Abstract:
The drive mechanism for a paper tape punch and reader assembly utilizes tape drive assemblies which move the paper tape in response to the application of continuous periodic motion and control signals. The periodic motion serves to oscillate a rocker plate between first and second limits and the control signls serve to selectively engage and disengage a detent which effects coupling between the drive shaft and the source of periodic motion. The periodic motion is imparted to the drive assembly by a connecting link which in turn is driven by an adjustable eccentric.The eccentric comprises a pulley plate which is fixed to a shaft. A circular body is adjustably movable with respect to the pulley plate and is arranged to engage the race of a ball bearing assembly which further comprises balls and a retaining ring. The connecting link has a circular opening which provides a snug fit to the exterior of the retaining ring. The pulley plate and the body are held in a fixed physical relation by two locking screws and the relative position of the two is established by an eccentric which is mounted on one of the locking screws.
Abstract:
A digital hydraulic system converts binary digital input information into displacement of a digital drive. An air reader is used to operate binary latch valves through an air hydraulic interface. A flow sensing system and a hydraulic logic unit cooperate to provide high speed exchange between the piston adders of the digital drive prior to displacement of the load. A hydraulic cylinder sweeps the load about a vertical axis. A selfcooling, air-driven hydraulic pump with an accumulator, provides relatively constant pressure. A damper secured to the piston adders has an additional drive for providing precise location at the end of damping. An incremental paper tape feed with a four motion rack with toggle action indexes the air reader.
Abstract:
Mechanism for intermittently feeding a tape wherein perforations in the tape are engageable by a tape feeding shuttle arm having a plurality of teeth adapted to reciprocate parallel to the plane of the tape as well as perpendicularly thereto and by a tape stop arm having a plurality of teeth adapted to reciprocate at least perpendicularly to the plane of the tape. The shuttle arm and the stop arm are coupled to a mechanical oscillator by a first coupling device providing reciprocating motion parallel, and by second coupling device providing reciprocating motion perpendicularly, to the plane of the tape; the second coupling device includes linkage means causing the teeth of the shuttle arm to engage the perforations in the tape while disengaging therefrom the teeth of the stop arm on a reciprocating stroke of the oscillator perpendicularly to the plane of the tape thereby allowing reciprocating movement of the shuttle arm parallel to the plane of the tape to feed the tape and subsequently on a return reciprocating stroke of the oscillator perpendicularly to the plane of the tape to disengage itself from the perforations the teeth of the shuttle arm and engage the teeth of the stop arm to prevent further feed movement of the teeth.
Abstract:
A claw mechanism for advancing a perforated record carrier, in particular a film, in a cinematograph film projector, which mechanism comprises a pivotable arm arranged parallel to the direction of advance and a forked claw member which is arranged at right angles to the direction of advance and is hinged to the arm, the claw member being moved by a continuously revolving crank pin which engages between the teeth of the fork, whilst the arm with the fork can be moved towards and away from the record carrier by means of an electromagnet in order to vary the speed of advance.