US 4,679,148 A · Glass machine controller

Abstract

A glass-forming machine controller permits substantially instantaneous updating of the operating times of the machine components without the complex circuitry required of prior controllers. In the controller, a dual port random access memory (RAM) is provided for storing the on/off statuses of the machine components at each of the increments of time into which each cycle of operation of the machine may be divided. The controller accommodates simultaneous access to the RAM for changing the timing of the machine components and operating the machine components. The memory locations of the RAM may be grouped to provide multiple addressable locations for each increment of time. An address group generator develops sequential address group signals to access each of the multiple addressable memory locations in each increment of time and to obtain the on/off statuses of all of the machine components in each increment of time. The plurality of machine component actuators may be arrayed in plural groups, with the actuators of each of the plural groups sharing a common activating terminal and with one component actuator in each plural group sharing a common actuating terminal. The number of groups of component actuators are equal to the number of groups of memory locations in the RAM in each increment of time. By connecting the address group generator to the activating terminals of the component actuator array and to the RAM and connecting the data outputs of the RAM to the actuating terminals of the component actuator array, such a controller can effect the operation of a multiplicity of components with a minimal number of components.

Claims4

Dependent claims

A programmable automatic controller for controlling at least one section of a glassware-forming machine including a plurality of movable components that operate in timed relationship with respect to one another to form rigid glassware articles from gobs of molten glass, comprising

means for generating digital indications of the increments of time elapsed in each cycle of operation of the machine;
a dual port random access memory with sufficient memory locations for storing the on/off statuses of each of the plural machine components in each increment of time in each cycle of operation of the machine, said memory providing grouped memory locations to provide multiple address locations in the memory for each increment of time and having two separate sets of input/output ports allowing independent and substantially simultaneous storage and retrieval for each of the memory locations;
an address group generator to develop a series of sequential address group signals in each increment of time to permit differentiation between the groups of plural components stored in the random access memory during each increment of time;
a plurality of component actuators, said component actuators being connected in plural groups with each plural group sharing a common activating terminal, and with one component actuator in each plural group sharing a common actuating terminal, said activating terminals of each group being connected with the address group generator and said shared actuating terminals of the component actuators being connected with the output ports of the random access memory;
wherein each of the machine components may be efficiently actuated by the on/off status stored in tne random access memory in each increment of time.

2 more elements

timing means to generate a digital signal indicating increments of time elapsed in each cycle of machine operation;
a dual port random access memory connected with said timing means and having plural address inputs and plural data input/output for storing signals corresponding to the on/off statuses of the plural components for each of the increments of time in each cycle of operation of the machine, the on/off statuses of said plural components being arranged in groups and stored in different portions of the random access memory;
an oscillator to generate a signal at a frequency at least greater than the number of groups (p) of the plural components for which signals are stored in each increment of time in each cycle of operation, times the number of increments of time (n) in each cycle of operation, divided by the smallest increment of time (t) of machine operation anticipated, and a counter connected with the oscillator to generate an address group signal to permit differentiation between the groups of plural components stored in the random access memory during each increment of time and providing at least p sequential address group signals in each increment of time in each cycle of operation;
a plurality of component actuators, said component acuators being connected in p plural groups with each plural group sharing a common activating terminal, and with one component actuator in each of the p plural groups sharing a common actuating terminal, said activating terminals of each group being connected with the address group generator and said shared actuating terminals of the component actuators being connected with the data output terminals of the random access memory;
wherein said random access memory will present the on/off statuses of the plural components in each group of plural components in each increment of time in response to the signal of the timing means and the counter, and specific components may be actuated in response to application of said on/off statuses to the shared actuating terminals of the plurality of component actuators and the application of the sequential address group signal to the group activating terminals.

2 more elements

Dependencies are inferred from the claim text.

Glass machine controller

Life of this patent

Glass machine controller

Life of this patent

Abstract

Claims4