Abstract: A carousel ride system includes a first rotatable platform and multiple second rotatable platforms. Each second rotatable platform of the multiple second rotatable platforms is positioned within a respective opening in the first rotatable platform. A first drive system is configured to drive rotation of the first rotatable platform and multiple second drive assemblies are configured to drive rotation of the multiple second rotatable platforms. Multiple figures extend over the multiple second rotatable platforms and multiple figure drive assemblies are configured to independently lift and rotate the multiple figures relative to the multiple second rotatable platforms. One or more processors are configured to coordinate operation of the first drive system, the multiple second drive assemblies, and the multiple figure drive assemblies to maintain the multiple figures in a forward-facing orientation relative to a direction of travel of the first rotatable platform during operation of the carousel ride system.

Abstract: A security cover for a coin-operated car wash machine is rectangular and slides over a car wash machine. It has a partial front panel that covers the coin drawer of the car wash machine. A bar extends through the machine and through a slot in each of the side panels of the security cover. Each end of the bar extends slightly beyond the side panels of the security cover and each end has an opening through which a padlock could extend to deter theft and vandalism.

Abstract: The vibration of an end mill (36) is sensed by either microphones (42, 44, 46) or accelerometers (78, 80, 82). A time domain signal is produced by these sensors which is converted into a near-real time frequency spectrum. A certain frequency band in the spectrum is directly related to end mill vibration and certain frequencies in the band will change in amplitude corresponding to certain types of end mill wear. When any of the amplitudes in the band exceed a certain threshold limit the end mill is known to be dull.