US1479576A - Elevator control - Google Patents

Description

Jan. 1, 1924. 1,479,576

c. J. ANDERSON ELEVATOR comm.

Filed Jan. is, 1923 a Sheets-Sheet i MIWHM. "WI

Jan. 1, 9

' c. J. ANDERSON ELEVATOR CONTROL Filed Jan. 19, 1923 3 Sheets-Sheet 2 Jan. 1, 1924 1 c. J. ANDERSON ELEVATOR CONTROL Filed Jan. 19, 1923 3 Sheets-Sheet 5 5 w Q N M 0? v 0 ofokm. f Qw/ f m Patented Jan. 1, 1924.

CARL J. ANDERSON, F CHICAGQILLINOIS.

ELEVATOR CONTROL.

Application filed January 19, 1923. Serial No. 813,591.

To all whom it may concern:

Be it known that I, CARL J. ANDERSON, a citizenof the United States of America, and a resident of Chicago, county of Cook, and State'of Illinois, have invented certain new and useful Improvements in Elevator Controls, of which the following is a specification.

My invention relates to controllers for electrically operated elevators, and has for its object improvement ih such devices.

In the accompanying drawings- Fig. 1 is a front elevation of the device;

Fig. 2 is a section on line 22 of Fig. 1;

Fig. 3 is a partial side elevation;

Fig. 1 is a diagram of a four-floor installation with the elevator represented as standing at the first floor;

Fig. 5 represents the same parts when the elevator is standing at the second floor; and

Fig. 6 is a diagram of so muchof the general electrical connections as is necessary to an understanding of the control of the elevator.

The device is secured to, and partly contained in, an open faced box 11 which is provided with lugs 12 by which it is secured in the elevator shaft adjacent to. the elevator moving therein. There isa device like that of Fig. 1 at each intermediate floor, and a simplified form of the same device at th top and bottom floors.

Inside of the box 11 is a piece of insulating material 13, and secured thereto near the center is a bracket 14 which is provided with studs 15 and 16. Pivoted upon these arearms 17 and 18, each of which is provided with a contact end 19 and a roller 20. Between the arms 17 and 18, is a spring 21 which acts to press the arms apart and brings their ends 19 against studs 22 and 23, which are electrical terminals.

On the extension 24 of box 11 is a stud 25, and on this stud are pivotedlevers 26 and 27 each of which has a cam arm 28 and a roller-carrying arm 29. Between the arms 28 is a. spring 30 which acts to push these arms apart, but t is movement is limited by'the part 31 on onearm engaging part 32 on the other. (Fig. 3.) The extreme distance arms 28 may he moved from each other is that represented. in Fig. 1. In this position the arms may be oscillated back and forth on the stud 25, the limits of which oscillation are determined by the levers 26 and 27 striking parts on extension 24. In this operation, the levers 26 and 27 are sections of a lever pivoted onthe stud 25.

On the arms 28 are cams 34 and 35, and adjacent surfaces 36 which are arcs of circles having the stud 25 for a center. When the levers 26 and 27 are in the position shown in Fig. 1, the surface 36 on lever 26 acts on roller 20 of arm 17 to hold contact 19 of that arm away from the adjacent electrical terminal 22. The roller 20 on arm 18 being ,free from cam 34 and its adjacent surface 36, is pushed by spring 21 so that its contact end 19 engages terminal 23. When levers 26 and 27 are moved to their other extreme, the cam 34 first engages roller 20 to break the electrical connection of arm 18, and immediately thereafter cam 35 releases its roller 20 so that spring 21 may move arm 17 to electrical connection with terminal 22. In this, operation there is a brief interval during whichthe connections are broken to both 22 and 23.

On the arms 29 of lever sections 26 and 27 are rollers 38 and 39, and on the side of the elevator car is a cam arranged to engage these rollers as the car moves up and down. (Figs. 1, 4 and 5.) This cam is so located that it pushes a roller 38 or 39 to its extreme inward position, and is long enough.

to engage both rollers at the same time as shown in Fig. 5. If we assume the cam 40 of Fig. 1 to be moving downward in a line parallel with its face, the said cam holds the roller 38 and then strikes the roller 39, moving it inward on its pivot 25. In this action the spring 30 is compressedyand cam 34: strikes its roller 20 to move arm 18 so as to break electrical connection at 23. If the car stops in this position, the electrical connection is broken at both 22 and 23. But

if the car continues on down, then cam 10 releasesroller 38 and spring 30 expands to release arm 17, and spring 21 acting on this I arm makes a new connection at 22.

The arm 17 and roller 38 represent control of the car whenmoving upward, and arm 18 and roller 39 represent control for it when moving downward. As the car comes to the first floor only by moving down ward, and to the top floor only by moving upward, only one arm and roller are need ed for each of these places. But for intermediate floors, two arms and rollers needed as the car comes to these'fioors in both upward and downward movements.

The general electrical arrangement is shown in Fig. 6, in which ll, H and HT represent the lines leading to the source of electrical power, and 100 represents a motor for driving the elevator. The magnet 41 serves to connect contact 42 to contact 43, and contact 44 to contact 45 for starting the motor 100 in the proper direction to move the elevator upward. The magnet 46 serves in a similar manner to connect 47 to 48, and 49 to 50, for moving the elevator downward. The magnets 41 and 46 may be solenoids for moving levers as shown in my Patent No. 1,318,345, issued October 14, 1919. 51 is a break magnet which need not be considered here as it forms no part of the present invention.

The selecting magnets for the different floors are shown at 52, 53, 54 and 55 and may be of any convenient construction for making and breaking connections as will be described. The push buttons in the hall are represented by 1 2 3 and 4 The corresponding buttons in. the car are represented by 1 2 3 and 4 In Figs. 4, 5 and 6, the arms 17 are represented by the letter U to indicate the up ward movement, and the arms 18 are represented by the'letter D to indicate downward elevator. At the same time magnet 54 moves its lever 56 to break the connection between and 66 and remake it between 56 and 66. The currentthen goes from 60 to 75, 56, 66 and so on. This shunts the button 3 and holds the circuit independent of whether the operator holds the button closed or not. It also shunts the resistance 61;

The connections just described are held during the rise ofthe elevator. When the elevator is arriving at the second floor, the cam 40 first engages wheel 39 to hold it and then engages wheel 38 to break the connection of the U-lever at this landing. I But as the circuit was made thru the U-lever of the third floor, this break at the second floor affects nothing. When the car leaves the second floor it leaves the D-lever in contact with its'adjacent contact terminal, but the U-leverzhas its connection broken. When the carv reaches the third floor, the circuit for magnet 41 is broken at the U-lever for; this floor, and this in turn breaks the cir ravaevc cuit for the motor and stops the car, With connections broken at both levers. This condition is shown for the second floor in F i s..5 and 6.

ssuming that the elevator is' standing at the second floor, as in Figs. 5 and 6, it

will be evident that pressing the button for the third floor will produce the same result as before except that the elevator will move only the distance from one floor to the next. If the button for the. first floor should be pressed when the elevator is standing at the second.floor, then the circuit would go thru the selecting magnet 52, the D-lever of the first floor and the magnet 46 for start ing the motor to move the elevator in the downward direction.

What I claim is:

1. In a device of the class described, two pivoted levers, a'sp'ring acting on said levers so that they normally move as a single lever but each lever being movable with respect to the other by compression of said spring,

and electrical terminals controlled by the movements of said levers.

2. In a device of the class described, two levers mounted upon a common pivot, a spring acting on said levers so that they normally move as a single lever pivoted on its center, said spring being adapted to yield so that either lever may be moved with respect to the other, and electrical terminals controlled by the movements of said levers.

3. The combination with an elevator'car, and a cam thereon, of a lever composed of two'sections mounted upon a common pivot, a yielding connection between said sections and serving to cause them to normally operate as a single lever on a 'pivot, rollers on said sections engaged by the cam on a passing car, said parts being so arranged that the dam will move one section with respect to" the other and later permit the second to move to normal relationship so that the sum of the two movements will be a reversal of the lever on' its pivot, and electrical connectlons operated by such movements.

4. The combination with an elevator car, anda cam thereon, of a lever composed of two sections yieldingly connected together,

a pivot'al'support for .the lever, means by which upon a car passing the lever the cam thereon will cause a movement of the lever sections one at a time so as to leave the lever moved on its pivot tofa new position, and electrical connections controlled by the lever and in turn controlling the car.

5. The combination with an elevator car,

and a cam thereon, of a lever composed of sections yieldingly connected together, a

pivotal support for the lever, a circuitv clos-- mg device for each section, the open or,

closed condition of which device is determined by the position of the section, and

connection put under strain by the movement of the first section.

6. The combination with an elevator car, a cam thereon, and two contact closing devices one of which controls the upward movement of the car and the other of which controls the downward movement thereof, of a lever composed of two sections each of which controls one of said contact closing devices, a pivot upon which said sections are independently movable, and a spring connecting the sections and serving to hold them normally in a definite relationship to each other yet adapted to yield so that either, section may be moved with respect to the other, said parts being so constructed that upon a car passing a lever the cam will hold one section and then move the other to compress the spring and will i then hold the second and release the firstso that said spring may move it.

7. In an elevator system, an elevator car and a motor for raising and lowering it thru the distance of several floors, a pair of contact closing devices at each intermediate floor, one of which devices is always open and the other closed when the car is at any other floor, connections from the contact closing devices for controlling the motor circuit, and means operated by the moving car for reversing the open and closed condition of said contact closing devices as the car passes from one side of the floor to the other.

8. In a device of the class described, two independently movable contact devices, a

spring located between said devices and under strain to move them toward closed posi tion, mechanism arranged to hold one of them always open, means for operating said mechanism to open the closed device and to put further strain on said spring, and further means for releasing the previously open device so that the spring may close it.

9. In a device of the class described, two independently movable contact closing devices, a spring located between said devices and under strain to move them toward closed position, a lever havingtwo independently movable sections each being provided with means for opening the corresponding contact closing device, and means by which the sections are operated in succession to cause successive movements of the contact closing devices.

CARL J. ANDERSON.

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