US851829A - Electrically-controlled elevator. - Google Patents

Description

No. 851,829. PATENTBD APR. so, 1907. 0. & F. 0. NAUJOKS. ELEOTRIOALLY CONTROLLED ELEVATOR.

APPLIOATIQN FILED APR.16,1906.

3 SHEETS-SHEET 2.

I N VEN TORS No. 851,829. PATENTED APR. 30, 1907.

' c. 65 F. 0. NAUJOKS.

ELEOTRIGALLY CONTROLLED ELEVATOR.

ARPLIOATION FILED APR. 16.1906.

3 SHEETS-SHEBT 3.

WITNESSES: 977 r m4 fima/zf z y J7 ATTORNEY.

UNITED STATES PATENT OFFICE.

CARL- NAUJOKS AND FREDERICK O. NAUJOKS, OF SAN FRANCISCO, CALI- FORN IA, ASSIGNORS OF ONE-NINTH TO GEORGE GOEPPERT, ONE NINTH TO BALLO BRUETTING, AND ONE-NINTH TO VICTOR MOOKEL.

ELECTRICALLY CONTROLLED ELEVATOR.

To all whom it may concern:

Be it known that we, CARL 'NAUJOKS and FREDERICK CARL NAUJOKS, subjects of the Emperor of Germany, residing at San Francis co, in the county of San Francisco and State of California, have invented certain new and useful Improvements in Electrically-Controlled Elevators, of which the following is a specification.

This invention relates to improvements in electrically controlled elevators, the object .of the invention being to provide an apparatus by which the elevator can be operated by the passengers themselves, either on the several floors or in the elevator itself, and without the necessity of employing a special operator for that purpose.

Before describing in detail the construction of the apparatus, it may be desirable to explain its general mode of operation. Supposing that the elevator is standing still at any floor of the building then the corresponding door of the elevator will, under those circumstanoes, be open. When a person'on a floor above or below desires to use the elevator, he presses an electric push button arranged on the frame work of the elevator, at the floor where he is standing. This withdraws a latch which holds the door open, and allows the door to close, by a weight or a spring, as may be preferred. When the door closes, it closes a circuit throughthe motor, energizing the motor. The direction of the current permitted to pass through the motor is made to depend upon whether a button above or below the elevator is pressed, so that in the former case the elevator moves up, and in the latter case it moves down.

When it arrives at the floor at which the button was pressed, it breaks the circuit which was closed through the motor, and also actuates a lever which opens the door, this door being then held open by the latch heretofore mentioned. A device then stops the elevator on a level with the floor. The passenger then steps into the elevator and presses a button in the elevator corresponding with the floor to which he desires to go, whether up or down. There will be a number of series of such buttons provided in the elevator,

as, for instance, one series on each of the three sides of the elevator, so as to be within easy reach of anypassenger. The pressure Specification of Letters Patent. Application filed April 16, 1906. Serial No. 311,888.

Patented April 30, 1907.

on this button closes the circuit which withdraws the latch which held the door open, so that the door closes, and, in like manner as before, the closing of the door closing a circuit in the motor, the direction of the current through the motor being determined by the position of the floor corresponding to the button pressed. The elevator then ascends or descends to the desired floor and is arrested in the same manner as before, and the door is automatically opened.

Should a passenger on any floor press a button when the elevator is movin toward him either from above or from beIo'w, this will automatically arrest the elevator and will automatically open l the door. But should he press the button when the elevator is moving away from him, this will have no effect upon its movement; Should there be a number of passengers on the different floors all wishing to enter the elevator, who press buttons on the elevator frame, the elevator, if moving toward said passengers, will stop at each one in succession, and the door will automatically open. In like manner, should there be a number of passengers in the elevator wishing to leave the elevator on dilferent floors and who have pressed the corresponding buttons, the elevator will then stop in succession at the corresponding floors.

In the accompanying drawings, Figure 1 is a diagram of the apparatus; Fig. 2 is a broken rear view of the elevator, showing one of the elevator doors in inside elevation;

, Fig. 6 is a side view of the regulator; Fig. 7 is a section of the grip; Fig. 8 is a broken perspective view of the inner ends of the current divider strips; Fig. 9 is a sectional view of one of said ends; Fig. 10 is a side view of a break at a door; Fig. 11 is a vertical section thereof; Fig. 12 is a diagrammatic view,

showing the modification of the apparatus as applied to a water-actuated elevator.

The electrical partof the apparatus comprises the following circuits :-First, the motor circuit, which must be closed in order to start the motor to move the elevator. This circuit is-provided with means for changing the direction of the current through the armature, so as to change the direction in which the main through a push button carried by the elevator and corresponding to the floor at which it is desired to stop. Third, a safety door circuit, which is a circuit passing in parallel through safety devices of the several doors of the elevator'shaft, and then passing through a check-controlled device closed by the closure of the controller circuit of any floor, so as to insure all 'doors closing before the elevator is started.

{ a- The controller circutt.Leading from a wire 1 (hereinafter known as the third wire) connected with the positive main 2 of the positive and negative mains 2, 3,-is a wire 4 which leads to all the ush buttons 5 of the several floors of the e evator shaft. From the other sideof each push button leads an individual wire. 6 through a magnet 7 and thence by a wire 8 to'one of two current dividing strips 9,10, extending respectively to the bottom and top of the elevator shaft, and there being wound by springs 11 upon drums 12. The other ends of said strips 9, 10, which. are adjacent to each other are carried by the elevator. Theendof the wire 8 is maintained in contact with one or the other of the contact strips 9, 10, by being connected to an individual plate 13 which is secured at tance that the contact any convenient point at the floor corresponding to the push button, and has two spring metal lips 14, which at the middle are almost in contact. with each other, but at the upper and lower edges flare outward from each other, so that either strip when passing between said lips is maintained in close contact therewith by the pressure of the same. The ends of the strips which are adjacent to each other, are each made tapering orwith a fine edge 16 as shown in Fig. 8, said edges be.- ing separated fromeach other to such a displate 13 can he between them without be1ng in contact with either, so that in this position there is no short circuit between the circuitv dividing strips, and the contact plate 13 isnot connected with either stri This is the osition corresponding wit the point at w ich at each floor.

From the end of eac current divider strip is a Wire 17 leading to a contact'point 18 over which swings a direction chan er 19 upon an arm 20 on a shaft 21 said s aft having a forked arm 22, the ends of which are pivoted to a friction grip 23 through which passes a stationary cable 24 extending through the sc esa shaft and secured at top and bottom.- On one side of said gri extends posts 25 the ends of which are threaded and carry nuts 26'which press against a plate 27 by which plate is compressed a spring 28 the other end of which presses against a block 29 and forces said block against said cable 24, thus furnishing a uniform pressure of said grip upon said wire. When the elevator is moving, as, for instance, downward, the gri on account of its frictional contact with t e cable, lags behind, causing the slotted forked arm to extend upward, and the direction changer to swing downward, and thus bringing it into contact with the contact point 18 connected with the lower current divider strip. The direction changer is connected by a wire 30 with the negative main 3. By this means all the electro-magnets of theiioo'rs below the elevator are placed in parallel upon a circuit and leading through the push buttons 5, the current divider strip 9 and the direction changer, while those of the floors above the elevator are on a broken circuit. Consequently to close one of these circuits below the elevator all that is necessary is to press the push button 5, whereupon the electro magnet 7 is energized. However, any electro magnet 7 of a oor below the elevator may also be energized by a circuit having a push button in the elevator itself. For this purpose there is provided a wire 32 leading from the third wire 1 to a bar 33 adapted to contract with any one of a series of push buttons 34 each button 34 leading by a wire 35 to the wire 6. The circuit then continues in the same way as before through the electromagnet 7, contact 8, current divider strip '9 or 10 direction changer 19, wire 30, to the negative main 3. Thus upon pressing any push-button 4 on a floor of the elevator shaft belowthe elevator, or on pushing any push button 34 in the elevator corresponding to a floor below the elevator, the corresponding electro-magnet 7 can be energized. The

effect of energizing this magnet is to withdraw a latch 36, permitting a switch carrier 37 to swing, under the action of a sprin 38. The movement of this switch carrler c oses two circuits, the motor circuit, and the door safety circuit.

The motor circuit-The motor circuit is as followsz-From the positive main 2, by a wire 39, passing in series through breaks 40,

one for each door of the elevator shaft, to the 20 top of said shaft, then returning by a wire'41,

to a contact 42, arm 43 ofthe switch carrier 37, wire 44, to a contact 45 of a circuit changer 46, wire 47, (the parts from 42 to 47 being repeated for each floor ofthe shaft) thence to a common wire 48 leading to a contact 49 on one side of the armature, through the armature 50, then by a contact 5]. to a wire52, connected at each floor of the elevator with a wire 53 leading to a contact 54 of the circuit changer, thence by a wire to an arm 56 carried by the switch carrier, which, by the removal of said latch as aforesaidhas been brought into contact with a contact 58, thence by a wire 59, to a common wire leading to oneend ofthe field magnet coil 61, through said coil, and then from the other end of said coil'to the negative main 3.

The position of the circuit changer, depends upon the location of the elevator relative to the'fioor at which the circuit is thus closed. If the elevator is above said floor the current will be such that when the circuit is closed it will actuate the motor to cause the elevator to descend. if the ele vator is below the floor at which. the circuit is closed, then the current will be such that the motor will be moved in the direction causing the elevator to ascend. This is ac complished by means of a projection 62 extending from the side of the elevator, which,

as the, elevator passes, is adapted to contact I with one or the other of two arms 63. When the elevator passes these arms in descending, this extension strikes the lower of the two arms and shifts the circuit changer from the position shown in the lower portion of Fig. 1

to the position shown in the upper portion of said figure. It will be readily seen that the electrical connections of the two wires 44', 55, with the two contacts 45 and 54 are now interchanged, so that thecurrent proceeds through the armature in the opposite direction to that formerly taken;

The circuit changers are so situated that when the elevator stops at any floor, the projection 62 is midway between said arms 63.

At that time, obviously, all the circuit changers below the elevator are in theposition shown in the lower part of Fig. 1, and all the circuit changers above the elevator are in the.

position shown .in the upper part of said'figure. Consequently if a person in the elevator wishes to descend and energizes a magnet below him, or if a person on a floor below the elevator wishes to bring the elevator down, and presses the corresponding push button, thus energizing the corresponding magnet, the circuit will be closed in such a way as to operate the motor to bring the elevator down, and if a person in the elevator wishes to as cend and energizes amagnet above him, or if a person on a floor above the elevator presses the corresponding push button, the motor will be operated in the opposite direction.

But it has been stated that the circuit cuit can not be closed, and .the motor started,

unless every door in the elevator shaft is closed.

Each break comprises a series, as four, of

contact strips 64:, each conne'cted at sufficiently long intervals with a high resistance wire 65, these strips being secured upon the frame 66 of the shaft, adjacent to the door. Upon the door 67 itself is secured a bracket 68 for acontactarm 69 pivoted at 70 and carrying a spring contact 71. To a point 72 said arm 69 below its pivot is connected the lower end of a stretched spring 7 3, the upper end of which is connected to the top of a post 7 a on said bracket. The effect of said spring is evidently to quickly throw the contact arm to one or the other side of the center. Upon the frame, in the path of the bottom of 4 the arm 69, are provided stops 75, 7 6, and the operation of this part of the device is therefore as follows :Supposing that the door is being opened, by mechanism to be presently described,-the contact arm will then extend from its pivot downward away from the first of the series of contact strips, the contact spring will then pass in succession over the contact strips. Said contact strips and said resistance Wire are connected with the wire'39 leading to the main 2, while the contact arm is connected with the wire 41 leading to the motor. As the contact spring moves over said strips in succession, it evidently throws more and more resistance into the circuit through the motor, causing the' current to diminish and checking the speed of the motor, so that when the door is fully o ened the current through the motor is so s ight that it is ready to stop. When the end of the arm 69 strikes the stop at that end of its path, said stop causes said arm to swing across and when the stretched spring passes the pivot, said spring acts to throw the arm quickly past the center, and thus remove the contact spring 71 from the last contact strip and break the circuit.

It being understood that the circuit through the motor will not be closeduntil all the doors in the elevatorshaft are closed, it remains to be seen how any open door, particularly' the one through which the passenger has just entered, or the one at the floor where the last passenger has left the elevator, is automatically closed upon pressing the push button. It will have been understood that the direction changer which is quickly actuated by two springs on opposite-sides is onl tilted when the elevator is moved. When the elevator stops, said springs tend to move said direction changer into a horizontal position. A regulator 77, the detailed construction of which will be presently described, is provided to regulate the time taken to bring the direction changer to this horizontal position. When it is in the hori zontal position it is in contact with both of the current divider strips,so that when the elevator is at rest, and has been at rest for a sufficient length of time, all of the magnets of liO &

edges 78, 79, extending inwardly toward said path. Said edges, when the switch carrier has been swung inward, are adapted to contact with a projection extending rearwardly from the elevator and to be pressed.

back thereby as the elevator passes, thereby breaking the circuit through the motor, and stopping the motor. But before so doing, the switch carrier presses against one or the other (according as the elevator is ascending or descending) of two contact strips 81 and thus closes a circuit 82 passing in parallel through two pairs of contact points 83, said circuit being derived from the wires 1 and 3, and passing through an electro-magnet 84 secured on the under side of the elevator. This magnet then attracts an armature 85 against the tension of a spring86 thereby with-drawing a latch 87 and releasing a lever 88 actuated by a spring 89, the other end of the lever carrying a fork 90, which fork is thereby moved toward thefront of the elevator shaft, so that one or the other rollers 91 carried on its members is in position to engage the arm 92 of a lever 93, pivoted at 94 and depresses the arm 93 thereby elevating the other end of the lever, which is attached by cords 95 to arms 96 of hell crank levers 97 pivoted at 98, the other ends of the bell crank levers being attached by cords 99 to the edge of the door 67. Thus whether either roller strikes the arm 92, in descending or ascending, the effect will be the same, to slide the door from the front of the elevator.

It is by this motion that the door carrying the contact arm makes successive contacts with the contact strips, and reduces the speed of the elevator before it is finally stopped by the outwardmovement of the switch carrier which breaks the circuit. The end of the lever 88 carries a roller 57 adapted to engage one or the other of two"'cam blocks 100, which return the lever to its original po sition, it then being caught and held by the latch 87 of the armature which has been released from the electro-magnet 84. When the door is withdrawn in the manner thus d escribed, a latch 101 operated by a spring 102 moves in front of the front edge of the door and retains it open. This latch. can be withdrawn by means of an electro-magnet 103 senses close, which it will do by weights 104, or a spring might be provided for this purpose.

Safety door circuit.But provision is made that the circuit through the electro-magnet will not be energized to withdraw the latch until the door has been left open a sufficient length of time to enable a person in the elevator to pass out therefrom. Which is as follows: When the door has been fully opened, a contact strip 105 carried at the lower edge thereof electrically connects two points 106, 107, in a circuit leading from the wire 1 by a common wire 108 then by a wire 109 through the electro magnets 103, then through the contact points 106, 107, to a common wire 110. This common wire is connected by a flexible wire 111 with a safety plate 112 carried upon the arm of the direction changer. When the elevator has just been arrested, the arm of the direction changer is oblique to the horizontal, so that the safety plate is electrically separated from a contact point 113. But when the elevator has been at rest a sufficient time the safety plate is moved so as to make contact with the contact point 113, the circuit then proceeding from said point by a wire 114 to a thence by an individual wire '116-to a contact 117 which is adapted when the switch carrier swings inward to connect with a contact 118 on said switch carrier which contact is connected by an individual wire 119 with a common wire 120 leading to the wire 3. Consequently, even should a push button be pressed to start the motor, it will produce no effect until a sufficient length of time has elapsed since the opening of the door, for the motor circuit passes in series through all the breaks at the doors, so that'if any door is open the circuit is broken. But when the elevator has been at rest a sufficient length of time, the circuit through the magnet 103 controlling the latch 101 holding the door open is closed so far as the safety plate 112 and contact point 113 are concerned. It will still be open at all of the pairs of points 117, 118, on all of the switch carriers, But as soon as any person, by pressing a push button, moves said switch carrier, the door controlling circuit is closed, the'latch is withdrawn, and the door closes. The closing of all open doors, if there are more than one open, closes all the breaks at the doors and closes the circuit through the motor.

The rcgulat0r.1n order to regulate the time elapsing from the stoppage of the door at any floor of. the elevator shaft until it can be started again either by the immediate pressure of a button or because a button had already been pressed before the stoppage of the elevator, there is provided on the shaft 21 of the arm 20 which-carries the current direction changer and the safety plate, a

and the door allowed to swing forward and l ratchet wheel 123, which teeth are adapted wire 115 common to all ofthe shafts, and

ceases to be engaged by pawls 124 pivoted upon the arm, opposite sides of the wheel, and con' trolled by cams 125 suitably supported upon the side of the elevator, said pawls being caused to normally engage said ratchet wheels by springs 126. Geared to said ratchet wheel is a pinion 127 having a crank arm 128 pivotally connected to a rod 129 of a piston 130 sliding in a cylinder 131 the other end of which is pivotally supported, as shown at 132, the ends of said cylinder being connected, past the piston, by a narrow tube 133 the passage. through saidtube being regulated by a valve 134. By screwing said valve in or out the speed at which oil or other suitable fluid can pass from one of the cylinders to the other through said passage can be varied, and thus the speed at which the piston can move in the cylinder can be varied. By this means can also be varied the time taken by the arm 20 to return to a horizontal or central position under the ac tion of the springs. It is only when it has returned to this central position that the elevator can again be started. Stops 135 are provided on each side of said arm 20 to limit the movement thereoi. Thus the operationof this part of the apparatus is as follows Supposing that the elevator is descending, the friction grip 23 will move upward rela tively to the pivot of the arm, until arrested? by the upper stop 135. The pawl carriedthereby will not however engage the ratchet wheel, because its outer end will have 'en-i gaged the cam 125, throwing the nose of the; pawl out of engagement with .the ratchet I wheel, so that the arm 20 can move freely upward. .The other pawl can easily move over the teeth of the ratchet wheel. But as soon as the elevator comes to rest, and the friction grip no longer lags behind, the springs 141 tend to swing said arm into a horizontal position, causing the pawl on the outer end of the arm to engage the ratchet wheel, since theouter end of said pawl is not in engagement with its cam. Said arm can then only return slowly, since it is opposed by the pressure in the cylinder upon the pis tion dueto the slow passageof the oil past the valve.

jl'lotorcar'rent ChOlfT.-II1 this system the circuit through the motor is suddenly closed through the switch carrier, and this sudden closure of the circuit through the motor tends to burn out the coils of the motor, unless a rheostat or its equivalent is provided. To obviate this objection I provide the following contrivance. In one of the-wires leading to the motor, as, for instance, the wire 3, is a break which is closed by two circuits in parallel, of which one circuit 145 leads through a rheostat 146 and another circuit 147 leads through a small motor 148. This latter circult is broken at two contact points 149 and for connecting said points is an arm 150 of a.

switch 151. This switch has a fork 152 between the members of which extends an arm 153 of a lever 154, the other arm of which is connected by a cord 155 with an arm of a pawl 156 the nose of said pawl engaging a ratchet wheel 157, said ratchet Wheel being connected to the shaft of the small motor. The arm 153 of the lever passes successively over contacts of the rheostat, its movement being resisted by a coiled spring 158. Upon the rheostat is a magnet 159 supplied by branch wires 160 from the two wires 145.

When there is no current through the wires leading to the main motor, this magnet is deenergized, and the lever 154 is drawn back by the spring 158 to the out of circuit point of the rheostat. This throws the switch 151 into such position that it closes the circuit 167 through the small motor. 7 The result is that when the circuit is closed through the main motor except for this break a current passes through the small motor and starts it revolving, causing the ratchet wheel to revolve and to carry with it the pawl 156 and its arm 155 attached by the cord to the lever 154 and causing the lever to pass successively over the contact points of the rheostat, cutting out the successive resistances of the rheostat so that a greater portion of the current can pass through the main motor. When said arm has been revolved by the ratchet wheel into such position that all of the resistance of the rheostat has been cut out, an extension 162 of a pawl strikes a stop 163 which throws a pawl out of engagement with the ratchet wheels The spring 158 does not however retract the lever back to its original position on the rheostat, because the magnet '.159 is energized holding said lever in position to give a full current; At that time the arm of the lever has thrown the switch so as to break thecircuit through the small motor.

Water Zif2.-ln Fig. 12 is shown a modification of the invention in which water power may be used to operate the elevator, the control of said power being effected by electricity For this purpose there is provided a supply pipe 170, a discharge pipe 171, and a lifting pipe 172, all controlled by a valve 173, adapted in one terminal position to admit the water from the pipe to the pipe 172 and in. another terminal position to admit the water from the pipe 172 to the pipe 171, and closing all the pipes when in its intermediate position. This valve is moved by means of a pulley 1'74 driven from either of two motors 175, 176. The motor 175 receives its current by the main wire 177, the current then passing by a wire 178 to the several floors of the shaft and then returning by a Wire 17 9 in precisely the same manner as by the wires 60 and 39, in the former modification, said wire 179 being connected to a contact carrier 180 having a contact 181-adapted to be in too @ senses connection with a plate 182 when the elevator is at rest, a wire 183 leading from said plate to the main 184.. Therefore, when the elevator is at rest, and the circuit between the wires, 178 and 179 is closed in precisely the same manner as was the circuit between wires 60, 39 in the former modification, the motor 17 5 is started causing the valve 173 to turn; and connecting the pipe 172 either with the 'ipe 170, or with the pipe 171, this dependingu on the direction in which the motor is revo ved. This direction will be controlled by the circuit changer wires 185, 186 which correspond precisely to the wires 52, 48, in the former modification. Supposing, for the sake of illustration, that the valve is turned to admit the water to raise the elevator, and that the contact carrier swings to the right into the position shown in the figure, then, after the valve has been sufficiently opened, the circuit through the motor 175 is broken, and the elevator continues on its upward motion, by reason of the admission of water into the pipe 172', until the valve is started on its return movement. This is accomplished by means of the second motor 176, which derives its current as follows :from the wire 177 by a wire 188, contact 189, contact plate 190, wire 191, armature of the motor 176, wire 192, contact plate 193, contact 194, Wire 195, field magnet of the motor, wire 196-, through one of av series of individual wires 197, individual contact 198, contact plate 199: on the side of the elevator, switch carrier 200, actuated precisely in the sanie manner as the switch carrier in the first modification, individual wire 201, common wire 202., to the other main wire 184. Therefore when any push button, either on the elevator or at a floor of the shaft, has been pressed to cause the switch carrier to swing inward toward the path of the elevator, then when said elevator arrives at the position corresponding to said push button, the circuit is closed through the stopping motor, 176, and the valve is returned. to its central position, shut ting off the water from the uplift pipe. A precisely similar operation takes place when the elevator is caused to descend by the flow of water from the uplift pipe into the discharge pipe, except that the contacts 189,

194 are now connected with plates 2.03, 204, connected by wires 205., 206, with the wires leading to the armature in such a manner that the direction of the current through the motor is reversed.

ll claim 1. in an elevator, in combination with means for raising and lowering the elevator, a controller circuit for controlling said means, comprising an electro-magnet, a circuit therethrough, circuit divider strips having adjacent ends connected to the elevator and extending respectively downward and up-' cent ends connected to the elevator and ex tending respectively downward, and up ward therefrom, either of which is adapted to form a part of the circuit, means whereby said strips are electrically separated from each other when the elevator is in motion and are connected electrically only after the elevator has come to rest, and means carried with the elevator for closing said circuit, substantially as described.

In an elevator, in combination with means for raising and lowering the elevator, a controller circuit for controlling said means, comprising an electro magnet, a circuit therethrough, circuit divider strips having adjacent ends connected to the elevator and extending respectively down-ward and -up wardtherefrom, either of which is adapted to form a part of the circuit, means whereby said strips are electrically separated from each other when the elevator is in motion and are connected electrically only after the elevator has come to rest, means for regulating the time after the elevator comes to rest when said strips are electrically connected, and means at each floor ,on the elevator shaft for closing said circuit, substantially as described.

l. in an elevator, in combination with means for raising and lowering the elevator,

'a controller circuit for controlling said means,

comprising an electro-magnet, a circuit therethrough, circuit divider strips, having adja cent ends connected to the elevator and extending respectively downward and upward therefrom, means for winding up the end of either strip as the elevator moves toward said end, either of which is adapted to form a part of the circuit means whereby said strips are electrically separated from each other when the elevator is in motion and are connected electrically only after the elevator has come to rest and means at each floor on the elevator shaft for closing said circuit, substantially as described.

5. in an elevator, in combination with means for raising and lowering the elevator, a controller circuit for controlling said means, comprising an electro-magnet ,a circuit therethrough, circuit divider strips having adjacent ends connected to the elevator and eX- tending "respectively downward and upward therefrom, either of which is adapted to form a part of the circuit, means whereby cent ends connected to the elevator and eX- tending respectively downward and upward therefrom, means for winding up the end of either strip as the elevator moves toward said end, either of which is adapted to form a part of the circuit means whereby said strips are electrically separated from each other when the elevator is in motion and are connected electrioally'only after the elevator has come to rest, said means com prising a controlling device permitted to move easily from its central position outward in any direction whilevariably restrained in its return movement, and means at each floor on the elevator shaft for closing the said circuit, substantially as descril: ed.

7. In an elevator, in combination with means for raising and lowering the elevator, a controller circuit for controlling said means, comprising an. electro magnet, a circuit therethrough, circuit divider strips having adjacent ends connected to the elevator and,

extending respectively downward and u ward therefrom, means for winding up tile end of either strip as the elevator moves toward said end, either of which is ada ted to form a part of the circuit means whereby said stripsare electrically separated from each other when the elevator is in motion and are connected electrically'only after the elevator has come to rest, said means comprising a controlling device permitted to move easily from its central position outward in any direction while variably restrained in its return movement, and means at each floor on the elevator shaft for closing the said circuit, and consisting of a cylinder, a piston moving therein and an operative connection between said piston and the friction device brought into use only upon the return movement of v the latter, substantially as described 8. In an elevator, in combination with means for raising and lowering the elevator, a controller circuit for controlling said means, comprising an electro magnet, a circuit therethrough, circuit divider strips having adjacent ends connected to the elevator and cxtendingrespectively downward and upward therefrom, means for winding up the end of either strip as the elevator moves toward said end, either of which is adapted to form a part of the circuit means whereby said strips are electrically separated from each other when the elevator is n motion andare connected electrically only after the elevator has come to rest, said means comprising a controlling device permitted to move easily from its central osltion outward in any direction while varia ly restrained in its return movement, andmeans at each floor on the elevator shaft for closing the said circuit, and consisting of a cylinder, a piston between said piston and the friction device brought into use only upon the return moveclosing, a ratchet wheel, pawls either of which is adapted to engage and advance the ratchet wheel when moving in one of its directions but passing freely over the same in the other direction, cams for disengaging said pawls when said operative connection is moving from its central to its outer position, a gear wheel moving with the ratchet wheel and a pinion geared thereto, and an operative connection between the iston and pinion, substantially as described 9] lin an elevator, in combination with a controller circuitfor controlling said means, comprising an electro magnet, a circuit therethrough, circuit 'dividerstrips having adjacent ends connected to the elevator and extending respectively downward and upward therefrom, either of which is adapted to form a part of the circuit, means whereby said strips are electrically separated from each other when the elevator is in motion and. are connected electrically only after the elevator has come to rest, and means at each floor on the elevator shaft for closing said circuit, one side of said circuit having two branches, a ush button at the floor of the elevator shaft corresponding with the magnet in one of said branches, and a push button in the elevator inthe other branch substantially as described.

' 10. in an elevator, the combination. ofa circuit for controlling the movement of the elevator, said circuit passing in series through a break at each floor of the shaft adapted to be closed by the corresponding door when closed/said circuit having branches, one for each floor of the shaft, each such branch having a break therein means actuated by the elevator moving ast any floor for changing thedirection of t 1e motive power set in action by the closing of the motor circuit at that floor, and means at each floor for closing the corresponding latter break, substantially 1 as described.

means for raising and lowering the elevator,

moving therein and an operative connection o ment of the latter operative connection in 8 senses 11. In an elevator, the combination of a circuit through the motor, one side of said circuit having branches, onefor each floor of the elevator and each such branch having a break therein, said circuit then passing through a series of breaks, each adapted to be closed by the closing of the corresponding door at that floor, andmeans for closing the first break at any floor, operable from said floor, including a double. switch, and a branch through the armature of the motor connected with said double switch, said double switch adapted to be moved by the eleva tor when passing, substantially as described.

12. In an elevator, the combination of'a motor a circuit therethrough, a switch carrier at each floor of the shaft, having -a switch, one side of the circuit through the motor being connected in parallel with all of said switches, a wire connected in parallel with theother side of the switch, said wire leading through a series of breaks one at each door of the elevator shaft and adapted to be closed by the closing of said door, a latch for holding said switch open, an electro-magnet for breaking said switch to permit it to close, and means for energizing said magnet at the corresponding floor of the elevator shaft, substantially as described.

13. In an elevator, the combination of a motor, a circuit therethrough, a switch carrier at each floor of the shaft, having a switch, one side of the circuit through the motor being connected in parallel with all of said switches, a .wire connected in parallel with the other side of the switch, said wire leading through a series of breaks one at each door of the elevator shaft and adapted to be closed by the closing of said door, a latch for hold- .ing said switch open, an electro-m'agnet for breaking said switch to permit it to close, and means for selectively energizing said magnet from the e'levator,'substantially as described. i

14. In an elevator, the combination of a motor, a circuit therethrough, a switch carrier at each floor of the shaft having a switch, one side of the circuit through the 'motor being connected in parallel with all of said switches, a wire connected in parallel with the other side of the switch, said wire leading through a series of breaks one at each door of the elevator shaft and adapted to be closed by the closing of said door, a latch for holdmg said switch open, an electro-magnet for breaking said switch to permit it to close, a

' push button at the corresponding fioor'of the shaft in one side of the circuit through the magnet, a break in the other side and a devicefor closing said break when the elevator is moving toward said floor, and for opening said break when moving away therefrom, substantially as described.

15. In an elevator, the combination of a motor a circuit therethrough, a switch carrier at each floor of the shaft having a switch, one side of the circuit through the motor being connected in parallel with all of said switches, a wire connected in parallel with the other side of the switch, said wire leading through a series of breaks one at each door of the elevator shaft and adapted to be closed by the closing of said door, a latch for holding said switch open, an electro-magnet for breaking said switch to permit it to close, a latch for holding each door open, an electromagnet for withdrawing said latch, a circuit through said electro magnet, and means whereby said circuit is broken and the withdrawal of the latch rendered impossible until after the elevator has been at rest a predetermined period of time, substantially as described.

16. In an electric elevator, a motor check comprising, in combination with the main motor, arheostat, a small motor, one of the wires leading to the main motor having a break closed by two circuits in parallel, of which one circuit leads to the. rheostat and the other leads through the small motor, the latter circuit having a break therein, a switch for closing said break, a lever having an arm passing successively over contacts of the rheostat, said lever being operatively con nected with said switch, and a spring resisting said movement, substantially as described.

17. In an electric elevator, a motor check comprising, in combination with the main motor, a rheostat, a small motor, one of the wires leading to the main motor having a break closed by two circuits in parallel, of which one circuit leads to the .rheostat and the other leads through the small motor, the

latter circuit having a break therein, a switch for closing said break, a lever having an arm passing successively over contacts of the rheostat, said lever being operatively connected with said switch, and a spr ng resist- 'ing said. movement, and means for moving said lever from the revolution of the small motor, a magnet on a branch parallel with the circuit through the rheostat, said magnet being adapted to hold said lever when energized, substantially as described.

18. In an electric elevator, in combination with an elevator, a series of elevator doors, an electric circuit, and a motor in said circuit for operating the elevator, a series of resistances arranged to be successively thrown into saidcircuit by the opening of an elevator door to diminish the current therein and check the speed of the motor, substantially as described.

19. In an electric elevator, in combination with an elevator, a series of elevator doors, an electric circuit, and a motor in said circuit for operating the elevator, a series of resistances arranged to be successively thrown into said circuit by the opening 'ofan elevator door F our hands in the presence of two subscribing to diminish the current therein and check the sgeed of the motor, and means whereby, when t e door is fully thrown open, said circuit is 5 opened at said break, substantially as described.

In witness whereof we have hereunto set witnesses.

- CARL NAUJOKS.

F. O. NAUJOKS.

Witnesses:

BESSIE GORFINKEL, F. M. WRIGHT.

Images