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1. 发明专利

JPH02208699A DISPLAY READ-OUT ADAPTER 失效
公开(公告)号：JPH02208699A
公开(公告)日：1990-08-20
申请号：JP2769689
申请日：1989-02-08
申请人： TAMURA ELECTRIC WORKS LTD , NIPPON TELEGRAPH & TELEPHONE
发明人： MASUDA MITSUO , MORIZUMI TADAO , WATANABE TAKUMI , HATANO HAJIME , YAJIMA KOICHI , OCHI HISAMICHI
IPC分类号： G10L13/00 , G10L21/06
摘要： PURPOSE:To indicate the rest frequency of a telephone card periodically even to a person who is unable to see by comparing current read-out display data with last read-out display data and converting the current display data into a voice when they are different. CONSTITUTION:The internal memory of a CPU 2 has enough capacity to store display data value obtained by last scanning and a display data value obtained by current scanning and the CPU 2 compares both the display data values with each other. Then when the current display data value is smaller than the last display value, a control signal corresponding to the current display data value is outputted to a voice synthesis control circuit 3. Further, the voice synthesis control circuit 3 access voice data in the voice memory 4 corresponding to the inputted control signal and outputs it from a speaker 5 in the form of a voice. Consequently, even the person who is handicapped in seeing is informed of the rest frequency of the telephone card periodically.

2. 发明专利

JPS61214645A DARLINGTON CONNECTING CIRCUIT IN TRANSMITTING AMPLIFYING CIRCUIT 失效
公开(公告)号：JPS61214645A
公开(公告)日：1986-09-24
申请号：JP5426685
申请日：1985-03-20
申请人： TAMURA ELECTRIC WORKS LTD
发明人： MASUDA MITSUO , INOUE SATORU , SHINODA YOSHIO
IPC分类号： H04M1/60
摘要： PURPOSE:To maintain a high impedance by connecting a DC feedback resistance of an output of the second transistor to a connecting point of an emitter of the first transistor and an emitter resistance, and connecting a capacitor in parallel to this resistance. CONSTITUTION:An output terminal of the first stage transmitting amplifier 11 is connected to a base of the first transistor Q11, and its collector output is inputted to a base of the second transistor Q12. Also, a parallel circuit of a resistance R12 and a capacitor C11 is connected between a connecting point of an emitter of the first transistor Q11 and an emitter resistance R11, and a collector of the second transistor Q12. That is to say, a loop A passing through a resistance R13- the transistor Q11- the resistance R11, a loop B passing through the transistor Q12- the resistance R12- the resistance R11, a loop C passing through the transistor Q12- a resistance R14, and a loop D as shown by a one point chain line like an alternating current are formed. In this way, when a resistance value of the collector resistance R14 of the second transistor Q12 is enlarged, a DC resistance can be lowered in a state that an AC impedance remains maintained high.

3. 发明专利

JPS62203453A NOISE PREVENTING TYPE TRANSMITTER 失效
公开(公告)号：JPS62203453A
公开(公告)日：1987-09-08
申请号：JP4536986
申请日：1986-03-04
申请人： TAMURA ELECTRIC WORKS LTD
发明人： MASUDA MITSUO , MATSUURA HIDEJI , SHINODA YOSHIO
IPC分类号： H04R17/02 , H04M1/19 , H04R1/38
摘要： PURPOSE:To obtain a proper and sufficient talking quality by arranging the 2nd piezoelectric diaphragm is opposite direction to the rear face of a transmitter in addition to a piezoelectric diaphragm receiving a talking voice, adopting the constitution to input surrounding noise to the 2nd piezoelectric diaphragm and connecting the 1st and 2nd piezoelectric diaphragms in opposite phase on the talking circuit. CONSTITUTION:The sound pressure by surrounding noise from various sound sources at a remote position parted from a transmitter 1, as shown in broken lines, is led into an enclosure 10 from a mouthpiece 10a provided to the transmitter receiver enclosure 10 and vent holes 14 for sound pressure introduction and acts on the front face of the 1st and 2nd piezoelectric diaphragms 3, 4 via front vent holes 5a of the front cover 5 and rear vent holes 6a of the rear cover 6. In this case, the phases of the sound pressures acting on both the diaphragms 3, 4 are nearly equal because the distance from the sound source to the diaphragms 3, 4 is remote and has almost no difference, the sound pressures are nearly of the same level, and output signals by the piezoelectric diaphragms 3, 4 have equal and opposite phase characteristics.

4. 发明专利

JPS5373012A HANDDFREE TELEPHONE SET 失效
公开(公告)号：JPS5373012A
公开(公告)日：1978-06-29
申请号：JP14875476
申请日：1976-12-13
申请人： TAMURA ELECTRIC WORKS LTD
发明人： KINOSHITA TOSHIJI , MASUDA MITSUO , SHINODA YOSHIO
IPC分类号： H04M1/60 , H04M1/21

5. 发明专利

JPS5226108A DATA TRANSMISSION SYSTEM 失效
公开(公告)号：JPS5226108A
公开(公告)日：1977-02-26
申请号：JP10205275
申请日：1975-08-25
申请人： TAMURA ELECTRIC WORKS LTD
发明人： OYAMADA TAKASHI , MASUDA MITSUO , KINOSHITA TOSHIJI , SHINODA YOSHIO
IPC分类号： H03M5/12 , H03M5/16 , H04L7/00 , H04L25/49
摘要： PURPOSE:By using the combined waveform corresponding to binary data, the data transmission of a high quality waveform shall be conducted.

6. 发明专利

JPH0541730A CORDLESS TELEPHONE SET 失效
公开(公告)号：JPH0541730A
公开(公告)日：1993-02-19
申请号：JP21810291
申请日：1991-08-05
申请人： TAMURA ELECTRIC WORKS LTD
发明人： TAKAHASHI HIROYUKI , MASUDA MITSUO
IPC分类号： H04W12/00 , H04B7/26 , H04M1/00 , H04M1/72
摘要： PURPOSE:To prevent tapping of a slave machine by giving an alarm at the time of detecting that a master machine cannot obtain the response from the slave machine because of takingaway of the slave machine to the outside of the service area of the master machine. CONSTITUTION:When detecting coming of a call period, a master machine 1 transmits a position confirmation signal. A slave machine receives this signal to transmit a response signal corresponding to the position confirmation signal. The master machine 1 starts a timer after transmission of the position confirmation signal and discriminates whether the timer expires at the time of reception of the response signal from the slave machine or not; and if it expires, an alarm 10 indicating that the position confirmation signal is not received is generated. Thus, the abnormality of the slave machine is detected.

7. 发明专利

JPH02155400A PIEZOELECTRIC RECEIVER 失效
公开(公告)号：JPH02155400A
公开(公告)日：1990-06-14
申请号：JP30876088
申请日：1988-12-08
申请人： TAMURA ELECTRIC WORKS LTD
发明人： TERATANI AKIRA , MASUDA MITSUO
IPC分类号： H04R17/00
摘要： PURPOSE:To make the sensitivity flat by increasing the static capacitance of a piezoelectric diaphragm, increasing the volume of a 1st back pressure chamber in the acoustic system, relaxing the damper effect and increasing the fundamental resonance frequency of the piezoelectric diaphragm so as to transfer the sound pressure energy toward the higher frequency. CONSTITUTION:With a signal applied to both terminal chips 7, 8 being input terminals, the piezoelectric diaphragm 1 vibrates in response to the signal and generates a sound wave. For example, the piezoelectric diaphragm 1 made of a ceramics piezoelectric substance 1a whose thickness is 0.1mm and whose outer diameter is 23mm and of a metallic base 1b whose thickness is 0.1mm and whose outer diameter is 23mm is employed. Then the static capacitance G of the piezoelectric diaphragm 1 is selected as 80nF-12nF, the volume V of the 1st back pressure chamber 5 is selected as 1cc-1.4cc and the fundamental resonance frequency of the acoustic system is selected as about 1.3-1.5kHz. Thus, the static capacitance C of the piezoelectric diaphragm 1 and the volume of the 1st back pressure chamber 5 are increased to relax the damper effect. Moreover, the fundamental resonance frequency of the diaphragm system is increased io transfer the sound pressure energy toward higher frequency thereby realizing making the frequency sensitivity flat.

8. 发明专利

JPH02113385A OPTICAL READER 失效
公开(公告)号：JPH02113385A
公开(公告)日：1990-04-25
申请号：JP26620488
申请日：1988-10-24
申请人： TAMURA ELECTRIC WORKS LTD
发明人： WATANABE TAKUMI , MATSUBARA HIDEYUKI , MASUDA MITSUO
IPC分类号： G06K9/20 , G06K9/28 , G06K9/62
摘要： PURPOSE:To decrease the number of components and to reduce the size and cost of the device by providing five light receiving elements for seven segments and recognizing display numerals 0 - 9. CONSTITUTION:Display light from five light emitting diodes B and D - G except light emitting diodes A and C among seven light emitting diodes A - G of a 1st digit 2-1 which are arranged in an 8 shape is received by a light reception part 1-1 in 1:1 proportion and supplied to a CPU 1-4. Similarly, light reception data of a 2nd digit 2-2 and a 3rd digit 2-3 are supplied to the CPU 1-4. The CPU 1-4 refers to pattern data made to correspond to the numerals 0 - 9 to recognize display numerals. Consequently, the numerals 0 - 9 of each digit can be read by five phototransistors 1-1a - 1-1e, 1-2a - 1-2e, and 1-3a - 1-3e, so the number of components is small and the device is reduced in size and cost.

9. 发明专利

JPS62203452A NOISE PREVENTING TYPE TRANSMITTER 失效
公开(公告)号：JPS62203452A
公开(公告)日：1987-09-08
申请号：JP4536886
申请日：1986-03-04
申请人： TAMURA ELECTRIC WORKS LTD
发明人： MASUDA MITSUO , MATSUURA HIDEJI , SHINODA YOSHIO
IPC分类号： H04R17/02 , H04M1/19 , H04R1/38
摘要： PURPOSE:To obtain a proper and sure noise preventing function by piercing small holes leading the sound pressure at a low frequency band due to surrounding noise into a diaphragm rear chamber in addition to damping holes to the rear face of a piezoelectric ceramic type transmitter so as to introduce the noise sound pressure at the low frequency band where the talking voice is easily unclear especially from the front face and rear face of the diaphragm thereby cancelling it. CONSTITUTION:The sound pressure at a low frequency band being problem to ensure especially the taking quality in the sound pressure caused by surrounding noise from various sound sources at a remote position parted from the transmitter 1 is led into an enclosure 10 from a mouthpiece 10a provided to the transmitter-receiver enclosure 10 and vent holes 21 for introducing sound pressure as shown in broken lines and acts onto the front face and the rear face of a diaphragm 3 via front bent holes 5a of the front cover 5 and small holes 20 as differential vent holes. In this case, the sound pressure acting onto both sides of the diaphragm 3 has no different phase because the distance between the sound source and the diaphragm 3 is remote and has almost no difference, the sound pressure has similar levels, then both the sound pressure are cancelled together at both sides of the diaphragm 3.

10. 发明专利

JPS5463605A PUSHHBUTTON DIAL TELEPHONE SET 失效
公开(公告)号：JPS5463605A
公开(公告)日：1979-05-22
申请号：JP12966877
申请日：1977-10-31
申请人： TAMURA ELECTRIC WORKS LTD
发明人： MASUDA MITSUO , KOBAYASHI YASUO , SHINODA YOSHIO
IPC分类号： H04M1/50 , H04M17/00

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