Abstract: A mobile self-propelled chair includes a frame having at its top a pivotally mounted passenger seat and captively mounting for rotation about various possible axes a relatively large sphere, which supports the principal weight of the chair and user. Auxiliary support is provided by casters surrounding the sphere. The frame has a battery and one or more drive motors for producing rotation of the sphere by drive roller engagement of the sphere surface. Posturally-effected movement of the seat actuates switches to provide power to the motor. Various arrangements allow orienting the axis of rotation of the sphere to cause turning the chair. Thus, both translation and turning movement of the chair is posturally controlled by the user.

Abstract: A space heater incorporating a cabinet having a combustion chamber; there being doors for closing and opening in the front wall of the cabinet which when opened permit front loading of the cabinet for service of the latter as a conventional fire place. With said doors closed, the heater may be used for a thermostatically controlled convection type heater with there being air defining passageways within said combustion chamber for flow about and through a firebox defined by a grate and liner components disposed spacedly from the walls of said cabinet. When used as a convection type heater, introduction of air to the combustion chamber is controlled by a thermostatic element suitably connected to a draft box drawer.