DRIVE FOR APPARATUS RECORDING OPERATIONAL CONDITIONS OF A CAR

• US 3,624,660 A
• Filed: 07/02/1970
• Issued: 11/30/1971
• Est. Priority Date: 07/09/1969
• Status: Expired due to Term

• Current Assignee: Manfred Fichter
• Original Assignee: Manfred Fichter
• Inventors: Fichter, Manfred
• Primary Examiner(s): Hartary, Joseph W.
• Application Number:
  US05/051,766
• Time in Patent Office: 516 Days
• Field of Search: 346/49,62-64,116,117
• US Class Current: 346/49
• CPC Class Codes: G01P 1/122 Speed recorders
• CPC Class Codes: G01P 3/4802 by using electronic circuits in general
• CPC Class Codes: G07C 5/06 in graphical form

Abstract

The distance travelled by a car, and the time periods during which one, or two operators, actually drive the car or are performing auxiliary services like waiting or loading, are simultaneously recorded by at least two oscillatory recording means driven by rotary operating means rotated by one synchronous motor receiving pulses from two pulse generators, one of which is activated when the car travels a distance, and the other of which is activated by a manual switch. The polarity of every alternate pulse is reversed by an electronic control circuit so that the synchronous motor is driven by alternating current. Switch means cause a rotation of the synchronous motor in opposite directions during movement and standstill of the car. The operating means associated with the travelled distance, is driven only when the motor rotates in one direction, while the operating means associated with the working time periods, causes different oscillations of the respective recording means when the motor rotates in opposite directions.

Claims

1. Drive for apparatus recording operational conditions of a car, comprising, in combination, first recording means for recording at least one operational parameter of the movement of the car;

first operating means rotatable only in one direction for actuating said first recording means;

second recording means for differently recording driving periods and periods of readiness of at least one operator of the car;

second operating means rotatable in one direction for actuating said second recording means to record said driving periods, and rotatable in the opposite direction for actuating said second recording means to record said periods of readiness;

a reversible electric motor connected with said first and second operating means for driving the same; and

control circuit means for said electric motor having a first condition for causing rotation of said motor in a first direction for driving said first operating means in said one direction thereof and said second operating means in said one direction thereof whereby said operational parameter and a driving period are recorded, and having a second condition for causing rotation of said motor in a second reversed direction so that said first operating means are not driven and so that said second operating means is driven in said opposite direction thereof whereby a period of readiness is recorded, and including switch means for placing said control circuit means in said first and second conditions.

2. A drive as claimed in claim 1 wherein said switch means for said control circuit means is responsive to movement of said car and causes said first condition during movement of the car, and said second condition during standstill of the car.

3. A drive as claimed in claim 1 wherein said electric motor is a synchronous motor;

and wherein said control circuit means include pulse generator means for generating pulses having one polarity, an electronic switching device for reversing the polarity of alternate pulses, and for supplying the pulses to said synchronous motor so that the same receives alternating current and is rotated by the same in said first and second directions of rotation when said control circuit means is in said first and second conditions thereof, respectively.

4. A drive as claimed in claim 3 wherein said electronic switching device includes a capacitor connected in parallel with said synchronous motor.

5. A drive as claimed in claim 3 wherein said switch means include reversing switch means responsive to movement of the car to cause said first condition, and to standstill of the car to cause said second condition, and manually operated switch means;

and wherein said pulse generator means include a pulse generator connected in series with said manually operated switch means and said reversing switch means for transmitting pulses to said motor in said second condition upon actuation of said manually operated switch means.

6. A drive as claimed in claim 5 wherein said pulse generator means include another pulse generator driven from a part of said car during movement of the same for generating pulses at a frequency representing said parameter of the movement of the car, said pulses at said frequency being supplied to said synchronous motor in said first condition.

7. A drive as claimed in claim 1 wherein said first operating means includes a one-way clutch operable by said motor rotating in said first direction;

and a cam means driven in said one direction through said one-way clutch by said electric motor so that said first recording means is oscillated by said cam means only when said motor rotates in said first direction.

8. A drive as claimed in claim 1 wherein said second operating means includes a cam dEvice including a drive part driven from said motor, and means for varying the shape of said cam device in response to the direction of rotation in which said drive part is driven from said motor;

and wherein said second recording means includes a cam follower engaged by said cam device so that said second recording means is oscillated by said cam device in an oscillating motion whose amplitude depends on the varied shape of said cam device whereby said second recording means records a zigzag recording whose different amplitudes represent the opposite directions of rotation of said motor and thereby said driving periods and said periods of readiness.

9. A drive as claimed in claim 8 wherein said cam device includes carrier means having a periphery engaged by said cam follower, at least one cam arm pivotally mounted on said carrier means for movement to and from a position projecting from the periphery of said carrier means and adapted to engage said cam follower, and a retracted less projecting position, and wherein said drive part engages said cam arm during rotation in one direction to move the same to said projecting position, and during rotation in the opposite direction to retract said cam arm whereby said cam shape is varied in accordance with the direction of rotation of said motor and of said drive part.

10. A drive as claimed in claim 1 wherein said first and second recording means are oscillatable, and are oscillated by said first and second operating means to record zigzag lines;

wherein said second operating means vary the oscillation amplitude of said second recording means when driven in opposite directions by said motor;

wherein said motor is a synchronous motor;

wherein said control circuit means includes a pulse generator driven from a part of the car during movement of the same for generating first pulses at a frequency representing the distance travelled by the car, said distance being said parameter, another pulse generator for generating second pulses at a constant frequency, said first and second pulses having one polarity, an electronic switching device for reversing the polarity of alternate pulses and supplying the pulses to said synchronous motor so that the same is driven by alternating current and is rotated in said first and second directions thereof when said control circuit means is in said first and second conditions thereof;

wherein said switch means include reversing switch means responsive to movement and standstill of the car to cause said first and second conditions, respectively, and a manually operated switch means associated with an operator of the car, said manually operated switch means and said reversing switch means being connected in series with said other pulse generator so that said second pulses are supplied to said motor when said manually operated switch means is manually closed during standstill of the car, so that only said first pulses are supplied to said motor when the car moves and said reversing switch means cause said first condition of said control circuit and disconnection of said manually operated switch means.

11. A drive as claimed in claim 10 wherein said first operating means includes a cam and a one-way clutch connecting said motor with said cam only when said motor rotates in said first direction so that said first recording means oscillates only during movement of the car;

and wherein said second operating means includes a cam device having an input drive part driven from said motor, and means for varying the shape of said cam device in response to rotation of said motor and input drive part in said first and second directions respectively, whereby said second recording means make zigzag recordings of different amplitude when said control circuit means are placed by said switch means in said first and second conditions, respectively.

12. A drive as claimed in claim 10 wherein said second recording means include two oscillatable recording elements respectively associated with two opeRators of the car;

wherein said second operating means include two operating elements for varying the oscillation amplitude of said two recording elements, respectively, when driven in opposite directions by said motor;

wherein said manually operated switch means includes two manually operated selector switches respectively associated with said operators; and

comprising two transmission means selectively actuated by said selector switches for connecting said motor with said two operating elements, respectively. 13 A drive as claimed in claim 12 wherein said control circuit means includes two electromagnetic means respectively controlled by said two selector switches for selectively rendering a selected one of said transmission means operative in both directions of rotation, and the respective other transmission means operative only in one direction of rotation.

14. A drive as claimed in claim 12 comprising a shiftable transmission part, and electromagnetic means controlled by said selector keys to shift said transmission part between two positions in which said motor drives said two operating elements through one of said transmission means, respectively, and said transmission part;

and two rectifying transmissions connecting said two transmission means so that the operating element which is not driven through said transmission part and the respective transmission means, is driven through the respective rectifying transmission always in the same direction of rotation irrespective of reversal of the direction of rotation of said motor.

15. A drive as claimed in claim 12 wherein each of said second operating elements includes a cam device engaging the respective second recording element for oscillating the same;

wherein each cam device includes a drive part driven from said motor, and means for varying the shape of the respective cam device in response to the direction of rotation at which said drive part is driven by said motor so that each second recording element is oscillated at an amplitude depending on the different shape of the respective cam device during standstill and movement of the car.