Abstract:
Ink jet print head (10) and method of controlling the flight path of ink droplets ejected therefrom. The print head includes a body portion (12) through which at least one ink conduit (34) is arranged to extend, ending in a nozzle (46) through which ink droplets (48) are ejected. The body portion incorporates a resilient portion (14) which can be deformed so as to bring about a tilting movement of the nozzle thereby to change the flight path of the ejected droplets. The tilting of the nozzle and the control of the flight path of the droplets is achieved in a simple manner without the requirement of complex deflecting electrodes positioned externally of the head between the nozzle and the record medium.
Abstract:
Un circuit controleur integre (18) est utilise pour connecter une unite de traitement centrale (21) par l'intermediaire d'une logique d'interface de bus (20) a une pluralite de dispositifs a distance en utilisant deux canaux de communication (1, 2) pour commander leur fonctionnement. Une memoire tampon de sortie (30) recoit des donnees sous forme parallele provenant de l'unite de traitement par ce bus et un registre d'emission serielle (40) transmet ces donnees sous forme serielle aux dispositifs a distance. Un registre de reception serielle (50) recoit les donnees serielles provenant des dispositifs a distance et un tampon d'entree (54) transmet ces donnees a l'unite de traitement sous forme parallele. Des circuits de commande de synchronisation (44, 46), des logiques de commande (36), un registre de mode (70), un registre d'etat (72) et un registre de commande (75) sont inclus dans le circuit controleur pour effectuer les diverses fonctions associees a celui-ci.
Abstract:
A buffer memory system for effecting parallel transfer of data between an eight-bit processor (5) and a large continually recirculating serial memory (7) includes a 1024 word by 20 bit static random access memory (RAM) (11). Twenty data terminals of the serial RAM (7) are coupled by means of first bi-directional driver circuitry (19) to corresponding terminals of the static RAM (11). Three groups of the data terminals of the static RAM (11) are sequentially multiplexed onto a data bus of the processor (5). Control circuitry responsive to control signals produced by the processor (5) and the serial memory includes first (37), and second (27) counters, outputs of which are applied to the static RAM (11) to enable the processor (5) to write information into and read information out of the static RAM (11) and to enable the serial memory (7) to write information into and read information out of the static RAM (11).
Abstract:
Dot matrix printer, such as an ink jet printer, wherein the dots produced by a printing element (20) are optically sensed and the existence, the position, the size and the condition of each dot are determined. The desired printing signals are produced by a character generator (36) and input in a signal shaping circuit (42) and these signals are compared with the actual signals from the optical sensing means (22, 48, 50) and the drive means (34) for the printing element (20) is altered to correct the printing or an alarm signal (54) is produced when the compared signals do not correspond with each other.
Abstract:
Un connecteur electrique (1) pour une plaque a circuits imprimes (16) permet d'exercer une faible force d'insertion tout en obtenant une grande force de contact. Le connecteur (1) comprend une pluralite de broches elastiques electriquement conductrices (18) et un support dans lequel sont montes des leviers conducteurs (21) qui cooperent avec les broches (18). Une plaque (16) inseree dans le connecteur engage le support (22) amenant ainsi des premieres extremites des leviers (21) en engagement avec des points predetermines (45) sur les contacts des bords (26) de la plaque (16). Au fur et a mesure que la plaque (16) est introduite, les broches (18) sont deflechies pour maintenir les premieres extremites du levier (21) en engagement avec les points predetermines (45) avec une force de contact elevee mais avec une faible force d'introduction. Les leviers (21) ont des extremites pointues et peuvent percer tout revetement d'oxyde pouvant se former sur les contacts des bords (26).
Abstract:
Apparatus for controlling the operation of a memory device (34) is effective to prevent unauthorized utilization of the memory device (34) upon removal thereof. A memory energizing signal (84) is delayed, the delayed signal being provided to logic means which produces an enabling signal (113) for the memory device (34) if the delayed signal (84) occurs during a predetermined time period determined by a control signal (100) produced in dependence on the energizing signal (84).
Abstract:
An apparatus (9) or a cassette is arranged to hold currency notes (17) or other valuable articles and may be used for transporting currency notes from a bank to an automatic cash dispensing machine. The cassette includes a receptacle (10, 24) for notes (17), and locking means (78, 80) for locking and unlocking the receptacle. There is provided a tamper indicating mechanism (51, 72, 82) which is arranged to be actuated during an unlocking and locking cycle of operation of the locking means, this mechanism including a latch (82) which is set to a first state when the cassette is loaded with notes. The latch (82) is tripped during an unlocking operation of the locking means, the latch when tripped serving to prevent any further unlocking operation until such time as the latch is reset to its first state.
Abstract:
Un clavier du type a membrane utilise dans un dispositif de terminal de donnees ou une caisse enregistreuse electronique est ferme hermetiquement pour empecher l'introduction d'eau dans les elements interieurs du clavier ou autres types de contaminants liquides qui peuvent s'introduire pendant le fonctionnement du terminal. Le clavier comprend un organe de structure exterieur (48) qui forme une chambre d'air (52) s'etendant autour du perimetre d'un clavier en relief (28), empechant ainsi tout liquide renverse sur le clavier d'atteindre les elements internes du clavier par capillarite. L'organe de structure peut facilement se demonter du clavier, permettant aux elements internes d'etre changes ou substitues en fonction du domaine professionnel dans lequel le terminal ou la caisse enregistreuse est utilise.
Abstract:
The invention is concerned with the problem of reducing the chip area occupied by volatile/nonvolatile dynamic RAM (random access memory) cells. A volatile/non-volatile dynamic RAM cell (30, 80) includes a storage capacitor (32) for volatilely storing binary information during normal RAM operation; an alterable-threshold storage capacitor (33A or 83) for non-volatilely storing the information in non-volatile fashion during poweroff conditions; and an energy barrier (33F or 45) between the two capacitors. Information can be restored to the volatile capacitor either by CCD charge transfer or by charge-pumped operation. The energy barrier facilitates efficient charge pumped restore of information. In one embodiment, the energy barrier is a high concentration substrate surface region (45) having the same conductivity type as the substrate. Alternatively, the alterable-threshold non-volatile capacitor and the energy barrier are provided by a split-gate capacitor (33) which has an alterable threshold non-volatile section (33A) (the non-volatile capacitor) and a non-alterable threshold section (33F) (the energy barrier). The cells may be arranged in an array.
Abstract:
System for obtaining read/write head (26) positioning movement and control for a storage disc drive. The rotational energy source for the disc (10) is also utilized for the additional task of indexing the read/ write head assembly (26, 28). To provide a simple, low-cost and reliable means of controlling the position of head assembly (26, 28), a belt (18), driven by the disc drive, drives rollers (50, 52) in opposite directions, and solenoid actuating means (68, 70) are employed to engage one of rollers (50, 52) with a track position wheel (80) to cause said wheel (80) to rotate in one of two opposite directions. The rotational movement is converted (44, 46, 47, 49) into indexing movement of the read/write head assembly (26, 28).