GB684558A - Improvements in weft stop motion devices for looms for weaving tufted pile fabrics - Google Patents

Abstract

684,558. Stop-motions for Axminster looms. PLATT BROS. & CO.. Ltd. March 17. 1950 [March 17, 1949], No. 7254/49. Class 142(i) Weft stop motion, Fig. 2. Each weft thread runs through and supports an eye 20 on an arm 15; if the thread breaks the arm falls on to an insulated detector plate 18, thereby closing the stop motion circuit described below. A timing switch, operated either by a rotating cam or by the actuating lever of the weft inserting needles, ensures that the loom stops with the needles out of the shed. Stop motion circuit, Figs. 5 and 6. Closing of the circuit at E by the detector, and at J by the timing switch, energizes a relay D which remains energized through a holding contact D<SP>1</SP>. Another contact D<SP>2</SP> energizes a relay C which opens a contact C<SP>1</SP> to trip the no-volt release on the motor starter; at the same time, contacts F<SP>1</SP> open to de-energize the relay C, and contacts F<SP>3</SP> close to light a signal lamp H. In a wide loom, the motor is braked by injecting direct current; in a narrow loom, opening of the contact C<SP>1</SP> also de-energizes a solenoid 36, Fig. 6, to allow a spring 44 to knock the starting handle 33 out of its retaining notch, thereby declutching the loom from the motor and applying a brake. The motor can be switched on and the loom inched, but the loom cannot be run normally until the fault has been remedied and a reset button G pressed.