Abstract: A sanitary refuse device for collecting waste products such, for example, as the droppings of dogs, cats, and other animals. A hollow, cane-like, substantially vertical handle has a pistol-type grip at its upper end and a pair of normally open, spring-biased, pick-up jaws at its lower end, one of the jaws being fixedly connected to the lower end of the handle and the other jaw being pivotally mounted so as to swing to and from the fixed jaw. A trigger in associated relation with the piston-type grip is connected to the pivoted jaw through the medium of an actuating rod which passes through the handle and normally exists under compression in order to maintain the pivoted jaw in its open position against the action of the associated spring. Retraction of the trigger places the actuating rod under tension so that it becomes a pull rod and causes the pivoted jaw to swing towards the fixed jaw into a closed position.

Abstract: An unslotted radio frequency multiple access bus communications system employing a contention listen-while-talk (LWT) protocol. The system includes a plurality of remotely located terminals coupled to a communications bus. The bus includes a pair of oppositely directed, unidirectional signal paths which are connected at one end so that one path is an inbound path to that end and the second is an outbound path from that end. Each of the remote terminals includes a bus interface unit (BIU) coupled to both the inbound and outbound paths at the remote location. Each BIU is adapted to transmit and receive modulated carrier signals on the inbound and outbound paths, respectively.When a terminal wishes to send a message to another terminal, the terminal's BIU initially performs an rf carrier sensing operation to make an initial determination as to whether or not any other subscriber is transmitting on the inbound path.