US2600676A - Electromechanical automatic elevator control - Google Patents

Description

June 17, 1952' A. w. NOON 2,600,676

ELECTROMECHANICAL AUTOMATIC ELEVATOR CONTROL Filed Feb. 10, 1950 I 6 Sheets-Sheet l INVEN TOR.

ALGA/Z0 WJVOON,

% A 7- roe/vex June 17, 1952 A. w. NOON 2,600,675

ELECTROMECHANICAL AUTOMATIC ELEVATOR CONTROL Filed Feb. 10, 1950 6 Sheets-Sheet 3 56a. 4 76 6752 69 t 5.9 676 84 8;? 2g

W 6'. INVENTOR.

Ana/v20 WJVZJON,

BY v

ii WW June 17, 1952 w, NOON 2,600,676

ELECTROMECHANICAL AUTOMATIC ELEVATOR CONTROL Filed Feb. 10, 1950 6 Sheets-Sheet 4 JNVENTOR. ALGA/Z0 VVIZVBON,

Arroe/wsx Patented June 17, 1952 OFFICE ELECTROMECHANICAL AUTOMATIC ELEVATOR CONTROL Alonzo W. Noon, San Diego, Calif., assignor to William P. Elser, San Diego, Calif.

Application February 10,1950, Serial No. 143,440

14 Claims.

My invention relates to electro-mechanical automatic elevator controls, and its objects are to provide an elevator system wherein the selector' control is predominantly mechanical and electrical connections are largely dispensed with or rendered less complex; to provide a more efficient control for causing the elevator car automatically to stop to discharge passengers at floors selected by the operator; to cause the elevator car, while travelling up or down, automatically to stop at any floor to pick up passengers desiring to travel in the direction in which the car is proceeding and later to return in the opposite direction to pick up passengers wishing to proceed in said reversed direction; to cause the car to stop to pick up passengers desiring to go in an opposite direction to that in which the car has been proceeding and then to proceed in such reversed direction if there are no passengers wishing to go in the original direction; to render the parts of the control and connections thereof accessible for inspection, adjustment, replacement, restoration and repair, and generally to provide an automatic elevator control which is simple and economical of construction, efficient in action, novel in design, and of prolonged life and durability. These and other objects will appear from the drawing and as hereinafter more particularly described and claimed.

Attention is hereby directed to the drawing, illustrating a preferred form of my invention, in which similar numerals of designation refer to similar parts throughout the several views, and in which:

Figure 1 is a simplified schematic representation of an elevator system, showing the application of my invention thereto;

Fig. 2 is a front elevation of the elevator car operating control mechanism;

Fig. 3 is a vertical section on line 3--3 of the control mechanism shown in Fig. 2, looking in the direction of the arrows;

Fig. 4 is a horizontal section on line 4--4, of Fig. 2, looking in the direction of the arrows;

Fig. 5 is an enlarged front elevation, partly in section,of the piloting head and adjacent parts shown in Fig. 2

Fig. 6 is a horizontal section on line 66 of Fig. 5, looking in the direction of the arrows;

Fig. 7 is an enlarged detailed view of a portion of Fig. 5, showing the operation of the piloting head in effecting contact with a piloting switch;

Fig. 8 is a vertical section on line 8-8 of Fig. '7, looking in the direction of the arrows;

Fig. 9 is'an enlarged detailed view of a part of 2 Fig. 5, showing in elevation the left end portion of the piloting head;

Fig. 10 is a rear elevation of one of the two multiple stop arms, pivotally mounted upon the backs of the ends of the piloting head, the contacting piloting switch being indicated in dashed lines;

Fig. 11 is a horizontal section on line l|-H of Fig. 10, looking in the direction of the arrows;

Fig. 12 is a schematic wiring diagram showing generally the elevator control circuit;

Fig. 13 is a wiring diagram of a portion of the elevator run circuit; and

Fig. 14 is a key representation of the coils and contact members shown schematically in Fig. 12.

Referring to the drawing, I have illustrated in Figure l the main features of an assembly or system in which is incorporated the improvement.

constituting my invention, and which includes a conventional form of elevator hoistway 14 extending vertically through the building l5, and opening into the floors thereof (here shown to be three in number, but which may be any number desired). Conventionally suspended to slide vertically within said hoistway [4 through the employment of the usual cables I6, traction sheaves l1, and counter weights (not shown) driven by the hoisting motor I8, is the elevator car l9 the hoisting motor being operated through conventional switches mounted upon a relay panel piloted by my electro-mechanical automatic control mechanism 20. As shown, this mechanism 20 is connected to be driven by the well known means of two steel cables 2| and 22 attached to the car l9; one of which cables extends from the top of the car to be wound around an overhead sheave in the manner similar to a measuring tape, and the other cable extends from the bottom of the car around a tension sleeve and then upward to a second overhead sheave upon which it is similarly but oppositely Wound. The overhead sheaves through the connection of sprockets and sprocket chain as hereinafter described cause the operation of the control mechanism 20, one cable winding up as the other is unwound in the driving operation. The usual up and down push buttons I9a and I91) are provided for causing the control mechanism to stop the car at the floor desired. These buttons allow a passenger outside the car to direct its passage to the floor from which the signal is given, and upon gaining admittance to the car, through the use of its push buttons thereafter to direct its progress to arrive at the floor of his exit.

Reference may now be had to Figs. 2 to 11, in elusive, in which I have illustrated in detail the various parts of my improved electro-mechanical control mechanism preferably housed within the 1011;; open frame formed with square or rectangular top and bottom plates 24 and 25, secured at their corners to the elongate-cl upright angle irons 25, 27, 23 and 29. In the center of the bottom plate 25 is formed the ball thrust bearing 35, in which is journalled against longitudinal movement the lower end of the upright screw 3 l, carrying the bevel gear 32 meshing with the bevel gear 33 upon the inner end of the operating shaft 3 which is horizontally disposed and journailed against longitudinal movement in the bearing 35 aflixed to the lower face of the plate 25. Upon the outer end of the shaft 34 is mounted the sprocket 36 connected by a sprocket chain 37 with the sprocket 33 mounted to rotate upon the horizontally disposed shaft 39 carrying the overhead sheaves 45. As will be observed, the bottom plate 25 is located well above the lower ends or feet of the said angle irons in order that sufficient clearance may be provided for the operation of the bevel gears 52 and 53 within the frame 23. The top end of the upright screw 3! is journalled in the bearing 4i located in the center of the top Plate 24.

- 'Threaded to engage with the threaded portion 62 of the screw 31 is the sleeve 43 press within the hub 44 of the deck platform 6504 of thecross head t5, so that upon rotation of the shaft 3!, the head 45 will becaused to travel up or down in accordance with the rotation of said shaft, and in co-ordination with the up and down motion of the elevator car in the manner well understood in the art; guide rods 45, livertically extending between and secured to the plates 24 and 25 of the frame 23 and positioned to make sliding contact with the apertured cars 48 and 48a welded to the sides of the declrplatform of said head, serving to keep and maintain said head without deviation in a straight path parallel to the upright angle irons of said box 26.

The main supporting body of the cross is a horizontally disposed square or rectangular metallic plate forming said deck platform upon which is mounted the piloting head it, com prising the upright base or back plate 58; spaced top and bottom way strips 5i and 52 horizontally secured to said plate and formin the straight guideway 53 of uniform width between said strips; a main slide 55 and in slipping contact with the face thereof, the auxiliary slides 55 and 55, all located within said guideway and adapted separately to slide therein in sliding contact with the strips 5| and 52; transfer solenoids 5i and 58 secured to the rear face of the back plate 5 cams 59 and 69 welded to or integral with said main slide 54 and extending forwardly from the face thereof; auxiliary'slide actuators 5i and 5?. pivotally mounted upon pins Bid and 62a affixed to the top way strip 5| a tension spring 63 yieldingly connecting said auxiliary slides; stop arms 64 and 55 pivotally mounted upon the main slide 54 at the rear thereof; front plate 65 and upright directional tracks, consisting of the elongated lip-tracks 61a and 51b, and the elongated downtracks 68a and 58b, mounted upon the sides of the electrically nonconducting frame secured to and carried upon the face of said front plate 58; the up-tracks being insulated electrically from the down-tracks by the insulation blocks 95 and 95 positioned therebetween and secured to said plate, and both rip-tracks and down-tracks bein insulated from the piloting head by the frame 69.

Extending through the back plate 50 is the rectangular opening 10, through which extends and laterally slides the arm H welded to the rear face of the main slide 54, and upon the free end iia of which arm is mounted the double armature 72, whose ends reciprocate within the coils l3 and M of the solenoids 51 and 58; the arrangement being such that the energization of One solenoid contemporaneously with the deenergization of the other will cause the main slide to move laterally to the right or left accordingly in the manner and for the purpose hereinafter described.

[is shown more particularly in Figs. 6, 'I and 8, the main slide 54 is rectangular in form and is disposed to slide within the guideway 53, with its back in sliding contact with the front face of the back plate 58; and its top and bottom sides in sliding contact with the walls of the adjacent way strips 51 and 52. Also the face of the main slide 54 is in sliding contact with the backs of the auxiliary slides 55 and 5B, the top and bottom sides of each of which are also in sliding'contact with said way strip adjacent walls; the said slides 55 and 56 and the main slide 54 being kept in their said relative positions within the guldeway 53 by the front plate 55 firmlysecured to the front faces of said way strips. Secured to or integral with the main slide 54 are the cams l0 and H; the cam 10 projecting from the top right end of said slide 54, and the cam ll projecting from the bottom left end of said slide 54,-t he oflice of which cams is shortly to be described.

As-shown in Figs. 5, 6 and 7, the auxiliary slides 55 and 55 have extending therethrough the rectangular openings 55a and 56a, through which extend and within which laterally slide the earns 59 and 6!! respectively. Also affixed. to the slides 55 and 55 are the outwardly projecting sins 570 and 5617, connected by the tension spring 63. Formed within the front plate 56, are the large recessed square or rectangular openin s 66a and 66b, through which extend the earns 59 and 50, the pins 55b and 56b, and the pivotal mountings and associated moving parts of the auxiliary slide actuators 6|v and 62.

Two duplicate stop arms 64 are attached to opposite ends of the main slide 54, in inverted relation one with the other, one of which is more particularly illustrated in Fig. 10, and which is shown to be pivotally mounted upon the elongated member 64a, that is vertically secured to the rear face of the left end of the main slide 54. Affixed to the arm 64, intermediate the ends thereof, is the block 72 of insulation material, and secured to one side of said block is the resilient upwardly extending contact finger '13, positioned to make spring contact with the fixed contact 74, mounted upon the block '5 5 of insulation material, which block is secured to the upper end of the member 64c.

Mounted one over the other in spaced relation upon the angle irons 2'6 and 21, are two sets of piloting switches, one set of which comprise:- thedown pivoting switches 25a, 25b, 23c, 25d and ZSa'afiiXed to angle iron 25, and the other set of which comprisesthe up piloting switches 21a, 27b, 21c, 27d and 27e, affixed to angle iron 27; the said switches being arranged, switch 21a for the top floor and switch 26a for the bottom floor, and one of each set for each intermediate floor and all of said switches being 5 electrically connected to call buttons and operated as hereinafter set forth. All ofthese piloting switches are of similar construction, except as" adapted for the right 'or down side or the left or up side of the piloting head. Accordingly butone of these switches, as illustrated in Figs. 5, 6 and 7 as an example, will nowbe described. Such switch, as shown, is mounted upon an angle bracket I6 firmly afiixed to the angle iron 26, and comprises, the support I1 secured to said bracket I6; the magnetic structure I8 and the coil I9 mounted upon said support; an outwardly extending 5 pin 80 secured to the upper corner of the bracket "I5, andpivotally mountedupon the said pin the armature BI, having thedownward extension 82: a closed ended tubular brushholder 83. and telescoping therewith a brush 84, normally thrust forward by the compression spring 85 within said holder and bearing against the closed end thereof, the telescoping movement of said brush being limited by the pin 86 carried thereon and engaging with the slot 37 in the wall of said holder; the post 88 secured to the bracket I6, the said post having formed therein the socket 89 shaped to receive the locking ball 90 resting upon the compression spring 9I seated within said socket, and the said ball being positioned to effect yielding locking engagement with the cup-like depressions 92 and 93 in the bottom of the extension 82 of the armature 8| upon movement thereof; and the roller 94 mounted upon the central portion of said extension and positioned to make sliding contact both with the cam II upon the end of the main slide and with the outer end of the adjacent auxiliary slide 50 as hereinafter set forth.

In Figs. 12, 13 and 14, I have shown schematically the wiring connections of my improved electro-mechanical elevator control. Here the leads extending from one side of each of the the up and down buttons [9a and 151) are shown to be connected with the common feed L2, and the other side of each of said buttons is shown to be connected with one side of the pilot switch coils A, B, C, D, E and F upon the corresponding piloting switches; the other side of said coils being connected with the common feed L1. Also connected to said common feed L1 are the brushes 84 of the down piloting switches 26a to 266, shown in the control circuit of Fig. 12 as D, E and F, and the up piloting switches 21a to He, shown in said circuit as A, B and C, and arranged to make sliding contact with either the up or down directional tracks as hereinafter described. As shown, the up directional tracks 61a and 611) are connected by lead 95 to one side of a normally closed interlock film on the down directional switch; the other side of said interlock being connected by lead 91 to one side of the coil 98 of the up directional switch and the other side of said coil being connected by lead 99 with the common feed L2. Similarly the down directional tracks 68a and 681) are connected by lead I00 to one side of a normally'closed interlock 98a on the up directional switch, the other side of said interlock being connected by lead IOI to one side of the coil 96 of the down directional switch, and the other side of said coil being connected by lead I02 with the common feed L2.

Also connected with said common feed L1 by lead I03 is one side of normally open interlock 981) on the up directional switch and one side of normally open interlock 96b on the down directional switch; the other side of interlock 98b being connected by-lead I04 to one side'of the coil I05 of the up transfer solenoid, and-- the other side of interlock 96b being connectedby lead I06 to one side of the coil I01 of the down transfer solenoid, and the remaining sides of said coils being connected by lead I08 to the feed L2.

Connected with feed L1 by lead I I I, is one side of a pair of contacts I09a of the stop switch, the other side of said stop switch being connected 'by lead H2 with one side of the coil III! of the start switch; the other side of coil IIO being connected by lead II 3 to the common feed Le. Also connected with feed L1 by lead 4 is one side of the up multiple stop switch 64; the other side being connected by lead H5 to one side of the down multiple stop switch, and the other side of said down multiple stop switch being connected by lead II6 to one side of the coil I09 of the stop switch, and the other side of said coil I09 being connected by lead Ill to the common feed L2.

In Fig. 13 is shown a special form of part of the elevator run circuit, in which, connected by lead I I8 with the common feed L3, is one side of a pair of contacts IIOa on the start switch, and one side of a pair of contacts I091) on the stop switch; the other side of each of said switches last named being connected by lead I I9 with one side of a pair of contacts 980 on the up directional switch, and with one side of a pair of contacts 950 on the down directional switch.

The operation of my invention may now be considered. When a call button is pushed, the corresponding piloting switch coil 19 is energized and the brush 84 is brought in slidable contact with one of the up directional tracks 610, or 61b, or one of the down directional tracks 6811 or 68?). If the elevator is above the floor where the button is pushed, the brush will contact one of the down directional tracks. Conversely, if the elevator is below the said floor, the brush will contact one of the up directional tracks. As shown by the elevator control circuit diagram Fig. 12, this action will cause either the up directional switch coil 98, or the down directional switch coil 96 to be energized, depending upon whether an up or down directional track has been contacted. The up 980 or the down 960 directional switch contacts will then be closed causing the elevator to run in the desired direction.

It should be noted, as shown by Fig. 12, that if an up button is pressed, contacts 98b on the up directional switch will close, causing the up transfer solenoid coil I05 to be energized. The main slide 54 of the piloting head 49 will then be moved to the left or up side. Conversely, if a down button is pressed, contacts 96b will close, causing the down transfer solenoid coil I01 to be energized. The main slide 54 will then be moved to the right or down side.

Referring now to Figs. 5, 6 and 7, it will be observed that when the main slide 54 moves from the right side to the left side of the piloting head 49 due to the action of transfer solenoid 51, the cam 60 passes under and lifts roller 62b, which action causes auxiliary slide actuator 62 to rock upon pin 62a, and to push pin 56b to the right. Since pin 56b is aflixed to auxiliary slide 56, said auxiliary slide will be moved to the right. As the cam 60 continues to move to the left, roller 621) will pass over the top of said cam and drop down. The auxiliary slide' 56 will then be returned to its original position by the action of spring 63.

In a similar manner, if the main slide 54 moves from the left side of the piloting head 48 to the right, due to the action of transfer solenoid 58, auxiliary slide 55 will be moved outward to the left and then return to its original position. It will further be observed that when the main slide is positioned to the right side of the piloting head, the cam H will be in a position such as to contact the roller 94 on a piloting switch on the right or down side of the mechanism, if said piloting switch has been energized so as to make contact between the brush 24 and one of the directional slides.

Once the elevator has started to run, it will continue to run until the brush which is in contact with one of the directional tracks slides upon one of the insulation blocks 95 or 96.

Let it be assumed that an up button at the third floor has been pushed and that the elevator is at the first floor. The coil 19 of the piloting switch corresponding to the third floor on the left or up side or" the mechanism will thereupon be energized, pulling armature 8| down and moving brush 84 outwardly to contact the up directional slide G'Ea. As already explained, this will cause the elevator to run in an upward direction. Since the piloting head at all times moves in step with the elevator, it will also move upwardly. The up directional track will therefore slide past the brush 84 until said brush slides upon the insulation block 95. will be broken and the up directional switch contact 9817 will open, causing the elevator to stop. Now, if the elevator continues in an up direction, the cam H3 will contact the roller 94 and move the brush 84 back away from the insulated block 95. This action cancels that call. If, however, the elevator goes down from the third fioor, the main slide 5% will transfer to the right side of the piloting head as already described. The auxiliary slide 55 will then contact roller 94 and move the brush 85 back, thus canceling the call.

If a down button at the third floor had been pushed, the coil E3 of the piloting switch corresponding to the third floor and on the right or down side of the mechanism would have been energized. The brush 84 would then contact the up directional slide Gib, and again cause the elevator to run in an up direction to the third floor.

As the elevator starts down from the third floor, the main slide 54 transfers to the right as already described, bringing cam 'il in position to contact the roller 94 and push the brush 8d back'canceling the call.

Let there now be considered the case where two or more call buttons have been pushed. Let it be assumed that up buttons at. the second and third floors have been pushed. There will then be two brushes contacting the up directional track 610.. As the elevator approaches the second floor, the brush oi the corresponding piloting switch will slide upon the insulating blocl; 95. This action alone, however, will not cause the elevator to stop, since the up directional switch coil 88 is still energized due to the fact that there is still a brush contacting the up directional slide 67a. As before mentioned brush slides upon the insulating block 95, the pivot-ally mounted arm 64 contacts the roller 84 of the second floor up piloting switch. This action moves contact l3 away from contact 14. Referring now to Figs, 12 and 13 the up multiple stop switch 64 is opened, stop switch coil IE9 is deenergized and stop switch contacts I991) open. The circuit to the up directional switch contacts 980 is thereupon opened and the elevator When this occurs, the circuit will stop. When stop switch coil I09 is deenergized, contacts [09a close, causing start switch coil H0 to be energized. Start switch contacts l Hla in accordance with timing mechanism therein incorporated, then close after a controlled interval of time has elapsed. The circuit to the up directional switch 980 is thereupon reestablished, causing the elevator to continue in an upward direction to answer the call at the third floor.

As the elevator moves away from the second floor, the piloting head 49 moves away from the second floor up piloting switch. The pivotally mounted arm 64 on the left end of the main slide thereby is caused to move past roller 94, allowing contact 13 again to close with contact 14. The stop switch coil I09 is then reenergized, causing stop switch contacts l09b to reclose and contacts l09a to open. When contacts l09aopen, start switch coil H0 is deenergized and start switch contacts Hila open. The run circuit is now reestablished in preparation for the next floor stop. It should be noted that here the elevator has traveled in an upward direction to make up calls, and that it has stopped consecutively at each floor where up buttons have been pressed as the car came to said floors.

Let it now be assumed that down buttons instead of up buttons had been pressed at the second and third floors. There would then be two brushes contacting the up directional track 5Tb; said brushes being mounted on piloting switches corresponding to the second and third floors and being on the right or down side of the machine. As already explained, the main slide 54 will be positioned to the left or up side of the mechanism. Therefore, as the piloting head moves upwardly the pivotally mounted arm (54 on the right end of the main slide 55 will not be in position to contact rollers 94 on the down piloting switches at the second and third floors. Under these conditions, the elevator will not stop at the second floor but will continue to run in an upward direction until the highest brush (in this case the brush corresponding to the third floor) slides upon the insulating block 95. The elevator will then stop due to the fact that no brushes are contacting the up directional tracl; 6117. After a timed interval the down directional switch coil 96 will be energized, since the brush 84 on the down piloting switch corresponding to the second floor has passed from the up directional track 61a to the down directional track 682). The down directional switch contacts 960 will then close and the elevator will run in a down direction to the second floor. It should be noted that when the piloting head is moving in a down direction, the main slide 54 will be to the right or down side of the piloting head 69. The pivotally mounted arm 64 on the right or down end of the main slide is then in position contact rollers 94 of the piloting switches on the right or down side of the mechanism, where said arm will function to stop the car in the down direction when more than one brush is contacting the down directional track 68b. Calls are cairceled as already described.

My invention may be embodied in other speciiic forms without departing from the spirit or essential characteristics thereof. The present embodiments, as above set forth are therefore to be considered in all respects as illustrative and not restrictive, the scope of my invention being indicated by the appended claims rather than by the foregoing description, and all changes which may come within the meaning and range of equivalency of the claims are therefore intended to be embraced therein.

What I claim and desire to secure by Letters Patent is:

1. In a control system for an elevator car adapted for starting and stopping the car, said system comprising electrically set piloting and mechanically reset piloting switches and two pairs of directional tracks with insulating blocks interposed therebetween for starting and stopping the car, and selector control mechanism responsive to said switches.

2. In control system for an elevator car adapted for starting and stopping the car, said system comprising electrically set and mechically reset piloting switches and two pairs or directional tracks with insulating blocks interposed therebetween, a piloting head secured to said tracks, and duplicate stop arms in inverted relation one with the other mounted upon said piloting head, and positioned to initiate the stopping of the car.

3. A control system for an elevator car, including a plurality of piloting switches and a piloting head, said system comprising means for electrically actuating and setting up said switches for starting the car, means for mechanically holding said switches in starting and running position, and means for mechanically resetting said switches by action of said piloting head.

4. A control system for an elevator car, including a plurality of piloting switches and a piloting head, said system comprising means for electrically actuating and setting up said switches for starting the car, means for mechanically holding said switches in starting and running position, and main slide means for mechanically resetting said switches by action of said piloting head.

5. A control system for an elevator car, including a plurality of piloting switches and a piloting head, said system comprising means for electrically actuating and setting up said switches for starting the car, means for mechanically holding said switches in starting and running position, and retractable cam means for mechanically resetting said switches by action of said piloting head.

6. A control system for an elevator car, including a plurality of piloting switches and a piloting head, said system comprising means for electrically actuating and setting up said switches for starting the car, means for mechanically holding said switches in starting and running position, retractable cam means and main slide means for mechanically resetting said switches by action of said piloting head.

7. A control system for an elevator car, including a plurality of piloting switches and a piloting head, said system comprising means for electrically actuating and setting up said switches for starting the car, means for mechanically holding said switches in starting and running position, and multiple slide means for mechanically resetting said switches by action of the piloting head.

8. A control system for an elevator car, including a plurality of piloting switches and a piloting head, said system comprising means for electrically actuating and setting up said switches for starting the car, means for mechanically holding said switches in starting and running position, and retractable cam and multiple slide means for mechanically resetting said switches by action of the piloting head.

9. A control system for an elevator car, including a plurality of piloting switches and a piloting head, said system comprising means for electrically actuating and setting up said switches for starting the car, means for mechanically holding said switches in starting and running posi tion, and retractable cam means and main and multiple slide means for mechanically resetting said switches by action of the piloting head.

10. A control system for an elevator car, including a plurality of piloting switches and a piloting head, said system comprising means for electrically actuating and setting up said switches for starting the car, means for mechanically holding said switches in starting and running position, and retractable cam means and main means and auxiliary multiple means for mechanically resetting said switches by action of the piloting head.

11. A control system for an elevator car, including a plurality of piloting switches and a piloting head, said system comprising means for electrically actuating and setting up said switches for starting the car, means for mechanically holding said switches in starting and running position, and retractable cam means and main and auxiliary multiple slide means for mechanically resetting said switches by action of the p lot head.

12. A control system for an elevator car, including a plurality of piloting switches and a piloting head, said system comprising means for electrically actuating and setting up said switches for starting the car, means for mechanically holding said switches in starting and running position, and retractable cam means and main and auxiliary multiple slide means and auxiliary slide actuators for mechanically resetting said switches by action of the piloting head.

13. A control system for an elevator car, including a plurality of piloting switches and a piloting head, said system comprising means for electrically actuating and setting up said switches for starting the car, means for holding said switches in starting and running position, and retractable cam means and main and auxiliary multiple slide means and auxiliary slide actuators for mechanically resetting said switches by action of the piloting head, as the elevator car after a stop has been made continues in the same running direction.

14. A control system for an elevator car, including a plurality of piloting switches and a piloting head, said system comprising means for electrically actuating and setting up said switches for starting the car, means for holding said switches in starting and running position, and retractable cam means and main and auxiliary multiple slide means and auxiliary slide actuators for mechanically resetting said switches by action of the piloting head, as the elevator car after a stop has been made moves away from a floor in a direction opposite to that in which said car was running before making said stop.

ALONZO W. NOON.

REFERENCES CITED The following references are of record in the file of this patent:

UNITED STATES PATENTS Number Name Date 2,009,395 Gale July 30, 1935 2,482,529 Williams Sept. 20, 1949

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