Abstract: An extracorporeal blood processing system is disclosed which includes a variety of novel components and which may be operated in accordance with a variety of novel methodologies. For instance, the system includes a graphical operator interface which directs the operator through various aspects of the apheresis procedure. Moreover, the system also includes a variety of features relating to loading a blood processing vessel into a blood processing channel and removing the same after completion of the procedure. Furthermore, the system also includes a variety of features relating to utilizing a blood priming of at least portions of the apheresis system in preparation for the procedure. In addition, the system includes a variety of features enhancing the performance of the apheresis system, including the interrelationship between the blood processing vessel and the blood processing vessel and the utilization of high packing factors for the procedure.

Abstract: Briefly, according to the invention, the interface device comprises matching device (20 and 22) for coupling a duplex information signal (21 and 23) to a simplex or a duplex radio (6) which provides a corresponding information signal (27) acknowledged by the half duplex or full duplex radio (6). Additionally, a signal detecting means (24) determines a desired signal strength and controls an interrupt signal (32). A means for sending (26) the interrupt signal (32) to the radio (6) sends the interrupt signal once the signal detecting means detects the desired signal strength. Finally, the interface device of the present invention comprises a means for sending (26) the corresponding information (27) once the interrupt signal is sent.

Abstract: A radio (100) transmits and receives encrypted signals having unencrypted key identifiers, allowing other radios having the corresponding key identifiers and encryption keys to communicate with radio (100). Prior to transmitting an encrypted message, radio (100) selects a unique key identifier automatically and uses the corresponding encryption key to encrypt the message that will be transmitted. Radio (100) transmits the key identifier in an unencrypted format with the encrypted message in order to allow other radios to determine the encryption key used in encrypting the message. When receiving an encrypted message, radio (100) uses the predetermined process stored in the radio (100) to properly select the proper encryption key for use in decrypting the incoming message.

Abstract: A trunked communication system (400) transmits and receives encrypted signals over the system control channel (402). The trunked system (b 400) includes a plurality of radios (300) which can communicate with the communication system via control channel (402). By using control information signals and system information signals radios (300) can determine if it they are capable of decrypting the encrypted control information signals sent over the control channel (402). This is done by first determining if the encryption identification field found in the unencrypted system information signal matches an encryption identification field found in radio (300). If a match is found between the radio's encryption identification and the encryption identification field in the system identification signal radio (300) loads the encryption into the encryption circuitry in order to successfully decrypt the control information signals.

Abstract: An epicyclic speed reducing transmission including first and second sets of conjugate races and first and second sets of rollers disposed between races of the first and second sets utilizes rollers and races which are sized such that a first radial clearance between the rollers and the races which include a stator race exceeds the radial clearance between the second set of rollers and races which includes an output race so that the radial load handled by the first and second sets of rollers is equalized when the rollers are loaded by an eccentric cam utilized for orbiting one of the races of each set of conjugate races.

Abstract: A sealed joint assembly interconnecting links of crawler tractor track chain includes an annular sealing member made of relatively rigid abrasion resistant material formed to define contiguous axially and radially extending bands, the sealing member thus being generally right angular in cross section. The radially extending band includes a pair of surfaces which converge axially to form an annular edge which engages an end surface of a track bushing and is in fact biased theretowards by means of an annular compressive load member made of resilient relatively pliant material of generally rectangular cross section loaded predominantly in compression between the bottom of a counterbore of one of the links and the sealing member. A spacer ring is located radially inwardly of the axially extending band of the sealing member and augments the band in restraining radially inward expansion of the load member.