CA2158481A1 - Mobile communications equipment - Google Patents
Mobile communications equipmentInfo
- Publication number
- CA2158481A1 CA2158481A1 CA002158481A CA2158481A CA2158481A1 CA 2158481 A1 CA2158481 A1 CA 2158481A1 CA 002158481 A CA002158481 A CA 002158481A CA 2158481 A CA2158481 A CA 2158481A CA 2158481 A1 CA2158481 A1 CA 2158481A1
- Authority
- CA
- Canada
- Prior art keywords
- support
- telephone
- loudspeaker
- hands free
- microphones
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Abandoned
Links
Classifications
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04M—TELEPHONIC COMMUNICATION
- H04M1/00—Substation equipment, e.g. for use by subscribers
- H04M1/60—Substation equipment, e.g. for use by subscribers including speech amplifiers
- H04M1/6033—Substation equipment, e.g. for use by subscribers including speech amplifiers for providing handsfree use or a loudspeaker mode in telephone sets
- H04M1/6041—Portable telephones adapted for handsfree use
- H04M1/6075—Portable telephones adapted for handsfree use adapted for handsfree use in a vehicle
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04B—TRANSMISSION
- H04B1/00—Details of transmission systems, not covered by a single one of groups H04B3/00 - H04B13/00; Details of transmission systems not characterised by the medium used for transmission
- H04B1/38—Transceivers, i.e. devices in which transmitter and receiver form a structural unit and in which at least one part is used for functions of transmitting and receiving
- H04B1/3827—Portable transceivers
- H04B1/3877—Arrangements for enabling portable transceivers to be used in a fixed position, e.g. cradles or boosters
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01R—ELECTRICALLY-CONDUCTIVE CONNECTIONS; STRUCTURAL ASSOCIATIONS OF A PLURALITY OF MUTUALLY-INSULATED ELECTRICAL CONNECTING ELEMENTS; COUPLING DEVICES; CURRENT COLLECTORS
- H01R2201/00—Connectors or connections adapted for particular applications
- H01R2201/16—Connectors or connections adapted for particular applications for telephony
Landscapes
- Engineering & Computer Science (AREA)
- Signal Processing (AREA)
- Computer Networks & Wireless Communication (AREA)
- Telephone Set Structure (AREA)
- Mobile Radio Communication Systems (AREA)
- Fittings On The Vehicle Exterior For Carrying Loads, And Devices For Holding Or Mounting Articles (AREA)
Abstract
Telecommunications equipment comprising a portable telephone (1) provided with an antenna and a battery, and mechanically and electronically connected via a single lead (2) to a "bands free"
device (3) and a cigar-lighter power outlet (4). The "bands-free' device is housed partly in a connector (5) and partly in a housing (3) arranged between the portable phone (1) and the cigar-lighter power outlet (4).
device (3) and a cigar-lighter power outlet (4). The "bands-free' device is housed partly in a connector (5) and partly in a housing (3) arranged between the portable phone (1) and the cigar-lighter power outlet (4).
Description
A mobile communication equipment The object of the present object is a telecommunications equipment and, more particularly, a pocket telephone which can be taken aboard a veh icle .
Numerous manufacturers Or worldwide reputation produce and market all sorts of mobile or portable telephones, which all offer specific advantages, but of which none can provide a solution to all the situa-tions of use to which a user is confronted, with all his requirements.
Actually, so-called "portable" telephones are available which are lightweight, small in size and therefore easily carried, but their au-tonomy is relatively short and above all they cannot be used when dri-ving an automobile since one does not know where to affix them in the car; as mentioned, their autonomy is too short for a prolonged use wi-thout recharging or changing the batteries and, above all, they are not equipped with a "hands free" system, i. e. with a spacially diffusing microphone or a loudspeaker allowing the driver to drive his car during a telephone conversation without llolding in one hand said portable te-lephone. Even though this is still tolerated at present, it will soon not be the case any more, for obvious reasons of safety, since the dri-ver, who must concentrate on his telephone conversation, cannot at the same time drive carefully and safely his vehicle if only one hand is available, the other one being necessarily used for holding the por-table telephone. The non availability of a "hands free" system is also a drawback when the equipment is used elsewhere than in a car and when several persons are to take part in the conversation.
There are also car telephones which are installed permanently in a 2158~81 conventional car and which are generally provided with a "hands free"
system. These apparatuses require a permanent installation in the car and cannot therefore be used as portable telephones; they are in fact telephone sets which are permanently attached to a vehicle. These tele-phones need installation work on the vehicle.
There are further telephone sets of the portable type which can be used everywhere. They are quite bulky, their autonomy is sufficient, but they are heavy because of their large-sized batteries, they are most often not provided with a "hands free" system, so that they cannot be used for conferences between several persons and their use in cars is not problem free, since no means are provided for holding them in place and they can hence fall over during a rough ride, at a bend, etc.
These apparatuses have the size of a small attaché-case and are hence bulky and heavy, and they are accordingly less and less used, except in holiday houses or as second permanent telephone sets.
The object of the present invention is a telecommunications system and, more particularly, a pocket telephone which can be used in cars and for conferences.
It includes an accessory weighing less than 120 grams which allows the instant conversion of a pocket radiotelepllone into a "hands free"
car telephone or, when desired and also instantly, the pocket telephone into a home telephone which is also "hands free" and which can be used when one's hands are busy or to organize a telephone conference between two working parties remote from each another.
Several unsuccessful attempts have been made, to try and acljoin a "hands rree" pocket system to a pocket ra(liotelepllone. These attempts hRve nll rniled, because n surficient miniaturizntion Or the "hnnds free" system could not be achieved, accompanied by an elimination of the Larsen effect thereby created.
The present equipment overcomes the drawbacks of the above-mentioned apparatuses and is defined by the characteristic features of claim 1.
The annexed drawing illustrates schematically and by way of example several possible embodiments of the telephone equipment according to the invention.
Figure 1 illustrates in a perspective view of a first embodiment of the telephone equipment and of a pocket telephone.
Figure 2 is a wiring diagram of a portion of the "hands free" cir-cuit contained in the multiple function connector or in a support.
Figure 3 is a wiring diagram of a portion of the electronic circuit of the "hands free" device contained in a case or a support.
Figure 4 illustrates in a perspective view a second embodiment of the telephone equipment according to the invention.
Figure S illustrates a perspective view a third embodiment of the telephone equipment according to the invention.
Figure 6 is a wiring diagram of the electronic circuit contained in the support of the third embodiment illustrated in figure 5.
The pocket telecommunications equipment according to the present invention includes a pocket telephone having an extended autonomy, owing to a rechargeable battery, and incorporating all the options available with the high-technology apparatuses of this type. The appa-ratus can be of the "Natel C" type, "Telecom 2000" or any other, fitted with its antenna.
The present pocket telephone is particularly well suited for taking aboard a vehicle, to be used as a car telephone with the "hands free"
equipment, without at the same time requiring any permanent installa-tion inside the vehicle. It is also particularly well suited for use in conferences involving several persons, also without requiring any per-manent installation.
In the first embodiment illustrated in figures 1 through 3, this pocket telephone 1 is connected mecllanically and electrically by means of a multiple function connector 5 ancl a single cable 2 to a "hands free" case 3 and to a low-voltage power supply plug 4, generally of the "cigarette lighter" type.
The body of the "hands free" device can have, in particular, the shape of a small case of approximately 4 cm x 4 cm x 2 cm, it includes an electronic printed circuit adapted to the electronics of the pocket radiotelephone. This circuit manages and distributes the signals accor-ding to a predetermined scheme, between the different elements of the telephone, of which the power supply levels range from 7 to 30 V. In the other possible versions, there is provided inside or outside this housing an audio diffuser system which makes it possible to hear clear-ly the partner, when the telephone set is at a short distance and vi-sible to the user.
The electric cable 2 has electric conductors ensuring the connec-tion between the "cigarette lighter" plug and the pocket telephone 1, to ensure both is power supply and the charging of its incorporated battery .
Finally, this electric cable 2 provides at the same time the mecha-nical support of the "hands free" case 3. To this end, this "hands free" case 3 is located in the vicinity of the "cigarette lighter" plug s 4 and the electric cable 2 or at least its sheathing in the section connecting this plug 4 to the "hands free" case is mechanically resis-tant and relatively rigid. Accordingly, when the plug 4 is engaged in-side the "cigarette lighter" jack of a vehicle, this section of the ri-gid cable acts as a support and as a fastening means for the "hands free" case.
Conversely, tlle other portion of cable 2 connecting the "hands free" case to the pocket telephone is flexible and extensible, as it is the common practice, to provide for ease of handling of the pocket te-lephone 1.
The end of the cable 2 is connected to the pocket telephone I by means of a connector 5. This connector carries a part of the "hands free" electric circuit of the present equipment, illustrated in figure 2 and includes in particular a microphone 6 and its associated circuit.
When the connector 5 is connected to a pocket telephone set 1, the mi-crophone 6 is automatically switched on, wlllle that incorporated into the telephone set is automatically switched off.
This connector 5 can be plugged in by means of its connexion pins a...g into the pocket telephone 1 and is connected by the multiple-wire cable 2b to the case 3. The switch S makes it possible to actuate ei-ther an external antenna or the internal antenna of the device.
The pocket telephone is furthermore provided with a fastening mem-ber for mounting on the surface of the dashboard of a vehicle or for placing it on a seat so that it cannot move. This fastening member can be made as a suction cup affixed to the pocket telephone, which makes possible its attachment to a smooth surface by the simple exertion of a pressure.
2158~81 This fastening member can also be formed as a strip of fabric bea-ring hooks, affixed to the pocket telephone 1 and cooperating with a corresponding strip of fabric bearing hooks affixed to where the user wishes. This second strip of fabric bearing hooks can be affixed for example to a heavy pad, for example loaded with small shot, which has one non-slipping surface. One can thus fasten the pocket telephone anywhere or lay the pad down and apply the telephone set thereto.
The assembly formed by the pocket telephone and its power supply cable carrying the connector, the "hands free" case and the "cigarette lighter" plug needs very little space. It can be stored away in a very small bag. This would remain true even if the user wanted to take with him a device for charging and power supplying through the electric net-work and a member for affixing the telephone, i.e. a suction cup or pad .
A universal pocket telephone is thus obtained which is of a very small bulk.
Thus, this equipment, which is primarily designed for use in vehi-cles without having to be mounted fixedly, can also be used as a pocket telephone outskle the vehicle.
This equipment is designed to include a 220 V / 12 V transformer-rectifier provided with an electric cord for connection to a 220 V
electric network and a jack identical to that of the cigarette lighter of the car.
Thus, the user can power supply his pocket telephone 1 and recharge its battery elsewhere than in his car, by using the power supply case and such a transformer. One can hence use this pocket telephone as a telephone with spacially diffusing loudspeakers for conferences invol-ving several users. One can thus use this telephone as a "hands free"telephone with spacially diffusing loudspeakers both inside a car and in a conference room or at home.
Accordingly, this apparatus satisfies all the requirements placed both on a car telephone and on a pocket telephone with spacially diffu-sing loudspeakers, without having any of the drawbacks of existing ap-paratuses.
This is achieved, in particular, by the physical separation of the HP loudspeaker from the "hands free" case 3 and the microphone 6 of the connector 5 and their associated anti-Larsen circuits, replacing the microphone and the loudspeaker of the telephone 1 itself, when it is connected to the present equipment.
It can be used both as a car telephone set or as a pocket tele-phone, without requiring any particular installation for any of its uses. The device, which weighs only 120 grams is infinitely lighter and of course much less bulky than a mobile telephone, while retaining all its capacities and ease Or use. When tlle pocket telephone is removed from the above-mentioned "hands free" device, it has again its initial weigh, while retaining the totality of its functions and all its mobi-lity as a pocket telephone; in a car, it requires no fixed installation in the vehicle, has a "hands free" system and special anti-Larsen cir-cuits, and is provided with holding or fastening means which are simple and novel, for example a suction cup or a pad. Furthermore, it can be power supplied from the "cigarette lighter" jack of a vehicle, which at the same time ensures the charging of the battery, so that the total capacity of the rechargeable battery of the pocket telephone is always available when the latter is used separately. When used in a conference 2l58181 room, it can be connected to a 220 V electric network via an auxiliary transformer.
For the individual user, this equipment furthermore offers the ad-vantage that it can be used in any store, shop, supermarket, etc, since it requires no mounting and is instantly ready to be used as soon as a dial number is affected thereto by the appropriate administration, which could even be done in the future at the point of time when the item is purchased.
In the case of companies leasing cars and managing fleets of seve-ral thousand cars, this apparatus could be even more advantageous.
There is no point in such companies equipping all their cars with the "hands free" system or even with telephones, which means that a custo-mer can only rent at a high cost a luxury car equipped with a tele-phone, provided one is still available.
With the equipment proposed in this invention (pocket radiotele-phone ~ pocket "hands free" device), this equipment can be rented inde-pendently of the rental of the car and placed into the luxury car or into the standard car selected by the customer.
1. A complete "hands free" telephone system can be connected to the "cigarette lighter" jack of the car, and provide access immediately to the world telephone system, simply and neatly, without any ins-tallation cost, nor the purchase of any additional item.
2. The user can change to another car, immediately and without the as-sistance of a technician, and continue to use his telephone in atotally reliable manner in another car, or in any other place out-side h is car .
Numerous manufacturers Or worldwide reputation produce and market all sorts of mobile or portable telephones, which all offer specific advantages, but of which none can provide a solution to all the situa-tions of use to which a user is confronted, with all his requirements.
Actually, so-called "portable" telephones are available which are lightweight, small in size and therefore easily carried, but their au-tonomy is relatively short and above all they cannot be used when dri-ving an automobile since one does not know where to affix them in the car; as mentioned, their autonomy is too short for a prolonged use wi-thout recharging or changing the batteries and, above all, they are not equipped with a "hands free" system, i. e. with a spacially diffusing microphone or a loudspeaker allowing the driver to drive his car during a telephone conversation without llolding in one hand said portable te-lephone. Even though this is still tolerated at present, it will soon not be the case any more, for obvious reasons of safety, since the dri-ver, who must concentrate on his telephone conversation, cannot at the same time drive carefully and safely his vehicle if only one hand is available, the other one being necessarily used for holding the por-table telephone. The non availability of a "hands free" system is also a drawback when the equipment is used elsewhere than in a car and when several persons are to take part in the conversation.
There are also car telephones which are installed permanently in a 2158~81 conventional car and which are generally provided with a "hands free"
system. These apparatuses require a permanent installation in the car and cannot therefore be used as portable telephones; they are in fact telephone sets which are permanently attached to a vehicle. These tele-phones need installation work on the vehicle.
There are further telephone sets of the portable type which can be used everywhere. They are quite bulky, their autonomy is sufficient, but they are heavy because of their large-sized batteries, they are most often not provided with a "hands free" system, so that they cannot be used for conferences between several persons and their use in cars is not problem free, since no means are provided for holding them in place and they can hence fall over during a rough ride, at a bend, etc.
These apparatuses have the size of a small attaché-case and are hence bulky and heavy, and they are accordingly less and less used, except in holiday houses or as second permanent telephone sets.
The object of the present invention is a telecommunications system and, more particularly, a pocket telephone which can be used in cars and for conferences.
It includes an accessory weighing less than 120 grams which allows the instant conversion of a pocket radiotelepllone into a "hands free"
car telephone or, when desired and also instantly, the pocket telephone into a home telephone which is also "hands free" and which can be used when one's hands are busy or to organize a telephone conference between two working parties remote from each another.
Several unsuccessful attempts have been made, to try and acljoin a "hands rree" pocket system to a pocket ra(liotelepllone. These attempts hRve nll rniled, because n surficient miniaturizntion Or the "hnnds free" system could not be achieved, accompanied by an elimination of the Larsen effect thereby created.
The present equipment overcomes the drawbacks of the above-mentioned apparatuses and is defined by the characteristic features of claim 1.
The annexed drawing illustrates schematically and by way of example several possible embodiments of the telephone equipment according to the invention.
Figure 1 illustrates in a perspective view of a first embodiment of the telephone equipment and of a pocket telephone.
Figure 2 is a wiring diagram of a portion of the "hands free" cir-cuit contained in the multiple function connector or in a support.
Figure 3 is a wiring diagram of a portion of the electronic circuit of the "hands free" device contained in a case or a support.
Figure 4 illustrates in a perspective view a second embodiment of the telephone equipment according to the invention.
Figure S illustrates a perspective view a third embodiment of the telephone equipment according to the invention.
Figure 6 is a wiring diagram of the electronic circuit contained in the support of the third embodiment illustrated in figure 5.
The pocket telecommunications equipment according to the present invention includes a pocket telephone having an extended autonomy, owing to a rechargeable battery, and incorporating all the options available with the high-technology apparatuses of this type. The appa-ratus can be of the "Natel C" type, "Telecom 2000" or any other, fitted with its antenna.
The present pocket telephone is particularly well suited for taking aboard a vehicle, to be used as a car telephone with the "hands free"
equipment, without at the same time requiring any permanent installa-tion inside the vehicle. It is also particularly well suited for use in conferences involving several persons, also without requiring any per-manent installation.
In the first embodiment illustrated in figures 1 through 3, this pocket telephone 1 is connected mecllanically and electrically by means of a multiple function connector 5 ancl a single cable 2 to a "hands free" case 3 and to a low-voltage power supply plug 4, generally of the "cigarette lighter" type.
The body of the "hands free" device can have, in particular, the shape of a small case of approximately 4 cm x 4 cm x 2 cm, it includes an electronic printed circuit adapted to the electronics of the pocket radiotelephone. This circuit manages and distributes the signals accor-ding to a predetermined scheme, between the different elements of the telephone, of which the power supply levels range from 7 to 30 V. In the other possible versions, there is provided inside or outside this housing an audio diffuser system which makes it possible to hear clear-ly the partner, when the telephone set is at a short distance and vi-sible to the user.
The electric cable 2 has electric conductors ensuring the connec-tion between the "cigarette lighter" plug and the pocket telephone 1, to ensure both is power supply and the charging of its incorporated battery .
Finally, this electric cable 2 provides at the same time the mecha-nical support of the "hands free" case 3. To this end, this "hands free" case 3 is located in the vicinity of the "cigarette lighter" plug s 4 and the electric cable 2 or at least its sheathing in the section connecting this plug 4 to the "hands free" case is mechanically resis-tant and relatively rigid. Accordingly, when the plug 4 is engaged in-side the "cigarette lighter" jack of a vehicle, this section of the ri-gid cable acts as a support and as a fastening means for the "hands free" case.
Conversely, tlle other portion of cable 2 connecting the "hands free" case to the pocket telephone is flexible and extensible, as it is the common practice, to provide for ease of handling of the pocket te-lephone 1.
The end of the cable 2 is connected to the pocket telephone I by means of a connector 5. This connector carries a part of the "hands free" electric circuit of the present equipment, illustrated in figure 2 and includes in particular a microphone 6 and its associated circuit.
When the connector 5 is connected to a pocket telephone set 1, the mi-crophone 6 is automatically switched on, wlllle that incorporated into the telephone set is automatically switched off.
This connector 5 can be plugged in by means of its connexion pins a...g into the pocket telephone 1 and is connected by the multiple-wire cable 2b to the case 3. The switch S makes it possible to actuate ei-ther an external antenna or the internal antenna of the device.
The pocket telephone is furthermore provided with a fastening mem-ber for mounting on the surface of the dashboard of a vehicle or for placing it on a seat so that it cannot move. This fastening member can be made as a suction cup affixed to the pocket telephone, which makes possible its attachment to a smooth surface by the simple exertion of a pressure.
2158~81 This fastening member can also be formed as a strip of fabric bea-ring hooks, affixed to the pocket telephone 1 and cooperating with a corresponding strip of fabric bearing hooks affixed to where the user wishes. This second strip of fabric bearing hooks can be affixed for example to a heavy pad, for example loaded with small shot, which has one non-slipping surface. One can thus fasten the pocket telephone anywhere or lay the pad down and apply the telephone set thereto.
The assembly formed by the pocket telephone and its power supply cable carrying the connector, the "hands free" case and the "cigarette lighter" plug needs very little space. It can be stored away in a very small bag. This would remain true even if the user wanted to take with him a device for charging and power supplying through the electric net-work and a member for affixing the telephone, i.e. a suction cup or pad .
A universal pocket telephone is thus obtained which is of a very small bulk.
Thus, this equipment, which is primarily designed for use in vehi-cles without having to be mounted fixedly, can also be used as a pocket telephone outskle the vehicle.
This equipment is designed to include a 220 V / 12 V transformer-rectifier provided with an electric cord for connection to a 220 V
electric network and a jack identical to that of the cigarette lighter of the car.
Thus, the user can power supply his pocket telephone 1 and recharge its battery elsewhere than in his car, by using the power supply case and such a transformer. One can hence use this pocket telephone as a telephone with spacially diffusing loudspeakers for conferences invol-ving several users. One can thus use this telephone as a "hands free"telephone with spacially diffusing loudspeakers both inside a car and in a conference room or at home.
Accordingly, this apparatus satisfies all the requirements placed both on a car telephone and on a pocket telephone with spacially diffu-sing loudspeakers, without having any of the drawbacks of existing ap-paratuses.
This is achieved, in particular, by the physical separation of the HP loudspeaker from the "hands free" case 3 and the microphone 6 of the connector 5 and their associated anti-Larsen circuits, replacing the microphone and the loudspeaker of the telephone 1 itself, when it is connected to the present equipment.
It can be used both as a car telephone set or as a pocket tele-phone, without requiring any particular installation for any of its uses. The device, which weighs only 120 grams is infinitely lighter and of course much less bulky than a mobile telephone, while retaining all its capacities and ease Or use. When tlle pocket telephone is removed from the above-mentioned "hands free" device, it has again its initial weigh, while retaining the totality of its functions and all its mobi-lity as a pocket telephone; in a car, it requires no fixed installation in the vehicle, has a "hands free" system and special anti-Larsen cir-cuits, and is provided with holding or fastening means which are simple and novel, for example a suction cup or a pad. Furthermore, it can be power supplied from the "cigarette lighter" jack of a vehicle, which at the same time ensures the charging of the battery, so that the total capacity of the rechargeable battery of the pocket telephone is always available when the latter is used separately. When used in a conference 2l58181 room, it can be connected to a 220 V electric network via an auxiliary transformer.
For the individual user, this equipment furthermore offers the ad-vantage that it can be used in any store, shop, supermarket, etc, since it requires no mounting and is instantly ready to be used as soon as a dial number is affected thereto by the appropriate administration, which could even be done in the future at the point of time when the item is purchased.
In the case of companies leasing cars and managing fleets of seve-ral thousand cars, this apparatus could be even more advantageous.
There is no point in such companies equipping all their cars with the "hands free" system or even with telephones, which means that a custo-mer can only rent at a high cost a luxury car equipped with a tele-phone, provided one is still available.
With the equipment proposed in this invention (pocket radiotele-phone ~ pocket "hands free" device), this equipment can be rented inde-pendently of the rental of the car and placed into the luxury car or into the standard car selected by the customer.
1. A complete "hands free" telephone system can be connected to the "cigarette lighter" jack of the car, and provide access immediately to the world telephone system, simply and neatly, without any ins-tallation cost, nor the purchase of any additional item.
2. The user can change to another car, immediately and without the as-sistance of a technician, and continue to use his telephone in atotally reliable manner in another car, or in any other place out-side h is car .
3. Should the user decide to go walking or go travelling by train, 2158~81 taxi or ship, he will take with him his pocket telephone, possibly with an additional battery in his luggage and a small conventional power supply plug for recharging the batteries from time to time.
4. The options and freedom offered by a car leasing company to their customers will be considerably increased, since the latter will have the possibility of choosing any car from the fleet and never-theless enjoy the benefits of a portable telephone, without the need that all the cars be equipped with any permanent installation.
For a car leasing company, this advantage would represent savings of about 80% of the cost of installing a conventional "hands free"
standard system, i. e. mounted fixedly, in each vehicle.
For a car leasing company, this advantage would represent savings of about 80% of the cost of installing a conventional "hands free"
standard system, i. e. mounted fixedly, in each vehicle.
5. The user can also connect the pocket telephone to the 220 V elec-tric network via an auxiliary transformer and have at his disposal a telephone with spacially diffusing loudspeakers in any office or prem ises .
In the embodiment illustrated in figures 1 through 3, the assembly forming the portable telecommunications system consists of a pocket te-lephone 1 and of a low-voltage power supply/"hands free" device.
This low-voltage power supply/"hands free" device includes a "cigarette lighter" plug 4 designed for plugging into a low-voltage po-wer supply jack, a "hands free device" 3 and an electric cable 2 connecting on the one hand the pocket telephone 1 to the "hands free"
case 3 via a multiple function connector 5 incorporating the "hands free" microphone and its associated circuit and, on the other hand, this "hands free" case 3 to a low-voltnge power sllpply plu~ ~. Tllis clectric cablc inclll(les n first portion 2n WhiCIl iS relntively rigill nn(l sllort bctwccn Ihc phlg ~i nn(l the "hnn(ls rrce" cnsc 3, nn(l n sccon(l 215~481 portion 2b which is flexible, extensible and relatively long, between the "hands free" device 3 and the connector 5.
This assembly allows the user of a pocket radiotelephone to converse without having to place the handset against his ear. The user can leave the handset on its support, provided the same are in full view of the user.
This has been made possible by the use of a sophisticated electro-nic circuit including several high quality filters and various low-noise amplifier circuits, all connected to a special loudspeaker and a special microphone, housed respectively in the case 3 and in the connector 5. Even though the circuit was miniaturized, the device could be made without any trace of the Larsen effect, to produce a communica-tion which is 100~ neat and clear, in a duplex communication.
Figure 2 illustrates this electronic circuit housed in the case 3, which includes two amplifier stages using the integrated amplifiers U1 and U2 of the 082 type, wherein the BFIN input receives the low-frequency signals arriving from the pocket telephone 1. The output of this chain of amplifiers is fed via an adjustable potentiometer Pl to a filtering circuit including in particular an integrated circuit U3 of the MC 34019 type supplying the loudspeaker HP. This electronic circuit makes it possible to avoid ancJ to suppress any oscillations parasites or interrercnces between tl1e loudspeaker l-IP nnd the micropllone incorpo-rntc(l inlo the conllcclor 5.
I;urthermore, a low-voltage power supply is incorporated so that it can also power supply the pocket telephone when it is connected to the "hands free" device, which makes it possible to decrease the number of connections necessary for the use of a multiple function connector 5 11 21~8481 between the portion 2a Or the electric cable 2 and the pocket telephone 1. This supply allows for the simultaneous power supply of the electro-nic circuit of the "hands free" device and the recharging of the batte-ries of the pocket radiotelephone 1, so that the same may be constantly ready for use without an external power supply.
This low-voltage power supply is connected to the "cigarette ligh-ter" plug by two leads V BAT IN and is grounded, and it produces a first voltage ~V for power supplying the pocket telephone and the inte-grated circuit U3, as well as a second voltage ~V/2 for power supplying the "hands free" electronic circuit.
Clearly, this embodiment makes it possible, to limit the number of electric conductors in cable 2 to two conductors in the portion 2a and to three in the portion 2b of the cable 2.
The assembly of the "hands free" electronic circuit, of the power supply and of the loudspeaker are housed in a small rigid case.
In the example illustrated, a multiple function connector 5 allows the connection of the power supply/"hands free" device 2, 3, 4 to the pocket telephone 1 and incorporates the microphone and its associated circuit.
In brief, the "hands free" equipment proposed includes:
a) A molded connector which fits snugly into a mobile cellular tele-phone. It includes an anti-Larsen circuit, a preamplifier and filters.
There is also incorporated a microphone, held in an injected silicone membrane specially designed for preventing the transmission of vibra-tion, which, without such a means, would produce a background noise when sounds are emitted.
b) A compact moulded box incorporating a "system management" printed circuit, a "fast recharge" circuit (from O to 90% in 1 hr), a loudspea-ker with its amplifier and a potentiometer adjustable by means of a small serrated wheel protruding by 2 mm on one side of the box.
c) A car "cigarette lighter" phlg.
d) A light spirally shaped cable which extends from part S through part 3 and ends at part 4.
Figure 4 illustrates a second embodiment Or the telecommunications equipment according to the invention. Tn this embodiment, which is even more compact and easy to use than the first one, the mobile telephone or pocket telephone 1 can be placed on a support 10 which can be atta-ched to any component of the dashboard of a vehicle, for example by a selfadhesive strip or a strip of a fabric bearing hooks. This support 10 includes, in its lower part, a connector which corresponds to that of a radiotelephone and which can be plugged for its operation, i.e.
its power supply and the recharging of its own batteries, into the ci-garette lighter jack of a vehicle. The lower part of this support 10 includes, in the same way as the connector 5 of the first embodiment, a microphone 11 which, upon the placement of the radiotelephone on the support is automatically switched on, whereas that incorporated into the pocket telephone is switched off.
The lower part of the support 10 includes the loudspeaker 12, which, in the first embodiment, was placed inside the case 3.
Electronic charging circuits and anti-Larsen circuits similar to those illustrated in figures 2 and 3 are included in this embodiment, molded or embedded in the body forming the support 10.
The spirally shaped cord 13 connects the support, its electronic circuits, the connector, the microphone 11 and the loudspeaker to the plug 14 of a cigarette lighter.
This second embodiment is even more convenient to the user, since the support 10 can be fastened removably or not, inside a vehicle, and connected to the cigarette lighter: the user only needs to place his pocket telephone on the support when he climbs into his car.
Thus, in this second embodiment which is more compact and easy to use, the equipment includes in particular a microphone, an anti-Larsen circuit, an amplifier and a fast charger for the battery (from 0 to 90~
in 1 hr) housed in a support. This system makes it possible to bring in an appropriate vicinity the loudspeaker ànd the microphone, which fur-ther facilitates the miniaturization Or the system, while avoiding any Larsen effect. The molded support made integrally contains the system and measures at the most 15 x 6,5 cm x 4 cm and, depending on the mo-del, can even be further reduced in size. It will be connected to the cigarette lighter by means of a continuous spirally shaped cord. Its total weight is of about 200 g (with the spirally shaped cord and its connector connecting it to the cigarette lighter of the car). In each one of the different versions, the equipment is perfectly compatible with the most recent mobile/pocket telephone sets.
This equipment eliminates all undesirable noises, Larsen effect, whistling sounds, buzzing and other background noises, it transmits and reproduces simply, accurately and with the same degree of quality, all the sounds which are received or emitted through the cellular telephone network to which it is connected.
The third embodiment illustrated in figures 5 and 6 of the telecom-munications equipment, which is the most sophisticated embodiment and which is also the preferred design, includes a mobile telephone 20 which can be placed on a support 21, connected by an extensible lead 22 to a plug 23, here the plug of a cigarette lighter, making it possible to connect it electrically to a source of electric energy either direc-tly, in the case of the cigarette lighter of a vehicle being used, or via a transformer in the case of a connection to an electric network.
The support 21 can include means for fastening the same to the dashboard of a vehicle or a conference table. It includes conventional electric connections or contacts, cooperating with those of the mobile telephone 20, which can be plugged into the mobile telephone, to pro-vide for the functions of charging the battery of the mobile telephone 20 and switching off of the incorporated loudspeaker and the micro-phone, which are replaced by a loudspeaker 24 and two microphones 25, 26 mounted in said support 21, when the mobile telephone 20 is placed on the support 21.
The geometrical and/or spatial positioning of the microphones 25, 26 with respect to the loudspeaker 24 is critical. A symmetrical arran-gement is essential to ensure a transmission of the audio signals of the loudspeaker 24 to each microphone with an intensity substantially identical .
The microphones 25, 26 are furthermore positioned or designed in such a manner as to receive the sounds from their surrounding in a di-rectional or selective manner, the microphone 25 being mucll more sensi-tive to sollnds coming from the lert of the support, whereas the micro-r)hone 26 is mllCIl morc sensitive to the sol~n(ls coming from the right hnnd sidc Or the slll-port 2l.
Tl~c clcctrollic circuit Or this thircl em(~odimellt is illustrntecl schelnatically in figure 6.
The two microphones 25, 26 are connected to the terminals Ml~, M1-and M2~, M2-, whereas the terminals FL3, FL4, FL6, Bat~ and Bat- are connected to the support contacts 21 designed for cooperating with the contacts of the mobile telephone 20, when the same is placed on the support 21.
One can see that the signals of the microphones 25, 26 are fed to the inputs of a differential amplifier IC4A; LM833N, of which the out-put signal corresponds to the difference in the signals output by the microphones 25, 26.
Thus, when these microphones 25, 26 are stressed by the loudspeaker 24, their output signals substantially cancel each other since they are positioned symmetrically with respect to this loudspeaker 24. However, when they deliver signals originating from the user of the telephone, who is never centrally positioned with respect to the support 21, the difference between the signals of the microphones 25, 26 produces a si-gnal of a sufficient value for the functioning of the telephone equipment.
Thus, through the symmetrical disposition of the two microphones with respect to the loudspeaker and the use of a differential ampli-fier, substantially all the problems of oscillations parasites and Larsen effect are eliminated in a manner which is simple, intelligent and effective.
The functioning of this third embodiment is as follows:
Upon insertion of the mobile telephone 20 in the support 21, a switch designed for this purpose causes the switching on of the louds-peaker 24 and of the external microphones 25, 26. A fast charger is al-so switched on and allows the charging of the battery included in the mobile telephone, if necessary. Circuits which form part of the elec-tronics of the system adjust the voltages necessary for the proper functioning of said electronics. To facilitate the description Or the device, one should consider the three principal parts:
1. Receiver circuit of the partner:
The signal produced by the mobile telephone 20 corresponding to the message being received is brought through appropriate connections to the circuit IC5, which is an important component. The main function of this component is to prevent that the loop, including the microphones of the device, the transmission circuit of tlle signals of the user, the receiver circuit of the partner as well as his loudspeaker, followed by the microphone of this same partner and all the circuits up to the loudspeaker of the user of the device, starts oscillating (oscillations parasites or Larsen effect) when the overall gain of the loop described reaches a sufficient value. After processing and after an amplification carried out by the circuit IC3, this signal is used for actuating the loudspeaker HP, which will produce an audio output which is adequate for the intended purpose.
2. Circuit for processing signals:
To describe the functioning of this circuit, one must consider that the device can be, at any given time, in one of the three following states:
a) transmission (the user is talking) b) reception (the partner is talking) c) standby (neither the partner, nor the user is speaking) To each one of these states will correspond certain internal condi-tions in the processing circuit. To simplify, the amplification of the microphones will be maximum during the state of transmission; to this maximum gain of the microphones will correspond a minimum amplification of the loudspeaker for the corresponding signal. In the same manner, when the device is in the reception state, the amplification of the si-gnal of the partner will be maximum at this loudspeaker and to this maximum gain at the loudspeaker will corlespond a minimum amplification of the signal of the microphones of the user. In the standby state, in-termediate amplification levels are defined, again for the purpose of preventing oscillations parasites or the Larsen effect.
The use of two microphones mounted symmetrically with respect to the loudspeaker, as well as with respect to the front face of the de-vice, provides several advantages in this mode of utilisation:
1) The acoustic signals transmitted by the loudspeaker will be re-ceived in a manner substantially identical by each microphone. A diffe-rential preamplifier makes it possible to attenuate, if not to elimi-nate, the common component arriving from the loudspeaker, which results in a significant decrease of the signal which would have produced amongst others, oscillations parasites.
2) A certain attenuation of the ambient noise is equally obtained in this manner.
3) Owing to the position of microphones, the utilization by the front seat passengers will be perfect.
4) The equipment can be used indifferently in a vehicle with a steering wheel on the right hand side or on the left hand side, without any modification.
In the embodiment illustrated in figures 1 through 3, the assembly forming the portable telecommunications system consists of a pocket te-lephone 1 and of a low-voltage power supply/"hands free" device.
This low-voltage power supply/"hands free" device includes a "cigarette lighter" plug 4 designed for plugging into a low-voltage po-wer supply jack, a "hands free device" 3 and an electric cable 2 connecting on the one hand the pocket telephone 1 to the "hands free"
case 3 via a multiple function connector 5 incorporating the "hands free" microphone and its associated circuit and, on the other hand, this "hands free" case 3 to a low-voltnge power sllpply plu~ ~. Tllis clectric cablc inclll(les n first portion 2n WhiCIl iS relntively rigill nn(l sllort bctwccn Ihc phlg ~i nn(l the "hnn(ls rrce" cnsc 3, nn(l n sccon(l 215~481 portion 2b which is flexible, extensible and relatively long, between the "hands free" device 3 and the connector 5.
This assembly allows the user of a pocket radiotelephone to converse without having to place the handset against his ear. The user can leave the handset on its support, provided the same are in full view of the user.
This has been made possible by the use of a sophisticated electro-nic circuit including several high quality filters and various low-noise amplifier circuits, all connected to a special loudspeaker and a special microphone, housed respectively in the case 3 and in the connector 5. Even though the circuit was miniaturized, the device could be made without any trace of the Larsen effect, to produce a communica-tion which is 100~ neat and clear, in a duplex communication.
Figure 2 illustrates this electronic circuit housed in the case 3, which includes two amplifier stages using the integrated amplifiers U1 and U2 of the 082 type, wherein the BFIN input receives the low-frequency signals arriving from the pocket telephone 1. The output of this chain of amplifiers is fed via an adjustable potentiometer Pl to a filtering circuit including in particular an integrated circuit U3 of the MC 34019 type supplying the loudspeaker HP. This electronic circuit makes it possible to avoid ancJ to suppress any oscillations parasites or interrercnces between tl1e loudspeaker l-IP nnd the micropllone incorpo-rntc(l inlo the conllcclor 5.
I;urthermore, a low-voltage power supply is incorporated so that it can also power supply the pocket telephone when it is connected to the "hands free" device, which makes it possible to decrease the number of connections necessary for the use of a multiple function connector 5 11 21~8481 between the portion 2a Or the electric cable 2 and the pocket telephone 1. This supply allows for the simultaneous power supply of the electro-nic circuit of the "hands free" device and the recharging of the batte-ries of the pocket radiotelephone 1, so that the same may be constantly ready for use without an external power supply.
This low-voltage power supply is connected to the "cigarette ligh-ter" plug by two leads V BAT IN and is grounded, and it produces a first voltage ~V for power supplying the pocket telephone and the inte-grated circuit U3, as well as a second voltage ~V/2 for power supplying the "hands free" electronic circuit.
Clearly, this embodiment makes it possible, to limit the number of electric conductors in cable 2 to two conductors in the portion 2a and to three in the portion 2b of the cable 2.
The assembly of the "hands free" electronic circuit, of the power supply and of the loudspeaker are housed in a small rigid case.
In the example illustrated, a multiple function connector 5 allows the connection of the power supply/"hands free" device 2, 3, 4 to the pocket telephone 1 and incorporates the microphone and its associated circuit.
In brief, the "hands free" equipment proposed includes:
a) A molded connector which fits snugly into a mobile cellular tele-phone. It includes an anti-Larsen circuit, a preamplifier and filters.
There is also incorporated a microphone, held in an injected silicone membrane specially designed for preventing the transmission of vibra-tion, which, without such a means, would produce a background noise when sounds are emitted.
b) A compact moulded box incorporating a "system management" printed circuit, a "fast recharge" circuit (from O to 90% in 1 hr), a loudspea-ker with its amplifier and a potentiometer adjustable by means of a small serrated wheel protruding by 2 mm on one side of the box.
c) A car "cigarette lighter" phlg.
d) A light spirally shaped cable which extends from part S through part 3 and ends at part 4.
Figure 4 illustrates a second embodiment Or the telecommunications equipment according to the invention. Tn this embodiment, which is even more compact and easy to use than the first one, the mobile telephone or pocket telephone 1 can be placed on a support 10 which can be atta-ched to any component of the dashboard of a vehicle, for example by a selfadhesive strip or a strip of a fabric bearing hooks. This support 10 includes, in its lower part, a connector which corresponds to that of a radiotelephone and which can be plugged for its operation, i.e.
its power supply and the recharging of its own batteries, into the ci-garette lighter jack of a vehicle. The lower part of this support 10 includes, in the same way as the connector 5 of the first embodiment, a microphone 11 which, upon the placement of the radiotelephone on the support is automatically switched on, whereas that incorporated into the pocket telephone is switched off.
The lower part of the support 10 includes the loudspeaker 12, which, in the first embodiment, was placed inside the case 3.
Electronic charging circuits and anti-Larsen circuits similar to those illustrated in figures 2 and 3 are included in this embodiment, molded or embedded in the body forming the support 10.
The spirally shaped cord 13 connects the support, its electronic circuits, the connector, the microphone 11 and the loudspeaker to the plug 14 of a cigarette lighter.
This second embodiment is even more convenient to the user, since the support 10 can be fastened removably or not, inside a vehicle, and connected to the cigarette lighter: the user only needs to place his pocket telephone on the support when he climbs into his car.
Thus, in this second embodiment which is more compact and easy to use, the equipment includes in particular a microphone, an anti-Larsen circuit, an amplifier and a fast charger for the battery (from 0 to 90~
in 1 hr) housed in a support. This system makes it possible to bring in an appropriate vicinity the loudspeaker ànd the microphone, which fur-ther facilitates the miniaturization Or the system, while avoiding any Larsen effect. The molded support made integrally contains the system and measures at the most 15 x 6,5 cm x 4 cm and, depending on the mo-del, can even be further reduced in size. It will be connected to the cigarette lighter by means of a continuous spirally shaped cord. Its total weight is of about 200 g (with the spirally shaped cord and its connector connecting it to the cigarette lighter of the car). In each one of the different versions, the equipment is perfectly compatible with the most recent mobile/pocket telephone sets.
This equipment eliminates all undesirable noises, Larsen effect, whistling sounds, buzzing and other background noises, it transmits and reproduces simply, accurately and with the same degree of quality, all the sounds which are received or emitted through the cellular telephone network to which it is connected.
The third embodiment illustrated in figures 5 and 6 of the telecom-munications equipment, which is the most sophisticated embodiment and which is also the preferred design, includes a mobile telephone 20 which can be placed on a support 21, connected by an extensible lead 22 to a plug 23, here the plug of a cigarette lighter, making it possible to connect it electrically to a source of electric energy either direc-tly, in the case of the cigarette lighter of a vehicle being used, or via a transformer in the case of a connection to an electric network.
The support 21 can include means for fastening the same to the dashboard of a vehicle or a conference table. It includes conventional electric connections or contacts, cooperating with those of the mobile telephone 20, which can be plugged into the mobile telephone, to pro-vide for the functions of charging the battery of the mobile telephone 20 and switching off of the incorporated loudspeaker and the micro-phone, which are replaced by a loudspeaker 24 and two microphones 25, 26 mounted in said support 21, when the mobile telephone 20 is placed on the support 21.
The geometrical and/or spatial positioning of the microphones 25, 26 with respect to the loudspeaker 24 is critical. A symmetrical arran-gement is essential to ensure a transmission of the audio signals of the loudspeaker 24 to each microphone with an intensity substantially identical .
The microphones 25, 26 are furthermore positioned or designed in such a manner as to receive the sounds from their surrounding in a di-rectional or selective manner, the microphone 25 being mucll more sensi-tive to sollnds coming from the lert of the support, whereas the micro-r)hone 26 is mllCIl morc sensitive to the sol~n(ls coming from the right hnnd sidc Or the slll-port 2l.
Tl~c clcctrollic circuit Or this thircl em(~odimellt is illustrntecl schelnatically in figure 6.
The two microphones 25, 26 are connected to the terminals Ml~, M1-and M2~, M2-, whereas the terminals FL3, FL4, FL6, Bat~ and Bat- are connected to the support contacts 21 designed for cooperating with the contacts of the mobile telephone 20, when the same is placed on the support 21.
One can see that the signals of the microphones 25, 26 are fed to the inputs of a differential amplifier IC4A; LM833N, of which the out-put signal corresponds to the difference in the signals output by the microphones 25, 26.
Thus, when these microphones 25, 26 are stressed by the loudspeaker 24, their output signals substantially cancel each other since they are positioned symmetrically with respect to this loudspeaker 24. However, when they deliver signals originating from the user of the telephone, who is never centrally positioned with respect to the support 21, the difference between the signals of the microphones 25, 26 produces a si-gnal of a sufficient value for the functioning of the telephone equipment.
Thus, through the symmetrical disposition of the two microphones with respect to the loudspeaker and the use of a differential ampli-fier, substantially all the problems of oscillations parasites and Larsen effect are eliminated in a manner which is simple, intelligent and effective.
The functioning of this third embodiment is as follows:
Upon insertion of the mobile telephone 20 in the support 21, a switch designed for this purpose causes the switching on of the louds-peaker 24 and of the external microphones 25, 26. A fast charger is al-so switched on and allows the charging of the battery included in the mobile telephone, if necessary. Circuits which form part of the elec-tronics of the system adjust the voltages necessary for the proper functioning of said electronics. To facilitate the description Or the device, one should consider the three principal parts:
1. Receiver circuit of the partner:
The signal produced by the mobile telephone 20 corresponding to the message being received is brought through appropriate connections to the circuit IC5, which is an important component. The main function of this component is to prevent that the loop, including the microphones of the device, the transmission circuit of tlle signals of the user, the receiver circuit of the partner as well as his loudspeaker, followed by the microphone of this same partner and all the circuits up to the loudspeaker of the user of the device, starts oscillating (oscillations parasites or Larsen effect) when the overall gain of the loop described reaches a sufficient value. After processing and after an amplification carried out by the circuit IC3, this signal is used for actuating the loudspeaker HP, which will produce an audio output which is adequate for the intended purpose.
2. Circuit for processing signals:
To describe the functioning of this circuit, one must consider that the device can be, at any given time, in one of the three following states:
a) transmission (the user is talking) b) reception (the partner is talking) c) standby (neither the partner, nor the user is speaking) To each one of these states will correspond certain internal condi-tions in the processing circuit. To simplify, the amplification of the microphones will be maximum during the state of transmission; to this maximum gain of the microphones will correspond a minimum amplification of the loudspeaker for the corresponding signal. In the same manner, when the device is in the reception state, the amplification of the si-gnal of the partner will be maximum at this loudspeaker and to this maximum gain at the loudspeaker will corlespond a minimum amplification of the signal of the microphones of the user. In the standby state, in-termediate amplification levels are defined, again for the purpose of preventing oscillations parasites or the Larsen effect.
The use of two microphones mounted symmetrically with respect to the loudspeaker, as well as with respect to the front face of the de-vice, provides several advantages in this mode of utilisation:
1) The acoustic signals transmitted by the loudspeaker will be re-ceived in a manner substantially identical by each microphone. A diffe-rential preamplifier makes it possible to attenuate, if not to elimi-nate, the common component arriving from the loudspeaker, which results in a significant decrease of the signal which would have produced amongst others, oscillations parasites.
2) A certain attenuation of the ambient noise is equally obtained in this manner.
3) Owing to the position of microphones, the utilization by the front seat passengers will be perfect.
4) The equipment can be used indifferently in a vehicle with a steering wheel on the right hand side or on the left hand side, without any modification.
Claims (6)
1. A telecommunication equipment including a pocket radiotelephone (20). a device for power supplying and a hands free device for this ra-diotelephone, as well as an electric cable (22) connecting the power supply device to a low voltage power supply plug (23), characterized in that it further includes a support (21) for the radiotelephone (20) into which the latter can be plugged for connection to the power supply device contained in this support (21) and in that this support further includes the "hands free" device formed by an electric circuit contai-ned in the support, a loud speaker (24) and two microphones (25, 26) po-sitioned symetrically with respect to this loudspeaker (24).
2. An equipment according to claim 1, characterized in that the power supply plug is of the cigarette lighter type.
3. An equipment according to claim 1 or claim 2, characterized in that the plugging in of the radiotelephone produces the switching off of its loudspeaker and of its own microphone and the switching on of the loudspeaker (24) and of the auxiliary microphones (25, 26) mounted in the support (21).
4. An equipment according to one of claims 1 to 3, characterized in that the support (21) includes a loudspeaker (24) and two microphones (25, 26) arranged symmetrically with respect to the loudspeaker (24) and with respect to the front face of the support (21).
5. An equipment according to claim 4, characterized in that the si-gnals output by the microphones (25, 26) are fed to the inputs of a differential amplifier of which the output signal is used as the "ml-crophone" signal.
6. An equipment according to claim 5, characterized in that the micro-phones are directional .
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CH78893 | 1993-03-16 | ||
| CH788/93-8 | 1993-03-16 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CA2158481A1 true CA2158481A1 (en) | 1994-09-29 |
Family
ID=4195204
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CA002158481A Abandoned CA2158481A1 (en) | 1993-03-16 | 1994-03-15 | Mobile communications equipment |
Country Status (6)
| Country | Link |
|---|---|
| EP (1) | EP0691051A1 (en) |
| JP (1) | JPH08508147A (en) |
| AU (1) | AU6155894A (en) |
| CA (1) | CA2158481A1 (en) |
| FI (1) | FI954349A (en) |
| WO (1) | WO1994022234A1 (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE19850044C2 (en) * | 1998-10-30 | 2003-06-12 | Cullmann Gmbh | Mobile phone holder for a vehicle |
Families Citing this family (14)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| FI107002B (en) * | 1994-01-13 | 2001-05-15 | Nokia Mobile Phones Ltd | Hands free or HF device for mobile phone |
| GB2296157A (en) * | 1994-12-16 | 1996-06-19 | Tcc Ind Inc | Multifunction hands-free cellular telephone adaptor |
| DE59602730D1 (en) | 1995-06-23 | 1999-09-16 | Andreas Peiker | TELEPHONE DEVICE WITH A HANDSET HAVING A TALK AND / OR EARSHELL |
| JP3022876U (en) * | 1995-08-14 | 1996-04-02 | 怡利電子工業股▲ぶん▼有限公司 | Freehand calling system for mobile phones |
| DE29520231U1 (en) * | 1995-12-20 | 1996-02-08 | Martin Dawes Telecommunication | Adapter cable |
| US5732361A (en) * | 1996-09-18 | 1998-03-24 | Liu; Chun-Chieh | Adapter for mobile phone |
| AUPO615997A0 (en) * | 1997-04-11 | 1997-05-08 | Jin, Chew Moh | Telephone adaptor apparatus |
| US5991646A (en) * | 1997-10-08 | 1999-11-23 | Sony Corporation | Articulating speaker and microphone for a wireless telephone with cigarette lighter adapter |
| US6173195B1 (en) * | 1997-10-27 | 2001-01-09 | Chi-An Chen | Wireless mobile telephone adapter for automobiles |
| US6058184A (en) * | 1997-12-17 | 2000-05-02 | Sony Corporation Of Japan | Speaker unit with boom microphone |
| US6138041A (en) * | 1998-09-23 | 2000-10-24 | Ccm Cellular Connection Of Miami, Inc. | Device for safe use of a portable cellular telephone while driving |
| FR2806564B1 (en) * | 2000-03-14 | 2002-08-09 | Sagem | MOBILE TELEPHONE WITH MULTIFUNCTION CONNECTOR |
| US6687513B1 (en) * | 2002-10-30 | 2004-02-03 | Hsiu-Chu Hsu Li | Device for attaching portable phones to vehicle |
| US8355515B2 (en) | 2008-04-07 | 2013-01-15 | Sony Computer Entertainment Inc. | Gaming headset and charging method |
Family Cites Families (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4325142A (en) * | 1980-07-25 | 1982-04-13 | Nippon Electric Co., Ltd. | Portable radio set with a carrying holder |
| JP2883082B2 (en) * | 1986-05-29 | 1999-04-19 | 三菱自動車工業株式会社 | Microphone device for hands-free car phone |
| JPH03117148A (en) * | 1989-09-29 | 1991-05-17 | Fujitsu Ltd | Loudspeaker telephone set |
| GB2245437A (en) * | 1990-06-18 | 1992-01-02 | Nodic Matsumoto Progress | Power supply for energising a portable telephone from a vehicle battery |
| US5444867A (en) * | 1991-01-11 | 1995-08-22 | Kabushiki Kaisha Toshiba | Adapter unit for adaptively supplying a portable radio telephone with power |
| WO1992014328A1 (en) * | 1991-02-05 | 1992-08-20 | Profinor Sa | Telecommunication equipment |
-
1994
- 1994-03-15 CA CA002158481A patent/CA2158481A1/en not_active Abandoned
- 1994-03-15 AU AU61558/94A patent/AU6155894A/en not_active Abandoned
- 1994-03-15 JP JP6520849A patent/JPH08508147A/en active Pending
- 1994-03-15 EP EP94908477A patent/EP0691051A1/en not_active Withdrawn
- 1994-03-15 WO PCT/IB1994/000041 patent/WO1994022234A1/en not_active Application Discontinuation
-
1995
- 1995-09-15 FI FI954349A patent/FI954349A/en not_active Application Discontinuation
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE19850044C2 (en) * | 1998-10-30 | 2003-06-12 | Cullmann Gmbh | Mobile phone holder for a vehicle |
Also Published As
| Publication number | Publication date |
|---|---|
| FI954349A (en) | 1995-11-15 |
| JPH08508147A (en) | 1996-08-27 |
| EP0691051A1 (en) | 1996-01-10 |
| FI954349A0 (en) | 1995-09-15 |
| AU6155894A (en) | 1994-10-11 |
| WO1994022234A1 (en) | 1994-09-29 |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| FZDE | Discontinued | ||
| FZDE | Discontinued |
Effective date: 19980316 |