US937412A - Type-writing machine. - Google Patents

Description

A. T BRGWN.

TYPE WRITING MACHINE.

APPLICATION FILED JUNE 4, 1904.

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A'PPLIOATION FILED mm; 4, 1904. A 93? A3@ Patented Oct. 19, 1909.

2 SHEETS-BHEBT 2.

' some omitted. Fig. 4 is a plan view o t the riage 8, upon which is mounted a roller" fully set forth herein and t ed out in the claims.

My invention is illustrated. in the accom rrED STATES PATENT oFFio ALEXANDER T.'BROWN, OF SYRACUSE, NEW YORK.

TYPE-WRITING MACHINE.

semis.

Specification of Letters Patent.

Application filed June 4, 1904. Serial No. 211,128.

State of New York, have invented certain new and useful Improvements in Type- Writing Machines, of which the following is a specification.

'My invention relates to typewritlng machines and it consists of certain combinations and featurescf construction which will be particularly pointpanying drawings in which Figure 1 is a central vertical section. Fig. 2 is an enlarged plan view showing the-escapern'ent rocker and escapement wheel and parts associated therewith, Fig. 3 is a rear elevation with some parts broken away and line locking mechanism and the rack biir that supports the margin stops. I

The main frame of my typewriter re prises-a base portionhaving side plates 1, a backplate 2, a shelf 3, posts it-rising from said base portion and a top plate 5 sup-ported by said posts. A rail 6, mounted upon the topplate't'i, has inits front and rear edges race ways for anti-friction balls or rollers 7 by which said rail supports the carplaten 9. A rack bar 10 is fixed to the underside of the carriage 8 and meshes with a gear wheel 11 which is mounted on a shaft 12 beneath the top plate and extends upward through a. slot in said top plate and inthe rail 6. The gear wheel 11 has fixed to one sidethereof a spring drum 13 which drives the carriage. The shaft 12 is mounted in two plates 11 and 15 which are fixed to the shelf 3 by screws 16 threaded into lugs 17 rising from said shelf. A shaft 18. .l*ig. 3)

journaled in the plates 14 and 15, has fixed thereon a. pinion 19 which meshes with the gear wheel ll and also a gear '20 which meshes with a pinion 21 on a shaft 22 which is also jonrnaled in the plates 14 and 15.

- The shaft 22 extends through the plate 14- and has fixed on its forwardend an escapement wheel 23. Any suitable ratchctdevice may be interposed in'this train of gearing to afiorda return motion to the carriage. In the present instance, the escapement wheel -is shown with two teeth 24, which project from the front face of the escapenient wheel in ,a direction substantially parallol tothe axis of the shaft 22, and these.

teeth cooperate with a fixed dog'25-"and; a loose dog 26 mounted on an arm'27 projectingfrom the rock shaft 28, which is journaled on pivot screws 29 threaded through brackets 30 fixed to and projecting from the front face of the plate l-l. The rock shaft 28stands in front of the front face of the escapelnent wheel 23 and the feed dogs more to and fro in a direction which is substantially toward and from the axis of the shaft 22.

The fixed dog'25 consists of a plate of metal secured to the arm 2-? by a screw 31 and the loose dog is pivoted to saidarni 27 at 32 and has a backwardly extending tail 33. the motion of which is limited in one direction bythe arm 27 an-d -in the other by :the head of a scre\ r 345 which is threaded;

28 is locked so that the loose dog passes between the teeth 24 and the hub of the es capement wheel, said loose dog is moved .un-

. Patented Oct. 19, 1909 til the tail 33 thereof is arrested bythe I screw 34 by any suitable spring, such, for example, as a coiled spring seated beneath ,thatail 33 in a recess in the arm 27 An arm 35 extending from the rock shaft 28 toward the front of the machine, has a screw -3(S...t-hreaded throughuts forward end and securcd in adjusted position by a/ lock nut 37. One of the brackets 30 is formed with'an car 38 lying beneath the arm 35 and having threaded ,therethrough a sen-u 3.)

which maybe adjusted up and dowuand" locked in adjusted position by a lock nut 40.

The upper end of the screw 39 serves as an adjustable stop to arrestthe return motion of the arm 35, and said arm is normally pressed into engagement.with said screw by a spring 41 coiled about the rock shaft 28 and pressing at one end against the arm 27 and at the other against one of the brackets 30.

The keyboard mechanism is mounted in a 0 secondary frame which is dctachably mounted. 111 the main frame of the machine. Said detachable secondary frame comprises a sewashers 44 .in position, the whole thus conlie stituting a rigid framework. Furcated key levers 45 are mounted on sleeves which are strung on rods 46 extending through the series of plates 42. These key levers are arranged in straight rows from front to back of the machine, and a plate 42 extends between each contiguous'pair-of rows of key levers. These key levers 45 are formed of sheet metal bent into a U-shaped form at 47, thus forming furcated levers, the front ends of which are comparatively close together and embrace bars 48 into which project the stems 49 of the keys 50. At their rear ends the furcated levers 45 are spread farther apart so that when a key is de ressed the front end of its lever 45 may escend between the arms of the furcated key lever next in front of it. The stems 49 are guided in openings in frame plates 51 beneath which washers 52 of felt or other sound deadening material are secured to the rods 48. Each of the levers 45 is rigidly secured to a sleeve which is loosely mounted on a rod 46 and each of these sleeves has fixed thereto a lever arm 53 to the upper end of which is pivoted a parallel moving link which transmits the motion of the key to the type bar.

The keyboard system so far described is substantially identical with that shown and described in my prior application, Serial No. 127,536, filed October 16, 1902, typewriting machines, to which a plication re erence is made fora fuller disc osure of this construction.

A series of secondary levers 54 are pivoted at on a bar 56 which extends transversely.

of the machine. Two or more of the plates 42 are extended toward the back of the machine and support the bar 56 which is secured thereto by screws 57, as shown in Fig. 1. The lever arms 54 are connected to the lever arms 53 by links 58, each of which is pivoted at its front end to one of the lever arms 53 and at its rear end to one of thelever arms 54. I prefer to make the arms 53 and 54 of the same length and'to so design the parts that these twoarms are parallel. This bein the case, each of the links 58 has a paralle motion, that is to say, when a key is de pressed every point of the link 58 connected thereto moves parallel to every other point. Each of the levers '54 extends downward from its pivot, beneath which it is formed with a hook 59 to which is connected one end of a spring 60, the other end. of which is connected to one of a series of hooks 61 formed by bending back the teeth of a comb into a bracket 71, depending from thr lop plate 5. The bar 67 has projecting there from a lug or bracket 72 which, when the universal bar is operated, strikes the adjust able screw 36 and rocks the rocker frame on which the feed dogs are mounted. The pic cise point in the depression of akey at which the bracket 72 engages the screw 36 and the precise extent of motion nnpartcd to the IE3 rocker frame by the operation of the key, may be regulated by ad3usting the screws 31'; and 39. I contemplate some such :uljus'tment of these parts as is shown in Fig. l, Where it will be seen that there is a cou.-;id-

erable amount of lost motion between the bracket 72 and the screw 36 and that the screw 39 is so adjusted that a slight motion of the rocker franc will permit the loose (lo 26 to escape from the tooth 24 of the est ment wheel. The parts being thus mljuslri'l, but little work is involved in rocking the -rocker frame and this work dots not begin until the other key operated parts have acquired considerable momentum.

The type bars 73 are mounted upon a rod 74 by a ball caring connection. The rod 74 is bent into the segment of a circle and has grooves or ball races cut in its surface.

The type bar, at the point where it surrounds the rod, is made of two pieces, a semi-circular strap 75 being secured to the bar by screws 76, thus forming 'a circular opening or eye which is grooved internally to form a ball race cooperating with that formed in the rod 74. Two types 77 and 78 are mounted on each type bar, and the segment 74 is sliiftable up and down to bring one or an- ;other of said'typcs to the printing point.

The preciseconstruction of type bar segments andball bearings here shown is immaterial to the present invention, but are described and claimed in other applications of mine copending herewith.

Each of the parallel moving links 58 has an upwardly extending arm 79 which is pivoted at 80 to a link 81 which is pivoted at 82 to a. ty e bar 73. The link 81 consists of a strip 0 resilient sheet metal which is bent in the manner shown in Fig. 1 and has ears 83 bent back from its edges and embracing a portion of the type bar 73 to which said ears are pivoted at 82. At its forward end the link 81 is formed with a pair of cars 84 which are bent back as shown and pivoted to the'arm 79 at 80. The form of the link 81 is such that said link constitutes in effect a spring connection between the arms 79 and the type bar. I have found that this form of connection greatly improves the those type bars which are nearthe end of the segment lying at a greater distance above the links 58 than those near the center of the segment and also lymg 111 different planes at different inclinations to the vertical. The arms 79 which are connected to those type bars near the ends of the segment are accordingly made longer and at their upper, ends are bent into the plane of their respective type bars. By an inspection of Fig. 1 it will be seen that the forwardly extending portion of the links are all alike except as to length. In practice, there fore, when these links are made, they are all blanked out alike, each one having its arm. 79 of sutlicient length to reach the highest type bar of the segment and each having its forwardly extending arm-0f sutlicient length to reach the key lever of the front row. Each of these blanks then has its forwardly extending arm cut off to the proper length.

and bent back upon itselfas shown'at-85 so that the lever arm 53 is pivoted between the forwardly extendingarm of the link 58 andthe backwardly bent end of that arm. At its. rear end eaeh of the levers 58 is bent back upon itself as shown at 86 and the lever arm 54 is pivoted between the link and the bent back portion thereof. Each of the arms 79 is cut oil, if mscessary, to a length appropriate to the height of the particular type bar towhieh it is to be connected. The construction of the keyboard mechanism is such that the levers 45 and 53, the'bell crank levers 54 (33. the links 58 and s )rilws (30 are all assembled outside of the machine in-the detachable frame which has been described,

and this part of the mechanism isinserted in the machine-as an entirety.

The reciproeatory bar 97 has an arm. 87

at its upper end (I igsd'idid 4) and to this arm the stem 88 of a ribbon guide 89 1s secured at 90. The ribbon guide 89 'normally' .lioldsjtheiibbon a. little below the printing #pointibut raises it to cover the printing point whe i the arm 7 riseswiththe universal bar The stem 88 of the ribbon guide passes high an opening in the top plate 5 by which opening said stem is guided in its up and down motion. i l I My line lockmechanism cooperates with the reciprocatory bar 67.- A slide bar -91 (Figs. 1 and 4) is mounted at its forward end upon the screw which extends through an elongated slot 92 formed in said bar. At its rear end the bar 91 slides in a .slot cut in the rear flange of the top plate as'shown at 93. A light spring 94 connected at 0ne.end to the bar 91 and at the other to the bracket 71, tends to draw said bar toward the front of the machine. The bar 91' is formed with a flange 95 which normally stands in the position shown in Fig. 1 with its forward edge just out of the path of tlie bar 67; but when the bar 91 is drawn forward. by the. spring 94 the flange 95 passes above the upper end ofthc bar (57 and locks the same against operation. The flange 95 is made with its stop or locking face oblique to the path of motion of the bar 91 so that if the operator is striking the keys in rapid succession at the moment when the bar 91 is moved forward by its spring 94, said flange may happen to catch thebar 67 at about the middle of its upward motion; If so, when the hart)? returns to its lower position, the flange 95'will follow it up in such return motion and lock the bar (37 in its extreme return position against any further actuation of a key. \Vhcn the machine is It will be perceived that the be arranged in such a position that it would i not arrest the bar (37 in its extreme, retin'n position, or else the stop might not snap over the top of the bar 67 at all when the machine is being operated very; rapidly. By the present arrangement the bar (i7 will be arrested even though one key be'depressed before another has entirely.returned to normal position, and every downward motion of said bar will be followed up by the stopv 95 and the bar 67 will be locked inits extreme return position.

- The bar 91 is normally held in its rear position shown in Fig. 1 by a lever 96 which is pivoted on a screw 97' on the top of the top plate of the machine. An arm 9S of the lever 96. is bent downward through an opening 99 in the top plate 5 and thence extends into a slot 100 in the bar 9.1 as shown in 1 Fig. 1. The lever 96 is pressed in a d iree-' tion to move the bar 91 toward the back of the machine by a spring 101 which is coiledabont the screw 97. and'which, at one end. engages the lever 97 and at the other is se cared to the top plate 5. The lever 96 has an arm 102 (Fig. 4) from which rises a ver-- ticai'ly disposed piece 102. which is formed with a cam portion 104 which lies in the path "ofa line stop 105. which projects from tail fashion, and said bar is formed with a series of slots or notches which are engaged -by pivoted latches 111 to hold the stops in any position along the bar to which they may be adjusted. When the line stop 105 engages the cam 104: which is mounted on the lever 96, said cam is moved toward the back of the machine and the arm 98 is thus moved toward the front of the machine, leaving the bar 911ree to move forward under the impulse of its spring. 94- in the manner which has been described. It will, of course, be understood that the spring 101 is stronger than the spring 94.

If it is desired to write a few letters after the line lock has been'operated, said line lock may be released by the following means The bar 107 is prolonged at one end by a projection 112beneath which lies the rear end of a lever 113 which is pivoted at114= to the carriage and which extends to the front of the. carriage, where itis formed with a finger piece. By depressin this finger piece the arm 10'? may be rocked about its pivots 109, thus raising the stop 105 above the cam 104. The lever 96 will then be moved toward the back of the machine by its spring 101, withdrawing the stop 95 'from over the bar 67. If the stop 105 be thus permitted to pass a few letter spaces beyond the cam 101 it will encounter a stop 115 which projects forward from an arm 116 which is pivoted in ears 117 projecting from the main frame. The arm 116 is pressed toward the; front of the machine by a sprin 118 so. that the stop 115 normally lies in tie path of the line stop 105 and. the margin stop 110; but it may be moved liack out of the path of these stops by rocking the armj116'about its pivot. Each of the stops .Seri-al No. 211,02o, filed June 105 and 110 is formed with a cam portion 119 so that if either of said stops be moved past the stop 115 for the purpose of writing in the margin, then, when the carriage isv returned, these cam portions 119 engaging the stop 115, move said stop backward out of the way and permit the carriage to pass freely;

The'carriage and carriage mounting forth in this case, are not claimed l erein, but are claimed in my pending application, 29th, 1901,

The carriage feed mechanism and the type and key action herein set forth are not claimed in this application but are respectively claimed in divisional applications Serial. No. 212,197, filed August 1st, 1905, and

Serial No. 229,486, filed October 21st, 1904:. Said type and key action is also claimed more broadly in my pending application, Serial No. 127,536, filed October 10th, 1902.

Various changes may be made in the details of construction and arrangement without departing from my invention.

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

1. In a typewriting machine, the c0mbination with a carriage and keycontrolled printing instrumentalities, of means for locking said printing instrumentalities out of operation at the end of a line, comprising two cooperating locking members, one of said members being operable by the keys, one of said members having a motion into engagement with the other under the control of the carriage, and one of said members having its locking face oblique to the dircc tion of such motion.

2. In a typewriting machine, the combination of a carriage, a spring, two coiiperating locking members, one of which is moved by said spring under the control of the carriage into position to engage and lock the other, and one of which has its stop J1 locking surface oblique to the path of such motion.

3. In a typewriting machine, the combination of a series of keys; a universal bar; a locking member which moves. with said universal bar, and a locking member which 00- operates with the first mentioned lockin member to lock said universal bar, one 01' said members being movable into and out of position to engage the other, and one of said members having its stop or looking face oblique to thepath of such motion.

4. In a typewriting machine, the combination with the keys, a universal bar actuated thereby, and a carriage of a spring moved slide bar adapted to 100 said universal bar, and a sprin pressed lever holdin said slide bar out 0 working position an gloved by the carriage to release said slide 5.- In a typewriting machine, the combination with the keys, a universal bar actuated thereby, and a carriage, of a slide bar provided with an oblique stop or locking member co-acting with said universal bar and tending to move to locking position, and as ring moved lever normally holding said sli e bar out of working position and moved by the carriage to release said slide bar.

0. in a typewriting machine, the combination of the keys, a universal bar moved i 'ertically thereby, a link connected to said mniversal bar and guided on the frame, a spring pressed laterally movable rod or bar arranged, when moved from normal position, to arrest said .link and lock the type mechanisn'i, a spring actuated lever controlling the last named rod or bar, and a carriage actuating said lever at a determined point in the travel of the carriage.

7. In a typewriting machine, the combination of a carriage, a lever operated by said carriage and t'ulcrumed on the main frame on a. vertical axis, a sliding bar held in inoperative position by said lever, a spring for moving said bar endwise horizontally when said carriage operates said lover, a universal bar locked by said sliding bar, and type mechanism locked by said universal bar.

8. In a typewriting machine, the combination of a universal bar; a link connected with said universal bar to move therewith, a ribbon vitn-ator operated by said link; and a line lock cooperating with said link to lock saidlink and universal bar.

J. in a typewriting machine, the combination of a universal bar; a reciprocatory member conl'iected with said universal bar and -arrying a ribbon guide; and a line lock cooperating with said member.

it). In a typewriting machine, the combination or" a carriage; an escapement mechanism for controlling the feed of said carriage; a universal bar; a member connected with said universal bar to move therewith and having lost motion connection with said eseapcment mechanism; a ribbon vibrator operated by said member; and a line lock cooperating with said member.

1]. In a typewriting machine, the combination of a carriage; an escapementmechanism for controlling the feed of said carriage; a universal bar; a member connected with said universal bar to move therewith and having lost motion connection with said escapement mechanism; a ribbon vibrator carried by said member; and a line lock cooperating with said member.

12. In a typewriting machine, the combination of a carriage; a universal bar; a reciprocatory bar pivoted to said universal bar, said reciprocatory bar carrying a ribbon guide; and escapement mechanism operated by and having lost motion connection with said reciprocatory bar.

13. In a typewriting machine, the combination of a universal bar; a reciprocatory bar pivoted to said universal bar and carrying a ribbon guide; and an escapement mechanism comprising a rocker frame having a part in a position to be struck by said reciprocatory bar when the same is operated.

14. In a typevvriting machine, the combination of a carriage, a series of key-actuated devices, a universal bar for said key-actuated devices, a ribbon vibrating device connected with said universal bar, and a line leek device cooperating with said ribbon vibrating device.

15. In a typewriting machine, the combination, of a carriage, key actuated devices, a universal bar for said. key actuated devices, and a line lock device for locking said universalbar, said line lock device comprising means for first. arresting said universal bar when the latter is out of its normal position, and then following up said universal bar as it returns to normal position and locking it in normal position.

Signed at Syracuse, in the county of Onondaga and State of New Yorkthis first day of June A. D. 1904*.

ALEXAND Elll. BROWN.

I \Vitnesses:

H. A. Cannan'r, C. E. 'lom'nnvsox.

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