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1. 发明专利

DE3136128A1 未知
公开(公告)号：DE3136128A1
公开(公告)日：1982-04-08
申请号：DE3136128
申请日：1981-09-11
申请人： HITACHI LTD
发明人： SUGIURA KAZUMASA , MORI KINJI , IHARA HIROKAZU , KAWAI YOSHINORI
IPC分类号： H04L1/24 , H04L12/437 , H04L25/02
摘要： In a data transmission system with such a construction that a plurality of terminal units are connected to a first and a second loop transmission line for transmitting messages in a first direction and in a second direction which is opposite to said first direction, respectively, through a pair of transmission control units (the one unit being connected to said first loop transmission line with the other unit being connected to said second loop transmission line), each transmission control unit sends a check message sequentially in order to check the state of a minor loop which connects two adjacent pairs of transmission control units. This check message has a data field, in which an initial value is set at the sending time. The value of this data field is incremented by one in each transmission control unit through which the message passes to make a round through the minor loop. Each transmission control unit decides as to whether the value of the data field of the received check message has a prescribed value or not, thereby to discriminate if the message generated by the transmission control unit itself has made a round through the minor loop and returned. If the sent out check message is not received within a prescribed period (after sending), the transmission control unit confirms the presence of an abnormality on a minor loop with the unit as a start point, and thereafter switches its operation to use the bypass transmission line for sending usual messages.

2. 发明专利

DE3153667C2 Status-checking system for data transmission 未知
公开(公告)号：DE3153667C2
公开(公告)日：1994-09-22
申请号：DE3153667
申请日：1981-09-11
申请人： HITACHI LTD
发明人： SUGIURA KAZUMASA , MORI KINJI , IHARA HIROKAZU , KAWAI YOSHINORI
IPC分类号： H04L1/24 , H04L12/437 , H04L25/02 , H04L12/28
摘要： The system is used in networks where data stations are connected by two loop lines for bidirectional data transmission via a pair of control units - one unit connected to each loop line. Each unit sends a test message to check the state of a subloop connecting the two adjacent units. The message contains a data section that is increased by one in passing through each unit.Each unit decides whether the data section in the message has prescribed value or not and hence discovers whether the message generated by the unit itself has travelled the subloop and returned.The unit indicates a fault in a subloop if the message is not received within a given time. The unit then switches in a bypass line. (66pp)

3. 发明专利

DE1221290B 未知
公开(公告)号：DE1221290B
公开(公告)日：1966-07-21
申请号：DEH0050937
申请日：1963-11-25
申请人： HITACHI LTD
发明人： KAWAI YOSHINORI , KIWAKI HISAKATSU , SATO HIROSHI
IPC分类号： H02M7/515 , H02M7/516 , H03F9/00 , H03F9/04
摘要： 1,070,576. Magnetic amplifiers; transistor amplifier and oscillator circuits. HITACHI Ltd. Nov. 20, 1963 [Nov. 24, 1962], No. 45899/63. Headings H3B and H3T. The output from a magnetic amplifier to a load is obtained from a D.C. power source. As shown in Fig. 1 a D.C. electrical source Eo is applied to output windings NL1, NL2 1 and NL2, NL1 1 through a load RL and a pair of silicon controlled rectifiers SCR1, SCR2 respectively, the output windings being mounted on two saturable cores m1, m2 together with control windings Nc connected to a D.C. control or input voltage source Ec. If rectifier SCR1 is conducting and SCR2 non-conducting current flows through windings NL1 and NL2 1 to the load RL and capacitor C is charged over circuit SCR1-C-NL2-NL1 1 until voltage Eo is applied across windings NL2 and NL1 1 so that voltages are induced in the windings in the direction shown by the arrows. The induced voltage in gate winding NG 1 causes capacitor C 1 to be charged through diode D1 1 and the gate cathode of rectifier SCR1 so keeping this rectifier conducting and the induced voltage in gate winding NG2 causes capacitor C2 to be charged over diode D2 and rectifier SCR2 to be maintained cut off. When core m 2 saturates capacitor C2 discharges through diode D2 1 and the gate cathode of rectifier SCR2 so as to render it conductive. Capacitor C is thus discharged through SCR1 and SCR2 resulting in SCR1 being. non-conducting. The cycle is repeated. The SCR's may be replaced by transistors. Each iron core may be provided with a feedback winding (N#), Fig. 5 (not shown). In order to start the circuit oscillating a switch may be connected in parallel with SCR1 or a parallel combination of a resistor and capacitor may be connected in parallel with the rectifier Fig. 6 (not shown).

4. 发明专利

JPH0850353A PHOTOSENSITIVE RESIN COMPOSITION AND PRINTED CIRCUIT BOARD USING SAME 失效
公开(公告)号：JPH0850353A
公开(公告)日：1996-02-20
申请号：JP18456894
申请日：1994-08-05
申请人： HITACHI LTD , HITACHI CHEMICAL CO LTD
发明人： KATAGIRI JUNICHI , KAWAMOTO MINEO , KAWAI YOSHINORI , NEMOTO MASANORI , AKABOSHI HARUO
IPC分类号： G03F7/027 , C08G59/40 , G03F7/032 , H05K1/03 , H05K3/06 , H05K3/18 , H05K3/28 , H05K3/46
摘要： PURPOSE:To obtain a photosensitive resin compsn. developable with an aq. soln. causing no problem of safety or environmental problem and excellent in heat resistance, adhesiveness and flame retarding property and to obtain a printed circuit board using the resin compsn. CONSTITUTION:This photosensitive resin compsn. contains epoxy acrylate having a carboxyl group, epoxy resin and at least one kind of acrylate compd. as a halogen substitution product. This compsn. can be developed with a developer almost harmless to the human body and not corresponding to a dangerous article, gives a coating film excellent in resolution, heat resistance, adhesiveness and flame retarding property and can be used as a soldering resist, a plating resist or an interlaminar insulating layer for a multilayered printed circuit board.

5. 发明专利

JPH06148884A PHOTOSENSITIVE RESIN COMPOSITION, MULTILAYERED CIRCUIT BOARD USING THAT, AND ITS PRODUCTION 失效
公开(公告)号：JPH06148884A
公开(公告)日：1994-05-27
申请号：JP30203492
申请日：1992-11-12
申请人： HITACHI LTD
发明人： AMO SATORU , NISHIMURA SHIN , KAWAI YOSHINORI , MIWA TAKAO , TAKAHASHI AKIO
IPC分类号： G03F7/008 , G03F7/027 , G03F7/038 , G03F7/30 , G03F7/40 , H01L21/027 , H01L21/312 , H05K3/18
摘要： PURPOSE:To obtain a photosensitive resin compsn. excellent in heat resistance after hardened, and to provide a multilayered circuit board having fine wiring using this material. CONSTITUTION:This compsn. contains high mol.wt. copolymers having 10 or more structural units expressed by formula and a photopolymn. initiator. In formula, R1 is an org. residue containing an aromatic ring and having 6-15 carbon number, R2 is a hydrogen atom, phenyl group, or alkoxyphenyl group, R3, R4, R5 are hydrogen or alkyl groups of

6. 发明专利

JPH0574257B2 失效
公开(公告)号：JPH0574257B2
公开(公告)日：1993-10-18
申请号：JP23873588
申请日：1988-09-26
申请人： HITACHI LTD
发明人： YAMANAKA GIICHI , MORI KINJI , IHARA KOICHI , KAWAI YOSHINORI
IPC分类号： H04L12/42

7. 发明专利

JPH0246428B2 失效
公开(公告)号：JPH0246428B2
公开(公告)日：1990-10-16
申请号：JP11214081
申请日：1981-07-20
申请人： HITACHI LTD
发明人： KONDO MEGUMI , HIROTA NORIAKI , KAWAI YOSHINORI , NOMI MAKOTO
IPC分类号： B61L19/06

8. 发明专利

JPH0126213B2 失效
公开(公告)号：JPH0126213B2
公开(公告)日：1989-05-23
申请号：JP11074484
申请日：1984-06-01
申请人： HITACHI LTD
发明人： SUGIURA KAZUMASA , MORI KINJI , IHARA KOICHI , KAWAI YOSHINORI
IPC分类号： G06F13/14 , H04L12/42

9. 发明专利

JPH01125038A TRANSMISSION CONTROL METHOD IN INFORMATION TRANSMISSION SYSTEM 失效
公开(公告)号：JPH01125038A
公开(公告)日：1989-05-17
申请号：JP23873688
申请日：1988-09-26
申请人： HITACHI LTD
发明人： YAMANAKA GIICHI , MORI KINJI , IHARA KOICHI , KAWAI YOSHINORI
IPC分类号： H04L12/42
摘要： PURPOSE:To determine the transmission direction of a data without using an address of an apparatus of a receiving destination by selecting and receiving desired information based on a code which is contained in information from the first transmission line and corresponds to this information and transmitting it selectively to one of the second and the third transmission lines. CONSTITUTION:When the contents of a memory and a function code FC of a receiving data are collated and it is decided to be a test start command, an NCP (transmission controller) which has received the data generates a middle loop check data, and transmits it to a loop line L0 to which it belongs or L1. The middle loop check is executed by using both of a pair of NCPs connected to a test terminal as a test start NCP. In such a way, it is unnecessary that each NCP is addressed. Also, it is unnecessary to send the data to be transmitted, by putting an address of the NCP of a receiving destination to said data, therefore, the transmission efficiency is satisfactory, and the management for transmission is simplified.

10. 发明专利

JPS60174359A TRAIN OPERATION CONTROL SYSTEM 失效
公开(公告)号：JPS60174359A
公开(公告)日：1985-09-07
申请号：JP2875584
申请日：1984-02-20
申请人： HITACHI LTD
发明人： KAWAI YOSHINORI
IPC分类号： B61L27/00

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