Electrical generator or motor structure – Non-dynamoelectric – Piezoelectric elements and devices
Patent
1975-06-23
1978-08-29
Budd, Mark O.
Electrical generator or motor structure
Non-dynamoelectric
Piezoelectric elements and devices
310326, 310330, 310332, 139371, H01L 4110
Patent
active
041106547
ABSTRACT:
A device for monitoring the travel of yarn-like structures at a textile machine comprises a cantilever member vibrating in a flexural mode when excited by a traveling yarn which is in contact with the upper or free end of said cantilever member. The lower end thereof is rigidly connected or integral with a rigid base member having the effect of a seismic mass when exposed to shock or vibration. Moreover, soft elastic material is provided to prevent transfer of such shock or vibration from the textile machine to the cantilever member. A mechano-electrical transducer element, e.g., a piezoelectric element, is comprised by or coupled with the cantilever member for generating an electrical yarn travel signal. A casing may be provided for protecting said cantilever member against ambient noise and other undesired actions acting from outside the casing.
REFERENCES:
patent: 2352311 (1944-06-01), Di Toro
patent: 2561763 (1951-07-01), Waters et al.
patent: 2578620 (1951-12-01), Wilhelm
patent: 3297889 (1967-01-01), Breskend
patent: 3377439 (1968-04-01), Rouy
patent: 3467149 (1969-09-01), Dosch et al.
patent: 3519800 (1970-07-01), Shill
Budd Mark O.
Gebr. Loepfe AG
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