Storey selector device for lifts专利检索-电梯轿架自动扶梯，电梯和楼梯专利检索查询-专利查询网

Storey selector device for lifts

阅读：571发布：2023-07-21

专利汇可以提供Storey selector device for lifts专利检索，专利查询，专利分析的服务。并且A storey selector device for elevators and the like has a number of destination selector switches for different stopping levels which connect different tappings of a fixed resistance to one end of a sensing diagonal of a Wheatstone bridge, the other end of the sensing diagonal being connected to the slider of a potentiometer controlled by movement of the elevator carriage. The sensing diagonal incorporates unidirectional conductive elements responsive to imbalance currents in opposite directions to control movement of the elevator motor in opposite respective directions to bring the elevator carriage to the selected destination level.，下面是Storey selector device for lifts专利的具体信息内容。

权利要求

1. Movement preselection device for elevators having a moving carriage, comprising in combination: a. voltage supply terminals; b. a potentiometer having a sliding contact, the end terminals of said potentiometer being connected between said supply terminals; c. a fixed resistance having a plurality of taps connected between said supply terminals in parallel with said potentiometer, d. diagonal sensing arm means connected between said potentiometer sliding contact and a selected one of said taps, said arm means including normally open switches for each elevator stopping point, having respective first terminals connected to respective taps and respective second terminals connected in common; e. means controlling the position of the sliding contact upon said potentiometer in response to movement of the elevator carriage; f. a control means in said arm means responsive to current flow in opposite directions in said arm means; and h. carriage drive means controlled by said control means for moving the elevator carriage selectively in opposite directions in response to current flow in said opposite directions in said arm means.

2. Movement pre-selection device according to claim 1, wherein said switches are operable from each stopping

3. Movement preselection device according to claim 13, wherein said conTrol means in said arm means is formed by two parallel branches containing respective unidirectional circuit elements of opposite polarity for discriminating the direction of current in the sensing diagonal to control said carriage drive means to move said carriage selectively in opposite respective directions.

4. Movement pre-selection device according to claim 3, wherein said unidirectional circuit elements are diodes.

5. Movement pre-selection device according to claim 3, wherein said unidirectional circuit elements comprise transistors of complementary types.

6. Movement pre-selection device according to claim 1, wherein said control means for the driving means includes power amplification means.

7. Movement pre-selection device according to claim 1, wherein the potentiometer is formed by a metal cable anchored to the carriage for movement therewith and an intermediate contact connected electrically to said cable and secured to a part of the fixed installation of the elevator or.

8. Movement pre-selection device according to claim 7, wherein said intermediate contact is formed by a pulley around which said cable passes.

9. Movement pre-selection device according to claim 7, wherein said metal cable is the operating cable of a speed limiter of said elevator to elevator.

10. Movement pre-selection device according to claim 7, including a connecting element secured to the elevator carriage and means securing the ends of said metal cable to and electrically insulated said ends from said connecting element, the direct voltage supply being connected across said two ends of said cable.

11. Movement pre-selection device according to claim 1, wherein said potentiometer is formed by a metal wire extending longitudinally in the space in which said elevator carriage moves, means anchoring and electrically insulating the ends of said wire, and a sliding contact in contact with said wire and fixed to the conveyor carriage, the direct voltage supply being connected across said ends of said wire.

12. Movement pre-selective device according to claim 1 including an auxiliary circuit maintaining the operation of said carriage drive means after de-energisation of said control means, and means operable directly by the elevator carriage to break said auxiliary circuit upon arrival of said carriage at the pre-selected destination point.

说明书全文

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Storey selector device for lifts

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