US307231A - sheeey - Google Patents

Description

3 Sheets-Sheet 1.

(No Model.)

B. 'J. SHEE HY. PRINTING TELEGRAPH.

PatentedQOct. 28, 1884.

INVENT'OR 1205621 JS/zeeky,

WITNESSES flit orneys By his N. PETERQY PhMo'L'MwK M Withing'on, 0,0-

(No Model.) 3 Sheets-Sheet 2.

, R. J.1SHEEHY.

- PRINTING TELEGRAPH. No. 307,231. Patented Oct. 28, 1884.

WITNESSES INVENTOR 6L i I Robert Jb'heeh lj N PETEBi vhmumu niw. Waihinglnn. u. c.

8 Sheets-" Sheet 3.

(No Model.)

R. J. SHEEHYL PRINTING TELEGRAPH.

No.'s07,2s1. Patented 001;. 28, 1884.

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N Pawns Pnawmm nmer. Wuhlngtun, 11c.

ST TE PATENT FFICE.

ROBERT J. SHEEHY, OF NEYV YORK, N. Y.

PRINTING-TELEGRAPH.

SPECIFICATION forming part of Letters Patent No. 307,231, dated October 28, 1884.

Application filed November 1, 1583.

To aZZ whom it may concern..-

Be it known that I, ROBERT J. SHEEHY, a citizen of the United States, and a resident of New York, in the county and State of New York, have invented certain new and useful Improvements in Printing Telegraphs, of which the following is a specification.

My invention relates to the construction of apparatus for revolving the type-wheel of a printing-telegraph reeeiving-instrument, by means of electric impulses of alternating polarity, devices for automatically effecting impressions therefrom, and for maintaining the typewheel in unison with the instrument'employed for transmitting the impulses thereto.

The object of the invention is both to simplify the construction of such an instrument and to render it more responsive to variations in the character and strength of the currents transmitted thereto.

The invemion consists in organizing the apparatus in substantially the following man- .ner: The type-wheel is revolved by the movements of an armature which is of peculiar con-- struction. This armature is polarized by induction, and responds to reversals in the polarity of the electric currents or impulses transmitted upon the main line. An inde pendent armature, responding to currents of whatever character, is employed for completing the circuit-connections of a local battery through the coils of the inducing electro-magnet. A neutral armature, responding only to prolonged impulses, is employed for effecting impressions from the typc'wheel, and a similar armature, responding subsequently to the printingarmature, causes thepapertape, upon which the impressions are received, to be fed forward. The unison of the type-wheel with the transmitting-instrument is effected by means of a detent carried upon an arbor, which is revolved step by step through the action of an armature especially designed for the purpose, and responding to the alternating electric impulses caused to traverse the main line. VVhen'the detent has been thus advanced to the limit of its movement, it stands in the path of a stop carried upon the type-wheel shaft. The revolution of the type-wheel shaft will thus be arrested and the type-wheel will be brought to rest in a predetermined position. For the purpose of preventing the type-wheel (No model.)

from being thus arrested during the process of printing, an armature responding to the prolonged impulses which are employed for actuating the printing-armature is employed for releasing the detent-arbor and permitting it to return to its starting-point. A retractile spring is employed for effecting such a return when the arbor is released. lVhen, however, a suflicient number of impulses are transmitted to the instrument without the intervention of a prolonged current, the detent will be brought into its advanced position, and will arrest the type-wheel in the manner described.

In the accompanying drawings, which illustrate my invention, Figure 1 is a front elevation of the complete instrument, and Fig. 2 is a side elevation of the same. Fig. 3 is a plan view, as seen along the plane 3 3, Fig. 1, and Fig. 4 is a front elevation along the plane 4 4, Fig. 2. Fig. 5 is an enlarged plan View of the instrument through a lower plane than that shown in Fig. '3. Fig. 6 is an enlarged front elevation of the complete instrument.

Referring to these figures, A represents the frame-work for supporting the various parts of the instrument, and B B' B represent two electro-maguets, which are supported in this frame, and which are provided with a back plate, B, of soft iron, common to both. The

. coils of the electro-niagnet B are included in the circuit of a local battery, 0. A conductor,

1, connected with one pole of this battery,

This armature-lever is designed to be controlled by the electro-magnetisrn generated by the impulses transmitted from the distant station through the coils of the electro-magnet B. The armature-lever carries at one extremity an armature, I)", which extends into proximity to a soft-iron band, I), encircling the coils of the leg 13*, of the electro-magnet B B", in a manner hereinafter described. At the other extremity of the armaturelever is carried a'contact-point, b, which is normally held away from the corresponding contactstop, I), by means of a suitable retractile spring, I)". hen, however, the electro-magnet B B is vitalized by the alternating currents traversing its coils, the armature b is heldin its forward position, the tension of the spring b being insufficient to withdraw it during the Lil rial-such, for instance, as brass.

is desirable to so construct the armature that its inertia shall be comparativelygreat. This may be accomplished either by making the armature large or by weighting it with nonmagnetic metal. The contact-point I) will thus be caused to rest upon the stop 71, which serves thus to complete the connections of the battery 0 from the armature-lever Z) through a conductor, 2, to the 'negatiyc pole of the battery, so long as the impulses of any character whatever are transmitted through the electro magnet B. The extension of the armature lever 7), which carries the contactpoint b, is preferably made flexible; for the purpose of insuring a continuous contact between the point Z) and the stop I) when the armature is in its forward position, even though it be caused to vibrate slightly onaccount of the changes in the polarization of the electromagnet. The circuit of the battery obeingin this manner completed through the electromagnet B, whenever the instrument is being employed for printing that magnet will be constantly vitalized, one pole, say N, being of north polarity and the opposite pole of south polarity. In front of the pole Xand in magnetic connection therewith is supported one extremity of a triai'igular soft-iron arn1ature, G. This armature consists of the upright portion 0, the lower end of which is pivoted at point, 0*, from which project two lateral arms, 0 and c, constituting an armature for the clectro-magnet B 13*. The portion 0", however, of the arm a, which is below the point of attachment of the lateral arms c and c, is preferably of non-magnetic mate- \Vhen, therefore, the electro-magnet B is vitalized, the upper extremity of the arm 0 receives by induction a polarization similar to that of the pole Nthat is to say, north. The extremities of thearms c" and c accordingly receive a polarization of the same character. The electro-magnet l3 B is included in the main-line circuitand is wound in the manner of an ordinary elcctro-magnet, so that a current of the character required to render the pole N north, will render the correspond ing pole, S south, and vice versa. Vhen, therefore, the pole l\ is thus rendered of north polarity, the arm a, which is, by induction, of north polarity also, will be repelled and the arm 0 will be attracted toward the corre sponding pole, S". When the polarizations of the. electro-magnct B B are reversed, the arm 0 will be repelled from the pole S and the arm 0 attracted toward the pole N. Thus, by transmitting alternating currents through the elcctro-1nagnet the armature G will be turned to and fro upon its axis 0. The movements of the armature thus occasioned are caused to advance a type-wheel, E, by means of an arm, 1*, secured to and moving with the arbor c. The arm F aetsthrough a double or centrally-pivoted lever, f, to alternately cause two pawls, f ,to engage two corresponding ratchet-wheels,f and f", which are secured to the type-wheel shaft (1. The leverfis pivoted at a point, f, to a portion of the frame A, while the arm l is pivoted between the points f and one extremity of the lever, as shown at It will. be seen thus that when the armature O is moved in the direction indica-ted by the arrow as, the pawl f will, by engaging, a tooth upon the wheelj", cause the typewhcel to be advanced a corresponding distance. Likewise, when the movement of the armature is in the opposite direction the pawl f", by engaging the wheel f, will cause another advancement of the typewheel, and at the same time the pawl 1" will be withdrawn so as to engage a succeeding tooth upon the wheel j". The alternate movements of the armature C will thus cause the type-wheel to be advanced step by s ep.

f and f, are provided for limiting their movements, respectively. When the typewheel has in this manner been advanced to the proper place for printing, an impression is effected upon a paper tape, G, by means of a printing-platen, h, above whichthe desired type has been caused to stand. The tape G is led through suitable guides, g and 1/ and between suitable friction-rollers, and y. The type-wheel may be caused to stand in any desired position by interrupting the series of alternating impulses, by means of which it is advanced, and if the impulse last transmitted be prolonged, sufficient magnetism will be induced in the core of the electro-magnet to cause an armature, h, to be drawn toward a polar extension, h. The armature h, however, will not respond to the series of alternating impulses which are employed for ad- ,vancing the type-wheeh-but only to prolonged impulses. The armature it is carried upon a lever, h, pivoted to the frame A, and at its extremity is carried an arm, h, upon which is supported the platen h. The movement of this armature in response to the increased magnetism of the electro-magnet 13, causes the platen ii to be carried against the paper tape G at a point between the guides r and and the paper is thus forced against the particular type on the periphery of the type wheel E, which has been caused to confront the sanie.

A second armature, 1*, similar to the armature h, is provided for effecting the advance ment of the paper when an impression has been made. This armature is applied to a polar extension, i", of the electromagnet B B, similar to the extension h", but it is preferably adjusted to respond less quickly than does the armature If. This maybe effected by supporting the armature i upon the extremity of a IIO lever, 1', which is pivoted in the same axial line with the lever h. The armature will thus act through alonger leverage and its movements will be less rapid. Advantage may also be taken of the fact that, after the armature h has been brought into proximity to its electro-magnet B B, the strength of magnetism manifested at the point 1; will be intensified because of the magnetic circuit thus partially completed through the respective cores and the back plate, B.

At the extremity of the armature-lever t" is carried ahooked pawl, i which acts upon a ratchet-wheel, i, carried upon the same arbor with the friction-wheel g. The movement of the armature-lever 6" toward the pole i causes this pawl to engage a tooth upon the wheel-i, and when the armature is released by the interruption of the prolonged current the movement of the armature-lever from the clectro-magnet acts through the pawl to advance the wheel and thus to advance the paper the proper distance.

For the purpose of eil'ecting a unison between the type-wheel and the transmitting apparatus whenever it is desired, the following means are employed for causing a detent to be thrust at will into the path of a stop carried upon the type-wheel shafte. This detent 7c is carried upon an arbor, k, of a ratchet-whcel, If. The ratchetwheel is caused to advance step by step during the transmission of alternating impulses through the clectro-magnet Pr B by means of a suitable pawl, which is pivoted upon an armature, m. The armature m is supported upon the frame A, and projects into proximity to an extension, in, on a sot'tiron band, I)", which surrounds the coil of the leg 13", and is similar to the band I), which has alreadybeen referred to in connection with the armature b". The armature m is normally held away from the projection or extension m by means of a suitable retractile spring, at", which is rendered adjustable by means of a tensionscrew, m, and banking-stop m, turning in a non-magnetic boss, m The armature is, however, so adjusted that it will respond to each of the alternate impulses of opposite polarity transmitted through the electro-magnet B B, and advance the ratchetwheel 7. accordingly. A suitable spring, is, is employed for pressing the pawl is? against the periphery of the ratchet-wheel, and asuitable dog, k pivoted to the frame A, serves to retain the wheel in its advance position in op position to the force exerted by a coil-spring, 7a. This spring surrounds the arbor 7.x, and tends to turn the wheel in the direction opposite that indicated by the arrow. lt will be evident thus that, when a suiiicient number of impulses are transmitted uninterruptedly, the detent 7. will be revolved until it'stands in the path of a stop, 6", upon the type-wheel shaft 6'. At this point the further progress of the ratchet-wheel is prevented by means of a suitable stop. If, then, the alternating impulses be continued the stop 6- will be revolved until it strikes the detent 7t, and the type-wheel will thus be arrested at its predetermined unison-point.

For the purpose of releasing the type-wheel from engagement with the detent it when it is desired, and also of preventing that detent from being carried into the path of the stop 7,: when printing is being effected continuously from the typewheel, a second armature, a, similar to the armature m, is applied to the band I)", which encircles the leg B of the elect 'o magnet B B. This band is similar to the band I), and is provided with a polar exten sion, n, and boss n, similar to the extension at and boss on. A retracting-spring, or", adjusting-screw a, and banking-stop a, similar to the correspondingparts described with reference to the armature m, are applied to the armature n. The armature )1 is likewise pivoted to the frame A, but it is adjusted so as to respond only to prolonged impulses or cur rents, such as are employed for actuating the printing mechanism. Both armatures m and n preferably extend into proximity to corresponding lugs, o and r", formed upon asoft-iron band, 1:, surrounding the electro-magnet B. When, however, such a current is transmitted through the electro-magnet B B,the armature a will be drawn toward the extension at and cause a bent arm, n, which is secured to the pivoted end of the armature and extends into proximity to the pawl 7.1 and detent or dog k to engage the same and throw them out of e11- gagement with the ratchetwheel 7.5". This wheel is then turned, by virtue of the spring 70*, in the direction opposite that indicated by the arrow, and the detent 7.: is thus carried out of the path of the stop 6-. Each time, therefore, that the printing of a character is effected or the tape is advanced a space, the ratchetwheel and detent will be carried to their starting-point,t"rom which they will be immediately again advanced by the alternating impulses.

In practice I prefer to so adjust the parts that a sutlicicnt number of impulses for advancing the type-wheel through, say, three revolutions shall be required to move the detent h from its resting-point to the position required for engaging the stop 0*.

Any well-known form of apparatus adapted to transmit electric impulses of the required character and duration may be employed as a transmitting-instrument for the apparatus described.

[ claim as my invention- 1. The combination, substantially as here inbcfo're set forth, ot'an electro-magnet, atypewheel, and type-wheel shaft, an armature responding to electric impulses of alternating armature applied to one pole of said electromagnet 'and responding only to prolonged electric impulses, a printing-platen actuated by said independent armature, a second indc pendent armature applied to the remaining pole of the electro-magnet and also responding only to prolongedimpulses, and a paperfeeding device actuated by the last-named armature.

2. The combination, substantially as hereinbefore set forth, of two electro-magnets, and an armature applied to one oi'said electro-magnets and polarized by the remaining clectro magnet, when said electro-n'iagnet is vitalized through the agency of a battery, the circuit of which is completed through the action of the first-named electro-i'nagnet when that electromagnet is vitalized.

3. The con'ibination, substantially as hereinbefore set forth, of two clectro-inagnets, an armature polarized by induction from one of said electromagnets and applied to the re maining electro-magnet, and a local battery the circuit of which is completed through the coils of the firstnamcd electroanagnet through the agency of an armature applied to the remaining electro-magnet, which armature responds to the electro magnetism induced in the electro-magnet to which it is applied by electric currents traversing its coils.

4. The combination, substantially as hereinbefore set forth, of two eleetro-magnets, an armature applied to one of said electromagncts, and normally polarized by induction throu h the action of the remaining electromagnet, a local circuit for vitalizing the lastnamed electro-magnet, a main-line conductor traversing the coils of the other electro-magnet, and a type-wheel caused to revolve through the action of electric impulses of alternating polaritytraversing said main line.

5. The combination, substantially as hereinbefore set forth, of an elcctroanagnet, an armature for said electro magnet, a typewheel caused to advance step by step through the agency of said armature in response to electric impulses of alternating polarity traversing the coils of said electrohiagnet, a stop carried upon the type-wheel shaft, and a detent for arresting said type-wheel in a predetermined position, a toothed wheel upon which said detent is carried, means, substantially such as described, for causing said de tent to be moved step by step into a position to intercept the said stop, and an independent armature applied to one of said electro-magnets and acting in response to prolonged electric impulses, to permit said detent to be withdrawn from the path of said stop.

6. The combination, substantially as hereinbefore set forth, of the type-wheel and typewheel shaft, a vibrating armature, a centrally pivoted lever, two ratchet-wheels applied to said typewheel shaft, and two driving pawls,

respectively applied to said ratchet-wheels and mounted upon said lever, by the move ments of which pawls said type-wheel is caused to advance.

7. The combination, substantially as here inbefore set forth, with a type-wheel and its shaft, of two ratchet-wheels carried upon said shaft, two drivingpawls respectively applied to said ratchet wheels, a centrally pivoted lever upon the opposite extremities of which said pawls are respectively carried, andmeans, substantially such as described, for causing said pawls to alternately engage the respective ratchet-wheels to which they are applied.

The combination, substantially as hereinbefore set forth, with an electromagnet, of a band of magnetic material surrounding the same, an armature applied to said band, a pawl, a ratchetwheel advanced step by step by the movements of said pawl, and means, substantially such as described, for releasing said ratchet-wheel from said pawl.

9. The combination, substantially as hereinbefore set forth, of an electromagnet, an armature applied thereto, which armature is caused, by means of a current of given polarity traversing the coils of said electro-i'nagnet, to be repelled from oncpole and attracted toward the other pole of said electro-magnet, and by means of a current of the opposite polarity to be attracted toward the first-named pole and repelled from the other, and two independent armatures applied to said electromagnet and responding only to currents of greater duration than required for actuating the first-named armature.

10. The combination, substantial] y as hereinbefore set forth, of a type-wheel, means, substantially such as described, for advancing said type wheel, a printingplaten, an electromagnet and its armature for causing said printing-platen to effect the impressions from said type-wheel, an independent armature applied to said electro-magnet, and a paperfeeding device actuated by said independent arn'iature.

11. In a printing-telegraph receiving-instrument, the combination, substantially as hereinbefore set forth, with a type-wheehan electro magnet, its armature, and means, substantiall y such as described, actuated thereby for advancing said type-wheel and for effecting impressions therefrom, of a paper-feeding device, and an independent armature for actuating said device, which armature is applied to said electro-m'agnet.

In testimony whereof I have hereunto subscribed my name.

ROBERT J. SHEEHY.

\Vitnesses:

N. L. COLLAMER, H. A. HALL.

IOU

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