US316855A - Bergh - Google Patents

Description

(No Model.)

H. VAN HOEVENBERGH.

UNISON FOR PRINTING TEL'EGRAPHS.

No. 316,855. Paten d Edy-2; 28, 1885.

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NITED STATES PATENT I Erica HENRY vAN HOEVENBERGH, or ELIZABETH, NEw JERSEY, ASSIGNOR To THE EALTIM EE 8101110 TELEGRAPH COMPANY, on BALTIMORE, MD.

UNISON FOR PRlNTlNG-TELEGRAPHS SPECIFICATION forming part of Letters Patent No. 316,855, dated April 28, 1885.

Application filed August 7, 1894. (No model.)

My invention relates to the class of appa IO ratus employed for maintaing the type-wheels 1 of a printing-telegraph instrument in unison with the transmitting apparatus.

The object of the invention is to provide a device which, while allowing the printing to 1 be continuously effected from one of the typewheels, will be gradually moved into position to arrest the same at their unison-point when printing is effected from the other type-wheel.

The invention consists in constructing the apparatus in substantially the following manner Two type-wheels are loosely mounted upon a shaft, and are normally coupled thereto by means of a ratchet-wheel and a click engaging the same. The ratchet-wheel is se 2 5 cured to the type-wheel shaft,while the click or dog is carried upon one of the type wheels or the sleeve carrying the same. A double platen, consisting of two platen-faces projecting from each'other at an angle, is provided 0 for effecting impressions from the respective type-wheels. An electro-magnet is employed for controlling this platen, so that the one platen-face may be presented to the one typewheel-or'the other platen-face to the other 3 5 type-wheel at the will of the transmitting-operator. A device for engaging the retainingclick and forcing it out of engagement with the ratchet-wheel, thereby releasing the typewheels from the type-wheel shaft, is also con- 40 trolled by the movements of the armature-lever employed for controlling the movements of the platen. For this purpose the arm for releasing the retainingclick is frictionally supported upon a suitable arbor, and is pro- 5 vided with a series of ratchet-teeth, which are designed to be engaged by a corresponding pawl during the operation of printing from one of the type-wheels, preferably the typewheelcarrying numerals. This pawl is carried upona' frame pivoted to the printing-lever, and this frame is normally held in such tooth of the ratchet-bar.

a position that the pawl will not engage the teeth of the ratchet-bar. IVhen, however, the platen has been moved so that an impression is taken from the figure type-wheel, the frame 5 5 is thrown into such position that the pawl will engage the ratchet and move the arm forward through a distance corresponding to one This operation will be repeated for each downward movement of the'press-lever after effecting an impression from the figure typewheel. The parts are so adjusted that if a given number of impressionssay,four-be taken from the figu re typewheel in' succession the unison-arm will-be'in position to engage the locking pawl or click, and to thereby force itout of engagement with the ratchet-wheel carried upon the type-wheel shaft. If, therefore, the escapement employed for advancing the type wheel be actuated when the releasing-arm is in this position, the type-wheels will be unlocked from the shaft and be retained at their unisonpoint. It will be necessary, therefore, only to effect four impressions in succession from the figure typewheel, and to then revolve the type-wheel shaft through one complete revolution, in order to insure that the type-wheels are at their unison-point. By then effecting an impression from the letter type-wheel the releasing or 8 unison arm will be withdrawn from the .path of the retaining-click, and the typewheels will be again locked to the shaft. In practice it is seldom desired to effect more than three impressions from the figure. typewvheel with- 8 out the intervention of a punctuation-mark, orof a character carried upon the letter typewheel.

In the accompanying drawings, Figure 1 is a side elevation of such parts of a printing- 9o telegraph instrument as are necessary to illustrate the invention, and Fig. 2 is a plan view of the same. Fig. -3 is aside elevation showing the position of various parts of the instrument duringthe operation ofeffectingaunison. 5

Referring to these figures, A represents the type-wheel shaft, upon which are carried two type-wheels, B and G. The type-wheels are rigidly supported upon asleeve, 0, loosely surrounding the type-wheel shaft. Upon this shaftisrigidly supported a toothed wheel, d, the teeth of which are designed to be engaged by a click or pawl, e. This paw], therefore, normally locks the type-wheels to the shaft, which is designed to be advanced step by step in any well-known manner. The pawl is pivoted to one of the type-wheels O, and it is provided with an extension, e,'carrying a projection, 6 This projection is designed to be engaged by a unison-arm, K, when it is desired to arrest the type-wheels at their unisonpoint, in a manner which will be hereinafter described. One of the type-wheels, B, is designed to carry the more important letters and certain marks of punctuation, while the other type-wheel, O, is intended to carry figures and such other characters as are less frequently employed. The impressions are effected from these type-wheels, respectively, by means of two platen-faces, g and g", which are carried upon a double platen, G. The platen G is pivoted to a press-lever, H, which is actuated by means of an electro-magnet, M. The platenfaces 9 and g project from each other at a slight angle, so that but one of the same can be presented to its type-wheel at a time, and an impression will therefore be effected, when the press-lever is actuated, from the typewheel B or G,accordingly as the face or g is presented to its type-wheel, it being understood that the platen-faces are respectively in the planes of the corresponding type-wheels.

For the purpose of controlling the position of the platen G, an electro-magnet, m, is employed. This electro-magnet is designed to be in the same circuit with the electro-magnet M; but its armature-lever m responds only to currents of greater strength than those employed for actuating the press-lever H through the instrumentality of its electro-magnet M. When, therefore, it is desired to effect impressions from the type-wheel B, the armature-lever m is allowed to remain in its position away from its electro-magnet,and the currents employed for actuating the press-lever are of less strength than is required for actuating the armaturelever m. When, on the other hand, it is desired to effect impressions from the type-wheel O, currents of greater strength are employed than are necessary for actuating the press-lever H, and the armature-lever m also responds to these currents. A link, m couples the armature-lever m to the platen G. When, therefore, the armaturelever m is drawn toward its electro-magnet m, the platen G is turned upon its axis, so that the face g is turned at an angle to the confronting portion of the type-wheel B, while the platenface is turned toward the type-wheel C. An impression will therefore be effected under these circumstances from the type-wheel C only.

The change in the position of the lever m, for the purpose of effecting impressions from the type-wheel O, is employed, also, for throwing a pawl, Ir, into such position that it will engage a tooth of a rack, carried upon the unison-lever K. During the return move ment of the press-lever, after effecting an impression from the figure type-wheel, the pawl moves the unison-arm K downward toward the path of the projection 6 and thus toward the position which it occupies when it serves to release the type-wheels from their shaft. For this purpose the pawl '70 is carried in a frame, L, which is pivoted to the presslever H. The frame L is provided with two arms, a and of, the one of which carries the pawl 70, while the other carries a catch or pawl, k which is designed to return the unison-arm to its normal position when the lever falls, after effecting 'an impression from the type-wheel C, in a manner hereinafter described. The frame L is pivoted at a point, if, to the lever H. An extension, 10, projects from the frame L below the lever H, and the end of this extension is beveled in opposite directions, as shown. Applied to this extension is a spring, 10, carrying a beveled point, 10 which is designed to hold the frame L either in the position shown in Fig. l or in the position indicated in Fig. 2 until itis forcibly moved therefrom. For the purpose of moving the frame L from one to the other of its positions, a pin or projection, q, is carried upon the armaturelever m, and this pin is designed to engage the beveled side of a projection or catch, g, carried upon the frame L, when the armature is moved toward its electro-magnet for the purpose of printing from the figure type-wheel 0. Normally, the point q is out of the path of the projection q; but when the press-lever is actuated by means of a current of sufficient intensity todraw the armature-lever m forward, not only will the frame L be moved upward, but the point q will be moved forward into position to press against the projection q before the lever H has completed its upward movement, and to thereby turn the frame L upon its pivot, and cause the catch is to engage the rack k. The electro-magnet m is for this purpose designed to act more quickly than the electro-magnet M, although responding only to currents of greater strength than are required for actuating the latter. The point q will, therefore, by striking the beveled side of the projection q, turn the frame L upon its axis, so that the pawl is will engage one of the teeth of the rack k. The subsequent downward movement of the lever H and frame L will cause the arm Kto also descend through the space corresponding to that occupied by one tooth of the rack-bar. The frame L will be held, by means of the spring 1) and point 19 acting upon the extension 1), in the position which it has been caused to 00- cupy by reason of the armature-lever m until it be forcibly removed therefrom. For the purpose, however, of throwing the pawl is out of engagement with the rack when it shall have advanced the same, a projection or stop, 4, extends from the arm n of the frame L, and this projection is engaged, when thelever H is near. the lower limit of its "movement, by meansof a pin or stop, 1". If, therefore, the lever of frame L be turned into the position shown in. Fig. 3, it will, when the lever H has descended nearly to its limit of movement, be tipped or turned back to its normal position by the contact of the projection rwith the pin r. The pawl it will thereby'be thrown 'out of engagement with the rack. If, however, the

succeeding impression is taken from the type-, wheel. 0, the operation .will be repeated, and the arm K will be drawn downward another tooth. The arm K-will be securely held in the successive positions which it is caused, to

occupy by means of a friction-clutch, y, applied to its axis It is designed that four such movements shall throw the arm K into such position that its extremity k will engage the extension 6 upon the pawl e, or be in the path to intercept its revolution, and to there-: by throw it out of engagement with the ratch et-wheel d. If, therefore, the type-wheel shaft the revolved, the type-wheel will be arrested, at a predetermined unison-point in this main ner.

polarized; armature commonly employed for actuating the escapement of a printing-telegraph instrument becomes reversed under the influence of an abnormally strong current.

The positions subsequently occupied by the polarized armature in this instrument be reversed, the type-wheels will be set right when they have been brought to unison and are.

again locked to the shaft.

For the purpose of withdrawing the arm K from the path of the click the catch k is employed. This catch projects into the path. of a pin, .8, carried upon the short arm of ,the lever K, when the frame L is in the position shown inFig. 1. If, therefore, the frame L be allowed to descend in this position,the pawl It will engage the pin 8 and return the lever K to its normal position.

For the purpose of preventing the pawl from actuating the lever during the upward movement ofthe frame L, the pawl k may be pivoted to the arm, as shown at 's, in such a manner that it will turn backward a sufficient distance to allow it to pass the pin. Likewise the pawl k may be pivoted to the arm n, as shown at 8 so that it will not move the lever K during the slight upward movement which it may receive after it has been forced into the rack The elasticity of the spring p may, however, be relied upon for permitting a sufficient movement of the frame L for effecting both these movements.

In an application of even date herewith, Serial No. 139,884, there is shown and described It sometimes occurs that the polarity of the It will be i a unison device which is brought into action throughthe instrumentality of the printinglever. Such an organization, however, is particularly claimed in this application, rather than the one referred to.

I claim as my invention- 1. The combination, substantially as hereinbefore set forth, of a type-wheel shaft, two type-wheels carried thereon, a locking device for coupling said type-wheels to said shaft, a press-lever for effecting impressions from said type-wheels, a unison-arm which remains at rest while impressions are effected from one type-wheel, and means, substantially such as described,,for moving said unison-arm into a position to unlock said type-wheels when impressions are taken from the other type wheel.

2. The combination, substantially as hereinbeforeset forth, with a type-wheel shaft and two typewheels carried thereon, of a device for locking said type-wheels to said shaft, a unison-arm for unlocking said type -wheels and arresting them at their unison-point,a press-lever for effecting impressions from one or the other of said type-wheels,and a device, caused by the movements of said press-lever when impressions are being taken from one of said type-wheels, to move said unison arm into position to unlock and arrest said typewheels.

3. The combination, substantially as hereinbefore set forth, with atype-wheel shaft and two type-wheels, of a device for locking said type-wheels to said type wheel shaft, two platen faces which are respectively applied to said type-wheels, an electromagnet for causing one or the other of said platen-faces to be presented to its type-wheel accordingly-as said electromagnet is or is not vitalized, an arm for releasing said shaft from said typewheels, and means, substantially such as described, serving to move said arm into position to so release said shaft when 'a given number of impressions are successively effected from one of said type-wheels, but not to so operate when impressions are effected from the other of said type-wheels.

4. The combination, substantially as hereinbefore set forth, with two type-wheels and a type-wheel shaft, of two platen-faces respectively applied thereto, an electro-magnet for causing one or the other of said platen-faces to be presented to its type-wheel, an arm for arresting said type-wheels at their unisonpoint, and a pawl for actuating said arm, which pawl is caused to engage said arm when said electro-magnet is vitalized.

5. The combination, substantially as hereinbefore set forth, of two type-wheels, a printing-lever for effecting impressions from said type-wheels, an electro-magnet for determining from which of said type-wheels impressions shall be effected by said lever, a unisonarm for arresting saidtype-wheels at their unison-point, a pawl which is caused to engage said unison-arm and to advance it into a position to arrest said type-wheels when said electro-magnet is vitalized, and means, substantially such as described, for disengaging said pawl from said arm when it has advanced the same after an impression has been effected.

6. In a printing-telegraph instrument, the combination, substantially as hereinbefore set forth, with a press-lever and a unison-arm for the type-wheels, of a pivoted support carried upon said press-lever, an electro-magnet, its armature and armature lever, which armature-lever is normally out of the path of said support, but which, when actuated, serves to turn said support upon its axis, and a pawl carried upon said support, which pawl, when the support is thus turned, engages said unison-arm and advances the same a predetermined distance each time said press-lever is actuated.

7. The combination, substantially as hereinbefore set forth, with two type-wheels and a press-lever for effecting impressions therefrom, of a unison-arm applied to said type Wheels, a pawl for engaging said unison-arm, which pawl is normally out of the path of said unison-arm, means, substantially such as described, for causing said pawl to engage said unison-arm and to advance it a predetermined distance during the movement of said lever away from said type-wheels, and a stop for throwing said pawl out of engagement with said arm each time it has so advanced the same.

8. The combination, substantially as hereinbefore set forth, with the printing-lever of a printing-telegraph instrument, of a unisonarm, a ratchet carried thereon, a support pivoted to said printing-lever, apawl carried up on said support, an electro-magnet, astop operated by said eleotro-magnet for causing said pawl to engage said ratchet during the upward movement of said printing-lever, and a second stop for causing said pawl to be disengaged from the ratchet during the downward movement of said printing-lever.

9. The combination, substantially as hereinbefore set forth, with the printing-lever H and the unison-arm K, of the frame L, pivoted to said lever, the pawl is, carried upon said frame, the ratchet carried upon said unison-lever, and means, substantially such as described, for causing said pawl to engage said ratchet.

10. The combination, substantially as hereinbefore set forth, oftwo type-wheels, a printing-lever for effecting impressions from said type-wheels, a unison-arm applied to said type-wheels, a pawl actuated by said presslever for moving said unison-arm into position .to arrest said type-wheels, an electro-magnet for controlling the position of said pawl with reference to said unison-arm and for advancing the same into position to arrest said typewheels when impressions are taken from one of the same, and a second pawl actuated by said printing-lever and serving to move said unison-arm out of the path of said type-wheels when impressions are effected from the other type-wheel.

11. The combination, substantially as hereinbefore set forth,with a type-wheel shaft and two type-wheels carried upon the same, of a ratchet-wheel secured to said shaft, alockingpawl moving with said type-wheels, which pawl normally locks said type-wheels to said shaft, and a unison-arm serving to mechanically engage said pawl, and thereby disengage said type-wheels from said shaft,and to arrest them at their unison-point.

12. The combination, substantially as hereinbefore set forth, of a type-wheel shaft, a ratchet-wheel applied to said shaft, two typewheels loosely mounted upon said shaft, a pawl for looking said type-wheels to said shaft, and a unison-arm for mechanically engaging said pawl, thereby unlocking said type-wheels and arresting them at their unison-point, substantially as described.

13. The combination,substantially as hereinbefore set forth, with two type-wheels, the one carrying letters and the other carrying figures, of a unison-arm, and means, substantially such as described, for causing said unison-arm to arrest said type-wheels at their unison point when four successive impressions have been taken from said figure typewheel.

14. The combination, substantially as hereinbefore set forth, in a printing-telegraph instrument, of a figure type-wheel and a letter type-wheel, a unison-stop, and means for operating said unison-stop when impressions are effected from said figure typewvheel.

15. The combination, substantially as hereinbefore set forth, in a printing-telegraph instrument, of two type-wheels, means for effecting impressions from either of the same, a unison-stop, and means for operating the same when printing is effected from one of said typewheels.

16. In a printing-telegraph instrument, a unison-stop and mechanical means for bringing the same into action by the printing-lever.

17. In a printing-telegraph instrument, a unison-stop and mechanical means for bringing the same'into position to unison the instrument by the movements of the printing-lever.

In testimony whereof I have hereunto subscribed my name this 26th day of June, A. D. 1884.

HENRY VAN HOEVENBERGH. [Ls] Witnesses: DANL. W. EDGECOMB,

CHARLES A. TERRY.

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