US663903A - Telegraphic instrument. - Google Patents

Description

UNITED STATES PATENT OFFICE.

HARRY T. JOHNSON, OF JERSEY CITY, NEW JERSEY.

TELEGRAPHIC INSTRUM ENT.

SPEGIFICATION forming part of Letters Patent No. 663,903, dated December 1900 Application filed February 26, 1900. Serial No. 6,529. iNo model.)

To all whom it may concern:

Be it known that I, HARRY T. JoHNsoN, a citizen of the United States, and a resident of Jersey City, Hudson county, New Jersey,have made certain new and useful Improvements in Telegraphic Instruments, of which the following is a full, clear, and exact description, reference being had to the accompanying drawings, forming part of this specification.

My invention relates to telegraphic instruments, such as sounder-s, which are provided with a vibrating armature and with electromagnets by which the armature is actuated; and the object. thereof is to provide a simple, positive, and efficient means for adjusting the position of the armature so as to vary the distance between the same and the magnets.

In the drawings, Figure 1 is a side elevation, partly in section,of a telegraphic sounder embodying my invention. Fig. 2 is a plan view thereof, showing also a section on the line 2 2, Fig. 1; and Fig. 3 is an end elevation showing a section on the line 3 3, Fig. 1.

Similar reference characters are employed to designate corresponding parts in all the Views.

The form of instrument which I have shown in the drawings is a telegraphic sounder of the usual type and comprises a base-board A, upon which the sounder is mounted. The electromagnets B, the anvil O, and the standards or frame D, by which the armature-le ver E is supported, are secured to the plate E, which is preferably of metal and is secured to the base A. The armature-lever E, which carries the armature E, is pivotally mounted at e in the yoke G. The standards D are provided with offsets or projections d, through which extend set-screws g, which form bearings upon which the yoke G is pivotally supported. A depending arm H is secured to the yoke G, and the lower end of said arm is slotted to receive the end of the adj usting-screw I, which works in the screw-threaded standard 2', secured to the base. The inner end of the adjustingscrew is provided with a circumferential recess, and the slot in the arm H is reduced in size, so that the slot will lie in the recess formed in the inner end of the screw, sufficient play being allowed to perlation of said screw and the arm H. A compression-spring i, which bears against the opposing faces of the standard 1 and arm H, serves to hold the arm H in positive engagement with the head or shoulder formed on the inner end of the screw I by the annular recess. The free end of the armature-lever E is normally held in contact with the contactscrew K, carried by the arm of the anvil, by a tension-spring L in the usual manner, the spring L being connected with the end of the armature-lever and with the tension-shaft M, which is operated by the milled head m.

From the foregoing description it will be observed that when varying current conditions on the line render a variation in the operative distance between the armature E and the poles of the electromagnet desirable such variation may be quickly and accurately secured by simply turning the adjustingscrew I. By turning the latter to the right the arm II will be carried away from the standard 2' and the yoke G will be swung on its pivots to lift the ends of the yoke and the bearings of the armature-lever E, thus increasing the distance between the armature and the poles of the magnets. By turning the screw I to the left this operation will be reversed, the arms of the yoke and the bearings for the armature-lever will be lowered, and the armature will be carried closer to the magnet-poles.

It is to be understood that I do not limit myself to the particular form or characterof mechanism which I have shown and described for adjusting the position of the pivotal bearings of the armature-lever.

Having thus shown and described my invention, what I claim as new, and desire to secure by Letters Patent, is

1. A. telegraphic instrument comprising a pivotally-supported frame,an armature-lever pivoted in said frame eccentrically to the framesupport and means for adjusting the position of the frame to raise and lower the armature-lever, substantially as shown and described.

A. telegraphic instrument of the character described comprising an armature-lever, a swinging support therefor and an adj ustinit the necessary variation in the angular re- 1 ing-screw for varying the position of said supmature and magnet, substantially as shown ort to raise and lower the armature substanand described.

tiaily as shown and described.

nation with the magnet, armature and arma- 5 tnre-1ever, of a swinging support for the armature-lever and means for actuating said support to vary the distance between the ar- Wil n esses ARTHUR F. THOMPSON, WM. W. SI-LUV.

3. In a telegraphic instrument, the conlbi- HARRY T. JOHNSON.

Images