US2418104A - Signaling arrangement in a cable system - Google Patents

Description

March 25, 1947. E. WIDEN ET AL 2,418,104

SIGNALING ARRANGEMENT IN A CABLE SYSTEM Filed Jan. 5, 1944 ATTORNEY Patented Mar. 25, 1947 SIGNALING ARRANGEMENT INA CABLE SYSTEM Erik Widen, Angby, and Gunnar Lindahl, Vasteras, Sweden, assignors to Allmiinna Svenska Elektriska Aktiebolaget, Vast'eras, Sweden, a corporation of Sweden Application January 5, 1944, Serial No. 517,062 In Sweden August 16, 1943 2 Claims. 1 The present invention relates to cable ways which are divided into a plurality of individually driven sections.

Cable ways are generally provided with two parallel suspension cables, on which the cages run in one direction on one cable and in the other direction on the other cable. The driving machinery for the transport of the cages is generally arranged at one end on the way and the power transmitted to the cages by means of an endless traction line, to which the cages are hooked by means of a special friction device. At the end stations, the cages are liberated from the traction line and moved on a suspension railway for filling or emptying.

In long cable ways, it is necessary to divide the way into a plurality of sections, each section being provided with its driving machinery. The different driving machineries are separately started and stopped by the supervisor in the section points.

The individual start of the different driving machineries is, however, combined with a considerable disadvantage, in that at the great distances between the section points it is very difficult to achieve a simultaneous start of all sections, and if a supervisor on one section should neglect to start his driving machinery an accumulation of the cages at the ends of the adjacent sections will take place.

The present invention has for its object an arrangement for a simultaneous start of all driving machineries by current impulses sent out from one end station and acting on starting relays arranged in the section points. These starting relays are inserted in an operating line going along the cable way, and according to the invention this operating line in each section point also is provided with a manually operated contact, which contacts are inserted in series in the operating line and on operation cause the connecting-in of the starting relays. This operating line also serves for the transmission of signals and telephone messages to the supervisors in the section points.

The starting impulses may suitably be direct current impulses, whereas the signals may be achieved by means of an audible frequency alternating current, which can pass the opened start ing contacts through filters or condensers shunted to them, which filters allow the audible frequency alternating current to pass, but block the direct current impulses. Instead of using a coherent operating line along the cable way, the operating line may be divided up into a plurality of sections, which are joined by means of relays, each section being provided with a local current source. An impulse sent out from one end of the way will then cause a successive operation of the relays in the section points, and thus a successive closing of the circuits formed by the different sections. The signal impulses again and also the telephone messages pass these relays by means of special filters or passage condensers,

On the accompanying drawing, one form of the invention is shown. On the drawing, l designates the end station and 2 the starting station of the cable way and 2' the section stations. 3 are the driving machineries and 4 the driving motors with their starting apparatus 5.. 6 are manually operated contacts arranged in the sta-. tions, for instance push buttons, which are inserted in the operating line 9 going along the cable way. 1 are the traction cables and 8 the suspension cables and I0 rails for the cable way cages and II suspension rails for conveying the cages from one section to the other and at the ends stations for the transport of the cages to the loading or unloading place. l2 are condensers, which are coupled in parallel with the push button 5, which condensers have for their purpose to allow the signal and telephone currents to go along the operating line, when the push button is not operated, i. e., is open.

By this arrangement, the attention of all supervisors is struck when the cable way shall be started, but a start of the driving machineries cannot take place before all supervisors are on their places and operate the said push buttons. By the arrangement according to the patent, the advantage is reached that the cable way cannot be started before all supervisors are on their places and by operating the push buttongive a sign that everything in the section point in question is all right.

We claim as our invention:

1. Arrangement in cable ways divided into a plurality of sections, comprising separate driving machinery for each section, an operating line extending along the cable way and over which a starting direct current or low frequency impulse for the said driving machineries can be sent, in each section point of the cable way a manually operated contact device making contact only when subject to pressure, means connecting all of said contacts in series, so that a starting impulse can proceed to the different section points only when all contacts are operated, and means shunting eachj'of said contact devices, so that audible frequency or high frequency signals and telephone messages can be sent out to all supervisors along the cable Way.

2. Arrangement according to claim 1, in which 5 the operating line is divided into a, plurality of sections forming separate circuits, each provided with a local current source for the starting impulse, the difierent sections being joined by means of relays for transmitting the starting impulse from one section to the following and joined by means of condensers for the transmission of signals and telephone messages.

ERIK WIDEN. GUNNAR LINDAHL.

REFERENCES CITED The following references are of record in the file of this patent:

UNITED STATES PATENTS

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