US196476A - phejlps - Google Patents

Description

G. M. PHELPS. I Printing-Telegraph.

- No. 196,476. Patented. Oct. 23,1877.

- mm m I A ENT- OFF GEORGE. M. rnnnrs', or BROOKLYN, NEW YORK.

IMPROVEMENT m PRmime-T EG;RA.PHS.

Specification forming part of Letters Patent To all whom it may. concern: I Be it known that hfinonen M. Pnnnrs,

of Brooklyn, in; the county of Kings State of New, York, have invented an Improvement in Printing-Telegraphs, of which the following is a specification: I

Printing-telegraphs have been made with an escapement that allows; the clock-work to turn the type-wheel, such escapement being actuated by an armature andopposing magnets, through which electric currents are passed, of alternate polarity, and the magnet controlling the printing has been brought into action by stopping the type-wheel for the letter desired. In this instance the type-wheel magnets and printing-magnets are in the mainline circuit, and the resistance is great upon lines where there are a number of these instruments in the same circuit.

The object of my invention is to lessen the resistance in the line, and thereby allow for operating the instruments with a less batterypower.

To effect these objects I provide an automatic switch, that becomes self-acting when a pause occurs in the movement of the typewheel, and cuts out the type-wheel magnets, and simultaneously closes the circuit to the magnet that liberates the printing mechanism; and as this mechanism operates, the circuit is again closed to the type-wheel magnets and broken to the printing-magnet. By this arrangement of devices the resistance of the line-circuit is lessened, because there is only the type-wheel magnets in the circuit or the printing-magnet.

In the drawing, Figure 1 is a plan of the instrument; Fig. 2 is a side view with portions of the gearing and frame removed, and the wire connections of the magnets are also shown. Fig. 3 represents the circuit-changer after the printing mechanism has operated, and Fig. 4 is an elevation of the ratchet-wheel and its spring.

The type-wheel a is upon the shaft 1), that is supported in the frame 0, and driven by any suitable train of gearing, d, and a weight or spring. The escapement f and armature g are moved, first one 'way and then the other, by the electro-magnets g, between the cores of which the armature g vibrates. The shaft h n 196,;226, dated May 9,1877...

October 23, 1877; itPPlfiGiLlilOllfl-ld is. revolved by a train of gearing,'k, and at the end of said shaft is a wrist-pin or crank, .2',ftl'1at gives motion tothe printing-lever Z. These parts are similar to those shown in former patents granted to me,and a reference Tismade to my Patent No.'144,285 for a more full' description and representation of the conjstruction and operation of these parts. I how- .ever remark that my improvement, hereinafter describechinay be used with other printing-telegraphs wherever available.

The shaft m has upon it an arm, 'n, and spring circuit-closer 4, that is. between the two screw-points 5 and 6, that are upon the insulated blocks 0 and p, to which the circuitwires 8 and 9 are connected. The line-wire 10 is connected with the frame of the machine, and when the arm n is in contact with 5 the current passes through 8 to the type-wheel magnets g g, and-thence to the line 11, to the next instrument, or to the battery, as usual; but when the arm n is moved into contact with 6, the current passes from 10, by frame and a, to 6 and 9, to the magnet s, and to the line 11. This magnet s has an armature, s, and lever t, that holds the tooth 12 on the shaft h, as in my aforesaid patent but as soon as the electro-magnet s is energized, the hooked lever t is moved, and the shaft 71. and clock-movement liberated, to print the character from the typewheels.

The shaft m has also upon it the double pawl-lever a, one end, 18, of which is near the ratchet-wheel 0; upon the type-wheel shaft b, and the other end, 19, is near the spring-finger 20, that is adjacent to the cam 15 on the shaft h.

The operation is, that when the type-wheel is being revolved, the ratchet wheel 11 conand maintains contact of the spring-arm 4 with the point 5, keeping the circuit through the wire 8 and type-wheel magnets 9 closed; but as soon as the rotation of the type-wheel and arm n, by partially turning the shaft m, so as to press the pawl 18 in between the teeth of o, and close the circuit through at and 6 to the wire 9 and press-magnet s, the energizing of which latter liberates the shaft h, which re volves, performing the printing, and, by the cam 15 acting against the spring-finger w,

stantly presses the end 18 of the lever it away,

is arrested, the spring 20 swings the lever u places the same in :the position shown in Fi g". 7 r 3, with its inolinecl knife-edge end in a shah 10w notch aeross the end 19 0f the lever In this movement the inclined endof thespringfinger 'w, acting ageinsnthe inolinedexicllQ of In the move ment, however, of the lever u, theipewl end 18 V I is not ent-irely :cleer'ofihe beet-hot the ratchet Wheel: a! henee, when the typewheel starts, 1

thetoothof-o, Fig", 3, moves thelever u enough 7 to unlatoh the spring-zfingenw, and that re- 1 VSHIHG'S its normal positionywhown in Fig'L'f JJ V and the parts arrexreacly for action, as before '(lBSGIib6LI r r r ratchet-wheelie loose r upon the shaft 11,; and provideepin, 2.2,there- 7 I on, that is helcl hetween' the spring" 23 and 2m. 7 V arm, 24, that is @mmpea firmly to the sheftwby 2 theserew25,

I prefer to place the This allows for: "adjusting the Wheel 1? to its correct @osition, and also allows V r a slight yielding movemenbin the direction of r 7 its rotation, so bhat the impact aml friction between the point: of the pawl 18 and the sun "face of the teeth maynot impede the free 10- cation of the type-wheel. I '7 V I elaim as.my-invention-+ r same, a circuit-changer; operated by a eonnew:

tion to the type-wheel shaft, for controlling" 7' the-printing electrically when the; type-wheel 7 .stops', substantiallyas'set forth 2. Theeombinaisiomin a printingtelegraph instrument, of mechanical power to revolve other type-wheel and to; actuate: the printing: 1 device, an escapement actuated byrma gnet-o' i ism-t0 set the type-Wheehan eleetro-lnagnet 1 to bring theprinting mechanism-into eeti0n,= V anil a, mechanical circuit-changer to eenneeh 71'', :the type-Wheel magnet iso Jzhe main lineand; I

1 disconnect :the impression-magnet, and vice V verse, substantially as set forth; V V 3. Theratehet wheel :1,.pewliever weeping-- fingeriw, 0am 15,an(l circuit-changer w, in conn i Z bination with the typewheelend actuating? Y shaft, and the impression mechanism and its 1 aetueting shaft,substantiallyas set forth. Signed by me this ifith day of April, A,

' Wiiznesses: V GEOXLPINGKNEL; 7 CHAS. H. SMITH.-

'1, In azprinting-telegmph instrument hem- V V V 7 ing a mechanical powerrfor revolving the type- I ,7 wheel, andan eleetremagnet for setting the r

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