US1256517A - Type-writing machine. - Google Patents

Description

H. A. CARHART. TYPE WRITING MACHINE. APPLICATION FILED Nov. 21` I9I6.

Patented Feb. 19,1919F 2 SHEETS-SHEET I INVENTUR WIWI-:5555

H. A. CARHART.

TYPE WRITING MACHINE.

APPLICATION FILED NOV. 21| 1916. 1,256,517.

Patented Feb. 19, 1918.-.

2 SHEETS-SHEET 2.

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HERBERT A. CARHART, F SYRACUSE, NEW YORK, ASSIGNOR T0 REMINGTON TYPE- WRITER COMPANY, OF ILION, YORK, A. CORPORATION OF NEW YORK.

TYPE-WRITING MACHINE.

Specication of Letters Patent.

Patented Feb. 19, 1918.

' Application led N cvember 21, 1816. Serial No. 132,555.

i To aZZ wko-m it may concern:

Be it known that I, HERBERT A. CARHART, citizen of the United States, and resident of Syracuse, in the county of Onondaga and State of New York, have invented certain new and useful Improvements in' Typewriting Machines, of which the following is a specication.

My invention relates to typewriting machines and has for its principal object to provide certain improvements in the linelock mechanisms of such machines', and particularly to provide means for locking the space bar of the machine along with the printing keys, so as to insure always a correct margin at the left side of the paper.

To vthe above and other 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 front-to-rear vertical sectional view on a reduced scale of a typewriting machine having` my invention embodied therein, the section being takenpartly near the middleof the machine and partly near the right-hand side of the machine.

Fig. 2 is a fragmentary rear elevation, partly in section and showing my novel mechanism.

Fig. 3 is a fragmentary side elevation of the upper rear part of the line-lock lmechanism, parts of the machine being shown in section.

Fig. 4 is a'perspective view of a portion of the mechanism.

Fig. 5 is a fragmentary plan view of a portion of the mechanism.

In all of the figures parts are broken away or omitted as has been found convenient.

I have shown my invention embodied in a Smith Premier No. 10 typewriter. The main frame of this machine comprises side plates 1, a top plate 2 and a transverse `back plate or bar 3 in the base of the friction balls 8 is adapted to traverse a stationary rail 10 which is secured to standards 11 rising from the top plate 2. Said carriage is fed in letter space direction by means of a spring 12 mounted in a drum 13, which drum is rigid on a shaft or axle 14, which is journaled in the back plate 15 and front plate 16 of a framework or housing secured to the under side of the top plate 2. The spring 12 is connected at 'its inner end with the hub of a. large gear wheel 17 journaled on the shaft 14 and meshing with a feed rack 18 on the carriage 7. Another large gear wheel 20, loosely mounted on said shaft 14, meshes with said rack 18 and also with a pinion 21, which pinion is loose on the shaft of an escapementwheel 22, which shaft is journaled on pivot screws 28, one mounted in the plate 15 and the other in a bracket 24 secured to the front face of the plate 16. The pinion 21 is connected with the shaft of the escapement wheel by means of a ratchet-toothed clutch 25. The escapement wheel 22 is controlled by feed dogs 26 on a dog rocker 27 which is pivoted on pivot pins 28 passing through the two arms of a bifurcated bracket 30 which is secured by screws 31 to the plate 16.

The type bars 32 are pivoted by means of ball bearings on two segments 33 and are operated by means of radial links 34 and sub-levers 35, the latter pivoted at 36 in a sub-lever segment 37, and each controlled by a returning spring 38. rl`he printing keys 40 have stems 41 passing through the plate 5 and pivoted to bell cranks 42 which are connected by links 43 with the sub-levers 35. Each of said sub-levers has an arm 44 adapted when that sub-lever is operated to move toward the rear of the machine a segmental universal bar 45, which bar is mounted for parallel motion on two transverse rock shafts 46 and 47, the first above the second. The shaft 46 has two upstanding arms 48 which are pivoted to brackets 50 of the universal bar 45 near the ends of said universal bar, and the rock shaft 47 has an upstanding arm 51 from which a pin 52 projects into a slotted ear 53 secured to the universal bar 45 at or near the middle thereof. Said rock shafts 46 and 47 are constrained to rock in unison by means of a link 54 (on the left side of 'the machine) connected at its upper end with an arm 55 projecting toward'the rear fromthe shaft 46 and at its lower end with a similar arm 56 projecting rearwardly from the rock shaft 47. The rock shaft 47 1s connected with the dog rocker 27 by means of a link 57 pivoted at its upper end `to the rearwardlyl directed arm' of said dog rocker and at its lower end to an arm 58 projecting rearward from the rock. shaft 47, the lower'pivot consisting of a pin and slot connection 59 whereby thelink 1s operated by the arm 58, but can move downward independently of said arm when the dog rocker is operated by the space key. A spring60, acting on the arm 56, constitutes the returning spring for the universal bar. The dog rocker is provided with a returning spring 61 connected at its upper end with a pin 62 projecting from the bracket piece 30 and at its lower end to a long screw 63 screwed into the dog rocker yand. projecting downward therefrom.

The space key 64 is of the usual Smith Premier construction and arrangement and it vhas a stem .6421 which is pivoted to a guide link 69 and which is connected with an arm 65 projecting` from a fore and aft roc-k shaft 66 journaled at its ends in the plates 3 and 4. Near the back ofthe machine this shaft has an arm 67 which is connected by a link 68 with a rockingr frame or yokepiece 70 which is pivoted on on e of the pins 28 on which the dog rocker is pivoted. T his yoke-piece is o f peculiar construction, being stamped and bent up out of sheet metaal. It comprises a horizontal yoke-part to which the reference numeral 70 is directly applied in Fig. 2 and which lies beneath one of the branches of the bracket 30. The metal is bent upward atthe right and left-hand sides of said branch, forming' two wings which are perforated and through which perforations the pin 28 passes. From said pin `or pivot 28 said wings areprolonged a suitable distance toward the rear of the machine and one of them is bent toward the'l right or toward the observers'left in Fig'.

2 to constitute an arm 71 to a forwardly bent ear of which the link 68 is pivoted. The other wing of the yoke 70 is bent toward the observers right in Fig. 2, forming an arm 72, the end of which lies over the rearwardly projecting arm of the dos rocker 27. It will be noted that the link 68 is connected with the arm 71 at the rear o f the pivot v28 so that when the space key 1s opi erated and this link is pulled downward the rear part of the yoke-frame is rocked downward about the pin 28 as a pivot, and the arm- 72 causes the dog rocker to rock with the yoke-piece 70. with the result that the space 'key is operatively connected with the dop; rocker independently of the universal bar 45. It will be perceived that the .A upper edge, as shown in Fig. 2, andv aline- .lock device or. slide 75 is mounted on lsaid bar and is adjustable along said bar, said device being retained. in adjusted position by means of a spring pressed latch 76 pivoted at 77 to the device 75 and. engaging saidteetli. On the front face ofsaid linelock piece or slide 75 there is mounted a bell ringing cam 78 and also a cam 80 made in the form of a roller, said cam or roller con- :stitutinga part of the link lock mechanism. The parts of the line lock mechanism onv the stationary frame comprise across bar 81 v pivoted at its ends tothe standards 11 vin such a way as to' be capable of rocking about atransverse horizontal axis. Near its middle said bar has mounted thereon a sliding bolt 82 having a nose 83 adapted to beengaged by the bell ringing cam 78 and by the line locking roller 80, which cam and roller move the bar 81 in directions transverse to the li-ne of carriage travel. Said cam 78 is adapted to cam the nose upward and means not shown are provided for ringing the bell when said nose drops off of the cam. The roller is so located yas to cam the nose V83 downward, thus rocking Ythe har 81 in the other direction from the cam 78. Near its left-hand end said bar 81 has a hook 84 vdependingI therefrom and when the bar is 45 the link 85 moves downward, but when the bar 81 is rocked by the roller 80 the hooked upper end of the link 85 will be locked by the hook 84 and the universal bar 45 will thereby be locked against operation. The bar 81 is provided with a spring restoring device comprising a puppet 87, with a widehead, which bears against the Hat' under Side of the bar. Said puppet is mounted in a barrel 88 having a compression spring in the bottom thereof.

It will be noted that this line lock thus far described and which is the line lock heretofore in use in the Smith Premier machine, locks the universal bar 45 and does not lock the space key. A second slide 75, mounted on the bar 73, carries a margin stop 89 which arrests the carriage when the latter is drawn back to the right to begin aV new line, said lstop conslstngr of a lug projecting from the adjustable slide.

The carriage is capable of being movedon ast where the roller 80 operates the line ock, a margin release key, presently to be described, being provided for th1 s purpose, and said carriage is provided W1th a final line locking device consisting of a ca m arm 110 depending from a bail 111 which, by means of arms -112, is suspended from the typewriter carriage, said bail constitutmg part of the carriage release mechanism of the machine. The cam arm 110 1s so disposed that when the carriage approaches the eXtreme left-hand position to which itis capable of traveling, said cam arm rldes over the bolt 82, as shown in Fig. 3, and depresses said bolt and rocks the bar 81 and throws in the lock 84.

At the extreme end of its travel the carria ge is positively arrested by means of stops which include a lug 113 which proJects from the underside of the carriage 7, near the end of said carriage, as shown, forexample, in Figs. 2 and 3. This lug is adapted to strike the upwardly and forwardly proJecting end of a screw 114 which is screwed 1n from the rear through the stationary rail 10 at or about the mid-length of said rail.

The escapement wheel has rigidly connected therewith a ratchet wheel 115 which is engaged by a spring pressed pawl 11G adapted to prevent backward rotatlon of said ratchet wheel and of the escapement wheel 22.

When under ordinary conditions the carriage is drawn back toward the right until it is arrested by its margin stop 89, the pawl 116 prevents backward turning of the escapement wheel 22 and the carrlage is allowed to return by reason of the backward turning of the pinion 21. This pinion is connected to the escapement wheel by a ratchet-toothed clutch 25, which clutch can yield and allow the return motion of the carriage, or the return of the carriage can be accompanied by an operation 'of the care riage release mechanism, most of which is not here illustrated but the effect of which is to move the clutch member 25 toward the rear and thus let the pinion 21 run free. In either event the escapement wheel 22 is stationary during the return motion of the carriage and when the carriage is arrested by the margin stop the clutch member 25 engages the pinion 21 and causes theicarriage to come to rest at a predetermined letter space position, depending upon the adjustment of the margin stop. The fault, which it is the principal purpose of my invention to correct, has arisen when, after causing the roller 8() to move beyond the bolt 83 to write additional matter beyond the ordinary line locking position, the carlock has again been t rown in by the cam arm 110. If the carriage is withdrawn as soon as the line lock is thus thrown in, it will be arrested oy the margin stop and will be positioned correctly. But, if, after said line lock has been thrown in, the space key were given one or two operations, the carriage would move another space or two toward the left until it was positively ar-` rested by the stops 113, 114. In this event the last operation of the space key would not have resulted in a complete step of the carriage; and after said last operation, the carriage would not be held by the normally enga ged one of the dogs 26, but said dog would stand between two of the teeth of said wheel, which Wheel would thus have made some fraction of a step. When the carriage was withdrawn to the right under these conditions and arrested by the margin stop, and the clutch 25 had caught against the pinion 21, the feed dogs being between two teeth of the escapement wheel would allow the carriage to make a single step in advance of the position to which it would have been brought under normal conditions, with the result that the next line of Writing would begin not at the same letter space as the other lines of writing, but one letter space to the right thereof, and the neatness of the page of writing would be marred. If, for eX- ample, the margin stop was set to cause each line to begin at' 10 on the carriage scale,`

then every time the carriage was brought down by the space key to a full stop the next succeeding line would begin at 11 instead of 10,

In order to correct this fault I have provided special means whereby the line locking mechanism not only locks the printing keys but locks the space key also so that the additional operation of said space key, after the printing keys have been locked, cannot take place and the occasional indentation of the margin will be prevented. This locking means includes a lever 90, Fig. 3, of the first order pivoted at 91 in a bracket 92 secured by screws 93 to the top plate 2. The forward arm of said lever 90 is connected by means of the link 94 with the arm 71 of the yoke-piece 70 to which arm said link is pivoted as by a Cotter-pin 95. The construction is such that whenever the space key is operated the link 94 is pulled downward and the rear arm of the lever 90 is moved upward. But said rear arm lies beneath the rearwardly directed arm of the bar 81 and in such position that when said bar 81 is in its normal position the lever 90 can rock freely, but when said bar 81 is cammed down by the roller 80 or cam 110 to locking position, as shown in Fig. 3, then said bar 81 will intercept said lever 90 and prevent the rocking of said lever and, consequently, will prevent operation of` the space key.

rEhe lme lock release of the Smith Premier machine includes a key, the stem of which is connected to an arm on a forev and aft rock 4shaft 98 iournaled in the frame plates 3 and 4. The key and lts stem are not shown because they would interfere with the showing of the space bar connections in Fig. 1. Near its rear end said shaft has an arm 100 to which is pivoted the lower end of a link 101 which at its upper end is pivoted to an arm 102 of a rock shaft 103 suitably journaled at the under side of the top plate 2. Said rock shaft at its inner end is bent upward, forming an arm 104 which passes through a suitable opening in the bolt 82 of the line-lock mechanism. The construction is such that when the key 96 is depressed the shaft 103 1s rocked so as to move thearm 104 toward the front .of the machine, thus withdrawin the -nose 83 of the bolt 82 out of the way o the roller 80, whereupon the bar 81 rocks back to itsnormal position and releases the lock. They shaft 103 1s provided with a restoring spring 105 which normally holds the bolt 82 in its rearmost position. It will be Aperceived that when the ordinary line-lock is released by this release key the auxiliary space key lock is also released by the return of the bar 81 to its-normal position. Various changes can be made in the details of construction and arrangement without departing'from my invention.

What I claim as new and desire to secure by Letters Patent, is

1. In a typewriting machine, the combination-of a carriage, a space key, a lever adjacent said carriage and mechanically connected to and vibrated only by said space key, and a part displaced by said carriage, said part when so displaced servin to 1ntercept said leverl andthercby to ook the space key. v

2. In a typewriting machine, the combination with a carriage,an escapement, printing keys, a connectlon from said printin keys to said escapement, a space key, an

v an independent connection from said space key to said escapement, of a line locking bar, means whereby said bar when operated at the end of a line locks said printing` keys,-

and independent means whereby said bar locks said space key.

3. In a typewriting machine, the combination with a carriageean escapement, printing keys', a universal bar for said printing keys connected to said escapement, a space key and an independent connection from said space key t0 said escapement,'of a line locking bar, means whereby said line locking bar when operated at the end of a line locks said universalbar, and independent means whereby said line locking bar locks said space key.

4c. In a typewriting machine, the combination with a carriage and a space key, of `a part that is moved 1n one direction, by

the carriage at the end of a line, and a second part that is moved in the opposite diaol at the end of a line and a lock for said printing keys controlled by said device; of a line lock for said space key comprising a lever separate from said printing key locking mechanism, said lever being connected with said space key and normally vibrated freely thereby` said lever being in position to be mtercepted directly by said displaceable device when the latter is operated at the end vof a line.

6. In a typewriting mfachine, the combi- I nation with a carriage,.a space key, printing instrumentalities and line lock mechanism for said printing instrumentalities, said mechanism including a line lock bar located adjacent the carriage, means whereby said carriage displaces said bar at the end of a line and means controlled by said bar .for locking said printing instrumentalities; 'of means for locking said space key including a part separate from said means for locking the printing instrumentalities, saidl separate part being located adjacent said displaceable bar and connected to said space key and adapted normally to be vibrated freely by said space key but in such position as to be intercepted by said bar when said bar is displaced at the end of a line.

7. In a typewriting machine, the combination'with a carriage, printing keys, a universal bar for said keys, and line lock mechanism for locking said universal bar, said line lock mechanism including a device adjacent said carriage and carriage controlled means-for displacing said device, of a space key, and a lever adjacent said carriage and said device, said lever being separate from nation with a carriage, printing keys, a universal bar for said keys, and line lock mechanism for locking` said universal bar, said line lock mechanism including a bar adjacent said carriage and means carried by said carriage for rocking said bar, of a space key, a lever separate from said universal bar locking mechanism and being connected with said space key and normally freely vibrated thereby, said lever being so situated as to be intercepted directly by said bar'to lock the space key when said bar is rocked by said carriage.

9. ln a typewriting machine, the combination with a carriage, an escapement, printing keys, a universal bar for said printing keys connected with said escapement, a space key and an independent connection from said space key to said escapement, of a line locking bar, means whereby said line locking bar when operated at the end of a line locks said universal bar, and ak lever separate from said universal bar locking mechanism and being connected with said space ke and normally vibrated freely thereby, sai lever being directly locked by said bar when the latter is operated.

Signed at Syracuse, in the county of Onondaga and State of New York, this 18th day of November, A. D. 1916.

HERBERT A.. CARHART.

Witnesses:

CLARENCE E. DAvms, M. J. GALLAVIN.

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