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AssigneeJungheinrich Unternehmensverwaltung KG
InventorsHans-Joachim Klose, Udo-Frank Hellmig
Estimating the term…
A controller with at least one switch or a plurality of switches e.g. in the form of a power switchgroup for controlling an electric drive motor in a vehicle wherein a set point selector consists of a mask that is rigidly connected or interchangeably attached to an actuating member of the controller, the mask is adapted to provide a predetermined set point characteristic in cooperation with control elements that are connected to an input of an electronic circuit which includes a second input to which are connected means for varying a reference voltage at the output of the electronic circuit and the control range of the set point characteristic. The control elements cooperating with the mask may consist of an opto-electronic transmitter-receiver device.
A controller comprising:
A controller as in claim 6, wherein said circuit means includes an operational amplifier having a first terminal coupled to the first input and a second terminal coupled to the second input, and wherein said circuit produces the output signal as a first voltage, and wherein said circuit means adds a second constant voltage to the first voltage for shifting the signal.
An electric vehicle, comprising motor means, a movable actuating member, a control member movable by said actuating member, sensing means sensibly coupleable to said control member for producing signals in response to the position of the control means, said control member defining a specific characteristic having a given form and slope configuration representing a specific variation of one variable relative to a variation in another variable, said sensing means being arranged for producing an output corresponding to the characteristic when the control member is moved by the actuating member through a given range, a circuit having a first input coupled to the sensing means, said circuit having a signal path for producing an output signal corresponding to the characteristic including the form and slope configuration when the control member is moved by the actuating member through the range, reference means in said circuit for establishing a reference value, said circuit having a second input at said reference means, variable second input means for applying a second signal to said second input means, said circuit having circuit means for shifting the characteristic at the output to a different level but with the same form and configuration of the characteristic so that in the output signal the absolute value of the one variable changes without changing the variation of the one variable relative to the variation of the other variable, and actuating means for shifting the second signal of said second input means.
A vehicle as in claim 8, wherein said circuit means includes an operational amplifer having a first terminal coupled to the first input and a second terminal coupled to the second input.
A controller comprising a movable member, a mask having an edge of predetermined shape, a sensor, a circuit having two inputs and an output, a variable control for producing a plurality of signals, and means mechanically coupling the movement of the movable member with the mask so that said edge moves near said sensor and electrically coupling the sensor to one of the inputs and the variable control to the other input for causing said output to exhibit output values corresponding to the shape of the mask relative to a first direct electrical value when the variable control produces one signal, and for causing said output to produce the same output values corresponding to the shape of the mask relative to a second direct electrical value when the variable control produces other signals.
Dependencies are inferred from the claim text.