US1140151A - Telegraphic instrument. - Google Patents

Description

I. J. GHEGAN. TELEGRAPHIC INSTRUMENT. APPLICATION man APR. 25. 191

'- Paten ted May 18, 1915.

qwi-tmoooco UNITED STATES PATENT OFFICE.

JOHN J. GHEGAN. OF NEWARK, NEW JERSEY.

' TELEGRAPHIG INSTRUMENT.

. graphic instruments, and particularly to a transmitter of the type in which certain of the usual transmitting signals are automatically made by a vibrator set in motion by the operator.

The object of my-invention is to provide an instrument of this type which combines simplicity of construction, ease of manipulation and efficiency of operation.

In the accompanying drawings, Figure 1 is a partially broken plan view of a tele-' graph key in which my invention'is embodied in an exemplary form; Fig. 2 is a. perspective of the same, partially broken away; Fig. 3 is a cross section through a detail; and Fig. 4 is a diagram on small scale showing the electrical connections between certain of the parts.

7 In the construction here illustrated for the purpose of explaining the present in- 80 ventlon, the apparatus is mounted upon a metal plate 5 carried by a base 6 of any suitable shape or material.

Binding posts 7 and 8 for the circuit wires 0. and b are mounted upon the plate 5, that numbered 8 being insulated therefrom by suitable bushing and washer 9. Transmitter terminal posts 10 and 11 are also mounted on the plate 5 and are insulated therefrom by their respective bushings and washers 12 and 13, while being connected together and to the wire terminal 8 by conducting wires or straps 14, 15, arranged below the plate for the sake of convenience and appearances. The circuit between wire termlnal 7 and wire terminal 8 is completed through the conductors 14, 15', either by the switch 16 or the transmittmg key or vibrator 17. The switch 16 is pivoted at 18 on the plate 5 and may be swung under the sprin strap 19 on the terminal 11, thus shortclrcuitmg the vibrator 17 and rendering the instrument inoperative for transmitting 'purposes. This is the usual position of the switch when the instrument is not in use. When it is desired to transmit, the switch is swung open against the stop 20 in which Specification of was mat.

Patented May 1s 1915.

App1ication'fi1edApri125, 1913. Serial in. 763,605.

position the circuit through the instrument is open. The transmitter key or vibrator 1'7 may then be put into operation to intermittently close the circuit in the transmission of signalssuch for instance as the usual dots and dashes of the Morse code. The peculiar constructipn of the present vibrator facilitates this operation. I

As here shown, the vibrator comprises a long strip of spring steel extending hori- 'zontally substantially the length of the plate 5 and held in edgewise vertical position in the slotted frame 36 by the clamping screw 21. At its other and free end it carries a weight 22, preferably fixed rigidly and permanently in position thereon. As here shown the weight 22 is slotted and the free end of the vibrator inserted in the slot, the parts being soldered, swaged, riveted or otherwise permanently united. Platinum I contacts 23 are here shown fixed in the vibrator web at the point which lies between the transmitter terminal screws 24, 25, each provided with a platinum terminal pin 26 adapted to cooperate with the contacts 23 on the vibrator. In the normal position of rest, the vibrator is out of contact with both terminals 24 and 25, while it is, at the same time, subjected to the action of a spring 27 carried by the screw 28 which is adjustably mounted in the post 29 so that the tension of the spring may be varied. In this position the vibrator is slightly flexed so that its weight 22 is pressed against the adjustable stop screw 30 carried by the post 31. A cork plug 32 inserted in the side of the weight 22 bears against the ,end of the stop screw and serves to deaden the stroke of the vibrator against the stop under the influence of the spring 27.

To operate the vibrator I provide an operating lever 33, pivoted by a pin 34 in the socketed bearing screws 35, in the frame. 36, and having a thumb piece 37 of insulating material on one end. The other end of the lever 33 which extends inthe same general direction as the vibrator, is upturned to form a lug 38, the screw 39 on which clamps one end of the spring 27 while its shank bears against the sideof-the vibrator under the influence of the spring. In the position of rest shown in Fig. 1, the vibrator is slightly flexed by the spring 27 and the platinum contacts 23 are both out of contact 110 with the platinum pins 26 on the trans mitter terminal screws 24, 25.

4 described, comprising a stationary frame,'a

On the sending of a'message the circuit is first opened by swinging the switch 16 back against the stop 20. The operating lever is then swung on its pivot either to the one side or the other depending upon whether a dot or a dash is to be transmitted.

thus completed from the wire terminal 7 through the plate 5, vibrator 17, contact 24 and connectors Hand 15 to the wire terminal 8. The circuit is maintained sufficiently long to register the desired prolonged signal, such as the Morse dash.

To transmit a series of short signals, such as Morse dots,'the operating lever is moved in the opposite direction sufficiently to free the vibrator, with the result that under the influence of the tension to which it has been subjected by the pressure of the spring 27 or the operating lever 33, it is set into vibration. Its vibratory motion is of suificient extent to bring the contact 23 into intermittent momentary electrical connection with the transmitter contact 25, and the series of momentary completions of the'circuit which are thereby caused,reifects the transmission of the dot signal.

The construction shown is to be regarded merely as an exemplification of my invention which may be variously modified without departing from myinventiofi'.

I claim as my invention 1. A telegraphic instrument of the type flexible vibrator rigidly secured at one end therein, a pair of transmitter terminals afranged on opposite sides of said vibrator and a pivot lever for deflecting said vibrator into contact with one of said terminals for signals of prolonged duration.

2. A telegraphic instrument of the type described, comprising a flexible vibrator, a pair of transmitter terminals arranged on opposite sides thereof and a lever for deflecting said vibrator into contact with one of said terminals for signals of prolonged duration, in combination with a spring normally flexing said vibrator and means in connection with said lever for. freeing the vibrator from the action of said spring to permit said vibrator to automatically contact intermittently with the other transmitter terminal, for the purpose specified.

3. A telegraphic instrument of the type described havinga flexible vibrator, comprising a strip of flexible metal, a weight permanently fixed at one end thereof and a stationary frame in which the other end of said strip is clamped together with independent terminals arranged on opposite sides of said vibrator and. means for bringing the dash signals and into intermittent contact with the other to effect dot signals, substantially as described.

4:. A telegraphic instrument of the type described, comprising a frame, a flexible vibrator mounted therein, a pivoted lever, a spring maintaining said lever in contact with said vibrator,- a contact adjacent the latter and a handle on said lever for moving the same in the direction of-the efiort of said spring to deflect the vibrator against said contact.

5. A telegraphic instrument of the type described, comprising a frame, a flexible vibrator mounted therein, a pivoted lever, a spring maintaining said lever in contact with said vibrator, a contact adjacent the latter and a handle on said lever for moving the same in the direction of the eifort of said spring to deflect the vibrator against said contact, a switch terminal in electrical connection with said contact and a pivoted switch bar for closing the transmitter circuit through said terminal and vibrator, substantially as described.

6. A telegraphic instrument of the type described, comprising a flexible vibrator, a stop therefor, a spring normally flexing the vibrator against said stop, a transmitter terminal normally out of contact with said vibrator, and an operating lever adapted to further flex said vibrator, while engaged by said stop, to press the same against sai transmitter contact,for the purpose specified.

7. A telegraphic instrument of the type described, comprising a flexible vibrator, a

name to this specification, in the presence of two subscribing witnesses.

' JOHN J. GHEGAN.

Witnesses:

WALTER Anna, L'H. GRoTE.

' latter in continued contact with one to effect

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