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公开(公告)号：US3615047A
公开(公告)日：1971-10-26
申请号：US3615047D
申请日：1969-06-30
发明人： FELDMAN DAVID , SIBILIA JOHN T
IPC分类号： B28D5/00 , H01L21/00 , H01L21/302 , H01L49/02 , B26F3/00
CPC分类号： H01L21/67092 , B28D5/0047 , H01L21/302 , H01L49/02 , Y10T225/10 , Y10T225/12 , Y10T225/30 , Y10T225/325
摘要： APPARATUS FOR SEPARATING A SCRIBED PLATE OF BRITTLE MATERIAL UTILIZES TWO FLEXIBLE MEMBRANES BETWEEN WHICH THE PLATE IS VACUUM CLAMPED. A UNIFORM FORCE SUCH AS FLUID PRESSURE FORCES THE MEMBRANES INTO A DIE WHICH CAUSES THE MEMBRANES TO TRANSMIT UNIAXIAL STRESSES TO THE PLATE TO SEPARATE IT ALONG SCRIBE LINES. SEPARATION ALONG A SET OF SCRIBE LINES ORTHOGONAL TO THE FIRST SET IS ACHIEVED BY USING A DIE WHICH IS ORTHOGONAL TO THE FIRST DIE.
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公开(公告)号：US3518571A
公开(公告)日：1970-06-30
申请号：US3518571D
申请日：1968-07-08
发明人： FELDMAN DAVID , RAO TADIKONDA N
CPC分类号： H03B5/26 , H03B5/24 , H03B2201/0283 , H04M1/50
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公开(公告)号：US3602800A
公开(公告)日：1971-08-31
申请号：US3602800D
申请日：1969-05-21
CPC分类号： H04M3/005
摘要： A coupler for attaching customer-owned equipment to the telephone network permits any customer signal below a prescribed signal level to pass without distortion or attenuation but linearly attenuates signals exceeding the prescribed level. The coupler measures the mean power of the customer''s signal and utilizes the results to switch the proper attenuating load across the line. The switch circuit of the coupler has a hysteresis characteristic to prevent distortion of the customer''s signal by repeated switching between different alternating modes when the customer''s signal has slight variations about the prescribed threshold level.
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公开(公告)号：US3460026A
公开(公告)日：1969-08-05
申请号：US3460026D
申请日：1967-05-08
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