A gasoline pump printer having a cost printing counter, a serial printing counter, and a date printer and operable at the end of each gasoline delivery for printing a record of the delivery. A printer operating shaft is connected to rotate the supporting shafts of the cost and serial counters and date printer one full revolution to (a) rotate the print wheels to perform a printout, (b) reset the cost counter print wheels to "0," and (c) index the serial counter for printing the next serial count...

A printer is provided with a plurality of print hammers, each of which is maintained in a rest position engaging a deformed elastic body. A magnetic circuit is provided for selectively maintaining each of said print hammers in said rest position and for selectively releasing said print hammer to effect printing. The magnetic circuit consists of a first portion including a portion of said print hammer and a second portion including a release coil, the first and second portions being connected in ...

A printer having restraining members each driven by electromagnet means to release an associated engaging member from restrainment and thereby to allow said engaging member to stop the rotation of an associated type wheel, wherein said restraining member comprises a first restraining member which moves in a direction to get close to a rotary shaft of said engaging member and releases said engaging member from restrainment and a second restraining member which moves in a direction to move away fr...

A printer has control means for print hammers which are arranged in columns and each of which is displaceable between a rest position and a print position, and respective deformable elastic bodies are maintained in a deformed condition by the print hammers in the rest position and bias the print hammers toward the print position. The control means for each hammer comprises a first magnetic circuit including a permanent magnet and a portion of the print hammer, and operable to hold the print hamm...

A printer is provided with a plurality of print hammers, each of which is maintained in a rest position engaging a deformed elastic body. Individual magnetic circuits in combination with a single permanent magnet are provided for selectively maintaining each of said print hammers in said rest position and for selectively releasing said print hammers to effect printing. Each magnetic circuit consists of a first portion including a device for adjusting the reluctance of said second portion upon re...

A recording medium is wound on a roller shaft, a feed roller feeds the recording medium in a predetermined direction, a recording head assembly records information signals on the recording medium and a drive mechanism drives the recording head assembly to scan the recording medium. A spring is provided between the roller shaft and the feed roller to urge them to contact each other.

A printer comprising a typewheel, typebar and position determining device. The typewheel is made with raised characters on its periphery and rotates at constant speed. The typebar is rockably supported on a shaft and has a portion for striking a selected character through paper, etc. in its printing position. The position determining device is associated with the typebar to swing it from the rest position to the driving position. The typebar in its driving position is impulsively rocked by engag...

A printer has a plurality of print hammers displaceable between a rest position and a print position, and respective deformable elastic bodies maintained in a deformed position by each print hammer in its rest position and biasing the print hammer toward its print position. Respective magnetic circuit control means are selectively operable to hold each print hammer in its rest position and to release the print hammer for displacement to the print position by the respective elastic body. Each mag...

A printer includes a print wheel having an outer circular row of typefaces comprising digits and punctuation signs and an inner circular row of typefaces comprising symbols, and hammer apparatus for actuating the typefaces of the print wheel to effect printing. The type wheel and the hammer apparatus are mounted on a carriage which travels along a path defining a left-hand group of printing positions and a right-hand group of printing positions. A cam extending along the path of the carriage fun...

A low cost dot printer head which includes a base plate of ferromagnetic material with slots that divide a rear portion of the plate into several magnetic circuits that are isolated from one another and that hold separate coils for individually magnetizing the circuits, the head also including an armature slideable along each magnetic circuit and a printer wire having a rear end fixed to a corresponding armature and a front end slideable in a guide mounted at the front of the base plate.