US925373A - Type-writing machine. - Google Patents

Description

J. 0. MOLAUGHLIN.

TYPE WRITING MAGHINE.

Patented June 15, 1909.

APPLICATION FILED JULY 15.

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JOHN o. MCLAUGHLIN, OF JERSEY WRITER COMPANY, OF NEW YORK, N.

CITY, NEW- JERSEY, ASSIGNOR TO UNDERWOOD TYPE- Y., A CORPORATION OF NEW JERSEY.

TYPE-WRITING MACHINE.

@ Specification of Letters Patent.

Patented June 16, 1909.

Application filed July 15, 1908. Serial N 0. 443,577.

To' all whom it may concern: 4

Be it known that I, JOHN C. MoLAUoHLIN,

a citizen of the United States, residing in Jersey City, in the. county of Hudson and State of New Jersey, have invented'certain new anduseful Improvementsin Type-Writing Machines, specification.

This invention-relates to ribbon-wind machines,

1 g mechanisms of typewritin and particularly to those in whic 1 the ribbon is wound by means of the same spring which Q drives the lettersfeeding-carriage, and in WhiOh the ribbon mechanism is disconnected" from the carriage automatically. whenever the latter is released tobe run forward rapidly by its spring, 'so asto avoid rapid feeding I liability of-injur to the of the ribbon and ribbon, or derangement of the vwin ing and automatic reversin devices.

produce a simple and effective means" for releasably connecting the ribbon-winding and reversing devices to the carria e, to be re-.

leased automatically, as aforesaid.

One of the leading features of my invention'consists in taking advantage of the rotary movement of the-usualcarriage escapement mechanism for imparting, a rotary movement to the ribbon-winding mechanism, whereby sim licity of structure and op-. eration is secured: particularly because one movement of the carriage-release key (or of the usual tabulating key) releases the carriage from both the esc'a'pement and the ribbon-winding mechanism, such movement from the pinion. In other. wor the simple expedient of connectingthemaster ribbonwinding shaft to the .escapement pinion se-' cures not only the benefit of. driving the ribbon from the carriage propelling spring, but also the advantageof avoiding. the necessity of providing a special releasing mechanism'to disconnect the ribbon-winding shaft from the carriage-driving-spool, since the carriagesreleasing devices. are caused .toIdo. double dut by simultaneously releasing the ribbon-win ing devices.

usually consisting in the lifting of the rack of which the-following is a Other features and after appear. t I

In the accompanying drawings, Figure 1 is a sectional elevation from front to rear of an Underwood front strike writing machine, rovided with my improvements, the parts eing shown in normal positions. Fig. 2 is a sectional elevation from front to rear of the master ribbon-winding shaft, a worm-wheel thereon, andclutchin devices between the worm wheel and the s aft. .Fig. 3 isa rear elevation of the machine. Fig. 4 is a plan of a part of the. train of the ribbon spool'sfthe master-shaft being shown-midway between its extreme shifts. Fig. 5 is. a detail of the means to release-the paper carriage by means of the usual tabulator key. Fig. 6 is a perspective view of the usual rack bar, pinion and escapement wheel,

advantages will hereinj with the addition of the initial drive gear or I The principal ob ect of the invention is to pinion of'theimproved ribbon mechanism.

Keys 1 cadse type bars 2 to strike through a ribbon 3 against the front side of a platen 4, which is mounted upon a carriage 5... The carriage is guided upon rails, one of which is seen at 6, and is propelled by means of a strap 8. Upon the carriage isumounted. a rack 9, which meshes with; a pinion 10, the latter connected to an cscapement wheel 11, controlled by dogs 12 which vibrate. at the type strokes, said dogs being connected to-a universal bar frame. 1 3,Which is directly-reciprocated by the type bars. The. rack bar 9 is hinged uponthe carriage at 13? by means of a pair of arms 14, one of which'is pro- 'longed at'15 and carries a key 16, depression of which lifts the rack!) from the pinion. 10 to release the carria e from the control of the escapement mechanlsm. the parts are in common use in said machine.

1 To wind the-ribbon 3, I fix to-the spindle 47 forwardly of the pinion 10a bevel pinion 17, which meshes with a bevel inion 18 mounted u on thetop of a-ve'rtica ;shaft119. Upon t e bottom. of the latter is mounted another bevel pinion 20, to mesh with a. similar pinion 21. on the rear end of a shaft 22,, the latter carrying at its forwardend: a worm 23, fro

spring barrel 7 connected to the carriage bya As so fardescribed sea i that d res.

. Said master driving shaft mesh with a worm wheel 24 upon the transverse master driving shaft 25.

usual function of dr vinga pan of vertical shafts 26,27, carrylng spools 28,29, on

which the ribbon 3 is wound. The master shaft 25 is shiftable endwise to connect and disconnect the bevel pinions 31 and 32 thereon from-bevel pinions 33 and 34 mounted on the s 001 shafts 26,27. wheel 24 shi ts with the shaft 25, this movement being accommodated by swiveling the shaft '22 in a bracketor arm 35,which can turn about the shaft 19; both the'shaft and the swiveledarm 35 being supported upon a I step 36 provided upon the framework. The

forward end of the shaft 22 is hung by an arm or arms 37 upon the shaft 25 to shift therewith. a

The master sh .usual crankor handle 38 to wind theribbon manually as desired; and to permit such winding there is provided a clutch-device of common; type between pressed pawl 39 upon the'worm wheel and a ratchet wheel '40 fixed upon the" master shaft, whereby the latter may berotated either by or inde endently ofthe worm wheel.

It wi 1 be seen from the foregoing that the ribbon spools winding spring tates the pinion 10, which in turn operates the initial driving pinion 17 of the ribbonthe tabulator a tabulating mechanism including a key 41,

a column stop rack 42 connected by a link 41 to said'key and carrying a column stop 43 to cooperate with .a column-stop 44 on the carriage. A lever 45is also operated by key and carries a roll 46 to liftthe rack 9 from the pinion 1O whenever ,the tabulator key is operated.

In order to avoid movement of the ribbonwinding devices when the carriage is pushed back to the beginning of a new line, without lifting the rack 9 from the pinion, it is preferable to mount the pinion 10 loosely on a t spindle 47 to which e initial ribbon-winding pinion 17 is fixed, and to provide a pawl 48 and ratchet between the escapement pinion 10 and the spindle 47. This permits the pinion .10 to turn idly in mesh with the mounted loosely V performs the. chine, the pinion 10 is The worm ft 25 is provided with the the'worm wheel 24 and said master shaft, consisting of a spring-' are "wound by the carriage 7, since the carriage rack ro-- rack 9 As usual in the Underwood typewriting mamade in one piece. Or in other words, so'that the rear porwith the ratchet wheel. the pinion is thickened,

'tionzthereof may serve-ass ratchet wheel to be engaged by the pawl 48.

Variationsmay be resorted to within the scope of the invention, and portions of the im rovements may be' used without others. aving thus described my invention, I claim:

during the m m-a. the mags;

1. In a machine, the combination with a power-driven carriage having a rack, of an escapement mechanism including a inion meshing with said rack, and having a orizontal spindle, a vertical shaft geared at its upper end to said spindle, a shaft geared to the lower end of said vertical shaft and extending forwardly and carrying a worm, a transversemaster shaft having a worm wheel in mesh with said worm, and spool shafts operable in alternation by said master shaft; said master shaft being provided with a crank or finger-piece and said worm wheel being connected to said mastershaft by means of a clutch mechanism.

tion with a-power-driven carriage having a v rack, of an escapement mechanism in hiding a inion meshing with said rack, and avin a orizontal-spindle, a vertical shaft geared at its upper end tosaid spindle, a shaft geared to the lower end. of sa1d vertical shaft and extending forwardly and c trryinga worm, a transverse master shaft having a worm wheel in mesh with said worm, and spool shafts operable in alternation by said master shaft; the master shaft being shiftable endwise together with said worm and wormwheel.

3. In a typewriting machine, the combination with a pair of spool-shafts, of a master shaft to operate the spool shafts in'alternation, said master-shaft provided with a crank or finger-piece, a worm wheel connected to said master-shaft by means of a clutch mechanism, a worm engaging said worm wheel, an escapement mechanism'including a pinion connected to saidworm to operate the same, and a power-driven carriage having a rack engaging said worm.

4. In a typewriting machine, the combination with a pair of spool-shafts, of a mastershaft to operate the spool-shafts in alternation, said master-shaft provided with a crank or finger-piece, a worm wheel connected to said master-shaft by'means of a clutch mccha nism, a worm engaging said worm wheel, an escapement mechanism including a pinion connected to said worm to operate the same, and a power-driven carriage having a rack engaging said worm; said master-sh aft being shiftablo endwise together with said worm and spool shafts; the master-shaft being 10 and Worm Wheel to connect and disconnect shiftableendwise to connect to either spoolfrom the spool shafts. shaft, and said Worm shaft being swiveled to In a typewriting machine, the comhinaaccommodate the shifting movements of the 5 tion with a power-driven carriage having a I master-shaft. rack, of an escapo ment mechanism including J C. MCLAUGHLIN.' at pinion meshingwvith said rack, a Worm \Vitnesses: shaft operated by said pinion, a master-shaft K. FRANKFORT, having a worm Wheel in mesh with said Worm JOHN O. SEIEERT.

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