US1768361A - Control apparatus for electrically-operated elevator signals - Google Patents

Description

-.lune 24, 1930.

F. E. KALTE CONTROL APPARATUS FOR ELEGTRICALLY OPERATED ELEVATOR SIGNALS -2 Sheets-Sheer.

Filed June 26 1925 'l vENToR uw. um

ATTORNEY Julie 24,v 1930- `F. E. KAL'IYE 1,768,361

CONTROL APPARATUS FOR ELECTRICALLY OPERATED ELEVATOR SIGNALS yFiled June 2e, 1925 2 sheets-sneer 2 INVENTOR F162 g@ I 4 A ORNEY Patented June 24, 1930 UNITED STATES PATENT OFFICE FRED E. KALTE, OF LOS ANGELES, CALIFORNIA, ASSIGNOR TO RANDALL CONTROL & HYDROMETRIC CORPORATION, F LOS ANGELES, CALIFORNIA CONTROL APPARATUS FOR ELECTRICALLY-OPERATED ELEVATOR SIGNALS Application led .Tune 26,

My invention relates to means for restoring the circuits of the signal devices which indicate the direction of the travel of an elevator car and the signals which indicate the directions that users thereof desire to go. Heretofore there have been provided switches at each floor traversed' by the elevator car which, when closed, cause the restoration of the signal circuits. These switches have 1o sometimes been closed by the commutators,

sometimes by devices carried by the cars and sometimes by means operated by the gates which closes the openings to the elevator shaft.

It is the object of my invention to provide a single switch which is electrically connected to relays and the various segments of the commutator whereby the various signals can be restored, which switch is operated by the 2o mechanism that prevents the movement of the car. A further object is to provide a uick acting switch whereby arcing is reuced to a minimum.

In the drawings forming a part of this application Fig. 1 is a diagrammatic representation with arts in elevation and parts broken away of) two elevator cars provided with the usual signaling devices and apparatus, and equipped with my improved switch.

Fig. 2 is an enlarged detail of my improved switch and associated parts, partly diagrammatic and with parts broken away and with parts of'the car and mechanism carried thereby shown in associated relation in dotted lines.

Referring to the drawings, particularly Fig. 2, 5 and 6 are sheaves mounted in the top of the shaft over which a cable or chain 7 passes. One end of chain 7 s connected by a composite wire and rod mechanism to one end of lever 8 which is pivotally mounted on bolt 9 in the bottom of the elevator shaft. At each floor is a mechanism for operating this wire and rod and as all are alike only one is illustrated and described.

Thismechanism consists of a bell crank lever 10 which is pivotally mounted in the elevator shaft by bolt 11. One arm of lever 10`carries a stud l2 through which passes a rod 13. Theconnection 14 between rod 13 1925. Serial No. 39,791.

and chain 15 at the top of the rod normally rests upon stud 12 and the rod is of such length that when lever 10 is operated at any floor the rods at all the other floors will reciprocate in the studs 12 of those floors without affecting the levers 10 of those floors. A link 16 is connected to the other arm of lever 10 and to a lever 17 pivotally mounted at 18 on the elevator shaft. Lever 17 carries at its lower end a stud 19. To lever 8 is attached a weight 2() which returns the wire to its normal position as shown in Fig. 2 after being operated as hereafter described. To the other end of lever 8 is attached a wire 21 which is connected to a rod 22. Rod 22 passes through the master switch frame 23 and through the restoring switch frame '24 and is connected by wire 25 to chain 7. Frame 23 carries mechanism not shown, which is wired to control the movement of the car as follows:

When the operator in the car desires to stop the movement of the car he stops its movement in the usual manner. He then operates a shoe 26, shown in dotted lines in Fig. 2 by means of a bar 27 which can be depressed by a pedal, not shown, pressed upon by the foot or a lever, not shown, operated by hand, the pedal or lever being connected to the bar by a chain 27 Bar 27 is connected to bell crank levers 28 and 29 and said levers are pivotally mounted on the car, not shown, and are also connected to shoe 26. When bar 27 is depressed shoe 26 engages stud 19 and thereby causes lever 1() to raise wires and rods, 15 and 13 and at the same time wire 21 and rod 22 are lowered through frames 23 and 24. This movement shuts off the power operating the car. The shaft door at that landing can then be opened and passengers admitted to or discharged from the car. The shaft door carries an arm 30 which, when the door is opened, passes under the outer end of lever 10 and holds it in an elevated position until the door is closed so that the car cannot be started until the shaft door is closed.

At each floor are push buttons for signaling that a passenger wishes lto go up or down. These push buttons, when operated,

are insulated from the frame.

close circuits which energize the call relays. The armature of the call relays form a part of the call sional circuits and are held in a position to keep the call signal circuits closed by the armatures of the restoring relays.

So far I have described the car control mechanism as it relates to my restoring mechanism which I now describe in detail. Frame 21 carries contacts 31 and 32 which Contact 31 is connected by wire 33 (see fig. 1) to reset feed strips 34 of the commutators 35 and 36, one for each car. Contact 32 is connected by wire 37 to the release relays 1 and 2. Relays 1 and 2 are connected by wires 38 to reset segments 40 and 41.

A cross head 42, in casing 24, (Fig. 2) is carried by rod 22 and is insulated from both. On 42 is pivotally mounted fingers 43 and 44, the free ends of which are connected by spring 45. 1When the free ends of these ngers are below the plane of the pivots that connect the fingers to the cross head, the fingers are held out of engagement with confacts 31 and 32 which is their normal position as shown in Fig. 2. When cross head Ll2 is lowered these fingers engage lugs 46 and L17 on casing 24 and the free ends thereof are moved above the plane of the pivot-s that hold the fingers on the cross head when spring 45 pulls them quickly up.

In their uppermost position the free ends of the fingers do not quite engage contacts 31 and 32.` but when the door is closed and arm 30 is withdrawn from its position holding the outer end of lever 10 elevated, weight 2O on lever 8 brings down that side of wire and rods and raises the other side, thereby carrying the cross head upwardly and causing the free ends of the fingers to momentarily engage contacts 31 and 32. At this time the reset segment of the commutator of that particular floor is connected by a brush not shown with the reset feed stri of the commutator and the relay circuit 1s closed and the reset relay is energized which withdraws its armature from locking the signal circuit open and the signal circuit is restored.

Current is supplied to the device from live wires or means which lead to a main switch 51 of the usual knife type. The primary windings of transformers 52 and 53 are connected in multiple to this switch. The positive terminal of transformer 52 has the wire 37 leading from the Contact 32 connected thereto. A wire 541 leads from the positive terminal of the secondary winding of the transformer 53 and is provided with branches 55 leading each to the fixed points of a single throw double blade switch 56 located in a respective elevator cab or car. At each of these switches one fixed Contact point is connected to a lamp 57 from whence a wire 58 leads to the contact segments 59 and 60 of the commutators for the respective cars. The other fixed contact point of the switch 56 has a wire 61 connected there to which has the floor signal lights 62 connected to it in multiple. lires 63 connect respective lights 62 to respective commutator segments 64. At the several floors of the building are the signal push buttons 65 which are connected in multiple by a wire 66 with the wire 37 and thus with the positive terminal of the secondary of transformer 52. From each respective push button leads a wire 67 which connects with one terminal of a magnet 68 of one of the relays. The other terminals of these relays are connected by wiring 69 with the negative terminals of the two transformers. Adjacent each magnet 68 is a fixed contact 70 which is engaged by the armature 71 of said magnet upon the latter being energized and these fixed contacts are connected by wires 72 with the commutator relay segments 73. The armatures 71 are connected to the wiring 69 in multiple with the magnets. Latches 7 2 forming armatures for the release magnets 73 hold the armatures 71 locked in engagement with the respective contacts upon energization of the magnets 68 by pushing the buttons 65. These magnets 73, like the magnets 68, are connected by the wiring 69 to the transformer negatives. Also each magnet 73 is connected to the segments Ll() and 41 by a wire 38 or 39and upon energization the magnets 73 release the armatures 71 and the parts reassume the normal position shown.

A rock arm 74 extends from the shaft 18 and may be operated to rock the shaft and thus move the lever 17 by a rod 75 leading to any convenient place. Provision is thus made for operating the switch controlled by the rod 22 manually when desired.

It will thus be seen that but one switch is used for operating all the restoration circuits, and that its make and break is very quick which prevent-s objectionable arcing and that such switch is operated by the mechanism that unlocks the car operating circuit that the restoration of the signal is not effected until the car operating circuit is in condition to be operated to cause the car to again move.

Having described my invention, I claim: l. In an elevator signaling apparatus in a building having a plurality of doors, in

combination, an elevator car; means to cause il? the stopping and starting of said car; means to lock said car operating mea-ns against starting the movement of the car after it stops at a floor; a signal call circuit for each floor with signals therein; means to lock said signals in operative position when a signal to the car has been given; a restoration circuit having a normally open switch therein, said switch when closed causing the restoration circuit to unlock the call l i in operative position; a restoration circuit having a normally open circuit therein; and means operated by the car operating locking means when said means are unlocked adapted to operate the restoration circuit switch, whereby the signals are restored to normalcy. v

In witness that I claim the foregoing I have hereunto subscribed my name this 20th day of June, 1925.

FRED E. KALTE.

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