US856504A - Keyboard telegraph-transmitter. - Google Patents

Description

. R. .WOLTERS. KEYBOARD "TELEGRAPH TRANSMITTER.

APPLICATION FILED DEO.6,1906.

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PATENTED JUNE 11, 1907.

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KEYBOARD TELEGRAPH-TRANSMITTER.

Specification of Letters Patent.

Patented June 1 1, 1907.

Application filed December 5,1906. Serial No. 346,373.

To all whom it may concern:

Be it known that I, RICHARD lVoL'rERs, a subject of the German Emperor, residing at Dusseldorf, Germany, have invented new and. useful Improvements in Keyboard Telegraph-Transmitters, of which the following is a specification.

This invention relates to a keyboard telegraph transmitter which is so constructed that the contact slide is moved along the contact rail with regularity and without undue speed, even if the key is rapidly depressed.

In the accompanying drawing: Figure 1 is a side elevation, partly in section, of my improved keyboard telegraph transmitter; Fig. 2 is a similar view of a modification, and Fig. 8 a view similar to Fig. 2, showing the parts in a different position.

The contact slides 1 are provided, as usual, with alternating conducting and non-conducting surfaces, where they are adapted to engage the contact rail 2. Slide 1 is pivoted at 12 to operating lever 8, and has a tappet 3 which is adapted to engage upper and lower stops 5, 4, both of which are adjustable. From slide 1, extends a nose 6, having a pair of inclined faces, adapted to be engaged by a spring 7, which thus serves to hold the slide in either of its two positions. To lever 8, is pivoted a pawl 11, engaging a ratchet wheel 13 turning on arbor 14 of key 8, and oper atively connected by a suitable train of wheels, to the shaft of a regulator or governor 10 having preferably spring-influenced vanes, as shown. l/Vhen thekey 15 on the end o'flever Sis pushed down, the slide 1 is raised against rail 2, while pawl 11 moves freely over teeth of ratchet wheel 13-. If the key is now released, lever 8 is raised by a spring 16, while slide 1 glides down along rail 2, to make the sliding contact desired. During this upward movement of the lever pawl 11 will turn ratchet wheel 13, to operate governor 10, which thus effects a uniform ascent of the key, and consequently a uniform and gradual descent of the slide along the contact rail. The vanes of the governor should be adjustable, to obtain the speed desired.

In the construction shown in Figs. 2 and 3, the regulated contact between slide and rail takes place during the depression of the key. Here the operating lever is jointed, being composed of front arm 8, and rear arm 9, which have their fulcrum 14 on the axis of ratchet wheel 13. Arm 9 has a shoulder 20, adapted to engage a corresponding shoulder 19 of arm 8. To arm 8 is pivoted a springcatch 17, adapted to engage a keeper 18, and having a tail-piece 21, which is adapted to be engaged by shoulder 20 when arm 9 approaches alinement with arm 8. ()n pivot 14 turns the ratchet-wheel 13 engaged by pawl 11 and adapted to actuate the regulator 10. Arm 9 is influenced by a weak spring 22, while arm 8 is influenced. by a strong spring 16.

If arm 8 depressed by key 15, against action of spring 16, shoulder 19 clears shoulder 20, (Fig. 3), so that spring 22 can raise arm 9, while arm 8 is held down by the en gagement of catch 17 with keeper 18. During this movement of arm 9, pawl 11 will turn wheel 13 to actuate the governor, which will thus cause a slow and uniform raising of slide 1 against rail 2, even if the key is quickly depressed. \Vhcn slide 1 has been sulliciently raised, shoulder 20 will push back tail-piece 21 of catch 17, so that the latter is liberated from keeper 18. Arm 8 will now be raised by spring 16, so that its shoulder 19 will reengage shoulder 20 and lower arm 9 against action of spring 22.

It will be seen that the construction shown in Fig. 1., is substantially the same as that shown in Figs. 2 and 3, the difference being that, while in Fig. 1, the regulated contact takes place during the raising of the key, in Figs. 2 and 3, such contact takes place during the depression of the key.

I claim:

1. In a device of the character described, a spring-influenced key, a contact rail, a contact slide pivoted to the key and adapted to engage said rail, and a pair of stops adapted to be engaged by the slide, substantially as specified.

2. In a device of the character described, a spring-influenced key, a contact rail, a contact slide pivoted to the key and adapted to engage said rail, a tappet on the slide, and a pair of stops adapted to be engaged by the tappet, substantially as specified.

3. In a device of the character described, a spring-influenced key, a contact rail, a contact slide pivoted to the key and adapted to engage said rail, a tappet on the slide, a pair of stops adapted to be engaged by the tappet, and means for locking the slide in position, substantially as specified.

4. In a device of the character described, a spring-influenced key, a contact rail, a con tact slide pivoted to the key and adapted to engage said rail, a nose on the slide, and a spring on the key adapted to engage the nose, substantially as specified.

5. In a device of the character described, a springinfiuenced key, a contact rail, a contact slide operatively connected to the key and adapted to engage said rail, and a pair of stops adapted to operatively engage the slide, combined with a governor, and means for operatively connecting said governor to the key, substantially as specified.

6. In a device of the character described, an arbor, a key and a ratchet Wheel rotatable on the arbor, a contact rail, a contact slide pivoted to the key and adapted to engage said rail, a pawl pivoted to the key and adapted to engage the ratchet Wheel, and retarding means operatively connected to the ratchet wheel, substantially as specified.

7 Ina device of the character described, an arbor, a key composed of two spring-influenced sections, both rotatable on the arbor, a contact rail, a contact slide pivoted to fluenced sections, both rotatable on the arbor, a contact rail, a contact slide pivoted to the first key-section and adapted to engage the rail, a catch pivoted to the second keysection, and a shoulder on the first key-section adapted to engage the catch, substantially as specified.

Signed by me at Dusseldorf, Germany this 9th day of November 1906.

RICHARD WOLTERS.

IVitnesses ALFRED PHLMEYiJR, M. ENGELS.

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