US447166A

US447166A - Samuel wesley smith

Info

Publication number: US447166A
Authority: US
Publication date: 1891-02-24
Anticipated expiration: 1908-02-24

Description

- 2 Sheets-Sheet 1.

(No Model'.)

S. W. SMITH. TELEGRAPH TRANSMITTER. v No, 447,166. Patented Feb. 24,1891.

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.S. W. SMITH.

TELEGRAPH TRANSMITTER.

No. 447,166. Patented Feb. 24,1891.

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UNITED STATES PATENT FFICE.

SAMUEL 1V ESLEY SMITH, OF NE\V YORK, N. Y.

TELEGRAPH-TRANSMITTER.

SPECIFICATION forming part of Letters Patent No. 447,166, dated February 24, 1891.

Application filedllovemher 13, 1890. Serial No. 371,281. (No modeLl a key may be operated to send one letter before the movement of a preceding key is completed, thus affording means for transmitting very rapidly.

To this end my invention consists in certain features of construction and combinations of parts, which will be hereinafter described and claimed.

Reference is to be had to the accompanying drawings, forming a part of this specification, in which similar letters of reference indicate corresponding parts in all the figures.

Figure 1 is a side elevation ofa transmitter embodying my invention. Fig. 2 is a broken vertical cross-section of the same. Fig. 3 is a rear elevation of the key-tube and the hollow shaft therein, a portion being broken away to show the means for closing the circuit and for limiting the movement of the hollow shaft. Fig. Ais a broken plan view of the transmitter. Fig. 5is a horizontal section of the sameon the line 5 5 of Fig 2. Fig. 6 is an enlarged sectional view on the line 6 6 of Fig. 2. Fig. 7 is an; enlarged sectional view through the main tube and hollow shaft on the line 5 5 of Fig. 2. Fig. 8 is a side elevation of a modified form of transmitter, showing a peculiar stop for limiting the movement of the transmitter-shaft. Fig. 9 is a front elevation, partly in section, of the same. Fig. 10 is a horizontal section on the line 10 10 of Fig. 8, and Fig. 11 is a detailed sectional view showing the pawl and plate for moving the character-disk.

A table A has a central plate A thereon, and is also provided with binding-screws B in the usual manner, and fixed to the plate A are the vertical supports C, in which is mounted a shaftD, which carries the sending mechanism and which is insulated in its bearings. The shaft D has a character-disk E fixed thereon, which hasprojecting points 6 adapted to make and break the circuit, and thus transmit the character represented by the disk, the insulating-washerF being fixed to the shaft at the side of the disk and insu lating material being also inserted between the projecting points of the disk.

A trailer G is fixed to a post G of insulating material, which is fixed to the plate A on a line with the character-disk, and the trailer is connected with one of the bindingposts bya wire g, and as the binding-posts are connected with the line-wire in the usual manner the pulsations transmitted to the trailer by the disk will be sent over the line in the usual way. The shaft D has also an eccentric disk H near one end, and a spring h is mounted on a support H adjacent to the disk, so that the pressure of the spring upon the disk will govern the movement of the shaft.

The above construction I do not claim as a part of the present invention, as I have alreadyfiledan application fora patent for the same, the application having been filed June 2, 1890, Serial No. 354,007.

Centrally fixed to the shaft D is a pinion I, which projects through a slot or opening J in the side of the tube J, the tube being fixed to the plate A, so as to extend vertically through the same, and the lower end of the tube having a spiral spring j therein. The tube has also a vertical slot j at its upper end in the back, and mounted in the tube is a hollow shaft K, the shaft having a suitable flange at the top to limit its downward movement in the tube J and having also a stud 7t on one side, which extends through the slot j of the tube, and thus serves as a guide for the shaft. The shaft K is cut away in its central portion, as is best shown in Figs. 3 and 7, thus forming a horizontal shoulder K at the bottom, the central port-ion being formed on o )osite sides into a rod 7t" and little above the plate A and engages with the shoulder K of the hollow shaft K, and thus limits the upward movement of the shaft.

A rod L extends vertically through the hollow shaft K and is suitably insulated therein, the upper end of the rod being formed into a head L and the lower portion of the rod beneath the lower end of the shaft K having a washer Z fixed thereto, so that when the rod is in an elevated position, as shown in Fig. 2, the washer will strike the lower end of the shaft K and close the circuit in the manner hereinafter described.

A washer M, of insulating material, is inserted between the washer l and the spiral springj, and when the circuit is through the rod L, as described below, it will be seen that I 5 during the downward pressure on the rod the washer Z will be forced away from the shaft K, so that the current cannot pass through the shaft; but during the upward movement of the rod and shaft the washer Z will be held against the lower end of the shaft by the action of the spring, and the circuit will thus be closed through the hollow shaft.

On the back side of the plate A is a vertical post N, which is insulated from the plate and which is connected bya wire g with one of the binding-posts B, and pivoted to the upper end of the post N is a lever O, which extends above the rod L and terminates in a handle 0, on which may be inscribed the let- 3o ter represented by the character-disk on the shaft I). The lever O has also on its under side a rounded projection 0, which impinges on the head L of the rod L, so that when the lever is depressed the rod L and the shaft K 3 5 will be also depressed, and when the pressure upon the lever is removed the spiral springj will force the said parts upward.

The operation of the transmitter is as follows: "When the lever O is depressed, thus depressing the rod L and the shaft K, the washer Z, which is connected with the rod L, will be forced away from the hollow shaft, and, the current which passes through the post N, lever O, and rod L will be broken, so

5 that there will be no pulsations during the downward movement of the lever; but when the pressure on the lever is removed the spring j forces the washer against the hollow shaft K and the circuit is closed, the current passing from the rod through the washer and shaft to the pinion I, shaft D, and character-disk E, and the tendency of the shaft D'to turn with accelerating speed during the upward movement of the hollow shaft is checked by the pressure of the spring h on the eccentric disk H. It will thus be seen that the movement of the character-disk while the character is being sent is governed entirelv by the pressure of the spring j and the spring brake h, so that an even speed is maintained. The stop-screw k and the shoulder K on the hollow shaft are adjusted in relation to each other, so that the two parts will contact and the upward movement of the lever be checked at the completion of one revolution of the character-disk E and shaft D; but in Figs. 8 to 11, inclusive, I have shown a modified means of stopping the shaft 1) at the required time and also a different method of turning the character-disk. In the modified views the character-disk E is mounted loosely on the shaft D, and is connected with a circular plate P, which has one tooth in the edge, as is best shown in Fig. 11, the plate being also loosely mounted on the shaft, and the plate and character-disk being separated by an insulating-washer F, a similar washer being also placed on the opposite side of the disk, and the projecting points of the disk being made to extend beyond the washers. A hub 19 is fixed to the shaft D adjacent to the plate P, and from this hub extends radially an arm 1', the arm passing beyond the periphery of the plate P and having at its end a pawl t to engage the tooth of the plate, the pawl be ing held against the plate bya spring d, which connects with a rod 2 which is attached to the arm 1'. It will thus be seen that when the shaft D is turned in one direction the character-disk will not be moved, but when turned in the opposite direction the pawl will engage the tooth of the plate P, and thus turn the plate and the character-disk. The above mechanism is described in my former application and forms no part of my present application.

As shown in Figs. 8 to 11, the eccentric disk II is controlled by a spring h, which is fastened to the plate A, so as to press against the disk, and the disk has also a laterally-extending pin 7L2. A post Q, having its upper end split, as best shown in Fig. 10, is fixed to the plate A adjacent to the disk II, and pivoted in the slot of the post is the stop R, the rear end of which is inclined downwardly, as shown at R, and terminates in a stop-lug a", and the forward end of which projects from the post and is provided atits lower extremity with a hook r to engage the pin h of the disk, the stop having its front end weighted at the top, as shown at 0 so as to throw it normally into engagement with the pin on the eccentric disk.

A bent arm S is fixed to the shaft K, so as to extend through the slot j of the tube J, and the free end of the arm is made to extend above the inclined portion R of the stop R. It will thus be seen that when the shaft K is depressed to operate the transmitter the arm S will strike the inclined portion of the stop R, thus raising the hook 0" from the pin 7L2 and allowing the disk H and shaft D to turn; but when the pressure on the hollow shaft K is removed and it is allowed to spring upward in the manner heretofore described the arm S will be raised from the stop R and the weight o will cause the front end of the stop to drop into position to engage the pin 7& thus preventing the shaft D from making more than one revolution.

Having thus described my invention, I claim as new and desire to secure by Letters Patent- 1. A telegraph transmitter comprising a revoluble shaft carrying sending mechanism of the character described and having a pinion fixed thereto, a slotted tube arranged opposite the pinion, a spring 7 pressed shaft mounted in the tube and having one side formed into a rack to engage the pinion, and means for closing the circuit through the shaft-pinion and sending mechanism during the upward movement of the shaft, substantially as shown and described.

2. The combination, with the shaft having sending mechanism thereon and having a pinion fixed thereto, of a vertical spring-pressed hollow shaft having a rack thereon to engage the pinion, a rod extending through the 1101- ,low shaft and insulated therefrom, said rod having on its lower portion a washer to contact with the hollow shaft, and an insulatingwasher between the rod washer, and the spring, substantially as shown and described.

3. A telegraph-transmitter comprising a revoluble shaft carrying sending mechanism of the character described, a pinion fixed to the shaft, avertically-slotted tube arranged adjacent to the revoluble shaft, a springpressed hollow shaft mounted in the tube and having a rack formed thereon to engage the pinion, a rod extending vertically through the hollow shaft and provided at its lower portion with a washer to engage the hollow shaft and at its upper portion with a head, an insulating-washer between the rod-washer and the spring in the tube, and a lever for actuating the rod, substantially as shown and described.

4. The combination, with the revoluble shaft carrying sending mechanism, as shown, and provided with a pinion and with a disk having a laterally-extending pin, of a vertically-movable rack to engage the pinion and turn the shaft, a stop to engage the pin and limit the movement of the shaft, and means for releasing the stop ibythe downward movement of the vertical shaft, substantially as shown and described.

5. The combination, with the revoluble shaft carrying sending mechanism and provided with a pinion and with a disk having a laterally-projecting pin, of a vertically-movable rack to engage the pinion, a weighted stop pivoted in a support adjacent to the disk and provided with a hook to engage the pin of the disk, and a bent arm fixed to the vertical rack and adapted to engage the rear end of the stop, substantially as shown and described.

SAMUEL WESLEY SMITH.

Witnesses:

WARREN B. HUTOHINSON, G. SEDGWICK.