US3050933A - Device for protecting thermo-dynamic engines - Google Patents

Device for protecting thermo-dynamic engines Download PDF

Info

Publication number
US3050933A
US3050933A US3828A US382860A US3050933A US 3050933 A US3050933 A US 3050933A US 3828 A US3828 A US 3828A US 382860 A US382860 A US 382860A US 3050933 A US3050933 A US 3050933A
Authority
US
United States
Prior art keywords
source
action
temperature
transducer means
photosensitive transducer
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
US3828A
Other languages
English (en)
Inventor
Fokker Herman
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.)
US Philips Corp
North American Philips Co Inc
Original Assignee
US Philips 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
Application filed by US Philips Corp filed Critical US Philips Corp
Application granted granted Critical
Publication of US3050933A publication Critical patent/US3050933A/en
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

Links

Images

Classifications

    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
    • F02G—HOT GAS OR COMBUSTION-PRODUCT POSITIVE-DISPLACEMENT ENGINE PLANTS; USE OF WASTE HEAT OF COMBUSTION ENGINES; NOT OTHERWISE PROVIDED FOR
    • F02G1/00—Hot gas positive-displacement engine plants
    • F02G1/04—Hot gas positive-displacement engine plants of closed-cycle type
    • F02G1/043—Hot gas positive-displacement engine plants of closed-cycle type the engine being operated by expansion and contraction of a mass of working gas which is heated and cooled in one of a plurality of constantly communicating expansible chambers, e.g. Stirling cycle type engines
    • F02G1/045—Controlling
    • F02G1/047—Controlling by varying the heating or cooling
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
    • F02G—HOT GAS OR COMBUSTION-PRODUCT POSITIVE-DISPLACEMENT ENGINE PLANTS; USE OF WASTE HEAT OF COMBUSTION ENGINES; NOT OTHERWISE PROVIDED FOR
    • F02G1/00—Hot gas positive-displacement engine plants
    • F02G1/04—Hot gas positive-displacement engine plants of closed-cycle type
    • F02G1/043—Hot gas positive-displacement engine plants of closed-cycle type the engine being operated by expansion and contraction of a mass of working gas which is heated and cooled in one of a plurality of constantly communicating expansible chambers, e.g. Stirling cycle type engines
    • F02G1/053—Component parts or details
    • F02G1/055—Heaters or coolers
    • 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
    • G05B1/00—Comparing elements, i.e. elements for effecting comparison directly or indirectly between a desired value and existing or anticipated values
    • G05B1/01—Comparing elements, i.e. elements for effecting comparison directly or indirectly between a desired value and existing or anticipated values electric
    • G05B1/04—Comparing elements, i.e. elements for effecting comparison directly or indirectly between a desired value and existing or anticipated values electric with sensing of the position of the pointer of a measuring instrument
    • G—PHYSICS
    • G05—CONTROLLING; REGULATING
    • G05D—SYSTEMS FOR CONTROLLING OR REGULATING NON-ELECTRIC VARIABLES
    • G05D23/00—Control of temperature
    • G05D23/19—Control of temperature characterised by the use of electric means
    • G05D23/1906—Control of temperature characterised by the use of electric means using an analogue comparing device
    • G05D23/1912—Control of temperature characterised by the use of electric means using an analogue comparing device whose output amplitude can take more than two discrete values
    • G—PHYSICS
    • G05—CONTROLLING; REGULATING
    • G05D—SYSTEMS FOR CONTROLLING OR REGULATING NON-ELECTRIC VARIABLES
    • G05D23/00—Control of temperature
    • G05D23/19—Control of temperature characterised by the use of electric means
    • G05D23/20—Control of temperature characterised by the use of electric means with sensing elements having variation of electric or magnetic properties with change of temperature
    • G—PHYSICS
    • G05—CONTROLLING; REGULATING
    • G05D—SYSTEMS FOR CONTROLLING OR REGULATING NON-ELECTRIC VARIABLES
    • G05D23/00—Control of temperature
    • G05D23/19—Control of temperature characterised by the use of electric means
    • G05D23/20—Control of temperature characterised by the use of electric means with sensing elements having variation of electric or magnetic properties with change of temperature
    • G05D23/22—Control of temperature characterised by the use of electric means with sensing elements having variation of electric or magnetic properties with change of temperature the sensing element being a thermocouple
    • G05D23/2236—Control of temperature characterised by the use of electric means with sensing elements having variation of electric or magnetic properties with change of temperature the sensing element being a thermocouple details of the regulator
    • G05D23/2239—Control of temperature characterised by the use of electric means with sensing elements having variation of electric or magnetic properties with change of temperature the sensing element being a thermocouple details of the regulator using photoelectric elements
    • G—PHYSICS
    • G05—CONTROLLING; REGULATING
    • G05D—SYSTEMS FOR CONTROLLING OR REGULATING NON-ELECTRIC VARIABLES
    • G05D23/00—Control of temperature
    • G05D23/19—Control of temperature characterised by the use of electric means
    • G05D23/20—Control of temperature characterised by the use of electric means with sensing elements having variation of electric or magnetic properties with change of temperature
    • G05D23/24—Control of temperature characterised by the use of electric means with sensing elements having variation of electric or magnetic properties with change of temperature the sensing element having a resistance varying with temperature, e.g. a thermistor
    • G05D23/2451—Details of the regulator
    • G05D23/2454—Details of the regulator using photoelectric elements

Definitions

  • thermodynamic apparatus of the hot-gas reciprocating type are well known and described in the art; see, for example, Air Engines, H. Rinia et a1., and The Construction of the Philips Air Engine, F. L. van Weenen, Philips Technical Review, a publication of the assignee herein, vol. 8, No. 5, pp. 129-160, 1946; and vol. 9, No. 5, pp. 125160, 1947, respectively.
  • the cylinder of such type apparatus contains a Working substance usually in the form of a gas such as air, which is subjected systematically to a. cycle of isothermic and isochoric phases in a predetermined manner.
  • the cylinder is divided into two parts, one of which is maintained at a high temperature.
  • the other part is maintained at a substantially lower temperature.
  • the working substance is repeatedly transposed between the two parts.
  • the working substance occupies the part maintained at the low temperature it is subjected to an isothermal compression.
  • the working substance is subsequently transformed to the high temperature part of the cylinder, the working substance undergoes an isothermal expansion. Since the isothermal expansion takes place at a high temperature, greater energy is released than that expended to subject the working substance to the isothermal compression at the low temperature.
  • the resulting net energy is utilized to drive a suitable piston and crankshaft arrangement associated with the cylinder.
  • heater means are disposed at the location of the high-temperature part of the cylinder and are heated by a suitable source of heat energ as, for example, a burner supplied by a compatible combustible mixture.
  • An object of this invention is to provide a temperature responsive control circuit device for the protection of a controllable system or apparatus against temperatures above and below a predetermined temperature range.
  • the invention has for another object the provision of a control device of the kind set forth, which operates rapidly in a reliable manner and which stabilizes the temperature of the aforementioned apparatus.
  • Still another object of this invention is to provide a temperature responsive control circuit device for the protection of hot-gas reciprocating apparatus against tem- 3,5,933 Patented Aug. 28, 19962 peratures above and below the operating temperature range of the apparatus.
  • Still another object of this invention is the provision of a control device for hot-gas reciprocating apparatus hav ing a plurality of cylinders which protects the remaining cylinders when one or more cylinders thereof experiences an excessively high and/ or low temperature.
  • this invention features a temperature responsive control circuit to control the action of a controllable system such as, for example, the heater system of a hot-gas reciprocating apparatus having one or more cylinders.
  • the circuit comprises thermal-electrical transducer means to provide a signal proportional to the temperature sensed thereby and indicator means having a movable member which is responsive to the signal.
  • a pair of photosensitive transducer means which are associated with compatible output means that are coupled to the controllable system, are adapted for mutually exclusive light energy coupling relationship with a light source.
  • An opaque member which is coupled to the movable member, is adapted to be disposed between the light source and a predetermined one of the photosensitive transducer means at temperatures below a given temperature range of at least one temperature to stop the action of the controllable system.
  • the opaque member is also adapted to be disposed between the light source and the other of the photosensitive transducer means at temperatures above the given temperature range to stop the action.
  • Another feature of this invention is to provide a temperature responsive control circuit of the type af0redescribed further comprising a third photosensitive transducer means which is also associated with a compatible output means that is coupled to the controllable system.
  • the third photosensitive transducer means is likewise adapted to be in light coupling relationship with the light source, and the opaque member is further adapted to adjust the light coupling relationship between the third photosensitive transducer and the light source to regulate the action of the controllable system, such as, for example, the aforementioned heater system for a hot-gas reciprocating apparatus, within the given temperature range.
  • FIG. 1 is a perspective drawing of the control device of this invention which includes a sectional view of the high temperature part of a cylinder of a hot-gas reciprocating apparatus;
  • FIG. 2 is a schematic diagram of the control device of this invention.
  • FIG. 3 is a schematic diagram of another embodiment of this invention for application with multi-cylinder hotgas reciprocating apparatus.
  • FIG. 1 there is illustrated as a sectional view thereof, high temperature part 20 of a hot-gas reciprocating apparatus cylinder.
  • Part 20 comprises cylinder wall 21, piston 22 and chamber 23 which contains the working medium of the hot-gas reciprocating apparatus.
  • Piston 22 is coupled to a suitable crankshaft arrangement, not shown, via the piston rod 22a, in a manner well known to those skilled in the art.
  • Cylinder part 20 has associa-ted therewith suitable heat transfer means, illustrated as heater means 24 comprising, by way of example only, a plurality of orthogonal radiating fins, such as, annular shaped fins 25a and the radial fins 25b, which transfer heat generated from a heat source, illustrated, byway of example only, as annular burner 26.
  • heater means 24 comprising, by way of example only, a plurality of orthogonal radiating fins, such as, annular shaped fins 25a and the radial fins 25b, which transfer heat generated from a heat source, illustrated, byway of example only
  • a source 27 of compatible heat energy supply is coupled to the heat source, and is illustrated in FIG. 1 as a source of a combustible fuel mixture for burner 26. Disposed between source 27 and the heat source, are electrically operated control means 28, 29, illustrated in block form, which are compatible to the heat source and source 27 of heat energy utilized by the hot-gas apparatus.
  • electrically operated control means 23, 29 compose a pair of electrically driven fuel valves, each of which controls the fuel supplied from source 27 to burner 26 in a predetermined manner as will be explained hereinafter.
  • the heater means and source of heat energy supply are chosen by way of example only, and may comprise other types, such as an all electrical system comprising an electrical heat source, a source of electric energy, and compatible electrical control means to control the electrical energy thereof supplied to the electrical heat source.
  • indicator 30 is illustrated, by Way of example only, as a current meter for use in a device according to the invention.
  • Indicator 30 is connected to a suitable thermal-electrical transducer means, and which may comprise, for example, thermoelement 31 which is arranged in the proximity of the heater means 24; as an alternative, it may be connected to a bridge circuit comprising at least one temperaturedependent resistor.
  • indicator 30 is provided with a suitable movable member 30a that is responsive to temperature variations occurring at the heater means 24.
  • the movable member 30a may comprise a pointer that serves at the same time for the indication of the temperature and it is therefore to be preferred to calibrate the face plate 30b of indicator 30 in degrees centigrade.
  • FIG. 1 Behind three openings 1, 2 and 3 in the face plate 3% are placed three lamps 1', 2 and 3', illustrated in FIG. 1 by a dashed outline, which coact with holes I, 2, 3, respectively, to provide a source of light in energy coupling relationship with photosensitive transducer circuit means which comprises elements 5-49, inclusive, of FIG. 2 as will be explained in greater detail hereinafter.
  • the openings are screened by an opaque member 4, secured to the movable member, so that the light passing through the openings is intercepted and/ or adjusted. It will often be possible to use a single lamp for two or even for the three openings.
  • photosensitive devices which may be of the vacuum tube variety or, as illustrated in FIG. 2, are, preferably photosensitive current carrier devices such as photo transistors 5, 6, 7.
  • the photosensitive circuit means of FIG. 2 is preferably contained in a suitable housing 32, and is coupled to the aforementioned electrically operated control means 28, 29
  • FIG. 2 schematically shows a circuit arrangement of the electrical system of a control device according to the invention.
  • the lamps 1' and 3' actuate photo-transistors 5 and 6, respectively, the latter being connected in series with a resistor 13 between the supply terminals 18a, 13b which are coupled to a suitable voltage source, not shown.
  • the current circuit of the photo-transistors 5, 6 controls an amplifier, illustrated as a transistor 9, the collector circuit of which includes the coil 11 of a solenoid, the armature 11a of which controls the action of the heat source, which in the instant example comprises burner 26, via electrically operated control means 28.
  • electrically operated control means 28 comprises an electrically operated valve means which cuts-off the supply of fuel from source 27 to burner 28 upon actuation of armature 11a.
  • the armature 11a upon its actuation, may close a contact switch that causes the electrical driving system, not shown, of means 28 to close the valve thereof.
  • control means 29 may be an electric-ally operated control valve that monitors the amount of fuel supplied by the source 27 to burner 26, as will be explained hereinafter.
  • the opening 1 is provided at the beginning and the opening 3 at the end of the face plate 30b, which represent respectively the lower and upper temperature ranges, approximately, of the indicator 39.
  • the electrically operated control valve 28 will be closed whenever the opaque member 4 is interposed between the photo-transistor 6 and opening 3 in such a manner that the light energy emanating from lamp 3 and intercepted by photo-transistor 6 is attenuated below the selected threshold level.
  • opening 1 is placed in such a position on plate 30b so as to coincide approximately with the minimum temperature that the high temperature part 20 may safely assume during the operation of the apparatus as, for example, the zero on null markings of the indicator 34].
  • opening 1 is in such a position that the pointer, or more properly the opaque member 4-, will intercept the light energy emanating therefrom on returning to its rest position, as for example when there is no signal present at the input of indicator 30 from the element 31.
  • defects may arise, for example, from an actual decrease in temperature of the heat transfer means itself, or may arise from a defect in the control device such as a short circuit or the like.
  • the position of opening 2 on plate 30b is selected as an intermediary one and so placed as to coincide with the normal operating temperature range of the cylinder part 20.
  • the emitter current thereof will be responsive to attenuations in the light energy emanating from lamp 2 by virtue of the movement of the opaque member 4 from its normal operating temperature of the cylinder part 20.
  • the collector current of transistor-amplifier 10 will also vary proportionately causing a corresponding movement in the armature 12a.
  • Electrically operated control valve means 29 which may include, for example, as a part thereof a fuel valve operated by an electric motor whose field excitation is controlled by a rheostat having a variable arm which is coupled to the armature 21a, in a manner well known to those skilled in the art, is adjusted thereby to control the amount of fuel required by the burner 26 to maintain cylinder part 20 at the normal operating temperature.
  • control means 28 becomes closed, provision is made for the clo sure of control means 29, as will be explained hereinafter.
  • the lamps 1', 2', 3' are serially connected across the negative supply terminal 18a via current limiting resistor 16 and coil 11.
  • transistor-amplifier 9 is cut off.
  • no current flows in the collector circuit of transistor 9 and lamps I, 3', 2' are extinguished causing electrically operated valve means 28 to remain in the closed position.
  • electrically operated valve means 28 would still remain closed.
  • electrically operating control means 29 may be so arranged to cause a similar closure therein, thus insuring against the possibility of any fuel from source 27 being supplied to burner 26.
  • a switch 8 is shunted across photo transducers 5, 6 and upon its closure, as for example after correction of the defect, causes a negative voltage to appear at the input of transistor-amplifier 9 sufiicient to overcome the cut ofi bias thereat.
  • transistor 9 conducts causing lamps l 2' 3 to become operative and thereby recycles the control device of this invention.
  • a hot-gas reciprocating apparatus comprising a plurality of cylinders
  • the use of the arrangement shown in FIG. 3 provides the extra advantage that when the fuel supply to a heat source of one or more of the cylinders is closed, the fuel supply to the remaining heat sources of the other cylinders is also interrupted.
  • a temperature responsive control circuit to control the action of a controllable system, said circuit comprising thermal-electrical transducer means to provide a signal proportional to the temperature sensed thereby, indicator means having a movable member responsive to said signal, a source of light, a pair of photosensitive transducer means having output means associated therewith coupled to said controllable system, each of the photosensitive transducer means of said pair being adapted for mutually exclusive light energy coupling relationship with said source, and an opaque member coupled to said movable member adapted to be disposed between said light source and a predetermined one of the photosensitive transducer means of said pair at temperatures below a given temperature range to stop said action and to be disposed between said light source and the other of the photosensitive transducer means of said pair at temperatures above said given temperature range to stop said action, said given temperature range having at least one predetermined temperature.
  • a temperature responsive control circuit according to claim 1 further comprising selector means to recycle said circuit means whenever said action is stopped.
  • a temperature responsive control circuit to control the action of a controllable system, said circuit comprising thermal-electrical transducer means to provide a signal proportional to the temperature sensed thereby, indicator means having a movable member responsive to said signal, a source of light, first and second photosensitive transducer means having output means associated therewith coupled to said controllable system, each of said first and second photosensitive transducer means being adapted for mutually exclusive light energy coupling relationship with said source, an opaque member coupled to said movable member and adapted to be disposed between said light source and a predetermined one of said first and second photosensitive transducer means at temperatures below a given temperature range to stop said action and to be disposed between said light source and the other of said first and second photosensitive transducer means at temperatures above said given temperature range to stop said action, and third photosensitive transducer means having output means associated therewith coupled to said controllable system, said third photosensitive transducer means being adapted for light energy coupling relationship with said source, said opaque member being further adapted to adjust the light
  • a temperature responsive control circuit according to claim 3 further comprising selector means to recycle said circuit means whenever said action is stopped.
  • a temperature responsive control circuit adapted to control the action of a controllable system with a plurality of other similarly constructed circuits, said controllable system having a plurality of temperature controllable portions, each of said circuits comprising thermal-electrical transducer means to provide a signal proportional to the temperature sensed thereby, indicator means having a movable member responsive to said signal, a source of light, a pair of photosensitive transducer means having output means associated therewith coupled to one of the temperature controllable portions of said controllable system, each of the photosensitive transducer means of said pair being adapted for mutually exclusive light energy coupling relationship with said source, an opaque member coupled to said movable member adapted to be disposed between said light source and a predetermined one of the photosensitive transducer means of said pair at temperatures below a given temperature range to stop said action at said one portion and to be disposed between said light source and the other of the photosensitive transducer means of said pair at temperatures above said given temperature range to stop said action at said one portion, :said
  • a temperature responsive control circuit according to claim 5 further comprising selector means to recycle said circuit means whenever said action is stopped.
  • a temperature responsive control circuit adapted to control the action of a controllable system with a plurality of other similarly constructed circuits, said controllable system having a plurality of temperature controllable portions, each of said circuits comprising thermal-electrical transducer means to provide a signal pro portional to the temperature sensed thereby, indicator means having a movable member responsive to said signal, a source of light, first and second photosensitive transducer means having output means associated therewith coupled to one of the temperature controllable portions of said controllable system, each of said first and second photosensitive transducer means being adapted for mutually exclusive light energy coupling relationship with said source, and an opaque member coupled to said movable member and adapted to be disposed between said light source and a predetermined one of said first and second photosensitive transducer means at temperatures below a given temperature range to stop said action at said one portion and to be disposed between said light source and the other of said first and second photosensitive transducer means at temperatures above said given temperature range to stop said action at said one portion, said given
  • a temperature responsive control circuit according to claim 7 further comprising selector means to recycle said circuit means whenever said action is stopped.
  • a temperature responsive control circuit to control the action of a heater system for a hot gas reciprocating apparatus having at least one cylinder, said circuit comprising thermal-electrical transducer means disposed in a predetermined spatial relationship with said apparatus to provide a signal proportional to the temperature sensed thereat, indicator means having a movable member responsive to said signal, a source of light, a pair of photosensitive transducer means having output means associated therewith coupled to said heater system, each of the photosensitive transducer means of said pair being adapted for mutually exclusive light energy coupling relationship with said source, and an opaque member coupled to said movable member adapted to be disposed between said light source and a predetermined one of the photosensitive transducer means of said pair at temperatures below a given temperature range to stop said action and to be disposed between said light source and the other of the photosensitive transducer means of said pair at temperatures above said given temperature range to stop said action, said given temperature range having at least one predetermined temperature.
  • a temperature responsive control circuit according to claim 9 further comprising selector means to recycle said circuit means whenever said action is stopped.
  • a temperature responsive control circuit to control the action of a heater system for a hot gas reciprocating apparatus having at least one cylinder, said circuit comprising thermal-electrical transducer means disposed in a predetermined spatial relationship with said apparatus to provide a signal proportional to the temperature sensed thereat, indicator means having a movable member responsive to said signal, a source of light, first and second photosensitive transducer means having output means associated therewith coupled to said heater system, each of said first and second photosensitive transducer means being adapted for mutually exclusive light energy coupling relationship with said source, an opaque member coupled to said movable member and adapted to be disposed between said light source and a predetermined one of said first and second photosensitive transducer means at temperatures below a given temperature range to stop said action and to be disposed between said light source and the other of said first and second photosensitive transducer means at temperatures above said given temperature range to stop said action, and third photosensitive transducer means having output means associated therewith coupled to said heater system, said third photosensitive transducer means being adapted for
  • a temperature responsive control circuit according to claim 11 further comprising selector means to recycle said circuit means whenever said action is stopped.
  • a temperature responsive control circuit adapted to control with a plurality of other simlarly constructed circuits the action of a heater system for a hot gas reciprocating apparatus having a plurality of cylinders, said heater system having a plurality of heater portions to heat said cylinders, each of said circuits comprising thermaleiectrical transducer means disposed in a predetermined spatial relationship with one of said plurality of cylinders to provide a signal proportional to the temperature sensed thereat, indicator means having a movable member responsive to said signal, a source of light, a pair of photosensitive transducer means having output means associated therewith coupled to the respective heater portion of said heater system that heats said one cylinder, each of the photosensitive transducer means of said pair being adapted for mutually exclusive light energy coupling relationship with said source, an opaque member coupled to said movable member adapted to be disposed between said light source and a predetermined one of the photosensitive transducer means of said pair at temperatures below a given temperature range to stop said action at said respective heater
  • a temperature responsive control circuit according to claim 13 further comprising selector means to recycle said circuit means whenever said action is stopped.
  • a temperature responsive control circuit adapted to control with a plurality of other similarly constructed circuits the action of a heater system for a hot gas reciprocating apparatus having a plurality of cylinders, said heater system having a plurality of heater portions to heat said cylinder, each of said circuits comprising thermalelectrical transducer means disposed in a predetermined spatial relationship with one of said plurality of cylinders to provide a signal proportional to the temperature sensed thereat, indicator means having a movable member responsive to said signal, a source of light, first and second photosensitive transducer means having output means associated therewith coupled to the respective heater portion of said heater system that heats said one cylinder, each of said first and second photosensitive transducer means being adapted for mutually exclusive light energy coupling relationship with said source, an opaque member coupled to said movable member adapted to be disposed between said light source and a predetermined one of said first and second photosensitive transducer means at temperatures below a given temperature range to stop said action at said respective heater portion and to be disposed between said light source

Landscapes

  • Engineering & Computer Science (AREA)
  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Automation & Control Theory (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Ignition Installations For Internal Combustion Engines (AREA)
  • Details Of Measuring Devices (AREA)
  • Control Of Combustion (AREA)
US3828A 1959-02-11 1960-01-21 Device for protecting thermo-dynamic engines Expired - Lifetime US3050933A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
NL236024 1959-02-11

Publications (1)

Publication Number Publication Date
US3050933A true US3050933A (en) 1962-08-28

Family

ID=19751566

Family Applications (1)

Application Number Title Priority Date Filing Date
US3828A Expired - Lifetime US3050933A (en) 1959-02-11 1960-01-21 Device for protecting thermo-dynamic engines

Country Status (8)

Country Link
US (1) US3050933A (enrdf_load_stackoverflow)
AT (1) AT217791B (enrdf_load_stackoverflow)
BE (1) BE587427A (enrdf_load_stackoverflow)
CH (1) CH387383A (enrdf_load_stackoverflow)
DK (1) DK109698C (enrdf_load_stackoverflow)
FR (1) FR1247734A (enrdf_load_stackoverflow)
GB (1) GB934634A (enrdf_load_stackoverflow)
NL (2) NL102934C (enrdf_load_stackoverflow)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3393671A (en) * 1966-08-22 1968-07-23 Honeywell Inc Control system for water heaters
US3509719A (en) * 1968-06-10 1970-05-05 Donald A Kelly Stirling engine power system
US3906728A (en) * 1974-10-04 1975-09-23 Ford Motor Co Auxiliary water pump

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE2922603C2 (de) * 1979-06-02 1985-12-19 M.A.N. Maschinenfabrik Augsburg-Nürnberg AG, 8900 Augsburg Mehrzylindriger Heißgasmotor
DE3914264C1 (enrdf_load_stackoverflow) * 1989-04-29 1990-09-13 Daimler-Benz Aktiengesellschaft, 7000 Stuttgart, De

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2340605A (en) * 1941-03-08 1944-02-01 Bristol Company Protective device
US2664698A (en) * 1949-09-08 1954-01-05 Hartford Nat Bank & Trust Co Hot-gas reciprocating engine with means for augmenting the pressure medium and supplying combustion air
US2765986A (en) * 1955-07-11 1956-10-09 Cybertronic Corp Of America Photo-transistor control system
US2894368A (en) * 1946-02-06 1959-07-14 Philips Corp Hot-gas engine comprising more than one device for the supply of heat

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2340605A (en) * 1941-03-08 1944-02-01 Bristol Company Protective device
US2894368A (en) * 1946-02-06 1959-07-14 Philips Corp Hot-gas engine comprising more than one device for the supply of heat
US2664698A (en) * 1949-09-08 1954-01-05 Hartford Nat Bank & Trust Co Hot-gas reciprocating engine with means for augmenting the pressure medium and supplying combustion air
US2765986A (en) * 1955-07-11 1956-10-09 Cybertronic Corp Of America Photo-transistor control system

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3393671A (en) * 1966-08-22 1968-07-23 Honeywell Inc Control system for water heaters
US3509719A (en) * 1968-06-10 1970-05-05 Donald A Kelly Stirling engine power system
US3906728A (en) * 1974-10-04 1975-09-23 Ford Motor Co Auxiliary water pump

Also Published As

Publication number Publication date
DK109698C (da) 1968-06-10
CH387383A (de) 1965-01-31
BE587427A (fr) 1960-08-09
GB934634A (en) 1963-08-21
NL236024A (enrdf_load_stackoverflow) 1900-01-01
AT217791B (de) 1961-10-25
NL102934C (enrdf_load_stackoverflow) 1900-01-01
FR1247734A (fr) 1960-12-02

Similar Documents

Publication Publication Date Title
US3817453A (en) Solid state thermostat with droop compensation
US3272187A (en) Fuel injection systems for internal combustion engines
US2901740A (en) Electrical network automatically responsive to a change in condition
US2403917A (en) Control apparatus
US4288854A (en) Bi-modal temperature controller
US3050933A (en) Device for protecting thermo-dynamic engines
US2417097A (en) Variable inductance for telemetering systems
CA2031876A1 (en) Electronic control system for an oven
US3107285A (en) Temperature control system
US3815668A (en) Comfort control system and components thereof
US2958008A (en) Control circuit
US3597139A (en) Dual coil gas burner control circuit
US3320407A (en) Solid state temperature control
US3500898A (en) Control system for multi-stage heating and cooling system
US3594546A (en) Air temperature control apparatus
US2919858A (en) Flow control device
US2713130A (en) Control circuit
GB605093A (en) Improvements relating to temperature indicating and control systems
US3449599A (en) Temperature control circuit
US3623545A (en) Automatic changeover heating-cooling system having single semiconductor anticipator for both heating and cooling
US2876951A (en) Fluid pressure operated control devices
US3068338A (en) Thermostatically controlled circuits
US4151862A (en) Multiple-mode fluid-flow control valve arrangement
GB1578198A (en) Gas leakdetecting apparatus
US3609072A (en) Electric igniter system