Systems for transmitting information between a railway track and moving train

Claim 1

A system for transmitting binary coded data from a wayside data transmitting location to a moving vehicle comprising: A. a plurality of spaced, horizontally disposed, discrete conductor loops at said location and positioned sequentially in the direction of vehicle movement along the wayside and with the vertical axis of at least one conductor loop on the opposite side of a line extending parallel to the direction of movement of the vehicle to at least one other conductor loop, B. an alternating current source for energizing each said conductor loop producing a magnetic field above each loop which has a vertical component which is either of a first relative phase or a second opposite relative phase dependent upon the direction of current flow in said loop and which has a first horizontal component to one side of said axis of a first relative phase and a second horizontal component to the other side of said axis of a second opposite relative phase, C. detector means disposed on the vehicle to move along said line and including, i. first aerial means oriented to be inductively coupled with said vertical component of magnetic field of each conductor loop in sequence, ii. second aerial means adapted to be inductively coupled with the nearer of said first and second horizontal components of magnetic field of each conductor loop in sequence, iii. said first aerial means being responsive to an inductive coupling with one said conductor loop which provides a vertical magnetic field of said first phase to provide a first phase manifestation representative of a ''''one'''' bit and being responsive to an inductive coupling with one said conductor loop providing a magnetic field of said second opposite phase to provide a second phase manifestation representative of a ''''zero'''' bit, iv. said second aerial means being responsive to an inductive coupling with said first component of horizontal magnetic field of one said conductor loop to provide a third phase manifestation representative of a ''''one'''' bit and being responsive to an inductive coupling with said second component of horizontal magnetic field of one said conductor loop to provide a fourth phase manifestation representative of a ''''zero'''' bit, and D. decoder means responsive to the reception of said first, second, third and fourth phase manifestations to provide a composite signal representative of the binary coded data transmitted from the wayside to said vehicle.

Claim 2

A system for transmitting binary coded data from a wayside data transmitting location to a moving vehicle comprising: A. a plurality of spaced, horizontally disposed, discrete conductor loops at said location and positioned sequentially in the direction of vehicle movement along the wayside and with the vertical axis of at least one conductor loop on the opposite side of a line extending parallel to the direction of movement of the vehicle to at least one other conductor loop, B. an alternating current source for energizing each said conductor loop producing a magnetic field above each loop which has a vertical component which is either of a first relative phase or a second opposite relative phase dependent upon the direction of current flow in said loop and which has a first horizontal component to one side of said axis of a first relative phase and a second horizontal component to the other side of said axis of a second opposite relative phase, C. detector means disposed on the vehicle to move along said line and including, i. first aerial means oriented to be inductively coupled with said vertical component of magnetic field of each conductor loop in sequence, ii. second aerial means adapted to be inductively coupled with the nearer of said first and second horizontal components of magnetic field of each conductor loop in sequence, iii. said first aerial means being responsive to an inductive coupling with one said conductor loop which provides a vertical magnetic field of said first phase to provide a first phase manifestation representative of a ''''one'''' bit and being responsive to an inductive coupling with one said conductor loop providing a magnetic field of said second opposite phase to provide a second phase manifestation representative of a ''''zero'''' bit, iv. said second aerial means being responsive to an inductive coupling with said first component of horizontal magnetic field of one said conductor loop to provide a third phase manifestation representative of a ''''one'''' bit and being responsive to an inductive coupling with said second component of horizontal magnetic field of one said conductor loop to provide a fourth phase manifestation representative of a ''''zero'''' bit, and D. decoder means responsive to the reception of said first, second, third and fourth phase manifestations to provide a composite signal representative of the binary coded data transmitted from the wayside to said vehicle.

Claim 3

A system for transmitting binary coded data between a transmitting station and a Receiving station as said one station passes the other said station and comprising in combination: A. at least one transmitting loop at said transmitting station, B. means for energizing said transmitting loop with an alternating current to thereby produce a first component of flux in a plane normal to the plane of said transmitting loop and with a first relative phase or a second opposite relative phase dependent upon the direction of current flow in said loop and for also producing second components of flux parallel to the plane of said loop one of which lies laterally to one side of the axis of said loop and the other of which lies laterally to the other side of the axis of said loop, C. and two receiving loops at said receiving station and each passing through an inductive coupling relationship with said transmitting loops as said transmitting and receiving stations pass each other, D. one of said receiving loops being so oriented and positioned that it has inductively coupled therein a distinctive voltage signal only in response to said first component of flux and with the induced signal having a distinctive waveshape dependent upon the polarity of energization of said transmitting loop, E. a second receiving loop being so oriented and positioned that there is induced therein a distinctive voltage signal only in response to said second components of flux, F. each said transmitting loop being selectively positionable in either of two distinctive positions laterally spaced relative to a line defined by the path of relative movement of said second receiving loop as said one station passes said other station so that in one of said two positions said second receiving loop has induced therein a distinctive voltage signal in response to said one horizontal component of flux and in the other of said positions said second receiving loop has induced therein a distinctive voltage signal in response to said other horizontal component of flux, G. and decoder responsive to the distinctive voltage signals induced in said first and second receiving coils.

Claim 4

A system for transmitting binary coded data between a transmitting station and a Receiving station as said one station passes the other said station and comprising in combination: A. at least one transmitting loop at said transmitting station, B. means for energizing said transmitting loop with an alternating current to thereby produce a first component of flux in a plane normal to the plane of said transmitting loop and with a first relative phase or a second opposite relative phase dependent upon the direction of current flow in said loop and for also producing second components of flux parallel to the plane of said loop one of which lies laterally to one side of the axis of said loop and the other of which lies laterally to the other side of the axis of said loop, C. and two receiving loops at said receiving station and each passing through an inductive coupling relationship with said transmitting loops as said transmitting and receiving stations pass each other, D. one of said receiving loops being so oriented and positioned that it has inductively coupled therein a distinctive voltage signal only in response to said first component of flux and with the induced signal having a distinctive waveshape dependent upon the polarity of energization of said transmitting loop, E. a second receiving loop being so oriented and positioned that there is induced therein a distinctive voltage signal only in response to said second components of flux, F. each said transmitting loop being selectively positionable in either of two distinctive positions laterally spaced relative to a line defined by the path of relative movement of said second receiving loop as said one station passes said other station so that in one of said two positions said second receiving loop has induced therein a distinctive voltage signal in response to said one horizontal component of flux and in the other of said positions said second receiving loop has induced therein a distinctive voltage signal in response to said other horizontal component of flux, G. and decoder responsive to the distinctive voltage signals induced in said first and second receiving coils.