US1064205A - Motor-accelerating device. - Google Patents

Description

E. L. GALE, SR. MOTOR AGOELBRATING DEVICE.

APILIOATIOR FILED NOV. 9. 1909.

Patented June 10, 1913.

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iii/(2 2U MJWAA E. L. GALE, SB- MOTOR AGCELEBATING DEVICE.

APPLIOATION FILED NOV. 9, 1909.

1,064,205,v Patented June 10,1913.

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v UNITED STATES rngnn'r OFFICE. i

ERNEST L. GALE, SB", 01? YONKERS, NEW YORK, ASSIGNOR TO OTIS ELEVATOR COM- PANY, OF JERSEY CITY, NEW JERSEY, A CORPORATION OF NEW JERSEY.

MOTOB-ACCELERATING DEVICE.

Specification of Letters Patent.

Patented June 10, 1913.

Application filed November 9, 1909. Serial No. 527,096.

To all whom it may concern:

Be it known that I, Ennns'r L. GALE, Six,

a citizen of the United States, residing at Yonkers, in the county of Westchester and its objects the provision of practical, posiof the motor is desired.

tive and efiicient means for controlling the acceleration of alternating current motors used for operating elevators or for other purposes, and also for accelerating direct current motors.

Generally speaking my invention consists of the combination of mechanical with electrical means for effecting the acceleration of alternating current motors.

Other objects of the invention and the various features of no-veltywill appear hereinafter.

The combinations of elements which are considered as new are set forth in the appended claims.

In the accorroanying drawings, Figures 1 and 2 illustrate the combined elements used in my invention; Fig. 3 is a wiring diagram of electrical circuits for a typical alternating current push-button elevator system, to gether with my invention. Although thearrangements of circuits herein illustrated are based on an arrangement of an alternating current push-button elevator system of con trol, my invention could be readily applied to any system where automatic acceleration Referring to Fig. 2, a sprocket wheel 10 is keyed or otherwise securely fastened on the shaft 1 and the latter is driven by means of the sprocket chain 11 (Fig. 3) and sprocket wheel 13 which is keyed on the winding drum shaft 12. Substantially mounted on the face of the drum 2 are the contacts a, b,

0,-a, b and c. Integral withv the drum 2 is a casing 2-0 which forms suitable supports for the spring 14 and pawl 5.

The stationary contacts A, B and C en gage with the contacts a, b and c, or a, b

and 0, depending on the direction of rotation of'the drum 2. The leads 17 18 and 19 make connections from the stationary contacts C, B and. A, to. the accelerating magnet windings. A weight 44-for centering the drum 2 is secured to the latter by the Y bracket 43.

In the casing 20, which 18 shown in sect on in Fig. 1, the pawl 5 is guided in the, slot 15 and is forced downwardly by the spring .60 14. The driving gear 3 is keyed or otherwise securely fastened to the shaft 1, and engaged by the pawl 5 to rotate the drum 2. Y

A release disk 4 is free to rotate on the shaft 1 and is heldin position by the pivthe pawl 5 out of engagement with the driv- 435 otecl bracket 6 and level- 7, and serves to hold ing gear 3. A projection 24 on the disk 4 fits tightly into the slot 25 and keeps the disk 4 from rotating. The cam surfaces 37 and 37 on the disk4 serve as positive knockouts for the pawl 5, and oblong slot 21 in the disk 4 allows the latter'to lower when the lever 7 is released by the weightedcore 1 i 29 of the automatic switch-G being lifted,

thereby causing the spring-pressed pawl 5 to engage with the driving gear 3 to rotate the drum 2. i

A primary mover rocking lever 7 is pivoted at 28 to the. bracket 8 and a slot 26 is provided in said lever through which the core rod 27 is adapted to pass. -A weight 28 secured to the lever 7 serves to insure the lowering of the left-hand arm of the lever 7 when the weighted core 29 of the automatic switch G is lifted, said weighted core'29 resting on the knob 83 of the lever 7. A

cushion stop 30 for the lever 7, preferably made of rubber or some resilient materiahis substantially supported on the core rod 27.

The position of the cushion stop 30'1nay be ad]usted by means of a nut 31' threaded on the'rod 27, a lock nut 31 also being provided. Secured to the bottomof the autoinatic switch core 29 is a weight 32 which rests on the knob of the lever 7. It is seen that when the automatic switch G The final accelerating magnet H is provided with the contacts 34 and 35 which are adapted to.- complete a holding circuit for magnet H, when contact 34 is moved upwardly by the core 36 to engage the contact 35.

The function and operation of the various even if the gear 0 parts shown in Figs. 1 and 2 will now be described.

Referring to Fig. 1, the final accelerating magnet H and the automatic switch G are shown open, this being their normal posltion when the motor is ready to be started. The primary mover lever 7 is acted upon by the weighted core 29 of the automatic switch G at the knob 33, and holds the disk 4 in its upward position with the bottom of its slot 21 in contact with the shaft 1, likewise holding the pawl 511p and out of engagement with the driving gear 3, so that 3 which is keyed to the shaft 1, is rotated, the drum 2 will not rotate. When the automatic switch winding 77 is energized the weighted core 29 is drawn upwardly, thereby releasing the lever 7 and allowing it to rock with the aid of the weight 28. \Vhen this weight 28 rocks the lever 7, it lowers the disk 4 so that the top of the slotQl is against the shaft 1, thereby allowing the spring pressed pawl 5 to engage with the driving gear 3. A POSI- tive connection is now made for the drum 2, from the driven shaft 1, gear 3, pawl 5 and drum 2, and said drum is ready to be rotated when motor starts. We will say the shaft 1 is rotated in a clockwise direction, looking at Fig. 2 in the direction of the arrows 3838. As the drum 2 rotates, con tacts c and C will engage first thereby making a circuit for the winding 39 of the first resistance cutout magnet. As the drum rotates further the contacts b and B will be brought together just before the contacts 0 and C are separated, thereby making the circuit for the second resistance cut out winding 40 and then dropping the first magnet E. On further rotation of the drum, contacts a and A engage, and contacts I) and-B will separate, thereby breaking the circuit for the second magnet F and making a circuit for the winding 41, which in this case is the last resistance cutout magnet H. When the circuit for the last accelerating magnet H is closed, the contact 34 is operated by the core 36 to engage with contact 35, to make a self-holding circuit forthe magnet H The last accelerating magnet His made self-holding so that when the pawl 5 is knocked out of engagement with the gear 3, thereby allowing the drum to center itself by means of the weight 44, the circuit for the winding 41 will still be made when the cont-acts a. and A are disengaged. When the drum 2 has rotated far enough to make the circuit for the final accelerating magnet H, the resistance now being all cut out, it is evident that the drum should be reset to be in a position to operate when the motor is again started. The resetting oporation is accomplished in the following manner :-VVhen the drum 2 has rotated into position to bring the contacts a and A together, and close the circuit for the magnet ll, the latter lifts its core, carrying with it the lever 7 and the disk 4. The disk 4 lifts the pawl 5 out of engagement with the gear 3 and permits the drum to center itself by means of the centering weight '44. During this movement of the drum, the pawl 5 slides on the disk 4 and is thereby prevented from rccngaging the gear 3, the disk 4 being held up during such movement by the magnet II. It will be understood that the holding circuit through the contacts 34, 35, maintains the magnet H energized at this time. The cam 37 may partially retract the pawl 5 before the magnetH is excited. The cam may of course be so formed that it will not be brought into position to operate until after the circuit for the magnet H has been closed, or said cam may commence to lift the clutch member 5 earlier inthe rotation of the drum. The dropping of the automatic switch G also acts as a knockout for the pawl, in case of the elevator car not having traveled far enough to effectthe operation of the last. accelerating magnet. \Vhen the automatic switch G drops the weighted core 29 strikes on the knob 33 of the lever 7, thereby causing the disk 4 to knock the pawl 5 out of engagement with the driving gear 3, and allowing the drum 2 to center itself, in position to be operated again ,when the motor is operated. It is to be noted tliht under certain circumstances I have three different means for effecting the release of the pawl 5, but in case of the complete operation of the drum to effect the operation of all the accelerating magnets, I claim the disk 4 as my positive knockout.

Referring now to Fig. 3, I show my invention applied to an alternating current push button elevator system. It will not e necessary to go into details of the operation of'the various parts shown in the push button system, as it only repeats well known features which are used in a typical alternating current push button system. I will first designate the parts shown in Fig. 3 which have not been described in Figs. 1 and 2. The motor M receives current from the means, through the main line switch S, the reversin switch J or K, and the automatic switch The acceleratingmagnets E, F and H are provided with suitable connections from the contact drum 2 and are adapted to short circuit'portions of the starting comprises: hall push buttons d, d, d, car push buttons 0, e, e, car safety switch m, gate contact a, up floor controllers f, down floor controllers 9, door contacts k, h, h, floor magnets 70, 7c, is, non-interference magnets 45 and 46. The elevator car C may be driven by any suitable means, but in tlns instance I have shown a typical worm geared elevator installation. A

resistance R. The elevator control system the ordinary manner. A support 48 is provided for the slate board 47 upon which are .mounted various magnets and switches dia grammatically shown, and for the shaft 1 upon whlch various parts shown 1n Figs. 1

and 2 are mounted. An electromagnetic brake B is connected to the main leads of the motor M. A sprocket wheel 13 on the drum shaft 12 drives the sprocket wheel 10 by means of the chain 11. The limit switchesl and Z are located at'the upper and lower limit of travel of the elevator car C. r

The operation of the apparatus shown in Fig. 3 is as follows :The system shown is arranged for three floors, but an installation for any number of floors is. similarly arranged. As shown in Fig. 3 the car is at the second floor landing and the floor controller contacts f and 9 will be in position as shown when the car is at said landing. Now if it is desired to go to the next floor above, the push button 0 in the car is pressed. This makes a circuit for the floor controller magnet is, which circuit may be traced as follows,from the main wire 84, through conductors 49, 51, door contacts h, h, It, wire 43, gate contact n, car safety switch m, wire 54, back contacts 56, 57, Wire 58, back contacts 60, 59, wire 61, back contact 62 of the non-interference magnet 45, wire 63, magnet traced also includes the relay magnet 46 and coil 64 'of the relay magnet 46, wire 65, car push button 6, wire 66, floor magnet la", Wire 67, contact 68, wire 69, contact 70, wire 71, floor controller switches 72, 73 and wire 74 to junction 75. This circuit being through the floor magnet 70, the latter is operated to brin the contacts 81 and 80 together and estab ish a circuit through a reversing switch magnet as will presently be pointed out. The push button circuit just the latter is operated to establish a circuit as follows: from the mains 84, through wires 49, 51, door contacts h, h, h, Wire 53, to junction 53, from thence through wire 52, noninterference magnet 45, contacts 68, 68, wire 69, contact 70, wire 71, floor controller switches 72, 73 and Wire 74. This circuit includes the non-interference magnet 45, which operates to separate the back contacts 62, and to engage the contacts 71, thus establishing a self-holding circuit for the non-interference magnet 45, that is, the circuit from the junction 53 through the magnet 45 and contacts 70, 70, independ- The non-interference magnet 45 having separated the contacts 62, there can be no interference from the opera tion of the landing push button switches d, d, d, as the circuit for these switches is open at the contacts 62.

The operation of the floor magnet in establishes a circuit for the magnet of the brings reversing switch J as follows: from the main 84, through wires 49, 51, door contacts h", it, h, wire 53', contact a, car safety switch m, wire 54, to junction 54, from thence through winding 76 to the reversing switch J, wire 76, back contacts 60 on reversing switch K, wire 61, floor controller switch 73, wire 80, contacts 80, 81, floor magnet in, wires 67, 69, 71, switches 72, 73, wire 74, to junction. 75. The portion of this circuit between the junction 54 and the contact 81 is in parallel with a like portion of the pushbutton circuit iuchiding the back contacts 56, 57 and 59, 60, of the reversing switches, the magnet 64 and the pushbutton switch 0. The reversing switch magnet 7 6 is therefore in parallel with the magnet 64 until the latter is deenergized either, by releasing the pushbutton or by the opening of the back con tacts 5G, 57 on the reversing switch. The circuit through the reversing switch magnet 76 forms a holding circuit for the magnet 7c. The magnet 76 being energized, the reversing switch J closes'and establishes a circuit for the potential switch G. The circuit for the winding 77 is from the main wire 82, through the winding 77, Wire 83, limit switches Z and l, and wire 74 to the main wire 84. The main switch S, reversing switch J and potential switch G now beingclosed, complete a circuit to the stator of the motor M and to the brake B, and the motor starts to rotate at slow speed, all of the starting resistance R being in circuit with the rotor of the motor. The automatic switch G operating to close its contacts, allows the weight 28 to lower the adjacent end of the lever 7, thereby lowering the disk 4 and releasing the pawl 5 to engage with the gear 3, thus making a positive connection for the drum 2- to be rotated when the motor starts. We will say that when the car is going up the druin 2 will rotate in such a direction as to cause'the contact 0 on the drum to engage with the stationary contact C, thereby completing a circuit for the winding 39, from wire 84, through wire 16, contacts c and (J, Wire 17, winding 39, wire 42,

to motor lead 86. The coil 39 being energized causes the contact disk 85 to engage with the contacts 79, 79 and 79, thereby short circuiting a portion of the starting resistance and increasing the speed of the motor. As the drum 2 continues to rotate it the contacts 7) and B into engagement and completes a circuit for'the winding 40 from wire 84, through wire 16, contacts Z) and B wire 18, winding 40, wire 42 to motor lead 86, thereby short circuiting an additional portion of the starting resistance R and causing the motor to further increase its speed. Upon further rotation of the drum it engages contacts a and A, making a circuit for the winding 41, from wire 84, through wire 16, contacts a and A wire 19-,

winding 41, wire 42 to motor lead 86, thereby operating the last accelerating magnet H to short circuit thelast step of the resistance R and allowing the motor to run at full normal speed. The drum 2, after being rotated far enough to efi'ect the operation ot all the resistance cut-outs is released, either by the operation of the last accelerating switch 11 or by the cooperation there with of the cam surface 37 or 37 of the disk 4 which ridesthe pawl 5 out of engagement with the gear 3 as hereinbefore, thereby allowing the drum 2 to center itself on the shaft 1 ready to be operated when the motor is again started. It is to be noted that when the weight 44 causes the drum to center itself, the contacts a and A are disengaged, thereby breaking the circuit for the last accelerating magnet winding 41. But the magnet H is provided with the contacts 34 and 35 which make a holding circuit for the winding 41, from wire 84, by means of Wires 10, 43, contacts 34, 35, winding 41, wire 42 to motor lead 86.

The magnet Hand the automatic switch G being co-acting parts for the lever 7, it is to be noted that when the magnet H is in its operative position, it acts as a hold-up for the lever 7 and its adjacent parts and when the car has reached the desired floor, the floor contacts f are automatically operated to open the circuit for the reversing switch and floor controller magnets, thereby breaking the circuit for the last accelerating ma gnet H and the winding 77 of the automatic switch G and causing them to open. After the magnet H drops, it no longer acts a hold-up for the lever 7, but the automatic switch G now acts as a hold-up for the lever, by the weighted core 29 of the potential switch resting on the knob 33 of the lever. The reversing and automatic switch contacts now being open,

cuts off the supply of current, and consequently the brake is applied, the motor is stopped, and the parts are ready to be operated when the motor is again started. The above operation is for the upward travel of the car, but the principle and operation of my invention will be the same for the downward travel with the exception that thedrum 2 will be rotated in the opposite direction.

While I have shown and described my invention as embodied in an electric elevator system and in a circuit controlling device, the same may have a w is application, further-- more it is obvious tiat various modifications could readily be made in the application herein shown and described without departing from the spirit and scope of my invention, and for this reason I. desire not to, be

' limited to the precise construction and arrangement of parts as disclosed.

What'Iclam as new and desire to have protected by Letters Patent of the United States is 1. The combination with an electric motor, of accelerating mechanism therefor comprising a cont-act drum, positive driving connections between said drum and the motor, circuits controlled by said drum and controlling the operation of the accelerating mechanism, and means for disconnecting the drum from the motor when the accelerating mechanism has operated to accelerate the motor.

2. The combination of an electric motor, accelerating mechanism comprising a contact carrying device controlling the acceler ating mechanism, positive means for operating said device during the acceleration of the motor, and means for automatically disconnecting said device from the motor.

3. The combination of an electric motor,

sectional starting resistance therefor, a contact device controlling short circuits for the operation of the switches, gearing co1npris-- ing a clutch between the said device an l..-' the motor, and means for automatically opening the clutch after the operation of the said switches.

5. The combination of an electric motor, sectional starting resistance, a rotatable drum, switches operated by the rotation of the drum and controlling the startingresistance, a clutch forming a positive driving connection between the drum and the motor, and means for automatically operating said clutch to disconnect the drum from the motor.

6. In combination, an electric motor, accelerating mechanism comprising a me chanically operated device, gearing comprising a clutch bet-ween the motor and said device, a switch in the maincircuit of the 1notor, and means operated by said switch tor controlling said clutch.

7. In combination, an electric motor, accelerating mechanism comprising a mechanically operated device, gearing comprising a clutch between the motor and said device, a switch in the motor circuit, and an 8. In combination, an electric motor, ac-

celerating mechanism comprising a contact drum, gearing com rising a clutch between the sald drum an the motor,- a potential switch, and a potential switch magnet controlling the operation ofsaid drum.

9. The combination of an electric motor, accelerating mechanism comprising a mechanically operable device, a clutch between said device and the motor, a potential switch and magnet, and means controlled by said magnet to operate said clutch and disconmeet the said device from the motor when the potential switch is denergized.

10. The combination of an electric motor, accelerating mechanism comprising a mechanically operable device, a potential switch and magnet, and means operated by said-magnet to effect an operating conmotion between said device and the motor when the-potential switch magnet is energized.

11. In resistancecut-out mechanism, the combination of a rotatable drum, electrical contacts on the drum, means for rotating the drum, a device for engaging the drum with said rotating means, means for auto inatically disengaging the drum from said rotating means, sectional resistance, fixed electrical contacts and connections, and electro-rcsponsive devices actuated when the driimrotates and connects the contacts with the fixed contacts'and operative thereupon to short circuit portions of the sectional resistance.

12. The combination of an electric motor,

accelerating mechanism comprising a series of electromagnets, a device operable to close circuits for said magnets in succession, driving mechanismcompr smg a clutch between -the .motor and said device, and means operated by the last elcctroiiiagnet in said. 8011652 :to operate the clutch and disconnect said device from the motor.

13. The combination of an electric motor, accelerating mechanism comprising a series of accclerat'ing niagntits, a rotary contact "d'evi(-:e opeiable to successively clos c thc .circuits :for said magnets, a clutch forming a cpositive driving connection between said. de-

positive driving connection between saidcontact device and the motor, and positive means for disconnecting the clutch when said contactvdcvice has been rotated through a predetermined angle.

' 15. Thc combination with an electric motor, of accelerating mechanism comprising aseries of electromagnets, a contact drum controlling the'circuits for said magnets driving connections between said drum amt the motor comprising aclutch, means operated by,-.one of said electromagncts for disconnecting;theclutch, and a mechanical device for pbsitively disconnecting the clutch independently of said electromagnet.

16. The combination with an electric motor, of sectional starting resistance, switches for short-circuting said resistance, electromagnets for operating said switches, a rotary contact drum, contacts associated therewith and operable to close the circuits for the magnet windings of said electromagnets in succession, driving connections between the contact drumand the motor and comprising a switch, and a device operable by the last electromagnet of said series to disconnect the clutch members.'

17. The combination with a drivin shaft, a contact drum loosely mounted thereon, clutch members carriedby said drum and shaft respectively, an electromagnet having a circuit controlled by said drum, and means operated by said electromagnet to diseo1 nect the clutch members.

18. The combination with a shaft, of a' net to disconnect the clutch membersgand a device forming a positive means for disconnecting the clutch members independently of said electromagnet when the said contact device is rotated through a predetermined angle.

19. The combination of a drive shaft, a. contact ,(lllll'll loosely mounted thereon, a clutch wheel secured to the shaft, a clutch member carried by the contact drum and mo able into and out of, engagement with said clutch Wheel, and a stationary member i cooperating with said clutch member to disengage itfrom said clutch wheel.

20. The combination with a drive shaft, of

a ontact drum mounted thereon, a clutch inciubcr secured to the shaft, a clutch membcr carried by the drum, a cam disk, an electlirimlg'nct, and means operated by said electi-ciuagnet to move said cam disk mto position to disengage the clutch members, saidcam disk being formed to disengage the clutch members independently of the electroiuagnet when the contact drum has reached a predetermined position.

21. The combination with an electric motor, of accelerating apparatus comprising a rotatable contact carrying member and ascries of accelerating magnets, a driving connection between the motor and' said contact; carrying member comprising a clutch, means operated by one of said electromagnets to disengage the clutch members, an electromagnetic potent ial switch, means operated by the potential switch magnet to hold the clutch members disengaged while the potential switch is opened, and means independent of said magnets for disengaging the clutch members when the contact drum is rotated in either direction from its normal position.

22. The combination with an electric motor, of sectional starting resistance for the motor, resistance cut-out mechanism comprising a rotatable drum, drum contacts,-

as the electro-magnets are energized, and

means for automatically returning the drum to its initial position.

at). T he. combination with an electric motor, of sectional starting resistance for the motor, resistance cut-out mechanism comprising a rotating shaft, a contact drum free to rotate about the said shaft in either direction, fixed electrical contacts arranged to correspond with the drum contacts, mechanical means for rotating the contact drum in the same direction as the shaft, elcctro-n'iagnets successively energized as the contact drum is rotated, means for short circuiting sections of the starting resistance as the electromagnet are energized, and automatic means for returning the contact drum to its initial position and holding the same stationary during the continued rotation of the said shaft.

24. The combination with an electric motor, of starting resistance for the motor, resistance cut-out mechanism comprising a rotatable shaft, means for positively driving the shaft from the motor, a contact drum rotatably mounted on the shaft, fixed contacts to connectwith the drmn contacts when the drum is rotated, electro-magnets energized when the drum is rotated, and a lever operative to permit the drum to rotate as soon as the motor is started.

25. The combination with an electric motor, of starting resistance for the motor, resistance cut-out mechanism comprising a rotatable shaft, means for positively driving the shaft from the motor, a contact drum rotatably mounted on the shaft, fixed contacts to connect with the drum contacts when the drum is rotated, electro-magnets encrgized when the drum is rotated and operative to alter the starting resistance, and a lever operative to effect the rotation of the drum as soon as the motor is started.

26. The combination with an electric motor, of starting resistance for the motor, resistance cut-out mechanism comprising a rotatable shaft, means for positively driving the shaft from the motor, a contact. drum rotatably mounted on the shaft, fixed contacts to connect with the drum contacts when the drum is rotated, electro-magnets energized when the drum is rotated and operative to alter the starting resistance, and a weighted lever operative to permit the rotation of the drum as soon as the motor is started.

27. The combination with an electric motor, of starting resistance for the motor, re-

sistance cut-out mechanism comprising a 7 rotatable shaft, means for positively driving the shaft from the motor, a contact drum rotatably mounted on the shaft, fixed contacts to connect with the drum contacts when the drum is rotated, electro-magnets energized when the drum is rotated and operativeto alterthe starting resistance, a pivoted .lever, means operated by the lever for holding the drum disconnected from the shaft and electro-responsive devices oper- 30 at-ive to release the pivoted lever and thereby effect the rotation of the drum in accordance with the shaft as soon as the motor is started.

28. The combination with an electric mo- 35 tor, of starting resistance for the motor, resistance cutout mechanism comprising a rotatable shaft, a toothed wheel secured to the shaft, a drum rotatably mounted on the shaft, electrical contacts on the drum, fixed contacts to correspond therewith, electromagnets energized when the drum rotates, and operative to short-circuit portions of the res stance, a pivoted rocking lever, electromagnetic means for operating the said lever,

and mechanism operated by said lever to connect the drum with the shaft and cause the drum to rotate.

29. The combination with an electric motor, of starting resistance for the motor,

resistance cut-out mechanism comprising a rotatable shaft, means for positively driving the shaft, a contact drum rotatably mounted on the shaft, electro-magnets energized when the drum rotates andoperative to short-circuit portions of the resistance, a pivoted rocking lever, means associatedwith the said lever for permitting the drum to be rotated by the toothed wheel, and an ele'ctro-magnet operative to effect the movement of the lever when the motor starts.

30. The combination with an electric motor, of starting resistance for the motor,

resistance cut-out mechanism comprising a rotatable shaft..a toothed wheel secured to the shaft, a drum rotatably mounted on the shaft, electrical contacts on the drum, fixed contacts to correspond therewith, electromaguets energized when the drum rotates and operative to short-circuit portions of the resistance, a pivoted rocking lever, a disk mounted on the rotatable shaftand associated with the rocking lever, meatifdor engaging the toothed wheel to rotateithe' drum, and means for disengaging the riving resistance cut-out mechanism comprising a rotatable shaft, means for positively driving the shaft, a contact drum rotatably mounted on the shaft, elect-ro-magnets energized when the drum rotates and operative to short-circuit portions of the resistance, a pivoted rocking lever, a disk formed with a slotted opening for mounting the disk on .the rotatable shaft, means for engaging the drum with the toothed wheel to rotate the drum, and means in connection with the disk and the rocking lever for disengaging the drum from the toothed wheel.

33. The combination with an electric motor, of starting resistance for the motor, resistance cut-out mechanism comprising a rotatable shaft, means for positively driving the shaft, a contact drum rotatably mounted on the shaft, electro-magnets energized When the drum rotates and operative to short-circuit portions of the resistance, a toothed wheel connected to the shaft, a pivoted rockirig lever, a device in connection with the contact drum operative to engage the toothed wheel to effect the rotation of the drum, and means operable by said lever into and out of position to permit said device to engage the toothed wheel.

34. The combination with an electric motor, of starting resistance therefor,- resistance cut-out mechanism comprising a rotatable shaft, a toothed wheel secured to the shaft, a contact drum rotatably mounted on the shaft, electro-magnets energized in succession as the drum rotates and operative to short-circuit portions of the resistance, a lever, electro-responsive means for permittingthe lever to operate, means for engaging the toothed wheel to rotate the drum, and a disk operated by the lever and effective to perlnit the rotation of the drum when the lever is operated in one direction.

35. The combination with an electric motor, of starting resistance therefor, resistance cut-out mechanism comprising a rotatable shaft, a toothed wheel secured to the shaft, a contact drum rotatably mounted on the shaft, electro-magnets energized in succession as the drum rotates and operative to short-circuit portions of the resistance. a lever, clectroa'esponsive means for permitting the lever to operate, means for engaging the toothed wheel to rotate the drum and a disk operated by the levcrand effective to permit the rotatlon of the drum and,

to prevent the rotation farther than a prcdetermined point. I

36. The combination with an electric motor, of starting resistance therefor, resist ance cut-out mechanism comprising a rotatable shaft, a toothed wheel secured to the shaft, a contact drum rotatably mounted on the shaft, electromagnets energized in suc-' cession as the drum rot-ates and operative to short-circuit portions of the resistance, a. lever, electro-responsive means for permit;

ting the lever to operate, means for engaging the toothed wheel to rotate thedrum, and a diskoperative to permit the engaging means torotate the contact drum, and said disk being provided with cam projections to effect the positive release of said engaging means.

37. The combination with an electric motor, of starting resistance therefor, resist ance cut-out mechanism comprising a rotatable shaft, a toothed wheel secured to the shaft, a contact drum rotatably mounted on the shaft, clectro-magnets energized in succession as the drum rotates and operative to short-circuit portions of the resistance,

a lever, electro-responsive means for permitting the lever to operate, means for engaging the toothed wheel to rotate the drum,

and a. slotted disk vertically nu able and operative to permit the operation of the saidengaging means, said disk being formed with cam surfaces for releasing the said engaging means when the drum has rotated a predetermined amount.

38. The combination with an electric motor, of starting resistance therefor, resistance eut-out mechanism comprising a rotatable shaft, a toothed wheel secured tot-he shaft, a contact drum rotatably mounted on the shaft, electro-magnets energized in succession as the drum rotates and operative to short-circuit. portions of the resistance, a lever (El QCiIO-I'CSPOIlSlYQ means for permitting the, lever to operate, means for enga ing the toothed wheel to rotate the drum, ant a slotted diskoperated by the lever to permit the operation of said engaging means. i

39. The combination with an electric motor, of starting resistance therefor, resistance cut-out mechanism comprising a rotatable shaft, a toothed wheel secured to the shaft, a contact drum rotatably mounted on the shaft, clectro-magnets energized in. succession as the drum rotates and operative to short-circuit portions of the resistance, a

lever, clectro-responsive means for permitting the lever to operate, means for engaging the toothed wheel to rotate the drum, a disk operated by the lever to permit the operation of the drum rotaling1mans and to ell'ect the release thereof when the drum has been rotated. and separate means for effecting the release of the drum rotating means.

40. The combinationWit-h an electric motor, of starting resistance therefor, resistance cut-out mechanism comprising a rotatable shaft, a toothed wheel secured to the shaft, a contact drum rotatably mounted on the shaft, electro-magnets energized in succession as thedrum rotates and operative to sl'iort-circuit portions of the resistance, a lever, electro-responsive means for permitting the lever to operate, means for engaging the toothed. wheel to rotate the drum, a slotted disk-permittihg the operation of the tooth engaging means to rotate the drum when the lever is operateld and preventing rotation of the drum fur her than a given amount, and means for returning the drum to its initial position after the drum has rotated the given amount.

41. The combination with an electric motor, of starting resistance therefor, resistance cut-out mechanism comprising a rotatable shaft, a toothed wheel secured to the shaft, a contact drum rotatably mounted on the shaft, electro-magnets energized in succession as the drum rotates and operative to short-circuit portions of the resistance, a lever, electro-responsive means for permitting the lever to operate, means for engaging the toothed wheel to rotate the drum; a disk operated by the lever to. permit the engaging means to rotate the drum and to release the engaging means when the drum has beenrotated a predetermined amount, and electro-responsive means for effecting the release of the engaging means before the drum has been'rotated the predetermined amount.

42. The combination with an electric motor, of starting resistance therefor, resistance cut-out mechanism comprising a rotatable shaft, a toothed wheel secured to the shaft, a contact drum rotatably mounted on the shaft, electro-magnets energized in succession as the drum rotates and operative to i short-circuit portions of the resistance, a lever, elcctro-responsive means for permitting the lever to operate, means for engaging the cut-out mechanism comprising a rotatable,

sha ft, a toothed wheel secured to the shaft, a contact drum rotatably mounted on the l't. electro-magnets energized in succes Wm as the/drum rotates and operative to --nortseircuit portions of the resistance, a

lever, electro-responsive .means for permitting the lever to operate, means for engaging the toothed Wheel to rotate the drum, a disk operated by the lever to permit the engaging means to rotate the drum and to release the engaging means when the drum has been rotated a predetermined amount, electro-responsive means for effecting the release of the engaging means before the drum has beenrotatcd the predetermined amount, a weight for returning the drum to itsinitial position whenever the engaging means has been released, and means for antoi'natically returning the lever to its unoperated position.

t-ft. The combination with an electric motor, of starting resistance therefor, resistance cut-out mechanism comprising a r0- tatahle shaft, a toothed wheel secured to the shaft, a contact drum rotatably mounted on the shaft, electro-magnets energized in succession as the drum rotates and operative to short-circuit portions of the resistance, a weighted lever, an electro-magnet to release the-lever when it is energized, a pawl for engaging the toothed Wheel to rotate the drum, means operated by the lever to permit the engaging of the pawl and to disengage the same at a predetermined time, and an auxiliary contact for closing a retaining circuit through the last shortcircuiting magnet as long as the electro-magnet which releases the weighted lever is energized.

45. The combination with an electric motor, of starting resistance therefor, re-

sistance cut-out meclianism comprising a rotatable shaft, a toothed wheel secured to the shaft, :1 contact drum rotatably mounted on the shaft, electr'o-magnets energized'in succession as the drum rotates and operative to short-circuit portions of the resistance, a weighted lever, an electro-magnet at one end of the lever to release the lever when the ma gnet is energized,means for engaging the toothed wheel to rotate the drum, a cam shaped disk operated by the lever to permit the operation of the engaging means and to disengage the same at a predetermined time, and means in connection with the last short-circuiting magnet for releasing the said engaging means as soon as the-said magnet is energized.

46. The combination with an electric motor, of starting resistance therefor, resistance rut-out mechanism comprising a retatable shaft, a toothed wheel secured to the shaft. a contact drum rotatably mounted on theshaft, electro-magnets energized in succession as the drum rotates and operative to short-circuit portions of the resistance, a weigh ted lever, an electro-magnct at one end of the lever to release thelever when the magnet is energized,- means for engaging the toothed \vl'icel to rotate the drum, a camshaped disk operated by the lever to permit .short-circuiting ma 'the operation of the engaging means and to disengage the same at a predetermined time, and means in connection'with the last shortcircuiting-magnet for lifting the lever to release the engaging means as soon as the said magnet is energized.

Y 47. The combination with an electric motor, of starting resistance therefor, resistance cut-out mechanism comprising a r'otatableshaft, a toothed wheel secured to the shaft, a contact drum rotatably mounted on the shaft, electro-magnets energized in succession as the drum rotates and operative to shortcircuit portions of the resisttime; a weighted lever, an electro-magnet at one end of the lever to release the lever when the magnet is energized, means for engaging the toothed wheel to rotate the drum, a cam-shaped disk operated by the lever to permit the operation of the engaging means, a rod in connection with the last et operative to raise the lever and release t e said engaging means,

and means for maintaining the circuit for the said last short-circuiting magnet independently of the. position of the drum and there by holding the lever in said raised position I after the said engaging means has been rev leased.

l8. The combination with a motor, of motor accelerating mechanism comprising arotatable contact drum, mechanical con nections between the motor and contact drum for effecting the rotation of the latter, an automatic switch, sectional starting resistance for the motor, accelerating magnets, their windings having one common terminal connection through the switch, and electrical circuits closed and opened through the saidcontact drum connecting the accelerating magnet windings with the main line in regular succession to effect the oper ation of the said magnets to short-circuit portions of the sectional resistance.

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

ERNEST L. GALE, sR.

Witnesses Aenn' W. FLAGG, C. H. AREUT.

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