Ruth Handler Ruth Handler Ruth Marianna Handler (née Mosko; November 4, 1916 – April 27, 2002) was an American businesswoman and inventor. She served as the president of the toy manufacturer Mattel Inc., and is best remembered for inventing the Barbie doll, although the doll's design was created by missile engineer-turned-toy designer Jack Ryan. Handler was born as Ruth Marianna Mosko in Denver, Colorado, to Polish Jewish immigrants Ida Mosko (née Rubenstein) and Jacob Mosko. She married her high school boyfriend, Elliot Handler, and moved to Los Angeles in 1938. Her husband decided to make their furniture out of two newfound types
Air handler The blowers in an air handler can create substantial vibration and the large area of the duct system would transmit this noise and vibration to the occupants of the building. To avoid this, vibration isolators (flexible sections) are normally inserted into the duct immediately before and after the air handler and often also between the fan compartment and the rest of the AHU. The rubberized canvas-like material of these sections allows the air handler components to vibrate without transmitting this motion to the attached ducts. The fan compartment can be further isolated by placing it on a spring suspension, which