Abstract: To provide a temperature sensing tube for an expansion valve in which a hunting can be prevented by slowing of a temperature reaction rate of an expansion valve, a ceramic sintered member serving as a heat transfer delay member (3) in a temperature sensing tube (1) is fixed so as not to directly contact with a tubular member (2) by fixing springs (4, 4) provided at both end portions (13, 13), whereby a heat transfer from the tubular member (2) to the ceramic sintered member becomes slow, temperature is not transferred from a mated piping directly via the tubular member, whichever outer surface of the temperature sensing tube 1 contacts with the piping, and a reaction rate with respect to a temperature rise of the expansion valve can be made slow.

Abstract: A temperature monitoring apparatus for high-voltage or medium-voltage components has a transducer which can produce a mechanical signal, which is dependent on the temperature of the component to be monitored. The mechanical signal is transmitted to an electrically isolating transmission element, for example in the form of a rod, and from the transmission element to a movement sensor. The transmission element can be arranged in an electrically isolating hollow body. This arrangement allows the movement sensor to be isolated from high voltages. The apparatus is composed of robust components, and can have a long life.

Abstract: A thermal flow detecting apparatus detects fluid flow in a main flow passage. A bypass passage portion is provided through which some fluid bypasses the main flow passage. A detecting element is provided in the bypass passage portion and arranged at a location eccentrically displaced from the center of a cross section of the bypass passage portion. A throttle portion is provided upstream of the eccentric detecting element in the bypass passage portion for throttling the cross section partially on a side of the detecting element.

Abstract: A thermometer movement comprising a two-part shell and a bimetal coil housed within the two-part shell. The stationary end of the bimetal coil is attached to the rear part of the shell, which is rotatably mounted to the front part. The thermometer movement of the present invention can thus be calibrated by hand, without the need for a tool, merely by manually rotating the rear part of the shell relative to the front part.

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 thermometer includes a housing with a C-shaped window therein and a temperature scale adjacent to the window. A member within the housing has a colored or shaded region with a boundary visible through the window. The colored region is sufficiently large so that it fills the window from the lower side of the temperature scale up to the boundary. The boundary is moved relative to the temperature scale by a bimetal coil spring. The boundary and the colored region indicate the temperature being read by the thermometer. In one version of the invention, the window extends in an arc of about 180.degree., the member is a substantially planar disk, and the colored region is a semi-circular portion of the disk. The disk is mounted within the housing on a shaft, and the disk rotates relative to the shaft. The thermometer is easily readable under a variety of viewing conditions, especially adverse viewing conditions.

Abstract: An analog thermometer of the bimetal coil type has a rotatable hub carrying the bimetal coil. The thermometer is calibrated to indicate exact ambient temperature by rotating the hub to the proper angular position. The hub and the base supporting the hub are designed to allow fabrication as a unitary molded plastic article. A preferred embodiment of this design comprises at least four inwardly projecting tabs carried in an opening in the base and spaced from each other around the periphery of the hole. The hub has at least four outwardly projecting tabs spaced about its periphery. The angles which each of the hub's tabs and the hole's tabs subtend and the tabs' axial positions allow the hub to be rotated to interleave the tabs, restraining the hub in a predetermined axial position and frictionally fixing the hub in the angular position for calibration.

Abstract: A temperature regulating control device and method of making the same are provided, the device comprising a housing, a movable selector unit carried by the housing for selecting a temperature the control device is to tend to maintain, and an ambient temperature sensing means carried by the selector unit for indicating the ambient temperature being sensed by the temperature sensing means.

Abstract: A cap nut and arbor subassembly for an instrument, such as a thermometer, barometer or wind speed indicator, allow an indicator hand to be quickly, positively, and inexpensively held in place. The cap nut and arbor are of plastic, such as high impact styrene, and have an interference fit provided by an elongated projection extending from the cap received within an axially elongated opening in the arbor.

Abstract: A thermometer housing of a generally cylindrical configuration is arranged for floating reception within a bathtub, with the thermometer housing including a top wall divided into a first and second semi-annular indicator surface, with an indicator arrow operative through a bi-metallic spring arranged for deflection from the first to the second indicator surface upon bathtub water elevated to a second zone of temperature to be classified as inappropriate for bathing. A stabilizer weight member is mounted to the bottom wall to maintain alignment and emergence of the housing side wall within the associated bathtub body of water.

Abstract: A universal thermometer movement comprising a casing, a coil support means rotatably mounted within said casing, a bimetal coil element seated within the coil support means with an outer end thereof attached to said coil support means, and an inner end thereof attached to an arbor which projects externally of the casing whereby the temperature sensitive response of the coil element will be transmitted externally of the casing by means of the arbor, and whereby rotation of the coil support means calibrates the movement.

Abstract: A housing for attachment to a space heating appliance and having a terminal assembly receiving a two conductor plug. The terminal assembly is positionable arcuately on the housing and includes a contact closed upon expansion of a bimetallic coil. The coil additionally drives a temperature indicator. A signal generator unit is remote from the first mentioned housing and is in circuit therewith via a two conductor cable.

Abstract: A temperature verification device employs a coiled bimetallic strip having its temperature responsive, rotatable outer end engaged with an indicator flag which is connected with a finger-like projection spaced outwardly from the indicator flag. A stop member is provided in the path of the distal end of the finger-like member and is adapted to engage the distal end when the flag member is moved in one direction, for example, clockwise. Movement of the flag member in the opposite direction can be achieved because the resilient finger-like member will slide past the stop member. All of the structure is confined in a casing having an opening through which the flag indicator may be observed under certain conditions. The stop member can be positioned at any selected location about the periphery of the casing to function as a holding means for the flag indicator at a preselected temperature threshold.

Abstract: The circular crystal of a temperature indicating instrument has a circular flange rotatable in a channel in the instruments' casing. Fingers on the casing have teeth which mesh with teeth on the flange. The fingers yieldably hold the crystal in place but the crystal can be forcibly rotated.The crystal has a slotted post thereon and on said post is a bimetallic spiral coil the inner end of which is in the post's slot. Another post in the casing covers the slot to keep the coil in place on the former post.On the back of the casing is a supporting bracket adjustable to several positions.

Abstract: A system for sensing or detecting changes in and accumulating data relating to variable quantities or conditions, for example temperature, is disclosed. In one instance, the system sensor is a mercury tube thermometer modified with conductors or contacts embedded in the glass walls of the mercury tube. As the temperature rises, the conductive material rises and performs a switching function with the embedded contacts closing an electrical circuit to which the contacts are connected. The circuit components include plurality of logic gates the inputs of which are connected to the switching contacts in a manner such that their outputs are singularly true in a sequence corresponding to the direction of temperature change. In another instance the sensor is a bimetallic strip, coil or thermal Bourdon tube and an arm or pointer needle mounted on an end of the strip or tube rotates in response to changes in the temperature being sensed.

Abstract: A thermally responsive damper for operation in a rectangular ventilation duct.