Abstract: In order to provide a pre-assembled, relocatable building structure which can be transported by road from one site to another, a metal skeleton which is formed of 6.times.2 inch rectangular cross-section hollow steel tubing, is welded together and provided with horizontally extending anchor brackets at the bottom of each vertically extending column member. These anchor pads allow the building to be lowered onto foundations in which anchor bolts are imbedded, and bolted in place. The foundations are formed so as to take the form of continuous elongate footers which break the passage of wind which tends to flow sideways under the housing structure. A shallow crawl space can formed between the foundation footers to facilitate service connections. To prevent winds from tearing off side and roof panels of roof and wall structures secured to the skeleton, metal brackets are used to enclose or encapsulate the edges of the panels in a manner which prevents the direct contact with the wind.

Abstract: An apparatus for laterally removing a workpiece, such as a guide roller on an endless track vehicle or motor from a piece of heavy equipment, from a space having limited vertical access. The apparatus includes a base for stably supporting the apparatus in a position laterally adjacent the workpiece, a support member secured to the base, a pivotable frame member pivotally secured to a portion of the support member, a cradle member for receiving and supporting the workpiece, which cradle member is secured to the pivotable frame member to be raised and lowered as the pivotable frame member is pivoted, and a force actuator, such as a hydraulic cylinder, supported by the support member and connected to the rigid pivotable frame member for pivoting it to raise and lower the cradle member as the force actuator is extended and retracted between its extended and stowed positions.

Abstract: A stabilizing arrangement for mine roof support systems of the type in which a series of support units, each including a transverse beam supported at opposite ends by extensible props, are interconnected by extensible struts in a manner to be self-advancing by alternate retraction of support units from a roof supporting condition and extension of the struts to advance such retracted units relative to others of such units which are in an extended roof engaging condition. The connection of each prop to the beam in a given unit is pivotal to allow deflection of the beam and props of a supporting unit from a normal perpendicular relationship under load. The stabilizing means restores the props and beam to a normal perpendicular relationship for advancing movement of each support unit.

Abstract: An improved footrest on a surf-type single ski has a plurality of skid-resistant, generally L-shaped members, one positioned in front and the other behind the center line of the ski for receiving the feet of the skier in a readily removable relationship, preferably normal to the transverse axis of the ski. The ski member includes a longitudinal axis, a narrow width, a generally planar intermediate portion, a front portion extending mildly upwardly and inwardly from the intermediate portion to a front end, the intermediate portion and the front portion having a substantially rectangular cross section transverse to the longitudinal axis. The foot receiving L-shaped members include a plurality of recesses along the length thereof for accommodating snow and serving to clean the boot of the user. In an alternative embodiment, a ski of the type described has a metallic plate base member for sking on sand. An improved handle member may be provided.

Abstract: An articulating coupling for connecting two wheeled vehicles includes a pivot connection and a tilt mechanism. The pivot connection is provided between the two vehicles so that they can turn relative to each other in the horizontal plane and be selectively turned relative to each other. The tilt mechanism includes a horizontal pivot connection between the two vehicles so that vertical movement of at least a portion of one vehicle adjacent to the horizontal pivot connection will move a portion of the other vehicle adjacent to the pivot connection in the same direction and cause the other vehicle to pivot about the axis of its wheels.

Abstract: An articulated tractor and load-carrying trailer mine shuttle car has a low profile, the tractor having a cockpit in which the operator sits transversely of the tractor and with his head above the top of the tractor so that by turning his head he can look forwardly and backwardly, the shuttle car being designed to operate in both directions. To protect the operator from falling pieces of minerals or coal, a transversely sliding canopy is provided the tractor, the canopy being spaced above the tractor's top to form front and back spaces through which the operator can look, and being transversely slidable to permit the operator to get into and out of the cockpit by sliding the canopy from over the top of the cockpit.