Abstract: A ceiling fan air freshener diffusion device comprising a scent receptive chamber, a removable drawer for holding a volatile scented medium and a heater for volatilizing the scent medium. The chamber comprises a housing defining a cap for mounting to the hub of a ceiling fan and a continuous sidewall extending downward from the cap. The sidewall defines scent diffusion orifices and a drawer receptive opening. A floor is secured to the housing, abutting the sidewall to seal the housing. An adjustment baffle captivated between the floor and the cap also defines scent diffusion control orifices for regulating diffusion of scent in conjunction with the scent diffusion orifices defined in the sidewall. A tab extending from the baffle through an adjustment slot in the side wall is used to control the aperture defined by the sidewall and baffle orifices together. The preferred embodiment uses a switched resistance heating element located within a base below the floor of the chamber to volatilize the scent medium.

Abstract: An electrical coupling for use in an appliance such as a kettle or hot water jug comprises an inlet in the appliance having a standard pin configuration, but a non-standard profile to prevent a standard connector being inserted therein. A connector for engagement therewith has a standard socket configuration but a non-standard shape to prevent it being inserted in a standard inlet. The polarity of the line and neutral terminals within the connector is reversed with respect to the standard configuration.

Abstract: An immersion heater includes a heating element having a return portion around which is wrapped a thermally conductive link. The link extends through a plastic head and seal member, by which the element is mounted in an opening in a wall of a heating chamber, and has a first portion bent down to cooperate with a bimetallic actuator of a thermally responsive control, which operates in the event that the element overheats. A second portion of the link is bent upwardly, its upper end cooperating with a thermally deformable member of the control which, in the event that the actuator fails to operate, will deform so as to disconnect the power supply to the element.

Abstract: A cordless electrical appliance includes a male pin connector which engages vertically with a female socket connector mounted in a base for the appliance. The contacts are arranged such that one of the line or neutral connections makes last and breaks first. This connection includes a silver, copper backed contact mounted on a leaf spring with a corresponding male pin being made of copper and having a thin silver plating at least in a region of contact with the copper backed contact.

Abstract: Thermostatic control of an electric iron is achieved through utilizing the expansion and contraction of the iron's sole plate relative to a low expansion reference member. In one embodiment, a flexible reference member extends from a fixed mounting at the tip of the sole plate to a switch unit at the rear of the sole plate. The reference number is connected to, and held in tension by, a snap acting actuator within the switch unit, such that as the sole plate expands, the free end of a blade is pulled by the reference member to cause a contact carrying tongue to snap away from a contact to interrupt the power supply. In addition, the temperature of operation may be controlled by varying the effective length of the reference member such as, for example, by deflecting it laterally by a cam member.

Abstract: An improved tram transmission (10) for transferring power produced by a tram motor (54) to a tram crawler chain (66) more efficiently than transmission of prior art. The improved tram transmission (10) includes a motor drive shaft receptacle (12) which is dimensioned for receiving the drive shaft (56) of a tram motor (54). A plurality of cooperating pairs of gears (70) are provided to cooperate with the motor drive shaft receptacle (12) such that the power produced by the motor (54) may be transferred to the crawler chain (66). A plurality of shafts (73) are included to support the gears (70) and are held in place with ball bearings (183). The main shaft (76) carries a hub (158) which includes a plurality of sprockets (166) for engaging the crawler chain (66). A housing (18) is provided for shielding the components (12, 70, and 183) from debris and moisture and for containing lubricant (68) for the gears (70), shafts (73) and bearings (183).

Abstract: A temperature limiting control for an electrical heating appliance such as a ceramic hob comprises switch means (11) and a temperature sensor (10) connnected thereto. The temperature sensor comprises an elongate reference member (12) of ceramic or other low expansion material and an elongate expansion member (13), for example a tape of high chrome steel, relative expansion of the two members operating the switch. The switch (11) and reference member (13) lie to one side of the expansion member (12) so that the latter may be placed closely adjacent the top (2) of the appliance.

Abstract: An apparatus for a game simulating life experiences, comprising in combination, a game board having a main path of successive playing positions is provided with a short-cut path from one side of the main path to the other, and a return path from the short-cut to a position on the main path intermediate the entrance and exit of the short-cut. The disclosed game, by way of example, relates to college experiences and represents the effects which drinking may have on success in college life and graduation therefrom.

Abstract: An electrical connector for a cordless appliance such as a water jug comprises a male pin part 70 mounted to the appliance and a female socket part 81 mounted to a base 90 for the appliance. The forward edge parts 100 of the socket side walls 94 engages with a shroud portion 91 of the male part 70, and the socket side walls 94 have recesses 95. This allows the lateral pivoting of the male part 70 with respect to the female part 81 while still providing for alignment of the terminal pins within the socket apertures 80. This facilitates engagement and disengagement of an appliance from its base without causing bending or stressing of the terminal pins.

Abstract: The present invention relates to installation of orthopedic implants and, more particularly, to a device for locating blind holes in an implanted prostheses so that a screw for interlocking the prosthesis with surrounding bone can accurately be installed.

Abstract: A thermally-sensitive electrical control is mounted to the head of an electric immersion heater of an electric kettle or like container. The control has an outer periphery of less radial extent than the head so as to be passable, during assembly, through an opening in the wall of the associated container such that the head may be positioned in the opening with the control mounted thereto by insertion of the control through the opening from inside the container. The control includes an electric switch and a snap-action, overheat sensing bimetallic actuator disposed on the side of a body portion of the control which faces the head when the control is mounted thereto and a snap-action steam responsive bimetallic actuator mounted to the opposite side of the body portion. The switch is operated by the bimetallic actuators through an over-center mechanism disposed on the opposite side of the body portion and connected to the switch by a U-shaped link slidbly mounted in the body portion.

Abstract: An electrical interconnector, e.g. a male pin plug, comprises electrical connector members and associated terminals which are formed from sheet metal. The terminals include at least one (1) tooth adapted to pierce the insulation to make contact with the conductors of a multi-strand cable when the cable is forced into a groove which is sized and shaped to function as a trap which captures and guides the cable.

Abstract: A switch unit for an electric immersion heater for mounting on the wall of a liquid heating vessel, the switch unit including thermally responsive means sensitive to boiling liquid on a body of the switch unit in a position for exposure to vapor emerging from the vessel, the thermally responsive means comprising a snap-acting bimetallic actuator. An overcenter spring mechanism couples the bimetallic actuator to a movable contact of an electrical switch for opening and closing the switch, the overcenter spring mechanism being movable between a first position in which the switch is closed and power can be supplied to the immersion heater and a second position in which said switch is open for interrupting the supply of power to the immersion heater.

Abstract: A thermally-responsive electrical control for an electric heater of a water boiling container includes a switch-on-dry protector switch unit electrically connected with the cold leads of the heater and having a thermally sensitive switch means effective, in use, to interrupt the electrical supply to the heater should the element overheat through being switched-on when the container is dry. A removable steam-sensitive unit is mounted on the protector switch unit and includes an overcenter spring mechanism and a thermally-responsive actuator for the mechanism. The actuator of the said steam sensitive unit is arranged to impinged by vapor or steam issuing from the outlet of a passage leading to the interior of the container, and the electrical parts of the control are shielded from such vapor or steam.

Abstract: An electrically heated container for boiling liquids is provided with a thermally sensitive electrical control including a switch-on-dry protector switch unit directly connected with the cold leads of an electric heating element located externally of the container and in contact with the bottom wall thereof. The protector switch unit includes a thermally sensitive switch means enclosed in a protective housing having projecting terminal pins engageable by a female socket connector. The protector switch unit is mounted on a thermally conductive mounting plate located externally of the container and in contact with the heating element. The plate is enclosed by a detachable base member on the container. A steam-sensitive switch unit is mounted on the protector switch unit and includes a thermally sensitive element arranged to be impinged by steam produced by liquid boiling in the container and mechanically coupled to the switch means of the protector switch unit for deenergizing the heating element.

Abstract: A conveyor gathering systems suitable for use with a continuous narrow seam mining machine is disclosed. The system is a single continuous conveyor extending from the auger or cutting head to the rear or discharge end of the machine and is particularly useful with a dozer gathering head. Conveying of the mined material is achieved by an endless conveyor comprised of "flight bars" attached at each end to two drive chains. The single continuous conveyor is driven from the rear of the mining machine, may pivot up and down, and makes a very small diameter, 180 degree turn around, at the front of the mining machine adjacent the auger or cutting head. Because the conveying system uses a single continuous system of flight bars, the tensions on the conveyor can be significantly reduced such that the conveyor drive motor can be selected having a work capacity less than one half of other systems.

Abstract: A thermally responsive electric switch for protecting electric motors comprises two sheet metal switch terminal members, one switch member having ear portions deformed around the other switch member to secure the switch members together. An intervening strip of insulation maintains electrical isolation between the two switch members and may be impregnated with adhesive to bond the switch members. One switch member mounts a thermally responsive bimetallic actuator carrying a movable contact and the other mounts a fixed contact. The fixed contact projects through an aperture in the insulation, such aperture registering with an aperture in the switch member carrying the movable electrical contact so that the electrical contacts engage by way of the registering apertures; thus the contacts are disposed in a protected position. Interengaging recesses and dimples may be provided in the switch members to prevent relative rotation therebetween.

Abstract: A snap-acting thermally responsive actuator comprises a bimetal sheet having a U-shaped aperture defining a tongue, the sheet having been deformed to a domed configuration in a die pressing operation so that the actuator reverses its curvature with a snap-action with changes in temperature. The actuator may carry an electrical contact and have sufficient resistance so that current through the actuator heats the actuator to its operating temperature. The electrical resistance may be increased by forming additional apertures in the actuator.

Abstract: A method of forming a snap-acting thermally responsive bimetallic actuator comprising forming, from sheet bimetal, a member having an aperture with an arcuate outer perimeter and an inner perimeter defining a tongue free at one end, said free end being close to the outer perimeter, the outer and inner perimeters smoothly merging at rounded ends of the aperture adjacent the tongue root, and the radial width of the member at the tongue root being substantially greater than the width opposite the free end of the tongue. The formed member is thereafter pressed between a die shaped to a domed configuration and an incompressible rubber pad to impart a domed configuration to the member.

Abstract: An electric switch comprising an insulative body, a pair of electrical terminals mounted on flat portions of one side of the body member, the terminals having ear portions crimped about portions of the body to mount the terminals to the body while providing some resilience in the mounting. One terminal mounts a stationary switch contact and the other terminal mounts a thermally responsive bimetallic snap-acting actuator carrying a movable switch contact.