US1746851A - Elevator wiring system - Google Patents

Description

Feb. ll, 1930. F. A. BoEDTcHl-:R 1,745,851

ELEVATOR WIRING SYSTEM Filed June 14, 1924 f/gl A; y ,f ATTO/efv Patented Feb. ll, 193@ e s if FRANZ A. BD ED'LGlfylll'y OF BERGENEIELD, NIE-EJ JERSEY, ASSIGNOR T0 OTIS ELEVATOB `Cf)lVIIAZNI'Y, OF JESSEY CTY. JERSEY, A CORPBATION OF NEW JERSEY ELEVATOR WIRING SYSTEM applicati@ filed mme 14,

vV will eliminate a large proportion of the Wiring heretofore necessary for the accomplishment of particular purposes in elevator installation.

In the installation of elevators, as now practised, considerable wiring is required in the shaft. rlhis wiring serves numerous purposes depending upon the type of elevator and also upon the signallingl systems associated therewith. For example, attention may be directed tothe signa-lling circuit of a conventional elevator. i.` e., the circuit by which signals of a waiting passenger may be transmitted to the car operator and subsequently cancelled after thev passenger has been admitted to the elevator.

In circuits of this character, it is quite common to provide up and down push buttons at the several floors of ya building and a suitable signal vor signals in the car adapted to be operated selectively by the pressing of a push button at a floor. The selection of the particular signal or the time at which the signal is given is usually controlled by a commutator in the overhead and Wires run from each push button ,to the commutator and .to the several signals in the car or from each push button to a commutator with a single Wiring connection to a single signal in the car. In a building of many iioors, the duplication of the wiring to the push buttons necessitates a large number of Wires inthe shaft with attendant cost of installation and upkeep. It is not uncommon in the elevator signaling art moreover to provide passenger push buttons which are manually set by the prospective passenger and remain set until the service required is fulfilled. Resetting mechanisms for this purpose ,invariably involve additional Wires leading to the individual push buttons from a commutator in the overhead and thus the wiring is further complicated by individual WilS leading from each ypush buttpn and frequently two wires tem @all Push button .in Order te egft re- 1924. seria-1 No. 720,075.

setting of .either the up or down pus-h buttons.

From these facts, it will be apparent that under present systems, the wiring in the shafting forms a considerable part lof installation costs and upkeep and it is highly important from a practical standpoint to min-- imize in this wiring to the greatest possible eXtent. Attempts have been made to minimize Wiring, but even the most satisfactory of these attemptshave necessitated the use of many wires.

As a result of careful research and experimentation, I have succeeded in producing a novel system of Wiring capable of many uses in elevator installation and through the employrnent of which the complicated wiring heretofore considered essential is made unnecessary and an unusually simple form .of wiring substituted. The principles underlying the system of this invention are capable of incorporation in elevator systems of widely varying kinds and for different purposes, but .the underlying principle of the invention remains the same in allY environments. Broadly stated, the invention consists in dividing an electrical feed or return Wire into a plurality of links or sections adapted to be connected by switches interposed bet-ween the terminals of said sections or links and with each of which switches is associated a .tap line or lead leading .to -an electrical adjunct or appliance. Each switch is operable either to connect the contiguous ends of adjacent links or to connect the preceding link with the electrical adjunct. All of the electrical adjuncts are connected .to a common feed .or return wire. The switches are adapted to be automatically controlled and shifted from one position to Ithe other automatically through kthe act of moving the elevator vertically of lthe shaft and in .the preferred form of the invention, this 4automatic operation is a magnetic operation. In

other words, magnet is mounted on the elel electrical adjunct-s so that one electrical ad- I* magnet will immediately function.

junct is made operable while all of the remaining adjuncts of said lead are made inoperable. To state the matter in another way, the movement of the car automatically effects a building up of a circuit to one of said adjuncts and simultaneously so conditions the system that all other adjuncts will be inopcrative.` This is the underlying principle of the present invention and from what has been said it will be apparent that it is adapted for wide application.r

Inasmuch as it is not feasible to describe the invention in all of its uses to which it may be applied, I will hereinafter specifically describe it in detail in conjunction with its use as a resetting system for elevator signals, but I wish it clearly understood that it is not limited to this particular application.

However, in this connection', I carry out the present invention in a resetting system for elevator signals, which is referred to as illustrative, in substantially the following manner.

At stated intervals vertically of the shaft may be positioned switches adapted to be actuated by a magnet carried by the elevator car. Each of these switches is adapted for two positions. In one position, each switch is adapted to complete a circuit at this pointJ through a resetting magnet of a push button mechanism. All the resetting magnets have a common feed from the source of electrical energy so that one wire leading down the shaft may form a common feed for all of these magnets. A second wire leading from the source of electrical energy passes to the movable arm of the first switch and relatively short links of. single wire connect the second contact of each preceding switch to the movable switch arm of the next succeeding switch.'

As the car moves up the shaft, it automatically sets a-ll the magnet switches of the down resetting circuit to positions to connect each link with a short branch circuit passing through the down resetting magnets, so that as the car stops at the top of the shaft, the only circuit left complete is the circuit through the down resetting magnet for the top floor Vand if the Circuit is not elsewhere broken by some other adjunct, this resetting As the car. moves down the shaft past the uppermost switch, the switch is moved to break the branch circuit through the uppermost magnet and simultaneously connect the next following link of the circuit to the source of electrical energy for the purpose of including in the circuit the next lower resetting magnet. 'l

As the car passes this next switch, it is in turn automatically moved to break the circuit through its corresponding magnet and to connect the next link of the circuit to the source of supply. This operation continues as each switch is passed until the car arrives at the bottom of the shaft at which time all the branch circuits have been cut out.

Features of the invention, other than those specified, will be apparent from thev hereinafter detailed description and drawings, when read in conjunction with the appended claims.

Figure 1 of the accompanying drawings shows a wiring diagram of the system of the present invention as employedin circuits for restoring elevator signals, but it is to be understood that this showing is illustrative onlv iand does not define the limits of the inveriion.

Figure 2 of the accompanying drawings shows a magnetically controlled switch which inaybe used in carrying out the present inyention, but this switch is to be understood as illustrative only and not as showing the only current switchingmechanism that may be employed in this connection.

Inasmuch as it is not feasible in this specification to show all of the uses of which the invention is capable, I 'have' chosen for the purpose of illustration to show the same in conjunction with the resetting of elevatoi`l signals and the drawing is in accordance with this viewpoint. I

In this drawing, I have shown the system complete for one elevator car and in a form adapted to reset both the up and down signals of an installation in a six story building and I have also shown suflicient wiring to illustrate the system as it would be constructed for two cars operating in adjoining shafts, it being understood from this showing-'how the system may be enlarged'to Vprovide for anyv number of cars.

In the showing of the drawing, car I is shown in full lines in connection with the' down resetting side of the system and in dotted lines in connection with the up resetting Side. Y l

l designates any suitable source of electrical currentcapable of actuating the resetting means and is here shown as a generator although in practice batteries may be eniployed. This Source of current supplymay be positioned either in a basement or in an overhead, but is shown vin the drawings as in the latter location.

A single feed wire 2 leads from the source of supply 1 down through the entire length 'lou of the shaft to the first floor. This is the main feed line and at several fioors, which are designated in the drawings, are the usual passenger-s button set mechanism which after being set by the intended passenger are adapted to be reset through the employment f the system shown. Nun'ierous resetting inea-ns may be employed, butV for the purpose of this disclosure, the resetting means for each passengers push button mechanism is shawn as embodying a magnet having' a coil.. The down resetting magnet coils of the several are respectively designated 6, 5d, 4d, 34 and 2, while the cooperating up resetting magnets are ,designated el, 3, 2 and l, These magnets may serve to trip any conventional resetting means or shift annunciator drops or in any other suitable way well known to the art may be constituted to effect a. resetting or cancellation of the signal which has been previously sent in a corresponding direction from the corresponding floor. All of the magnets are tapped directly into the main feed line 2, as shown in the drawings, so as they are .directly fed from this line.

From the opposite pole of the source of supply 1 extend two additional feed lines 3 and 4. The feed line 3 may for present purposes be referred to as the return main for the down resetting magnets of car I. This return lin-e 3 extends from the source of power in the overhead .down the shaft to the second floor. The return l for the 'up resetting i magnets of car I extends down the shaft from the source of power to the first floor and thence u the shaft again to the fifth door in the insta lation shown and for the purpose of clear description that portion of the return 4, which extends up the shaft will bc ret-erred to by the reference .character 4.

Included in the return 3 for the down resetting ma nets of car I is a plurality of magnot operated switches, one of which is posi- A tioned at each floor of the building. These switches are designated 60th 50, 40, 30d and 2G@ for the res 'tive floors. Similar switches 50, 40, 30, 20 and l0 are included in the portion 4 of the up return circuit 4 for car I. These switches are so positioned in the shaft that they are adapted to be magnetically operated 'by a magnet 5 supported on and carried by the car I. in the drawing, the magnet is shown as mounted on top of the car and the switches are so vdisposed in the shaft that when the car is at rest at a floor, the magnet will 'be positioned above the down resetting switch of that floor and below the up resetting switch of said floor. In other words, when the car is at rest at a floor, it wii he interme diate knwo adjacent switches but actually cooperating with neither.

"The parte are se assembled with relation te one. another however that as the Aear moves up and dawn the shaft, the magnet A5 on .said

car will successively serve to automatically operate through magnetic force the resetting switches which relate to that particular car, Each switch embodies a switch arm 6 pivoted intermediate its ends at 7, so that those portions of the switch extending at opposite sides of the pivot form armatures for the magnet on the car so that as the car approaches one side of the pivotthat arm of the switch first passed will be drawn by the ma griet to shift the arm in one direction while soon as the magnet passes the pivot the 0ppositely projecting portion of said arm will be directed by the magnet to shift the switch arm in the opposite direction. Suitable stops, not shown, are provided for limiting the movement of the switch arm in both directions to eliminate overtravel.

Each of these switches moreover is a double pole switch, that is to say, it is adapted to. close a circuit when in either of the positions referred to. and to this end, each switch is provided with two contacts 8 and 9. The switches are so included in the return lead 3 that the wire leading from the source 0f power 1 passes to the pivot 7 of the Switch 60d. This return is continued by connecting the contact 8 to the pivot of the switch 59d, by connecting the contact 8 of the switch 50 to the pivot of the switch 40d and so on down the shaft until the pivot of the switch d is reached. The contact 9 of each of the down resetting;` switches is directly connected to the resetting magnet of the corresponding floor. The up resetting switches are connectcd in return 4 in the same electrical manner,

t may thus be graphically stated that the returns 3 and 4 are composed .of a plurali-ty of links or sections adapted to be Connected or disconnected with a source of current supply through corresponding operation of the switches in these circuits. For example, as shown in the drawings. the switches 6091, 50d, and 30 are all set in such a position that current may be fed from the feed 2 through resetting magnet 2d and through the switch Q0 back to the source of supply.

It will be noted however that the switches 40, 30 and 20 are so positioned that the links which join these switches `are broken from the main return 4. although the link between the switch 20 and 1,0 is included in said circuit by virtue of the particular position of the yarm of 4 the switch 10E. It is because of the abilita te @sunset and dseenneet said links to build up or break down the circuits of which they form a part, which marks efficiency lof the system of this invention and enables it to carry out these functions with an unbelievably sinaH--nuinher et' wines er: tending vertically of .the shaft,

Its usefulness in .this regard iS not limited i0 the epe-ration of resetting devices., its extreme simplicity is apparent from showing in this respect.

The operation of the system in conjunction with the movements of car I will now be described, but it may here be noted that in the resetting system, it is usually desirable to make the resetting conditional upon the giving of the service for which the signal has been previously set. in other words, upon the taking of a passenger onto the car. For this reason, in order to make the system shown thoroughly practical in this connection, I have included switches 11 and 12 in the returns 3 and 4. These switches may be of any suitable construction and operated in any appropriate manner, but, in practice7 they are preferably operated by a governor' controlled from some part of the car installation and in the installations which have been made they have been usually controlled by a governor which serves to automaticall v close the switches after the car has been stopped. subsequently started and has commenced to accelerate. I find this method of operation highly efficient for reasons which will be manifest to those skilled in the art.

In the showing of the drawings. car I has moved down the shaft and stopped at the second floor to take on a passenger. During this movement down the shaft, the magnet 5 carried thereby has passed the several switches d, 50d, 40d and 30 and in so doing has set them to connect the several links of the return circuit with the pivot of the switch arm of the second floor switch 20d. 'I he circuit is complete through the resetting magnet 2d except at the governor switch 11. which, is a normally open switch and is shown open.

Now, if the car starts and continues its downward movement to the first floor. the governor associated with the car will he operated as soon as the car starts and commences to accelerate and the parts are so timed that the closing of the switch 11 will be effect-ed before the magnet 5 reaches the switch 20d. As soon as the switch 11 is closed, an impulse of current will pass through the circuit, which is thus established and will energize the magnet 2fl for the purpose of effecting resetting of the associated signal.

It may be here stated for the purpose of illustration, that the switch 11 may be of a character such as is shown in my issued Patent No. 1,333,240, although any other form of governor controlled switch which will function for a like purpose may be employed without departing from this invention.

The switch 11 preferably however makes but a momentary contact suiiiciently long in duration to insure proper energizing of the magnet and actuating of the adjunctive resetting devices. I prefer to employ but a momentary impulse in order to economize on current consumption and also to preclude overheating.

As the car continues to move down the shaft to the first floor, it will in passing the switch 20d swing it into the dotted line position shown and thus disconnected the magnet 2d from the return leaving all of the magnets of the down resetting circuit disconnected from said return.

It will be noted however that as the car has passed down the shaft from the sixth floor past the switches 50, 40, 30, 20lx and 10, that it has automatically shifted all of the arms of these switches into positions to engage with the cont-acts 9 which are connected with the corresponding up resetting magnets. Thus, as the car reverses its travel and starts in an upward direction and moves, e. g., to the second floor and there stops, it will be apparent that in passing the switch 10 it will automatically shift the arm of the switch to engage the contact 9, thus completing the circuit from the returns 4 and 4 to the pivot of the switch 20u which is connected through the switch arm to the contact 9 of the magnet 2, If a car stops at the second floor` and subsequently starts, the operation will, with the particular kind of governor which hasbeen described, immediately close the switch 12 and cause a current impulse to be passed through the magnet 2 to reset the signal which has previously caused the car to stop at the second iioor. Continuing up the shaft, the car will in turn shift the switch arms of the successive switches in order to build up a resetting circuit behind it, while ahead of it the resetting circuit is incomplete.

It may be here noted that the governors 11 and 12 are so associated with the car that they will operate co-directional therewith. In other words, the parts are so installed that the governor 11 will operate only during the down movement of the car while the governor 12 will operate only during the up movement.

The same result can of course be obtained by placing a single governor switch at m and including directional switches at 11 and 12 instead of making them governor switches. This will be apparent as an alternative to those skilled in the art. Other changes will readily present themselves to such experts and I am aware of many changes which might be made in this system without departing from the general arrangement or from the invention. but it is manifestly not feasible to point out here all of the changes which might be made and which would probably be made in adapting the invention to different environments. I will at this time explain the theorv and show one practical wiring diagram which I consider to be one of the best practical forms of the invention as employed in a signal resetting system.

By making the switches 11 and 12 codirectional with the movements of the car, it will be apparent that no up resetting magnets will be energized during the down movements of the car and no down resetting magnets will be energized during the up movements of the car. In other words, there will be no untimely cancellation of signals.

In the drawings, I have shown enough of the wiring for a second car designated car II to illustrate how the system may be enlarged to apply to more than one car and this arrangement can manifestly be duplicated for any number of cars. In view of the simplicity of the arrangement, it is not thought necessary to describe the manner in which the second car causes functioning of the system since it operates in the same manner as has been described with reference to car I.

It may be here noted however that in the system as shown, it is assumed that only one up push button and one down push button are positioned at each floor for the particular` bank of elevators with which the system is shown as associated. If a plurality of push buttons are employed at each floor for both up and down directions, the only change that would be necessary would be to duplicate the resetting magnets in multiple, but this is an arrangement that would not be ordinarily used.

It will be apparent from the detailed description of the invention as applied to resetting-systems for elevators that the system is unusually simple and embodies few wires extending vertically of the shaft. As a matter of factin a one car installation, for example, and for any number of floors, the only wires for resetting which would be required to ei;- t'end longitudinally of the shaft are the main feed wire 2 and the return wires 3, 4 and 4. In other Words, four Wires can accomplish in this system for an installation through a large number of floors where it has heretofore been necessary to employ substantially twice the number of wires as there are floors, one set of wires being for the up restoring and another set for the down restoring. This will give some idea of the importance of the present invention from a commercial standpoint. For example, in an installation of six floors as shown, `applicant may employ four vertical leads for the resetting and one of these vertical leads may be the main feed which also feeds the setting circuits.

According to prior practice, the same installation would include at least thirteen Wires extending vertically of the shaft. In other words, I am enabled to employ but a small fraction of the wiring heretofore necessary to accomplish the same purpose and consequently am able to install these circuits at a far lower cost than has heretofore been possible, both from the standpoint of material employed and from the more important standpoint of labor and upkeep.

It is to be noted that by the greatly simplified form of construction illustrated, the well known commutator machines generally used in connection with the resetting circuits are entirely eliminated and at the same time a thoroughly selective system is produced. There is as a matter of fact a very nice cooperation between the up and down switches. lllhile one circuit is being built up the other circuit is being broken up into its constituent sections or links lVhile a circuit appropriate to the particular direction in which the ear moving will be built up to supply an electrical adjunct or instrument ahead ofthe rar, while the adjuncts or instruments which the car has passed will be automatically cut out of the main circuit. Only one instrunient or adjunct is operativo at any one time from any particular car, although some other adjunct or instrument may be and probably would be in practice responsive to the operations of some other car of the bank.

It will be noted that I have shown switches ll included in the tap lines which also includes the resetting magnet l. One of these switches may he associated with the tap lines of all the other resetting magnets but one is simply shown in coniunction with the magnet l for the purpose of illustration. These switches l-l are preferably of the character shown and described in my prior patent hereinhefore referred to and are designated l2 in ,Fixture 4 of the drawings of such patent. This typo of switch is a mechanically locked switch and is manually locked' as when the prospective passenger presses a push button. Vhen the magnet is energized, the switch is automatically opened. Any other type of switch may be used in this connection or this switch may be omitted, but I prefer to use it in practice for reasons which will be apparent to those skilled in the art.

From the illustrative showing of the invention which has been advanced, it will appear that the broad underlying principle thereof consists in utilizing one lead to operate 'a number of electrical devices positioned in sc- :pience vertically of the shaft and to utilize :i moving element on the elevator successively and automatically control. switches included in said lead wherebyv the passage of the elevator longitudinally of the shaft automatically renders the electrical adjuncts which it passes inoperative and sin'iultancously prepares the nent preceding adjunct for operation. This principle is manifestly not limited for eniploymcnt to resetting systems, but may be carried out in a wide variety of uses such, for example, in setting systems or in automatic control systems wherein elevator cars are operated automatically and without an attendant as well as in a variety of other uses in the elevator art which will readily suggest themselves to those sitilled in this art. For those reasons, I have simply shown one vthoroughly etlicient and practical embodiment of the invention and wish it clearly understood that the invention as broadly novel as is commensurate with the ppended claims Having thus fully described the invention what I claim as new and desire to secure by Letters Patent is:

l. A wiring system for elevators embodying a source of current supply, a plurality ot' electrically operated adj uncts, a main leading from the source of current supply to said adjuncts, a second main leading from the source of current supply and comprising a succession of sections, a two-way switch hetween each two adjacent sections and associated with one of said adjuncts, whereby each switch will serve in one position to disconnect two adjacent sections and simultaneously connect the corresponding adjunct to the main and, in another position, to disconnect said adjunct and join said adjacent sections, and means carried by the elevator car for operating said swi ches, said switches being shiftable only when operated by the said means on the car.

2. A wiring system for elevators embodying a source of current supply, a plurality ot electrically operated adjuncts, a main leading from the source of current supply to said adjuncts, a second main leading troni the source of current supply and comprising a succession of sections, a two-way switch between each two adjacent sections and associated with one of said adjuncts, whereby each switch will serve in one position to disconnect two adjacent sections and simultaneously connect the corresponding adjunct to the main and, in another position, to disconnect said adjunct and join said adjacent sections, and electromagnetic means carried by the elevator car for operating said switches, said switches being shiftable only when operated by the said means on the car.

3. A wiring system for elevators embodying a plurality of switches arranged in spaced relation vertically of the elevator shaft, certain of which are appropriate to up movement of the car and others of which are appropriate to down movement of the car, a source of current supply, an electrical conductor leading from said source and including all of the up switches in series, an electrical conductor leading from said source and including all of the down switches in series, a plurality o't' up electrical devices connected to the up switches, a plurality of down electrical devices connected to the down switches, electrical feed or return connections between said adjuncts and the source, electromagnetic means movable in unison with the car for operating all ot said switches, and means for causing the operation of only the devices for the appropriate direction of movement of the car.

4. A wiring system for elevators embodying a plurality of switches arranged in spaced relation vertically of the elevator shaft, certain of which are appropriate to up7 movement of the car and others of which are appropriate to down movement of the car, a source ot' current supply, an electrical conductor leading from said source and including all of the up switches in series, an electrical conductor leading from said source and including all of the down switches in series, a plurality of up electrical devices connected to the up switches, a plurality of 'down7 electrical devices connected to the down switches, electrical feed or return connections between said adjuncts and the source, a single electromagnet mounted on and carried by the ear for operating all of said switches in succession, and means for causing the operation of only the devices for the appropriate direction of movement of the car.

In a wiring system for elevators, a plurality of two-way switches corresponding to several floors ot a building and arranged in spaced relation vertically of the shaft, a source ot current supply, an electrical conductor leading' from the source of current supply and embodying a succession of sections respectively connecting the successive switches to one another and adapted to collectively connect the switches in series with the current source when the switches are in positions to bridge the adjacent termini of adjacent conductor sections, a plurality of electrical devices electrically connected to poles of the switches which are out of circuit when all of the sections are in series, a common current return for said devices, and means carried by the car for operating said switches to accumulatively connect the sections in series when the car moves in one direction, and to successively place said devices individually in series with a correspondin gly decreasing number of said sections when the car moves in the opposite direction, each et said switches being constituted to maintain the position into which it is operated until a subsequent operation.

G. In a wiring system for elevators, a plurality of n'iagnetically operable two-way switches corresponding to several floors of a building and arranged in spaced relation vertically of the shalt, a. source ot current supply, an electrical conductor leading from the source of current supply and embodying a succession ot sections respectively connecting the successive switches to one another and adapted to collectively connect the switches in series with the current source when the switches are in positions to bridge the adjacent termini of adjacent conductor sections, a plurality ot' electrical devices electrically connected to poles of the switches which are out of circuit when all ot the sections are in series, a common current return for said devices, and electromagnetic means carried by the car for operating said switches to accuniulatively connect the sections in series when the car nieves in one direction and to successivelv place said devices indi idually in series with a correspondingly decreasing number of said sections when the car moves in the opposite direction, each of said switches being constituted to maintain the position into which it is operated until a subsequent operation.

7. A wiring system for elevators embodying a source of current supply, at least two main conductors leading from the source of suoply vertically of the shaft, branch conductors extending between tile main conductors in multiple and including electrically operated adjuncts, a two-way switch positioned at the junction ot' cach branch with one main to divide said main into a succession of sections, each of said switches comprising line and branch contacts, thil turnier of which are connected to the adjacent sections, and the latter of which are connected to said branch conductors, and means carried by the car for shifting the switchesI to connect the sections through the line contacts and simultaneously cut olf the branches, and to successively and individually connect the branches to the main and cut otf the main beyond the connected branch, said switches boing shiftable only when operated by the means on the car.

8. A wiring system for elevators embodying a source of current supply, at least two main conductors leading from the source of supply vertically of the shaft, branch conductors eX- tending between the main conductors in multiple and including electrically operated adjuncts, an electro-magnetically operated twoway switch positioned at the junction ol each branch with one main to divide said main into a succession of sections, each of said switche comprising line and branch contacts, the former of which are connected to the adjacent sections, and the latter of which are connected to said branch conductors, and a magnet common to all the switches and carried by the car for shifting the switches to connect the sections through the line contacts and simultaneously cut otf the branches, and to siufcessively and individually connect the branches to the main and cut oil' the main beyond the counected branch, said switches being shittable only when operated by the means on the car.

A wiring system for elevators embodying a source of current supply, electrical operated adjuncts positioned at several consecutive lloors of the building in which the system is installed, a main conductor leading from the source of supply vertically along the shaft, branch conductors tapped from said main at the several tioors and leading to the adjuncts at said floors, a second main conductor leading from the source of supply vertically along the shaft and divided into sections extending between the several floors in succession, a magnetically operated two way switch mounted in the elevator shaft between the adjacent ends of each two sections with its line contacts connected to said sections, a branch connection leading from each adunct to a branch Contact of the corres ending switch, whereby each of said ches is adapted when in one position to connect the adjacent ends ot two sections and simultaneously cut out the branch connection leading to the corresponding adjunct and when in another position to disconnect said sections and connect the branch of the corresponding adjunct to the main, and a magnet movable in unison with the elevator' car and adapted to operate said switches in succession, when the magnet is moved past the switches.

l0. A wiring system for elevators embodyin g a source of current supply, electrical operated adjuncts positioned at several consecutive floors of the building in which the system is installed, a main conductor leading' from the source of supply vertically along the shaft, branch conductors tapped from said main at the several floors and leading to the adjuncts at said floors, a second main conductor leading from the source of supply vertically along the shaft and divided into sections extending between the several floors in succession, a magnetically operated two way switch mounted in the elevator shaft between the adjacent ends of each two sections with its line contacts connected to said sections, a branch connection leading from each adjunct to a branch Contact of the corresponding switch, whereby each of said switches is adapted when in one position to connect the adjacent ends of two sections and simultaneously cut out the branch `connection leading to the corresponding adjunct and when in another position to disconnect said sections and connect the branch of the corresponding adjunct to the main, and a magnet mounted on and carried by the elevator car and adapted to operate said switches in succession when the magnet is moved past the switches.

l1. In a wiring system for elevators, a plurality of magnetically operable two-way switches corresponding to the yseveral floors of a building and arranged in spaced rclationy a .source of current supply, an electrical coilductor leading from the source of current supply and embodying a succession of scctions respectively connecting the successive switches t0 one another and adapted to collectively connect the switches in, series with the current source when the switches are in positions to bridge the adjacent termini of adjacent conductor sections, a plurality of electrical devices electrically connected to poles of the switches which are out of circuit when all the 'sections are in series, a common current return for said devices, and electromagnetic means movable in timed relation with the car past the switches for operating said switches to accumulatively connect the sections in series when the car moves in one direction and to successively pl'ace said de'- vices individually in lseries with a correspondnio ingly decreasing number of said sections when the car moves in the opposite direction, each of said switches being constituted to maintain the position in to which it is operated until a subsequent operation.

l2. A wiring system for elevators comprising a source of current, a conductor leading from one side of said source, a plurality of electrical devices, one for each Hoor, connected to said conductor, another' conductor connected to the other side of said source, said other conductor comprising a plurality of conductor sections, one for each floor, a plurality of switching mechanisms, one for each floor, operable to connect said electrical de vices to and disconnect them from the corresponding conductor sections and to connect said conductor sections in series relation and disconnect them from one another, and means moved in accordance with car movement for causing the successive operation ot said switching mechanisms to disconnect the corresponding devices from the corresponding conductor sections and connect said sections in series relation, during travel of the car in one direction, and to disconnect said conductor sections from each other and connect the corresponding devices to the corresponding sections, during travel of the car in the opposite direction, each of said switching mechanisms, once operated by said means moved in accordance with car travel during travel of the car in either direction, remaining so operated until again operated by said means during travel of the car in the opposite direction.

13. A wiring system for elevators comprising a plurality of switch mechanisms corresponding to the several floors of a building, a source of current supply, an electrical conductor leading from the source of current supply and embodying a succession of conductor sections respectively connecting the successive switching mechanisms to one another and adapted to collectively connect said mechanisms in series with the current source when the switching mechanisms are in conditions to bridge adjacent termini of the respective conductor sections, a plurality of electrical devices, one for each floor, an electrical conductor leading from the source of current supply to all of said devices, each of said devices being connected to the switching mechanism of the corresponding floor to be energized through said mechanism when said switching mechanism is in a condition to disconnect the termini of the conductor sections with which it is associated, and electromagnetic means movable in timed relation with the elevator car past the switching mechanisms for causing the operation of the switching mechanisms to disconnect the sections and connect the electrical devices to the conductor which embodies said sections, each of said switching mechanisms being con- FRANZ A. BOEDTCHER.

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