CA1090443A - Time controlled thermostat with battery operated timer - Google Patents
Time controlled thermostat with battery operated timerInfo
- Publication number
- CA1090443A CA1090443A CA264,907A CA264907A CA1090443A CA 1090443 A CA1090443 A CA 1090443A CA 264907 A CA264907 A CA 264907A CA 1090443 A CA1090443 A CA 1090443A
- Authority
- CA
- Canada
- Prior art keywords
- battery
- control
- temperature
- wires
- circuit
- 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
Links
Classifications
-
- 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
- G05D23/275—Control of temperature characterised by the use of electric means with sensing element expanding, contracting, or fusing in response to changes 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
- G05D23/1902—Control of temperature characterised by the use of electric means characterised by the use of a variable reference value
- G05D23/1904—Control of temperature characterised by the use of electric means characterised by the use of a variable reference value variable in time
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02J—CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
- H02J7/00—Circuit arrangements for charging or depolarising batteries or for supplying loads from batteries
- H02J7/02—Circuit arrangements for charging or depolarising batteries or for supplying loads from batteries for charging batteries from ac mains by converters
Landscapes
- Engineering & Computer Science (AREA)
- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Automation & Control Theory (AREA)
- Power Engineering (AREA)
- Control Of Temperature (AREA)
- Air Conditioning Control Device (AREA)
- Charge And Discharge Circuits For Batteries Or The Like (AREA)
Abstract
ABSTRACT OF THE DISCLOSURE
A two wire rechargeable battery powered electric time controlled thermostat apparatus adapted to be connected by two wires to a source of alternating current voltage and control apparatus for controlling the supply of temperature condition medium to the space wherein the thermostat is located with a rectifying circuit means in the thermostat ap-paratus for recharging the battery from the source over the two wires.
A two wire rechargeable battery powered electric time controlled thermostat apparatus adapted to be connected by two wires to a source of alternating current voltage and control apparatus for controlling the supply of temperature condition medium to the space wherein the thermostat is located with a rectifying circuit means in the thermostat ap-paratus for recharging the battery from the source over the two wires.
Description
TIME CO~TROLLED THERMOSTAT
BACKGROU~D A~D SUMMARY OF THE INVE~TION ..
Time controlled or electric clock thermostats have for many years required at least three wires to connect the .
thermostat to a remote source of power and a control apparatus for a system for controlling the supply of temperature condi- ~
tion medium to the space wherein the thermostat is located. ¦:
In the modification of original construction in which two wires are required for a simple thermostat, considerable dif-ficulty is experienced when the system is to be converted for .
use with a clock thermostat as extra wires are pulled through the wall.
To overcome the necessity of pulling extra wires : :~
to power a clock thermostat over the same two wires on which the control apparatus is controlled, various expensive schemes have been provided such as in the United States Clifford L. ~ ~ :
i Nelson et al Patent 3,620,448, issued ~ovember 16, 1971, and : the United States Balthasar H. Pinckaers Patent 3,599,863, issued August 17, 1971, wherein the clock motor is powered :
over the two wires and a signal of a diferent power factor or waveform is superimposed over the two wires for controlling : the remote control apparatus. :
Obviously, with the advent of lower power, extremely accurate battery driven time controlled units or clocks, such ~
as the crystal oscillator type now available, the use of such ¦
a motor for powering an electric clock thermostat has been pro- ~
posed, however, because of the torque requirement that the ~ :.
motor must have to do the added work of directly moving a : mechanism which changes the temperature maintained in the space, power required from such a battery is large enough that ,, , .
443 : ~ ~
that frequent changing or recharging of the battery must be accomplished. .
The present invention provides a rechargeable battery powered electric clock thermostat for use in a system for controlling remote control ~-apparatus over two wires and for connecting the battery through a charging .
circuit over the same two wires to a remote power source; so that, an electric clock thermostat can be used to replace a simple thermostat without the expense of additional wires for providing a control circuit for the -thermostat and an energization circuit for the clock motor.
Thus, in accordance with one broad aspect of the invention, there -~
is provided an improvement in a two wire electric clock temperature control -~
wherein a rechargeable battery powered clock thermostat unit, comprising a continuously energized clock motor and a thermostat means, is adapted to be ; :~
located in a space and is adapted to be connected by two wires to a remote second unit comprising an alternating current power source and a control ~-apparatus for controlling the operation of temperature conditioning apparatus ;-~
supplying temperature conditioned medium to the space, the improvement . :~
comprising rectifying means mounted in the thermostat unit, and circuit connecting means adapted for connecting sald power source through said two .~ ~
. wires and said rectifying means to the rechargeable battery to charge said ~-~:: 20 battery. ;:
According to another broad aspect of the invention there is pro~
vided, in a two wire rechargeable battery powered electric time controlled temperature control adapted to be connected by two wires to a source of voltage and control apparatus for controlling the temperature of temperature :~
: conditioned medium delivered to a space wherein the control is to be located ~:
comprising, temperature responsive control means, electric time controlled means connected to said temperature respons~ve control means to change the ;~
: control ~cemperature to be maintained by said temperature responsive control : means during different time periods, rechargeable battery means electrically connected to energize said electric time controlled means, and circuit means adapted to connect said battery meane to said two wires to charge said battery means.
, ~ -2-;~ . , , . , , - . ::.
The embodiments of the present invention are shown in the following figures of which Figure 1 is a schematic showing of the connection of a battery powered time controlled thermostat apparatus to a remote source of power and control apparatus for controlling the supply of temperature condition medium to the space in which the thermostat is mounted, and .
Figure 2 is a first embodiment of the present invention, and ~ .
Figure 3 is another embodiment of the invention, and ~-Figure 4 is still another embodiment of the invention. ;~
DESCRIPTION OF THE INVENTION ::-. ~ ., Referring to Figure 1, the temperature in a space 10 is controlled :~
by a temperature responsive device or thermostat apparatus 11 connected by :
two wires 12 and 13 to a remote control panel 14. Panel 14 has a source of ~ :
power 15 and an output circuit 20 connected to a control apparatus or valve 21 of a system for controlling the supply of fuel or gas to a tempera-,~ :
. -'~
~- .
' '';:
-2a-., ,~,.,~ . : , . ....... .
,. . , . -lOg¢443 ture conditioning apparatus or furnace 22 for temperature con-ditioning or heating medium or air being circulated through t~e space 10 through duct 23 by a fan 24.
Thermostat apparatus 11 has a temperature responsi~e control means or mechanism for maintaining one of two different levels of temperature or bimetal operated switch means 25, such as a clock thermostat disclosed in the United States Carl. G ¦ `
Kronmiller Patent 2,558,617, issued June 26, 1951, comprising ¦
a bimetal element which controls a switch to complete a circuit to provide power to remote control apaaratus 21. The tempera-ture control of the thermostat apparatus 11 is adjusted by a time controlled mechanism or clock driven by a motor 30 to selectively adjust the control temperature maintained during different time periods to typically maintain a daytime tempera-ture of 72 and at 10:00 p.m. to change the control point of the thermostat to maintain a nighttime temperature of 65 until morning when the daytime temperature is again selected. Any one particular type of thermostat apparatus 11 for 9electively-maintaining different controlled temperatures in a space 10 ~: ~ :
~: ao is not required for use in the present invention. Motor 30 is a rechargeable battery powered motor connected to a battery 32 ~
whlch is recharged over the same two wires 12 and 13 by;a charging ` circuit to be described.
, ~ Referring to Figure 2, thermostat lI is shown con-.', `' 25 nected to panel 14 ~or controlling control apparatus or valve ¦
21. Temperature responslve switch 25 is adapted to connect ¦
the control circuit to the source of power 15 to ener~ize valve J
21. Circuit 31 is an adjustable circuit or energizing con-ventional anticipation heater 26 thermally connected to tem-perature responsive switch means 25. The voltage to heater 26, can be adjusted by selectively positioning input tap 27 4~3 to regulate the control of thermostat switch 25. ~otor 30 is connected to rechargeable battery 32 for driving the time con-trolled mechanism of thermostat 11. One terminal of battery 32 is connected by conductor 33 to a diode 34 to wire 12 and.
the other terminal of the battery is connected by conductor 35 r through a limiting resistor 40 to the other wire 13 for pro-viding a charging circuit to battery 32.
The battery is charged from source 15 all the time.
By means of a limiting resistor 40, the current drain from the.
source for the recharging of the battery is limited below that L
required to operate valve 21. The valve 21 will not operate when the thermostat is not calling for heat.
The embodiment of the invention shown in Figure 3 comprises the thermostat 11 connected over wires 12 and 13 to panel 14 with the source of power 15 and valve 21. The ther-~
mostat switch 25 is connected in parallel with motor 30 so that when the switch is open current is suppl.ied through the diode 34 to recharge battery 32. A limiting resistor ~40 is connecte to limit the current to prevent the operation of valve 21.
. , The embodiment of the invention as shown in Figure 4 has a thermostat 11 connected over two wires 12 and 13 to a remote panel 14 having a source of power 15 and a valve 21. ~ ~:
Rectifying means 34 for supplying power to recharge battery 32 .
comprises a conventional diode bridge for providing a recti- ¦
fying current during both cycles of the alternating current ¦ ~
voltage of source 15. The current drain from the source is I .:
limited by limiting resistor 40. !
BACKGROU~D A~D SUMMARY OF THE INVE~TION ..
Time controlled or electric clock thermostats have for many years required at least three wires to connect the .
thermostat to a remote source of power and a control apparatus for a system for controlling the supply of temperature condi- ~
tion medium to the space wherein the thermostat is located. ¦:
In the modification of original construction in which two wires are required for a simple thermostat, considerable dif-ficulty is experienced when the system is to be converted for .
use with a clock thermostat as extra wires are pulled through the wall.
To overcome the necessity of pulling extra wires : :~
to power a clock thermostat over the same two wires on which the control apparatus is controlled, various expensive schemes have been provided such as in the United States Clifford L. ~ ~ :
i Nelson et al Patent 3,620,448, issued ~ovember 16, 1971, and : the United States Balthasar H. Pinckaers Patent 3,599,863, issued August 17, 1971, wherein the clock motor is powered :
over the two wires and a signal of a diferent power factor or waveform is superimposed over the two wires for controlling : the remote control apparatus. :
Obviously, with the advent of lower power, extremely accurate battery driven time controlled units or clocks, such ~
as the crystal oscillator type now available, the use of such ¦
a motor for powering an electric clock thermostat has been pro- ~
posed, however, because of the torque requirement that the ~ :.
motor must have to do the added work of directly moving a : mechanism which changes the temperature maintained in the space, power required from such a battery is large enough that ,, , .
443 : ~ ~
that frequent changing or recharging of the battery must be accomplished. .
The present invention provides a rechargeable battery powered electric clock thermostat for use in a system for controlling remote control ~-apparatus over two wires and for connecting the battery through a charging .
circuit over the same two wires to a remote power source; so that, an electric clock thermostat can be used to replace a simple thermostat without the expense of additional wires for providing a control circuit for the -thermostat and an energization circuit for the clock motor.
Thus, in accordance with one broad aspect of the invention, there -~
is provided an improvement in a two wire electric clock temperature control -~
wherein a rechargeable battery powered clock thermostat unit, comprising a continuously energized clock motor and a thermostat means, is adapted to be ; :~
located in a space and is adapted to be connected by two wires to a remote second unit comprising an alternating current power source and a control ~-apparatus for controlling the operation of temperature conditioning apparatus ;-~
supplying temperature conditioned medium to the space, the improvement . :~
comprising rectifying means mounted in the thermostat unit, and circuit connecting means adapted for connecting sald power source through said two .~ ~
. wires and said rectifying means to the rechargeable battery to charge said ~-~:: 20 battery. ;:
According to another broad aspect of the invention there is pro~
vided, in a two wire rechargeable battery powered electric time controlled temperature control adapted to be connected by two wires to a source of voltage and control apparatus for controlling the temperature of temperature :~
: conditioned medium delivered to a space wherein the control is to be located ~:
comprising, temperature responsive control means, electric time controlled means connected to said temperature respons~ve control means to change the ;~
: control ~cemperature to be maintained by said temperature responsive control : means during different time periods, rechargeable battery means electrically connected to energize said electric time controlled means, and circuit means adapted to connect said battery meane to said two wires to charge said battery means.
, ~ -2-;~ . , , . , , - . ::.
The embodiments of the present invention are shown in the following figures of which Figure 1 is a schematic showing of the connection of a battery powered time controlled thermostat apparatus to a remote source of power and control apparatus for controlling the supply of temperature condition medium to the space in which the thermostat is mounted, and .
Figure 2 is a first embodiment of the present invention, and ~ .
Figure 3 is another embodiment of the invention, and ~-Figure 4 is still another embodiment of the invention. ;~
DESCRIPTION OF THE INVENTION ::-. ~ ., Referring to Figure 1, the temperature in a space 10 is controlled :~
by a temperature responsive device or thermostat apparatus 11 connected by :
two wires 12 and 13 to a remote control panel 14. Panel 14 has a source of ~ :
power 15 and an output circuit 20 connected to a control apparatus or valve 21 of a system for controlling the supply of fuel or gas to a tempera-,~ :
. -'~
~- .
' '';:
-2a-., ,~,.,~ . : , . ....... .
,. . , . -lOg¢443 ture conditioning apparatus or furnace 22 for temperature con-ditioning or heating medium or air being circulated through t~e space 10 through duct 23 by a fan 24.
Thermostat apparatus 11 has a temperature responsi~e control means or mechanism for maintaining one of two different levels of temperature or bimetal operated switch means 25, such as a clock thermostat disclosed in the United States Carl. G ¦ `
Kronmiller Patent 2,558,617, issued June 26, 1951, comprising ¦
a bimetal element which controls a switch to complete a circuit to provide power to remote control apaaratus 21. The tempera-ture control of the thermostat apparatus 11 is adjusted by a time controlled mechanism or clock driven by a motor 30 to selectively adjust the control temperature maintained during different time periods to typically maintain a daytime tempera-ture of 72 and at 10:00 p.m. to change the control point of the thermostat to maintain a nighttime temperature of 65 until morning when the daytime temperature is again selected. Any one particular type of thermostat apparatus 11 for 9electively-maintaining different controlled temperatures in a space 10 ~: ~ :
~: ao is not required for use in the present invention. Motor 30 is a rechargeable battery powered motor connected to a battery 32 ~
whlch is recharged over the same two wires 12 and 13 by;a charging ` circuit to be described.
, ~ Referring to Figure 2, thermostat lI is shown con-.', `' 25 nected to panel 14 ~or controlling control apparatus or valve ¦
21. Temperature responslve switch 25 is adapted to connect ¦
the control circuit to the source of power 15 to ener~ize valve J
21. Circuit 31 is an adjustable circuit or energizing con-ventional anticipation heater 26 thermally connected to tem-perature responsive switch means 25. The voltage to heater 26, can be adjusted by selectively positioning input tap 27 4~3 to regulate the control of thermostat switch 25. ~otor 30 is connected to rechargeable battery 32 for driving the time con-trolled mechanism of thermostat 11. One terminal of battery 32 is connected by conductor 33 to a diode 34 to wire 12 and.
the other terminal of the battery is connected by conductor 35 r through a limiting resistor 40 to the other wire 13 for pro-viding a charging circuit to battery 32.
The battery is charged from source 15 all the time.
By means of a limiting resistor 40, the current drain from the.
source for the recharging of the battery is limited below that L
required to operate valve 21. The valve 21 will not operate when the thermostat is not calling for heat.
The embodiment of the invention shown in Figure 3 comprises the thermostat 11 connected over wires 12 and 13 to panel 14 with the source of power 15 and valve 21. The ther-~
mostat switch 25 is connected in parallel with motor 30 so that when the switch is open current is suppl.ied through the diode 34 to recharge battery 32. A limiting resistor ~40 is connecte to limit the current to prevent the operation of valve 21.
. , The embodiment of the invention as shown in Figure 4 has a thermostat 11 connected over two wires 12 and 13 to a remote panel 14 having a source of power 15 and a valve 21. ~ ~:
Rectifying means 34 for supplying power to recharge battery 32 .
comprises a conventional diode bridge for providing a recti- ¦
fying current during both cycles of the alternating current ¦ ~
voltage of source 15. The current drain from the source is I .:
limited by limiting resistor 40. !
Claims (11)
1. An improvement in a two wire electric clock tempera-ture control wherein a rechargeable battery powered clock ther-mostat unit, comprising a continuously energized clock motor and a thermostat means, is adapted to be located in a space and is adapted to be connected by two wires to a remote second unit comprising an alternating current power source and a con-trol apparatus for controlling the operation of temperature con-ditioning apparatus supplying temperature conditioned medium to the space, the improvement comprising rectifying means mounted in the thermostat unit, and circuit connecting means adapted for connecting said power source through said two wires and said rectifying means to the rechargeable battery to charge said battery.
2. The invention of claim 1 comprising, current limiting means connected in said circuit connecting means to limit the current to said rectifying means to prevent operation of the control apparatus by a current flow to said battery during the charging of said battery.
3. The invention of claim 1 wherein said rectifying means comprises a diode bridge cir-cuit to provide charging current to said battery on both cycles of said alternating current power source.
4. In a two wire rechargeable battery powered electric time controlled temperature control adapted to be connected by two wires to a source of voltage and control apparatus for con-
4. In a two wire rechargeable battery powered electric time controlled temperature control adapted to be connected by two wires to a source of voltage and control apparatus for con-
Claim 4 continued trolling the temperature of temperature conditioned medium de-livered to a space wherein the control is to be located com-prising, temperature responsive control means, electric time controlled means connected to said temperature responsive control means to change the control temperature to be maintained by said temperature responsive control means during different time periods, rechargeable battery means electrically connected to energize said electric time controlled means, and circuit means adapted to connect said battery means to said two wires to charge said battery means.
5. The invention of claim 4 wherein said source is an alternating current voltage source, and said circuit means comprises rectifying means to convert power from said source to a unidirectional current for charging said battery.
6. The invention of claim 5 comprising:
current limiting means connected in said circuit means to limit the power drawn over said two wires for charging said battery to prevent operation of the control apparatus when the temperature control is not calling for temperature conditioning.
current limiting means connected in said circuit means to limit the power drawn over said two wires for charging said battery to prevent operation of the control apparatus when the temperature control is not calling for temperature conditioning.
7. The invention of claim 4 wherein;
said circuit means is adapted to connect said battery to said source all the time.
8. The invention of claim 7 comprising:
said circuit means is adapted to connect said battery to said source all the time.
8. The invention of claim 7 comprising:
Claim 8 continued current limiting means connected in said circuit means to limit the current drawn over said two wires to charge said battery.
9. A unitary electrical time variable set point thermostatic device adapted for use in a two wire control circuit of a heating system without additional wiring comprising:
a. thermostatic control means having temperature set points and responsive to ambient temperature for opening and closing a thermostatic switch therein, said switch energizing said control circuit to operate said heating system when said ambient temperature varies a determined amount from said set point;
b. electric timer means for cyclically changing said set point of said thermostatic means from an initial value at a selected time to a second value and at a selected time thereafter restor-ing said set point to said initial value;
c. electrical energy storage means for continuously energizing said timer means independent of said two wire control circuit, said electrical energy storage means comprising a battery con-nected to said electric timer means; and d. means connected in said control circuit for charging said battery during periods when said switch of said thermostatic control means is open.
a. thermostatic control means having temperature set points and responsive to ambient temperature for opening and closing a thermostatic switch therein, said switch energizing said control circuit to operate said heating system when said ambient temperature varies a determined amount from said set point;
b. electric timer means for cyclically changing said set point of said thermostatic means from an initial value at a selected time to a second value and at a selected time thereafter restor-ing said set point to said initial value;
c. electrical energy storage means for continuously energizing said timer means independent of said two wire control circuit, said electrical energy storage means comprising a battery con-nected to said electric timer means; and d. means connected in said control circuit for charging said battery during periods when said switch of said thermostatic control means is open.
10. A device as defined in claim 9 wherein said electic timer means includes an electric motor connected to said thermostatic control means for mechanically changing said set point of said thermostatic control means at said selected times.
11. A device as defined in claim 9 wherein said charging means comprises:
a. a diode, and b. a charging resistor series connected with said diode and said battery, said diode blocking current flow from said battery except through said motor when said switch of said thermostatic control means is closed.
a. a diode, and b. a charging resistor series connected with said diode and said battery, said diode blocking current flow from said battery except through said motor when said switch of said thermostatic control means is closed.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CA358,700A CA1107843A (en) | 1975-12-10 | 1980-08-20 | Time controlled thermostat |
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| US63952375A | 1975-12-10 | 1975-12-10 | |
| US639,523 | 1975-12-10 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CA1090443A true CA1090443A (en) | 1980-11-25 |
Family
ID=24564451
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CA264,907A Expired CA1090443A (en) | 1975-12-10 | 1976-11-04 | Time controlled thermostat with battery operated timer |
Country Status (8)
| Country | Link |
|---|---|
| JP (1) | JPS5833458B2 (en) |
| BE (1) | BE849175A (en) |
| CA (1) | CA1090443A (en) |
| FR (1) | FR2334995A1 (en) |
| GB (1) | GB1548440A (en) |
| LU (1) | LU76356A1 (en) |
| NL (1) | NL187251B (en) |
| SE (1) | SE7613853L (en) |
Families Citing this family (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5462641A (en) * | 1977-10-11 | 1979-05-19 | Robertshaw Controls Co | Thermostat |
| FR2449922A1 (en) * | 1978-11-29 | 1980-09-19 | Vedette Fabrique Horlogerie | Ambient thermostat combined with time switch - employs two wire switching circuit to supply power for timer battery |
| FR2524127A1 (en) * | 1982-03-29 | 1983-09-30 | Delta Dore | Control and data acquisition signal transmission heating installation - uses current modulation to transmit transducer data and voltage modulation to transmit control signals |
| JPS58185570U (en) * | 1982-06-02 | 1983-12-09 | 株式会社吉野工業所 | foldable assembly container |
| JPS58179757A (en) * | 1983-03-18 | 1983-10-21 | Hitachi Ltd | Power source retaining circuit of air conditioner |
| JPS59181010U (en) * | 1983-05-19 | 1984-12-03 | 大日本印刷株式会社 | hexagonal box |
| GB2173920B (en) * | 1985-04-17 | 1989-06-28 | John David Statham | Improvements in and relating to heating systems |
Family Cites Families (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US360448A (en) * | 1887-04-05 | Electric annunciator | ||
| US3214670A (en) * | 1961-10-16 | 1965-10-26 | Schaf Jack | Apparatus for simultaneously charging a battery and operating a timer motor |
| JPS4032114Y1 (en) * | 1964-11-05 | 1965-11-10 | ||
| US3599863A (en) * | 1969-09-08 | 1971-08-17 | Honeywell Inc | Electric clock thermostat having phase responsive control apparatus |
| DE7007071U (en) * | 1970-02-26 | 1970-05-21 | Viessmann Hans | REMOTE CONTROL UNIT OR ROOM THERMOSTAT. |
| JPS4848100U (en) * | 1971-10-09 | 1973-06-23 |
-
1976
- 1976-11-04 CA CA264,907A patent/CA1090443A/en not_active Expired
- 1976-11-23 GB GB48697/76A patent/GB1548440A/en not_active Expired
- 1976-12-03 NL NLAANVRAGE7613512,A patent/NL187251B/en not_active Application Discontinuation
- 1976-12-08 BE BE173056A patent/BE849175A/en not_active IP Right Cessation
- 1976-12-09 SE SE7613853A patent/SE7613853L/en unknown
- 1976-12-09 FR FR7637134A patent/FR2334995A1/en not_active Withdrawn
- 1976-12-09 LU LU76356A patent/LU76356A1/xx unknown
- 1976-12-10 JP JP51147855A patent/JPS5833458B2/en not_active Expired
Also Published As
| Publication number | Publication date |
|---|---|
| SE7613853L (en) | 1977-06-11 |
| NL7613512A (en) | 1977-06-14 |
| GB1548440A (en) | 1979-07-18 |
| FR2334995A1 (en) | 1977-07-08 |
| DE2655521A1 (en) | 1977-06-16 |
| JPS5833458B2 (en) | 1983-07-20 |
| DE2655521C2 (en) | 1983-06-16 |
| BE849175A (en) | 1977-04-01 |
| NL187251B (en) | 1991-02-18 |
| LU76356A1 (en) | 1977-06-08 |
| JPS5281946A (en) | 1977-07-08 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| US4174807A (en) | Autocycling control circuit for heating and/or air conditioning systems | |
| US4078720A (en) | Time variable thermostat | |
| US3948441A (en) | Time variable thermostat | |
| US4191328A (en) | Integral thermostat-digital clock unit | |
| US4293027A (en) | Control system for heating and cooling units | |
| US4199023A (en) | Heat demand regulator | |
| US4447712A (en) | Heating system | |
| EP0072442B1 (en) | Method and apparatus for proven demand air conditioning control | |
| US4319711A (en) | Wall thermostat and the like | |
| US4671457A (en) | Method and apparatus for controlling room temperature | |
| US4703795A (en) | Control system to delay the operation of a refrigeration heat pump apparatus after the operation of a furnace is terminated | |
| US4908498A (en) | Control for delivery of power to heating elements | |
| CA1090443A (en) | Time controlled thermostat with battery operated timer | |
| US3324672A (en) | Electrically controlled conditioning system | |
| US4907737A (en) | Electronic control system for a gas-fired/hot air furnace with induced draft blower | |
| US4423765A (en) | Apparatus for reducing heater and air conditioning energy consumption | |
| US4485966A (en) | Pulsation device for a heating or cooling unit | |
| CA1114042A (en) | Logic controlled digital wall thermostat | |
| US3983928A (en) | Dual temperature thermostatic controller | |
| US4635845A (en) | Time controlled thermostat | |
| GR3020128T3 (en) | Heating device and its control. | |
| US4197992A (en) | Thermostat control device | |
| CA1107843A (en) | Time controlled thermostat | |
| US4014499A (en) | Temperature control apparatus | |
| GB2173920A (en) | Heating controller |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| MKEX | Expiry |