US944229A - Type-writing machine. - Google Patents

Description

A. I. BRIGGS. TYPE WRITING MAGHINB. Y APPLICATION FILED 00T.12, 1908.

Patented Dec. 21,1999.

A TTORNE Y.

A. J. BRIGGS. TYPE WRITING MACHINE. APPLIOATION FILED 0T.12,.1908.

Patented Dec. 21, 1.909.

mm. qm @n I/V/TNESSES: 5 M 7%,664/

ATTRNEY.

UNITED sTATEs;

ARTHUR J. sarees, or sYaAcUsE, NEW` YORK, AssIGNoa To THE SMITH PREMIER TYPEWRITER COMPANY, or sYRAcUsE, NEW YORK, A coEroRATIoN oF NEW YORK.

TYPE-WRITING MACHINE.

Specification of Letters Patent.

Patented Dec. 21, '1909.

vApplication filed October 12, 1908. Serial No. l157,401. f

y is a specification.

l, My invention nrelates to typewriting machines and particularly lto the line lock and margin-stop mechanism of such machines.

In line locks as heretofore constructed the carriage, When the Send of the line is reached, engages a stop which arrests-said carriage and which throws into operation adevice foi-'locking the printing keys. IVith mechanism of'this character .it sometimes happens that the carriage is arrested but the locking device fails to operate immediately,

with the result thatv one letter is written on top of another. Moreover, whenthe second letter is writ-ten, the escapement is operated, butl the carriage having vbeen arrested, it doesliot move a complete letter space.- The result-is' that when the carriage is released after being drawn back to begin a newline,

it moves one letter vspace distance, thus causing the new line to begin onespace in advance lof the margin and -causing the lefthand margin tobe irregular.

It is one oft-he principal present invention to obviate these diliiculties.l

My invention also has for its object the improvement of the line locking and margin stop devices in vsome other respects Whlch will appear hereinafter.

To the above and other ends my inven-y tion' consists 1n certam features of construction, and combinations andA arrangements ,of parts all of'whicliwill'be fully Aset `forth herein and particularly pointed out-.inthe claims.

In the accompanyingI drawings, Figureil is a front to rear-vertical sectional view of a typewritingmachine, 4the main frame being shown in section'about on the line :c+-:vof Fig. 4, but parts'being shown in central sec? tion. 2 is a sectional view .taken about on line 1y-y of Fig, 4 and showing the linelock in roperated position.' Fig.'3 is a fragmentary sectionalview vof 'part of the mechanism taken centrally through thefstationary stop and showing said stationarys'top withdrawn out of the path ofthe 'coperating obj ectsof -the devices on the carriage. Fig. 4 isa rear elevation of the machine .with parts omitted, parts in section and parts broken away. Fig. 5 is a fragmentary top plan view of parts of the mechanism. F 1g'. 6 is a view, partly in section, showing the bell ringer. Fig. 7 is a fragmentary front elevation showing a bar that is mounted on the car-- raige and that carries part of the line lock and margin stop mechanism. p

For the purpose of lllustralon I have' shown my mvention embodied 1n a front-f strike machine known as the Smith Premier No. 10 typewriter. The main frame of thisl machine comprises side plates 1, having cor# ner posts 2 which support a top plate 3. Said side plates are connected together at the rear by a back base plate 4 and at the front by a keyboard plate which is bent down to form a front plate 6. A cylindrical platen 7 is mounted on a carriage 8 which is mounted by means of ball bearings on a stationary rail 9 4,supported by standards 10 rising from the top plate 3. The carriage is propelled in letter space direction by a spring drum and certain gearing which are not shown herein but which are shown and described in an application of Alexander T. Brown filed December 10,1906, Serial No. 347 ,104. The I carriage is controlled in its step by step motion by means of an escapement comprising a tooth 12 mounted on the upper end of a shaft 13 that is geared to the carriage, said shaft being journaled in a bracket 14. A light universahbar 15 normally stands in front of the platen and said universal bar forms-part of a frame that is pivoted at 1G to the bracket 1 4. Said frame also comprises a pair of feed dogs 17 which control the tooth 12. This escapement and carriage feed mechanism is more fully described and is claimed in theap lication of Alexander'. T.

- '.Brown, above re erred to.` The universal bar-15 is operated by being struck by type bars .18 which are arranged for a front-strike onthe platen, said .type bars being mounted on segments20 and 21 by ball bearings. The type bars are operated by radially disposed ylinks 22 pivoted to the heels of said type bars and at their outer ends pivoted at 23 to radially disposed sub-levers 24 which are plvyoted on a' pivot wire 25 laid in apsub-lever segment 26. The sub-levers 24 are operated vby links 27 that extend toward the front of the machine and are connected at their forward ends to bell crank key levers 28 which are operated by the stems-29 of thev printing keys 30. The construction is such that when one of said printing keys is depressed the vcorresponding link 27 is drawn toward the front of the machine, rocking the sub-lever -24 toward the front of the machine and throwing the type bar to printing positin, the type bar in the last part of its motion ,10 striking the universal bar and operating the escapement. Each of the sub-levers 24 is provided with a returning spring] 31 and .each of said sub-levers has an outwardly extending arm 32 that is adapted to operate a 15 universal bar 33. This universal bar consists of a segment made of angled metal and supported near'its ends by arms 34 which project upward from a rockshaft 35 and which at their up er ends are pivoted to ears 36 projecting rom thje iipiversal bar 33. Said universal bar is controlled near its middle by an arm 37 rising from a rock shaft 38 and pivoted at its upper end to a bracket 39 projecting from said universal bar.

link 40 connects an arm 41 of the rock shaft 35 with -an arm 42 of the rock shaft 38 and compels these two rock shafts to move to- .gether in such a way that alllparts of the universal bar 33 have the Vsame motionl toward the rear of the machine when a key is operated. Said universal bar is restored to normal position by a springv 43 connected with the arm 42.

. In the `Smith Premier No. 10' machine the universal bar 33 is utilized lto 'operate a ribbon vibrator, which vibrator,l however, is not shown in the presentcase; and it is this-universal bar 33 thatiis locked when the carriage reaches the end of a line, lfrom 40 which it will be seen that the line lock'dos not affect the escapement.

The line lock devices comprise a link which at its lower end is pivoted to the arm 41 and at its upper end is formed with an n 45 elongated slot 46 through which there passes loosely a headed screw 47 whichx is threaded- Ainto the rearl leftfhand post 2. The screw 47 and slot 46. serve to guide the upper end of the link 45 but permit it to move downward when the universal bar 33 is operated. The margin stop and line lock devices on the carriage comprise a toothed bar 48 which is supported by arms 49 depending from the carriage behind the rail 9. As shown in Fig.- 7 this bar is toothed on its upper edge and carries a marginstop piece 51 and a line lock piece 52. Each of these pieces has ears 53 bent over the top and under the bottomA edge of the bar 49'and'serving vto retain said pieces 51and 52 on the bar butwith freedom to slide lengthwise of the bar. These pieces are retained in any position 'along tlesbarfatc ies 54 to which they may be adjusted by pivoted-at 55 and controlled'by springs 56, es the free ends of the latches engaging 1n the and pivoted art-.84 to the front plate 6./ The notches of the bar 49,which notches are spaced a letter space distance apart.I Themargin stop piece 51 has projecting toward the front of the machine ther; rom a lug 57 having its right-hand face'58 abrupt and its left- 70, hand face 59 inclined. This lug 5-7 coperates with a stationary stov 61 which is mounted on a bar 62 that hes beneath the rail 9 and is supported at its ends by the standards 10. f

The stop 61fconsists of a part of a plate or block 63 which is mounted on the bar62 with freedom to slide in a fore-and-aft di' rection. Said plate 63 lies ontop of the bar 62, but vthe part 61 is depressed into a slet 80 formed between two ears 64 on the bar 62. The plate y'63 is held against detachment by means of a shouldered and headed screw 65 threaded into the bar 62, and passing, through a slot 66 in the plate 63. At its g5 forward end 'the plate 63 has a hole therethrough, through which passes the upper end of anl arm 67 that is bent olf from a rock shaft 68, the upperF end of the arm passing through a slot 69 formed between 90 ears of the bar 62. The whole construction is such as to guide the plate 63 and stop 61 in their fore-'and-aft motion, buty to prevent motion of said parts laterally of the Inachine. The rock Shaft 68 ispivoted'in a 95 bracket 71 secured to the under side of the top plate 3, and the arm 67 passes upward through a suitable opening in ythe top plate.

4At its right-hand end t-he`shaft'68` has a forwardly projecting arm 72 to which is pivoted a link 73 by, a pin and slot connection 74. The lower end of the link 73 is pivoted to an arm 75 projecting from a rock shaft 76 that is journaledat its rear' end in the back plate 4 and at its forward end in the front plate 6. Said rock shaft is controlled by areturning spring 7 7 thevtension of which is exerted to hold the link 73 in its normal upper position. *,At forward end the rock shaft 76 has` an arm 80 projecting therefrom to which arm is pivoted the lower end ofthe stem 81 .lock release key 82. The stem 81 is also controlled by a guide link83 parallel to the arm 80 11s construction is such that, if theV key 82 be de- 'pressed the rock shaft68 will befrocked to move thejarm 67- and sto 61 ltoward the the path of the front of the machine out o margin stop 57, as shown in Fig. 3.

spring 7 8, coiled about the shaft 68, is connected tosaid shaft for normally holding 'the stop 6-1 in its rear position.

.When the carriage ,is drawn" toward the right, it is' arrested by. the abrupt face 58 of the-margin stop 57 contacting with the desired to. write in the' margi'n','this 'may be done by depressing the key .82 .andtwithdrawing the' sto 51 out of the path ofthe stop 67. When t e carriage of the margin and line" moves toward the left out of its marginal position the inclined face 59 of` the stop 5 7 will cam the stop 61 toward the front ofthe machine without obstructing the motion of the carriage. y

For the purpose ofv ringing the bell and of locking the printing instrumentalities at the end of a line the bar 62 is pivoted at its ends. Each end of said bar is formed lwith a trunnion which trunnions Aenter suitable axial bearings formed in screws 90 threaded through the brackets 10 so that the bar is free to rock in either direction but cannot move endwise. The positionof the stop 61 maybe adjusted by means of these screws 90. The bar 62 is controlled by a fiat topped puppet or plunger 91 which is pressed upward against the fiat underside of the bar (32 by a spring 92. ASaid puppet 91 lis seated in a suitable tube or socket piece 93 secured to the top 'plate 3 and the spring92 is seated in the puppet 91, which is made hollow for the purpose. If the bar 62 be rocked in either direction,` it will depress the puppet against the tension ofthe spring 92 and said .spring will restore the bar 62 to its normal position when said bar is released. ln order to ring the bell `the piece 52 has formed on its forward side a. projection or lug 94 having its left-hand upper corner beveled olf as shown at 95, said bevel terminating in a flat upper surface 96. When the carriage approaches the end of a line the bevel 95 rides under the stop Gland cams said stop upward, thus rocking the bar 62 toward the front of the machine. The bar is retained in this rocked position until the stop 61 drops off of the right-hand end of the flatpart 96. Said bar 62 has an arm 97 depending therefrom near yits right-hand end and said arm is adapted to contact With the arm 98 of the bell clapper 99 which is adapted to strike the bell 100, which is mounted onone of the corner posts 2. The arm 98 of the bell clapper constitutes parts of a yoke shaped frame which is pivoted on a pin or screw 101 projecting from the post 2. Said yoke-frame has an elastic arm 102 that normally contacts with the underside of the top plate 3 and holds the clapper slightly out of contact with the bell. When the bar 62 is rocked in the manner above described by the lug 94 the arm 97 raises the bell clapper, moving the parts to the dotted line position of Fig. 6,and whenthe stop 61 escapes from the lug 94 and the parts drop back to normal position the clapper strikes the bell, slightly bending the arm 102. The right-ha11d part 94 of the lug 94, is beveled so that, when thc carriage is moved toward the right, this bevel' ca`ms the stop 461 forward which permits the lug 94 to pass said stop.

pending from the bar 62 near thel 1efthand The line lock comprises an arm 103, de#

end thereof., seid arm 103 projecting downward through a suitable opening in the top plate and having a hook 104 formed on its lower end and projecting to the rear of the link 45, which as has been explained, is connested with the universal bar 33. Said link 45 at its upper end is formed with a rearward extending hook 105. The -construction is such that if the bar 62 be rocked by depressing rthe stop 61 the arm^103 will be rocked toward the front of the machine, throwing the hook 104 under the hook 105 and locking the link 45 against operation, with the result that 4the universal bar 33 is also locked against operation. The bar 62 is rockedl to operate the line lock by means of a roller 106 journaled on the"forward face of the piece 52 and having its center a little above the upper surface of the stop 61 so that when, inthe motion of the carriage toward the left, said roller engages said stop, it will depressl the stop and rock the bar 62 in a direction the opposite of that in which it is rocked by the lug 94. It will be seen that the bell is operated by rocking the bar 62 in one direction and that the line lock is operated by rocking said bar in the opposite direction; and it Will also be seen that the 'roller 106 does not act as a stop to arrest the m'otion of the carriage.l In casethe keys are 'being operated very rapidly it may happen that When the hook 104 is irst moved forward by the devices that have been described, the link 45 will already be in a depressed position so that said hook will not be able to move forward under the hook 105. If the carriage were arrested by the roller 10.6 this would resultl in one letter being written on another but with the present construction no such effect will be produced as the escapement will be operated and the carriage will step as usual until the link 45 does return to normal position when thel hook 104 will snap in under the hook 105 and lock the keys. 1

It Will be perceived that it is advantageous to have'the arm 103 connected with the bar 62 by a yielding connection so that said bar 62 may be rockedby the motion of the carriage, even though the arm 103 cannot move forward at that moment under the hook 105. To this end the arm 103 is not rigidly mounted-on the bar 62 but said arm at its upper end is bent over the top of the bar 62, the device comprising a horizontally disposed branch 107 of the arm 103. vA screw 108 passes upward-loosely through a suit? able hole in the bar 62 and is threaded into the part 107, and a spring 109 is coiled about said screw beneath the bar 62 and is compressed between'said bar and the head ofthe screw. T he construction is such that this spring normally lholds the part 107-pressed down flat against the upper surface of the bar 62 but said part 107 and the arin 103,

fao

may be rocked on the bar 62 by slightly compressing the spring 109. The part 107 is add'tionally/guided' by a screw 110 which passes loosely through an opening in the part 107 and is threaded into the'bar 62. If

the bar 62 is rocked at a time when the link 42 is in a depressed position the arm 103 moves forward until the hook 104 presses against the rear tace ofthe hook 105, the bar 62 continuing to rock against the tension of the spring 109. When the link 45 returns to normal position the hook 104 is snapped in under the hook 105 by said spring 109.

The construction of the line lock mechanism so that it does not act as a stop to ar' restthe canriage, has an important result in preyenting irregularity in the left-hand margin otthewriting. If the carriage were brought to rest by coming againsta stopand the linelock did not come into play immediately, as often happens in rapid operation, the escapement tooth 12 would be released from the dogs 17 by the operation ofthe type bars but said tooth would not make a rotation on account of the fact that the carriage was arrested by the stop. The result would bethat when the carriage'was drawn back to begin a new line the tooth 12, whichv corresponds to an ordinary escapement wheel, would have already begun a rotation and this rotation would be completed when the carriage was restored to the control` of the escapement at the beginning of the line. The carriage would thus step one space be'- fore the first letter of the line was written and this particularl line would begin one letter space distance to 'the right of the general margin -of the page. This trouble, which is present in typewriters generallyas at present constructed, is obviated by dispensing with the stop. It the line lock does not come into play at the {irst key stroke after the stop 61 is cammed down by the roller 57, the carriage, nevertheless, continues to space until said lock does come into play and any operation of the escapement will be completed.. When the present line lock is employed therefore the left-hand margin ot' the writing is made uniform. If, when the line lock is operated, it be desired to write a few more letters to complete a Word or syllable, the line lock may be `released by depressing the key 82, thus withdrawing -the stop 61 from the roller 106 and 2 permitting the spring plunger 91 to rock the bar 62 back to normal position.

Various changes may be made without de :parting from my invention.

VvVlhat I cla-11n as new and desire to secure by Letters Patent, is z- 1. In a typewriting machine, the combination of acarriage, escapement mechanism for controlling said carriage, a universal bar for said escapement mechanism, a separate universal har, line lock mechanism for lockstrumentalities,

ing said 'separate universal bar without'at fecting the irst named universal bar, and means on the carriage for operating said locking mechanism, said means not being adapted to arrest the carriage.

2. In a typewriting machine,

the combination of a carriage, printing instrumentalities, a universal' .bar for said printing ina lock for -said universal bar, means moved by the carriageat the endv of 'a line for operating said lock, said means not being adapted for arresting the carriage, anda spring connection between said means and said locking device to enable said means to be operated when the uni versal banis out of normal position.

3. Ina typewriting machine, the combination of a carriage, a cam mounted on said carriage, a rocking bar mounted onthe main frame and adapted to be rocked by said g5 cam, a line lock operated by such rocking oi' said bar, and a yielding connection between said line lock and saidbar to enable said bar to be operated in case a key is inde, j pressed position whensaid bar is operated.

4. In a typewriting machine, the combi,- nation of a margin stop, a coperating stop,

a rocking bar on which said cooperating stop is slidably mounted, a key in the key'- board of the machine, and means operated by said key for sliding said stop on said rocking bar out of the path of said margin stop.

5. In a typewriting machine,the combination of aline lock ydevice 103, a rocking device 62 on which. said device 103 is mounted, a screw or pin' 108 in one of said devices, and aspring '109'acting on said pin` or screw and normally maintaining said devices in fixed relation. f

f 6. In a typewriting machine, thecombination of a margin stop 61, a rocking support on which said stop is slidably mounted,

an arm passing through saidstop in such a manner as not to interfere with the-rocking 11o of said support, and a release key connectedf. with said arm. l j` 7. In a typewriting machine, the combi?? nat-ion of a carriage, an operating device 94 mounted on said carriage, a coperating de- 115 vice 61 and a bell ringer operated b said device 61, said device 94 being beve ed in two directions, one bevel moving the device 61 in one direction to ring the bell and the other bevel moving the device 61 in another 120 direction at right angles to the first onthe return of the carriage,`to permit said device 94 to pass said device 61.

8. In a typewriting machine, the combination of .a carriage, printing keys, a part 125 that is movedl at each operation of a printing key,` a rocking bar, means for rocking said bar at the end of a line ofwriting, a hook operated by the rockingof' said bar and adaptedto engage said movable part to 13e Y prevent the operation of the printing keys,

position.

and @spring connection between said rock- 'ing bar and said hook, said spring being placed under tension by the rocking of seid bar when said movable part is outo normal 9. In a typewriiing machine, the combination oi a carriage, printing keys, a. nni-v l ing sind bar at the'en. 'of e -iine of Writing, and a hook mounted on said rocking bar and adapted to vengage said link to lock said universal bnr..

Signed at Syracuse, in the county of Onondaga, and State' of New York,'this 8th dey. of Oct., A. D. 1908.v

ARTHUR J. BRIGGS.

Witnesses E. E. Coni', H. I. SnDDoN.

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