Loud-speaker assembly and system,申请号US19540423933-传众专利搜索

首页产品黄页商标征信

会员服务注册登录

法人/股东/高管

发明名称	Loud-speaker assembly and system
摘要
申请公布号	US2814354(A)	申请公布日期	1957.11.26
申请号	US19540423933	申请日期	1954.04.19
申请人	AMPEX CORPORATION	发明人	BRETTELL GEORGE A.
分类号	H04R1/34;H04R5/02	主分类号	H04R1/34
代理机构		代理人
主权项
地址

您可能感兴趣的专利

Material coil holder for drawing machine - has bracket on baseplate with drums having spiral grooves thrusting coils against it

Box structure for motor vehicle body - has panels with confronting half round recesses forming bolt holes

Winding support fixing assembly - uses radial wedge to part tangential locking wedges and ensure torque transfer to stator packet

Football field with all-weather protection - has pallet elements forming cover and underground heating system with hidden outlets

High quality finish boring system - machines two workpieces clamped together with bores in line facing opposite ways

Cream or paste container - has fixed internal partition and pivoting vane on central spindle forming adjustable vol. chambers

Optical light guide shunt - using liquid crystals with molecules aligned by three pairs to electrodes

Extensive pressurised sewerage systems - use air compressors for sewage aeration and air scouring of sewers

Lock for vault or safe - has hollow solenoids and electronically controlled circuits operated externally from keyboard

Detachable hinge for motor vehicles - has two hinge profile sections which complete one another to form winged hinge

Receive circuit for space diversity radio link - uses broadband surface acoustic wave devices as delay lines

PCM communications system encoder - using modulo two adders and parallel:serial converter, for additive or multiplicative coding

Snap fastening pivot for windscreen wiper blade - is constructed with pivot end slotted to slide over tag in wiper arm

Clamping bracket for air conditioning ducts - has arms parallel to flange plane and pin at right angles

Pressing thermoplastic sheets or tubes - as they come hot from the extruder

Defrosting system for refrigerator evaporator with heater - compares reference temp. curves with evaporator temp. variation for heater switching

Paper strip tension regulating system - has brake to apply constant braking pressure, to each end of storage roll

Multistage frequency pulse divider - has shift register with NAND: gate feeding stage outputs back to input

VERFAHREN ZUR HERSTELLUNG VON WICKELDRAEHTEN DURCH EXTRUSION VON THERMOPLASTEN

DREHBARER, INSBESONDERE SCHEIBENFOERMIGER VERTEILER