US1748896A - Margin-adjusting device for writing machines - Google Patents

Description

C..--OLIVETTI Fgb. 25, 1930;

MARGIN ADJUSTING DEVICE FOR WRITING MAOHI'NFLS ",Fifd may 31. 1927 2 Sheets-Sheet 1 awe/141201;

CAMILLO ouvsrr/ Gum/"Mg 2 Sheets-$111 261.- 7 2 zjwuantop CAM/L40 04/1/5771 Feb. 25,- 1 930. c. QLIVETTI MARGIN ADJUSTINGDEVICE; FOR WRITING MACHINES Filed May 31, 1927 I v, necessitating turning vthe paper over so as" g 35 cable to any kind of carriage.

I of balls or rollers. Onthe'ends of the-car Patented Feb. :25, 1930 I 1 I amino otr-vnr rr, n01? IVE/EA, Liar-AH:

:mmm mme DEVICE eon WRITING mums Application men ma 3 1", 1927; semi Nd.

, a Writing machines with tea 'fime er; carriage have the drawback ;.'that.i'the margin-adjusting device is mounted "behind :the carr iage in an inconvenient;position; and

to see how to adjustthedevicje, I v v The present invention consists in a combinationwhich enables the margin adjusting device to be set and fixed by displacingithe '10 carriage as a whole, while a 'control' ever is operated. V V r Two embodiments of the subject of the V invention are illustrated byway of example in theaccompanying drawings. Figure 1 represents {a section. throughzthe carriage, Figure 2 is adiagraln of the'iwh'o'le device. Figures 3l and 4 are longitudinal views of the guide on which the margin attachment is mounted, Fig 'lres '5 and 6-813 an elevation and section respectively ofa margin-adjusting device in 'positionTready for shifting. Figures 7 and :8 are an eleva .tion andvsection respectively of a modifies tion of'the margin-adjusting device embddye. ing theinvention. p

In the carriage represented in Figure 1 the margin devices aremountedinaligmi ment with the plate supporting the papen but they may be arranged in any other p0 sition and even behind the carriage, without altering the character of the invention.

, The carriage, the essential portions of which are shown in section, is of the ballbearing type, but the invention isga'pplin he bodiment shown, two guides (1)1and (2'), are integral withthe frame ofthe machine, and the member (3) of the carriageisadapt ed to slide between them by means of awset riage are arrangedthetwo cheeks1-(4) (see I Figures land 3) carrying th'efjournals'of the platen (5) and the plate (6)011 which the paper rests. Inorder to make the draw-. J

ing clearer, allthe details of the carriage not pertaining to the present invention have beenomitted. r Attached to the cheeksof the oarriageand lying parallel with the platen is} agradu'ated bar (7), on which the margin devices slide."

i the lever. Springs (36) the pivots inft-hedirection indicated by the beidesoribed later.

' .-varioi1s parts,jbeing intended to be viewed situated onthe 'right: and vice versa. .Hence merger the tyma'sc'ript. The pivots (16) supporting; the'jbar', *("1 5)eare in such a position that when the bai is: rotated thereon through 495,541,3116 ou na anuaI 12,1927.

" These [devices are two in number,- one on the right and one on the left (see :Fi ures 3 and 4 consisting of two metal bloc s (8 and .(8' 1) -.pro'vided with v a recess throng "which-the: bar (7 c'anslide. In the-figure "therecess is rectangular in shape.

v To' facilitate comprehension. of the drawings',- -the correspondingfparts of both m'argin {devices 1 are indicated by the same reference numerals, those of the left-hand de vvice being distinguished by a prime.

The blocks (8 (8");are provided, on the side opposite the plate'n, with't-wo projections,- of which that marked (-9') (9') is solid, whilst the-o other, (10) 10' is pro-v 55 i vided with 'r'nilled slots of a width corresponding to the space between two characters of the'ty'p'escrip't. -.The blocks carry -pivots (11)-(11 Ifor levers (12)"(12'), ternii 13"), and at the other end in lugs 14)'(14)projecting beyond the plane of v i 36.) act on-thelevers. (12)*(12 )-.and tendto turn them on 76 arrows in Figures 2, 3. and-5; so that the latches (13) (13') are held towardsthe position occupied by thebloo'k (20) which will It should be n'oted that in Figure 3, the

[from below aridbehind, are inverted so that the parts which are'onthe left when the machine is: viewed inthe; ordinaryway are the mar device 8 really the right hand one,-;an :v ce'ver's'a. r

Parallel with fthe' bar (7) {is another bar extending1a1ong'thecarriage and made to' rock'on'twdpivots (16)-'(1 6) (Figure 3)=gon the cheeks (4)of the carriage itself.

Oneside'of thebar 15-is, provided vwith teeth (17) formingaazkindof-rack having, a.

pitehxequal t6 the space between two c'haraca certain angle; the teeth (1 enter the gaps between theteeth" 10) :efjtherrjnargin device, thus securing the latter-fin its position, for

nating at one end in' latches (13) the time being. It should be noted that in lation to the remainder of the carriage, strikes Figure 1 the rack (17 is shown in engagement with the teeth (10) whilst in Figures 2 and 3 the two sets of teeth are disengaged and in the freed position.

The bar 15 is subjected to the action of a spring (37) which tendsto keep the teeth (10) and (17) engaged and at the end'of said bar is a lever (18) (Figure 1) for tilting the bar.

When the rack (17) is set to engage the teeth (10) and lock the margin device, the outward portion of said rack (17) presses on the oblique lug (14) of the lever 12) (Figures 2 and 6) and causes it to swing, 1

overcoming the action of the spring in the opposite direction to that of the arrowfso that the latch 13 withdraws accordingly. Mountedparallel with the carriage guides and the roller is a bar 19, provided about midway, which corresponds to the center-lineof themachine, with a small block 20.

The bar 19 is provided at the two ends with journals 21, mounted in two bearings or brackets ,(22) (Figure 3) attached to the frame of the machine, and enabling the bar 19 to slide longitudinally for a short distance which is limited by two set screws 23-24 fitted into the frame of the machine. A spring 25 keeps the bar ordinarily in contact with the screw 23. The block 20 is therefore capable of two movements, one of rotation on the axis of the bar 19 on which it is mounted, and the other one of displacement parallel thereto. It should be noted that thislatter movement is very slight and is less than the space between two characters 'of the typescript. r M

lVhen the machine is writing, the rack (17 is in engagement with the toothed blocks (10)-(l0) of the margin devices, which are therefore locked on the bar (7), and the terminal latches (l3)- 13) of the levers (12)-(12') are retracte and depressed by the action of the upper part of the rack (17) on the oblique lugs (IQ-(14') respectively of said levers; The levers (12)..(12) are then'in such a position thatthey cannot touch the small block 20 at any point.

The running of the carriage is restricted-by the fact that the block (8') of the left'margin device (seen on the right in Figure 3) which, as will be evident, remains fixed in reagainst the block (20) by means of its projection (9').

WVhen the carriage, which as in all writingmachines is impelled from right to left by a powerful spring, reaches the point where 9 strikes against ,the block 20, the action of the spring 25 is overcomeand the bar 19 is pushed ,until the end of the journal 21 strikesagainst the screw 24 which stops the displacement of the bar and at the same time brings the carriage to a standstill. I

suitable mechanism, which need not be de.-'

scribed, since it forms no part of the present invention, stops the movement of the eys of the machine, so that when the carriage reaches a point fixed by the position of the margin device (9), not only is the carriage itself stopped, but also the movement of the keys and the impresison of any further letters.

If, however, the bar (19) be now swung on its journals by means of the corresponding lever through such an angle that the block (20) clears the margin deviceand no longer touches the block (9) the bar(19) will return to its normal position, under the influence of the spring 25, so that the end of the right hand journal (21) comes in contactwith the fixed screw 23. When this is accomplished the movement of the mechanism blocking the key action is'reversed, andthe machine can continue to be worked and the typist can finish the interrupted word and begin a new When the end of the line is reached, the carriage is moved to the right by hand. To enable this return movement to'be accom plished without the small block (9) striking against the block (20), all that is needed is to shape the said small block (Figures 3 and 5) so that it presentsan obliquesurface in'such a way that during the return movement this slides on the block 20 and thereby causes the journals of the bar 19 to. pivot sufliciently to provide a clearance.

The carnage contmues to move towards the right until the block 20 strikes against the line the carriage may also be moved beyond the margin device on the right in the same manner and by the same means as described in connection with the device on the left hand. l

The method of shifting and locking the margin-adjusting device will now be described.

For this operation, the bar (15) is swung through a certain angle by acting on the lever (18), so that the rack (17 is disengaged from the toothed blocks (10)(10') of the two margin devices. This movement frees the oblique lugs 14-44 ofthe levers 1212 from the pressure of the rack 17 and enables the levers to pivot in the direction of the arrow under the action of their springs, so

that the latches (13)(13') move towards the block 20 (position shown in Figure 3)-.

" "It is desirable that this hand-operated should movement which turns the bar (152 h rom t e (if necessary) clear the carriage escapement ment of the carriage forward or backward inclined surface presented, as can be seen latch 13, the latter swings on the right can be dealt with from the drawings, by the end ofthe lever (12) on the side of the latch (13) causes the lever to turn on the pivot (11), and is thus able to pass over the latch'itself and come into contact with the block 9.

As soon as the block 20 back and thus engages the block 20 between the latch and the block 9, the space between them being sufficient to accommodate the block 20 with a little free play. Since the block 2O, as has been seen, is able to slide longitudinally only for a very short distance together with the bar 19 to which it is attached, the margin device will beheld by the block 20. during any movement of the carriage towards the right or left, and therefore fixed in relation to the carriage and the graduated bar (7) integral.

therewith, and on which the margin device (8) can then. be, moved into the desired position. To look the left margin device when this position has been reached all that is needed is to allow the bar (15) the rack (17) engages with, he teeth (10) thereby locking the margin on the graduated guide and at the same time releasing the lock 20' from the action of the latch (13) which as has been seen, 1s depressed by the same movement.

The movement of the carriage willthus be limited, to the desired extent, by means of the left-hand margin device,but will be unrestricted towards the right.

manner in order to set and lock it in the desired position.

The entire combination described afiords a means of carrying into effect the method devised forenabling the margin devices to be freed at will, displacing them'in relation to the carriage and locking them in the desired position. This combination enables the limits fixed by the margin-adjusting devices to be passed when necessary e1ther at ginning or end of a line. Y

The said method may also be carried out by other means, such, for example, as represents ed in Figures 7 and 8, in which for sim licity only one such device is shown. In th1s case the graduated bar 27 on which the margin devices slide is provided with teeth on both sides of the face and the margin device (8) is-locked therewith by the small pawl (28) wheel, without which the movehas passed over the 8 remains locked on the guide. Assuming to swing until The device 1n the same j vide the mar 11 the begl pivoting at the point 29 on the margin device itself and pushed upwards by the action of a sprin so that its teeth (30) enga e in-those teethiofthe'rack 31. The block %8) of the margin device is provided'withi'teeth' (33).

"Parallel with the graduated bar is another rack '34 adapted to swing 'on its shaft 35, of the same ofbeingturned up or'dow n, as indicated by the'arrow, by means of'a control lever attached to one of'its ends.

- The rack 34 is'mounted 35, but not to slide longitudinally. By turning the rack 34 downward on the shaft 35, it

willengage the teeth 33 of the block 8 of the rack 34'acts' on the end of the pawl 28 which it depresses and releases the'tooth 30 from the rack. I I

The carriage can then slide whilst the block and abletotake up the dethe guide 27. As soon as sired position onthe rack 34 has returned into the position shown in the drawing, the pawl 28'turns up- 'wards,*the tooth 30 reengages in the rack 31,

and the margindevice is locked in position bethe one situated on the right hand, that on the left hand willbe of similar, but reversed,

construction.

This arrangement will produce the same rewhilst at the same time the the described margin device to lengthas the carriage and capable in the frame of the I machine and not on the carriage, and its supports enable it to, swing round the shaftsults as the former, although of different ,con

, struction.

The essential and distinguishing feature of this invention is that by means of a longitudinal bar parallel with the path of the carriage, the margin-adjusting devices may at will be locked on the carriage or left free to slide on theirg'uid Moreover, whilst free to slide on the carriage they may remain fixed inrelat1on to the frame of the machine,so that by moving the carriage'they may be shifted into thefldesired positionsubstantially as described."

1n the first embodiment of the mar in-devices described, that is, according to igures 1. to 6, they may serveas tabulator stops,'so

' as to stop the machine in successive fixed positions. In such a case it will suflice to proaduatedbar (7 with a right-hand rately, beginning with the last oneonthe left. The friction between the block of the margin evice (8), determining the beginand a plurality of margin" devices (8) on the left hand. The setting in device and the bar on which it slides, and

which if necessary may be increased by means of a pressure spring, will be sufiicient to prevent the margin devices already in position from shifting when they are disengaged from the rack (17) for the purpose of setting the others. i

It should be noted that the described ncchanical arrangements may be 1nverted,.and that the block (20) may be supported by the carriage, whilst the guide (7) carrying the margin devices and the rack (17 may be mounted on-the frame of the machine, without departing from thescope of the invention, since the relative movement of the va-i rious parts remains unaffected. In fact the carriage by moving it, shifts the margin devices into the desired positions by the action of the block 20. v a

The said inversion may also be effected in the embodiment shown in Figures 7 and 8, in which the block (20) and the rack (34:) will be supported by the carriage, whilst the guide (27) with the margin devices Will be fixed on the frame of the machine.

. What I claim is 1. In a Writing machine comprising a frame and a carriage, the combination of a guide on the carriage, a margin-adjusting device slidably mounted on said guide, a rack on said device, a rack on the carriage alon side said device, means for moving the racc on said carriage into engagement anddisengagement with or from the rack on said device, an abutment on said device, a stop on said frame in-the path of said abutment, a biased displaceabl e catch on said device adapted to engagesaid.stop,and an abutment on said catch adapted to be engaged by the rack on said carriage and thereby to displace said catch.

2. In a writing machine comprising a frame,tand a carriage, the combination of a guide on the carriage, a margin-adj listing device slidably mounted on said guide, a rack side said device, means for moving the rec on said device, a rack on the carriage along;

von-said carriage into engagement and disengagement with or from thefrack on said devlce, an abutment on sald devlce, a stop on said frame in the path of said abutment, a

spring-biased pivoted latch having a hook on one arm adapted to engage vsaid stop and a lug on the other arm in the path of movement of the rack on said carriage.

, In testimony whereof I have hereunto set In hand.

y CAMI'LLO OLIVETTI,

Images