US410490A - cahoon - Google Patents

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US410490A
US410490A US410490DA US410490A US 410490 A US410490 A US 410490A US 410490D A US410490D A US 410490DA US 410490 A US410490 A US 410490A
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arm
lever
platen
machine
pawl
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    • BPERFORMING OPERATIONS; TRANSPORTING
    • B41PRINTING; LINING MACHINES; TYPEWRITERS; STAMPS
    • B41JTYPEWRITERS; SELECTIVE PRINTING MECHANISMS, e.g. INK-JET PRINTERS, THERMAL PRINTERS, i.e. MECHANISMS PRINTING OTHERWISE THAN FROM A FORME; CORRECTION OF TYPOGRAPHICAL ERRORS
    • B41J1/00Typewriters or selective printing mechanisms characterised by the mounting, arrangement, or disposition of the types or dies
    • B41J1/22Typewriters or selective printing mechanisms characterised by the mounting, arrangement, or disposition of the types or dies with types or dies mounted on carriers rotatable for selection
    • B41J1/32Typewriters or selective printing mechanisms characterised by the mounting, arrangement, or disposition of the types or dies with types or dies mounted on carriers rotatable for selection the plane of the type or die face being parallel to the axis of rotation, e.g. with type on the periphery of cylindrical carriers

Description

2 Sheets-Sheet 1.
.(No Model.)
W. GAHOON. Jr. TYPE WRITING MACHINE.
Patented Sept. 3, 1889.
N. PETERS, Pholu-Lnnngmpnr, washmgwn. D. C.
2 Sheets-Sheet. 2.
(No Model.)
W. CAHOON. Jr. TYPE WRITING MACHINE.
Patented Sept. 3, 1889.
zus.
UNITED STATES PATENT OFFICE.
VILLIAM OAHOON, J R., OF Ll'llTLE ROCK, ARKANSAS, ASSIGNOR OF ONE-HALF TO E. L. LEFEVRE, OF SAME PLACE.
TYPE-WRITING MACHINE.
SPECIFICATION forming part of Letters Patent No. 410,490, dated September 3, 1889.
Application filed July 27, 1888. Serial No. 281,212. (No model.)
To all wil/07u, it may concern:
Be it known that l, VILLIAM CAHOON, J r., a citizen of the United States, residing at Little Rock, in the county of Pulaski, State of Arkansas, have invented certain new and useful Improvements in Type-Whiting Machines, of which the following is a specification, reference being had therein to the accompanying drawings.
This invention has relation to that class of type-writers in which a segmental type-disk is employed.
The objects and advantages of the invention will hereinafter appear, and the novel features will be particularly pointed out in the claims.
Referring to the drawings, Figure 1 is a plan of a typewriter constructed in accordance with my invention. Fig. 2 is a longitudinal vertical section on'the line a; of Fig'. 1. Fig. 3 is a front elevation of the feed-pawl mechanism in detail. Fig. 4 is a front elevation of the platen-releasing' mechanism in detail, the platen being removed. Fig. 5 is a sectional detail through the type-segment, its sleeve, and the spindle.
Like numerals of reference indicate like parts in all the figures of the drawings.
1 represents the base of the machine, which is supported at suitable points by lugs 2.
3 represents a type-disk standard, which is secured to the base and centrally bored, in which is loosely mounted a spindle 4., having transversely-projecting lugs or pins 5.
6 represents the type-disk segment, which is provided in this instance with two rows of printing-characters S and 9, which may be small letters or upper and lower case letters, as desired. Depending from a type-segment G is a sleeve 7, which is adapted for the reception of the upper end of the spindle 4, and is longitudinally slotted to straddle or receive the pins 5, and has formed thereon two opposite annular collars 10. A partition 11 is arranged transversely upon the base 1 in front of the standard 3, and projecting upwardly and outwardly therefrom is a spring-arm 12, having a pin 13 at its free end, which takes into a depression formed in the upper end of the spindle and serves as a bearing for said Spindle.
14 represents the paper-roll, which is journaled in standards 15 at each end of the opposite longitudinal ribs 1G, which together form the carriage of the machine, the car- 5 5 riage being mounted in ways 17, secured to the base and having one of its ribs provided with a feed-rack 18. A bail 19, journaled in the standards 15 of the carriage, is adapted to swing into contact with the roll 14 and se- 6o cure the paper thereon.
2O represents the key-levers, which are provided with indicating and operating keys at their front end and are fulcrumed upon a transverse rib 21, extending across the base 1 65 of the machine. A bridge 22 extends across the levers from side to side of the base, and a spring 23 is interposed between each lever and the bridge 22 in rear of its fulcrum and serves to depress the rear end of the lever 7o when not otherwise iniiuenced. Guide-pins 24 are arranged between the levers and, projecting upwardly from the base 1, serve to prevent lateral displacement of said levers.
Adjacent to the partition 11 and in front 75 thereof are arranged opposite standards 25. At the upper ends of each, and extending across the machine and the rear end of the case, are vertically-opposite horizontal plates 26, provided with opposite perforations 27, 8o in which are loosely mounted gravity stoppins 28-one for each lever-the lower end of each pin resting upon its companion lever. When the levers are in their normal positionthat is, with their rear ends depressed-the upper ends of these stop-pins are about flush with the upper plate 26, and when said 1evers are depressed the pin resting thereupon is raised, all for a purpose hereinafter described. 9o
Journaled in bearings 29 at each end of the partition 11 is a rock-shaft 30, which is provided with a forwardly-projecting bail 31, cxtending across the rear ends of the key-levers and resting thereupon, springs 32,connecting the bail with the partition, serving to maintain the same in a lower position and in contact with the levers.
Mounted upon the rock-shaft 30, and adapted to move therewith, is a rock-arm 33, the icc forward end of which may be extended and connected to the bail and the rear end of which is longitudinally slotted, as at 34, and passing through said slot is a curvedinclined arm 35, projecting from the spindle 4. The arm is curved and depressed toward its lower end, so that by depressing a key-lever, as shown in Fig. 2, its companion pin 28 will be raised and its rear end will raise the bail 3l, which in turn will depress the slotted rock-arm 33 and cause the same to turn the arm 35 by riding along its incline. The arm 35 being rigid with the post 4 and said post being in rotatable connection with the sleeve 7 by means of the pin 5, said sleeve will turn and carry with it the type-segment, thus presenting the character thereon agreeing with the key 20 to the printing-point. This printingpoint will be determined by'reason of an arm 36, projecting from the rear end of the type-` segment, coming in contact with the pin 28, which is raised out of its normal position and into the path of said arm. Vhen the key is released, the parts return to their normal position. The forward ends of the key-levers 20 are limited in their downward movement by the 'transverse stop 37, arranged across the base of the machine, and are also limited in their upward movement by means of a springbail 38, the ends of which are connected to the ends of the stop 37 at each side of the machine, and which embrace the upper edges of the key-levers.
Pivoted in bearings 39, depending from the under surface of the machine and preferably at one side thereof, is a lever 40, the key of which projects up through the base within convenient distance of the hand of the operator. This lever extends to the rear of the machine and under the base to a point about opposite the standard 3. A sleeve 42 (see dotted lines, Fig. l) projects upwardly from the surface of the machine and under the type-segment, and mounted for sliding in the same is a vertical rod 43, the upper end of which is L-shape'd and bifurcated and terminates between the annular collars l0, fixed.
to the sleeve 7. The opposite end of the rod 43 rests upon the rear end of the lever, so that by depressing the lever 40 at its front end, through the medium of the key 4l, the rod 43 is raised, and with it the type-segment 6, thus presenting to the printing-point the lower row of printing characters, which may be small letters or capitals, as desired. At opposite sides of the base are posts 44, projecting upwardly therefrom, and pivoted thereto are the opposite ends of a feedbail 45, which extends transversely across the machine under the front end of the key-levers 20 and in the path thereof, said bail being yieldingly supported in a raised position and in contact with the levers by a spring 46. Journaled in bearings 47 is a longitudinal rock-shaft 48, the front end of which is bent at an angle and terminates under and in the path of the bail 45, and the opposite end of which is also bent lat an. angle and carries the pivot-paw] 49, the front end of which works in the teeth of the rack-bar 18. A small spring 50 is interposed between the front end of the rockshaft 48 and the base, and serves to maintain the same in a raised position and against the bail 45. By this it will be seen that when a key-lever is depressed not only will the typesegmentf be operated to bring the desired character to the printing-point, but that the pivoted pawl, which is provided with a hooked working end, will, when the lever is liberated, draw the carriage one tooth to the left and ready for the next impression. This return movement of the pawl is caused by a flat spring 51, projecting under the pin 52X.
In this machine I employ a movable platen 52 in preference to a movable roller, said platen being of an L shape and provided with an impression end 53, and the lower end thereof being pivoted, as at 54, in standards 55, projecting upwardly from the base at its rear end and in line with the post 3. A spring 56, secured to the base projects upwardly therefrom, is curved, and terminates in a notch 57, formed in the rear end of the movable platen 52 and in rear of its pivot 54, and serves, when not otherwise influenced, to force said platen to a forward position, so that its impression end 53 is brought against any printing character that is in line therewith. Formed upon the rear edge of the platen 52 are vertically-opposite cams 58 and 59.
Pivoted in rear of the platen 52 is a locking-pawl 60, upon the front face of which is formed alocking-finger 6l, adapted to take over the lower tooth or cam 59 of the platen, and is also provided with curved recessed portions 62 63 at veach side of said finger 6l. The locking-pawl 60 is maintained ina locked position-that is, swung to the front-so that its finger 6l is over the tooth or cam 59, through the medium of a fiat spring 64, secured to the frame-work and having its free end terminating in one of a series of notches 65, formed in the rear face of the lockingpawl.
Pvoted in hangers 66, depending from the under surface of thebase of the machine, and about midway'thereof, is a releasing-lever 67, the forward end of which terminates about in a line with the bail 45, and from said bail there depends a pin 68, the lower end of which rests upon the lever 67, and the rear end of the 4lever 67 occurs about under the locking-pawl 60 and slightly at one side thereof. Pivoted to this lever 67, as at 68X, is a tripping piece or lever 69, having verticallyopposite transversely-projecting pins and 7l, said lever projecting up through the base of the machine and at one side of the lockingpawl. The upper pin 70 of the tripping-lever is longer than its companion, and when the platen 52 is in its normal position-that is, swung to the rear-said pin 70 rests directly under theupper tooth or cam 58 thereof and within the depression 62 of the locking-pawl 60. Now when a key-lever is depressed the lever 67 is also depressed at its front end, and
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its rear end consequently rises, the platen 52 being considered in a locked rearmost position. As the leverGTis raised at its rear end, the arm (39 is consequently raised and the pin forced upwardly and between the curved portion of the locking-pawl and the upper tooth 58 of the platen 52. This causes the locking-pawl to be swung to the rear, moving against the tension of its spring 64, and withdraws the finger Gl from contact with the lower tooth 59 of the platen. The spring 5G, when the platen is thus liberated, throws the same to the front, bringing its impression end 53 to the printing-point as the printing character on the type-segment is brought to that point, so that a sheet of paper occurring between the same receives an impression from the printing character. The finger of the operatorbeing removed from the key, the spring 46 raises t-he bail 45, and with it elevates the pin (3S. Then this pressure is removed, a spring 72 interposed between the end surface of the base, the lever 67, and near the rear end of the latter, serves to return said lever to its normal position. As the lever returns, the shorter arm 7l of the releasing-arm 69 engages with a rearwardly-projecting pin 7 3, projecting from t-he rear edge of the platen 52. This brings the platen to the rear, and the iin ger Gl of the locking-pawl 60 takes over the tooth 59, and the platen is thus locked for anotherimpression.
If it is desired to move the paper-carriage to the right for the purpose of correcting an error, to begin a new line, or for any purpose whatever, it is only necessary to depress the small lever 74, pivoted in brackets 75 at the side of the carriage. This lever is connected by a link 76 to the feed-pawl 49, and by its depression said pawl is raised from mesh with the rack-bar 18 of the carriage.
Mounted in standards 77 at each side of the printing-segment are inking-ribbon spools or drums 7 S, around each of which is wound one terminal of one end of an ink-ribbon '79. The drums are provided with annular grooves, and extending from one to the other of said drums, and thus connecting the same, is an endless belt or cord 80. The cord 8O is connected by an arm Sl to the movable carriage l5, so that as the carriage moves in either direction the endless belt is also moved, which in turn rotates the drums or spools and winds the ribbon from one drum to the other. After printing a line, the carriage being returned, and also rotated through the medium of the thumb-nut 82, the ribbon is wound upon the drum at the right of the machine, so that no special reversing mechanism for the ribbon is required.
An arm 83 may project from any portion of the machine, and in this instance from the partition ll rearwardly, and is bifurcated at its end, as at 84, to form a guide and support for the ribbon, so that the same is always held in contact with and in printing relation to the type-segment.
Projecting rearwardly from the pin G8 is a spacing-key rod 45, the operation of spacing' being the same as described with regard to p rin tin g.
Having. described my invention and its operation, what I claim isl. In a machine of the class described, the combination of a standard, mounted on the base and centrally bored, a spindle loosely mounted in the same, a type-segm ent provided With a sleeve mounted upon the spindle and adapted to rotate therewith, and a springarm having a pin bearing upon the top of said spindle, substantially as specified.
2. In a machine of the classy described, a type-segment mounted upon a spindle and a curved arm projecting from the spindle, in combination with a slotted arm, a rock-shaft connected with the curved arm, and a keylever for operating said rock-shaft, substantially as specified.
8. In a machine of the class described, a type-segment provided with a proj ecting arm and mounted upon a spindle having a projecting curved inclined arm, in combination with a rock-arm having a slot adapted to operate the curved arm, and a key-lever adapted to operate the rock-arm, and a stop to be projected in the path of the arm of the segment, substantially as specified.
4. In a machine of the class described, a pivoted platen provided with an impressionend, an impellingspring, and with cams, in combination with a spring-pressed pawl having a finger for locking over one of said cams, and a releasing-arm, and a key-lever for operating said arm, substantially as specified.
5. In a machine of the class described, a pivoted platen having a spring arranged in rear thereof and provided with cams, in combination with a locking-pawl having a finger adapted to take over one of said cams and provided with curved portions at each side of its finger, and a releasing-arm pivoted at one side of the locking-pawl and provided with a piu adapted to ride in the curved portion of the lockingpawl and release the same from the platen, substantially as specitied.
6. In a machine of the class described, a ypivoted platen provided with cams, a locking-pawl for the same, and a releasing-arm arranged at one side of the pawl, in combination with a releasing-arm lever and a bail for operating said lever provided with a key, substantially as specified.
7. In a machine of the class described, a pivoted spring-pressed platen provided with a pin and rearwardly projecting cams, a spring-pressed locking-pawl provided with curved faces, and an intermediate finger for taking over one of the cams, in combination with a releasing-arm having pins,
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one for liberating the platen from connection with the loeking-pawl and one for contact with the rearwardly-projecting pin of the platen,
platen 52, mounted in standards 55, notched, as at 57, having the spring 56, arms 73, and cams 5S and 50, in combination with the locking'- pawl 60,]1aving the spring G4, curved faces SO and 63, and finger 6l, and the releasing-arm 69,
having the pins 7() and 7l for operating the same, Substantially as specified.
In testimony whereof I affix my signature in presence of two Witnesses.
WILLIAM GAHOON, J R. VtneSSeS:
GEO. E. LEGART, H. P. JOHNSON.
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