Abstract: A grinder having a grinding structure and a sizing screen is disclosed herein. A top cover covers the grinding structure. The sizing screen can be removed from the grinder by opening the cover, and lifting the sizing screen through the opening left by the cover.

Abstract: A grinder having a grinding structure and a sizing screen is disclosed herein. A top cover covers the grinding structure. The sizing screen can be removed from the grinder by opening the cover, and lifting the sizing screen through the opening left by the cover.

Abstract: A method and apparatus are disclosed for using a specified pattern of signal events for signaling in a digital communication system. Illustratively, detection of a first event in a control signal activates timing apparatus which looks for a second event in a control signal within a specified time "window" and at least one additional event in either a data or a control signal within a specified time period. Preferably, the first event is a drop in one of the carrier detect or request to send signals and the second event is a rise in the same signal. The additional event illustratively is reception of two identical data characters, each representing an address and an operation code. Each of these two characters must be received and compared for verification within the specified time period in order to produce an output control signal decoded from the operation code.