US1245507A - Telegraph system. - Google Patents

Description

i. M. RAINEY.

TELEGRAPH SYSTEM.

APPLICATION FILED APR..22. 1915'.

, 5? Patmfied NW. 6, 191?.

M veniwt' Paul M fiamey UNITED STATES PATENT oEEIcE.

PAUL M. RAINEY, 0F GLEN RIDGE, NEW JERSEY, ASSIGNOR, BY MESNE ASSIGNMENTS, TO WESTERN ELECTRIC COMPANY, INCORPORATED, A CORPORATION OF NEW YORK.

TELEGRAPH SYSTEM.

Specification of Letters Patent.

Patented Nov. 6, 191 '7.

Application filed April 22, 1915. Serial No. 23,049.

To all whom it may concern Be it known that I,- PAUL M. RAINEY, a citizen of the United States, residing at Glen Ridge, in the county of Essex and State of New Jersey, have invented certain new and useful Improvements in Telegraph Systoms, of which the following is a full, clear, concise, and exact description.

This invention relates to telegraph systems, and its principal object is to provide a simple arrangement for the relaying or retransmission of current impulses.

In operating telegraph systems on the well-known Baudot multiplex principle, it has been recognized for some time that it is possible to send messages from one station to another through an intermediate station without the necessity for any manual manipulation at the intermediate point, and without interfering with other messages between the intermediate station and either terminal station over the same transmission lines. This method of operation, often aptly designated as forking or extending, is clearly described in H. \V. Pendrys The Bauclot Printing Telegraph System, and the principal object of this invention is to improve the system and apparatus therein disclosed. This invention may, however, be advantageously employed, where desired, in simply relaying the impulses from one section of line to another, and while it is particularly adapted for use in multiplex operation, it is clearly not limited to this field.

For the accomplishment of the above ends, the invention contemplates a system of relays and connections interposed between sections or branches of a transmission line, whereby each current impulse received may act upon a particular unit of the system, which unit controls the character of the corresponding impulse in the next section or branch, besides bringing about a circuit condition which maintains the units in their altered condition until a train of impulses representing a cycle of operations is completed.

The above and other objects of this invention will be fully set forth in the following description and claims and will be more readily understood by reference to the accompanying drawing wherein the preferred embodiment is shown diagrammatically.

A transmission line section 5 interconnects one distant'station with an intermediate or retransmitting station A, while another section 6 interconnects the intermediate station with another distant station. The apparatus at the two distant stations is not shown since it may be of any desired type.

At the intermediate station A, the current impulses in section 5 traverse a relay 10 whose armature is connected to a grounded source of energy 11. The active front contact of relay 10 is joined to the rotating arm 12 of a suitable receiving current distributer 13. This distributer may be composed of any number of groups of contacts. each group comprising a plurality of insulated segments such as 15, 16, 17, 18 and 19, in the drawing four such groups being shown. Only the group associated with the retransmission of signals,,however, is shown connected, the other groups being preferably associated with printing apparatus to convert the proper impulses in section 5 into printed characters.

Segments 15 to 19 inclusive are each connected to one of the terminals of the windings of a group of relays 25, 26, 27, 28 and 29 respectively, the other terminals of which are connected to a back contact of a .clearout relay 31. Each relay 25 to 29 inclusive is provided with two armatures 32 and 33. Armatures 32 cooperate with back and front contacts, respectively connected to the positive and negative poles of a divided and grounded source of energy 34 and are connected to corresponding insulated segments 35, 36, 37, 38 and 39 of a transmitting current distributer 40. Armatures 33 of relays 25 to 29 cooperate with front. contacts associated with the windings of the respective relays and are all connected to a grounded source of energy 41. It is thus apparent. that whenany of the relays 25 to 29 inclusive are energized their armatures 33 complete holding circuits therefor through the armature of the clear-out relay 31.

Distributer 40 is provided with a rotating arm 15 adapted to successively-connect segments 35 to 39 inclusive to line section 6. There may be other groups of segments similar to segments 35 to 39 (in the drawing three other such groups being shown), which may be used for intercommunication between station A and the distant station on section 6.

the arm 12 rotates in the proper phase re-,

lation to a corresponding distributer, preferably of a similar construction, located at a sending station on line 5, and arm 45 rotates in the pro er phase relation to a corresponding, and preferably similar distributer, at a receiving station on line 6.

Arms 12 and 45 need not pass over corresponding segments in corresponding groups simultaneously, it merely being necessary that the selected relays 25 to 29 have sufiicient time to operate before the brush on arm 45 leaves the respectively corresponding segments 35 to 39. Preferably arm 12 may lead arm 45 slightly, as shown in the drawing.

Assumlng' that relay 10 is polarized so that its armature engages the active contact only when the positive impulses arrive over section 5, the operation of the system is as follows:

If the first impulse of a particular cornbination is of positive polarity, relay 10 causes its armature to complete a circuit from source 11, arm 12, segment 15, relay 25 and back contact and armature of relay 31 to ground. Relay 25 thereupon becomes energized, attracting its armatures 32 and '33 against their respective front contacts. Armature 32 connects the positive pole of the grounded source 34 to segment 35 and when arm 45 of distributer 40 reaches this segment the pole is joined to section 6. Armature 33 completes a holding circuit including grounded source 41, relay 25, and the back contact and armature of relay 31. Relay 25 is therefore locked in a condition to connect the positive pole of' source 34 with segment 35.

Assuming the second impulse in section 5 to be negative, relay 10 breaks the circuit includin -its armature and active contact and whi e arms 12 and 45 are respectively associated with segments 16 and 36, relay 26 remains unenergized and the negative pole of source 34 is connected through back contact and armature 32 of relay 26, segment 36 and arm 45 tosection 6. This action continues throughout the cycle of operations consisting of five impulses, whenever an impulse in section 5 is positive, the positive pole of source 34 being connected by the corresponding relay 25 to 29 inclusive with the out relay 31. Glear-out relay 31, thereupon pulling up its" armature, opens the holding circuits for the relays'25 to 29 which have been previously energized and the relaying apparatus is again in a condition to retransmit another set of impulses.

It is therefore readily apparent that the current impulses in section 5 associated with the group of segments connected to relay 25 to 29 inc usive are relayed or retransmitted to section 6. The impulses therefore associated with this group of segments may be relayed on through the intermediate station A to a distant station on section 6 without the necessity of any supervisory or manual operation at the intermediate station. On the other hand, the apparatus associated with the other three groups of segments of distributers 13 and 40 may be utilized for intercommunication between instruments associated with these groups and cotiperating apparatusassociated with corresponding groups of like distributers at the distant station on sections 5 and 6 without in any way interfering with the through transmission between such distant stations. If desired, relays 25 to 29 may be caused to control any desired form of local selecting apparatus as a printer or perforator.

While the distributors 13 and 40 have been referred to in the above description as receiving and transmittin distributers, respectively, it is to be un erstood that this term relates merely to the function of those groups of segments of these pieces of apparatus while working in connection with the relaying of message impulses between the sections of the through transmission line. Each distributer sofar as segments in the other quadrants are concerned, may act as 1 either a transmitting or receiving distributer, and when the system is properly du-' plexed, may operate as a sending and transmitting distributer, simultaneously.

What is claimed is:

1. A telegraph system comprising a line divided into sections; and a relaying apparatus interposed between adjacent sections thereof including a plurality of relays variably selectable by impulses received from one 129 of the sections, a source of energy for forming impulses for the next section, circuit connections therefor controlled by said relays, and holding circuits for said relays closed thereby in response to the impulses received. 180

2. A telegraph system for relaying signal current impulses comprising a telegraph line divided into sections; and a relaying apparatus interposed between adjacent sections including a current distributer associated with one section, a plurality of relays cooperating therewith to be selectively acted upon y a plurality of current impulses, holding circuits for said relays, a source of relaying current, a current distributer interposed between said source and another section of said line, and circuit connections whereby said relays control the cooperation of said source and said second mentioned distributer and complete the holding circuits for themselves in accordance with the current impulses in the first mentioned section.

3. A retransmitting apparatus comprising a receiving current distributer, a plurality of relays adapted to be selectively actuated by current impulses associated therewith, a transmitting current distributer, a source of currentadapted to cooperate with said transmitting distributer the cooperation being controlled by said relays, holding circuits for and controlled-by said relays, and means for discontinuing the action of said circuits.

In Witness-whereof, I hereunto subscribe my name this 21st day of April A. D., 1915.

PAUL M. RAIN EY.

Images