Apparatus for repeating the same process
AssigneeHitachi, Ltd.
InventorsTakeo Murakosi, Toshiyuki Tanno
Life of this patent
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Abstract
Two extreme points of a range within which a movable body is reciprocated, are set by two position setting means provided with variable resistors. The voltage at the sliding contact of a variable resistor coupled to the movable body is always compared with the voltages preset by the respective position setting means. The two signals produced as a result of the two comparisons are applied to a control circuit, the output of which causes the motor to drive the movable body to rotate in the forward or reverse direction in accordance with the two signals. Thus, the movable body automatically performs a reciprocal motion between the two preset extremes.
Claims8
An apparatus for repeating the same process, comprising a first and a second setting means for respectively setting a first and a second extreme point of a range, an electric motor, a movable body whose physical quantity is varied through the drive by said motor, means for generating another displacement quantity corresponding to said physical quantity,
- means for detecting whether said displacement quantity exists within said range defined by said first and second extreme points, means responsive to said detecting means for actuating said motor to shift said displacement quantity to move into said range upon the detection that said displacement quantity is out of said range,
- and a first control means responsive to said detecting means for controlling said motor upon the detection that said displacement quantity exists within said range so that said displacement quantity varies in a reciprocative manner between said first and second extreme points of said range.
An apparatus for repeating the same process, comprising a first and a second means for respectively setting a first and a second extreme point of a range, an electric motor, a movable body whose physical quantity is varied through the drive by said motor, means for generating another displacement quantity corresponding to said physical quantity, and a first control means for so controlling said motor that said displacement quantity varies in a reciprocative manner between said first and second extreme points of said range, wherein said first control means includes two comparing means for respectively comparing signals produced from said first and second setting means and representing said first and second extreme points with a signal produced from said displacement quantity generating means and representing said displacement quantity, a first gating means for delivering an output only when the levels of the outputs of said two comparing means become equal to each other, and a first relay means for controlling the direction of the rotation of said motor in accordance with the output of said first gating means.
An apparatus for repeating the same process, comprising a first and a second setting means for respectively setting a first and a second extreme point of a range, an electric motor, a movable body whose physical quantity is varied through the drive by said motor, means for generating another displacement quantity corresponding to said physical quantity, and a first control means for so controlling said motor that said displacement quantity varies in a reciprocative manner between said first and second extreme points of said range, further comprising at least one additional setting means for setting an intermediate setting position between said two extreme positions and a second control means for temporarily stopping the drive by said motor when said displacement quantity corresponds to each of said first and second extreme points and said intermediate setting position during the travelling in a predetermined one direction in the reciprocal movement of said displacement quantity.
Dependencies are inferred from the claim text.