US82695A - Improvement in telegeaphic insteument - Google Patents

Description

S. F. DAY.

Telegraph Relay-Instrument.

Patented Oct-6, 1868.

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SAMUEL F. DAY, OF BALSTON SPA, NEW YORK.

Letters Patent No. 82,695, dated October 6, 1868.

IMPROVEMENT IN TBLEGRAPHIG INSTRUMENT.

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Specification of certain Improvements in Telegraphic Instruments inventedby SAMUEL F. DAY, of Balston Spa, in the county of Saratoga, and State of New York.

Nature and Object of the Invention.

This iuvention is designed to obviate the difiioulties which are now found in working telegraphic instru meats without local batteries, and also to furnish an instrument which can, when desired, be used as a repeater, as hereinafter more fully set forth.

In the Letters Patent granted to me, November 1, 1864, Ihave described an instrument which was designed to and does make the line of current available by changing the direction of the whole of said current, so as to make it pass alternately through the sounder and through the-short line around it. But .that invention, while it possessed material advantages, was nevertheless subject to the objection, that to accomplish said object in the manner there described, it was necessary to provide against the surging of the current by the introduction of delicate mechanism to continue the current in one direction till it was" absolutely broken in the other; and the liability of this delicate mechanism to disarrangemcnt, offered an obstacle, to a certain extent, to the use of that instrument. I

In the present invention the object of operating the sounder is accomplished by making a continuous circuit around the sounder through a resistance-coil of greater length thanthat of the magnets attached to the sounder, and transferring a portion, perhaps I should rather say the bulk, of the current through the sounder by means of a relay-instrument connected to it for that purpose:

My present invention also contains a provision for converting a sounder into a repeater, when it is desired to use it for that purpose, by so connecting the parts that while the relay is made to control the action-of the sounder, the sounder in turn is made to work the main line. Still another feature of this invention consists in the device, hereinafter described, for hanging and adjusting therelaymagnets so as to bring them at the proper distance from the relay-lever for the diii'erent purposes and in the dilierent operations desired. The details of description, which are necessary to a full understanding ofthe invention, are hereinafter more fully set forth.

Description of the accompanying Drawings.

Figure 1 is a side elevation of a telegraphic instrument embodying my improvements. Figure 2 is a plan of the some. Figure 3 is an under side view.

General Description.

A is the cast-iron bed-plate of the machine.

B is a board or piece of wood resting upon the bed A, and on which the relay is placed.

C is a board or piece of wood, upon which the sounder is placed, and which is also supported by the bed A.

D D are the magnets of relay-instrument.

is the armature of the same; and

F is the lever of the same.

This lever is kept up against the insulated pin a, by the ordinary springb except when drawn in the opposite direction by the force of the current, in which case it will be brought against the pin 0, and will then form a connection with the loop G of the relay. The adjustments of the vibrations of the relay-lever F are regulated in the same manner as in ordinary telegraphic instruments.

H is a raised brass plate, which rests on the board 0, to support the sounder, to which the sounder-posts I I are attached. These sounder-posts are, however, insulated from the plate H by India-rubber sockets, or

their equivalents.

J J are the sounder magnets, K the sounder-lever, and L the armature of the sounder.

An inspection of the drawings will make the construction of the parts plain, as most of the details not particularly described are substantially similar to those of instruments in ordinary use.

The line is connected with the instrument by attaching one part of the line to the screw-cup M, and the other part of the line to the screw-cup N. The wire d, from the foot of the screw-cup M, extends up through the board B, and connects to the magnets of the relay, through which-the current passes to the wire c, which connects with two wires,fand g, the former of which enters the coil or ball of magnet-wire O, which is connected by wire it to the switch-post z', from which point the direction of the current is controlled by the position of the switch-lever 1?.

When the-instrument has to be used as a repeater, the switch-lever P is turned to the left, in which case the current through the coil 0 will pass from theswitch-post 2, over the wire j, and up the post I, to the soundinglever K, down the post I, and along the wire it, to the screw-cup N, and then over-the line, thus completing the circuit, except while the lever K is making its upward stroke, whenthe connection in that direction will be broken.

If, however, the switch-lever is turned to the right, so as to connect with the switch-post z', the current through the coil then has a connection with the main line bypassing through the lever P, switch-post Z, wires m and k, and screw-cup N, where it connects with the main line.

g connects the lever F of the relay to the relay-magnets D,-and when the said lever F is so attached by the magnets D as to bring the said lever in contact with the pin a, the circuit is then closed through the relay-lever F and relay-loop G, which connects with the sounder-magnets by means of the wire 11, and they in turn are connected to the screw-cup N by the wires and k.

The relay-magnets are hung upon the shafts or stems Q, which are connected at one end by a cross-bar, B. These shafts Q are clamped between the pedestal S and the spring-cap T, which is held down upon them by the screw g. This arrangement holds said relay-magnets with sufiicient firmness, and at the same time allows them to be adjusted by the thumb-screw U to any desirable distance from the armature E.

Operation.

When it is desirable touse the instrument as a sounder, the switch-lever P is turned to the right, so as to connect the switch-post i with the switch-post Z.

The current then has a complete connection, through the relay-magnets, from one screw-cup to the other, as already shown by the previous description of the connections and the line which they form. But to make this circuit, it is compelled to pass through the resistance-coil O, which is longer by,considerable than the coils which form the sounder-magnets. The addition of this longer resistance-coil is an important treatment the instrument, for if this connection between the parts of the line were direct, or the resistance-coil were of less length than the sounder-magnets, it is easy to see that the current would always prefer this line because of its being shorter, even though the connection through the sounder-magnets should be closed, and consequently, without this resistance-coil, or its equivalent, the instrument would'not work with any efiiciency. Some other medium of resistance, however, might be used instead of the coil, such as a connection through acidulated water, or various other devices, which would offer a resistance to the current, but I prefer a coil of magnet-wire as the best.

The machine having been thus connected, and the tensions properly adjusted, when the key of the operator in the distant ofiice is closed, the lever F of the relay will, of course, be attracted by the current passing through the sounder-magnets till it is brought in contact with the insulated pin a ofthe relay-loop, which. closes the circuit through the sounder-magnets, the current then passing over the relay-lever F, down relay-loop G, from thence along the wire a to the sounder-magnets, from which it passes along the wiresp and k to the screw-cup N, and as the key of the said operator is again opened, the relay-lever will fall back into its natural position against the insulated pin a, and this connection through the magnets of the sounder will be opened or cut off. The result is that, when the circuit is thus closed through the sounder-magnets, a greater portion of the current will take this direction because of its being the shorter line, thus giving ample power to work the sounder, as the vibration of the relay-lever, when the key is opened, completely isolates the sounder-magnets from the line, and sends the whole current through the resistance-coil, thus leaving the sounder-lever perfectly free to rise.

When the instrument is to be used as a repeater, the switch-lever P should be turned to the left, as representcd in the drawings. In this case the short line of connection through the sounder-magnets, above described,

is retained when the relay-lever is attracted by the relay-magnets, but when the relay-lever falls back into its natural position, the current is compelled to take the direction through the resistance-coil, except when the sounder-lever is making its upward stroke, during which movement the connection is entirely broken, and by that means the sounder is made to perform the service of a repeater. The power of the action-of the relay may be regulated by adjusting the relay-magnets to a greater or less distance from the armature.

It is obvious that the construction of the resistance-coil, and in fact of several of the other parts, may be somewhat modified without changing the essential nature of the invention herein described, 'or the operation of the instrument; as, for example, the resistance-coil may be made in the same form as the sounder or relaymagnets represented in the accompanying drawings, and yet, the connection being preserveih-the machine remains substantially the same.

Claims. I claim, as my invention 1. The combination of a. relay, and sounder, and the resistance-coil O, or its equivalent, substantially as and to the effect hereinbefore set forth.

2. The arrangement of parts herein described, or its equivalenfg by which the sounder, while controlled by the relay, is also made to work the mainline as a. repeater, substantially as herein set forth.

3. The combination of the magnets D D, shafts Q Q, clamping-pieces S and T, and adjusting-screw U, or their equivalent, substantially as set forth.

SAML F. DAY.

Witnesses: LUCIUS W. How,

THos. P. How.

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