US990312A - Type-writing machine. - Google Patents

Description

R. H. STROTEER.

TYPE WRITING MACHINE.

APPLICATION FILED JAN. 27, 1910.

Patented Apr. 25, 1911.

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R. H. STROTHER. TYPE WRITING MACHINE.

APPLICATION FILED mmzv, 1910.

990,312., Patented Apr. 25, 1911.

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' 1- 15 ATTEQRNEY R. H. STROTHER. TYPE WRITING MACHINE. APPLICATION FILED JAN. 27, 1910-.

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1-115 TTEJRNEY from the npper stripe of the ribbon; a snowing the mechanism to print irom trio ROBERT E. STROTHER, OF \MIOINTCLAIE NEW JERSEY, ASSIGNOR TO U N193 TYPE- VVRZTTER COMPANY, OF ILION, NEW YORK, A CORPORATION OF NEJV YQE'K.

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Specification of Letters Patent. Patented Apr, li filll Application filed January 27, 1910. Serial No. 540,426.

To all whom it may concern:

Be it known that 1, ROBERT H. S'rno'rrrnn, citizen ofthe United States, and resident of Montclain'in the county of Essex and State of New Jersey, have. invented certain new and useful Improvements in Type-Writing Machines, of which the following is a specification.

My invention relates to typewriting 'machines and. more particularly to the ribbon mechanism of such machines.

My invention has for its object to provide improved mechanism for vibrating the ribbon of a visible typewriter; to provide a changeable connection whereby the ribbon can be tin-own dilierentextents at each vibration, in order to print from either one of a. plurality of stripes of the ribbon; to provide means whereby the ribbon vibrator is not thrown. to printing position when it is desired to do mnncograph work, and other objects as will appear hereafter.

To the above ends, my invention consists in certain features of construction and combinations and arrangements of parts, all of which will be fully set forth herein and particularly pointed out in the claims.

In the accompanying drawings :-Figure 1' is a. side view, in vertical section, of a type writing machine having my invention embodied therein. Figs. 2, 3 and i are diagrammatic side views on an enlarged scale with parts in section and parts broken away; i 2 showing the mechanisnrset to print ribbon vibrator. It is here shown applied to a Monarch typewriter.

' he main frame or" that machine coinp [568 base 1, corner posts 2 and a top 1 plate 3, saidbase comprising, among other things, across bar 4 about midway of the length of the machine. A platen 5 is mounted on a carriage which is not shown, but which is drawn across the machine by a spring drum (3 in a manner well-known in the art. The ribbon 7 is carried by spools 8 mounted above the top plate and driven from the spring drum 6 by a train of gearinglO. The ribbon is threaded through a vibrator 11 having a depending stem 12 and guided on a fixed standard or guide 13. These parts may be of the. ordinary Monarch construction or of any other suitable construction A series of printing key let, having keys 15 on their forward ends, operate a series of. sub-levers 1% which are connected by links 17 with front-strike type,

bars 18 mounted on a segment 1. The sublevers 16 are pivoted to the key-levers and each of them cooperates with the fixed fulcrum rod 20. The segment 19 is shiftable up and down for upper and lower case printing. A universal bar 21, lying beneath the key levers, forms part of a frame which also comprises arms 22 which are rigidly mounted on a rockshaft 23, which is ionrnaled at its ends in brackets 24: depending from the transverse frame bar 4. Said universal bar is held. up in its normal position by a returning spring In addition to the end arms 2, the universal bar frame con c ses another arm 26 which projects some dis rnce standing link which operates f nientmechanism of the machine. ruff bon vibrating mechanism is also connec- V with this arm 26 and it comprises a bell crank pivoted to the side of arm at Said bell crank has a forwardly extenders arm and a downwardly extending 3 31, said forwardly extending arm being con nectcd bya link 32 with a lever 3303", the third order which is pivoted at 34: in a bracketlo depending" from the top plate of the machine. Said leverSS has in. its forward end an open slot that receives a cross pin 36 of the stem. 12'ofthe ribbon vibrator. hen any printing key is operated the pivot 28 of the bell crank 30, 31 moves downward and said bell crank swings to a certain ex tent on said pivot. l have provided means for controlling this swinging motion of the fi l RAH

bell crank. When itis desired to print from the lower stripe of the ribbon the bell crank is allowed to swing but little so that the for ward end of it moves down about as far the rear end or possibly farther. When it is desired to print from the upper stripe of the ribbon at greater extent of swinging motion is imparted to the bell crank so that the forward end of it doesnot move down so far, andwhen, it is desired to leave the vibrator stationary the bell crank is caused to swing about its pivot to such an extent that the forward end of said bell crank is sub stantially stationary.

A bracket 37, having the form shown in Figs. 1 and 6, is rigidly mounted on the underside of the cross bar 4- by means of screws 38 passing through an earO bent oil hori-- cont-ally from said bracket, which. bracket lies in part by-thc side of the arm 26 of the universal bar frame, and has an ear il bent oil therefrom which receives the upper end of the returning spring 25. The rear end of the bracket 37 has journalecl therein the left hand end of a transverse rockshaft4l2, the right hand end of which is pivoted in a bearing block 43 detachably secured to the right hand side plate of the base 1 of the machine. At. its right hand end said rock has rigidlv mounted thereon the hub 44. of an upright'arm tithe free end of which has pivoted thereto at d6 the rear end of a bar 47 which extends to the front of the machine, where it is formed with a linger iece 48 for moving said car in a front or ack direction. The forward end of the bar 47 is formed with an elongated slot 50 through which passes a shouldered and head ed screw 51 that is threaded into a plate .52 whichis detachably secured to the side bar of the machine by means of screws 53. The upper art of this plate is marked with lines 54 to indicate the dilterent settings of the bar, said lines cooperating'with apointer 55 said shaft 42 carries an arm 61 to the forward end of which at 62 there is pivoted a' formed on the bar 47. There are three of the designations 54: marked" Mimeo. Black and Bed. In order to maintain the bar in either of its positions corresponding to these designations, a plate spring 56 is secured to the side of the bar t? by a screw 57, and this spring carries a pointed pm 58 which passes througha hole in the bar l7 and is adapted to enter any one of three coni-' cal depressions :59 in the plate 52. It will, of course, be understood that'when the finger. piece 48 is moved in either direction it rocks the shaft 42. At its left hand end,

link 63 the free end of which is pivoted at 64, Fig. 6, to the depending bell crank arm 31. The link 63 is a guide link or controlling link for controllin the operation of the bell crank 30,v 31. When the parts are 1n normal position the pivot screw 64 and the same center. so that the lower end of the link practically no motion at all in an up ""MimeoW, the pivot 62 stands directly 0pposits, or substantially so, to the lower end of the link-32 where said link is pivoted to the lever arm 80, this being the position of the parts shown in Fig. 4. When the universal bar is depressedby the operation of a printing key, the parts move to the respective positions indicated by the heavy broken lines 30, 31 and 63 in Fig. l. Thelink 68 is compelled to turn about the pivot 62 as a center, and in doing so it compels the bell crank 39, 31 to turn approximately about the 32 remains nearly stationary and the vibrator stands substantially stationary. The lower end of the link 32 has a ver' slight motion in a, front and back direction, but

and down direction. The result is that the 'ribbon vibrator is not operated.

When the pointer'55 idnioved opposite; the line 54 marked Black, as shown m Fig. 6,, the parts assume the position shown in Figs. l and-2 in which the pivot 62 is somewhat be low the lower-end of the link 32 and in which the link 63 has an inclination forward and somewhat upward. If new a printing key be operated the universal bar will be depressed, moving the pivot 28 to the point 'marked 28 and the other parts will assume the positionsindicated b the heavy broken I lines in the figure. f'lh'e ink 63 will pull the arm 31' forward to the position marked 31" and the other parts will assumerespe'ctively the positionsma-rked' 30", 63", 32 and 33". The lower end ofthe link 32 will move down-' ward but not to the same extent as the pivot 28 so that the. vibrator is operated just .110 enough to bring the upper stripe of the ribbon to the printing point. i"

When the'pointer 55 is moved forward to the-position marked Red, the parts assame the positions showh in Fig. 3, where 1-16 the link 63 is lower than it is shown in Fig. 2; \Vhen a printing key is operated the parts assume the respective positions marked 63, 31, 30, 32 and 33. The forward end of the lever arm 30 moves downward fully as far as the pivot 28, with the result that the vibrator is thrown to a higher point th an in Fig.2 so as to print from the lower stripe of the ribbon.

The link 63 may be called a guide link or controlling link for controlling the operation of the floating lever 30, 31. The pivot screw 62 may be called ananchor or anchorage for said guide link and the arm 61 a support for said anchorage. It will be seen that th s of said support coincides with the normal position of the pivot 64 at the free end of the link 63; that means are provided for moving this support about its pivot to move-the anchorage 62 to a series of positions for varying the throw of the vibrator, and that in one of these positions said anchorage is aproximately -co-axial with the free end of the ever arm 30, in which last position the ribbon vibrator is not operated,

Various changes can ating said vibrator, said operating means ineluding a floating lever and means for operating said vfloating lever; a guide for one arm of said floating lever, and means for moving said guide to change the motion of said lever arm and thereby to change the operation of said lever on said vibrator.

2. In a typewriting machine, the combina-' tion of a ribbonvibrator, means for operating said vibrator, said operating means including a floating lever and means for operating said lever; a guide link for one of the arms of said lever, and means for anchorage of said guide link in order to change the operation of said lever on said vibrator. i

3. In a typewriting machine, the combination of a ribbon vibrator, a floating bell crank having one. arm thereof operatively connected with said vibrator, a guide for the other arm of said bell crank, means for moving said guide to change the direction of m0- tion of said other arm, and means for operating the bell crank.

4. In a typewriting machine, the combination of a ribbon vibrator, a floating bell crank, a device operatively connected With said vibrator and pivoted to one of the arms arm of said bell crank, and means for changof said bell crank, a guide link for the other ing the point of anchorage of said guide link to vary the operation of said bell crank on said device, said means including means for locating said anchorage substantially coaxialwith the point at which the device is pivoted to said and whereby said bell crank is rendered ineffective to operate said vibrator.

5. In a typewriting machine, the combination of a ribbon vibrator, a floating lever, a

device operatively connected to said vibrator and pivoted to one arm of said floating lever, means for a guide for another arm of said lever, and means for moving said guide, said moving means including means for setting said guide so as to cause said floating iever when be made in the details of construction and arrangement without changing the said vibrator.

operating said floating lever,

operated to turn substantialiy about the point at which said device is pivoted to said lever,-whereby said lever is rendered ineffective to operate said vibrator.

6. In a typewriting machine, the combina tion of a ribbon vibrator, a device operatively connected with said ribbon vibrator, a part pivoted to said device, means for operating said part, a guide link for changing the point of anchorage of said guide link, said means including means for locating said point ofanchorag e substantially co-axial with the point at which said device is pivoted to said part, whereby said part is rendered inefl'ect-ive to operate said vibrator.

7 In a typewriting machine, the combination of a ribbon vibrator, printing key levers, a uniyersal bar, a lever arm connected with said universal bar, a floating lever mounted on said lever arm, a device opera tively connected with said ribbon vibrator and pivoted to an arm of said floating lever, a guide or controller for said floating lever, and means for moving said guide or con troller to vary'the action or" said floating lever on said vibrator.

8. In a typewriting machine, the combination of a ribbon vibrator, a universal. bar, an arm connected with said universal bar, a floating lever mounted on said arm, a device operatlvely connected with said vibrator and ivoted to said floating lever, a guide link or said floatin lever, and means for changingthe point 0 anchorage of said guide link to vary the action of said floating lever on said device.

'9. In a typewriting machine, the combination of a ribbon vibrator, a universal bar, an

arm connected with said universal bar, a.

floating lever mounted on said arm, a device operatively connected with said vibrator and pivoted to said floating lever, a .ide link for said floatin ing the point 0 anchorage of said guide link to vary the action of said floating lever on said guide, link, said changing means includin means for locating said anchorage sub stantially co-axial with the point at which the device is pivoted tosaid lever arm to render said floating lever ineffective to operate ,10. In a 'typewriting machine, the combination of a ribbon vibrator, a floating lever, a device operatively connected with said vibrator and pivoted to an arm of said floating controlling the motion of said part, and means for lever, and means or changlever, a guide link pivoted to another arm of said lever, an anchor for said guide link, a pivoted support for said anchor having its pivotal axis coincident with the sition of the point at which said guide link is pivoted to said floating lever, and means for adjusting said support about its pivot.

11. In a typewriting machine, the combinormal po- & 990,312

of New York, in the county ofNew York and State of New York, this 26th day of January, A. D. 1910.

1 ROBERT H. STRQTHER. Witnesses:

E. M. WELLS, M. F. H NNWEBER.

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