![a turntable at rotational speed 33 rpm a turntable at rotational speed 33 rpm](https://images-na.ssl-images-amazon.com/images/I/71f%2B3AcrpGL._AC_SL1500_.jpg)
It has been also discovered by the inventors that the twisting of the panel board has a same effect as the background noise of the phonograph record. When the support member is fixed to a panel board and floated by cushions from the ground, the panel board vibrates torsionally about the axis of the turntable. There is no twisting vibration in the support member. When the support member is fixed to the ground, the support member cannot move.
![a turntable at rotational speed 33 rpm a turntable at rotational speed 33 rpm](https://imgus-vip.tongtool.com/s/hfhhponhfjhjhehpflkkoqkqqmojohlpohlgAGxa.jpg)
H02P- CONTROL OR REGULATION OF ELECTRIC MOTORS, ELECTRIC GENERATORS OR DYNAMO-ELECTRIC CONVERTERS CONTROLLING TRANSFORMERS, REACTORS OR CHOKE COILS.discharge tubes or semiconductor devices with position sensing devices using detecting coils using the machine windings as detecting coil H02K29/12- Motors or generators having non-mechanical commutating devices, e.g.discharge tubes or semiconductor devices with position sensing devices H02K29/06- Motors or generators having non-mechanical commutating devices, e.g.H02K29/00- Motors or generators having non-mechanical commutating devices, e.g.H02- GENERATION CONVERSION OR DISTRIBUTION OF ELECTRIC POWER.239000000696 magnetic material Substances 0.000 description 1.238000006243 chemical reaction Methods 0.000 description 1.230000005540 biological transmission Effects 0.000 description 2.229910000831 Steel Inorganic materials 0.000 description 2.238000005859 coupling reaction Methods 0.000 description 6.230000001105 regulatory Effects 0.000 claims description 9.230000001276 controlling effect Effects 0.000 claims description 14.230000000875 corresponding Effects 0.000 claims description 16.Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.) Filing date Publication date Priority to JP5128468 priority Critical Priority to JP7408168 priority Application filed by Matsushita Electric Industrial Co Ltd filed Critical Matsushita Electric Industrial Co Ltd Application granted granted Critical Publication of US3683248A publication Critical patent/US3683248A/en Anticipated expiration legal-status Critical Status Expired - Lifetime legal-status Critical Current Links Original Assignee Matsushita Electric Industrial Co Ltd Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.) Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.) Expired - Lifetime Application number US127494A Inventor Kazutsugu Kobayashi Yoshiaki Igarashi Hisayuki Matsumoto Current Assignee (The listed assignees may be inaccurate.
#A turntable at rotational speed 33 rpm pdf
Google Patents Directly driven turntable apparatus for phonograph recordsÄownload PDF Info Publication number US3683248A US3683248A US127494A US3683248DA US3683248A US 3683248 A US3683248 A US 3683248A US 127494 A US127494 A US 127494A US 3683248D A US3683248D A US 3683248DA US 3683248 A US3683248 A US 3683248A Authority US United States Prior art keywords rotor stator position detecting stator windings turntable Prior art date Legal status (The legal status is an assumption and is not a legal conclusion. Google Patents US3683248A - Directly driven turntable apparatus for phonograph records US3683248A - Directly driven turntable apparatus for phonograph records