Patent GB-440401-A (GB)
Title: An improved mechanism for inserting paper between the layers of wire in coils for electrical purposes
IPC: H01F41/06
Filed: 1934-03-21
Abstract: 440,401. Cutting paper &c. webs. GEDDES, J. W., 10, Bodley Road, Malden, Surrey. March 21, 1934, No. 8868. [Class 31 (i)] [See also Groups IX and XVI] In a machine for winding wire on to bobbins for electrical purposes and inserting layers of paper &c. between the layers of wire, the paper is drawn from a roll by a reciprocating member through a double comb guide, the member gripping the paper between the teeth of the guide and delivering it to the coil or coils being wound; the paper is automatically severed during the travel of the reciprocating member between the guide and the delivery point. As shown the paperfeeding member comprises a reciprocating carriage b, Fig. 3, supported by wheels b<1> on an inclined track d<3> and the paper a<1> is drawn from a roll a between the double comb guide a<2>, Fig. 1, by a cross bar b<3> on the carriage co-operating with pad d<1>, Fig. 7, on another cross bar d. The bar b<3> is formed with projections corresponding in position with the spaces between the teeth of the guide a2 and a pad d<1 >is positioned immediately beneath each projection so that, when the carriage is at the end of its downward travel on the track d<3>, the projections pass between the teeth of the upper comb of the guide a<2> and the bar d is rocked to move the pads d<1> into contact with the paper and grip it against the projections. The carriage then moves up the track to convey the leading edge of the paper, to the bite of the coil or coils being wound on the mandrel j<1>, the edge being supported on a plate el on a wheel e at the front of the carriage ; the wheel runs on a cam plate as the carriage moves up to bring the plate under the paper while one or more soft brushes e<3>, actuated from a cam guide fall on to the paper and hold it upon the plate. When the carriage reaches the end of its upward travel, the bar d is rocked to release the paper and the wheel e runs down on inclined plate f to incline the plate e<1> and direct the paper tangentially between the coil or coils being wound ; the plate f carries a half-nut p<8> gearing with a screwed shaft p' driven by a flexible shaft p<3> so that the plate f is moved forwards as the winding proceeds to maintain the direction of the paper tangential to the surface of the growing coil or coils. The bar d is carried from a pair of toggle levers k, k<1> connected to a bracket k<3> pivoted on the axle of the front wheels b<1> of the carriage and the levers are thrown over at the ends of the travel of the carriage by stops to cause the pads d<1> to grip and release the paper respectively. The carriage is driven from a motor through a clutch s<6>, gear box g<3>, and quick-return crank arm g<4> having a pin g<5> engaging a slotted bar g<6> pivoted on a fixed shaft g<7> and to a rod g<8> on the carriage, the movement of which is controlled by a roller m<3>, Fig. 2, on a pivoted lever s which as the paper comes into position to be delivered to the coil or coils, is lifted by a cam surface m on the arm g<4> engaging the roller m<3> and held by a pivoted catch s<2> and, through a link s<3>, rocks a rod s<4> and frees the clutch s<6> and engages a brake s<7> to bring the mechanism to rest. The catch s<2> is actuated to free the arm s and cause restarting of the mechanism by a trigger t<8> connected by a cable t<7> to a pivoted lever t<5> which is moved by one or other of the ends of a lever t<10> which is rocked at the end of each traverse of the wire by one or other of a pair of nuts t<1>, on a screwed rod t reciprocating with the traverse means ; the nuts are set apart a distance corresponding to the traverse of the wire. The paper is severed by pivoted cutters n<1>, o<2> actuated from the cam surface m through rollers m<1>, m<2> respectively connected by links with the cutters ; the cutters are moved into positions to allow the carriage to pass between them and are so held by pivoted triggers engaging catches on the levers until the carriage approaches the upward limit of its travel when a member on the carriage catches the trigger of the cutter n<1> and a nut o<5> on a screwed rod o<6> carried by a pivoted bracket and swings the bracket so that a projection thereon engages the trigger of the cutter o<2> ; the cutters are thus freed and move up under the influence of springs to sever the paper. As the coil or coils increase in diameter the action of the cutter o<2> is delayed, to give an increasing length to the paper severed, by the movement of the nut o<5> up the rod o which is driven by the flexible shaft p<5>. The shafts p<5>, p<6> are driven from a flexible shaft p3 carrying a wheel p<2> engaging a friction wheel p<1> driven from the gear box g<3>, and by moving the wheel p<2> across the wheel p<1> the apparatus may be adjusted for coils of different diameters.