Abstract: A braking device including a chamber rotatably mounted on an axle, the chamber defining an inner cavity, a disc mounted on the axle in the inner cavity, the disc having opposing surfaces extending away from the axle, and a pourable material disposed in the inner cavity such that rotation of the chamber imparts a centrifugal force to the material, causing the material to be wedged between an inner surface of the inner cavity and the opposing faces so as to apply a braking force to the disc.

Abstract: A method including placing an order of at least one shop selected item with a shop, the at least one shop selected item including a purchasable item that a consumer relies on the shop to select from a group of mutually equivalent items without the consumer having to see and select the purchasable item, and going to the shop and choosing at least one personally selected item, the at least one personally selected item including a purchasable item that a consumer does not rely on the shop to select.

Abstract: Rescue apparatus including a track mounted vertically on an outside surface of a building, a pulley mounted on the building above the track, a non-rescue-grade guide cable arranged for moving along the track, an upper end of the guide cable engaging the pulley, and release apparatus for arresting downward movement of the upper end of the guide cable and for selectively releasing the upper end of the guide cable so as to permit downward movement of the upper end of the guide cable.