Patent GB-191126794-A (GB)
Title: Improvements in Feed Apparatus for Linoleum Presses.
Inventor: THOMPSON WILLIAM PHILLIPS
IPC: D06N3/00
Filed: 1911-11-30
Granted: 1912-11-21
Abstract: 26,794. Thompson, W. P., [Bremer Linoleumwerke Delmenhorst]. Nov. 30. Feeding webs. - In linoleum presses, the supporting - fabric with the loose linoleum mass in pattern form is fed by an electric motor, which is switched in circuit by a time switch through an automatic starter and cut out by a switch operated by the motor and adjustable by means of a change-speed gear. The feed-roll i for the conveyer belt i<1> is driven through gearing by a motor c controlled by an automatic starter b. The operating - magnet of the starter is energized by the closure of a time switch of known construction. In the form shown in Fig. 4, clockwork mechanism is operated by a spring a' connected to a lever a<2>. The end of the lever a<2> is toothed and gears with an end of a bell-crank lever a<5>, the other end of which carries the armature a<6> of an electro-magnet a'. When the electro-magnet is energized, its armature is attracted, and the spring a<1> is tensioned. A pawl a<8> engages the ratchet-wheel a<3>, and the contacts b<1>, b<2> are separated while the clock-work mechanism operates under the restraint of a pendulum with an adjustable bob a<4>. When the clock-work has almost run down, the contacts b<1>, b<2> are closed to complete the actuating circuit of the starter b. The motor drives the feed-roll i, and a wheel k on the shaft of the roll i drives a change-speed gear, consisting of two conical rollers with an adjustable leather band between, to which is attached a switch p. The switch has a locking-device so arranged that it operates after its spindle has made one revolution. The switch makes a temporary contact to close the circuit of the electro-magnet a<7>, which winds up the clock-work and separates the contacts b<1>, b<2>, thereby stopping the motor. The circuit of the braking-magnet q is broken, and the band brake r is put on. When the clock-work runs down, the actions are repeated, and the fabric with the loose linoleum mass is fed into the press x. Push-buttons may be arranged to interrupt the circuit of the motor to delay starting. In a modification, the starter is connected to a switch consisting of a pivoted arm 2 under the influence of electro-magnets 3, 4, Fig. 8, which is provided with two pairs of contacts 5', 5, which engage fixed contacts on the base. In the circuit between the switch and the actuating-coil of the starter are placed weighted contacts 17, 18, which are normally open. These contacts are operated by stops x<1>, y<1> on the press stamp x and frame y. In place of the switch p to operate at the end of the travel, the switch shown in Fig. 7 is used. It comprises three drums 20, 21, 22, each wiped by two contact-springs. When the switch is in its left-hand position, the current energizes the coil of the starter as soon as the switch 19 is closed. The motor c drives the feed-rolls i until the required length of linoleum is through the press, whereupon the driver closes the contacts 19 and closes the circuit of the electro-magnet 4, thereby moving the switch lever to its righthand position. This causes the motor c to stop; but the auxiliary motor z drives the shaft 31, the speed of which is diminished after starting by the insertion of an adjustable resistance w. The drum 20 is locked by the projection p<2> and the bolt p'. The spring p<5> is therefore stressed until the arm p<3> withdraws the bolt p<1>, thus allowing the drum to make one revolution. When the driver has closed the switch 19, and thereby caused the operation of the switch arm 2, it is placed back a distance corresponding to the next length of the feed.