-
公开(公告)号：CA1026459A
公开(公告)日：1978-02-14
申请号：CA176599
申请日：1973-07-17
Applicant: IIT RES INST
Inventor： CAMRAS MARVIN , GALUS STANLEY A
IPC: G11B15/18 , G11B15/43 , G11B15/665 , G11B15/70 , 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.
-
公开(公告)号：DE2337840A1
公开(公告)日：1974-03-21
申请号：DE2337840
申请日：1973-07-25
Applicant: IIT RES INST
Inventor： GALUS STANLEY A , CAMRAS MARVIN
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.
-
Patent Agency Ranking
公开(公告)号：DE2331164A1
公开(公告)日：1974-03-21
申请号：DE2331164
申请日：1973-06-19
Applicant: IIT RES INST
Inventor： CAMRAS MARVIN
IPC: G11B15/18 , G11B15/43 , G11B15/665 , G11B15/675 , G11B23/07
-
-
公开(公告)号：GB1201939A
公开(公告)日：1970-08-12
申请号：GB4922967
申请日：1967-10-30
Applicant: IIT RES INST
Inventor： CAMRAS MARVIN
Abstract: 1,201,939. Making transducers. IIT RESEARCH INSTITUTE. 30 Oct., 1967, No. 49229/67. Heading B3A. [Also in Division G5] A magnetic transducer comprises semicircular core parts 17, 18 located in recesses in two mating conductive blocks 35, 36 having cavities defining an annular winding space containing a winding 47 linking the core; the gap 12, block interface, and winding space median plane all being coplanar. As shown, channel-section, semicircular alloy C-cores 17, 18 containing lower coercivity laminations are located in recesses 38, 39 in Cu, Al or Ag blocks 35, 36 integral with, or soldered or welded at 143 to mounting blocks 40, 41 of copper, brass or bronze, the blocks containing machined or pressed annular cavities 45, 46 receiving windings 47, 48. A gap spacer and possibly a copper wedge 32 are positioned at the gap 12 and the core halves clamped together by screws 67 within a magnetic casing 60. Prominent portions of the blocks 35, 36 are removed and the remainder ground to a crowned configuration either flush with, or slightly above, the casing. During recording, the winding 47 may be terminated by a resistor while the bias and a video signal are applied to winding 48, or winding 48 may be short-circuited to obtain a low impedance and high resonant frequency. During playback, the windings 47, 48 are either connected in series-opposition at frequencies below the resonant frequency of winding 47 to give greater signal output between the resonant frequencies of the two windings, or in seriesaiding so as to provide bass-boost below the resonant frequency of winding 47. A multi-channel head (Fig. 4, not shown) consisting of four transducers each comprising two pairs of C-core assemblies (89, 90) located in a common (94) or respective blocks, themselves fixed dovetail-fashion into larger blocks, is constructed as above and mounted for lateral shifting to handle eight-track lubricated tapes.
-
公开(公告)号：GB1106782A
公开(公告)日：1968-03-20
申请号：GB1298865
申请日：1965-03-26
Applicant: IIT RES INST
Inventor： CAMRAS MARVIN
Abstract: 1,106,782. Recording and playback. IIT RESEARCH INSTITUTE. 26 March, 1965, No. 12988/63. Heading G5R. The output winding of a playback head is connected to a compensating circuit which tends to equalize the phase shifts produced in signal components of frequencies respectively below and above the resonance frequency of the winding. As shown, a magnetic core 13 carries two windings 27, 28 having different numbers of turns and different resonance frequencies. One winding 28 is used alone for recording, but the two windings are connected in series for playback. A magnetic head 10 comprises the magnetic core 13, having a first non-magnetic gap 23 therein, and a second core 14 having a pair of poles 14a, 14b confronting opposite sides of a part of the first core 13 to define second and third non-magnetic gaps 20, 21 between this part of the first core and the respective poles of the second core. An erase or bias field is applied by means of conductors 35, 45, Figs. 1 and 2, or 57, 57 1 , Fig. 6, located in grooves in the first core 13. The head 10 is energized to produce a composite video and synchronizing track 66 between two audio tracks 64, 65, Fig. 4, on a tape 11 which may accommodate a plurality of such combined tracks by virtue of the provision of manual or automatic means for reversing the direction of movement of the tape and stepping the head laterally (Figs. 14, 14A, 14B, 15, not shown). A grooved tape-supporting surface extends on either side of the active part of the head so that during recording or playback the ridges 879, Fig. 6, of this surface engage the tape only between the record tracks. The circuitry (Figs. 7, 10 or 11, and 12 or 13) includes means for detecting and counteracting the effects of flutter and drift. The high-frequency response of the head may be increased by the provision of a ferrite shunt 47, Fig. 1.
-
公开(公告)号：GB1076983A
公开(公告)日：1967-07-26
申请号：GB3133664
申请日：1964-08-04
Applicant: IIT RES INST
Inventor： CAMRAS MARVIN
IPC: G11B15/66
Abstract: 1,076,983. Automatic tape threading. IIT RESEARCH INSTITUTE. Aug. 4, 1964, No. 31336/64. Heading G5R. Apparatus for adapting a conventional tape recorder for automatic threading wherein the step/play/record switch of the recorder is modified to provide a " threading " position in which means (not shown) are provided for tensioning a belt driving the tape take up spool 50, for disconnecting the normal tape drive and for rotating a control arm 73 of the threading apparatus 40, shown in bottom plan, which is fitted over the tape transport area of the recorder front panel. The base-plate of the apparatus is apertured to allow the tape spools to be fitted to the recorder and these are provided with toothed hubs 50b, 60b, which engage apertured leaders 61, 62, provided on the ends of the tape. The outer rims of the spools are provided with inwardly directed shoulders which form bearing surfaces for the rollers 85, 86 and which are spaced apart a distance which is greater than the tape width but less than the leader width. Rotation of arm 73 rotates member 74 about a pivot 75 to the position shown whereby rollers 85, 86 are spring urged against the spool rims and the supply spool 60 is driven from the take up spool, arm 111 is moved about pivot 119 by roller 110 to form guide 125a for part of the tape path and to engage spring 74b to lock a member 74 in its counterclockwise position shown, tape guide 340 is lowered into the normal tape path past the recording heads etc., arm 270 is rotated counterclockwise to bear on the tape leader in the supply spool 60 and stripper 210a is advanced to the right to strip the leader from the supply spool. The tape leader is now advanced from the supply spool 60 via guides 230a, 340 and 125a in which it is slightly twisted so that it passes between the shoulders of the take up spool and is then urged by spring arm 135 into engagement with the teeth on the hub of the take up spool. When the tape has engaged on the spool the increased tension in the tape rotates a toggle member 120 which releases the spring lock and member 74 is rotated clockwise back to its initial position taking the threading mechanism out of operation.
-
-
-
-
-
-
Search Results
57
records
(took 0.02 seconds)
