Abstract: A cat litter box of the pass through type which includes a tray on which the litter is deposited with the tray having openings in the base for the passage of liquid wastes into a sump or other means for the collection of liquid waste separate from the litter, a convenient means for releasing the collected liquid and means for reducing the release of odors from the collected liquids and residues which cling to the litter. The box is used with litter of a granular type that sheds liquids, and mitigates odor from residues and liquids which have been shed.

Abstract: A cat litter box includes a tray on which the litter is deposited with the tray being inset within a base having inwardly converging bottom walls defining a sump for the collection of liquid waste. A valve is carried by the bottom walls and has a control rod extending outwardly through a base skirt to receive a handle. The litter is of a nonabsorbent type having a smooth exterior surface to facilitate cleaning. The base supports the tray both for cleaning when in place on the rim of a toilet bowl and when on a floor surface.

Abstract: A computer interconnect coupler has channel transmitters and channel receivers and logic circuitry for the routing of messages from the channel receivers which are addressed to the channel transmitters. When a message is received by a channel receiver, the channel receiver stores the beginning portion of the message in a first-in-first-out buffer, and sends a route message request to central switch logic. If the destination transmitter or receiver is busy, the central logic places the message request on a destination queue and returns a signal to the requesting source transmitter to turn on a flow control signal which is transmitted back to the data processing device having originated the message. Any message addressed to this data processing device, however, is inserted into the flow control carrier with pauses both before and after the message, and provisions are also made to allow the data processing device to return an acknowledgment responsive to the incoming message.

Abstract: A computer interconnect coupler has channel transmitters and logic and channel receivers and logic circuitry for the routing of messages from the channel receivers which are addressed to the channel transmitters. When a message is received by a channel receiver, the channel receiver stores the beginning portion of the message in a first-in-first-out buffer, and sends a route message request to central switch logic. If the destination transmitter or receiver is busy, the central logic places the message request on a destination queue and returns a signal to the requesting source transmitter to turn on a flow control signal which is transmitted back to the data processing device having originated the message. Any message addressed to this data processing device, however, is inserted into the flow control carrier with pauses both before and after the message, and provisions are also made to allow the data processing device to return an ackowledgement responsive to the incoming message.

Abstract: The reliability of a complex electronic system such as a computer interconnect coupler is enhanced by providing diagnostic capabilities in the system so that internal faults will be quickly diagnosed and repaired. To facilitate the repair process and enhance the likelihood that a defective circuit board will be properly repaired before being re-installed, pertinent internal diagnostic information about the defective circuit is stored in a nonvolatile memory on the circuit board for the defective circuit, so that the information will be physically carried to the repair facility along with the defective circuit.

Abstract: A computer interconnect coupler has channel transmitters and channel receivers and logic circuitry for the routing of messages from the channel receivers which are addressed to the channel transmitters. When a message is received by a channel receiver, the channel receiver stores the beginning portion of the message in a first-in-first-out buffer, and sends a route message request to central switch logic. If the destination transmitter or receiver is busy, the central logic places the message request on a destination queue and returns a signal to the requesting source transmitter to turn on a flow control signal which is transmitted back to the data processing device having originated the message. Any message addressed to this data processing device, however, is inserted into the flow control carrier with pauses both before and after the message, and provisions are also made to allow the data processing data to return an acknowledgment responsive to the incoming message.