US305907A

US305907A - Bette b

Info

Publication number: US305907A
Authority: US
Publication date: 1884-09-30
Anticipated expiration: 1901-09-30

Description

(No Model.

B. EQJ. EILS.

QUADRUPLEX TELEGRAPH.

Patented Sept. 30, 1884.

N PETERs wnwn wo. mt.

rricm BETTE E. J. EILS, OF WASHINGTON, DISTRICT OF COLUMBIA.

QUADRUPLEXTELEGRAPH.

LL LJOIFICATION' forming part of Letters Patent No. 305,907, dated September 30, 1884.

Application filed February 19, 1884. No model.)

' To all whom it may concern:

Be it known that I, BETTE E. J. EILs, a citizen of the United States, residing at Wash- 'ington, in the District of Columbia, have in vented certain new and useful Improvements in Quadruplex Telegraphs; and I do hereby declare the following to be a full, clear, and exact description of the invention, such as will enable others skilled'in the art to which itappertains to make and use the same.

This invention was primarily designed to adapt the invention described in my application forUnited States Letters Patent, filed January 28, 1884, Serial N 0. 118,999, for use on the neutral side of such diplex or quadruplex or multiplex telegraphs in which one message is received t-hi ough a neutral relay subject to rise and fall of tension as well as to reversals of a normal line-current, and where the static dis charge of the line or any other cause increases the period of momentary demagnetization of such relay during the reversals of the linecurrent to such an extent that the invention described in my aforesaid application cannot wholly bridge over such lengthened period of demagnetization.

My improvement consists in employing as part of the second local branch used for discharging the soundermagnet at the termination of each signal, as described in my afore said application, the frontcontuct-screw and armature-lever of a subsidiary neutral relay in the linecircuit, the said armature-lever of which is held against the said front contactscrew under all line-currents, but is momentarily retracted during. reversals of lhe linecurrent, so as to break said branch during the period of demagnetization of the neutral receiving-relay, and thus prevent the discharge of the sounder electromaguet at times when a reversal occurs while the sounder is making a signal. 7

The annexed drawing is a diagram illustrating the embodiment of my improvement in the well-known diplex telegraph, where one message is transmitted by rise and fall of tension of a normal line-current and received through a neutral receivingrelay, NR, and- My invention differs from the previouslyknown dipleX telegraph of this character solely in the organization of the local circuit of the neutral receiving-relay, and further description may be confined to this new organization, because the general construction and mode of operation of the diplex telegraph illustrated will be readily understood from the diagram by any oneskilled in the art.

The relay NR has a front contactscrew, a", and a back contact-screw, at, which contactscrews are insulated from each other, and between which thearmature-lever a of the relay plays, said lever being normally held against the back contact-screw, a, by its retractile spring, the tension of which overcomes the magnetic attraction of the armature by the relay-magnet due to the weak normal line current. One pole of local battery LB is connected by wire 1 with the front contactscrew, to, of this relay. The other pole of said battery is connected by wire 2 to one end of helix sof the sounder S, the other end of which helix is connected by wire 3 to armature-lever a. of the relay. The armature-lever b of the sounder plays between the insulated back stop, b, and the front contact-screw, b", and is connetted by wire 4 with wire 1 at post 5. Front contact-screw, b", of the sounder is connected by wire 6 with wire 3 at post 7. The soundermagnet is wound with a second helix, 5, one end of which is connected by wire 8 with wire 2 at post 9, while the other end is connected by wire 10 with the armaturelever c of the subsidiary neutral relay SR, which is included in the line-circuit. The front contact-screw, c, of this subsidiary relay is connected by wire 11 with the back contact screw, (1?, of the receiving -re1ay HR. The subsidiary neutral relay is so adjustedthat its armature-lever 0 will be held against the front contact-screw, 0, under all line-currents, and will be retracted by its retractile spring only when the line current vanishes, momentarily, during reversals. The helices s and s are wound on the core in opposite directions, and are of equal capacity, so that the sounder-magnet is what is usually termed a differential electro-magnet.

It will be observed that the sounder-magnet cannot be discharged unless the armature-lever 0 of the subsidiary neutral relay SR is in consequently the sounder-magnet cannot be discharged, but continues the signal. It will also be observed that the momentary retractions of armature-lever c at reversals when relay NR is not receiving have no injurious effeet on the local circuit of said relay.

The use of helix 8 provides for a prompt discharge of the sounderanagnet; but said helix and wire 10 may be omitted, as illustrated in my aforesaid application, and post 9 connected by wire 8 to armaturelever 0, so as to merely shunt the local current around the helix 8.

I do not limitmyself to the herein-described special use of my invention. For instance, the subsidiary neutral relay may be used in connection with the local arrangement shown in United States Patent No. 274,112, for controlling the local branch connected with the back contact-screw of the receiving-relay.

I believe the feature of controlling a local branch by a subsidiary relay in the main-line circuit to be entirely new, and my first claim is designed to cover this feature as broadly as is possible within legal bounds. I claim as my invention 1. The combination, substantially as before v set forth, of a receiving-relay, a local circuit controlled thereby, a local branch for said local circuit, and a subsidiary relay in the main-line circuit for controlling said local branch.

2. The combination, substantially as before set forth, of a neutral receivingrelay subject to rise and fall of tension as well as to rever- B. E. J. EILS.

IVitnesses:

O. A. N EALE, E. T. WVALKER.