Abstract: A control device, refrigerator system utilizing the control device and methods of making the same are provided, the control device comprising a housing having a valve seat and having an inlet and an outlet interconnected together by the valve seat, a movable valve member carried by the housing and being adapted to open and close the valve seat by being respectively moved to an open position thereof and a closed position thereof, and a shape memory unit carried by the housing and being operatively interconnected to the valve member to move the valve member to one of the positions thereof by the unit sensing a temperature above a first temperature and to move the valve member to the other of the positions thereof by the unit sensing a temperature below a second temperature, the shape memory unit comprising a shape memory wire having opposed ends interconnected to the housing and having an intermediate portion thereof operatively interconnected to said valve member.

Abstract: A control device, refrigerator system utilizing the control device and methods of making the same are provided, the control device comprising a housing having a valve seat and having an inlet and an outlet interconnected together by the valve seat, a movable valve member carried by the housing and being adapted to open and close the valve seat by being respectively moved to an open position thereof and a closed position thereof, and a shape memory unit carried by the housing and being operatively interconnected to the valve member to move the valve member to one of the positions thereof by the unit sensing a temperature above a first temperature and to move the valve member to the other of the positions thereof by the unit sensing a temperature below a second temperature, the shape memory unit comprising a shape memory wire having opposed ends interconnected to the housing and having an intermediate portion thereof operatively interconnected to said valve member.

Abstract: An expansion device for a refrigeration system, piston therefor and methods of making the same are provided, the expansion device comprising a housing having opposed ports for coupling the device in the system and being separated from each other by an internal valve seat of the housing, and a movable piston disposed in the housing and having a first end surface adapted to engage against the valve seat to tend to close the same when the piston is disposed in a first position thereof in the housing, the housing having an annular shoulder, the piston having a second end surface for engaging against the shoulder when the piston is disposed in a second position thereof in the housing, the piston having a passage passing therethrough and through the end surfaces thereof for interconnecting the opposed ports together in a restricted manner when the piston is in the first position thereof, the piston having an outer peripheral surface interconnecting the end surfaces together and being provided with a plurality of gr

Abstract: An expansion device for a refrigeration system, piston therefor and methods of making the same are provided, the expansion device comprising a housing having opposed ports for coupling the device in the system and being separated from each other by an internal valve seat of the housing, and a movable piston disposed in the housing and having a first end surface adapted to engage against the valve seat to tend to close the same when the piston is disposed in a first position thereof in the housing, the housing having an annular shoulder, the piston having a second end surface for engaging against the shoulder when the piston is disposed in a second position thereof in the housing, the piston having a passage passing therethrough and through the end surfaces thereof for interconnecting the opposed ports together in a restricted manner when the piston is in the first position thereof, the piston having an outer peripheral surface interconnecting the end surfaces together and being provided with a plurality of gr

Abstract: A control device, refrigerator system utilizing the control device and methods of making the same are provided, the control device comprising a housing having a valve seat and having an inlet and an outlet interconnected together by the valve seat, a movable valve member carried by the housing and being adapted to open and close the valve seat by being respectively moved to an open position thereof and a closed position thereof, a coiled compression shape memory spring carried by the housing and being operatively interconnected to the valve member to move the valve member to one of the positions thereof by the spring axially expanding from a closed coil bound condition thereof upon the spring sensing a temperature above a first temperature and to move the valve member to the other of the positions thereof by the spring axially contracting into the closed coil bound condition thereof upon the spring sensing a temperature below a second temperature, and an electrically operated heater having at least a portion

Abstract: An expansion device for a refrigeration system, piston therefor and methods of making the same are provided, the expansion device comprising a housing having opposed ports for coupling the device in the system and being separated from each other by an internal valve seat of the housing, and a movable piston disposed in the housing and having a first end surface adapted to engage against the valve seat to tend to close the same when the piston is disposed in a first position thereof in the housing, the housing having an annular shoulder, the piston having a second end surface for engaging against the shoulder when the piston is disposed in a second position thereof in the housing, the piston having a passage passing therethrough and through the end surfaces thereof for interconnecting the opposed ports together in a restricted manner when the piston is in the first position thereof, the piston having an outer peripheral surface interconnecting the end surfaces together and being provided with a plurality of gr

Abstract: A refrigerator system, a control device therefor and methods of making and operating the same are provided, the system having a frozen food compartment and a non-frozen food compartment interconnected together by an air circulating unit that has a control valve unit therein for controlling the amount of opening of the air circulating unit between the compartments, the control valve unit comprising a housing having a movable valve member and a temperature sensing unit operatively interconnected to the valve member to control the position of the valve member in relation to the temperature sensed by the temperature sensing unit, the system having a fan for forcing an air flow through the air circulating unit from the frozen food compartment to the non-frozen food compartment when the fan is operating and the valve member is in an open condition thereof, the system having structure for causing the fan to be operating only when the valve member is in a certain open condition thereof.

Abstract: A temperature sensor construction and method of making the same are provided, the temperature sensor construction comprising a thermistor having opposed sides, a pair of conductors respectively secured to the opposed sides of the thermistor and having portions thereof extending away from the thermistor, an electrically insulating member having an opening therethrough and telescopically receiving the thermistor in the opening thereof, the insulating member having an outer peripheral edge, a pair of metallic foil members disposed on the opposed sides of the thermistor and being insulated from each other by the insulating member, and two outer layers of electrically insulating material secured to each other and encapsulating the foil members and the conductors and the insulating member and the thermistor therebetween, the opening in the insulating member having a portion thereof that extends to and interrupts the peripheral edge thereof, one of the conductors having a portion thereof disposed within the portion

Abstract: An expansion device for a refrigeration system, piston therefor and methods of making the same are provided, the expansion device comprising a housing having opposed ports for coupling the device in the system and being separated from each other by an internal valve seat of the housing, and a movable piston disposed in the housing and having a first end surface adapted to engage against the valve seat to tend to close the same when the piston is disposed in a first position thereof in the housing, the housing having an annular shoulder, the piston having a second end surface for engaging against the shoulder when the piston is disposed in a second position thereof in the housing, the piston having a passage passing therethrough and through the end surfaces thereof for interconnecting the opposed ports together in a restricted manner when the piston is in the first position thereof, the piston having an outer peripheral surface interconnecting the end surfaces together and being provided with a plurality of gr

Abstract: A refrigerator system, a control device and methods of making the same are provided, the system having a frozen food compartment and a fresh food compartment operatively interconnected together by the control device having a housing provided with a passage interconnecting the compartments together, the housing having a movable damper valve member controlling the passage and a temperature responsive unit operatively interconnected to the valve member to move the valve member between open and closed positions thereof in relation to the temperature sensed by the unit. An electrical heater is carried by the housing and is disposed adjacent the temperature responsive unit to cause the temperature responsive unit to open the passage when the electrical heater has been energized for a certain period of time.

Abstract: A refrigerator system, a control device and methods of making the same are provided, the system having a frozen food compartment and a fresh food compartment operatively interconnected together by the control device having a housing provided with a passage interconnecting the compartments together, the housing having a movable damper valve member controlling the passage and a temperature responsive unit operatively interconnected to the valve member to move the valve member between open and closed positions thereof in relation to the temperature sensed by the unit. An electrical heater is carried by the housing and is disposed adjacent the temperature responsive unit to cause the temperature responsive unit to open the passage when the electrical heater has been energized for a certain period of time.

Abstract: An electrical switch construction having a frame carrying a movable switch blade and a latch structure for latching the switch blade in one position when the latch structure is latched and for causing the switch blade to be in another position when the latch structure is unlatched, the latch structure comprising an armature movably carried by the frame and a cam movably carried by the frame and being operatively associated with the switch blade to hold the switch blade in the one position thereof when the cam is latched by the armature being in a latching position thereof and being moved to an unlatching position from the cam when the armature is actuated by an electromagnetic actuator. The armature comprises two members secured together, one of the members being formed of plastic material and having a hook end for latching with the cam and the other of the members being formed of metal to be magnetically attracted by the actuator.

Abstract: A fluid operated diaphragm assembly having a pair of diaphragm members each provided with annular inner and outer peripheral portions separated from each other by an annular fluted portion. A ring member is disposed between the outer peripheral portions of the diaphragm members and is secured respectively thereto whereby a chamber is defined between the diaphragm members inboard of the ring member. The diaphragm members each has a natural tendency to maintain its respective inner and outer peripheral portions coplanar with each other whereby the inner peripheral portions are normally spaced from each other a distance that is approximately the same dimension as the thickness of the ring member.

Abstract: A fluid operated diaphragm assembly having a pair of diaphragm members each provided with annular inner and outer peripheral portions separated from each other by an annular fluted portion. A ring member is disposed between the outer peripheral portions of the diaphragm members and is secured respectively thereto whereby a chamber is defined between the diaphragm members inboard of the ring member. The diaphragm members each has a natural tendency to maintain its respective inner and outer peripheral portions coplanar with each other whereby the inner peripheral portions are normally spaced from each other a distance that is approximately the same dimension as the thickness of the ring member.

Abstract: An electrical switch construction having a housing provided with an acutuator for causing movement of a movable switch blade relative to an overtravel compensating fixed switch blade, the fixed switch blade being secured to a rigid terminal carried by the housing and having an extension thereof that is disposed in the path of movement of the fixed switch blade to limit movement thereof in one direction.

Abstract: A fluid operated electrical switch construction having a first housing provided with an electrical switch therein and a second housing having an expandible and contractible fluid operated power element therein, the housings being secured together in a predetermined assembled relationship so that a motion transmitting arrangement is disposed in both of the housings and extends between the power element and the switch to transmit movement of the element to the switch to operate the same. The motion transmitting arrangement has a length adjustment unit therein that is adapted to be adjusted by first causing relative movement between the housings while the housings are assembled together but before the same are secured together so that once the adjustment unit has been adjusted to provide the proper length, the housings are secured together in such assembled relation.

Abstract: A fluid operated electrical switch construction having a first housing provided with an electrical switch therein and a second housing having an expandible and contractible fluid operated power element therein, the housings being secured together in a predetermined assembled relationship so that a motion transmitting arrangement is disposed in both of the housings and extends between the power element and the switch to transmit movement of the element to the switch to operate the same. The motion transmitting arrangement has a length adjustment unit therein that is adapted to be adjusted by first causing relative movement between the housings while the housings are assembled together but before the same are secured together so that once the adjustment unit has been adjusted to provide the proper length, the housings are secured together in such assembled relation.