • an electromagnetic relay having an operating winding and operative to pick up and to drop out at predetermined current values respectively in said winding, a tirst circuit for initially connecting said winding across a source of unidirectional voltage for energizing said winding at the pick up current value of said relay, and a second circuit for serially connecting said condenser and said winding across said source of unidirectional voltage for charging said condenser, of means for alternately effecting operation of said iirst and second circuits, a by-pass circuit connected in parallel with said condenser to provide an additional path for current flowing to said winding, the sum of the currents flowing to said winding through said second circuit during the charging period of said condenser and through said by-pass circuit being greater than the drop out current value of said relay, and a resistor in said by-pass circuit, the resistance of said resistor and of said relay winding being so related to the voltage of said source that the current flowing through said bypass circuit
  • a time delay control comprising an electronic flow resistance means, a switch operable when closed to connect one end of said resistance means to one side of a source of direct current, a condenser, means connecting said condenser between said one end of said resistance means and the one side of said source of current, a resistor connected between siad one side of said source and the other end of said resistance means, an electromagnetic device having an operating winding connected between said other side of said source and said other end of said resistance means, said winding when energized operating said device to open said switch so as to cause charging of said condenser by said source of current through said resistance means and operating winding, the sum of the current flowing to said winding from said condenser and the current flowing to the winding through said resistor during the charging of said condenser' is snticient to hold said device in operated position whereas the current flowing to said winding through said resistor is insucient of itself to hold said device in operated position.
  • a recycling timing apparatus comprising a condenser, relay means, an electron discharge device having an anode, cathode and control electrode, means connecting said condenser to said control electrode and said re- Ylay means in energizing relation to said anode, a source of direct current control vo-ltage, circuit means including an electrical resistance means for connecting said condenser to said source to charge said condenser, said relay means controlling said circuit means, said relay means when energized by said discharge device rendering said circuit means effective to charge said condenser through a tirst time interval until said control electrode renders said discharge device inoperative whereupon said relay means becomes de-energized, means actuated by said relay means when de-energized to connect said condenser in a discharging circuit, means connected in said discharge circuit for delaying the discharge of said condenser through a second time interval and until the voltage thereon renders said discharge device conductive to energize said relay means and thereby restart the charging of said-condenser for the first
  • An electronic sequence timer including at least one electric discharge device for controlling the sequencing of said timer, said device having associated therewith a timing network which when set times the operation of said device; characterized by a single control discharge device having conductive and non-conductive states connected in circuit with said network; means responsive to said control device when it passes from one state to the other to set said network and means responsive to said device when it passes from said other state to said one state to initiate the timing operation of said network.
  • a iirst electric discharge device having an anode, a cathode, and a control electrode; means including a capacitor cooperative with said control electrode and including a timing network which when set maintains said device in non-conductive condition during an interval in which the capacitor discharges and which timing network after a predetermined time interval renders said device conductive during an interval in which the capacitor charges; a second electric discharge device;
  • means for maintaining said second device non-conductive during the interval in which the capacitor discharges means for rendering said second device conductive; means cooperative with said timing means and said second device for setting said timing means when said second device is rendered conductive and means for thereafter rendering said second device non-conductive to initiate the timing of said timing means.
  • An electronic timing device comprising means for supplying an energizing current and biasing voltage, an electron valve -having control grid, cathode and anode electrodes, a relay connected in series between said anode electrode and said current supply means, said relay operating responsive to flow of current in said valve, a charging circuit comprising a condenser and resistor in series, said condenser being connected between said control grid electrode and said cathode electrode, and means for connecting both said condenser and said control grid electrode to said biasing voltage supply means upon operation of said relay.
  • a timing device comprising a source of electrical energy; a tube of the electronic valve type with anode, cathode and control electrode; means to connect a controlled electromagnetic winding in series with said anode and cathode; a resistor and means to connect said resistor yacross said cathode and anode, said resistor providing means for controlling the inductive voltage rise across the electromagnetic winding when said tube is non-conductive with the electromagnetic Winding and resistor in series; and means to connect said anode and cathode to said source of electrical energy and to bring said control electrode to ring potential.

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  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Engineering & Computer Science (AREA)
  • Automation & Control Theory (AREA)
  • Relay Circuits (AREA)
  • Photoreceptors In Electrophotography (AREA)
  • Lighting Device Outwards From Vehicle And Optical Signal (AREA)
  • Keying Circuit Devices (AREA)
US60773645 1945-07-30 1945-07-30 bloser Expired - Lifetime US2803814A (en)

Priority Applications (7)

Application Number Priority Date Filing Date Title
BE482082D BE482082A (enrdf_load_stackoverflow) 1945-07-30
US60773645 US2803814A (en) 1945-07-30 1945-07-30 bloser
GB17639/46A GB636113A (en) 1945-07-30 1946-06-12 Electronic timer
FR939211D FR939211A (fr) 1945-07-30 1946-07-30 Dispositif perfectionné de contrôle chrono-électrique
US743304A US2444210A (en) 1945-07-30 1947-04-23 Electronic timer
GB9995/48A GB655437A (en) 1945-07-30 1948-04-09 Improvement in electronic timers
FR45696A FR74002E (fr) 1945-07-30 1948-04-23 Dispositif perfectionné de contrôle chrono-électrique

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
US60773645 US2803814A (en) 1945-07-30 1945-07-30 bloser

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US2803814A true US2803814A (en) 1957-08-20

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US60773645 Expired - Lifetime US2803814A (en) 1945-07-30 1945-07-30 bloser
US743304A Expired - Lifetime US2444210A (en) 1945-07-30 1947-04-23 Electronic timer

Family Applications After (1)

Application Number Title Priority Date Filing Date
US743304A Expired - Lifetime US2444210A (en) 1945-07-30 1947-04-23 Electronic timer

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US (2) US2803814A (enrdf_load_stackoverflow)
BE (1) BE482082A (enrdf_load_stackoverflow)
FR (2) FR939211A (enrdf_load_stackoverflow)
GB (2) GB636113A (enrdf_load_stackoverflow)

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US2950422A (en) * 1957-05-09 1960-08-23 Air Reduction Electronically controlled time delay apparatus
US2978970A (en) * 1956-08-23 1961-04-11 Compur Werk Friedrich Deckel Photographic shutter construction
US2987711A (en) * 1957-08-22 1961-06-06 Eastman Kodak Co Process programming timer
US2989667A (en) * 1958-01-13 1961-06-20 Lloyd V Swink Sequential timer and controller
US3129361A (en) * 1959-02-12 1964-04-14 Philco Corp Control mechanism for laundering equipment
US3200303A (en) * 1961-10-09 1965-08-10 Telsco Ind Timing control units
US3207926A (en) * 1962-07-06 1965-09-21 Bell Telephone Labor Inc Stabilized timing network
US3454851A (en) * 1965-03-31 1969-07-08 Bendix Corp Resequencing control system and timing means
US3672610A (en) * 1968-06-24 1972-06-27 Levin Igor A Electric system of a device for deicing the surface of thin-walled structures
US3700922A (en) * 1970-09-21 1972-10-24 Ibm Fast acting turn-off circuit

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US2601403A (en) * 1948-03-19 1952-06-24 Bell Telephone Labor Inc Electric circuit
US2684818A (en) * 1951-01-25 1954-07-27 Bendix Aviat Corp Control device for inflatable ice eliminating systems
US2670161A (en) * 1951-08-10 1954-02-23 Bendix Aviat Corp Control mechanism and apparatus for an ice eliminating system having inflatable members and heater elements
US2918766A (en) * 1952-03-19 1959-12-29 Johnson Fare Box Co Roll handling machine
US2803407A (en) * 1952-07-30 1957-08-20 Welding Research Inc Counting system including step-by-step devices providing predetermined operation
US3002112A (en) * 1959-07-22 1961-09-26 North American Aviation Inc Driving circuit for electromechanical switching devices
US3221174A (en) * 1962-06-04 1965-11-30 Gen Motors Corp Timing circuit with means for selectively alternating the timing pulses
US3119021A (en) * 1962-10-01 1964-01-21 Howard I Podell Variable time delay sequencing arrangement
US3320431A (en) * 1963-12-26 1967-05-16 Bough Bjorn N De Multi-station variable timing apparatus
US3381177A (en) * 1966-05-03 1968-04-30 Gen Electric Variable sequential time control relay system
US4915629A (en) * 1988-04-15 1990-04-10 Sellers Grady C Direct assembly framework for an osseointegrated implant

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US1412568A (en) * 1922-04-11 Assionob to the ctttleb
US2032746A (en) * 1928-10-26 1936-03-03 Kidde & Co Walter Detection of suspended matter in fluids
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US2165048A (en) * 1937-08-26 1939-07-04 Westinghouse Electric & Mfg Co Electric discharge apparatus
US2279007A (en) * 1939-03-25 1942-04-07 Rca Corp Time delay circuit and relaxation oscillator
US2288458A (en) * 1940-12-18 1942-06-30 Crouse Hinds Co Cycle timer control apparatus for traffic signals
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US2339750A (en) * 1941-04-11 1944-01-25 Westinghouse Electric & Mfg Co Time delay circuit
US2337905A (en) * 1941-07-23 1943-12-28 Gen Electric Time delay relay
US2343918A (en) * 1943-05-11 1944-03-14 Howard M Mccoy Means for deicing propeller spinners
US2373255A (en) * 1943-06-24 1945-04-10 Honeywell Regulator Co Supervisory apparatus
US2444208A (en) * 1943-08-11 1948-06-29 Bendix Aviat Corp Control system, apparatus, and method for the elimination of ice from aircraft
US2471834A (en) * 1944-12-09 1949-05-31 Gen Electric Electronic relay
US2444209A (en) * 1944-12-18 1948-06-29 Bendix Aviat Corp Electronic timer control for inflatable boots on aircraft
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US2549149A (en) * 1945-04-25 1951-04-17 Electric Controller & Mfg Co Time delay control
US2506394A (en) * 1946-12-13 1950-05-02 Mine Safety Appliances Co Multiple sampling valve circuit

Cited By (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2978970A (en) * 1956-08-23 1961-04-11 Compur Werk Friedrich Deckel Photographic shutter construction
US2950422A (en) * 1957-05-09 1960-08-23 Air Reduction Electronically controlled time delay apparatus
US2987711A (en) * 1957-08-22 1961-06-06 Eastman Kodak Co Process programming timer
US2989667A (en) * 1958-01-13 1961-06-20 Lloyd V Swink Sequential timer and controller
US3129361A (en) * 1959-02-12 1964-04-14 Philco Corp Control mechanism for laundering equipment
US3200303A (en) * 1961-10-09 1965-08-10 Telsco Ind Timing control units
US3207926A (en) * 1962-07-06 1965-09-21 Bell Telephone Labor Inc Stabilized timing network
US3454851A (en) * 1965-03-31 1969-07-08 Bendix Corp Resequencing control system and timing means
US3672610A (en) * 1968-06-24 1972-06-27 Levin Igor A Electric system of a device for deicing the surface of thin-walled structures
US3700922A (en) * 1970-09-21 1972-10-24 Ibm Fast acting turn-off circuit

Also Published As

Publication number Publication date
BE482082A (enrdf_load_stackoverflow) 1900-01-01
GB636113A (en) 1950-04-26
GB655437A (en) 1951-07-18
FR939211A (fr) 1948-11-08
FR74002E (fr) 1960-11-07
US2444210A (en) 1948-06-29

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