US949740A

US949740A - Alternating-current elevator aparatus.

Info

Publication number: US949740A
Application number: US37542907A
Authority: US
Inventors: David Larson
Original assignee: Individual
Current assignee: Individual
Priority date: 1907-05-24
Filing date: 1907-05-24
Publication date: 1910-02-15
Anticipated expiration: 1927-02-15

Description

D. LARSON. ALTERNATING CURRENT ELEVATOR APPARATUS. AVPPLIOATION FILED DIG/0.19, 1905. RENEWED MAY 24,1907.

Patented Feb. 15, 1910.

3 SHEETSSHEET 1.

v v WITNESSES:

ATTORNEY D. LARSON I ALTERNATING CURRENT ELEVATOR APPARATUS. APPLIOATION FILED DBO.19, 1905. RENEWED MAY 24,1907.

949,740. Patented Feb. 15,1910.

3 SHEETS-$111131 Z.

ATTORNEY 1 D. LARSON, ALTERNATING CURRENT ELEVATOR APPARATUS. APPLICATION FILED 1330.19, 1905. RENEWED MAY 24,1907.

9419,7405 Patented. Feb.15,11910.

' 8 SHEETS-SHEET 3.

WITNESSES:

IN MY N 70/? UNITED STATES gg NT OFFICE.

DAVID LARSON, OF YONKEBS, NEW YORK.

summarise-concur ELEVATOR arraimrus.

Specification oLLetters latent. Patented Feb. 15, 1910.

Applioation flled December 10, 1805, Serial Io. 298,485. Renewed Kay 24, 1907. Serial No. 375,428.

To all whom it may concern:

Be it known that I, DAVID Larson, a sub ject of the King of Sweden, and a resident paratus.

of Yonkers; in the county of Westchester and State of New York, Umted States of America, have invented certain new and useful Improvements in Alternatin -CurrentElevator Apparatus, of which t e following is a specification.

My invention relates to alternating current elevator a paratus and its object is to provide a simp e and efficient stem of this type which can be used in con unction with single-phase currents and which can have its entire operation cont-rolled electrically fil'om a source of single-phase current supp z My invention conslsts further in certain improvements in construction and arrangement of parts, all of which will be described in the followin specification and the novel features thereo pointed out in claims.

Referring to the drawings, Fi re 1 shows in side elevation an elevator hoisting appa- 4 ratus with various connected parts and certain other apparatus and electrical circuits shown diagrammatically. part of my apparatus in side elevation and Fig. 3 is an endview of the same device. Figs. at and 5 are, respectively, side and end elevations of a pilot-switch which I use in carrying out my invention. Fig. 6 is a side elevation, with certain parts broken away, of an electromagnetic actuating device which may be used to control a brake and other apparatus. Fig. 7 is an end elevation of the parts shown in Fig. 6. Fig. 8 is a view of a modification of a part of my invention.

Like characters ,of reference designate corres onding parts in all of the figures.

10 cesignates an electric motor which is mechanically connected to the hoisting ap- It is here shown as a series-wound commutator motor adapted for use in conjunction with sin le-phase currents. Its field 11' is preferalfiy constructed of laminated magnetic material as is also its armature 12.

13 and 14 designate brushes which bear upon the commutator 12 of the motor.

15 is the motor shaft. To one end of this shaft is securely attached a pinion 16 which is arranged to be in mesh witha gear 21 which is securely attached to a winding drum 20. At the other end of shaft 15 a Fig. 2 shows one.

drum and which run up and over a sta'-.

tionary sheave 23 situated above the upper limit of the travel of the elevator-car 24 to which the cable is attached. 25 is another cable, one end of which is attached to the winding drum 20. It runs up and over a stationary sheave 26; and down to a counterweight 27 to which it is attached. The

ropes

22 and 25 are wound upon the winding drum 20 in opposite directions so that when the drum 20 is rotated in one direction or the other one of these ropes-will be wound upon the drum 20 at the same time that the other is unwound from the drum.

30 and 31 designate mains from a suitable source of alternating current supply. These mains, after passing through a manually operated switch 32 and fuses 33 and 34, may be connected to the primary 35 of a regulating transformer 36. The secondar 37 of this regulating transformer may e connected by' various conductors to the difierent parts of the apparatus which will be pointed out later. Two

secondary mains

40 and 41 may be connected res ectively to the mainline conductors 30 an 81 and, after passing through a manually operated switch 42, may be connected to the primary 45 of a secon transformer 46. This second transformer is entirely separate and independent of the regulating transformer 36. Its sec ondary 47 may be connected to the operating circuits of the controlling system by the

conductors

48 and 49.

50 designates a manually operated switch which is referably situated'in the elevatorcar 24.' his switch comprises a lever 51 which is pivoted at 52 and which bears upon a stationary contact 53. The conductor 2-8 is connected to this contact 53. Thetlever 51 may be moved to the left or to the right and in so doing connects stationary contact 53 with either stationary contact 54.- or stationary contact 55. a

60, and designate electric actuators. The actuator 60 comprises a stationary frame 61 constructed of laminated ma etic material and a rotatably pivoted mem er or armature 62, also constructed of laminated magnetic material, which is arranged to be vertical position.

other direction. contact which is connected to but insulated moved by the magnetic influence of the frame 61 when the latter is energized. 63 and 64 are coils which are placed upon projecting pole-pieces which are a part of the magnetic frame 61 and which are arranged to magnetize the frame 61 when an electric current lssent through them and in so doing to rotate the armature 62. An arm 62 is connected to armature 62 and carries upon from the upper end of the pivoted-arm 65. This contact 66 is arranged to be moved into and out of contact with a stationary contact 67. This stationary contact may be constructed, if desired, in a manner'shown in Figs. 1 and 2 with two contact faces 67 and 67 mounted upon springs as shown to insure their making a firm contact with contact 66, when the latter is moved against them. The actuators 70 and 80 comprise similar parts. Before pointing .1 out the other apparatus'which I use I will refer to Fig.2 and describe the operation of one of these magnetic actuators. When'the apparatus is not in use the various parts will take the relative positions in which they are shown in this figure. Now, if an electric current is sent through

coils

63 and 61 so that the magnetic frame 61 is energized thereby, the rotatable member or armature 62, which is placed within the magnetic in-' fiuence of the magnetic lines in the frame 61,

will be drawn thereby into an approximately Its tendency will be to include as many of the magnetic lines as possible, and it will be moved, as just described, against the influence of the weight 62 which has a tendency to hold it in the position in which it is shown in Fig. 2. It will, however, reach a state of equilibrium between the pull of the magnetic lines and the effect of the weight 62 and will remain in its new position as long as the current continues to flow through

coils

63 and 64. In this new position the anti-friction roller 62 will be raised up and away from the pivoted arm and the latter will be. left free to move under the influence of spring 65 until its contact 66 will meet the stationary contact-piece 67. In this new position the anti-friction roller 62 will be out of contact with the pivoted arm 65 so that any vibration which the armature 62 and its connected parts may havejcn account of the current fluctuations will not be transmitted to the pivoted arm 65. This will have the advantage of making the apparatus noiseless and of avoiding all chattering and s arking between the

contacts

66,and 67. j W ion the current is cutoff from coils 63 and (5 1 the weight 62 will return the parts'to their original positions and the anti-friction roller 62 willforce the contact 66 away from the stationary contact-piece 67.

90 designates a safety relay, the various parts of which are similar to those of the actuators 60, and 80 above described.

100 designates another form of magnetic actuator which is used in this case to control the operation of a brake and of certain other a paratus. Referring to Figs. 6 and 7, I wil describe the construction and operation of this actuator. It comprises a magnetic frame 101 and a pivoted rotatable member or armature 102. These parts are preferably constructed of laminated magnetic material. Two

coils

103 and 104 are provided and arranged to energize the magnetic frame 101 when a current is passed through them. When the magnetic frame 101 is energized it will attract the armature 102 and have a tendency to bring the latter into a horizontal position. Crankarms 102 102 are connected to the pivot of the armature 102 and arranged to move with the armature. These crank-arms 102 102 are connected by means of connecting rods -11() to a slidin member 111. A spring 112 is compressed etween the lower ortion of the magnet frame 101 and this Sll( ing memher 111. When the armature 102 is rotated by the action of the magnetic lines set up in magnetic frame 101 by a current passing through its

coils

103 and 104, the sliding member 111 will be raised thereby and will compress spring 112. At the same time the crank-arms 102 102 will be raised into a nearly vertical position so that the pressure of the spring 112 will be shifted onto the pivot of armature 102 as the armature is rotated. In this way the load which armature 102 controls will be removed from the armature as the armature performs its work. It is desirable to prevent these crank-arms 102 102 from reaching a vertical position and for this reason a sto 102 may be provided. This is provide so that when the current iscut oil from the coils 103 and 10-1- the pressure of the spring 112 will bring the parts back again to their original positions. 113 designates a brake-lever which is pivoted at 113 and to which brake-shoe 19 18 connected. A rod 114 is also connected .to the brake-lever 113 and to an auxiliary is raisedabove the end of brake-lever 113 pressed down upon the end of brake-lever 113 by the spring 112, and when it is thus pressed by the spring 112 it will push the brake-shoes 18 and 19 upon the brake-pulley 17. When, however, the spring 112 is compressed by the magnetic actuator 100, as above described, and the sliding piece 111 the latter will be raised by another spring 116 which is provided for this purpose and the brake-shoes 18 and 19 will thereby be releasedfrom the brake-pulley 17. It may be seen that when the actuator 100 is deenergized the spring 112 will again press down upon brake-lever 113 and thereby apply brake-shoes .18v and 1.9 to the brake pulley 17. A lever 117, which may be pivoted at 1117 to a stationary point supported by the frame of magnetic actuator 100, may

in the position in which it is shown in Fig.

and to allow a sprin contacts 128 and 129.

lever 142 and to thereb 1, and that when the actuator 100is energizedthe movable end of lever 117 will be raised by it.

120 and 130 designate two other magnetic actuators similarto magnetic actuator 100, and the parts which they have in common need not be fully described again. In this case magnetic actuator 120 is arranged, when energized, to com ress a spring 122 and to thereby raise a siding member 121 126 to raise a crossarm 127, which carries upon it but insulated from it two contacts 128 and 129."

These are arranged to be raised by a spring 126 into electrical contact with two stationary contacts 128 and 129*. When the actuator 120 is deenergized the sliding member 121 will again be pushed down by the spring 122 and will compress sprin 126 and push contacts 128 and 129 awa rom stationary agnetic actuator 130 comprises similar parts and its operation is similar to that of the magnetic actuator 120. I

140 is a mechanical actuator which is both electrically and mechanically controlled. It comprises a spring 141 which is arranged to raise an arm 142 of a three-armed pivoted ush the arm 142 of this lever over to the e t and the arm 142 of this lever over to the right. Whenthe various parts are not. in use this movement of the various parts is prevented by the lever 117 which is held in the position shown in Fi 1 by the spring 112 and which is directly over a projection 143 on a rod 143 which is a part of the mechanical actuator 140.

which is also a part of the mechanical acis its piston. This piston 145 is connected to the rod'143 and is arranged to retard its. upward movement.

146 is the frame of a magnetic retarder tuator 140. This frame 146 is constructed of laminated magnetic material and is provided with an energizing coil 147 and a core 148.

150 is a sliding member supported by

brackets

151, 151 and is provided with gearteeth along its upper surface. These gearteeth are arranged to mesh with four

gears

152, 153, 154 and 155 which control various apparatus which will be described later. It may be seen that the sliding-member is moved to the left or right by means of the mechanical actuator or by the lever 117. It has been shown that this lever 117 is moved by the brake actuator 100. It may, however be arranged to be actuated by an inde pendent magnetic actuator 100 as shown in Fig. 8, in which case the lever 117 is moved directly by the armature 102' of the actuator and independently of the operation of the brake.

160 designates a selective pilot-switch which is shown somewhat in detail in Figs. 4 and 5. This switch comprises a movable contact-member 161 which is mounted upon 95 but insulated from the gear 152 and one portion of which has bearing up it a stationary brush 162. Its other end is adapted to contact successively with any one of three

stationary brushes

163, 164 and 165 which control the operation of

magnetic actuators

60, 70 and .80,'respectively.

The gear 153 is situated under the magnetic actuator 60 and carries upon its surface two

cam members

153 and 153 The pivoted arm 65 may be provided with a proecting portion 65 and this portion may carry an anti-friction roller upon it. The cam member 153* is arranged to be moved under this projecting portion 65 and to push pivoted arm 65 over until its contact 66 is brought against contact-piece 67, if, for any reason, the electrical operation of the actuator 60 has failed to move the arm 65 over. The cam member 153 is arranged toact upon the upper portion of the friction roller upon the projecting portion 65 and to thereby move the pivoted arm 65 back again to its inoperative position ifthe magnetic actuator 60' fails to perform this function. The

gears

154 and 155 are provided with similar cam members and perform similar functions. These parts are so arranged and adjusted that they do not have any effect whatever if the

actuators

60, 70 and 80 perform their functions properly but are added as a safeguard and to insure the proper operation of the parts if any part of the operation of the actuators fails.

144 is the cylinder of a dash-pot and 145 i I have pointed out the various apparatus which I use in carrying out my invention and have described the 0 ration of some of them. I will now descri the operation of the system as a whole.

I have shown that the transformer 46 supplies current to the operating circuits of the system. The voltage which it supplies may be of any desired strength as it 1s entirely independent of the motor circuits and therefore may be arranged to be quite low and entirely free from danger to persons in the car or to others using the system. The current supply for the operating circuits is led through the

auxiliary mains

48 and 49. 48 is connected to stationary contact 53 of the car-switch by a conductor 53. Now, if an operator moves the lever 51 to the left and thereby bridges

contacts

53 and 54, a circuit will be completed from this main 48 through conductor 53,

contacts

53 and 54, which are now bridged by lever 51, through conductor 54 to and through the coils of magnetic actuator 120; thence by conductor 96 to and through

conductors

96 and 97 which are now held together in a manner which I will presently describe; thence by conductor97 to and through the coils of the safety relay magnetic actuator 90 and then to the other auxiliary main 49. The circuit thus completed will energize magnetic actuator 120 and cause it to close movable contacts 128 and 129 against stationary contacts 128 and 129", and will also cause the'safety relay actuator 90 to move its armature and raise its anti-friction roller 92 up awa from its pivoted arm 95. Another circuit will at the same time be closed from the auxiliary main 48, ,which is connected to the

coils

63 and 64 of magnetic actuator 60, through these coils and through conductor 63 to contact 163 of the ilot-switch 160. This pilot-switch will then e in position to connect the brush 163 to the contact 162 and the coil 14? the this contact 162 is connected as shown by a conductor 49 to the auxiliary main 49. Consequently, a circuit will be closed through magnetic actuator 60 and it will be energized thereby and cause contact 66 to be closed against stationary contact 67 in the manner previously described. When the parts are at rest it may be seen that the arm 142 of the three-armed lever 142 is held against the pivoted lever 95 of the safety rela actuator 90, and, when in this position, hol s

contacts

96 and 97 together.

The effect of the operations just described will be to close circuits through the motor 10 and cause the latter to begin to rotate in one direction. I will now trace out the motor circuits which are thus closed. Beginning at the source of supply it may be seen that the conductor 38, which leads from one side of the secondary of regulating trans former 36, is corms to the upper side of static retarder in the mechanical actuating device which I will now call the motor accelerator 140. The circuit will now be completed throu h this coil 147 through conductor 147*, t ugh the field-windings of motor 10, and by conductor 11 to contact 129 against which contact 129 is now closed. The path of the circuit continues throughconductor 13 to brush 13 of the motor, through the motor armature 12 out at brush 14, and through conductor 14 to contact 128 which is now closed against contact 128, and thence through conductor 66 to contact 66, through

contacts

66 and 67 and conductor 38 to t e re latin transformer 36. Thus a portion on y of t e secondary of regulating transformer 36 is connected to the motor 10 and will cause the latter to rotate slowly; at the same time, a circuit will be com leted through the

coils

103 and 104 of the rake actuator 100 because the lead 103 from these coils is connected to conductor 38 and the lead 104 is connected to conductor 66. The brake-actuator 100 will therefore release the brake-shoes 18 and 19 from the brake-pulley 17 and at the same time will raise the pivoted lever 117 away from the projection 143 of the accelerating device 140. This will leave the accelerating device free to act and the spring 141 will then push the rod 143 upward. This will move the three-armed lever 142 and will also move its arm 142 away from pivoted arm 95 and will move its arm 142 to the left. This movement will be retarded by the dash-

pot

144 and 145 and also by the magnetic retarder 146. The effect of this magnetic retarder will be proportional to the movement of current passing through the motor and may be arranged to be reat enough to prevent any movement of t e rod 143 when the motor current is excessive. ,When the arm 142 is moved to the left this will cause the sliding-rack 150 to be moved to the left and to rotate the gears 152; 153, 154 and 155 in one direction. The first effect of this will be to move pilot-switch 160 in such a direction as to connect its

contact

162 and 164 through the portion 161. This will first complete a circuit throu h ma netic actuator and will then brea the circuit through magnetic actuator 60 by the portion 161 moving out of contact with brush 163. Magn 70 will then close its contact 76 against its stationary contact 77 and will connect the portion of the regulating transformer included between

conductors

38 and 38 to the motor 10 in a manner similar to that pre- I etic actuator magnetic actuator 70 closes its cont-acts and betore the time when magnetic actuator 60 opens its contacts. The motor will thus receive currentfrom the line at a greater volmagnetic actuator 80 to close its contacts 86 and 87 and then cause magnetic actuator 70 to separate its contacts 76 and 77. This will then cause the whole of the secondary of regulating transformer 36 included between.

the conductors38 and 39 to be connected to the motor 10 and it will then receive current at the full voltage of the regulating transformer 36 and attain its maximum speed.

It has been pointed out that gears 153, 154

and 155 rotate in unison with gear 152.

These gears-153, 154 and 155 carry upon them cam members such as 153 and 153 which act in conjunction with the projecting portions carrying rollers such as 65", and these cam members are arranged to mechanically operate the pivoted

arms

65, 75 and 85 of the magnetic actuators. The pilot-switch 160 is so adjusted and timed as to make and break the electrical circuits to these actuators slightly in advance of the operation of these cam members so that the latter do not perform their function, unless, for some reason'or other, the electrical operation of these actuators does not properly work. The mechanical operation of the actuators is therefore merely added as a safeguard and to make the operation positive a'ndsure.

It is evident that when the motor 10revolves through its connecting mechanism it will impart movement to the elevator-car 20. lVhen the operator desires to stop the car he will bring the pivoted lever 51 of the carswitch 50 back to its central position. The circuits previously described through mag netic actuator 120 and safet relay actuator 90 will bebroken. This wi 1 cause the contacts 128 and 129 to drop away from contacts 128 and .129 and will break the circuits. to the motor and to the brake-actuator 100. The current supply will thus be cut off from the motor and the brake will be applied to it so that the motor and its connected parts will come to rest. The pivoted lever 117 will pu sh down the rod 143 of the accelerator 140 and will thereby slide the rack 150 to the ri ht; This will cause pilotswitch 160-to be fought back to its initial position and will'cause contact 96 of safety relay actuator 90 to be closed against stationary contact 97. Now, if the operator desires to causethe motor 10 to rotate in the opposite direction and to thereb cause .the car 24 to move in the opposite direction he may do so by moving pivoted lever 51 to the right onto stationary contact 55. The operation of the various parts will-be similarto that already described but in this case ma netic actuator 130 will cause the contacts 111K er it to be closed.

It may be seen that should the operator move the pivoted lever 51 to the right quickly no circuit can be closed through magnetic actuator 130 until the various parts have been brought back to their initial positions,- because the

contacts

96 and 97 of safety relay 90 will be opened and no circuit can be applied through this safety relay or through either of the

magnetic actuators

120 and 130 until this contact has been closed by the arm 142 and this arm will not close these contacts until the parts are in the proper position for again startingthis system.

In starting the motor the coil 147 of the magnetic retarder, which coil is in the motor circuit, and which acts upon a'core 148, will also perform another. function, because as this core is raised out of the coil it will allow more current to pass through the coil. Therefore this coil itself acts as an o position element in the motor circuit an vents an excessive inrush of current to the motor in starting. g

' The combination which I use, of arcgulating transformer with quick acting circuitbreakers, is a distinct improvement over former devices of this kind as it does away with the sparkin which is common with sliding cont-acts. fills is of reat value, especially when applied to such lard service as that of an elevator controller.

My improved actuators which I use for controlling the brake and the circu t-closers make sucha paratus noiseless and are arranged to ho d the various parts which-they control firmly together without chattering.

Inmany places only a single-phase current is obtalnable and this system 1s particularly adaptable for elevator installation in such places, because it furnishes a complete system which is entirely electrically pre- controlled without additional appliances as the motor may be furnished with a suitable voltage both for startin'gfand for regulating its speed. I believe it is! broadly new towntrol an opposition element in a sin. le-phase motor circuitby the combination o a regu-' lating transformer, and an inductive dev ce which is arranged to controlthe regulating transformer bythe variation of the current in the motor circuit and at the same t me inductively. cooperate with the regulating transformer to automatically control the mohas been obviated. I believe that this is the first system which embodies a complete single-phase control for a single-phase motor tor current in proportion to the acceleration of its armature. I

It has formerly been diflicult to design a satisfactory system for single-phase circuits because of the inefficiency of the apparatus formerly used and the devices hit erto in, use have also been undesirable because of their noisiness which in the present system with a single-phase brake without the addition of any auxilia devices, and WhlCh is complete in its design and efiicient in and a single-phase circuit for the winding,

said motor winding and brake winding arranged to be concurrently energized during the run of the motor.

3. An alternating current single-phase motor, an electrically actuated brake, a winding for the brake, a single-phase circuit for the windingand a manually operated controlling switch for the motor and the brake, said motor winding and brake winding arranged to be concurrently energized during the run of the motor.

1. A single-phase alternating current motor, a starting switch arranged to be actuated by a single-phase current, a singlephase brake and a single-phase controlling device, said motor, starting switch, brake and controlling device arranged to be concurrently energized during the run of the motor. I

5. A single-phase alternating current motor, a reversing switch therefor arranged to be actuated by a single-phase current, a single-phase brake and a single-phase contro 'ng device, said motor,-revers1ng switch, brake and controlling device arranged to be concurrently energized during the run of the motor.

6. A single-phase alternating current motor, an electrically actuated reversing switch therefor, a brake and a controlling 7 device, and. singlebase circuits for the reversing switch, the rake and the controlling device, said circuits arranged to be concurrently energized during the run of the motor.

7. A single-phase alternating current motor, an electrically actuated reversing switch therefor, a brake and a controlling device, single-phase circuits for the mvers-' ing switch, the brake andvthe controlling device, and a manually operated switch for controlling the single-phase current in said.

circuits, said circuits arranged to be concurrently energized.

8. A single-phase alternating current motor, a single-phase brake therefor, a

transformer arranged to supply current to A the motor and the brake; a single-phase controlling device and an transformer, having an entirely metallic secondary circuit disconnected from said first transformer arranged to supply current to the controlling device.

. 9. A singlephase alternating current motor, a single-phase brake therefor, a transformer arranged to supply current to independent the motor and the brake, a switch for said transformer, a single-phase controlling device, an independent transformer having an entirely metallic secondary circuit disconnected from said first transformer arranged to supply current to the controlling-device and a switch for said independent transformer.

10. A singlephase alternating current motor, a single-phase brake therefor, a regulating transformer arranged to supply current to the motor and the brake, a switch for said regulating transformer, a single-phase controlling device, an independent transformer having an entirely metallic second ary circuit disconnected from said first transformer arranged to supply current to the controlling device and a switch for said inthe controlling device and a switch for said independent transformer.

12. A series single-phase commutator motor, a single-phase brake therefor, a regulating trans ormer arranged "to supply current to the motor and the brake, a single-phase controlling device for the motor and an independent transformer having an entirely metallic secondary circuit disconnected from said first transformer arranged to supply current to the controlling device.

13. A singlephase alternating current motor, circuits for the motor, an electrically actuated brake, a winding for the brake, a single-phase circuit for the Winding, a starting switch having contacts which control the motor c rcuits and the brake circuit, said circuits being arranged to be concurrently energized during the run of the motor.

" 14. A' single-phase alternating current brake, a single-phase circuit for the winding, an electrically actuated reversing switch having contacts which control the motor circuits and the brake circuit, a single-phase circuit for the reversing switch, said motor circuits, brake winding circuit and reversing switch current being arranged to be concurrently energized and a manually operated switch arranged to control the reversing switch.

15. A single-phase alternating current motor, circuits for the motor, an electrically actuated brake therefor, a winding for the brake, a single-phase circuit for the winding, an electrically actuated reversing switch having contacts which control the motor circuits and the brake circuits, a. single-phase circuit for the reversing switch, said motor circuits, brake winding circuit and reversing switch circuit being arranged to be concurrently energized, a manually operated switch arranged to control the reversing switch, a transformer arranged to supply current for the motor circuits and the brake circuitand an independent transformer arranged to supply current for the circuits of the reversing switch. I

16. A single-phase alternatin current motor, circuits for the motor, an e ectrically actuated brake therefor, a windin for the brake, a,singlephase circuit for t e winding, an electrically actuated reversing switch having contacts which control the motor circuits and the brake circuit, a singlephase circuit for the reversing switch, said motor circuits, brake winding circuit and reversing switch circuit being arranged to be concurrently ener ized, amanually operated switch arrange to control the reversing switch, a regulating transformer arranged to supply current for the motor cir cuits and the brake circuit and an inde-' pendent transformer arran d to supply current for the circuits 0 the reversing switch,

17. In an elevator, at hoisting mechanism,

a single-phase motor, a brake, and a singlephase magnet for the brake, said magnet having a magnetically equilibrated arma ture.

18. In an-elevator, a hoisting mechanism, a single-phase motor, circuits therefor, a brake, a windingv for the brake, a sin lephase circuitfor the brake-winding an a ,magnetically equilibrated armature within the brake-winding.

19. In an elevator, a hoisting mechanism, a single-phase alternating current motor, a sin le-phase brake and a single-phase contro ling device for the motor and the brake, said motor, brake and controllingdevice arranged to be concurrently energized during :the run of the motor.

20. In an elevator, a source of singlephase alternating current supply, a singlephase alternating current series motor, a

. hoisting mechanism, a. brake and a controlling device, said motor, brake and controlling device, arranged to be concurrentl Y energized from the single-phase source o supply during the run of the motor.

21. In an elevator, a hoisting mechanism, a motor for said hoisting mechanism, abrake for said hoisting mechanism, controlling means for the motor and the brake. said means arranged to be electromagnetically energized from a source of singlephase alternating current supply during the time the motor is energized.

22. In an elevator, a hoisting mechanism, a single-phase alternating current motor, an electrically actuated reversing switch 'for the motor, a brake and a controlling device.

a car and a motor, a brake. and a controlling device, said motor, brake aiid controlling device arranged to be concurrently energized during the run of the motor and actuated from the single-phase source of supply, and a manually operated switch in the car arran ed to govern the motor, brake and controlling device.

24. In an elevator, a hoisting mechanism, a single-phase motor, circuits therefor, an electrically actuated brake, a winding for the brake, a single-phase circuit for the brakewindin a motor-controlling device and manual y operated means for controlling the movement of the motor, said circuits being arranged to be concurrently energized dur-. ing the run of the motor.

25. In an elevator, a hoisting mechanism, a single-phase alternating current motor, an electrically actuated reversing switch for the motor, a brake, a controlling device,

single-phase circuits for the reversing switch, the brake and the controlling device, said circuits being arranged to be concurrently energized, and a manually operated switch in said circuits.

26. In an elevator, a hoisting mechanism, a single-phase alternating'current motor, circuits for the motor, an electrically actuated brake therefor, a winding for the brake, a single-phasecircuit for the winding, said circuits being arranged to be concurrently ener ized during the run of the motor,'and a starting switch having contacts which control the motor circuits and the brake circuit.

27. In an elevator, at hoisting mechanism, a car, a singlephase alternating current motor, circuits for the motor, an e ectrically actuated brake, a winding for the brake, a

single-phase circuit for the windin an electrically actuated reversing switc havin ranged to be concurrently energized during the run of the motor, and a manually operated switch in the car arranged to control the reversing switch.

28. In an elevator, a hoisting mechanism, a car, a single-phase motor, a brake, a winding for the brake, a controlling device for the motor, said motor, brake, winding and controlling device arranged to be concurrently energized during therun of the mot or, manual y operated means in the car for controllin the controlling device, and

electrical circuits between the controlling de- V vice and said manually operated'means.

29. In an elevator, a hoisting mechanism, a single-phase alternating current motor and a single-phase brake-actuator, said motor and actuator having laminatedfields and arranged to be concurrently energized during the run of the motor. I

30. In an elevator, a hoisting mechanism, a single-phase commutator motor having laminated magnetic fields and a single-phase brake, said motor and brake arranged to be concurrently energized during the run of the motor.

31. In an elevator, an electrically actuated brake, a hoisting mechanism, a car, an alternating currentgnotor, a source of alternating current .su ply, a circuit for the motor and control ing means in the motor 7 circuit comprising a regulating transformer.

e sai 'aicar, alternating current motor, a source 32. In an elevator, a hoisting mechanism, acar, an electrically actuated brake, a SHI- gle-phase alternatingcurrent motor, a circuit for said motor, a source of alternating current for the motor, and a regulating transformer in the motor circuit.

33. In an elevator, a-hoistin mechanism, a car, an electrically actuated brake, an alternating current motor having a laminated magnetic field and armature, a windin for field and armature, circuits there or, a source of alternating current supply and a regulating transformer for the motor and the circults.

34,,In an elevator, a hoisting mechanism,

o f alte'rnating current supply for the motor, a regulating transformer, circuit-closers for the regulating transformer, said circuit closers arranged to be operated by a single-;

phase current.-

35. Inan elevator, an electrically actuated brake, a hoisting mechanism, a 'car, an alternating current motor, windings and circuits for the motor, a source of alternating current supply for the circuits and windings, a regulating transformer 1n the circuit, a circuit-closer for the regulatlng transformer,

said circuitcloser arranged to be operated by a single-phase current. contacts which control the motor circuits an the brake circuit, said circuits being ar- 36. In an elevator, a hoisting mechanism,

a motor, a brake, a regulating transformer,

control the brake and the action of the circuit-closers.

37 In an elevator, a hoisting mechanism, a motor, a brake, a re lating transformer, circuit-closers for sup ying a variable voltagefrom said trans ormer .to the motor,

.means for actuating the circuit-closers oneby one, an electromagnetic actuator havm a movable armature, said armature arrange to control the'brake and the action of the circuit-closers. I

38. In an elevator, a hoisting mechanism, a car, a motor, a brake, a regulating transformer, circuit-closers for supplying a variable voltage from said trans ormer to the motor, meansv for actuating the circuitclosers one by one, an electromagnetic actuator having a movable armature, said armature arranged to control the brake and the action of the circuit-closers, circuits forcontrolling the circuit-closer actuating means and a manually operated switch in the car.

39. In an elevator, a hoisting mechanism, a car, a motor, a brake, a regulating transformer, circuit-closers for sup lying a variable voltage from said trans ormer to the motor, means for actuating the circuitclosers one by one, an electromagnetic actuator having a movable armature, said armature arranged to control the brake and the action of the circuit-closers, circuits for electrically controlling the circuit-closer actuatin means and mechanism for mechanical y controlling the circuit-closer actuating means, and a manually operated switch in the car.

40. In an elevator, an electrically actuated brake, a hoisting mechanism a motor, a

brake, a regulating transformer electricallyactuated circuit-closers for sup lying a var1- able voltage from said trans ormer to the motor, single-phase circuits for the circuitclosers, an electromagnetic actuator havin a movablearmature, said armature arranged to control the brake and the action of the circuit-closers. I e 4 41. In an elevator, a-hoisting-mechanism,

a motor, a brake, a regulating transformer, electrically actuated circuit-closers for supplying a variable voltage from said transformer to the motor, smgle-phase circuits for the circuit-closers, a pilot-switch arranged to actuatelthe circuit-closers one by one and an electromagnetic actuator arranged to' control the brake and the pilotswitch. .7

42. In an elevator, a hoisting mechanism, a motor, a brake, a regulating transformer, circuit-closers for sup lying a variable voltage from said trans ormer to the motor, means for electrically actuatin the circuitclosers and additional means or mechanically actuating the circuit-closers.

43. In an elevator, a hoisting mechanism, a motor, a brake, a regulating transformer, circuit-closers for sup lying a variable voltags from said trans ormer to the motor, means for electrically actuating the circuitcloscrs one by one and additional means for mechanically actuating the circuit-closers 1 one by one.

i i. In an eievator, a hoisting mechanisi a n'iotor, a brakes regulating transformer, circuit closers for supplying a variable voltage from said transformer to the motor, means for electrically actuating the circuitclosers one by one, additional means for mechanically actuating the circuit-closers one by one, and an electromagnetic actuator having a movable armature, said armature arranged to control the brake and the action of the circuit-closers.

45. In an elevator, a hoisting mechanism, a motor, a brake, a regulating transformer, circuit-closers for supplying a variable voltage from the transformer to the motor, and an electromagnetically actuated accelerator arranged to actuate the circuit-closers one by one.

46. In an elevator, a hoisting mechanism, a motor, a brake, a regulating transformer, circuit-closers for supplying a variable voltage from the transformer to the motor, an electromagnetically actuated accelerator arranged to actuate the circuit-c1osers one by one and a mechanical retarding the accelerator.

47. In an elevator, a hoisting mechanism, a motor, a brake, a regulating transformer, circuit-closers for an plying a variable voltags from the transf drmer to the motor, an accelerator arranged to actuate the circuitclosers one by one, and electrical means for retardin the action of the accelerator, said electrica means having a retarding effect upon the action of the accelerator. proportional to the current in the motor.

48. In an elevator, a hoisting mechanism, a motor a brake, a re latin transformer, electrically actuated circuit-c osers for suplyinga variable voltage from said transormer to the motor circuits for the circuitclosers, a pilot-switch in said circuits and an accelerator arranged to actuate the pilotswitch; an electromagnetic actuator havin a movable armature, said armature arranged to control the brake and the action of the 49. In an elevator, a. hoistin mechanism,- a. car, a. motor, a. broke, a reg la device for ting'trane,

former, electrically actuated circuit-closers for supplying a variable voltage from said transformer to the motor, circuits for the circuit-closers, a pilot-switch in said circuits and an accelerator arranged to actuate the accelerator controlling device, a brake and a single-phase magnetic actuator for the brake,

5L In an elevator, a hoisting mechanism, a single-phase alternating current motor having laminated magnetic fields, a brake, a magnetic actuator for said brake, said. actuator having laminated magnetic fields and a pivoted armature, and a szngiechase circuit for said brake actuator, said rake sir-- cuit being arranged to be energized during such time as the motor is energized.

52. In an elevator, a hoisting mechanism, an alternating current motor, controlling means for the motor circuits for the con trolling means and the motor, a source of alternating current supply, a brake, an alternating current magnetic actuator for controlling the brake, windin s and circuits for said actuator asource 0 alternating current su py for same, said actuator having an equi 1 rated armature.

53. In an elevator, a hoisting mechanism, a single-phase alternating current motor, single-phase controlling means for the motor, a brake, a single-phase magnetic actuator 'for operating the brake, intermediate mechanism arranged to diminish.the load of the a brake on the actuator as the actuator moves the brake.

54. In an elevator, an electrically actuated brake, a hoisting mechanism, a motor, c1rcuits therefor, an alternating current supply for the motor, a re ating transformer n the motor circuits, mductive means 1n said motor circuits, said inductive means and regulating transformer arranged to conjunctively control the current m the motor circuits.

55. In an elevator, an electrically actuatedbrake, a hoisting mechanism, a motor, circuits therefor, an alternating current supply for the motor. and the; circuits, a regu ating transformer in the motor clrcuits, 1n-.

ductive means in said motor circuits, said inductive means and regulating transformer arranged to oonjunctively control the current in the motor circuits in proportion to the speed of the motor.

i 56; In an elevator, an electrlcall actuated brake, a hoisting mechanism, an a ternatmg current motor, circuits for the motor, a

source of alternating current supply for the motor, a re lating transformer in the motor circuits, an an inductive device ada ted to control the current regulating transi 57. In an elevator, an electrically actuated brake, a hoisting mechanism, an alternating current motor, circuits for the motor, a source of alternating current supply for the motor, a regulating transformer in the motor circuits, circuit-closerstherefor, and an in ductivedevice adapted to control the circuit-closers, said inductive means and circuit-closers being mechanically connected .together. v

58. In an elevator, an electricall actuated brake, a hoisting mechanism, an a ternating current motor, a source of alter nating current supplyincircuits for said motor, means for control g the supply to the motor, said means comprising a regulating transformer and an inductive-reactin device.

59. In an elevator, an e ectricall actuated brake, a hoisting mechanism, an a ternating current motor, windings and circuits there for a source of alternating current supply an an inductive reacting device in the motor circuitsarranged to control the cur:

rent in the. motor in proportion to the acceleration of the motor.

60. In an elevator, a hoisting mechanism, a motor, a source of alternating cur rent supply, a controllin device for the motor, a transformer for t e motor and an independent transformer for the controlling device, said independent transformer havingd a secondary which is entirely metallic an disconnected from the motor ctransformer.

61. In an elevator, a hoisting mechanism, a motor, a source of alternatin current single-phase supply, a controlling vice for the motor, a transformer for the motor and an independent transformer for the controlling device, said independent transformer having a'secondary which is entirelymetallie and disconnected from the motor transformer.

62. In an elevator, a hoisting mechanism, a car, a motor, a source of alternating current single-phase supply, a controlling device for the motor, a transformer for the motor, and an independent transformer for the controlling device, said inde endent transformer having a secondary w ich is entirely metallic and disconnected from the motor transformer.

63. In an elevator, a hoisting mechanism, a single-phase alternating current motor, a transformer arranged to supply current to the motor, a single-phase controlling device, an independent transformer arranged to supply current to the controlling device, said independent transformer having a sec ondary which is entirely metallic and disconnected from the motor transformer, and a source of single-phase alternating current supply.

64. In an elevator, a hoisting mechanism,

an alternating current motor, circuits 'for said motor, a source of current supply for said motor and said circuits, transforming means in said circuits for obtaining suitable voltage for the motor and motor circuits, a controlling device for said motor, circuits for said controllin device, a source of current supply for said controlling device circuits and means for obtaining suitable voltage for the eontrolling'device and controlling device circuits inde endent and different 1n value from the v0 tage in the motor and motor circuits, said controlling device circuits bein entirely metallic and disconnected from t motor circuits.

65. In an elevator, a hoisting mechanism, a single-phase alternating currentmotor, a single-phase brake, a transformer arranged to supply current to the motor and the motor, a transformer arranged to supply.

current to the motor, controlling circuits for the motor, an independent transformer arranged to. supply current for the controllin circuits, said controlling circuits being entirely metallic and disconnected from the motor circuits, and a manually operated switch in said controlling circuits.

67 In an elevator, a hoisting mechanism, a car, an alternating current motor, a transformer arran ed to supply current to the motor, contro-ling circuits for the motor, an independent transformer arran ed to supply current for the controlling circuits, sai controlling circuits being entirely metallic and disconnected irom the motor circuits, and a manually o erated switch in the car and in said control ing circuits- 68. In an elevator, a hoisting mechanism, a single-phase alternating current motor, a sin e-phase brake therefor, a regulating trans ormer arranged tosupply current to the motor and the brake, a switch for said regulatin transformer, a single-phase controlling rivioe, an independent transformer arranged to supply current to the controlling evice circuits, 9. switch for said independent transformer, and a manually opera-ted switch in the car arranged to control the controllin device.

69. In an e evator, a hoisting mechanism, a car, a singlebase alternating current motor, circuits or the motor, a brake, a winding for the brake, a single-phase circuit for the brake winding an electrically actuated reversing switch having contacts which control the motor circuits and the brake circuit, a manually operatedswitch in the car arranged to control the reversin switch, a regulating transformer arrange to supply current in the motor circuits and the brake circuit, and an independent transformer arranged to supply current for the circuits of the reversing switch, said independent transformer having a secondary which is entirely metallic and independent fromtheiregulating transformer.

70. In an elevator, a hoisting mechanism, a source of alternating current supply, a brake, an actuator for said brake, said actuator comprisingan armature pivoted in I the field of the winding and rotatable there by to a position of magnetic equilibrium, connections between the motor and the brake, and means for reducing the load of the brake on the armature as the armature is rotated.

71. In an elevator, a hoisting apparatus, a

motor, a magnetic actuator and winding therefor, a source of sin le-phase supply, means for connecting and isconnecting said winding to and from said source of supply, an armature arranged to be moved into a state of magnetic equilibrium by the actuator, a brake, a controlling spring therefor, intermediate mechanism connecting the brake to the armature, said mechanism arranged to gradually diminish the load of the brake-controlling spring upon the armature in proportion to the movement of the armature.

72. In a motor controller, a reversing switch, a pair of alternating current actuators therefor, armatures for said actuators,

, means for opposing the pull of the actuators on their respective armatures, intermediate means between the reversing switch and the armatures, said intermediate means being arranged to reduce the effect of the 0pposing means during the movement of the armaa tures.

73. In a motor controller, I a reversing switch, a pair of alternating current actuators therefor, armatures for said actuators, means for opposing the pull of the actuators on their respective armatures, intermediate means between the reversing switch and the armatures, said intermediate means being arranged to reduce the effect of the opposing means during the movement of the armatures, said armatures being arranged to be brought into a state of magnetic equilibriumbetween the pull of the actuators and the opposing means.

In testimony whereof I have signed my name to this specification in the presence of two subscribing witnesses.

DAVID LARSON.

Witnesses:

ALFRED C. BECHET, ERNEST W. MARSHALL.