Signal transmission arrangements for railroad interlockings

Claim 2

A signal transmission arrangement for a railroad interlocking, said interlocking controllable to establish a selected one of at least two different routes through said interlocking for an approaching train prior to its arrival, the interlocking rails forming a plurality of distinct track sections each extending between two predetermined points within the interlocking limits, each train provided with apparatus for the transmission of selected signals between corresponding wayside and train carried apparatus, comprising in combination, a. circuit control means responsive to the route selection for establishing predetermined circuit connections corresponding to the selected route, b. a signal transmission wire positioned adjacent to and extending the length of each rail in each distinct track section, C. said circuit control means connected for connecting the signal transmission wires of adjoining sections selected in accordance with the established route into a single complete loop parallel to the entire established route and including a connection to said wayside apparatus to carry the selected signals being transmitted between the train carried and wayside apparatus.

Claim 3

A signal transmission arrangement as defined in claim 1 in which said circuit control means comprise switch circuit controller contacts selectively closed in response to the positioning of the track switches of said interlocking to establish a selected route.

Claim 4

A signal transmission arrangement as defined in claim 2, in which, a. the transmission wires adjacent the rails in adjoining sections included in a selected route are connected over selectively closed switch circuit controller contacts to form a single complete loop parallel to the established route for a train, b. said loop further including a preconnected cross connection between the opposite rail wires at least at one end of said established route and a connection to said wayside apparatus at a preselected point along said route to carry said signals between the train carried and wayside apparatus.

Claim 5

A signal transmission arrangement as defined in claim 2, further including, a. cross connections between said transmission wires adjacent opposite rails at selected ones of the points within said interlocking which may at times become an end of a selected route, b. connections from the transmission wires to the wayside apparatus at each other point which may at times become an end of route, c. each completed loop including the transmission wires of adjoining sections included in the established route, switch circuit controller contacts closed in accordance with the established route, a cross connection, and a wayside apparatus connection.

Claim 6

In a railroad interlocking controllable for establishing a selected one of at least two different routes for an approaching train prior to its arrival, the interlocking rails forming a plurality of distinct track sections each extending between two predetermined points within the interlocking limits, each train traversing said interlocking being provided with speed signaling apparatus controlled by speed command signals normally inductively received through the rails from a wayside source of such signals, a speed command signaling arrangement for said interlocking comprising in combination, a. circuit control means responsive to route selection for establishing predetermined circuit connections corresponding to the selected route, b. a signal transmission wire positioned adjacent to and extending the length of each rail in each distinct track section, c. said circuit control means connected for connecting the signal transmission wires adjacent the rails in adjoining sections included in a selected route into a single complete loop including a connection to said wayside speed command signal source and parallel to the established route to transmit speed command signals to a train traversing the interlocking.

Claim 7

In a railroad interlocking controllable for establishing a selected one of at least two different routes for an approaching train prior to its arrival, the interlocking rails forming a plurality of distinct track sections each extending between two predetermined points within the interlocking limits, each train traversing said interlocking being provided with speed signaling apparatus controlled by speed command signals normally inductively received through the rails from a wayside source of such signals, a speed command signaling arrangement for said interlocking comprising in combination, a. circuit control means responsive to route selection for establishing predetermined circuit connections corresponding to the selected route, b. a signal transmission wire positioned adjacent to and extending the length of each rail in each distinct track section, c. said circuit control means connected for connecting the signal transmission wires adjacent the rails in adjoining sections included in a selected route into a single complete loop including a connection to said wayside speed command signal source and parallel to the established route to transmit speed command signals to a train traversing the interlocking.

Claim 8

A speed command signaling arrangement as defined in claim 5 in which said circuit control means comprise a switch circuit controller for each track switch, each circuit controller having a plurality of contacts selectively closed in accordance with the switch position establishing a selected route to connect together the corresponding transmission wires of the adjoining track sections included in the established route.

Claim 9

A speed command signaling arrangement as defined in claim 6, further including, a. a cross connection between said transmission wires adjacent the opposite rails at selected ones of the outer limits of said interlocking which may at times become an end of an established route, b. a connection to said wayside signal source from said transmission wires adjacent the rails at each other outer limit which may at times becomE the other end of an established route, c. each completed transmission loop formed by connecting transmission wires of adjoining sections also including a cross connection, a connection to said wayside signal source, and the several switch circuit controller contacts closed in accordance with the corresponding established route.