US313973A - Type writing machine - Google Patents

Type writing machine Download PDF


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US313973A US313973DA US313973A US 313973 A US313973 A US 313973A US 313973D A US313973D A US 313973DA US 313973 A US313973 A US 313973A
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    • B41J13/00Devices or arrangements of selective printing mechanisms, e.g. ink-jet printers, thermal printers, specially adapted for supporting or handling copy material in short lengths, e.g. sheets
    • B41J13/02Rollers
    • B41J13/036Rollers co-operating with a roller platen
    • B41J13/042Front and rear rollers or sets of front or rear rollers each mounted on a separate carrier


(ModeI.) 5 sheets-sheet 2.
. G. W. N. YOST.
No. 813,973. PatentedM211.Y 17, 1885.
(Model.) f5 sheets-sheet 3.
G. W. N. YOST.-
TYPE WRITING MACHINE. No. 313,973. #Panted Mar. 17, 1885.
(Model.) 5 sheetssheet 4.
G. W. N. YOST.
TYPE WRITING MACHINE. No. 313,973. A Patented Mar. 17. 1885.
. lum
(Model.) 5 Sheets-Sheet 51.
- 1. W. 11. YosT.
No. 313,973. Patented 116.1. 17, 1335.
N. PETERS. PmmLimogmphcr, wnhmgwn. D. c.
the latter is visible. At the center of the scale Q is a pointer, Q, which extends over the graduationon the scale A5.
Q2 are guide-strips ofthin metal,curved concentrically to the surface of the platen P, attached to the scale Qin front ofthe platen.
Qare similar strips,attached to the papertable G, behind the platen.
H is a lever of the second class, to rotate the platen P, and, if desired, to return it to its original position. lts fulcrurn is at one end, where it surrounds the bushing P4 on the guide-rail D, between the ratchet-wheel P6 on the left-hand end of the platen and the frame of the paper-carriage. rlhe other end ot' the lever H is bent down in front ofthe top plate ofthe machine a short distanceabovethe keys. At a distance of about onethird the length ef the lever from its fulcrum is attached apawl, J, by the screw H2,upon which it turns. One endJ,of the pawl J engages with the teeth of the ratchet-wheel Pf. The other end isl extended behind the curved arm of the lever H and nearly concentric with it. The extreme lower ends of both the lever and the pawl are curved, so they present convex surfaces to each other, the one to fit a thumb and the other a finger of the operator. The lower end of the pawl J is bifurcated. Between its forks, pinned at J2 so as to swing at right angles to it, is a latch, J, which slips through a slot, H3, in the lower end of the lever H.
JT is a spring, screwed to thefront of the lower end of the pawl J, which bears against the under side of the lever H, and tends to keep the lever and pawl apart, as shown in Fig.-3. The front end of the latch J3 has a projection, J -which prevents it from being drawn out of the slot Hand which also limits the distance which the lower arms of the lever and pawl can be moved apart.
- JG is a spring, fastened to the under side of the latch J5, which, when the lower arrns of the lever and pawl are brought as near together as possible, and the end J of the pawl J engages with the teeth of the ratchet-wheel P5, pushes up the latch J5,and holds the lever and pawl fast, as is shown in Fig. 4.
J8 is a pin driven in at right angles to the outer side of the pawl J, near its upper end. Vhen the platen is rotated by the lever H and Vpawl J, as hereinafter described, the pin Jli comes in Contact with the upper edge of the frame of the paper-carriage, a short distance in front ofthe table G.
E is a lever of the first class, to reverse the paper-carriage and rotate the platen for line spacing. lts fulcruin is on a screw, Ef, attached to an upward projection in the rightliand front corner of the paper-carriage N. rlhe lower arm, E2, of thelever E is bent down in front of the top plate, A, and is curved at its extremity, so as it may be easily grasped by the linger of the operator. Its upper arm rises above the platen P, and is curved concentrically thereto.
F is a line-space regulator, attached by the screw F' to the outer-side of the carriage lever E at its upper end.
F2 is a handle projecting at right angles from the linespace regulator F,by which the E5 is a spring rigidly inserted in the pawl Ei near the screw Et, which presses against a pin lnojecting from the carriagelever E, and holds the pawl E toward the teeth ofthe ratchet-wheel P5.
E5 is an angular projection on the under side of the pawl E5, which, when the upper arin of the carriagelever E is raised, bears against a projection, N, on the upper portion of the upright extension of the frameN ofthe paper-carriage, and holds the pawl E5 out of contact with the ratchet-wheel, P5.
El is a spring fastened to the projection N6, which bears upward against the under surface of the upper arm of the carriagelever.
E5 is a springpawl fastened en the under side of the papercarriage, whichengages with the ratchetwheel P5 and tends to prevent its reverse rotation.
L is a series of levers of the first class on a rod, L. These levers have keys L2 o 1 their front ends, and at the back rest on a bar, B5.
L3 is a series of reeds, set vertically in the IOO bar B5, between which the key-levers vibrate.
LaL are rods communicating the motion of the key-levers L to the typebars Lf. Each connecting-rod is screwed into a nut, L, which is attached by a pin passing through projecting The upears on its lower end to a key-lever. per end of each connecting-rod is soldered to a U-shaped strip of metal in the ends of the 'ai-nis of which are bearings which tit upon trunnions on a type-bar.
L6 are a series of type-bars, each pivoted at one end at L8 in a hanger, L", attached to the top plate, and each carrying a type, LT, in its other end. lengths, and the hangers in which they are pivoted are so arranged in two rows concave to each other that each type-bar,when raised, will c'a-use a type to be impressed on the platen over a common point. The connectingrods L are attached to the type-bars a short distance from their fulcruin, so that thelatter are levers of the third class. p
M is a bar underneath the key-levers, in front of the rod L.
M are keys attached at either end of the bar M, which project beyond the base of the machine.
The type-bars are of different M2 are metalarms `fastened by screws to the i under side of the bar M, and rigidly attached to a rock-shaft, Migwhich is supported on pivots M4 in the frame B beneath, fand in t-he same vertical plane` with the downward projecting portion N of the paper-carriage.
O is an upright arni attached to the rockshaft M3, between the arms M2, and nearly at right angles to them.
O is a knife-edged dog, hinged on a pin, O, in the upper end of the arm 0.
O3 is a weight attached to the lower part of the dog O-, which tends to hold its lower arni in contact with the upright O and the knifeedge O perpendicular to the rock-shaft M. The dog O is capable of partial rotation in a plane at right angles to that of the arm O.
M5 is a steel spring, attached on the under side of the bar B2 by a screw, Mthe free end of which presses on the under side of an arm on the rock-shaft M3,in front of the rock-shaft, and actsl to hold the arms M2 and the har M up against the bottom of the key-levers.
M7 s a spring, similarly attached, which presses on the back of the spring M2, and assists in regulating its tension.`
S is aspace-key, so called,in the center of the front ofthe key-board,attached to a double lever, S', which has its fulcruin,with the typelevers, on the rod L. The under side of the lever S rests upon the space-bar M.
S2 is a pin extending perpendicularly beneath the space-key S, and entering a hole in the frame ot' thevlnachine. It serves as a guide for the key S and as a support for a spiral spring, S3, which tends to hold the key S and lever S in their upward position.
R is a rack screwed with its teeth downward to the lower portion of the paper-carriage, parallel with and directly under the axis of the platen.
T is an angle-bar connecting the lower projections, N, of the paper carriage, fastened thereto by screws, and lying over and parallel to the rack R.
. T is a rack havingteeth similar to the rack R, suspended on two links, T2, which are snpported on screws T1s in projections from the upper surface of the bar T. The rack T is capable of a reciprocating movement parallel to the stationary rack It for a distance equal to that between two of its teeth.
T4L isa small spiral spring, fast to the rack T at one end and to the rack R at the other, which acts to draw the rack Tin the direction of the forward movement of the papercarriage-viz., that of the arrow, Figs. 6 and 7.- Vhen the guide-rail and paper-carriage are in their normal position, the dog O engages with the rack T.
N7 is a hook on the under side of the lefthand end ofthe paper-carriage, over which is passed the end of a strap, K2, communicating with a spring-cam.
K is a cam in the same plane with the racks R and T, loose upon an axle which is supported in hangers BG, projecting from the base of the frame.
K2 K3 are collars held on either end of the axle of the cam K, which prevent any endplay- K4 is a wormgear ou the front side of the collar K3.
K5 is a worm inl a bearing on the hanger B2, which meshes into the wor1n-gear Kt.
K is a crank screwed on the end of the worin-shaft K5, which also serves as a collar. Wlithin the cani K is a coiled spring (not shown in the drawings) one end of which is fastened to the axle on which the cam K turns andthe other end to the cani itself. The spring acts to turn the cani in the direction of the arrow` Fig. l.
KT is a strap attached to the papenearriage, which wraps around the periphery of the cani K, and transmits the motion of the cani to the paper-carriage.
U is a shaft running longitudinallythrough the center ofthe axle otl the earn K and turning` freely therein.
`U is a beveled gear on the shaft U, a short i distance in front of the collar K3; ,U2, a similar beveled gear on the shalt U, back of the collar K".
U? isa ratchet wheel fast on the hnbof the gear U2.
U2 U5 U are three grooves in the front part of the shaft U.
UT is a crank on the frontend of the shaft U.
Ks is a pawl which engages with the ratchet-wheel U3, and turns on a stud which projects from the back' side of the cam K, on which is a spiral spring which holds the pawl in contact with the ratchet-wheel U2.
V and W are horizontal shafts supported in bearings V W in the frame B, just above the key-levers. The shaft Vis in front ofthe rods L, which connect the key-levers and the type-bars. The shaft Y is behind them.
V2 is a beveled gear ou one end of the shaft V, into which the gear `U on the shaftU may mesh.
W2 is a similar gear on the end of the shaft WV, into which the gear U2 may mesh.
VL is a latch which turns on a stud, V3, projecting horizontally from the bearing V. spiral spring on the stud V3 presses the outer end ofthe latch V4 upon the shaft U, at which point is a groove which fits into the grooves U4 U5 U(i in the shaft U.
X and Y are spools, respectively on the shafts V and W', on which an hiking-ribbon, X. is wound. The ribbon passes from the spool X over a flattened space, X X, on the front of the top plate, thence across the top plate to the spool Y. The spools AX and Y have each a spline which fits in a longitudinal groove in the shafts V and XV, so that the spools rotate with the shafts, but may also move endwise thereon.
X2 is a slotted disk, fastened by screws o the hub of the spool X.
X3 is a sleeve on the shaft V, having flanges X4 X5 on its ends. The flange X5 is between the hub of the spool Xand the disk X2. This flanged sleeve forms an extension of the hub of the spool X.
Y3 is a similar sleeve, with flanges Y4 and Y5 on the rear shaft, XV, connected with the spool Y.
Z is a shaft running in bearings in the frame of the machine, transversely to the shafts V and W, at the right-hand side of the machine.
Zl is an arm on the front end of the shaft Z, having a crotch, Z2, inserted in it at right angles, between the arms of which the flange X* turns. The upper part of the arm Z terminates in a handle.
Z3 is a similarly-projecting arm near the other end of the shaft Z, in front cf the cylinder' or sleeve Y5.
Z4 is a crotch on the arm Z3, which embraces the flange Y.
Z5 is a plate on the front bearing of the shaft Z, in front of the arm Z', on the rear side of which are a series of holes in which a pin on the front side ofthe arm Ziits.' The shaft Z is capable of a slight endwise motion, to allow the pin on Z to be withdrawn from one hole on Z5 and inserted in another. A spring on the rear end of the shaft Z vholds it forward against the plate Z5.
C is a block called the bell-stop#7 which slides on asquare rod, C', parallel with the line of movement of the paper-carriage, and just in front of it. The rod C is supported in a bearing on the frame at its right-hand end, and at its other end in a. hanger below the extension of the top plate, and is capable of a slight rotatory movement therein.
C2 is a set-screw by means of which the block C may be fastened at any desired point on the rod C.
C3 is a guide on the back side of C, which vibrates in a plane at right angles to the rod C on a stud 0*.
G5 and G5 are pins projecting from the back side of the stop C, one above and the other below the guide C5.
NS is a pin projecting from the front of the lower part of the left-hand end of the papercarriage, which, as the paper-carriage moves in either direction, near the end of its motion passes between the pins C5 and C6 and engages with the guide G5.
CT is a eXible arm on the inner end of the rod C', which carries a metal weight, C5, capable of striking a bell, C". The bell CJ is attached to the side of the frame B.
B3 are friction-rolls on either side of the racks R and T, which guide'thc paper-carriage in its movement.
The operation of the devices mentioned is as follows: The paper-carriage N is supported on a single rail, D, on friction-wheels D:s in the interior of the platen P. X/Vheu writing is being done on the machine, Vit moves from right to left, as keys are successively depressed and released, being guided in a right line by the traveling wheels D5, running in the groove d. The platen P rotates on bushings P4 about the rail D as an axis. The paper to be written on, P', rests upon the paper-table G, and is drawn between the guide-strips Q3, the flexible bands p, and the under surface ofthe platen; thence it passes behind the guide-strips Q5 on the front of the machine, and between the pressure-roller P2, and the upper front surface ofthe platen. The types LT strike upon the inking-ribbon X, against the lower surface of the platen directly beneath the guide-rail D. The lower part of the paper-carriage N extends below the top plate ofthe machinein a vertical plane with the guide-rail D, so that the racksR and T, which are attached thereto, are also under l the line of suspension of the paper-carriage. In the same plane, also, is the spring-earn K and the carriage-strap K7. The tension of the spring in the cam K draws the paper-carriage toward the left of the machine whenever the dog O is vibrated. Bythe worm K5 and the gear K4 the tension of the spring in the cam X is increased or diminished, and the rapidity of movement of the paper-carriage is regulated. The guide-rail Dy being hinged at D may be turned up perpendicularly to the top plate, taking with it the paper-carriage, racks, and appurtenances, so that the top plate of the machine is cleared. The end Dzotl the guiderail rests in the slot in the arm A2, and is held therein by its own weight. After a line has been writtcn,the paper-carriage is at the limit of its movement on the guide-rail, and must be moved back by h-and for the commencement of the new line, and at the same time the platen lnust be rotated one or more teeth of the ratchet-wheel P5 in the direction ofthe arrow, Fig. 8, in order that the new line may be a proper space below the one last written. To accomplish this,the operator pulls the front arm of the carriage-lever E, and thereby de-v presses its rear arm,and causes the pawl E3 to engage with the ratchet-wheel P5. As the depression ofthe lever E continues, Athe ratchetv wheel P5, and consequently the platen, are rotated. The movement of the carriage-lever is terminated by the contact of the stop or linespace regulator Fwith the frame of the papercarriage. bearing,the operator easily pushes the carriage toward the right of the machine, the dog O turning on the pin OZ and slipping over the teeth of the rack T. As soon as the rotation of the ratchet-wheel P5ceases,the spring-pawl IOO IIO`
The leverE having come to a rigid EB-which slips over the teeth of the wheel P5 1 when it is rotated by the lever E-resists any reverse movem ent,so that the platen may not be moved by any slight jar or by the impact of the type, but may be moved in either direction by the application ot' sufficient force. Vhen the operator releases the carriage-lever E, the spring E7 causes it to return to its original position, and with it the pawl E5, which slips over the teeth of the wheel P5. Near the end lof the upward movement of the rear arm of the carriage-lever an angular projection, E", on the under side ofthe pawl li, strikes on a projection on the hanger N, and removes the pawl E3 from contact with the ratchet-wheel P5. A sprinO'. E5, presses-the pawl E3 toward the wheel P when it is out ot contact with-the hanger N5. lt will be seen that the length of the arc of vibration ofthe lever E. after the pawl E2 has engaged with the wheel P5, determines the amount of movement of the platen, and, consequently, the distance between two consecutivelinesofthewriting. This-arrangement of a carriage-lever and attachments secures the positive contact ot' the pawl E3 with the ratchet-wheel. Psoon alter the commencement ofthe motion of the carriage-lever, and holds the pawl E* away from the wheel P5 when thelever is in its normal positin, so that only the slight resistance ofthe spring E8 need be overcome to rotate the platen.
To vary the amplitude of the are of vibration of the carriage-lever, the line-space regulator F is provided. This regulator is turned upon the screwy F by the handle F1, for the distance of a quadrant, till its movement is checked by the Contact ot' the stud F3 with projections on the end of the lever E. This line space regulator is represented in Fig. 8 in its upward position when the lever E has a short arc of vibration, and the platen is turned a distance of one tooth of the ratchet-wheel P5. When the regulator is moved into its second position, thelever E is shortened and vibrates over a greater arc, and the platen is moved a distance of two teeth of the wheel P5. The two widths of line-spacing thus secured are found to be sufficient in practice. The spring F* rests upon the upper surfaces of the regulator F, and holds it in either one of the desired positions without the aid of any tightening-screw or similar device. In other machines a li nespace regulator has been attached to theshai't on which the platen 'rotates and also on the carriage-frame in front ofthe platen. In the former construction every alteration ot' the line-spacing is liable to disarrange the platen, and in both, to tighten the regulator in position,a thumb-screw is necessary. The improved device is adj usted by one movement, andis in a position easy of access. Thelever H, with its attachments, is used to rotate the platen in the direction of the arrow, Fig. 3, and to return it, if desired, to its original position. As the types strike on the under surface of the laten the writing is concealed from the view ofthe operator. It may be seen, it is true, by
turning up the guide-rail D; but this is an inconvenient method. The present improvement' allows the platen, with the paper, to be rotated, so as the line which is being written may be brought in full view of the operator, and then carried back to the exact place from which it was moved. When the lever H and the lower arm of the pawl J are pressed t0- -ward each other, the end J of the pawl J will be depressed,and will enter between two teeth At the same time of the ratchet-wheel PG. the latch J will be raised by the spring J and the step J5 will be brought in front of the lever H, so that the lever and pawl will be locked together. This position ot the lever H and pawl J is shown in Fig. 4. lf, now, the lower arm of the lever H is raised, it will turn about the guide-rail l), and will carry with it the ratchet-wheel P and the paper-platen. This movement can continue until the pin JS on the pawl J strikes the frame of the papercarriage. The pin J8 is placed in such a position that the platen is turned a little more than a quadrant, and` the paper is carried with it until the line which is being written is brought just above the scale Q. It desired, the platen may be left at this or at any intermediate point by depressing the latch J3, and thereby removing the pawl J from the ratchetwheel PG; butif it isdesired to continue writing in the same line, the lever is turned back until it rests upon the frame ofthe paper-carriage on the front side of the machine. This brings the paper into proper position for writing, and when the latch J3 is released the platen is free to be turned by hand or by the linespacing devices. The scales Q and A are provided to enable the operator at any moment to determine the progress ofthe writ` ing, or, in case an error is made, toenable the carriage to be set back for its correction. The scale Q is attached to the paper-carriage in 'front of the platen, below the position of the line which is being written when itis turned up IOO for view. ltisgraduated tromleftto right, the
unit ot` graduation being the distance `between two consecutive letters, or the distance between two teeth of the racks R and T. The scale A3, which is attached to the top plate of 'a machine, is correspondingly graduated,but from right to left. The pointer Q', in the center ot' the scale Q, indicates ou the scale A3 the progress ot' the writing. lf anerror is to be corrected, or an omission supplied in the line which is being written, the operator will turn the line into view by the platen-rotating lever H, when the line will bejust above the scale Q. By observing the number on that scale over which the fault exists, moving the papercarriage so that the pointer Q is over the same number on the scale A, and returning the line to its position beneath the platen, the proper character may be inserted. To correct an error in the body ot' the writing, the same process will be gone through with, except it will be first necessary to turn the platen by hand, so as to bring the line in which the correction is to be made into position over the scale Q. The combination ot' a scale on the top plate with a reverselyv grad uated scale on the papercarriage has been heretofore used, but the reversed scale has been placed under the platen and out ot' sight. My improvement consists in placing the two scales in j uxtaposition, that their relative position may be ascertained at a glance. The guides Q3, which are fastened to the paper-table G on the rear of the platen,
'in Fig. 13.
and extend beneath it and concentric to it nearly to the lowest point thereof, and the guides Q2 on the scale Q, which extend above the platen, supplement the elastic bands p and pressurerollers l?2 P3, and hold the paper iirmly against the surface of the platen. The front guides, Q?, are especially serviceable when the last line on a sheet is brought up for View above the scale Q, for without them, when the platen is turned back the lower edge of the paper would be li-able to stand otf from the platen and catch on the scale Q. The trippin NB on the front of the lower left-hand end of the paper-carriage, when a line is nearly completedftrips and vibrates the hammer CS and causes the bell Cito sound. Vhen a line is beingavrittenthat is, when the carriage is moving from right to left-*the trip-pin DS, near the end ofthe line,passes above the hinged trip C, and presses it against the pin G,as is shown As the movement of the papercarriage continues the trip-pin will depress the hinged trip C3 and partially turn the rockshaft C', thereby raising` the bell-hammer 0*. Vhen the highest point of the trip C3 is passed, the rock-shaft C resumes its position, and the hammer strikes the bell. The trip-stop C is ad justable upon the shaft C', so the bell may be made to ring at any desired pointnear the end of a line. The shaft Cisgraduated similarly to the scales Q and A3. If the left-hand end of the stop C be set upon a given number, the.
bell will ring when a character is impressed at the same number on the scale Q. Vhen the carriage is on its return movement-that is, from left to right-the trip-pin passes under the hinged trip C3 and raises it, but does not move the trip-stop C or sound the bell. This is shown in lig. 14, the arrow indicating the direction of motion ofthe paper-carriage. Thedepression of any one ofthe type-keys L2 raises the rear end of its lever L and also the connecting-rod Ltand the type-barLG, and causes a type, L7, to be impressed against the paper on the under surfaceof the platen. Vhenever any one of the type-keys or the space-key is depressed, the frame, made up of the barM, the armslly 2 and O on the shaft M3, and pivoted at M4, is vibrated, and the dog O, which, when the frame is in its normal position is engaged with the reciprocating rack T, is brought forward between two teeth of the rack Rf At this time, while the papercarriage is held stationary, ifa type-key be struck the type is impressed. Upon the release of the key the weight ofthe connectingrod and type-bar, together with the action of the springs M5 and M, return the type-key lever and the bar M to their original position, and the dog O is moved .out from between the teeth ofthe rackRinto Contact with the rack T, but in the meantime the spiral spring T4 has drawn the rack T the distance between two of its teeth in the direction ofthe movement of the paper-carriage, and the dog O will now enter the rack T one tooth farther to the left than before. The coil-spring in the cam K, acting through the strap K7 on the paper carriage, overcomes the comparatively feeble tension of the spring` T* and draws the carriage one tooth toward the left. In this way the paper-carriage is fed to produce letter-spacing. 'Vhen the carriage is moved reversely, the dog O turns on-the pin O2 and slips over the teeth of the rack T. When the space-key Sis struck, the carriage is moved one space and no character is impressed. The key-levers can only be depressed a distance sufficient to move the vibratory frame so that the dog O shall engage with the rack R and release the rack T. It is desirable at times to release the paper-carriage .entirely from the control of the dog O', so that it may move a numberof letter-spaces at once. For this purpose the keys M M on either end of the bar M are provided. If one of these be depressed, the vibratory frame is moved over a greater arc than by the action of the key-levers, and the dog O is brought in front of the rack R, and the carriage is free to be drawn by the spring-cam until the key M is released, 'when the dog re-engages with the racks.
The combination of a stationary and a reciprocating rack with a single dog` is not a part of my invention. My improvement in this respect consists in the employment of ahinged dog, a vibratory fraaie capable of being moved out of contact with the racks, and in the location of the combination relatively to the axle of the platen and the guide-rail on which the paper-carriage is supported. The pawl K8, attached tothe spring-cam K, turns theratchetwheel U3 and the beveled gears U and U2, and one ofthe gears NW Vzon the shafts W' and V, on which are the inking-ribbon spools Y X', whereby the inking-ribbon is moved whenever the spring-cam moves the paper-carriage. The shaft U is capable ofa slight longitudinal movement, and may be held in three positions, accordiug as the springlatch is in either of the grooves UL U5 U, Vhen the springlatch is .in the Oroove UG as shown in Fie. 3 the rear U is out of contact with the gear V", and the gear U meshes into the gear T2. The springcam then imparts motion to the ribbon-spool Y, and the ribbon X is wound upon the spool Y and unwound from the spool X. the latch is in the groove U, the gear U is thrown into contact with the gear Vi, andthe ribbon will be wound uponthe spool X and unwound from Y'. Vhen the latch is in the middle groove, U5, both the gears U Ul are thrown out. The pawl KS in its backward movement slips over the teeth of the ratchet` wheel U, so that the inkingribbon is not moved when the carriage is moved back after a line has been written. The rock-shaft Z, arms Z Z3, the projections from which, Z2 Zt, engage with the outer flanges of the sleeves X Y3 when moved by the handle Z, slide the inking-ribbon laterally,as desired. \Vhen'ever the ink is exhausted in one line-course, the slight endwise motion of the shaft Z, which enables the pin on the front side of the arm Z ICC to be removed and replaced in the holes in the plate Z6, enables aseries of defined line-courses to be obtained on the inking-ribbon. The arms Zpand Z3 are pointed in the same direction and movesimultaneously, so as to keep the ribbonspools always opposite one another.
The combination of a'long shaft placed in the rear of the machine, with a pulley carrying the mainspring 'in the rear ot' said shaft, or carrying the operating mechanism in the rear of the type-bars connecting-rods, is not a part of my invention; neither is it my invention, broadly, to carry acylinder upon a shaft with friction-wheelsinterposed. Myimprovement in this respect consists in the combination and arrangement of parts described and claimed, by which I prevent nearly all lateral motion of the carriage caused by the high speed at which writing-machines are run. I thus obt-ain whatI call a central draft,7 and the platen and paper run true and without lateral vibration, as I locate the carriagev driving power where it can beattached to the carriage at the center of resistance caused by said carriage and by the letter-spacing. By running the shaft to which the ratchetvwheel is attached through the hub of t-he spring-wheel Idispense with one shaft,the bearings for the same, and two bevel-wheels or equivalent devices for connecting the driving-power with ribbon-spools, and thus produce a simple and compact machine.
With a machine constructed as above described, the axis of the ribbon-shaft must be arranged parallel with the platen instead of at right angles,`as formerly, and the parts reconstructed to meet this need. By my construction and use of the paperguides described the paper cannot move or change its position on or against the platen when the latter is rotated to exhibit the writing, and this could not be obtained by the means heretofore in use.
1. In a type-writing machine, the combination ot' the top frame thereof, type-levers of unequal lengths pivoted thereto, to strike the under side of the platen, and a platen having its axle hinged to the top frame at one end, with a paper-carriage hung on said axle ofthe platen, whereby the platen is adapted to turn on its axle for line-spacing, and with the papercarriage, to move longitudinally thereon for letter-spacing, and be lifted, substantially as described.
2. In a type-writing machine, a line-space regulator, F, attached to the carriage-lever, and adapted to be rocked and held by a spring on said carriage-lever, substantially as described;
3. In atype-writing machine, an adjustable line-space regulator held in position by a spring, and secured to the end orn the lever, extending forward and down, substantially as described.
4t. A graduated scale attached' to the frame of a` typewriting machine, parallel to and nearly in contact with a reversely-graduated scale attached to the paper-earriage, substah- 7. In con'ibinationwith the fraaie and a graduated scale on a type-writing machine, to
indicate the progress ot' the writing, the pivotal axle of the bell-hammer, provided with a similarly-graduated scale, on. which a belltrip may be adj usted, and be seen from the front ofthe machine, and a papencarriage provided with a tri p-pin, substantially as and for the purpose described.
S. In typewriting machine, the combina-f tion of two parallel and straight racks attached to and extending the length of the paper-carriage, one of which is iixed, and the other capable of a slight longitudinal motion in a vertical plane passing through the axle of the platen, with a dog hinged so as to slip over the teeth of the rac-ks when the paper-carriage is reversed, and the lever to which it is pivjoted, extending under the key-levers, substantially as shown and described.
9. In a type-writing machine. the combination of the paper-carriage provided with pend ent arms at each end, with a rack attached to said arms, and situated in a vertical plane passing through the axis of the platen, the whole forming an open frame for the passage of type; bars, substantially as and for the purpose described.
10. In a type-writing machine, the combination of a series of type bars of unequal lengths, pivoted and arranged, as shown, in two rows, so as to cause type to be impressed at a common point, with a rack attached to arms adapted to pass between the rows of typebars, and moving with the paper-carriage in a plane passing through the common impression'point, and a grooved guide-rail passing through the platen, on which rail the papercarriage moves, substantially as shown and described.
11. In a type-writing machine, the eombination of a series of type-bars pivoted in two rows, as shown, toimpress type at a common point, a paper-carriage wit-h pendent arms adapted to pass between said rows, and a rack secured to said arms,with a spring-wheel and strap adapted to impart motion to the papercarriage, the arms, rack, and wheel being situated in a vertical plane with the axis of the platen, substantially as shown and described.
l2. In combination with a spring-wheel to move the paper-carriage of a type-writing machine, a pawl, K8, and ratchet-wheel U3, to turn IOO IIO
the inking-ribbon spools, the shaft to which the ratchet-wheel is attached being supported in a bearing running through the hub of the spring-wheel, substantially as shown and described.
13. In a type-Writing machine, inking-ribbon spools having their axes parallel with the axis of the platen, each having a anged sleeve connected with the hub, in combination with arms Zl Z3 and crotches Z2 Z*7 substantially as shown and described.
14. In a type-Writing machine, the combination of key-levers, each having its fulcrum on a com mon rod between its key and connecting-rod, with a vibratory frame adapted to vibrate, and two racks connected with carriageirame by pendent arms, and a single dog pivoted to a bell-crank lever having one of its arms extending under the space-bar, forming a spacing mechanism to permit an intermit tent movement 0i" the paper-carriage when actuated by a key-lever, and lto d-isengage the spacing mechanism from the paper-carriage GEORGE W. N. YosT.
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Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3739899A (en) * 1970-08-03 1973-06-19 Ibm Carriage indexing mechanism
US20060053561A1 (en) * 2004-09-13 2006-03-16 The Coleman Company, Inc. Airbed with built-in air pump

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3739899A (en) * 1970-08-03 1973-06-19 Ibm Carriage indexing mechanism
US20060053561A1 (en) * 2004-09-13 2006-03-16 The Coleman Company, Inc. Airbed with built-in air pump

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