US404893A

US404893A - Elevating-machine

Info

Publication number: US404893A
Authority: US
Publication date: 1889-06-11
Anticipated expiration: 1906-06-11

Description

(No Model.) I 2 Sheets-Sheet I. J. E. BYRNE.

ELEVATING MAGHINE. No. 404,893. Patented June 11, 1889.

(No Model.) 2 SheetsS heet 2.

J. E. BYRNE.

' BLEVATING MACHINE.

No. 404,893. Patented June 11, 1889.

UNITED STATES PATENT OEEIcE.

JAMES EDVIN BYRNE, OF BROOKLYN, NEXV YORK.

ELEVATlNG-MACHINE.

SPECIFICATION forming part of Letters Patent No. 404,893, dated June 11, 1889.

Application filed August 10, 1888. Serial No. 282-477. (No model.)

To all whom, it may concern.-

Be it known that I, J AMES EDWIN BYRNE, a'citizen of the United States, and a resident of Brooklyn, in the county of Kings and State of New York, have invented certain new and useful Electric Elevating-Machines, of which the following is a specification. Y

My invention relates to improvements in elevating machinery in which a rotating drum operates in connection with cables, which, being attached to a suitable car, gives it upward or downward motion, automatic top and bottom and intermediate safety-stops operating in conjunction therewith; and the objects of my improvement are, first, to substitute electric motive power for those now in use; second, to substitute in place of the present safety mechanical arrangements on the machine for automatically reversing the motion of the elevator-car at the top or bottom of the hoistway, or at an intermediate point if the car should meet an obstructionin its descent, thereby causing the car to stop in the hoistway and the hoisting-cables to unwind from the drum, and commonly known, respectively, as automatic top and bottom stops and automatic intermediate step, automatic stops that operate in connection with electric circuits; third, to provide a form of machine that can be operated in a simple manner by means of electric circuits and a switch in the car; fourth, to substitute for the mechanical arrangement for operating the brake an electrical device which is operated from the switch in the car; fifth, to provide a means of automatically reversing the position of the switch at the top and bottom of the hoistway, thereby reversing the motion of the car and preventing accident, thus forming additional top and bottom automatic stops; and, sixth, to substitute for the present elevator-m achines with winding-drums one more simple and efficient and especially adapted for passenger-service. I attain these objects by mechanism illustrated in the accompanying drawings, in which- Figure 1 is a side elevation of the machine with hoisting-cables wound on and leading up from. winding-chum. Fig. 2 is an end elevation of the machine with hoisting-cables wound on and leading up from wimling-drum.

, winding-drum in connection with a side elevation of the top of the elevator-shaft with part-s broken away, and the elevator-car with parts broken away, showing the switch in connection with automatic mechanism for reversing it. This figure also shows a diagram of the electric-circuit connections between the carswitch, the automatics, and the electric motors, together with their make and break contacts. Fig. 4 is a side elevation of the bottom of the elevator-shaft with parts broken away, showing the car with parts broken away, and the switch in connection with antomatic mechanism for reversing it. Fig. 5 is an enlarged view, in side elevation, of the brake and mechanism with electric motor for operating the same, the rest of the machine being broken away. Fig. 0 is an enlarged view, in plan, of the brake and mechanism, with electric motor for operating the same, the rest of the machine being broken away. Fig. 7 is a side elevation of the intermediate stop mechanism and the winding-drum and machine-base, the two latter being with parts broken away.

Similar figures and letters refer to similar parts throughout the several views.

The base 10 and the

standards

20,21, 4.), and 50 form the bed of the machine. The electric hoisting-motor 1 and the backingmgto jj being secured to the worm-shaft 2, give motion in either direction directly to the worm-shaft 2, which has fastened on itthe worm 3, meshing into the worm-wheel 4, which is fastened to the drum-shaft 5, with bearings 25 and 26, in standards 20 and 21., which drumshaft has fastened to it the hoisting-drum 6 and causes the hoisting-drum 6 to revolve, thereby winding the hoisting-cables 7 and hoisting the elevator car 8. The electric brakemotor 9, giving motion directly to the brake-worm shaft 10, which has fastened on it the brake-worm 11, meshing into the swinging worm-segment 12, which is pivoted at point 13, and has attached to it at points 14 and 15 the brake-strap 16, causes the brakestrap 10 to grip the brake-wheel 17, whereupon the brake-wheel 17, being attached to the hoisting-worm shaft 2, stops the motion of the said hoisting-worm shatt when the electric hoisting-motorl is not in operation. The spring 18, being attaehei'l to the machine-base l!) and to the swinging worm-segment 1?, draws back the segment 12 when the brakemotor 0 is notin operation, thereby slaekenin the brake-strap ll 6. To the standard is attached the ribbedbracket 22, through the perforated arms 23 and. 2t of which passes the drum-shaft 2 to its bearing 25. On the portion of the drum-shaft 2 included between the arms 23 and 24: cut a screw-thread 30, and along which travels a nut 27, carrying insulated arms 28 and. 29, the travelingnut 27 being prevented lrom turning by means of a feathor '31 on the bracket 22 which slides through aslot 32,1et into the nut 27. ()n the bracketarms 23 and 24 are located the machine top and bottom automatic stop contact-points S3, 35, 55, and 56, so arranged and at such a distance apart that spring contact-point 33 will be struck by the insulated arm 28, and thereby, in a manner to be hereinafter explained, cause the elevator-car to be automatically reversed only after the elevator-car has passed its upper landing, and thus preyent its wrecking itself in the top of the hoist-way, it from any cause it should not be controlled in the usual manner by the car-operator, and contact-point will be struck by the insulated arm 29, and thereby, in a manner to be hereinafter explained, alter the direction of motion. of the elevator-car, and thus prevent its wrecking itself in the bottom of the hoistway, it from any cause the operator should fail to stop it.

On the machine-base 1.) are located the intermediate automatic stop contact-points 37 and $34, so arranged as to be struck by the end of the lever 39, which lever 39 is iulerumed at point it) and has arms 4'1 and 42 extending" along the bottom of the drum (,5, and thereby, in a manner to be hereinafter explained, cause the elevator-car to be reversed, and therel'iy prevent accident when from any cause the down ward progress of the elevator-car is impcded by an obstruction while the machine is' in motion, thereby cruising the cables 7 to unwind from the drum, the weight oi which, talling on the arms ll and -t-2,causes the lever Ill) to operate.

The operation of the machine is as Follows: The battery-wire c is connected with the switch it; in the car, the hoistirig-machine motor l, wire (ois connected with the contact-point 4-4: in the car, the lowering-machinc motor 57, wire (I, is connected with the contact-point 54- in the car, and the ln'ake-motor 9, wire I), is connected with the car contact-point 415. Eleclectrical contact being made in the car between wires 0 and (L by means of the switch it} and contact-poinut-4t, the motor 1 is started and the machine is set in operation. to hoist the car 3. ("on'iaet now being broken betwecii wires u and (by means of s witch 4-3 and made between wires t) and c by means ol' switch t2}, the motor is tirst stopped, and then thebrakemotor tl being set in operation the brake acts instantly to overcome any existing inertia of the machine aml ear. Contact now being broken between wires 7) and w by means of switch 43 and then made by means of switch 443 between wires c and d, the brake is first slackened by action of spring 18, and then motor 57 starts, reversing the motion of the worm-shaft; and. lowering the car 9. \Vcllknown forms of motors, with suitable tangential brushes that will admit of this reversal of the direction of motion 01'' worm-shat't 2, are to be used.

For the purpose of slunving the operation of the automatics, we will now suppose the car at the top landing and the brake on and breaking contact at contact-point to by means of the switch 43, thus throwing oil the brake, and, making contact between switehwl i and contact-point 5 t, cause the ear to descend until an obstruction is accidentally met with in the hoistway, thus preventing the car from descending any farther and causing the ropes to unwind from the drum (5. The ropes, now falling by their own weighton the lever-arms t1 and i2, cause the lever 31) to operate and break contact in circuit (Z at: ct'intaet-l'ioint 3i and instantly make contact at contactpoint 37 between wires 0 and (t through a portion of the wire (1, thereby causing the machinemotor 1 to start, and thus prevent the ropes from unwinding farther, and at thesame time by the agitation of the car attract the car-operators attention to the state of at't'airs. The

obstruction being new removed, the car tit",

scends to the lower lai'iding, where the operator neglects to stop it and the car attempts to go farther. As the car travels on a short distance farther, the insulated arm 21') comes in contact: with the contactpoint breaking the circuit (I and making connection between the wires (0 and. (3 through a portion ot the wire d and starting the machinc-motor l. The car-o] )erator now making connection between wires or and c, by means ot' the car switch it) and the cinitact-point -l-|-, the car is started upward until, on reaching the top landing, the operatorneglects to stop it. The insulated arm 28 on the machine, as the car attempts to ascend l'arthcr,breaks the circuit (1/ at the spring-contact points 3323 and instantly makes contact between the wires 1' and (I through a portion of the wire (I, and the jmotor 57 starts, causing the car to descend until the arm 2% moves away l'rom the spring contact-points $33, and thus allows the cireuitu to be again closed, the vibration of the car caused by the alternate making and breaking of the circuit calling the attention of the operator.

As an additional set of autonnitic top and bottom stops, the switch i3 is t'nlcrumed at point i8 and extends through the side ot. the car, so as to come in contact with the projection 't-ti,attz'whcd to one of the sides ot. the top of the hoistway, and when. the ear attempts to ascend beyond the upper landing to shift it and cause the contact between the wires c and a at contact-point H to be lrrokcn and contact to be made between wires r and (I at contact-point 5%, thus reversing the motion of the car. In the same manner, when the ear attempts to go below the bottom landing the switch-arm strikes the projection 47, which causes the switch to break contact between wires 0 and (1 at contact-point 54 and make contact between wires to and c at contact-point 44c, and thus reverse the motion of the car.

I am aware that prior to my invention winding-drums driven by worm and gear band and brakes, electric motors with beltconnections, and mechanically operated top and bottom automatic stops have been made and applied in connection with elevator-machinery, and that electric motors have been used for driving-pumps for hydraulicelevators. I therefore do not claim either of these specifically.

W'hat I do claim as my invention, and desire to secure by Letters Patent, is-

1. The combination, in an elevating-machine, of a winding-drum and two electric motors, (one for hoisting and the other for lowering,) connected througha train of mechanism, consisting of a worm-shaft, a worm, a worm-wheel, and a drum-shaft, all substantially as set forth.

2. 'Ihe combination, in an elevating-machine, of a win ding-drum and two electric motors, (one for hoisting and the other for lowering,) connected through a train of mech;

anism, consisting of a worm-shaft, a worm, a

worm-wheel, and a drum-shaft, the motors being in electrical connection with contactpoints in the elevator-car,-all substantially as set forth.

3. The combination, in an elevating machine, of a band-brake having a slackeningspring and an electric motor, the band brake and the motor being mech anically connected through a worm-shaft, a worm, a worm-wheel segment swinging about its shaft and fastened to the brake-baud at two points, the slackening-spring being attached to segment at some point below its shaft and at some point without said segment, the motor being in electrical connection with a contact-point in the elevator-car, all substantially as set forth.

4:. In an elevating-machine, the combination of a bracket having arms carrying electrical contact points, the said electrical contactpoints carried by the bracketrarms, a feather which prevents a traveling nutturning, a traveling nut carrying insulated arms which engage with the electrical contact-points carried by said bracket-arm ,hoi sting and lowering in otors, contact-points in elevator-car, and abattory, the electrical contact-points carried by said bracket-arms being in the electrical circuit connecting the elevating-machine hoisting and lowering motors, the contact-points in elevator-car, and the-battery, all substantially as set forth.

5. In an elevating-machine, the combination of a rocking lever ha'ving arms at one end upon which the hoisting-ropes fall whexrthey unwind from the winding-drum, and at the other end an arm with an insulated tip,hoisting and lowering motors, contact-points with which the insulated tip on the end of the said rocking lever engages, contact-points in the elevator-car, and a battery, the contact-points with which the insulated tip on the end of the said rocking lever engages being in the electrical circuit connecting the hoisting and lowering motors, contact-points on the bracket-arms,contact-points in the elevator-car, and

battery, all substantially as set forth.

(3. The combination of two electric motors fastened to the same shaft, one for hoisting and the other for lowering, and a drum winding the hoisting-cables of an elevator-car connected through a train of mechanism, the motors being in electrical connection with a contact-point in the elevator-car,a brake operated by an auxiliary electric motor connected through a train of mechanism, the auxiliary motor being in electrical connection with a contact-point in the elevator-car, a nut traveling on the windingdrum shaft and carrying insulated arms which engage at the ends of the travel of the nut with contact points mounted 011 the arms of a bracket which carries a feather for preventing the said nut from turning, said contact-points being in the electric circuit connecting the machine-motors with the contact-points in the car, a rocking lever which makes and breaks contact between the battery-wire and the machine-motor wires, and a switch connected with thebattery-wiie and extending through the side of the elevator-car and engaging with stops at the top and bottom of the ele ator-hoistway, thereby altering the position of the switch in the car, all substantially as set forth.

Signed at lirooklyinin the countyef Kings and State of New York, this 6th day of August, A. D. 1888.

JAMES ED'WIN BYRNE.

Witnesses:

ROCKWELL J. HUNTER, CEPHAS LAcEv.

.TIO