US322809A - Pateick b - Google Patents

Description

(No Model.)

P. B. DELANY. MEANS FOR AOTUATING AND CORRECTING THE VIBRATIONS 0F FORKS, REEDS, 6w.

Patented July 21, 1885,

P" mimmmmrrum1mmm:mm.IJMIHJH mm? mmm'ua:

WITNESSES 2 INVENTOR N. PETERS, Pholo-Lflhognpher, Washington, D. c.

PATRICK B. DELANY, on NEW YORK,

MULTIPLEX TELEGRAPH COMPANY, OF SAME PLACE.

MEANS FOR ACTUATING AND CORRECTING PATENT OFFICE.

N. Y., ASSIGNOR TO THE STANDARD THE VIBRATIONS F FORKS, REEDS, do.

SPECIFICATION forming part of Letters Application filed April To all whom it may concern.

Be it known that I, PATRICK B. DELANY, of New York city, State of New York, have invented certain new and useful Improvements in Devices for Actuating and Correcting the Vibrations of Reeds, Forks, &c., of which the following is a specification.

In Various electrical apparatus in which vibrators are employed the successful operation depends upon the proper adjustment or control of the normal rate of vibration. For instance, in several Letters Patent of the United States granted to me on the 9th October, 1883, I have shown systems of electrical I 5 synchronous movements designed for telegraphic and other purposes in which I prefer to employ a vibrating fork or reed. In such patents the normal rate of vibration of the fork is shown as controlled by the adjustment of the pole-pieces of the vibrator-magnet laterally with reference to the fork, so as to move the poles closer to or farther from the sides of the fork.

My present invention constitutes a novel and improved manner of regulating the vibration of forks, reeds, &c.

In the accompanying drawings, Figure 1 is partly a diagram and partly a plan view of my improved organization. Fig. 2 is a side elevation of the same. Fig. 3 is a detail view of a slightly-modified arrangement; Fig. 4, a detail enlarged sectional View of the straps which hold the magnet, and Fig. 5 a detail View of the magnet-core.

A represents a section of a circular table on which insulated contacts are arranged. These contacts are traversed by a rotary circuitcompleter, A, which is connected with the main line. Some of the contacts upon the table-say the 9s and 10s-are utilized for the reception of correcting impulses of electricity to correct the speed of the vibrator.

For specific information as to this apparatus reference is made to my patents, before mentioned. It will be sufficient at present merely to show one contact (numbered 10 in the drawings) with which the branch circuit a, which passes through the coil of the relay B to earth, is connected. \Vhen a correcting 5o impulse is received from the line, it will pass through the controlling circuit-eompleter A,

Patent No. 322,809, dated July 21,1885,

13, 1885. (No model.)

contact 10, and line a to the ground, thus en ergizing the relay B, as is presently fully described.

The circuit-completer A may be, as in my previous patents, rotated by means of a motormagnet, A arranged in proper relation to the teeth a of a rotating armature-disk 011 the spindle of which the rotary circuit-completer A is secured. The motormagnets are ener- 6o gized in this instance by a main battery, MB, the circuit of which will presently be described. The vibrator (a fork, 0, being illustrated in this instance) is securely mounted in a post,

0, carried by a suitable base-board. A rod, D, is arranged between the tines of the fork and substantially parallel therewith. One end of the rod passes loosely through a post, (I, located between the tines of the fork, and the other end is screw-threaded and passes through a post, (1. By means of a thumb-nut, (P, on the screw-threaded end of the rod, the rod may be adjusted endwise, as is well understood. I preferably employ a coil spring, (1", wound around the rod d and interposed between the 7 5 post (1 and the magnet E. This spring tends constantly to press the magnet, and with it the rod, inwardly between the tines of the fork, so that when the nut d is unscrewed the magnet will move inwardly, and when the nut is screwed up it will be drawn outwardly. The magnet E, the core of which is sufficiently short to permit its entrance between the tines of the fork, is fixed on the rod D, as shown in the drawings. The core of the magnet is prefer- 8 5 ably formed in three partsnamely, a central portion, 0, Fig. 5, on which the coil is wound, and pole-pieces c c, which screw into the core, and are therefore capable of adjustment with reference to the tines of the fork. The helix of the magnet is surrounded by two insulated semicircular metal straps or bands, F, which are secured together by flanges f, separated by some suitable insulating material, f.

The bolts f, which secure the flanges, are insulated from their sockets in the flanges, as is well understood.

I have spoken of the rod D as if it were a continuous rod passing through the magnet.

I prefer, however, the details of constructioi'l shown in Fig. 3, from which it will be seen that the rod is composed of two sections, D D,

each of which has secured upon it one of the semicircular metal straps F, so that when the straps are bolted around the helix of the magnet the magnet will be as firmly held,and may be adjusted as described, the same as if the rod D were in one piece. I prefer this construction because no room is wasted in the winding of the helix on the core, and it also affords convenient means for connecting the circuits, as is presently described.

A pivoted insulated arm, G, is secured upon the bed-plate and carries a light metal coniact-finger, g, which projects upwardly and makes contact with a platinum plate, 9, on the outer side of one of the tines of the fork. The contact is normally pressed toward the tine of the fork by a spring, 9 and the arm G may be adjusted against this spring by a screw-bolt, G.

One pole of the main battery MB is connected with a metal post, 0, in which the fork is mounted. From thence the circuit passes through the tine of the fork, contacts 9 1/, arm G, and post (Z. A rubbing contact-finger, D", on the post (1 bears upon the rod D, so that the circuit continues through the rod D, coil of helix, and rod D to the post d,and from thence by a wire, r, through the coils of the motormagnet A to the opposite pole of the battery MB. A resistance, It, is placed in a shunt circuit, .9, which is thrownaround the contacts 1 g to prevent sparking, as is well understood. A branch circuit (indicated by t) extends from the post (I to the armature i of a magnet, T; thence by the front contact of such armaturethrough an adjustable resistance, Rh, and wile i to the post (1, where it joins the main-circuit wire a. Normally,the armature of the relay B is against its back stop and the local of the magnet T is closed. The armature 1/ of said magnet is therefore drawn to its front stop, so that the branch or shunt circuit t t z? is normally closed. hen the fork is started into vibration, the circuit of the battery MB will be opened and closed by the vibration of the fork at the contacts 9. These makes and breaks alternately cause the magnetization and demagnetization both of the motor-magnet A and of the vibrator-magnet E, so that the fork is continuously and automatically vibrated,and the armaturedisk and rotating circuit-eonipleter continuously and automatically rotated. If, now,an impulse of electricity for correcting the speed of the vibrator be sent or received over the main line, the armature of the relay B will be drawn from its back contact, the armature t of the magnet T will fall away from its front contact, and the shunt or branch circuit t t i will be opened. The main fork-circuit will therefore take more current, the electromagnetic effect of the magnet E upon the tines of the fork will be increased, and the fork will. vibrate more slowly. This impulse of correction is of course but momentary, and when the traveling rotator leaves the correcting-contact 10 the parts are immediately restored to the normal condition.

The resistance of the shunt-circuit [L I may be varied at the adjustable resistance R/z, so that the amouutof correction can beadjusted.

In my patent No. 286,281 of October 9, 1888, I have shown an arrangement for correcting the vibrator by shunting a resistance in the main fork-circuit in or out for the purpose of correcting a vibrating fork, and in an application for Letters Patent filed by me February 28, 1884-, serially numbered 122,054, I have shown a similar arrangement, and also a plan by which the direct fork-circuit is momentarily interrupted to correct the speed of the vibrator. In the present instance it will be perceived that I change the current or vary the electromagnetic power of the direct fork-circuit by opening a branch or shunt, which normally takes part of the current. Obviously, the same results could be attained by permitting the brancht t If to be normally open, and close it upon the reception or transmission of the correcting impulse. In that event part of the current in the direct circuit would be shunted around the fork, the electro-magnetic power ofthe magnet E weakened, and the fork would consequently vibrate more rapidly. In either event the current in the coils of the motor-magnets will remain practically unchanged.

Some means is practically always necessary in this or other apparatus of similar character to adjust the normal rate of vibration of the fork. By screwing the polepicces e in or out they may be adjusted in the desired relation to the tines of the fork, so as to regulate the rate of vibration. The fork is further controlled in this regard by adjusting the vibrator-magnet in a direction parallel, orsubstair tially so, with the vibrator or tine of the fork.

Obviously, by causing the magnet E to move in or out between the tines of the fork the relation of the magnet to the tines will be va ried, and correspondingly affect their rate of vibration. For instance, with the magnetpoles just entered between the tines of the fork-or, in other words, considering the action with reference to one tine of the fork or a vibrating reedwhen the pole of the magnet is moved toward and parallel with the vibrator, so as to bring it opposite the side of the vibrator, the magnetic field acting on the vi brator is increased and the rate of vibration is retarded,whereas when the pole of the mag-v net is moved outwardly, when it commences to pass from between the ends of the t'ork or, in other words, when less of its field is caused to act on the vibrator-the rate-isaceelerated.

So far as I am aware the only manner of changing the relation of the poles of the vibrator-magnet to an automatically and continuously acting vibrator has been by adjusting the poles nearer to or farther from the vibrator.

IIO

I am not aware that it has even before been proposed to effect a change in the normal rate of vibration of such devices by adjusting the vibrator-magnet in a plane parallel, or substantially so, with the longitudinal axis of the vibrator.

The arrangement has many advantages. A

-very much more delicate efiect may be produced upon the vibrator than with the use of a fine micrometer-screw for approaching the poles toward or withdrawing them from the vibrator in the ordinary manner. Of course I may use in my present plan a fine micrometer-screw, as is well understood. By imagining the idle tine of the fork, or the one which does not carry the contact 9, to be removed all the'conditions attending the use of a vibrating reed will exist. Instead of leaving the idle tine of the fork to vibrate, one pole of the magnet E may be placed in sliding contact with that tine, as clearly illustrated in Fig. 4.

I do not limit myself to the specific details of construction and arrangement, though the particular structure shown possesses advan tages. For instance, in the particular construction of magnet the small amount of iron in the core and the capacity of the pole-pieces e for adjustment are desirable.

I claim as my invention- 1. The combination of a continuously auto matically-acting circuit-interrupting vibrator, a vibrator-magnet, and means for adjusting the pole of the magnetin the direction of the length of the vibrator to change the normal rate.

2. The combination of the vibrator, a vibrator-magnet, the laterally-adjustable polepiece of said magnet, which may be adjusted laterally toward or from the vibrator, and means for adjusting the pole of the magnet in the direction of the length of the vibrator.

circuit-interrupting vibrator, the vibratormagnet, its fixed core, and the adjustable polepiece of the magnet, which may be adjusted toward or from the vibrator in a line coincident with the axis of the magnet,whereby the normal rate of the vibrator may be regulated.

6. The combination of the vibrator, the vibrator-magnet, the battery and circuit of the vibrator-magnet, a branch or shunt circuit around the vibrator-magnet, a resistance in said shunt, and means for controlling the shunt to correct the speed of the vibrator.

7. The combination of the rotating disk and circuit-completer, the table of contacts, the motor-magnet, its circuit, an automatic circuit breaker or vibrator for interrupting the motor-circuit, its magnet, its circuit,and shunt around the magnet, and means for controlling said shunt, for the purpose set forth.

In testimony whereof I have hereunto subscribed my name.

PATRICK B. DELANY.

Witnesses:

WENDELL Goonwm, R. G. BROWN.

Images