公开(公告)号：US3871024A

公开(公告)日：1975-03-11

申请号：US37053473

申请日：1973-06-15

Applicant: IIT RES INST

Inventor： CAMRAS MARVIN

IPC: G11B5/00 ,  G11B5/127 ,  H04N5/921 ,  H04N5/78 ,  G11B5/20 ,  G11B5/44

CPC classification number: H04N5/921 ,  G11B5/00 ,  G11B5/127

Abstract: A wideband transducer system including longitudinally recorded video, transversely recorded or multiplexed audio, channel shifting during blanking intervals, high frequency bias synchronized to audio carrier frequency or otherwise selected to avoid beat notes, head with plural windings switched to reduce inductance during recording and connected for wideband playback into an amplifier input with comparable or higher impedance than that of the winding.

Abstract translation: 一种宽带换能器系统，包括纵向记录的视频，横向记录或多路复用的音频，消隐间隔期间的信道移位，与音频载波频率同步的高频偏置或以其他方式选择以避免拍音，具有多个绕组的磁头，以在记录期间减少电感并连接 宽带播放成具有与绕组相当或更高阻抗的放大器输入。

公开(公告)号：US3705954A

公开(公告)日：1972-12-12

申请号：US3705954D

申请日：1970-05-04

Applicant: IIT RES INST

Inventor： CAMRAS MARVIN

IPC: H04N5/775 ,  H04N9/825 ,  H04N5/76

CPC classification number: H04N9/825 ,  H04N5/775

Abstract: MONOCHROME AND COLOR TELEVISION RECORDING AND PLAYBACK CIRCUITRY FOR COUPLING OF A VIDEO MAGNETIC TRANSDUCER HEAD WITH A STANDARD BROADCAST TELEVISION RECIEVER. HIGH FREQUENCY BIAS HAVING A FREQUENCY OR LESS THAN 4.4 MEGAHERTZ, AND A SPECIAL HEAD CONFIGURATIONS OF SHEET MAGNETIC MATERIAL HAVING SUBSTANTIALLY INCREASED CROSS SECTIONAL PERIMETER FOR EDDY CURRENTS ACCOMODATING BIAS FREQUENCIES UP TO TEN MEGAHERTZ.

公开(公告)号：US3686467A

公开(公告)日：1972-08-22

申请号：US3686467D

申请日：1969-08-08

Applicant: IIT RES INST

Inventor： CAMRAS MARVIN

IPC: G11B5/127 ,  G11B5/23 ,  G11B5/245 ,  G11B5/00

CPC classification number: G11B5/127 ,  G11B5/23 ,  G11B5/2452

Abstract: A magnetic transducer head having a coupling gap of controllable effective longitudinal dimension. In one embodiment a gap spacer of magnetic material is energized by bias current and/or signal current during recording while being deenergized during playback to provide a larger coupling gap for recording than for playback. Recording gap size may be controlled dynamically, or a very high frequency bias current such as 100 mhz may be supplied to the magnetic gap spacer. A magnetic head may have a zero gap dimension when the magnetic gap spacer is deenergized to prevent any substantial residual external field. An electro-magnetic transducer head with the electric circuit portion including a path through the electrically conductive magnetic corepiece at the transducer gap, thus concentrating the gap field and mininizing core losses at very high bias or signal frequencies.

Abstract translation: 一种具有可控有效纵向尺寸的耦合间隙的磁换能器头。 在一个实施例中，磁性材料的间隔物在记录期间被偏置电流和/或信号电流激励，同时在重放期间被断电，以提供用于记录的更大的耦合间隙而不是重放。 可以动态地控制记录间隙尺寸，或者可以向磁隙间隔件提供诸如100mhz的非常高的频率偏置电流。 当磁隙间隔物被断电时，磁头可以具有零间隙尺寸，以防止任何实质上的残余外部场。 具有电路部分的电磁换能器头包括在换能器间隙处穿过导电磁芯的路径，从而集中间隙场并且以非常高的偏置或信号频率使铁芯损耗最小化。

公开(公告)号：US3591729A

公开(公告)日：1971-07-06

申请号：US3591729D

申请日：1966-03-23

Applicant: IIT RES INST

Inventor： CAMRAS MARVIN

IPC: G11B5/02 ,  G11B5/03 ,  G11B5/127 ,  G11B5/187 ,  G11B5/465 ,  G11B5/55 ,  G11B15/18 ,  H03F1/50 ,  H04N5/775 ,  H04N5/782 ,  G11B5/10 ,  G11B5/12

CPC classification number: H03F1/50 ,  G11B5/02 ,  G11B5/03 ,  G11B5/127 ,  G11B5/187 ,  G11B5/465 ,  G11B5/5504 ,  G11B15/18 ,  H04N5/775 ,  H04N5/782

Abstract: A magnetic head is shown having auxiliary core material in a substantially unstressed condition with very low direct current coercivity and located within the working magnetic core for diverting magnetic flux due to residual magnetization of the main core of the head away from the record medium path. Crossfield magnetic heads, offset pole magnetic heads, and composite core magnetic heads with windings for different frequency ranges are also disclosed.

公开(公告)号：US3588334A

公开(公告)日：1971-06-28

申请号：US3588334D

申请日：1967-04-03

Applicant: IIT RES INST

Inventor： CAMRAS MARVIN

IPC: H04N5/782 ,  H04N5/783

CPC classification number: H04N5/783 ,  H04N5/782

Abstract: A MAGNETIC TRANSDUCER SYSTEM AND METHOD FOR VARYING THE SPEED OF ACTION OF A RECORDED VIDEO SIGNAL INCLUDING A VIDEO CAMERA WITH A SELECTABLE SCAN RATE, A MAGNETIC RECORDER FOR RECORDING THE VIDEO SIGNALS FROM THE CAMERA AT A GIVEN SPEED, A VARIABLE SPEED DRIVE FOR THE RECORDER FOR PLAYBACK OF THE RECORDED VIDEO SIGNALS AT A SECOND SPEED SUCH THAT THE PLAYBACK SCAN RATES ARE THE STANDARD RATES FOR DISPLAY BY A COMMERCIAL TELEVISION RECEIVER. OR INTEGRAL MULTIPLES OR SUBMULTIPLES OF SUCH STANDARD RATES. A ROTATABLE HEAD RECORDER OR PLAYBACK DEVICE WITH STATIONARY SCANNING DURING THE OTHER OF PLAYBACK OR RECORDING MAY BE EMPLOYED.

公开(公告)号：US3534966A

公开(公告)日：1970-10-20

申请号：US3534966D

申请日：1967-12-11

Applicant: IIT RES INST

Inventor： CAMRAS MARVIN

IPC: G11B5/54 ,  G11B15/30 ,  G11B5/48

CPC classification number: G11B5/54 ,  G11B15/30

公开(公告)号：US3513265A

公开(公告)日：1970-05-19

申请号：US3513265D

申请日：1964-10-29

Applicant: IIT RES INST

Inventor： CAMRAS MARVIN

IPC: H04N5/7822 ,  G01D15/12 ,  G11B5/20

CPC classification number: H04N5/7822

公开(公告)号：US3506780A

公开(公告)日：1970-04-14

申请号：US3506780D

申请日：1964-08-31

Applicant: IIT RES INST

Inventor： CAMRAS MARVIN

IPC: H04N5/92 ,  H04N5/921 ,  H04N7/084 ,  H04N5/78 ,  H04N5/62 ,  H04N7/04

CPC classification number: H04N7/084 ,  H04N5/92 ,  H04N5/921

公开(公告)号：US3874606A

公开(公告)日：1975-04-01

申请号：US28214272

申请日：1972-08-21

Applicant: IIT RES INST

Inventor： CAMRAS MARVIN ,  GALUS STANLEY A

IPC: G11B15/18 ,  G11B15/43 ,  G11B15/665 ,  G11B15/70 ,  G11B23/07 ,  B65H17/48

CPC classification number: G11B15/1891 ,  G11B15/43 ,  G11B15/665 ,  G11B23/07

Abstract: In the illustrated embodiment a video cartridge contains an endless loop record tape with a multiplicity of channels, and a pair of pivotal guide arms for holding a length of tape in a taut condition to facilitate loading of the cartridge with the tape threaded between a capstan drive assembly and a transducer head. The downward movement of the cartridge into the operative position serves to retract the tape guides clear of the operating tape path. A tape tension arm is provided along the tape path in the cartridge and is so arranged as to apply tension to the tape as the cartridge is unloaded from the transducing machine. The tape reel in the cartridge is suspended on a bearing ball so as to provide very low resistance to rotation.

Abstract translation: 在所示实施例中，视频盒式磁带包含具有多个通道的无限循环记录带，以及一对枢转引导臂，用于在拉紧状态下​​保持一段长度的带，以便于将带与磁带驱动器 组件和换能器头。 盒的向下移动到操作位置用于将带引导件缩回到操作带路径之外。 磁带张紧臂沿着盒中的磁带路径设置，并且被布置成当磁带从换能器卸载时向磁带施加张力。 盒中的磁带卷轴悬挂在轴承球上，以便提供非常低的旋转阻力。

公开(公告)号：US3683107A

公开(公告)日：1972-08-08

申请号：US3683107D

申请日：1970-08-10

Applicant: IIT RES INST

Inventor： CAMRAS MARVIN

IPC: G11B5/55 ,  G11B5/56 ,  G11B15/60 ,  H04N5/775 ,  H04N9/80 ,  H04N5/78

CPC classification number: H04N5/775 ,  G11B5/5504 ,  G11B5/56 ,  G11B15/602 ,  H04N9/80

Abstract: The present invention relates to the magnetic recording of televisions signals. The source of video signals is a television receiver. Adapter circuitry is disclosed which includes a detachable cable for coupling the magnetic transducing heads with the video output of the receiver for the purpose of recording the broadcast signal or the display of the reproduced video signal derived from the tape. Detachment of the cable places the television receiver in a condition to allow the display of the broadcast video instead of recording the broadcast video signal.

Abstract translation: 本发明涉及电视信号的磁记录。 视频信号源是电视接收机。 公开了适配器电路，其包括用于将磁转换头与接收机的视频输出耦合的可拆卸电缆，用于记录广播信号或从带导出的再现视频信号的显示。 电缆的分离使电视接收机处于允许广播视频的显示而不是记录广播视频信号的状态。