US3819871A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Telephone switching and intercom equipment
Assignee: Electronique Appliquee SA
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Filing: 1972-05-30
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Granted: 1974-06-25
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Expires: 1992-05-30
Abstract
Abstract A telephone switching and intercom equipment comprises an operator''s position and a plurality of subsidiary positions. Each position is provided with a direct position selection key-board including for at least some of the positions, an external line access request key. Each actuation of a request key temporarily opens the conversation line of the position and activates, in a call marker device, a called position marking output, or an external line request marking output. The conversation line of each position is connected to a call marker connecting circuit responsive to a closure of the line, a temporary opening thereof and the activation of a call marker output to which it is connected. A single one of a plurality of intercom connecting circuits is active, at any time, for authorizing the control from the call marker connecting circuits of as many intercom routing blocks connected thereto as there are positions. A plurality of external line connecting circuits are so chained that the first unoccupied one reached by an external line request is active for authorizing the control from the said marker connecting circuits of as many external line access blocks connected thereto as there are positions. Each position is provided with a visual display of the occupancy conditions of the positions and a total occupancy of the external lines.
Inventors
- 👤 R Verdon
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 21:56
CPC Classifications
H; H04; H04M; H04M9/00; H04M9/002; H04M9/005
Claims Analysis
Total Claims: 14
Claim 1
Independent Claim
639 words
A telephone switching and intercom equipment comprising an operator''s position and a plurality of subsidiary positions, intercom position connecting circuits each having a conversation line extension selectively connectable to the position conversation lines and external line connecting circuits each having direct accessing to and from the operator''s position and each having direct accessing from subsidiary positions through conversation line extensions selEctively connectable to the position conversation lines; each position being provided with hook controlled work contacts for closure of the conversation line of the position and subsidiary positions being provided with external line connection dialing means; said operator''s position being provided with keyboard actuated facilities for direct position selections, external line selections and temporary holdings of communications from the external line, wherein: each subsidiary position comprises keyboard actuated facilities for intercom direct position selections and at least part of said positions are each provided with an external line connecting circuit request key, each direct position selection key and each external line connecting circuit request key having a work contact temporarily opening the conversation line of the position, a call marker device connected to all the direct position selection keys of the positions and having as many outputs as are positions respectively activated responsive to selective activations of the input connections thereof, as many call marker connecting circuits as there are positions each connected to an output of the call marker device and to a conversation line of the position corresponding to said output, each of the said circuits comprises a first output responsive to the closure of the conversation line, a second output responsive to a temporary opening of the conversation line from the actuation of a key at the position, a third output responsive to the activation of the output of the call marker device connected to the circuit and a further output responsive to the activation of the said call marker output and controlling actuation of a buzzer at the position of the conversation line to which said circuit is connected, each intercom position connecting circuit comprising as many communication routing blocks as there are positions, through each of which passes the conversation line of a position and passes the conversation line extension of an intercom relay circuit wherein the conductors of the conversation line extension pass through balanced coils of a pair of relays, each communication routing block comprising electronic switches across the conversation line and the conversation line extension thereof and a control gate circuit arrangement of said electronic switches, said control gate circuit arrangement having selection control inputs respectively connected to the said first, second and third outputs of the call marker connecting device of the position the conversation line of which passes through the block and having unblocking inputs and activation marking outputs, and said intercom relay circuit comprising a two-condition member, a first condition of which marks availability of the conversation line extension thereof and a second condition marking the unavailability of the intercom relay circuit, and having an output activated in the first condition thereof and connected to the unblocking inputs of the communication routing blocks of the intercom position connecting circuit, said intercom relay circuit comprising means responsive to the activation of an output in one of the communication routing blocks of the intercom position connecting circuit for controlling said two-condition member to its second condition, the said two-condition members being interconnected in a chaining arrangement wherein a single one of the said members can be in the said first condition thereof, and, each communication routing block activation marking output controls in the intercom relay means, a circuit applying an authorization voltage to all the inputs of the communication routing blocks up to the actuation of the relay SB marking the establishment of a communication between two positions through their respective communication routing blocks of the intercom position connecting circuit.
Claim 2
Dependent Claim
639 words
A telephone switching and intercom equipment comprising an operator''s position and a plurality of subsidiary positions, intercom position connecting circuits each having a conversation line extension selectively connectable to the position conversation lines and external line connecting circuits each having direct accessing to and from the operator''s position and each having direct accessing from subsidiary positions through conversation line extensions selEctively connectable to the position conversation lines; each position being provided with hook controlled work contacts for closure of the conversation line of the position and subsidiary positions being provided with external line connection dialing means; said operator''s position being provided with keyboard actuated facilities for direct position selections, external line selections and temporary holdings of communications from the external line, wherein: each subsidiary position comprises keyboard actuated facilities for intercom direct position selections and at least part of said positions are each provided with an external line connecting circuit request key, each direct position selection key and each external line connecting circuit request key having a work contact temporarily opening the conversation line of the position, a call marker device connected to all the direct position selection keys of the positions and having as many outputs as are positions respectively activated responsive to selective activations of the input connections thereof, as many call marker connecting circuits as there are positions each connected to an output of the call marker device and to a conversation line of the position corresponding to said output, each of the said circuits comprises a first output responsive to the closure of the conversation line, a second output responsive to a temporary opening of the conversation line from the actuation of a key at the position, a third output responsive to the activation of the output of the call marker device connected to the circuit and a further output responsive to the activation of the said call marker output and controlling actuation of a buzzer at the position of the conversation line to which said circuit is connected, each intercom position connecting circuit comprising as many communication routing blocks as there are positions, through each of which passes the conversation line of a position and passes the conversation line extension of an intercom relay circuit wherein the conductors of the conversation line extension pass through balanced coils of a pair of relays, each communication routing block comprising electronic switches across the conversation line and the conversation line extension thereof and a control gate circuit arrangement of said electronic switches, said control gate circuit arrangement having selection control inputs respectively connected to the said first, second and third outputs of the call marker connecting device of the position the conversation line of which passes through the block and having unblocking inputs and activation marking outputs, and said intercom relay circuit comprising a two-condition member, a first condition of which marks availability of the conversation line extension thereof and a second condition marking the unavailability of the intercom relay circuit, and having an output activated in the first condition thereof and connected to the unblocking inputs of the communication routing blocks of the intercom position connecting circuit, said intercom relay circuit comprising means responsive to the activation of an output in one of the communication routing blocks of the intercom position connecting circuit for controlling said two-condition member to its second condition, the said two-condition members being interconnected in a chaining arrangement wherein a single one of the said members can be in the said first condition thereof, and, each communication routing block activation marking output controls in the intercom relay means, a circuit applying an authorization voltage to all the inputs of the communication routing blocks up to the actuation of the relay SB marking the establishment of a communication between two positions through their respective communication routing blocks of the intercom position connecting circuit.
Claim 3
Dependent Claim
322 words
A telephone switching and intercom equipment according to claim 1, wherein: the external line connecting circuit request keys are connected to the call marker device for responsive activation of an output therof, each external line connecting circuit comprises a two-condition request input circuit, a first condition of which marks availability of the external line connecting circuit and the second condition of which marks unavailability of the said circuit, and said two-condition request input circuits are connected in a chained arrangement the input of which is connected to the said output of the call marker device, wherein each request input circuit interrupts the chain when in its first condition and extends the chain to the next request input circuit when in its second condition, each external line connecting circuit comprises as many external line access blocks as there are positions provided with an external line connecting circuit request key, the respective conversation lines of which pass through said blocks, each of said blocks having a conversation extension line passing therethrough and electronic switches connected across said conversation line extension and said conversation line and comprising a control gate arrangement for said switches having selection control inputs respectively connected to the outputs of the call marker connecting circuit to which the said conversation line is connected and having an unblocking input controlled from the said two-condition request input of the external line connecting circuit, and each external line connecting circuit comprises an external communication relay circuit wherein the conductors of the said conversation line extension pass through balanced coils of a pair of relays, wherein an output of the said two-condition request input is connected to an actuation circuit of an occupancy marking relay of the external line connecting circuit, work contacts of which connect the external line to the conversation line extension of the circuit, and further controls actuation of an external line call marking relay of the said external communication relay circuit.
Claim 4
Dependent Claim
237 words
A telephone switching and intercom equipment according to claim 2, wherein: the said two-condition members chaining arrangement of the intercom position connecting circuits is provided with a disabling input the activation of which blocks the availability marking two-condition member thereof, each two-condition input request circuit of the external line connecting circuits comprises a contact of one of the relays through which passes the conversation extension line of the said connecting circuit, said one relay being de-actuated responsive to the opening of a conversation line in an external line access block through which extends said conversation line extension, each external line access block comprises circuit means unblocked in activated condition of the block, responsive to an activation of the output of the call marker connecting circuit to which is connected the conversation line of said block, and having an input connected to a control input of the external communication relay means to which it is connected, said external communication relay means comprises a circuit responsive to the activation of the said control input for activating an output lead connected to the said disabling input of the two-condition member chaining arrangement of the intercom position connecting circuits and further controlling the actuation of an external line connection holding relay which relay is provided with a self-sustaining circuit including a member which is conducting in the first condition of the two-condition input request circuit of said external communication relay means.
Claim 5
Dependent Claim
160 words
A telephone switching and intercom equipment according to claim 2, wherein: an occupancy marker device comprises as many two-condition members as there are positions in the equipment, each of the said members having a multiple output lead, each position comprises as many two-condition visual display members as are positions, each having a control input connected to a corresponDing one of the said multiple output leads of the occupancy marker device, each call marker connecting circuit comprises an output connected to one of the said two-condition members of the occupancy marker device and each such output is activated in response to the activation of the third output of said circuit, each intercom communication routing block and each external line access block comprises a circuit detecting establishment of a communication with the position to which it is connected and having an output connected to the said output of the call marker connecting circuit connected to the same conversation line as the block.
Claim 6
Dependent Claim
34 words
A telephone switching and intercom equipment according to claim 4, wherein: each two-condition visual display member is a lamp contained within the casing of the key of the position to which it is allotted.
Claim 7
Dependent Claim
121 words
A telephone switching and intercom equipment according to claim 4, wherein: each subsidiary position is provided with an external connecting circuit request key, comprises a further two-condition visual display member having a control input, each external communication relay means has a further output lead activated from a work contact of the occupancy marking relay thereof, and, the occupancy marker device comprises a two-condition member responsive to an AND-condition of the said further output leads from said external communication relay means and having a multipled output to all the control inputs of the visual display members through individual connections each passing through a member of the corresponding call marker connecting circuit which breaks said connection in an unactivated condition of said circuit.
Claim 8
Dependent Claim
360 words
A telephone switching and intercom equipment according to claim 6 wherein: each external line selection key of the operator''s position has a two-condition visual display member and each external line holding key of the operator''s position has a two condition visual display member, actuation of an external line selection key unblocks a switch in the external communication relay means and the output of said switch is connected to the second output of the call marker connecting circuit of the operator''s position and the input lead from said key in said external communication relay means is connected to the external line access block unblocking output for enabling selection of the access block of the operator''s position from which through a return lead to the external communication relay means the actuation circuit of the occupancy marking relay is energized, a contact of said relay blocking the two-condition request input circuit of the external communication relay means, in each external line access block through which passes the operator''s position conversation line, an output lead is activated from activation of a member marking an activated condition of said block and said lead is connected in the corresponding external communication relay means to a switch the output of which is connected to an output lead to the corresponding two-condition visual display member at the operator''s position, in each external communication relay means the actuation of an incoming call marking relay controls at a work contact thereof the activation at the operator''s position of the two-condition visual display member corresponding to the external line connecting circuit, actuation of an external line holding key at the operator''s position activates, through the said output lead of the external line access block, a circuit controlling application of a pulsed current to the two-condition visual display member associated with the said external line holding key and also activates directly the external line holding relay of the external communication relay means, a work contact of which also applies the said pulsed current to the two-condition visual display member associated with the external line selection key of the external line connecting circuit of which said relay meanS and access block are parts.
Claim 9
Dependent Claim
305 words
A telephone switching and intercom equipment according to claim 2, wherein: said call marker device is connected to incoming leads from said operations and subsidiary positions, each key of each keyboard of a subsidiary position and each direct position selection key of the operator''s position keyboard controls first and second contacts selectively connected to said incoming leads according to a recurrent distribution of connections through oppositely directed unidirectional elements, one/half of the keys in each keyboard having a contact opening one of the conversation line conductors of the positions and the other half of the keys in each keyboard having a contact opening the other conductor of the conversation line, each call marker connecting circuit comprises means to which are respectively connected the conductors of the conversation line to which it is connected, and said means respectively activates first or second output leads to distinct control inputs of the call marker device, responsive to an opening of a conductor of the conversation line, said combination inputs of the call marker device comprise first and second sets of two-position members, each set having a number of members twice the number of the said incoming leads and having its members selectively connected to said leads through unidirectional elements of opposite directions from the first to the second set, one/half of the said two-position members in each of the sets having an activation input connected to one of the control inputs and the other hald of the said two-position members in each of the sets having an activation input connected to the second of the said control inputs, and the outputs of the said first and second sets are distributed in distinctive pairs, each of which constitutes an activation input of an electronic switch the output of which is connected to an output of said call marker device.
Claim 10
Dependent Claim
84 words
A telephone switching and intercom equipment according to claim 4, wherein: each multiple output lead of said occupancy marker device is connected through oppositely directed unidirectional elements to two of the said two-condition members, each one of the said two-condition visual display members of each position is connected to one of the said multiple output leads through a unidirectional element which is connected oppositely to a unidirectional element connecting another one of the said two-condition visual display members to the same multiple output lead.
Claim 11
Dependent Claim
163 words
A telephone switching and intercom equipment according to claim 8, wherein: each contact of a key which opens a conversation line conductor applies an A.C. electrical current to said conductor, the conversation line conductors are each connected in the call marker connecting circuit to a resistor the other end of which is connected to an output lead to said call marker device and across which is connected a bridge rectifier controlling from its D.C. output, across which a condenser is connected, an electronic switch having an output connected to the said second output of the call marker connecting circuit and having a further output to a lead connected, in each and all the call marker connecting circuits of the equipment to the actuation ciruit of a relay, work contacts of which connect the conductors of the conversation line in a circuit responsive to the opening of the said conversation line for activation of the said first output of the call marker connecting device.
Claim 12
Dependent Claim
130 words
A telephone switching and intercom equipment according to claim 2, wherein: the conversation line of said operator''s position extends as conductors through all the call marker connecting circuits of said subsidiary positions, the second output of said call marker connecting circuit of the operator''s position is connected to a lead extending through all the call marker connecting circuits of said subsidiary positions, in each call marker connecting circuit oF a subsidiary position, electronic switches are connected across the conductors of the conversation line of the position and the conductors and an input activating gate of said switches comprises a control input connected to the said lead and a further control input connected to a member activated from the call marker device output connected to the said call marker connecting circuit.
Claim 13
Dependent Claim
38 words
A telephone switching and intercom equipment according to claim 11, wherein: an interrupted current lead extends through all the call marker connecting circuits of the subsidiary positions and is connected to an input of the said electronic switches.
Claim 14
Dependent Claim
130 words
A telephone switching and intercom equipment according to claim 2 wherein: each of the pair of relays of said intercom relay circuits and of said external communication relay circuit comprises first and second balanced coils in each relay thereof, the first coils of the said pair of relays being respectively connected to conductors of said conversation line extension, and the second coils of the said pair of relays are connected to a conductor of said conversation line extension and to a battery supply, the conversation line extension conductors are interconnected by a resistance condenser network, the resistance member of which is shunted by a work contact of the corresponding relay of the pair, and the second coils of said pair of relays are connected to ground through a gating circuit.
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1977-06-24 | 1977-12-24 | 1978-06-25 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1981-06-24 | 1981-12-24 | 1982-06-25 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1985-06-24 | 1985-12-24 | 1986-06-25 | $7700.00 | Window Closed / Lapsed |