Abstract: A cooking apparatus including an eye level range includes a vent system for exhausting heated air and providing cooling a range electrical control components. A manual off, low, high selector switch is operable to operate a blower fan motor. A thermostat switch is provided for sensing a high temperature adjacent a compartment housing the electrical controls of the range unit in order to automatically turn the fan on to its high speed when a preselected high temperature is sensed.

Abstract: There is disclosed herein a telescoping mast assembly adapted for use with drill rigs and the like. The mast assembly comprises multiple sections, said sections being adapted for nesting one within the other in the telescoped-to-the-closed condition and each section comprising mutually convergent corner leg members which, when said mast assembly is extended, form concentric and in-line arrangements of the corner leg members from the base to the crown of the mast. Means are provided for connecting each mast section to its neighboring mast section upon extension thereof. In addition, means are also provided for indexing of the connector means upon extension of the mast assembly from its telescoped-to-the-closed condition.

Abstract: There is disclosed herein a mobile well drilling rig apparatus adapted for rapid assembly and disassembly thereof. The drilling rigs of the invention comprise a trailerable telescoping mast assembly and a separate sectionable substructure assembly therefor comprising a rig base, a working floor mounted in spaced relation above the base and a rig base extension extending outwardly from the drawworks side of the rig base. In a preferred embodiment, rail means defining a mastway are provided between the erected working floor and the rig base extension. The base mast section of the telescoping mast assembly is provided with cooperative mast roller means whereby the base of the mast structure is readily conveyed to the working floor and whereby the drawworks side mast legs are engaged into a trunnion arrangement therefor. Means are also provided for raising of the mast structure to the vertical from the drawworks side of the rig.