optical device for detecting the presence of reserve of plot and / or the breakage of weft on apparatus feeds of plot for textile machinery and equipment power supply for acquiring said plotdevice

摘要

the device includes a diode emitter (17) and a receiver (18) fototransistore arranged in correspondence to the same face of a transparent plate (19).associated with the drum (11) of the apparatus (10) and which can receive the coils of the reserve of plot (rf).the emitter (17) sends on the transparent plate (19) with a beam of rays (r1) tilted to a predetermined angle of incidence (?) and the receiver (18) receives a bundle of rays (r2) emerging from thea transparent plate (19) and tilt with respect to the plate at an angle of reflection (?) ,different from that of incidence (?) produced by multiple reflection means (20) arranged in correspondence to the other face of the transparent plate (19).the incident rays (r1) and / or emerging (r2) is intercepted by a coil (sp) of the reserve yarn (rf) when the coil reaches the plate (19).to obscure the receiver (18) which emits a corresponding signal (s) of the presence of the spire. (fig. 3).