Abstract: A process for polymerization of vinyl chloride may include contacting vinyl chloride, demineralized water, at least one stabilizer agent, at least one dispersing agent, an initiator and optionally one or more comonomers; continuously feeding the vinyl chloride, demineralized water, at least one stabilizer agent, at least one dispersing agent, an initiator and optionally one or more comonomers into a tubular reactor having a length of at least 20 times an internal diameter of the tubular reactor; and continuously polymerizing the vinyl chloride, and optionally the one or more comonomers.

Abstract: A winch includes a reversible electrical motor with output shaft which drives a drum through a drive mechanism with multiple sprockets and gears to take up and let out a cable. The output shaft is connected through a one-way bearing to a brake hub. The brake lining on a brake arm is spring biased into engagement with the hub and prevents reverse rotation of the output shaft unless an electrical switch actuator is moved to a reverse position, camming the brake arm out of braking relationship with the hub. The drive mechanism may also be powered manually in the forward direction. If free-wheeling of the drum is desired, a knob is rotated to disconnect a clutch in the drive mechanism.