Electric data recorder

Claim 2

In a data recorder of the type comprising an upstanding main frame, a roller platen carried on the frame, a fork pivoted on the frame arranged to sweep the platen from a home position horizontally through a substantially erect plane printing path and return, a gate including a bed for carrying a form to receive a printing impression, said gate pivotally mounted to swing between an open loading position and a closed printing position, means biasing the gate towards open position, electric motor means for driving said form to sweep the platen through said printing path including a crank engageable in a slot in the fork for driving the same, and switch means for controlling the energization of said motor, the improvement comprising: means to cause imprinting of said form by said motor means solely during the printing stroke and to then interrupt the said driving connection between the fork and the motor means; spring means acting on the fork to restore the same to a location placing the platen in home position once the driving connection is interrupted; and means to effect reestablishment of the driving connection in readiness for a subsequent cycle of operation.

Claim 3

A data recorder as set forth in claim 1 in which the electric motor means includes an electric motor and a crank continuously drivingly connected and free of any braking control on crank movement whereby crank motion is solely a function of motor energization.

Claim 4

A data recorder as set forth in claim 2 in which the slot in said fork has adjacent its open end a throat portion bounded by an idle arc designed to receive the crank in a nondriving manner as it reenters the slot while coasting after the motor has been deenergized.

Claim 5

In a data recorder of the type comprising an upstanding main frame, a roller platen carried on the frame, a fork pivoted on the frame arranged to sweep the platen from a home position horizontally through a substantially erect plane printing path and return, a gate including a bed for carrying a form to receive a printing impression, said gate pivotally mounted to swing between an open loading position and a closed printing position, means biasing the gate towards open position, electric motor means for driving said fork to sweep the platen through said printing path including a crank engageable in a slot in the fork for driving the same, and switch means for controlling the energization of said motor, the improvement comprising: the slot in said form having an open end and being so configured that the crank drives the fork in the printing direction only and then allows the crank to escape from the slot as the platen reaches the end of its printing stroke, spring means for moving the fork in a direction to restore the roller platen to home position when the crank has escaped from the slot; a control bail pivoted on the frame including means for latching the gate in closed position in response to pivoting of the bail in the opposite direction; means directly responsive to bail motion for closing said switch in response to bail pivoting in said latching direction and for opening said switch in response to bail pivoting in the release direction; a lateral arm on said fork; and means connected with said bail and providing an obstruction in the path of said arm, the position of said obstruction being so callibrated as to cause said arm to pivot said bail to non-latching position as the fork reaches the end of its stroke in the printing direction, thereby substantially simultaneously opening said switch and said gate at the time said fork is restored to home position by said spring means.

Claim 6

In a data recorder of the type comprising an upstanding main frame, a roller platen carried on the frame, a fork pivoted on the frame arranged to sweep the platen from a home position horizontally through a substantially erect plane printing path and return, a gate including a bed for carrying a form to receive a printing impression, said gate pivotally mounted to swing between an open loading position and a closed printing position, means biasing the gate towards open position, electric motor means for driving said fork to sweep the platen through said printing path including a crank engageable in a slot in the fork for driving the same, and switch means for controlling the energization of said motor, the improvement comprising: the slot in said form having an open end and being so configured that the crank drives the fork in the printing direction only and then allows the crank to escape from the slot as the platen reaches the end of its printing stroke, spring means for moving the fork in a direction to restore the roller platen to home position when the crank has escaped from the slot; a control bail pivoted on the frame including means for latching the gate in closed position in response to pivoting of the bail in the opposite direction; means directly responsive to bail motion for closing said switch in response to bail pivoting in said latching direction and for opening said switch in response to bail pivoting in the release direction; a lateral arm on said fork; and means connected with said bail and providing an obstruction in the path of said arm, the position of said obstruction being so callibrated as to cause said arm to pivot said bail to non-latching position as the fork reaches the end of its stroke in the printing direction, thereby substantially simultaneously opening said switch and said gate at the time said fork is restored to home position by said spring means.

Claim 7

A data recorder as set forth in claim 4 in which the means for closing said switch is an arm pivoted coaxially with said bail, and which includes cam means on said bail coacting with a projection on said arm.

Claim 8

A data recorder as set forth in claim 4 in which the obstruction providing means connected with said bail is a link formed with an elongate slot and pivotally supported at one end on said bail, and in which the arm includes a pin projection riding in said slot.

Claim 9

A data recorder as set forth in claim 4 in which there is a bumper pad so located as to arrest the fork at home position upon its return by said spring means, in which the roller platen is guided in its traverse of the bed by rails parallel to the bed, in which the platen is associated with rollers which run in contact with said guide rails, and in which said rails each exhibit a recess adjacent the home position of said platen for receiving said rollers and of a depth sufficient to prevent rebound of said fork when stopped by said bumper pad upon return of the platen by said spring means.