US1190625A - Telegraph-key. - Google Patents

Description

- W. A. BOYD.

TELEGRAPH KEY. APPLICATION FILED MAY29. 1914.

Patented July H, 1916.

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b sen ran WALTER ANDERSON BOYD, OE BROOKLYN, NEW YORK, ASSIGNOR, BY MESNE ASSIGN- MENTS, TO WESTERN ELECTRIC COMPANY, INCORPORATED, A CORPORATION OF NEW YORK.

TELEGRAPH-KEY.

Specification of Letters latent.

Patented July 11, 1916.

To all whom it may concern Be it known that T, WALTER ANDERSON Born, a citizen of the United States, residing at Brooklyn, in the county of Kings and State of New York, have invented certain new and useful Improvements in Telegrapl1Keys, of which the following is a full, clear, concise, and exact description.

This invention relates to telegraph keys and has for its object the production of a telegraph key of few and simple parts and reliable in operation.

In accordance with this invention, generally speaking, there is provided a telegraph key having two pivoted and independently movablelevers each carrying a contact, which pair of contacts make both dots and dashes, the two pivoted levers being movable by a floating key lever located between the pivoted levers.

This invention will be more fully understood by reference to the drawings showing one embodiment thereof and wherein- Figure 1 is a plan view of a telegraph key; Fig. 2 is a side elevation of the telegraph key shown in Fig. 1; and Fig. 3 is a sectional view on line 33 of Fig. 1.

As shown in the drawings, the telegraph key comprises a base 5 having an opening 6 therein, over which there is placed a plate 7 secured to the base 5 by means of screws 8, 8. A trunnion bracket 9 is mounted upon the plate 7. An operators Lshaped key lever 10, having insulating finger pieces 11, moves from left to right and from right to left on a vertical shaft 12 suitably mounted in upper and lower bearings in the bracket 9. An end of the key lever 10 is provided with an upwardly extending portion 13, which, when the key lever 10 is moved from left to right, engages a pin 16 carried by one end of alever ll mounted on a shaft 15 suitably mounted in upper and lower bearings in the bracket 9. A fiat vertical spring 20 is se cured to the other end of lever 1e and has attached to its opposite end a vibrating rod or bar 21 carrying a weight 22, which may be slid back and forth thereon and held at any desiredpoint. A flat spring 24:, carrying at one end a contact 25, is secured to and operates with the vibrating bar 21, a spacer 26 being interposed between the spring 24L and the bar 21. The spring 24: is held under a normal tension by means of a backing leaf Normally, the lever 1 1 is held in a blased position against a stop pin 28 carried by an arm 29 of thebracket 9 by means of the expansion of a coiled spring 30, one end of which is in engagement with the lever 14: and the other end with an adjustment screw 35 mounted in a suitable support 36. A screw 37 and a support 38 therefor form a suitable stop for the lever 14 when it is actuated by the key lever 10. A deadener or damper for the vibrating bar 21 consists of a pin 39 adjustably mounted in a support 10, and carries in one end a piece of leather 41 or other suitable damping material. The free end of the spring 2 1 is normally held at rest against a piece of rubber 12 or other suitable insulating material carried in one end of a screw 43 adjustably mounted in a support 44. A second trunnion bracket 50 is mounted .on the plate 7 but insulated therefrom by means of a strip 51 of mica or other suitable insulating material. A lever 52, carrying at one end a contact 53, is mounted on a vertical shaft 5 1 suitably mounted in upper and lower bearings or trunnion screws 19 held in the bracket 50. The upwardly extending portion 13 of the key lever 10, when said key lever is moved from right to left, engages the insulating tip 55 of a screw 56 adjustably mounted in an upwardly extending portion 57 of an intermediate lever 58'1nounted on shoulders 59 formed on the trunnion screws 49.

The expansion of a coiled spring 64:, one end of which is in engagement with an end of the contact-carrying lever 52 and the other end with an adjustment screw 65 mounted in an arm 66 of the bracket 50, holds the contact-carrying lever 52 in a normally biased position against the end of an adjustment screw 67 carried in one end of the intermediate lever 58. The expansion of the spring 64, through the medium of the contact-carrying lever 52 and the screw 67, also holds the intermediate lever 58 in a normally biased position against a stop pin 68 carried by an arm 69 of the bracket 50.

70 and 71 represent terminals to which the conductors of the telegraph circuit may be attached. In order that the line circuit, to which the telegraph key is connected, may be closed when the key is not in use, a circuit-closing lever 7 2 is pivoted at 74: on an extension 73 of the bracket 50, and is adapted to engage the contact jaws 75 and resting mounted on an extension 7 6 of the bracket 9.

When the key leverlO is moved to the right. from normal position, lever 14 'is moved away from the stop pin 28 and against the adjustably mounted stop screw 87, the vibrating bar 21 from the stop 41 and the spring 24 from the stop pin 42, whereby the bar 21 is permitted to vibrate, causing the Contact 25 to rapidly engage and disengage contact 53 making a series of dots.' When the key lever '10 is moved to the left from normal position, the intermediate lever 58 is moved away from the stop pin 68,"and;through the screw 67 moves the contact-carrying lever 52, whereby the contact 53 is brought into engagement with contact 25 making a dash. 7

.It will be seen that contact 53 mounted on'the' end of bar 52 is held rigidly and free from vibration, while contact 25 is brought into engagementtherewith for making dots. It will further be seen that contact 25 mounted on spring member 24 against back-stop 42 is 'held'in adefinite fixed position freeffronivibration, while contact 53 is brought into engagement therewith 'for producing dashes.

What is claimedis: 1. A telegraph key comprising a base, two independently movable levers pivotally mounted thereon, a contact carried by each of said levers, means for holding one of said contacts rigid and moving the other into contact therewith to make dots and for holding said other contact rigid and moving j gage and diseng dashes; 1 r e I 2. A telegraph; key comprising a base, two independently movable levers pivotally mounted thereon, 'a contact carried by each of said levers, andfa floating key lever pivthe said one into contact therewith to make otally mounted on said base between said levers, wherebymovement of said key lever in 'one directlon causes said contacts to en- 'key lever for moving age in rapidsuccession, and

in another direction causes a ment of said contacts.

3. A telegraph key comprising a base, two independently movable levers pivotally mounted thereon, acontact carried by each of said levers, spring-pressed means for holding one of said contacts stationary, a

the other of said contacts into engagement therewith to make dots, spring-pressed means for holding the other of said contacts stationary, and an intermediate lever through which movement of said key lever is transmitted to move the said one contact into engagement with said other contact to make dashes.

4. A telegraph key comprising a floating key lever movable in two directions, a lever actuated by movement of said key lever in one direction but remaining stationary during its other movement, a vibrator actuated by movement of said key lever, a contact carried by said lever and a contact carried by said vibrator, movement of said key lever to actuate said vibrator causing said contacts to engage and disengage in rapid succession to produce dots and movement of said key lever to actuate said lever causing said contacts to engage to produce a dash.

5. A telegraph key comprising a floating key lever movable in two directions, a vibrator, a contact carried thereby, a pivotally mounted lever, a contact carried by said lever, an intermediate lever through which said first lever is actuated by movement of said key lever in one direction causing said contacts to engage to produce a dash, movement of said key lever in another direction causing said vibrator to oscillate whereby said contacts engage and disengage in rapid succession to produce dots.

In witness whereof, I hereunto subscribe my'name this 28 day of May A. D., 1914.

lVALTER ANDERSON BOYD.

Witnesses:

K. L. STAHL, N. E. TUTHILL.

single engage- Copies of this patent may be obtained for five cents each, by addressing the Commissioner of Patents, vVil'ashington, D. G.

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