Abstract: A deicing system may include one or more walkway cassettes, a temperature control element, and a control unit. Each walkway cassette may include a casing and a heat tracing; cable in good thermal contact with the casing. The temperature control element may include a comparatively smaller casing and a heat tracing cable in good thermal contact with the casing, and may exhibit similar heat loss characteristics to the walkway cassettes. The temperature control element may include a temperature sensor on a top surface of its casing, which may generate temperature data and send the temperature data to the control unit. The control unit may provide power to the temperature control element and the walkway cassette(s) in parallel based on the temperature data. The temperature control element may be placed in proximity to the walkway cassette(s), and may be exposed to substantially the same environmental conditions as the walkway cassettes.

Abstract: A sensor arrangement having a rotatable driving shaft extending along a rotation axis and comprising a bore extending from a first end face of the shaft along the rotation axis; a magnet arranged at least partially within the bore and coupled to the driving shaft, the magnet configured to generate a magnetic field within the bore; a sensor element arranged at least partially within the bore, and configured to sense a rotation of the magnetic field in response to rotation of the driving shaft; and a magneto-static shield arranged to surround the magnet and the sensor element, wherein the magneto-static shield is stationary with respect to the driving shaft.

Abstract: A programmable and on-demand hot water heater unit that locally and remotely changes the set temperature for a conventional water heater and locally and remotely activates the hot water recirculation pump associated with a conventional hot water heating system.

Abstract: A bimetal unit for a circuit breaker is disclosed, the bimetal unit including a bimetal element for releasing a trip mechanism of the circuit breaker. In an embodiment, the bimetal element is surrounded, in particular coaxially surrounded, by a ferrous ring and a copper coil wound around the ferrous ring. The ferrous ring and copper coil provide a compensation device which produces additional heat and, as a result, stronger bending to the bimetal element when a current flows through the same bimetal element. An embodiment of the invention is useful to employ bimetal element adapted for higher-rated current in a circuit breaker of lower-rated current as bimetal element exhibits similar bending behavior as in higher-rated circuit breaker. This enhances calibration and reduces manufacturing costs. A trip unit, a circuit breaker, a series of circuit breakers, and a method for calibrating a circuit breaker employing the bimetal unit, are also disclosed.

Abstract: A thermostat includes a heat-conductive guide with an upper side and a lower side; a top board with an upper side and a lower side; a double-metal plate; a first rivet; a short spring plate with a first electrical contact disposed thereon; a long spring plate being connected with the short spring plate; a contact board with a second electrical contact disposed thereon; and a second rivet. The upper side of the heat-conductive guide is connected with the lower side of the top board through the first rivet. The lower side of the heat-conductive guide is connected with the double-metal plate through the first rivet. The long spring plate and the contact board are connected with the lower side of the top board through the second rivet. The double-metal plate is configured to sense a temperature of the heat-conductive guide and actuate the short spring plate accordingly.

Abstract: A thermal overload relay includes a main bimetal for detection of an overload current, a shifter associated with the main bimetal, a release lever working according to a displacement of the shifter, a contact reversing mechanism for changing-over contacts by reversing action caused by rotation of the release lever, and a manipulation structure for manipulating the release lever and the contact reversing mechanism. The manipulation structure includes a reset bar for returning the contact reversing mechanism to an initial state. The reset bar is arranged to change-over between a manual reset state in which the reset bar can be pushed-in and an automatic reset state in which the reset bar is pushed-in and turned from the manual reset state and held in that state.

Abstract: A thermal overload relay is provided with an external case, and an adjustment dial with a cam inserted into an adjustment dial insertion hole provided in the external case for adjusting a settling current. A press-fitting section is provided at one of the adjustment dial and the adjustment dial insertion hole, and a locking section is provided at the other of the adjustment dial and the adjustment dial insertion hole. The press-fitting section is press-fit and retained in the locking section.

Abstract: A dual contact thermostat includes a bimetallic strip that partially controls two sets of contact points. An adjustable temperature actuator engages the contact points whereby the activation temperature of each set of points when the points are first closed is determined by the bimetallic strip in combination with the adjustable temperature actuator.

Abstract: A dual contact thermostat includes a bimetallic strip that partially controls two sets of contact points. An adjustable temperature actuator engages the contact points whereby the activation temperature of each set of points when the points are first closed is determined by the bimetallic strip in combination with the adjustable temperature actuator.

Abstract: Methods and systems for actuating a negative rate switch. A negative rate switch comprising a plunger and a resilient actuator thereof can be provided, wherein a highest plunger force occurs at a free position and a lowest plunger force occurs at a full over travel position. The negative rate switch can be configured such that when the resilient actuator provides resilient actuating force to overcome a free position force associated with the free position, the plunger moves without interruption through a total range of travel thereof and when the resilient actuating force drops slightly below a full over-travel plunger force associated with the full over travel position, the negative rate switch overcomes the resilient actuating force to return the plunger to the free position thereof without interruption.

Abstract: A concealed adjustable temperature switch includes a fixed plate, an adjusting block threadedly engaged with a screw hole of the fixed plate, a bimetal plate, and a metal plate. Mounted on the adjusting block are upper and lower positioning rings and a fixing ring between the positioning rings. The fixed ring includes a hole through which the adjusting block extends. The fixing ring includes a stop projecting toward the fixed plate. The stop includes two sides having a height greater than a thickness of the fixed plate. A distance between the stop and a center of the hole of the fixing ring is greater than that between a front edge of the fixed plate and a center of the screw hole of the fixed plate and than that between either one of two sides of the fixed plate to the center of the screw hole of the fixed plate.

Abstract: An apparatus is described for mounting a bimetal coil in a thermostat having an anticipator operable via an anticipator circuit. The apparatus includes an insulating member configured to insulate the coil from the anticipator circuit. The apparatus also includes a conductive shaft configured for mounting the coil and anticipator thereon. The insulating member is further configured for mounting between the coil and the shaft. This apparatus allows an inner end of a bi-metal coil to be secured easily in a thermostat, thus eliminating a need for more expensive mounting methods and costly insulating parts. The apparatus also simplifies calibration while reducing costs of assembly and materials.

Abstract: A thermal overload open-phase tripping device includes in a case bimetals corresponding to different phases; a differential shifter mechanism composed of a push shifter and a pull shifter, linked to operating ends of the bimetals, and an interlocking plate; and a compensating bimetal for transmitting output from the shifter mechanism to an opening and closing mechanism section of a breaker main body. The push and pull shifters are slidably supported to extend over interphase partition walls in the case, and a case cover is placed and held over the push and pull shifters. Rib-shaped projections projecting from an inner surface of the case cover and facing the top surfaces of the shifters are provided as shifter position guides to constrain inclination of the shifters moving in accordance with bending displacement of the bimetals to hold the shifters horizontally.

Abstract: A shape memory actuator includes a shape memory actuator element for biasing an actuated member from an initial rest position to an operative position against the action of return spring means. Holding means are associated with the actuator element for holding the actuated member in its operative position even when the shape memory actuator element is deactivated. These holding means can be deactivated with a subsequent activation of the shape memory actuator element, allowing the actuated member to return to its rest position.

Abstract: A “designer” thermostat also known as the “comfort-stat” which is mountable on the wall or the like having a first temperature range bar extending from a low point of 70 to a high point of 78, appearing in red, and a second temperature range bar extending from a high point of 78 to a low point of 70, appearing in blue. There would further be included a heat/cool button, and an on/auto/fan button, so that for example, when the thermostat is set on cool, the movable indicator would move along the blue bar between 70 and 78 with a digital read out of the temperature of the room on the face of the comfort stat, and when the thermostat is set on heat, the movable indicator would be set on the read bar between 70 and 78 with a digital read out of the temperature of the room. There would further be provided a mounting means for mounting the comfort stat on the wall with a void space between the thermostat for housing of the control wires between the rear face of the thermostat and the wall.

Abstract: A method for adjusting the calibration of a circuit breaker trip mechanism including a terminal element, a bimetal element connected thereto, and a trip bar. Laser energy is applied to lanced or pre-bent surfaces of the terminal element to thermally induce displacement thereof and thereby modify a trip distance between the bimetal element and the trip bar. Where a laser beam is directed to fall on a middle leg of a lanced or pre-bent section of the terminal element, the bimetal element moves in one direction relative to the trip bar. Conversely, where a laser beam is directed to fall on lateral legs of the lanced or pre-bent section of the terminal element, the bimetal element moves in an opposite direction relative to the trip bar. Thus, laser energy may be applied from the same direction, or to the same side of the trip structure, regardless of whether the trip time is to be increased or decreased.

Abstract: A method of calibrating a thermal trigger for an electrical switching device starts with fastening bimetal strips (1) for each phase in the housing of the trigger. Thereafter, the bimetal strips (1) are heated-up with a predetermined calibration current for a predetermined time, and are thus brought into a calibrated position. In the calibrated position, the positioning of each of the free end sections of each bimetal strip (1) is measured on both folded ends opposite each other. Then, two slides (3,4) are fitted with two hinged drive arms (5,6) and are retained in a calibration device. Stops (9) bring the drive arms (5,6) into the previously measured calibrated position of the assigned bimetal strip (1) by sluing. In the calibrated position, the other single-piece arms (8) with the trigger arms (5,6) are attached to the slide (3,4).

Abstract: A method and apparatus for setting striker pin length and armature spring force in a thermal switch. An armature support structure is deformed in order to adjust armature spring force with the result of a spring force which remains constant over time and thermal cycling.

Abstract: A method for adjusting the calibration of a circuit breaker trip mechanism including a terminal element, a bimetal element connected thereto, and a trip bar. Laser energy is applied to lanced or pre-bent surfaces of the terminal element to thermally induce displacement thereof and thereby modify a trip distance between the bimetal element and the trip bar. Where a laser beam is directed to fall on a middle leg of a lanced or pre-bent section of the terminal element, the bimetal element moves in one direction relative to the trip bar. Conversely, where a laser beam is directed to fall on lateral legs of the lanced or pre-bent section of the terminal element, the bimetal element moves in an opposite direction relative to the trip bar. Thus, laser energy may be applied from the same direction, or to the same side of the trip structure, regardless of whether the trip time is to be increased or decreased.

Abstract: A thermal protector includes a header plate and a metal housing having an open end hermetically welded to an peripheral edge of the header plate. The housing is formed into a generally slender shape so as to be suited for mounting on end turns of a stator winding of a three-phase electric motor. A thermally responsive element includes a shallow curved portion at which the element changes states of curvature with snap action in response to different ambient temperatures. The thermally responsive element has two movable contacts secured to it to be disposed symmetrically about a center of the curved portion so that the movable contacts are engageable with and disengageable from fixed contacts respectively. A push piece is disposed in the housing to exert a pushing force on a normally convex side of the thermally responsive element. The pushing force is adjusted by deforming the outer surface portion of the housing for calibration of the operating temperature.

Abstract: In one embodiment of the present invention, a temperature sensitive tip switch comprises a first conductive arm, a second conductive arm disposed in a parallel, spaced apart relation beneath the first conductive arm, a third conductive arm disposed in a parallel relation beneath the second conductive arm, and a temperature sensitive actuator blade disposed in a parallel, spaced apart relation beneath the third conductive arm. The second conductive arm includes a cut-out portion which is capable of downward flexion and the third conductive arm includes a cut-out portion which is capable of downward flexion and which is engaged with the cut-out portion in the second conductive arm. A first pair of normally closed, electrical contacts are mounted on the actuator blade and the third conductive arm. A second pair of normally closed, electrical contacts are mounted on the second conductive arm and the first conductive arm.

Abstract: A solenoid type magnetic trip assembly for a molded case circuit breaker includes an armature biased against an adjustable stop by a tension spring to set the initial gap for the magnetic trip, so that the spring bias remains constant for the full range of the initial gap. The armature includes an elongated magnetically permeable member mounted by a frame to slide longitudinally along a pair of guide rails. The frame defines a trip surface axially aligned with the elongated magnetically permeable member which engages a trip arm on a trip bar to trip the circuit breaker in response to a predetermined level of overcurrent. A bimetal providing a thermal trip function is cantilevered from a support spaced from the trip bar by the armature, but has a terminal portion at the free end projecting toward the trip bar and through which the elongated magnetically permeable member of the armature extends.

Abstract: A heat detection and alarm unit is provided including a housing with a front face, a rear face, a top face, a bottom face and a pair of side faces coupled therebetween defining an interior space. A speaker is situated within the interior space of the housing. The speaker is adapted to emit an audible tone upon the supply of power thereto. A coiled thermostat is provided having a first end located at the center thereof rotatably coupled within the interior space of the housing. The coiled thermostat has a second end with a conductive hammer coupled thereto. Next provided is a battery mounted within the housing for powering purposes. An electrical assembly including a contact is mounted adjacent the conductive hammer. Upon the detection of a predetermined temperature, the hammer engages the contact thereby supplying power to the speaker.

Abstract: A thermostat includes a case assembly with two terminals and movable contacts, one of which is on a resilient blade to open and close a circuit through the terminals. A bimetal disc actuates the blade by heating to open the contacts. A base defines an interface with the case assembly and supports the disc; the interface being deformed or crushed sufficiently to position the blade to define the threshold temperature and to couple the base and case assembly together. The deformable interface is preferably formed by upstanding, curved projections on the base and mating with the case assembly. When deformed, the projections are substantially perpendicular to the bottom panel of the base so that the disc is centered, but is freely movable. Bendable legs secure a cap in position and lock the case assembly and the base together.

Abstract: An adjustable thermostat range limit apparatus consists of a base member having a pair of adjustable temperature limit means. The thermostat range limit apparatus is attached in the proximity of a conventional thermostat so that the adjustable temperature limit means can come into contact with the temperature control level of a conventional thermostat. These adjustable temperature limit means will provide for a restriction in the temperature range in which the temperature control lever can be set.

Abstract: A thermostatic switch construction including a housing having a switch arm mounted for movement inside. A bi-metallic snap disk is mounted in the housing and movable in response to temperature change with snap action between two positions of stability. A switch arm actuating plunger is slidably mounted in the housing with its lower end adapted for contact by and snap movement by the bi-metallic snap disk. A creep gap assembly is provided which includes a creep gap screw threadably mounted in the switch arm opposite the upper end of the plunger. Axes of the plunger and the gap set screw are in alignment. The creep space between the lower end of the set screw and the upper end of the plunger is adjustable by rotation of the set screw. A temperature setting adjustment is provided which includes a spring member mounted in the housing with one end of the spring member in direct contact with the bi-metallic snap disk to thereby exert pressure on the disk.

Abstract: Electrical switchgear apparatus comprises a base, a switching circuit element supported by the base and including at least one movable circuit element part, a thermal trip supported by the base for tripping motion in a given direction with respect to the movable circuit element part and a transmission device for imparting the tripping motion to the movable circuit element part, the transmission device comprising first and second members movable with respect to one another in the given direction to define a desired composite length for the transmission device in the given direction.

Abstract: A rotatable control for a broad range, temperature controlling thermostat for a refrigeration compartment of a refrigeration unit enables operation of the refrigeration unit in one of several different operational modes. For example, the refrigeration unit may be operated as a wine cooler or as a standard refrigerator or as a freezer. The control includes a control dial having four, integrally formed, spaced apart stops formed on an inner surface. A stop formed on a cover of the thermostat may be placed between a pair of adjacent stops formed on the control dial to prevent adjustment of the set-point temperature of the refrigeration compartment outside of the particular temperature range associated with the preselected operational mode of the refigeration unit.

Abstract: In the manufacture of a circuit breaker comprising a cover having a snap action blade attached thereto, with a movable contact mounted on the snap action blade, the optimum position of the movable contact with respect to a preselected locus is first determined and the movable contact is adjusted to the optimum position prior to closure of the circuit breaker. The optimum position prevents frying of the circuit breaker during operation.

Abstract: A transfer element (8) is provided in a thermal switch (1) with a housing (2), power supply lines (4) and contacts (5) and (7), with a contact spring (6) and a thermostatic bimetal plate (3). The transfer element is moved up by the snap action of the thermostatic bimetal plate and in so doing takes with it the contact spring (6), opening the contacts. In order to adapt this transfer element (8) in its length precisely to the desired nominal length, a heating into the deformation range of the material forming the transfer element (8) takes place, with a subsequent deformation of the upper edge region. This makes it possible in a simple way to produce the exact nominal length of the transfer element (8).

Abstract: An overcurrent relay comprises a housing having an external portion, an overcurrent responsive mechanism, disposed within the housing, for opening or closing a pair of contacts in response to an overcurrent, an adjusting screw device for adjusting the operating current of the overcurrent responsive mechanism, the adjusting screw device being rotatably supported by the housing and having serrations on the periphery thereof, and an engaging member mounted on the external portion of the housing for engaging with a serration of the adjusting screw device for preventing an unintentional rotation of the adjusting screw device.

Abstract: A thermostat has a lever that adjusts the set point of the thermostat. The lever is limited in its movement by a pair of stops. The stops are inserted in a geometrically designed slot and can be readily moved for convenient adjustment.

Abstract: A space thermostat for the sight handicapped has a raised pointer on the center control point adjustment means which cooperates with raised numbers representing temperature on a cover ring surrounding the control point adjustment means whereby a sight handicapped person can place a finger on the raised pointer and move the control point adjustment means by feeling the raised number to the desired temperature setting for the desired temperature in the space.

Abstract: A condition responsive switching device has a cup-shaped case, a body secured in abutting assembled relationship to the case, the body and case defining a chamber, a switch mounted on the body in the chamber providing a fixed electrical contact and a cantilever mounted leaf spring, the free end of the leaf spring overlying the fixed contact and providing a mobile contact movable into and out of engagement with the fixed contact, a snap disc in the chamber on the side of the leaf spring remote from the body, the snap disc being movable between two positions of stability in response to two different predetermined environmental conditions, the central portion of the snap disc moving from each position of stability to the other position of stability first with a predetermined amount of creep movement followed by snap movement, the disc and spring arm being operably connected so that the switch is closed when the disc is in one position of stability and is open when the disc is in the other position of stability,

Abstract: A temperature responsive regulator switch for controlling the heat of an electric heating device, comprises movable and stationary electric contacts cooperating with one another for assuming open and closed positions and a bimetal operatively coupled to the movable contact for moving it into the open position when the bimetal attains a predetermined temperature. The bimetal is heated by electric current passing therethrough solely in the closed position. The regulator switch further has a heat conductor having a first part adapted to be directly exposed to the heat of the device controlled by the temperature responsive regulator switch and a second part being in a heat-conducting connection with the bimetal for heating the bimetal by the heat generated by the device.

Abstract: A push-to-turn thermal cycling switch for regulating the wattage of a resistance type surface heating unit of a domestic cooking range of the electric type is disclosed. The duty cycle of the heating unit, and thus its heat output is regulated by the switch cycling on and off in accordance with movement of a switch-contained bimetallic element heated by current flowing to the heating unit via the switch. The switch cycling is determined by the position of a disc cam member carried on an axially shiftable, user-rotatable shaft having a detent means for rotatably locking the shaft at an "off" position. The shaft is formed in a single step die-casting operation. A latch secured disc cam retainer facilitates machine assembly of the switch components.

Abstract: A thermostat for controlling heating and cooling apparatuses has a temperature control point adjustment knob connected to a temperature responsive switch means for adjusting the control point thereof. A single lever changeover switch is connected to the temperature responsive switch for selectively connecting either heating or cooling apparatus to the temperature responsive switch. Temperature control point limit stops are connected to the temperature control point adjustment. Upon selecting by the single lever changeover switch either a heating or a cooling operation, the temperature control point limit stops limit the movement of the temperature control point adjustment to a first range of movement when heating is selected and a second range of movement when cooling is selected.

Abstract: A thermostat device for motels/hotels requiring the guest use a key to select a desired room temperature which in turn requires that the thermostat must be set back to a preset temperature when guest desires to lock the door to his motel/hotel room upon leaving the room.

Abstract: A time controlled thermostat provides the setting up or setting down of space temperature during certain selected time periods depending on whether it is controlling heating or cooling apparatus as selected by a changeover lever. The normal control temperature as determined by a temperature responsive switch is set by a first selection lever and the setback temperature set by a second selection lever, during heating operation, as selected by the changeover lever the normal temperature is selected by the second selection lever and the setup temperature by the first selection lever during cooling operation as selected by the changeover lever. Limit stops are provided for limiting the position of the first lever during heating to a maximum temperature and the position of the second lever during cooling for a minimum temperature.

Abstract: A thermostat construction having a one-piece plunger provided with a wing-like section that is engageable with a switchblade on opposite sides of an opening thereof and through which a post means of the wing-like section extends so as to bear against a temperature setting spring.

Abstract: A predetermined limit in the rotation of a manually rotatable control shaft is established by a special knob having a speed nut which secures the knob to the shaft, and an interrupted circular slot in the knob, concentric with the shaft, for cooperating with a fixed projection extending parallel to the shaft and into the circular slot. The device is described as usable in a thermostatically controlled heating system with an auxiliary control for improving efficiency.

Abstract: A probe thermostat is disclosed having a positive-off element included in the switch portion of the thermostat which prevents the switch from being closed when the variable control means of the thermostat is set to its extreme or "off" position. The positive-off element assures that the switch will be open even if a mulfunction occurs in the thermostat which would otherwise result in closing of the switch and undesirable current flow to the heating element. The illustrated form of positive-off element comprises an insulative threaded fastener attached to a portion of the base of the thermostat which engages one of the contact arms to hold it away from the other contact arm when the variable control means is set to its extreme "off" position.

Abstract: A thermostat adapted to regulate the temperature of a given space. The thermostat has a mode selecting member which is movable between a heating mode position and a cooling mode position. A temperature setting member is selectively movable for setting a selected operating temperature of the thermostat and has a preselected maximum heating set point temperature and a preselected minimum cooling set point temperature. One of the temperature setting member and the mode selecting member includes a pair of abutments engageable with the other of the temperature setting member and the mode selecting member when the mode selecting member is in its heating mode position and its cooling mode position to define the preselected maximum heating set point temperature and the preselected minimum cooling set point temperature of the temperature setting members, respectively.

Abstract: In a space thermostat having a control lever for setting the temperature set-point, a force producing means clamps the control lever to the thermostat casing through an elongated slot in the casing. A hollow, rigid thin-walled nut, a compressible anchor ring, and a screw cooperate to provide means for adjusting the value of the clamping force to a value which enables manual movement of the control lever, upon application thereto of a desired force, to a different temperature set-point. The clamping force is further adjustable to a value which prevents manual movement of the control lever when it is desired to provide a locked condition wherein the control lever cannot be manually moved.

Abstract: A thermostat adapted for controlling heating and cooling apparatuses has a temperature control point adjustment means connected to a temperature responsive switch means for adjusting the control point thereof. A changeover switch means is connected to the temperature responsive switch means for selectively connecting either heating or cooling apparatus to the temperature responsive switch means. A temperature control point limit means is connected to the temperature control point adjustment means so that upon selecting by means of the changeover switch means either a heating or a cooling operation, the temperature control point limit means limits the movement of the temperature control point adjustment means to a first range of movement when heating is selected and a second range of movement when cooling is selected.

Abstract: A temperature responsive electrical switching device provides an electrical connection between first and second electrical connectors when the temperature of the device is less than a predetermined threshold temperature and terminates the electrical connection when the temperature of the switching device exceeds the predetermined threshold temperature. The device includes a non-conductive mounting post assembly and stationary and movable contact blades mounted thereon. A temperature responsive bimetal blade cooperates with a non-conductive actuator to move the flexible contact blade out of contact with the stationary contact blade when the predetermined threshold temperature is exceeded. The actuator means includes a non-conductive means defining a cavity holding a quantity of resin which engages the flexible contact blade. By placing the switching device in an oven at a selected temperature, the actuator means is moved by the bimetal blade to the desired position for proper calibration.

Abstract: A thermostatic switch has a thermostatic subassembly located on a header so that movable contacts engage and disengage complementary contacts mounted on the header in response to temperature change. A knurled stud part has an interference fit in a header bore and a nut threadedly engages the opposite end of the stud means and bears against the opposite side of the header. The nut is rotatable for drawing the knurled stud part into the header bore to the desired degree to precisely locate the subassembly relative to the header during switch manufacture and calibration. The interference fit of the knurled stud part in the header bore otherwise cooperates with the nut to prevent rotation or axial movement of the stud means in any direction in the header bore.

Abstract: A setting mechanism for tripping devices of electrical switchgear has a driven inner member carrying a radially extending, resilient detent arm which interacts with stationary detent slots. For joining with an outer driving member, an interrupted ring snap-in connection is provided between the inner and outer elements which is designed so that eccentric forces as well as asymmetrical spreading forces caused by the resilient detent arm and by the application of torque can be transmitted. For this purpose, two larger posts lying one behind the other on the longitudinal axis of the detent arm have right-angled undercuts and two smaller posts disposed between the first posts are provided with radial projections. The projections have side walls lying in planes extending parallel to the longitudinal axis of the setting mechanism. The setting mechanism members are made as complete parts by injection molding of plastic material.

Abstract: A thermostat adapted for controlling heating and cooling apparatuses has a temperature control point adjustment means connected to a changeover switch means whereby upon the adjustment of the temperature control point adjustment means in a first range to select a cooling control point, the changeover switch means only connects the thermostat to the cooling apparatus and when the temperature control point adjustment means is in the heating range, the changeover switch means only connects the thermostat to the heating apparatus. The limited range of temperature selection in the first and second range is an energy conservation feature of the thermostat.

Abstract: A fluid coupling device of the type including a rotatable coupling body defining a fluid operating chamber and a coupling member rotatable relative to the coupling body. A cover is associated with the coupling body and coupling member to define a fluid reservoir chamber, and a valve is operable to control fluid communication between the operating chamber and the reservoir chamber. The valve is mounted on a shaft which is rotatable relative to the cover and the rotational position of the shaft is controlled by a bimetallic coil having one end connected to the shaft and a second end which must be fixed relative to the cover. A bracket is fixedly attached to the cover and a clip member, in movable engagement with the bracket, receives the second end of the bimetal coil to prevent substantial rotational movement of the second end relative to the bracket.