US3690548A - Air distribution control - Google Patents
Air distribution control Download PDFInfo
- Publication number
- US3690548A US3690548A US124732A US3690548DA US3690548A US 3690548 A US3690548 A US 3690548A US 124732 A US124732 A US 124732A US 3690548D A US3690548D A US 3690548DA US 3690548 A US3690548 A US 3690548A
- Authority
- US
- United States
- Prior art keywords
- air
- temperature
- damper
- zone
- switch
- 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
Links
Images
Classifications
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F24—HEATING; RANGES; VENTILATING
- F24F—AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
- F24F11/00—Control or safety arrangements
- F24F11/70—Control systems characterised by their outputs; Constructional details thereof
- F24F11/72—Control systems characterised by their outputs; Constructional details thereof for controlling the supply of treated air, e.g. its pressure
- F24F11/74—Control systems characterised by their outputs; Constructional details thereof for controlling the supply of treated air, e.g. its pressure for controlling air flow rate or air velocity
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F24—HEATING; RANGES; VENTILATING
- F24F—AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
- F24F11/00—Control or safety arrangements
- F24F11/70—Control systems characterised by their outputs; Constructional details thereof
- F24F11/72—Control systems characterised by their outputs; Constructional details thereof for controlling the supply of treated air, e.g. its pressure
- F24F11/74—Control systems characterised by their outputs; Constructional details thereof for controlling the supply of treated air, e.g. its pressure for controlling air flow rate or air velocity
- F24F11/76—Control systems characterised by their outputs; Constructional details thereof for controlling the supply of treated air, e.g. its pressure for controlling air flow rate or air velocity by means responsive to temperature, e.g. bimetal springs
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F24—HEATING; RANGES; VENTILATING
- F24F—AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
- F24F2110/00—Control inputs relating to air properties
- F24F2110/30—Velocity
Definitions
- This invention relates to conditioned air distribution systems of the type wherein air which has been conditioned at a central source is distributed to a plurality of zones. These systems may operate in various manners.
- One type of system furnishes air at constant volume, the temperature of the air being varied in accordance with the demand from the conditioned space.
- Another system provides air at constant temperature,. and the volume of air delivered to a zone is varied in accordance with zone demands.
- variable air volume system offers many advantages which flow from requiring only one source of conditioned air at constant temperature. Ductwork can be kept relatively simple, and control valves generally do not have to be duplicated as may be the case in a dual-duct, dual-air source system.
- the variable air volume system lends itself particularly well to a structure with a more or less consistent seasonal requirement for either heating or cooling, for example, the interior portions of an office building wherein the heat provided by lighting and occupants is sufficient to meet or exceed heating requirements, and a consistent requirement for cooling exists.
- such a flow limiting device is normally configured to receive cooled air at all times or heated air at all times, depending upon the type of building in which the system is installed, the prevailing climatalogical conditions, and the like.
- some installations may require the capability for seasonal changeover wherein the system must be capable of delivering either heated or cooled air on signal.
- a still further object is to provide a device and method wherein air flow volume normally controlled thermostatically can also be controlled in response to system velocity pressure.
- a further object is to provide an additional switching means in the flow limiting circuit to accomplish changeover from cooling to heating and vice versa.
- the present invention has particular applicability to air distribution systems wherein air is delivered at substantially constant temperature in varying amounts to a plurality of zones.
- the desired temperature in each zone may be adjusted by varying the volume of conditioned air admitted to the'zone, which volume may be regulated by a thermostat.
- the volume of conditioned air admitted into the zone may be regulated by a single damper in the outlet box for that zone.
- the damper is driven further open. This action may continue in response to the thermostatic signal until the damper is sufficiently open that the air flow exceeds the design limitations. Should this occur, a pressure responsive means acting upon a measured differential pressure overrides the thermostatic control and drives the damper toward a closed position.
- the pressure responsive means is taken out of the control circuit and air flow control switches back to the temperature responsive thermostat.
- an additional temperature sensor and switching means may be provided to reverse the effects of the thermostatic control.
- FIG. 1 is a schematic view of an air terminal unit with related control circuitry
- FIG. 2 is a circuit diagram of the circuit of FIG. 1 including a seasonal switchover means
- FIG. 3 is a control circuit diagram illustrating another embodiment of the circuit shown in FIG. 1.
- an air terminal or outlet box is shown generally at 10, having an air inlet portion 11 and an air outlet portion 12.
- Inlet ll communicates with a source of air, indicated by the arrow therein, and outlet 12 communicates with a zone to receive conditioned air from terminal box 10 through outlet portion 12.
- the conditioned air passing through the terminal box 10 is preferably of substantially constant temperature, which temperature may be cooler or warmer than the unconditioned temperature within the zone.
- a single bladed damper 13 which is adapted to rotate about rod 14 passing between the sidewalls of terminal box 10.
- the rotation of damper 13 may be effected through lever arm 15 attached to damper l3 and rod 16.
- Rod 16 may be connected to common shaft 18 of damper closing motor 19 and damper opening motor 20 through a threaded coupling 17 held in bracket 22. In this manner the rotation of the shaft 18 produces sliding linear motion of coupling 17 and shaft 16, which in turn produces rotational motion of lever arm 15 and damper l3.
- damper stops 21 may be provided along the top and bottom walls of terminal box to allow the damper 13 to come to a securely closed position within the terminal box.
- the face of damper stops 21 may be sloped at an appropriate angle to cooperate with damper 12 so that damper 13 may lie flat against the stops in the closed position.
- Probe 30 Disposed within inlet portion 11 of terminal box 10 are sensing probes 30 and 31.
- Probe 30 is arranged facing directly upstream of the air flow and probe 31 is arranged within the airstream such that its orifice is perpendicular to the direction of air flow.
- Probes 30 and 31 have tubular passageways whereby the pressures sensed by each within the airstream are communicated to a pressure responsive means 32.
- the pressure responsive means 32 comprises an upper chamber 33 and a lower chamber 34 separated by a diaphragm 35. The flow from probe 30 is fed into lower chamber 34, while the flow from probe 31 is fed into upper chamber 33.
- probe 30 oriented upstream of the flow will measure a pressure equivalent of velocity pressure plus static pressure in inlet 11
- probe 31 oriented perpendicular to the flow will indicate a pressure equivalent to the static pressure minus velocity pressure. It can be seen that the differential pressure across diaphragm 35 will then be equal to twice' the velocity pressure at inlet 11. Moreover, the probes measure system pressures directly, and require no artificial pressure drop for their operation.
- Power to operate damper motors 19 and 20 is provided by power source 50, which may be building line voltage, the voltage being stepped down by transformer 51. Completing the control circuit is thermostat 52 the operation of which will be explained in more detail hereinafter.
- Switch 60 carries common terminal 62, normally closed terminal 63 and normally open terminal 64.
- Switch 61 carries similar terminals, specifically common terminal 65, normally closed terminal 66, and normally open terminal 67. The terminals of switches 60 and 61 are actuated to the open and closed positions in response to the temperature sensed at bulb 68.
- air is conditioned at a central source and is distributed through a duct network to terminal boxes, such as terminal box 10, from which it flows into the zone to be conditioned.
- terminal boxes such as terminal box 10
- the air issupplied at substantially constant temperature, and the temperature of the zone is then adjusted by adjusting the volume of conditioned air delivered to that zone.
- the conditioned air supplied has been cooled at a central point and is provided to the zone at a temperature below that within the zone.
- transformer 51 One side of transformer 51 is electrically connected to common terminal 40 of snap-action switch 38, while the other side of transformer 51 is connected to closing motor 19 and opening motor 20.
- Normally closed contact 41 of switch 38 is connected to the bimetal element of thermostat 52.
- the low side, or falling temperature side of thermostat 52 is connected to damper closing motor 19, and the high side, or temperature rising side of thermostat 52 is connected to damper opening motor 20.
- thermostat 52 closes the circuit to the damper closing motor 19, driving the damper toward a closed position and reducing the supply of cooled air entering the zone.
- the bimetal contact of the thermostat moves away from the low side contact, opening the circuit to the damper closing motor 19 and closing the circuit to the damper opening motor 20. This action reverses the rotation of shaft 19 and moves the damper toward an open position, thereby admitting a greater quantity of cooled air to terminal box 10 and to the conditioned zone through outlet 12.
- the damper motors l9 and 20 are preferably of the type having a very slow rate of rotation so a time on the order of several minutes is required to move the damper from the open position to the closed position.
- Removing contact 41 from the circuit immediately removes thermostat 52from the circuit to the damper motors.
- contact 42 is closed, providing power directly to the damper closing motor 19 and driving damper 13 toward a closed position. This action will continue until damper 13 is sufficiently closed to reduce the air flow through inlet 11 to a point whereby diaphragm 35 recedes toward its neutral position due to a decrease in differential pressure as sensed by probes 30 and 31.
- contact 42 is opened and normally closed contact 41 again becomes closed. This discontinues power to the damper closing motor 19 and brings thermostat 52 back into the circuit.
- the flow limiting device in circuit will generally come into play when a zone encounters a greater than normal heat load requiring an unusually high demand for cooling. It is generally during such periods that the flow limiting circuit will be necessary to override the thermostatic circuit in order to maintain air flow within desired limits. As has been pointed out, when the flow limiting circuit is energized, it immediately supplies power to the damper closing motor 19, even though the thermostat is calling for cooling. The flow limiting circuit remains energized until the flow volume through inlet 11 has been reduced within design operating limits, at which time contact shifts from terminal 42 to terminal 41 of switch 38, thereby de-energizing the flow limiting circuit and re-energizing the thermostatic circuit.
- circuit and control means described with reference to FIG. 1 is effective in controlling air flow under a constant heating or cooling demand, it can be seen that the circuit would not operable in an installation wherein a seasonal or other switchover from heating to cooling was required. For example, it can be seen if heated rather than cooled air were being supplied through inlet 11 to terminal box and ultimately to the conditioned space through outlet 12, an increase in zone temperature would cause the thermostat bimetal contact to move to the right to the high side contact and to close the circuit to damper opening motor20. This, of course, would result in an even greater quantity of heated air being introduced into the zone which would in turn cause further rise in temperature, and keep the bimetal contact closed on the high side contact.
- the additional switches shown in FIG. 2 are provided.
- the high side of the thermostat is connected to the terminal of switch 60 and the low side of the thermostat is connected to the common terminal of switch 61.
- the terminal 63 of switch 60 is connected to terminal 67 of switch 61 which is then connected to the damper opening motor 20.
- the normally closed terminal 66 of switch 61 is connected to normally open terminal 64 of switch 60, which is in turn connected to one side of damper closing motor 19 and to normally open terminal 42 of switch 38.
- terminal 64 of switch 60 and terminal 67 of switch 61 respectively indicates their electrical configuration with regard to common terminal 62 and common terminal 65 respectively.
- the opening and closing of contacts 63, 64, 66, and 67 occurs in response to a temperature sensed by bulb 68 which may be located in the air supply duct or inlet.
- Switches 60 and 61 therefor will be selected to operate at a given set point, wherein contact 63 and 66 are always closed above a certain temperature, and terminal 64 and 67 become closed when the temperature falls below that preselected set point.
- Bulb 68 then merely senses the temperature and provides switches 60 and 61 with the necessary input to cause the opening and closing of the aforementioned terminals.
- pressure responsive means 32 maintains an identical function regardless of the addition of the seasonal switchover means. That is, in the event that the volume flow through inlet 1 1 exceeds the design maximum, normally closed terminal 41 of switch 38 will open and the normally opened terminal 42 will close thereby supplying power directly to damper closed motor 19 and driving the damper toward a more closed position, regardless of whether cooled or heated air is being supplied to the conditioned zone and regardless of the demand for heating or cooling on the part of the thermostat.
- damper closing motor 19 will be actuated to drive damper 13 toward a closed position as has been described in detail herein before.
- damper 13 is sufficiently closed to reduce the air flow through inlet moved toward a more open position. Should this continue for an extended period of time, the air flow may once again exceed the desired limitations.
- the basic air distributing apparatus remains the same and the control circuit is somewhat modified to provide for an additional snapaction switch 39.
- the common terminal of snap-action switch 38 is connected to the high side terminal of thermostat 52.
- the normally closed terminal 41 connects to one side-of the damper opening motor 20.
- the common terminal of snap-action switch 39 is connected to the power supply transformer and the bimetal elements of thermostat 52.
- the normally open terminal N of switch 39 is connected to one side of damper closing motor 19 and to the low side contact of thermostat 52.
- thermostat 52 moves to the right and contacts the high side terminal. This energizes the circuit to the damper opening motor by way of common terminal 40 and terminal 41 of switch 38. In this manner, the damper 13 is driven to a more open position in order to admit greater quantities of cool air.
- terminal 42 When the air flow in the duct 11 exceeds the preset maximum, terminal 42 becomes closed and terminal 41 becomes opened. This opens the circuit to damper opening motor 20 and terminates the opening movement of the damper, allowing the damper to remain at its preset maximum opening.
- terminal NC of switch 39 will be opened and terminal N0 of switch 39 will be closed. This then supplies power directly to damper closing motor 19, energizing that motor and driving the damper towards a closed position. This action continues until such time as the air flow through the duct is reduced to a predetermined acceptable level. At that time, terminal N0 of switch 39 opens, opening the circuit thereby stopping the damper.
- damper opening motor 20 remains out of this circuit without a further drop in flow, however, the damper closing motor 19 is now connected to the low side terminal of thermostat 52 so that in the event that the temperature in the zone falls damper closing motor 19 will be energized, directly driving the damper towards a more closed position.
- switch 39 might be set to cut into the circuit at 300 CFM and cut out at 270 CFM, whereas switch 39 would cut in at 330 CFM and cut out at 300 CFM.
- An air distribution system for delivering conditioned air at a preselected substantially constant temperature to a plurality of zones wherein the temperature of each of said zones is controlled by varying the volume of conditioned air delivered to said zone, said system including ducts for carrying conditioned air from a source to at least one air terminal unit for delivering conditioned air to at least one of said zones, said unit including air throttling means for varying the volume of conditioned air delivered to said zone, said throttling means being normally responsive to a zone thermostat whereby said throttling means is caused to supply an increased volume of conditioned air in response to a first position of said thermostat, a duct temperature sensor, temperature responsive switch means in operative communication with said zone thermostat and said throttling means and responsive to said duct temperature sensor whereby said throttling means is caused to supply a decreased volume of conditioned air in response to said first position of said thermostat when the duct temperature rises above a preselected temperature; means for sensing variations in the rate of air flow into said unit, pressure responsive means communicating with said sens
- said air throttling means includes a motor driven blade damper.
- the apparatus according to claim 2 including two coaxially mounted electric motors, one of said motors driving said damper in a first direction and the other of said motors driving said damper in the opposite direction.
- said temperature responsive switch means includes a pair of interconnected snapaction switches in operative communication with said duct temperature sensor.
- each of said snap-action switches have a common contact, a normally closed contac t, and a normally open contact, said normally closed contact of each switch being electrically connected to the normally open contact of the other switch.
- An air distribution system comprising in combination:
- duct means connecting a plurality of zones with said central source
- damper means in at least one of said terminal boxes, said damper means being openable and closeable to vary the volume of air passing from said terminal box to said zone;
- switch means operably connecting said motor means and said temperature responsive means and including duct temperature sensing means, said switch means causing said motor means to drive said damper means toward an opened position upon a decrease in temperature in said zone when said duct temperature sensing means senses a temperature above a preset limit;
- sensing means communicating with pressure responsive means movable in response to changes in said air flow rate to override said temperature responsive means when said air flow rate exceeds a predetermined maximum rate.
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- Engineering & Computer Science (AREA)
- Physics & Mathematics (AREA)
- Fluid Mechanics (AREA)
- Chemical & Material Sciences (AREA)
- Combustion & Propulsion (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Air-Flow Control Members (AREA)
- Air Conditioning Control Device (AREA)
Abstract
Description
Claims (7)
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
US12473271A | 1971-03-16 | 1971-03-16 |
Publications (1)
Publication Number | Publication Date |
---|---|
US3690548A true US3690548A (en) | 1972-09-12 |
Family
ID=22416542
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
US124732A Expired - Lifetime US3690548A (en) | 1971-03-16 | 1971-03-16 | Air distribution control |
Country Status (8)
Country | Link |
---|---|
US (1) | US3690548A (en) |
AU (1) | AU455698B2 (en) |
CA (1) | CA954370A (en) |
DE (1) | DE2213212A1 (en) |
FR (1) | FR2130283B1 (en) |
GB (1) | GB1382644A (en) |
IT (1) | IT952285B (en) |
ZA (1) | ZA721820B (en) |
Cited By (6)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US4011735A (en) * | 1973-11-30 | 1977-03-15 | Westinghouse Electric Corporation | Blower system and control system therefor |
US4182484A (en) * | 1978-04-24 | 1980-01-08 | The Trane Company | Temperature control for variable volume air conditioning system |
US4449664A (en) * | 1980-06-27 | 1984-05-22 | Topre Corporation | Air quantity regulating apparatus for air conditioning |
US4556169A (en) * | 1984-06-07 | 1985-12-03 | Honeywell Inc. | On-off thermostat based modulating air flow controller |
US20120255851A1 (en) * | 2011-04-05 | 2012-10-11 | Clark Donnell Freeman | Combination Pressure and Temperature Sensor for Simultaneous Temperature and Pressure Analyzing in HVAC Ducts |
US20150066222A1 (en) * | 2013-09-05 | 2015-03-05 | Activos Alan, S.L. | Regulation method for regulating an air conditioning system |
Families Citing this family (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
CA1296941C (en) * | 1986-12-01 | 1992-03-10 | Edward F. Wright, Jr. | Static pressure control in variable air volume delivery systems |
SE458802B (en) * | 1987-04-03 | 1989-05-08 | Stifab Ab | CONTROL DEVICE FOR SETTING A JAM IN A VENTILATION CHANNEL |
Citations (5)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US2196687A (en) * | 1937-01-16 | 1940-04-09 | Honeywell Regulator Co | Air conditioning system |
US2236914A (en) * | 1939-02-17 | 1941-04-01 | Honeywell Regulator Co | Temperature control system |
US2257540A (en) * | 1936-06-25 | 1941-09-30 | Hoover Co | Air conditioning system |
US2327208A (en) * | 1941-09-15 | 1943-08-17 | Honeywell Regulator Co | Control device |
US2598397A (en) * | 1949-10-05 | 1952-05-27 | Gen Electric | Air-cooling attachment for warm air furnace systems |
-
1971
- 1971-03-16 US US124732A patent/US3690548A/en not_active Expired - Lifetime
-
1972
- 1972-03-07 CA CA136,481A patent/CA954370A/en not_active Expired
- 1972-03-15 FR FR7209042A patent/FR2130283B1/fr not_active Expired
- 1972-03-15 GB GB1212172A patent/GB1382644A/en not_active Expired
- 1972-03-15 IT IT49016/72A patent/IT952285B/en active
- 1972-03-16 DE DE19722213212 patent/DE2213212A1/en active Pending
- 1972-05-13 AU AU39934/72A patent/AU455698B2/en not_active Expired
-
1973
- 1973-03-16 ZA ZA721820A patent/ZA721820B/en unknown
Patent Citations (5)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US2257540A (en) * | 1936-06-25 | 1941-09-30 | Hoover Co | Air conditioning system |
US2196687A (en) * | 1937-01-16 | 1940-04-09 | Honeywell Regulator Co | Air conditioning system |
US2236914A (en) * | 1939-02-17 | 1941-04-01 | Honeywell Regulator Co | Temperature control system |
US2327208A (en) * | 1941-09-15 | 1943-08-17 | Honeywell Regulator Co | Control device |
US2598397A (en) * | 1949-10-05 | 1952-05-27 | Gen Electric | Air-cooling attachment for warm air furnace systems |
Cited By (7)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US4011735A (en) * | 1973-11-30 | 1977-03-15 | Westinghouse Electric Corporation | Blower system and control system therefor |
US4182484A (en) * | 1978-04-24 | 1980-01-08 | The Trane Company | Temperature control for variable volume air conditioning system |
US4449664A (en) * | 1980-06-27 | 1984-05-22 | Topre Corporation | Air quantity regulating apparatus for air conditioning |
US4556169A (en) * | 1984-06-07 | 1985-12-03 | Honeywell Inc. | On-off thermostat based modulating air flow controller |
US20120255851A1 (en) * | 2011-04-05 | 2012-10-11 | Clark Donnell Freeman | Combination Pressure and Temperature Sensor for Simultaneous Temperature and Pressure Analyzing in HVAC Ducts |
US20150066222A1 (en) * | 2013-09-05 | 2015-03-05 | Activos Alan, S.L. | Regulation method for regulating an air conditioning system |
US9664403B2 (en) * | 2013-09-05 | 2017-05-30 | Ingevert 2000, S.L. | Regulation method for regulating an air conditioning system |
Also Published As
Publication number | Publication date |
---|---|
FR2130283B1 (en) | 1976-08-06 |
AU3993472A (en) | 1973-09-20 |
CA954370A (en) | 1974-09-10 |
AU455698B2 (en) | 1974-11-12 |
DE2213212A1 (en) | 1972-09-28 |
IT952285B (en) | 1973-07-20 |
FR2130283A1 (en) | 1972-11-03 |
ZA721820B (en) | 1973-10-31 |
GB1382644A (en) | 1975-02-05 |
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Legal Events
Date | Code | Title | Description |
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AS | Assignment |
Owner name: TRANE COMPANY, THE Free format text: MERGER;ASSIGNOR:A-S CAPITAL INC. A CORP OF DE;REEL/FRAME:004334/0523 |
|
AS | Assignment |
Owner name: TRANE COMPANY THE Free format text: MERGER;ASSIGNORS:TRANE COMPANY THE, A CORP OF WI (INTO);A-S CAPITAL INC., A CORP OF DE (CHANGED TO);REEL/FRAME:004372/0370 Effective date: 19840224 Owner name: AMERICAN STANDARD INC., A CORP OF DE Free format text: MERGER;ASSIGNORS:TRANE COMPANY, THE;A-S SALEM INC., A CORP. OF DE (MERGED INTO);REEL/FRAME:004372/0349 Effective date: 19841226 |
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Owner name: A-S CAPITAL INC., A CORP OF DE Free format text: MERGER;ASSIGNOR:TRANE COMPANY THE A WI CORP;REEL/FRAME:004432/0765 Effective date: 19840224 |
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Owner name: BANKERS TRUST COMPANY, NEW YORK Free format text: SECURITY INTEREST;ASSIGNOR:TRANE AIR CONDITIONING COMPANY, A DE CORP.;REEL/FRAME:004905/0213 Effective date: 19880624 Owner name: BANKERS TRUST COMPANY, 4 ALBANY STREET, 9TH FLOOR, Free format text: SECURITY INTEREST;ASSIGNOR:TRANE AIR CONDITIONING COMPANY, A DE CORP.;REEL/FRAME:004905/0213 Effective date: 19880624 Owner name: BANKERS TRUST COMPANY Free format text: SECURITY INTEREST;ASSIGNOR:AMERICAN STANDARD INC., A DE. CORP.,;REEL/FRAME:004905/0035 Effective date: 19880624 |
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Owner name: CHEMICAL BANK, AS COLLATERAL AGENT, NEW YORK Free format text: ASSIGNMENT OF SECURITY INTEREST;ASSIGNOR:BANKERS TRUST COMPANY, AS COLLATERAL TRUSTEE;REEL/FRAME:006565/0753 Effective date: 19930601 |
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Owner name: AMERICAN STANDARD, INC., NEW JERSEY Free format text: RELEASE OF SECURITY INTEREST (RE-RECORD TO CORRECT DUPLICATES SUBMITTED BY CUSTOMER. THE NEW SCHEDULE CHANGES THE TOTAL NUMBER OF PROPERTY NUMBERS INVOLVED FROM 1133 TO 794. THIS RELEASE OF SECURITY INTEREST WAS PREVIOUSLY RECORDED AT REEL 8869, FRAME 0001.);ASSIGNOR:CHASE MANHATTAN BANK, THE (FORMERLY KNOWN AS CHEMICAL BANK);REEL/FRAME:009123/0300 Effective date: 19970801 |
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AS | Assignment |
Owner name: AMERICAN STANDARD, INC., NEW JERSEY Free format text: RELEASE OF SECURITY INTEREST;ASSIGNOR:CHASE MANHATTAN BANK, THE (FORMERLY KNOWN AS CHEMICAL BANK);REEL/FRAME:008869/0001 Effective date: 19970801 |