Abstract: Over the years, batons have not changed much in size or shape. The ends of the baton are still rubber with a steel shaft in between. Little has been done to prevent the baton from slipping out of the twirler's fingers due to moisture or to keep the baton from rolling away when dropped. The primary essence of this patent is to reduce rolling action and bounce when dropped as well as slippage due moisture. This patent introduces a newly designed ball and tip that is in the general shape of a tetrahedron that transitions into a frustum shape that connects the ends to the shaft. The functional shape of baton ends appears to be an equilateral triangle when viewed looking down the axis of the baton shaft. The effect of this design is that three flat surfaces on each end of the baton are oriented so that the flats are in the same plane with each other, which creates resistance to rolling.

Abstract: A transpiration air cooled combustor assembly for a gas turbine engine includes an annular liner of laminated metal with an inner sheet and an outer sheet having a plurality of mechanically formed holes therein on either side of a mechanically pressed waffle patterned core sheet with offset depressings and dimples on either face thereof; the dimples have raised lands bonded to the inner and outer sheets; small cross passages are drilled in the core sheet so that the margins of the cross passages are located in spaced relationship to the land surfaces thereby to prevent burr formation disruption of the bond joints; the core sheet has a total metal mass equivalent to the orginal metal mass prior to press displacement of metal to form the depressions and dimples therein except for the metal removed by formation of the cross passages which communicate offset depressions on opposite sides of the core sheet to form a tortuous intercommunicating flow path through said annular liner between holes in the inner and out