Browse Prior Art Database

Control Apparatus

IP.com Disclosure Number: IPCOM000096407D
Original Publication Date: 1963-May-01
Included in the Prior Art Database: 2005-Mar-07
Document File: 3 page(s) / 83K

Publishing Venue

IBM

Related People

Cutaia, A: AUTHOR

Abstract

The control apparatus develops a plurality of variable duration control signals from a diode matrix. Certain control signals so developed are fed back into the matrix to develop other control signals having different durations of time. Hence, the control apparatus produces control signals each occurring at a pre-determined time and having a discrete time interval. The control apparatus is for controlling a record card punching machine.

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Control Apparatus

The control apparatus develops a plurality of variable duration control signals from a diode matrix. Certain control signals so developed are fed back into the matrix to develop other control signals having different durations of time. Hence, the control apparatus produces control signals each occurring at a pre- determined time and having a discrete time interval. The control apparatus is for controlling a record card punching machine.

The control circuit functions to generate control signals for gating characters from character storage unit 10, to character buffer 15 and subsequently from buffer 15 to punch magnets 20 for controlling the set-up mechanism for the punches. The control circuit also functions to control stepper drive 25 which incrementally advances record cards C through the punch station.

Timing is provided by a pulse generator in combination with a binary counter. Discs 30 and 31 are fixed to the punch cam shaft. Disc 30 has a single notch for generating a home pulse. Disc 31 has five notches accurately spaced from each other to generate five pulses during the time interval between successive home pulses. Magnetic sensing head 32 is disposed relative to disc 30 to develop a home pulse as the notch passes. Similarly, magnetic sensing head 33 is disposed relative to disc 31 to provide a series of impulses as the notches in disc 31 pass.

The impulses provided by head 33 are utilized to advance counter 40. Counter 40 has five bistable elements, each having bipolar outputs. The home pulse provided by head 32, among other things, is utilized to re-set counter 40. A program control unit 50 provides certain control signals which are fed into the matrix. Only the essential control signals are shown. Normally other control signals are provided.

Outputs of counter 40 are fed into the matrix together with the home pulse signal output, a no-home pulse signal output which is taken from inverter 45 and signal outputs from unit 50.

The first control signal developed by the matrix for controlling the punch is a Run signal. The Run signal is developed by combining a Stop signal with a Card Registration signal and with timing signals T1, T2, T3, T4 and T5. This is accomplished by the diodes of the matrix in combination with resistors R which are connected to a plus voltage.

The Run signal is carried by conductor 60 which is connected to the set terminal of Run latch 61. Outputs of latch 61 are fed back into the matrix.

The next signal developed effects a readout of a character from storage 10 to buffer 15. This signal is developed on conductor 62 by combining the Run conductor with timing outputs T4,...