US629645A - Telegraph-sounder. - Google Patents

Description

No. 629,645. Patented July 25, I899.

' J. S. BAYNARD.

TELEGRAPH SUUNDER.

(Application filed Apr. 22, 1898.)

(Nu'lIodeL) A 77'0HNE Y S.

WITNESSES iiwrrnn ST TES PATENT @rrrcm JAMES SWINTON BA YNARD, OF NEW YORK, N. Y., ASSIGNOR TO REUBEN L. PRITCHARD, OF SAME PLACE.

TELEGRAPH-seminars;

SPECIFICATION forming part of Letters Patent No. 629,645, dated July 25, 1899.

Application filed April 22, 1898.

To 11/] 10/1/1111. it Hwy I'UILUII'IL;

lie it known that 1, JAMES SwmToN BAY- NARD, of the city of New York, borough of Manhattan, in the county and State of New York, have invented certain new and useful Improvements in Telegraph Sounders, of which the following is a full, clear, and exact description.

The invention relates to telegraph-sounders such as shown and described in the Letters Patent of the United States No. 357,789, granted to R. C. Rutherford on February 15, 1887.

The object of the invention is to provide certain new and useful improvements in telegraphsonnders,whereby the messages are received very distinctly by the operator and without confusion of elementary motions, at the same time permitting such minute adjustment that the sounds produced are not in the least harsh or disagreeable to the car,

.as is so frequently the case in sounders as heretofore constructed/ The in vention consists of novel features and parts and combinations of the same, as will be described hereinafter and then pointed out in the claims.

, Reference is to be had to theaccompan yin g drawings, forming a part of this specification, in which similar characters of reference indicate corresponding parts in all the figures.

Figure l is a sectional plan view of the im provement. Fig. 2 is a sectional side elevation of the same on the line 2 2 of Fig. 1. Fig. 3 is a transverse section of the same on the line 3 3 of Fig. 1, and Fig. i is a detail view illustratinga modification in the construction of the cores of the electromagnet.

The improved telegraph-sounder is provided with a casing, preferably made of hard rubber or like material and formed of two sections A and B, of which the bottom section A is provided with an annular flange A, formed with an external thread engaged by an internal thread on the side B of the other section or cover B. In the flange A are formed openings A adapted to register with corresponding openings B in the side B of the cover B to emit the sounds to a greater or lesser degree, according to the position of $eria1N0. 678,449. (No modelfl the side B on the flange Athat is, by screwing the cover 13 more or less on the flange A the sound-emitting openings A and B may be brought more or less in register with each other for the purpose mentioned.

In the bottom of the section A is mounted an electromagnet C C, having square cores G G over which operates an armature-lever D, fulcrumed on pins E, projecting from the core (3 into apertures D, formed in the armature-lever D. Now by reference to Figs. 1 and 3 it will be seen that the fulcrum-forming pins E are located near the outer edge of thecore 0 so that the armature-lever is at all times in contact with this core near the outer edge thereof and is free to swing downward in contact with the surfaces of both cores C C when attracted by the electromagnet in the usual manner.

The armature-lever D is provided with an extension D on which is secured one end of a spring F, secured at its other end on an arm G, secured at one end at G to the bottom section A, the other end of said arm being engaged by a screw G screwing in the section A and extending to the outside thereof to be within convenient reach of the operator. Then the operator turns the head G3 of the screw G the arm G is moved inward or outward to decrease or increase the tension of the spring F, as desired.

In order to deaden all noise incident to the action of the spring F when the armaturelever D is attracted or released, I prefer to cover the said spring with a casing H, of'cotton or other suitable sound-deadening material. The upward-swinging motion of the armature-lever D when released by the electromagnet is limited by a screw I, of brass or other material diiferent from the soft-metal cores C C The screw I is secured in an arm J, having an angular extension J, fitted to slide in a bearing K,secured to the section A. A rod L is mounted to turn loosely in the arm J and is provided with a screw-thread L, screwing in-a nut N, carried, preferably, on the bearing K,the threaded portion of the rod L extending to the outside of the casing,there being a knob L on the extreme outer end of the rod; Now it is evident that when the too operator turns the knob L the SOlGW-lutl L moves the arm J outward or inward from or toward the armature-lever D to regulate the throw of the armature-lever D accordingly. The arm J may be moved outward to such an extent that the head of the screw I abuts against the inside of the cover B, so that the force of the blow of the armaturedever D on the screw I is transmitted to the cover B, and as this is the widest range ofthe armature-lever the sound produced is very loud and is mainly desired when the device is hung up for receiving calls or signals.

The casing'is provided with the usual binding-posts 0, connected with the coils of the electroinagnet and having a receiving-cable l of usual form.

The operation is as follows: \Vhen the sounder is hung up, then the arm J is'in its outermost position, the head of the screw being in engagement with the cover I), so that when a signal or call is sent through the inst ument a veryloud sound is produced, owing to the'full force of the blow of the armatureJeVcrbeing exerted on the core C and the screw 1. The operator now turns the rod L, so as to move the arm J inwardly and reduce the movement of the armature-lever D to minim um for receiving secret messages, the sounds being very distinct and clear, especially as the sound emitted by the lever D striking the cores 0 O is different from that when the lever D strikes the screw I on its return release movement. Thus by the arrangement described corlision of elementary motions is completely avoided, and the sounds are not in the least harsh or disagreeable to the ear.

The entire device is very simple and durable in construction and is not liable to get outof order.

In order to increase the d-iiference in sound on the attraction and release of the armaturelever D, I may provide the cores 0 and C with hardwood plugs C", extending a hairs breadth above the surface of the soft-iron cores. Fig. 4. shows one of the cores havingthis modified construction.

The arm J, bearing K, screw I, and rod L form an adjustable back-stop for the armature-lever to regulate the loudness of the sounds on the armature-lever striking the cores on the attraction of the lever and the screw I on the release of the armature-lever.

Having thus fully described my invention, I claim as new and desire to secure by Letters Patent 1. A telegraph sounder of the class de scribed, provided with an electromagnet, a spring-pressed armature-lever for the same, an adjustable back-stop for said armature-lever, and of a different material than the electromagnet-coresfior prod ucing distinguishing sounds upon the attraction and release of the armature-lever, the loudness of the soundboin g governed by the position of the adjustable scribed.

back-stop, and a resonant casing containing said electromagnet, arm attire-lever and backstop, the adjustment of the latter permitting of contacting the back-stop with the casing at the point farthest from the armature-lever, to transmit the sound given by the armaturelever to the back-stop to the casing,-for pro; ducing sound calls or signals, substantially as-shown and described.

2. A telegraph sounder of the class described, provided with an electromagnet, an armature-lever for the same, a back-stop for the armatu re-lever, a spring for the armaturelever, and a casing of a sound-deadening ma terial and inclosing said spring, substantially as shown and described.

3. A telegraphsounder,provided with a casing made in two sectionsscrewing one on the other, and having openings in the threaded parts and adapted to register witheach other, substantially as shown and described.

4. A telegraph sounder of the class dcscribed provided with an electromagnet, and a spring-pressed armature-lever for the same and fulcru med on one of the cores of the electroinugnet and adapted when attracted to sound on the other core, the cores of the said magnet being provided with plugs of a hard material and extending slightlyabove the surface of the soft-iron cores, substantiallyas described.

5. A telegraph sounder of the class described provided with an electromagnet, a springpresscd armature-lever for the same fulcrnmed on one of the cores of the electr cmagnet and adapted when attracted to sound on the other core, an adjustable back-stop for the armature-lever and a resonant casing containing said ele'ctromagnet, armature-lever and back-stop, the said back-st op being adapted to be adjusted to permit of contacting the same with the casing, substantially as de- 6. A'telegraph-sounder provided with a casing formed in two sections, the bottom sect on being formed with an annular flange to which the upper section or cover is adjustably secured, the flange of the lower-section and the side of the upper section being formed with openings adapted to be brought niore or less into register with each other, substantially as described.

7. A telegraph-sounder bf the class described provided with an electromagnehan armature-lever for the same, a back-stop for said armature-lever, and a resonant cas ng containing said electromagnet, armaturedever and back-stop, the said back-stop being adapted to be adjusted to mo e the same nto contact with the inside of the resonant casing, as and for the purpose set forth.

JAMES SWINTON BAYNARD.

Witnesses:

J osnrn II. Smrronn, JAMES A. Darron.

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