Patent GB-104176-A (GB)
Title: Improvements in or relating to Detectors or Relays.
IPC: H01H47/00
Filed: 1915-12-31
Abstract: 104,176. Sprague Safety Control & Signal Corporation, (Assignees of Sprague, F. J.). Dec. 31, 1914, [Convention date]. Automatic cir.. c u i t - breakers etc.; electro-magnetic switches.- The operating or retaining winding of a relay is shunted by a circuit containing one or more switches and is energized by the opening of the shunt. In a modification the relay is provided with two normally energized and opposing windings and the circuit of one of them is broken to operate and retain.the relay armature. The relay controls the circuit of the operating- magnet of the detent of a motor, which, when released, operates a switch to break the relay winding and controls the circuits of other apparatus during its movement. In the arrangement shown in Fig. 3 the winding 8 of the relay A is normally short-circuited through two contacts 10, 3. The momentary energization of a winding 11 opens the shunt circuit at the contact thereby energizing the winding 8, which attracts its armature 9 to maintain the shunt circuit open at the contact 10. In the modification shown in Fig. 4, the windings 8, 11 are placed on the same core. When a switch 13 in the circuit of the winding 11 is operated to close the circuit momentarily at the switch 13 and open it at a switch 12, the armature 6 is operated to remove the short circuit about the winding 8. In the modification shown in Fig. 7, the windings 8, 11 are placed on separate cores, the former being energized from the winding 14 of a generator 14, 15 to attract the common armature 6, which breaks the shunt circuit about the winding 8 at the contact 3. In a further modification the cores of the windings 8, 11 act on opposite sides of the pivot of the armature 6. In a modification shown in Fig. 16, the armatures 6, 9 of the windings 11, 8 in their unattracted positions close the shunt circuit about the winding 8 at contacts 3, 10. When the winding 11 is energized, the armature 6 is attracted to break the shunt circuit about the winding 8 at the contact 3, whereupon the winding 8 is energized to maintain the shunt circuit open by separating the armature 9 and the contact 10. The relay 8 is provided with an additional contact 17, which, when energized by the armature 9, closes the circuit of a magnet 16. In the modification shown in Fig. 19, the shunt circuit about the winding 8 contains a winding 7 which is arranged to oppose the action of the winding 8. When the circuit of the winding 7 is broken at the contact 3, the armature 9 is attracted to break the shunt circuit at the contact 10. The armature 9, in its attracted position, may close the circuit of an operating-winding, such as the winding 16, Fig. 16. In the arrangement shown in Fig. 25, the armature 18 of the magnet 16 is arranged to release the detent 23 of a train of wheels 22, through which a commutator switch 21 is driven. The first movement of the switch 21 breaks the circuit of the winding 8 at the contacts 19, 20, thereby de-energizing the magnet 16; while the further movement of the switch 21 controls other circuits through the contacts 24, 25 and 26. Specification 101,348, [Class 105, Railway signals &c.], which describes a train-control system, is referred to.