Abstract: One variation of the tile display includes a set of tile assemblies, each tile assembly includes: a base plate; a tile panel; a tile interface; and a set of linear actuator assemblies arranged in a radial pattern about the base plate and cooperating to constrain the tile panel in angular roll, linear heave, and linear sway motion relative to the base plate. Each linear actuator assembly includes: a bearing housing defining a linear bearing, a floating bearing, and a through-hole; an actuator mounted to the bearing housing; a distal link coupled to the tile interface; a first support boom running through the linear bearing; a second support boom running through the floating bearing; and a driven boom running through the through-hole of the bearing housing. Each tile assembly also includes a primary controller configured to maneuver tile panels over ranges of angular pitch, angular yaw, and linear surge positions.

Abstract: An extendable-retractable pet leash includes a housing with a spring-actuated take-up reel. A personal protection device is mounted on the housing and can comprise, for example, an extendable-retractable knife, a taser or a siren. The housing also mounts a light for illuminating a surrounding area. The leash, personal protection device and light can all be operated by actuators mounted on the housing for convenience, one-handed operation.

Abstract: One variation of the tile display includes a set of tile assemblies, each tile assembly includes: a base plate; a tile panel; a tile interface; and a set of linear actuator assemblies arranged in a radial pattern about the base plate and cooperating to constrain the tile panel in angular roll, linear heave, and linear sway motion relative to the base plate. Each linear actuator assembly includes: a bearing housing defining a linear bearing, a floating bearing, and a through-hole; an actuator mounted to the bearing housing; a distal link coupled to the tile interface; a first support boom running through the linear bearing; a second support boom running through the floating bearing; and a driven boom running through the through-hole of the bearing housing. Each tile assembly also includes a primary controller configured to maneuver tile panels over ranges of angular pitch, angular yaw, and linear surge positions.