Patent GB-190627204-A (GB)
Title: A New or Improved Electro-magnetically Operated Device for Circuit Closing, Indicating, Transmitting Power and other purposes.
Inventor: ANDERS GEORGE LEE
Filed: 1906-11-29
Granted: 1907-11-29
Abstract: 27,204. Anders, G. L., and Thomson, A. T. M. Nov. 29. Signals, electric-bell and indicator or visible.- Deflexions of a body to given points are produced by means of two electro-magnets, for the purpose of closing electric circuits, indicating, transmitting power, and other purposes. The method of operating is first to energize both magnets and thus move the body in the direction of the resultant force, and next to de-energize one of the magnets and allow the body to take up another position, its movement if desired being arrested at intermediate points, where local circuits may be completed, or indications given by numerals or bells, or various mechanical operations be produced. Figs. II and V show one form of device for producing deflexions of a pin 5 to three contact positions 17. The pin, which carries a contactwheel 16 at the end, is constrained by springs to occupy normally the central upright position shown. Each electro-magnet 10 has a central core 11 and a tubular sheath 13 which is saw-cut as at 14, Fig. IV, and has its ends bent out to form wings 15 to which the armature 9 is pivoted. The armature in its attracted position fills up the end of the tube 13. When both electro-magnets 10 are excited, the vertical tails 8 of the pivoted armature 9 act upon a bearing body 7 mounted on the rod and deflect it to the central contact 17. When one of the magnets is subsequently de-energized, the rod 5 is brought against one of the outside contacts. To give a greater number of contact positions, several pairs of electro-magnets may be employed. Fig. VI shows a form of fixed contact designed to lock the rod in whatever position it assumes. It may be unlocked by a longitudinal movement of the rod effected as described in the subsequent modifications or by a special deflecting- magnet. Fig. VII shows a modification in which several sets of fixed contacts, each set occupying a separate plane or " stage," can be reached by deflexions of one contact-rod 5. In this case the bearing body 7, upon which the armatures 8 of the deflecting-magnets 10 act, is mounted upon a sleeve 20 within which the rod 5 carrying its contact-wheel 16 is longitudinally movable by the action of a " stage-shifting magnet " 23, a pawl and ratchet 24, 25, a pulley 27, and a connecting-cord 28. Each successive movement of the armature of the magnet 23 pulls the rod 5 one step downward, for example from the plane of contacts 29 to that of the contacts 30. At the end of a stroke, the pawl 24 is deflected to the left by the stop 34, which comes against its tail 35, and is thus left clear of the ratchet 25. An armature 32 of another electro-magnet 31 acts as an ordinary click while its magnet is not excited. If the magnet 31 is excited, the armature 32 unlocks the ratchet-wheel, and the rod 5 is released and returned to the upper position. According to the Provisional Specification, the contact-pin is attached to a frame, disk, or other body upon which the electro-magnets act. The frame may be polarized and may consist of a number of armatures linked to or merely bearing against a sleeve or collar on the pin. A permanent magnet may be used instead of an electro-magnet. Modifications in the stage-shifting arrangements are also indicated. This may be effected by one of the deflecting-magnets, or by a separate electromagnet for each stage, or by a solenoid and core of variable immersion. Specification No. 23,971, A.D. 1904, is referred to.