US903443A - Type-writing machine. - Google Patents

Description

A. 'r. BROWN 5; J. 11'. BARR.

TYPE wm'rmu mom. nruonrox' rum? IA! 1a, 1006.

Patented Nov. 10,1908.

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H ITNESSES MW J/Qv-mW v ,4 TTORNE Y.

A. T. BROWN &'J. H. BARR.

Patented Nov. 10, 1908.

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TORS.

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6 ATTORNEY.

A. T. BROWN 6: J. H. BARR.

TYPE WRITING MACHINE.

nruonxox FILED MAY 1a, 1905.

903,443. Patented Nov. 10, 1908.

4 SHBETS S HEET 3.

o r L W1 TNESSES INVENTORS JMW [3y I I 7 A a Y A. T. BROWN 6: J. H. BARK.

TYPE WRITING MACHINE. APPLICATION FILED HAY 1B, 1905.

Patented Nov. 10,1908.

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.25 3 is-a top plan view showing the key action,

YORK, A CORPORATION OF NEW YORK.

a 1;; SAID BARR ASSIGNOR NY, or SYRACUSE, NEW

sr nAousl-z, x 10w ro TYPE-WRITING MACHINE. I

Specification Letters Patent.

Patented Nov. 10, 1908.

Application and May 1a, 1905. serial No. 261.645.

To all -u.'h om it may concern:

Be it known that we, 'A'l lavasm-zn 'l. Buowx and Jens lI. BARR, c1t|/.ens of the United States, and residents of'Syracuse, in

5 the county of OnondagaandState of New Yo.rk, have invented certain new and useful improvements in Type-\Vriting Machines, of which the following is a specification.

()ur invention relatcsto t'ypewriting ma- 1o chines and more especially to the ty we and l key actions of such nnichines, and it ms for its object to provide improved mechanism of thischaracterf l Our invention consists in certain features of construction and combinations .and arran emcnts of parts all of which will be fully set iorth herein and particularly pointed out in the claims.

One embodiment. of our invention is illustrated in the accompanying drawings, in

which Figure l is a front to rear vertical sectional view of a. typewriting machine; Fig. Z-is a rear view in' transverse vcrtiuil section;-Fig.

the u per part of the typewriter being sectione away; Fig. 4 is a view in transverse vertical section of a portion of the key action as seen from the back of the machine; Fig. 5' is an isometrica-l detail view of a. .portion of said kc action; and Fig. 6 is an isometric-a] view 0' a modified foxm'ot' framing for the kc act-ionf iVe have shown our inventionapplied to a 85 front-strike machine. it being more especially designed for use; in machines of this characlcr; butmost of the features of the invention are also applicable to ot herfstylcs of typewritmg mac nines. I r 40 The main frame ofthe machine shown in the drawings comprises tLlmqc portion eon aistiin of side plates 1 connected together by a bacli plate 2. Posts 3, risingfrom the side plates, support a top plate 4. A platen 5 is mounted on a carriage G which is adapted to move back and forth across the machine on rails mounted on the top plate. Said carriage may be drawn across the. machine I) the usual spring drum or "any suitabe means and the motion of said carriage may be cont-rolled by any suitable step by step ('lel 'ries of type bars 12 on th -the. several ty )e bars.

vice. The. details of the means for supporting and controlling the carriage have .not been shownin this case as they form no part of the present invention.

()ne of the objects of the present. invention is to mounta large number of type bars in a front strike typewriting machine and the machine shown in the present case comprises eighty-four such typebars arranged in two 60 series mounted ontwo separate type ha! sag ments, which occupy substantiall the same angular space. with reference to t \e printing point. As shown in the present case t "t. part of the to a plate just in front of the carriage is arched or dome-shaped and two type bar segments 7 and S are secured at their ends to the under side of this portion of the top plate, the segment? being of less radius and nearerto the printing point than the segment 5. .Each of the type barsegmcnts 7 and 8 consists of a curved rod or bar of circular cross section and having cutin its surface a series of annular V-grom'es 5) each of which lies in a planewhich passes through the center of the segments. The segment 7 as shownin Fig. l, is )referabl situated slightly 1 \earer.the back of the mac line than the segment 8. The segments are secured to the top plate 4-by screws 10 whi h pass through the top plate and are threaded mto the ends of the segments. A series of type bars 1] is mounted on the segment 7 and a second se- 0. segment 8. Each of the type bars is formed at its pivoted end with an eye. which encircles the segment and which is internally grooved to form a ball race which cooperates with one .of the grooves .l which also constitutes a ball race. Anti-friction balls running in these cooperating ball races constitute ball bearin for The details (i ithe construction o the ball race in the eye may be varied in any way without departing from As shown in the present-in- 9 8 our invention. stance, said ball raceis formed by two ring: 13 threaded into the eye of the type bar, one of said rin '5 being threaded in from one side v and the other from the other side and each of said rings being beveled on its inner side 16!)" so that the two rings to e ther form 'a V- groove.in which the antllction balls run.

a screw 1:5".

The eye of each type bar is cut through as shown at 13 and said eye may be tightened ILlJU .iL the ln' wing rings by tigl'itening a This particular csistruction of ball bearing type bar is not of our joint invention, but is the sole invention of John 11. Barr. Said bearing is more fully shown and described and is claimed in the application of said John lI..Ba-rr, filed March 16th, 1905, Serial N 250,444.

The free ends of the type bars normally rest in engagement with a cushioned rest or support 14. The type bars 11 are shorter than the type bars 12 and are preferably made of the curved form shown in Fig. 1 so that the free ends of these type bars rest on the same support 14 as the type bars 12 without interferin with the enlarged pivot ends of said type ars' 12. The arrangement is such that in the basket typebars 11 and 12 alternate with each -other.

free-end a socket 15 in which is mounted a single type not shown. Each of the type bars 11 and 12 has projecting from its pivotcnd an ear 16 to which is pivoted the upper-end of a link 17'; the. lower end of which is pivoted to an arm 18 projecting rain the rear end of one of a series of rock shafts 19each of which 'has projecting therefrom near its forward end an arm 20 to which is pivoted the lower end of a key stern 21 having a key 22 mounted on the upper end thereof. The rock shafts 19 are'journaled at their forward ends in angled frame are secured at their ends to t e side plates of the main frame and which ether oon stitute the keyboard of the machine. Each of the key stems 21 passes through a suitable o ening in the horizontal portion of its frame p ate 23. Each of the rock shafts 19 is'p\rovided with a returnin spr' 24 whic is coiled about said rock shaft at itsforward end and which is connected at one end tothe frame plate 23 and at the other end to the arm 20. The construction is such that if any key be depressed its rock shaft 19 will be oslates .23 which 'cillatcd and the link 17 connected therewith will operate the corresponding type bar'to print.

The rock shafts l9 are-journaled at their rear ends in a frame work provided for the purpose. 'lwo strips or bars 25 and 26 extend across the base portion of the machine beneath the segments 7- and 8, being secured at their ends to the side plates 1. A series of verticalframc lates '27 are secured at their upper ends to t iestrip or bar 25 and at their lower ends to the strip or bar 26. Each of the vertical frame lates '27 has rejecting thcrcfrmn a series 0 f opening 29 in whichone of the shafts 1-9 is journaled. In the present instance there are horizontal rows or tiers, "ha

shafts in each tier. Said-rock s eighty-four rock shafts 19 arranged in seven twelve rock Each of the type" cars 28 each aving an afts are also,

l disposed in vertical rows or tiers of seven 5 rock shafts each, and each of these vertical tiers is supported by one of the frame plates 3 27. The cars 28' are arranged slep fashion as 1 best shown in Fig. 1, the highest one on each i plate 27 being nearest the front of the mal chine and the lower ones successively nearer the back of the machine. It results from this arrangement that each of the arms 18 inayproject from its rock shaft 19 in front of the corresponding car 28 and backof the car 28 next above it. Each of the arn|s,18 is bent toward the back ofthe machine at 30 the point at which the link 17 is pivoted to ear 28 in which the corresponding rock shaft 19 is journaled. The advantage'of this ar rangement will be understood by reference to Fi 2 in which the single type baron the erated position. It wil be perceived that the arm'-1-S connected with this t 'pe bar stands back of the car 28 in the same iori zontal tier and rojectin from the next frame plate 27 to the left. fly forming these arms .18 with the off-set bond which has been described any interference between these parts ears 28 also contributes to avoiding interference between'thc various links 17, some of these links being nearer the back of the ma chine than' others." As will be seen by reference to Figs. 1 and 2, said links 17 are curved in various wayswhich' also contributes toward avoiding interference between the different which improves the touch on the keys.

By reference to Fi 2'it will be seen that lwhen the parts are in normal position the arms 18 are inclined upward at a considera key 18 fully depressed and the t we bar fully operated said arms are but-litt e past the-horizontal position. The result of this arrangemen is a the first part of its stroke than it has during the latter part,

the type bar and'a considerable-increase in the speed of the type bar relative to the'key during the latter part of the stroke. This is a great advantage especially in front strike -t writers where the first part-of the'motron of the key not onl has to overcome the inertia ofthe type bar ut also has to lift said type bar against-gravity.

Ve prefer to arrange the two sets, one on each side of the center of the machine, sothat the arms 18 and 20 of each rock shaftextend from'said rock shaft towards the center of. the machine. It observed that the present typewriteris a full key board machine, say, there is a separate key for each type.

rig it hand side of the fi ure is shown in op-' thus giving an easy start to that s to and in the opposite direction at 31, so that the arm 18 is at sonie'distance back 'of the v is avoided. I The stepped arrangement of the j links and also makes said links elastic,

able angle with the horizontal and that when key that has a greater mechanical advantage over the type barduring rock shafts 19 in scans In such machines it. usual to arrange the t with said arms, and type bars operated by lower case keys near the front of the key .board and the upper case keys and other keys that are used comparatively illflt" quently near the back of the key board. It

will be observed that those keys near the front of the machine are connected with rock shafts 19 near the bottom of the machine and those keys near the back of the key board are connected with the upper rock shafts.

It will also be observed that the short type bars 11 are connected with the lower rock shafts and the long type bars 12 are connected with the upper rock shaft. It will thus he 15 seen that those keys which are usul most freuently are connected with the shorter and lighter type bars.

The cross bars or strips 25 and 26 and the vertical frame plates 27 are preferably made of sheet metal, the ears 28 being bent off from the edge of the plates as clearly shown in 5 Each of the frame plates 27 has bent o therefrom at its upper end a horizontal portion 32 and atits lower end a horizontal 2:, portion 33, these horizontal portions being secured to the strips and 26 respectively by rivets or other suitable means.

In Fi 6 we have illustrated a modification of t 1e framework for supporting the rear ends of the rock shafts 19. An inc lined bar 35 is secured to the under side of each of the frame plates 1 by screws or rivets Missing through openings 36 in said bar. 'f to two bars 35 are joined by a series 'of horizontal :5 sheet metal angle-strips or bars 37, each formed with a series of ears 38 having openings 39 therein in which the shafts 19 are journaled; Each of the strips 37 is formed at its ind with an car 40 through which 40 asses a headed screw 41 which is threaded into the bar.35 and supports the stri 27. it will be perceived that according to tiiis modification a frame piece 37 is provided for each horizontal tier of rock shafts, whereas ac- 45 cordin to the form shown in the other figures o the drawings a frame. piece 27 is provided for each vertical tier of rock shafts.

The type bar system and arrangement shown and described in this a plication is not of our 'oint invention but is 818 invention --of John Barr and is claimed in the application of said John H. Barr, filed May 26th, 1905, Serial No. 262,395.

Various changes may be made in the de- 65 tails of construction and arrangement with- 'out departing from the gist of, our several im rovements.

lat we claim as new and desire to secure by Letters Patent, is z- 1. In a typewriting machine, the combination, of a series of key-o erated rock shaft-s, extendin from front to ack of the machine,

stepped earings for the rear ends of said i ran roe shafts, arms projecting from said rock shafts near their rear ends, links connected i said links, those links that are connected with the lower ro k shafts standing hack of 'the ends of the upper rock shafts; of the series.

2. In a. typewriting machine, the combination of a series of keys, a series of rock shafts operated by said keys, :li'lliS prop-cling from said rock shafts near the l't'ill' ends thereof and bent hark so that the fre end uf each of said arms is bark of tin rear end of its rock shaft, links pivoted to said arms, and type bars operated by said links.

3. In a. typcwrit ing nun-lune, i.li(-.('O]'Hl)ll.n. t ion of a series of keys, :1 series of rock shafts o erated by said keys, n. frnine in which the rear ends of said rock shafts are jtnirnaled, arms projecting from said rock shafts and having their free ends standing back of said frame, links connected witlhsnid arms, and type bars operated by so id links.

4. In a typewriling i'nnrhine, the combination of a series of keys, 1- series of rock shafts operated by said keys. a frame n which the rear ends of said rock shafts n-e journaled, the bcnrin s for the lower rock shafts being nearer the lnack of the i'nnchine than those of the upper rock shafts, arms projecting from said rock shafts near the rear ends thereof, the free end of each of said arms; standing back of the end of its rock shaft, links connected with said arms, and type bars operated by said links. Y

5. In a typewriting machine, the combination of a series of keys, a seriesof horizontally disposed, key operated rock shafts, and a frame in which the rear ends of said rock shafts are-journaled, said frame comprising two bars or strips, and a series of cross pieces having bearings for said rock shafts, those bearings near the bottom of the frame being nearer the bark of the machine then those near the to of the framef 6. In a f iont strike typewriting machine, the combination of a series of type bars segmentally arranged below the printing ointin two sets, the type bars of one set liein shorter than those of the other, a series 0' keys, a series of key operated rock shafts, the keys near the front of the key board being connected with the lower rock shafts of the i series, and said lower rock shafts being con nected with the shorter type bars, and the keys near the back of the keyboard bein connected with the upper rock shafts, and said upper rock shafts being connected with the longer type bars. y

7. In a front strike typewriting machine,

the combination of two segments, one of bars pivo tally mounted on said segment-s, t-

t pe bars on one segment alternating with those on the other; a series of rock shafts ared in horizontal tiers and each rock I sha t having an arm; links, each connect-ed l at one end to a type but and at the other end shorter and the other of longer radius; type too to one of said ei'ms; enu x'eys for operating de a, and State of New York this 10th day said rock shafts, the rock shafts of the upper 01 sy A. D. 1905. tiers being connected with the t bars on ALEXANDER T. BROWN.

the segment of greater radius an the rock v JOHN H. BARR. 5 shafts of the lower tiers being connected with Witnesses:

the type bars on the segment of less' radius. E. E. CORY,

Signed at Syracuse, 1n the county of Chem A. L.' HINMAN.

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