Patent GB-114488-A (GB)
Title: Improvements in and relating to Target Indicating or Recording Devices.
Inventor: ROSE SYDNEY ASTON MERSEY
IPC: F41J5/14
Filed: 1917-04-12
Abstract: 114,488. Rose, S. A. M. April 12, 1917. Order-type apparatus.-Consists of electrical means operated at a firing station, which produces thereat a copy of the result of firing at a target. A sheet of paper n behind the penetrable target m is drawn to the left past a vertical series of fingers o, till the hole made by the projectile lets one of the fingers drop into contact with a bar p. The travel of the sheet is copied at the firing station by the travel of a vertical rod 1, over a miniature target b and the distance of the selected finger from the edge of the sheet is proportionately measured off by the movement of a horizontal rod 2. The point of intersection d of the two rods then shows the position of the hit. A battery v supplies the following circuits, traced from the upper-shown pole; (1) comprising a terminal under the armature of an electromagnet H, the armature of an electromagnet B, and, according as this is inert or active, either a clutch s on the shaft of an electromotor q, or an electromaget E for applying a brake, (2) comprising electromagnets, D, G and a key b, (3) comprising electromagnets I, H and by division two pairs of strip contacts J and k, (4) comprising the armature of an electromagnet X, branches, ratchet-interrupters t<1>, t<2>, and (at the firing station) electromagnets h, h<2>; the second branch of the circuit includes an electromagnet y and the armature of an electromagnet A. One pole of a battery Z is wired to the bar p and each of the fingers o is wired to one of a series of studs y<4> arranged concentric to the arbor of a ratchet wheel y<2>; the other pole of the battery is wired through the electromagnet A to a radial arm y<3> for making contact with each of the studs in succession. The fingers o are also joined up, through resistances y<5>, to the armature of the electromagnet D and the circuit is completed by way of the electromagnets B and X. The electromotor q is in a relay circuit and is worm-geared to the two ratchet-interrupters t<1>, t<2>, with the clutch s intervening for the former of them. The armature of the electromagnet H is the key for the relay circuit, the armature of the electromagnet Q<1> normally holding it out of contact. After firing, circuit 2 is momentarily closed by using the key l, and the electromotor drives the two ratchet-interrupters in circuit 4, and therewith the winding roller of the sheet which is on the shaft driven through the clutch. The armature of the electromagnet X being up, the interrupter t is effective first, but when the hole in the sheet reaches a finger o, the circuit of the battery Z and electromagnets B and X is completed, whereby the current in circuit 1 is switched from clutch to brake and the other interrupter t<2> is rendered effective. The impulses received by the electromagnets h<1>, h<2> operate lever armatures g<1>, g<2> which drive ratchet-wheels e<1>, e<2> whence the rods 1, 2 are shifted by endless cords. Through the electromagnet y, the impulses also drive the ratchet-wheel y<2> till the radial arm y<3> touches the stud y<4> which is associated with the finger selected by the sheet 1 whereupon an electromagnet A attracts its armature to break the circuit 4. Circuit 2 is again completed momentarily by using the starting key l, and the electromagnet D opens the circuit through B and X so that the clutch again acts to wind the paper clear of the fingers, after which circuit 3 is closed at k by using button i to stop the electromotor, free the clutch and apply the brake. The armature of the electromagnet D and the button i respectively disengage the driving pawl y<1>, of the ratchet wheel y<2>, and the driving pawls g<1> g<2> of the ratchet wheels e<1> e<2> so that coiled springs reverse them. In the absence of any perforation of the sheet by a shot the circuit of the two electromagnets H and I, may be closed by causing the arm y<3> to close the circuit through the contacts J.