Abstract: A shell (1) for a prosthetic joint to be driven into a bone substance. The shell having an outer lateral surface (4) which is convexly curved in cross section and on which a plurality of ribs (5) is arranged. All ribs extend in the same direction at a preferably increasing gradient angle of 45° to 85° at the equatorial end (6) to a pole-side end (7). The cumulative flank projection area of all ribs (5) corresponds to at least a fifth of the entire outer lateral surface. As a result of this measure, a very high primary stability is achieved once the shell has been driven in, the shell being screwed into the bone substance very precisely and without bone material being sheared off. This arrangement can also be applied, similarly, to a concavely curved inner lateral surface.

Abstract: A gaming machine operable under control of a processor includes a processor for controlling the gaming machine, an interface in electronic communication with the processor and at least one set of primary reels displayed at the interface, the set of primary reels having a plurality of symbols. The gaming machine also includes at least one set of secondary reels displayed on the interface. The secondary reel has a plurality of symbols and an intersecting region. The intersecting region intersects a portion of the at least one set of primary reels. Preferably the gaming machine has four sets of primary reels having corners and a single set of secondary reels that overlaps at least one corner of each of the sets of primary reels. The sets of reels can include physical, electronic or otherwise simulated sets of reels.

Abstract: A gaming machine operable under control of a processor includes a processor for controlling the gaming machine, an interface in electronic communication with the processor and at least one set of primary reels displayed at the interface, the set of primary reels having a plurality of symbols. The gaming machine also includes at least one set of secondary reels displayed on the interface. The secondary reel has a plurality of symbols and an intersecting region. The intersecting region intersects a portion of the at least one set of primary reels. Preferably the gaming machine has four sets of primary reels having corners and a single set of secondary reels that overlaps at least one corner of each of the sets of primary reels. The sets of reels can include physical, electronic or otherwise simulated sets of reels.

Abstract: A gaming machine operable under control of a processor includes a processor for controlling the gaming machine, an interface in electronic communication with the processor and at least one set of primary reels displayed at the interface, the set of primary reels having a plurality of symbols. The gaming machine also includes at least one set of secondary reels displayed on the interface. The secondary reel has a plurality of symbols and an intersecting region. The intersecting region intersects a portion of the at least one set of primary reels. Preferably the gaming machine has four sets of primary reels having corners and a single set of secondary reels that overlaps at least one corner of each of the sets of primary reels. The sets of reels can include physical, electronic or otherwise simulated sets of reels.

Abstract: A gaming machine having a standard game play mode and a bonus feature play mode that include winning and non-winning reel set spins. The gaming machine includes a housing having a user interface and a display attached to the housing to enable games having standard and bonus game play modes. Standard game play mode displays a matrix of symbols including scatter symbols. The gaming machine evaluates scatter symbols in the matrix, whereby appearance of a predetermined number of scatter symbols in the matrix triggers bonus feature play mode and initializes a win chain counter. During bonus game play mode a winning reel set spin enables a new reel set spin while leaving the value of the win chain counter unchanged and a non-winning reel set spin decrements the win chain counter. When the win chain counter reaches a threshold value then bonus game play mode terminates.

Abstract: A gaming machine having a standard game play mode and a bonus feature play mode that include winning and non-winning reel set spins. The gaming machine includes a housing having a user interface and a display attached to the housing to enable games having standard and bonus game play modes. Standard game play mode displays a matrix of symbols including scatter symbols. The gaming machine evaluates scatter symbols in the matrix, whereby appearance of a predetermined number of scatter symbols in the matrix triggers bonus feature play mode and initializes a win chain counter. During bonus game play mode a winning reel set spin enables a new reel set spin while leaving the value of the win chain counter unchanged and a non-winning reel set spin decrements the win chain counter. When the win chain counter reaches a threshold value then bonus game play mode terminates.

Abstract: A gaming machine has a standard game play mode, and a bonus feature game play mode. The bonus feature mode includes a win chain counter having an integer value. During standard game play mode, the user interface randomly displays a matrix of symbols and the computer calculates the wins based on the matrix of symbols. On appearance of a predetermined number of scatter symbols, bonus feature play commences and a the win chain counter is initialized. During bonus feature play, a winning spin initializes a first win chain, and a first non-winning spin decrements the win chain counter value, after a first win chain is initialized, and prior to a non-winning spin, winning spins are added to the first win chain. Subsequent win chains are generated and terminated by a non-winning spin until the win chain counter is decremented to zero. Then bonus feature game play terminates.

Abstract: A gaming machine operable under control of a processor includes a processor for controlling the gaming machine, an interface in electronic communication with the processor and at least one set of primary reels displayed at the interface, the set of primary reels having a plurality of symbols. The gaming machine also includes at least one set of secondary reels displayed on the interface. The secondary reel has a plurality of symbols and an intersecting region. The intersecting region intersects a portion of the at least one set of primary reels. Preferably the gaming machine has four sets of primary reels having corners and a single set of secondary reels that overlaps at least one corner of each of the sets of primary reels. The sets of reels can include physical, electronic or otherwise simulated sets of reels.

Abstract: A gaming machine operable under control of a processor includes a processor for controlling the gaming machine, an interface in electronic communication with the processor and at least one set of primary reels displayed at the interface, the set of primary reels having a plurality of symbols. The gaming machine also includes at least one set of secondary reels displayed on the interface. The secondary reel has a plurality of symbols and an intersecting region. The intersecting region intersects a portion of the at least one set of primary reels. Preferably the gaming machine has four sets of primary reels having corners and a single set of secondary reels that overlaps at least one corner of each of the sets of primary reels. The sets of reels can include physical, electronic or otherwise simulated sets of reels.