Abstract: A variable speed pulley assembly (10) for use with a drive belt (30) having a V-shaped cross-sectional configuration for transmitting driving force to the pulley assembly and a driven belt (32) having a V-shaped cross-sectional configuration for transmitting force driving force from the pulley assembly. The pulley assembly (10) includes a plurality of pulley halves (90-98) which are welded to a constant diameter portion (62) of a shaft (50). The shaft (50) rotates about its axis (44) to enable the pulley halves (90-98) to rotate. A sleeve (120) on the constant diameter portion (62) of the shaft (50) is movable axially in opposite directions along the shaft. The center pulley (94) is fixed for rotation with the sleeve (120). The first ratio of the length of the sleeve (120) to its diameter is at least 1 to 1. The ratio of the outer diameter of the drive belt (30) on its pulley, to the first ratio, is preferably less than 4 to 1.

Abstract: An apparatus is disclosed for automatically programming and controlling an oven, such as a food oven. The oven and its controller can be remotely operated over great distances by using a personal computer having a modem, and transmitting and receiving bidirectionally over a telephone interconnection, to display the cooking progress, modify a cooking sequence or prepare a new program sequence. An ergonomically designed operating panel provides an interactive intuitive method of programming the desired cooking sequences. Switch selections are monitored by a microprocessor which branches to the various preprogrammed functions. In addition, self-analysis and self-diagnostics aid the user in displaying a walk-back of the stored times and temperatures that occurred during an operating cycle before a power outage. A novel integrated oven design conserves the floor space and exhaust fan floor installation and operating costs.

Abstract: A variable speed pulley assembly for use with V-shaped drive and driven belts include a center pulley supported for rotation and movable axially in opposite directions between an outer drive pulley half and an outer driven pulley half. The center pulley comprises an inner drive pulley half and an inner driven pulley half fixed for rotation with each other. The inner drive pulley half has a first surface presented at an angle to an inner surface of the outer drive pulley half to define between them a drive pulley groove. The drive belt is received in the drive pulley groove and is movable radially in the drive pulley groove between a radially innermost position and a radially outermost position. The inner driven pulley half has a second surface presented at an angle to an inner surface of the outer driven pulley half to define between them a driven pulley groove.