US1451203A - Typewriting machine - Google Patents

Description

Apr. 10, 1923.

C. U. CARPENTER TYPEWRITING MACHINE Filed, May 5,

1922 .3 sheets-sheet l f/vmewron Apr. 10, 123. 1,451,203

I c. u. CARPENTER v TYPEWRITING MACHI TNE Filed May 3, 1922 5 sheets-sheer,- 2

Apr. 10, 1923.

C. U. CARPENTER TYPEWRITING MACHINE 5 sheets-sheet 5 P1 led May 5 Patented Apn. 10, 1923.

CHARLES U. CARPENTER, OF DAYTON,-OHIO.

TYPEWRITING MACHINE.

Application filed May 3, 1922. Serial No. 558,052.

To all whom it may concern.

Be it known that I, CHARLES U. CAnPnN- TEE, a citizen of the United States, residing at Dayton, in the county of Montgomery and ing ineans and the type-bars, and has for itsobject the provision of novel arrangements of type-bars and operating means for the same, whereby simplicity and ease of operation is obtained, and compactness is assured, for providing a typewriter of low structure and short depth from front torear, and wherein extreme visibility of the writing is obtained.

It is the object of my invention, further, to in novel manner provide type-levers having low 'p'ivots and key-levers for operating the same having pivotsin advance of the pivots of the type-levers; further, to provide key-levers located wholly in advance of the pivots for the type-levers; further, to arrange the pivots of the collective type-levers on an arc,arranged with an upward and rearward inclination, and, further, with such arrangement, to provide resting means for the type-ends of the type-levers arranged on substantially an arc of less curvature 'in a substantially horizontal plane, whereby a low structure and a compact arrangement are obtained. D

It is the object of my invention, further, to arrange the key-levers into a plurality of series each of which comprises a number of key-levers, and to provide coincident pivotal axes for the key-levers of each series; and, further, to vary the lengths of the workarms of the key-levers to equalize the strokes of their power or key ends.

It is the object of my invention, further, to provide novel pivoting arrangement for the type-levers whereby the types print upon an upper sector of the platen; further, to provide a type-lever and a key-lever and link for operating the same, the pivot of the typelever being lower than the pivot of the keylever in novel manner; further, to provide a curved type-bar, and a key-lever for operating the same the pivoting means for which latter extends within the concavity of the curvature; further, to provide novel pivoted type-bars, and key-levers .for operating the same having pivoting means adjacent to the type-ends 'of the type-bars when in re-' tracted positions.

It is the object-of my invention, further, to arrange the key-levers with their keys in a plurality of banks, exemplified as four banks, and pivoting means for the key-levers located between the key-ends of the keylevers and the type-levers; further, to provide spaced-apart pivoting means for keylevers ofdifi'erentbanlcs, andltype-barsawhose typeeends are normally located between the pivoting means of the respective banks; and, further, to provide novel means whereby the type-end of the type-bar has a long sweep of movement imparted thereto by novel means, whereby accelerating motion is imparted to the type-end of the type-bar for latter: K

Fig. l is a plan view of so much of a typewriting machine as is necessary to illustrate my invention.

Fig. 2 is a central vertical cross-section of,

the same, the section being taken on a line corresponding to the line 2-2 of Fig. 1, and parts of the operating mechanism being broken away, the key-lever of the lower bank of keys and the type-bar with which the same connects being shown in retracted position in full lines and in operated position in dotted lines.

Fig. 3 is a similar view showing the keylever of the second bank of keys and the type-bar with which it connects in retracted position in full lines and in operated posicausing the striking of the type with a sharp length and fi i to.

Fig. 7 is a vertical cross-section of the same, taken on the line 77 of Fig. 1; and

Fig. 8 is a cross-sectional detail of the pivoting means for the type-levers, taken on the line 8-8 of Fig. 7.

The frame of the machine is indicated at 11, and may be of suitable construction to support the operating parts, whichpit will be noted, are all located in compact'arrangement so as to provide a low machine which will occupy little space, the parts being also arranged as to be extremely compact from front to rear so that the dimensions of the machine shall be small in all directions for providing extreme compactness and portability of the ,machine.

Type-bars 12 are provided, shown as levers, several of which are shown. These type-bars operate in slots 13 of a support 14 in the frame, and swing on pivots, re-

ceived through the pivot-ends of the type bars, and located in wings 16, formed by said slots. The pivot-ends of said type-bars are shown formed as discs 17, guided by the walls of said slot-s, for insuring accurao in the movements of the type-bars.-

The support 14 is shown as an arc-piece at the bottom of the frame and provides meansfor pivoting the type-levers at the bottom of the machine. It is exemplified secured by means of screws 18 to anupwardly and rearwardly slanting plate 19 which is in turn secured to the sides of the main frame. The wings 16 extend at an acute angle from the horizontal plane of the bottom of the frame for ease and range .of movement ofthe type-levers. The arcpiece has a rearward and upward inclination for so relatively placing the middle typelevers and the end type-levers that directness of stroke is obtained. The type-levers are shown pivoted on a pivot-rod 21, of bow-form, located in a i'ecess 22 in the arcpiece. The ends of the pivot-rod are threaded and nuts 23 received thereover for drawing the pivot-rod in the direction of its rmly seating the pivot-rod in its arc-recess.

The constructions and arrangements of the parts permit the arc-support to be placed in the lowermost part of the machine without working parts therebelow. The working parts which extend from front to rear may be located at the sides of the arc-support, exemplified by the location of the links for shifting the carriage hereinafter referred It will be noted that the key-levers are located wholly in front of the arc-piece, providing a machine which is short and compact from front to rear.

Each of the type-bars has suitable types 25, 26, thereon, shown located on a head 27, suitably fixed to the swinging end of the type-bar. The type-ends of the type-bars normally rest in retracted positions on a menace pad 28, located on a shelf, 29, suitably secured in the frame.

The shelf 29 is shown arranged on a substantial arc of less curvature than the curvature of the arc-piece 14. The shelf is also preferably located in a. substantially horizontal plane. This permits all of the typeends of the type-levers to lie low in retracted positions, and results in a low structure of typewriting machine. The shank 35 of the type-bar is shown curved upwardly when in retracted position, for providing a space in the concavity of the curvature in which pivoting means for key-levers may be located. The curved form of the type-bars enables additional compactness of arrangement to be obtained, and aids in presenting the type for easy access by the operator when in retracted position, as for cleaning and inspection, and for the striking the type upon the paper, which is received about the platencylinder 37, preferably at a point above the horizontal plane in which the axis of rotation of said cylinder is located, whereby extrerne visibility of the writing is obtained.

The paper being typewritten is arranged to be received about the platen and to be held thereagainst by paper guides 38 of suitable construction, to cause contact between the paper and the cylinder upon the upwardly and rearwardlyextending sector 39 of said cylinder,.along which the writing takes place to present the writing upwardly and forwardly for ready view by the operator.

The platen is arranged to be raised and lowered by suitable mechanism and to travel crosswise of the type in any ordinary manner.

The raising and lowering means is exemplified as comprising bell-crank levers 41, 42, pivoted to the main frame at the rear of the latter, shifting levers 4:3, 14:, pivoted to the front part of the main frame, and links 45, 46, articulated to said respective levers by rear articulations a? and front articulations 48, the links passing the arc-suport for the type-levers at the sides of the atter,

Key-levers are provided for operating the type-bars, the key-levers being exemplified as wholly in advance of the type-bars. These key-levers are preferably arranged in a plurality of banks, exemplified as four banks 51, 52, 53, 54, of keys. Thekey-board may represent a standard key-board. The key-levers of the respective banks are shown at 56, 57, 58, 59. The key-levers are preferably arranged into a plurality'of series or sets, each series or set comprising a plurality of key-levers having coincident axes.

I shall first describe the operative connections of the key- levers 58, 59, (see Figs. 4 and 5), and shall then describe the operating'connections of the key- levers 56, 57, (see Figs. 2 and 3), whose pivoting means are air difierentl'y located forwardly of the pivoting means of the key- levers 58, 59. If desired, the key-levers may have their pivotal axes coincident, or otherwise arranged within the scope ofthe appended claims.

The type-levers are pivoted adjacent to the bottom of the frame, and the key-levers are preferably pivoted above the-pivots of the type-levers, for providing ease of operation and wide range of movement of the typeends of the type-levers by simple mechanism.

The key- levers 58, 59, are shown of bellcrank form, respectively pivoted in their angles by ivot-bearings and 61 about a pivot-r0 62, suitably supported in the frame of the machine. These pivot-bearings and the pivot-rod are shown located below the type-ends of the type-bars, and as extending within the concavity of the curved shanks of the type-bars when in retracted positions.

The key- levers 58, 59, comprise key-arms 64,

65,- which extend forwardly, and on the forward ends of which the keys 53, 54, are respectively located, the said key-levers also having arms 66, 67, which extendv downwardly and with Whichlinks68, 69,"are respectively articulated at 71, 72, the rear ends Figs. 4 and 5, it will be noted that the powerarm of the key-lever 58 is longer than the power-arm of the key-lever 59, the work-arm of the key lever 58 being also longer than the work-arm of the key-lever 59, in order to equalize the power required to operate the res ective levers.

\eferring to Figs. 4 and 5, when the keys of the respective key- levers 58, 59 are struck,

the said key-levers and links, and thetypebars connected therewith, move from the positions shown re pectively in Figs. 4 and15 in full lines, to the positions shown in said figures in dotted lines, these movements being accelerating movements during their progress, and the movements being accomplished easily by striking pressure "of the.

fingers, for the reason that the articulations 73, 74, between the links'and the type-bars move through their arcs of movements with the least resistance with relation to the power applied, thelatter part of these movements being aided by the gravity of the descending type-lever, the result being quick, sharp blows by the type upon the paper be;

ing printed, for producing well-defined impressions and capacity for a maximum number of carbon copies. a

The pivot-shaft or rod '62 for the key- levers 58, 59, is located in rear of the typeends of the type-bars and lower than said typesends, whereby compactness is produced.

The key-levers56, 57, (see Figs. 2 and 3), may, if desired, have their pivots upon the 'pivot-rod'62. I have, however, shown the same pivoted on a pivot-rod 81, suitably supported by the frame of the machine, and

located in close adjacency to the type-ends of the type-burs, and preferably nearer the keys than the pivot-rod 62, so as to reduce the lengths of the power ends of said levers,

thereby aiding in equalizing the strokes upon the keys of all the banks of keys. Equalizing said strokes is also accomplished by varying the lengths of the rear arms of the key-levers 56, 57 I i The key- levers 56, 57, preferably respechave articulations 86, 87,-with links 88, 89.

which in turn have articulations 90, 91, with the type-bars. Springs 92, 93, between the arms-84, 85, and the frame, normally retract the key- levers 56, 57 and the type-bars having operative connection therewith.

57, and arranging the key-levers in a nonmterferlng relation, I'prefer to merge the respective arms thereof into upwardly extending arms 94, 95, the upper ends of which have bearings 96, 97, about the pivot rod 81.

The arrangement of these key- levers 56, 57, and their links and connections with the type-bars, are, as in the case of the keylevers, 58,59, such asto cause an accelerating movement of thetype-bars in manner hereinbelore explained, aided by gravity, for efi'ectingsharp blows of thetype upon thepaper to produce well-defined impressions and capacity for a number of clear carbon copies. 1 v

The keyearms of the key-levers may be received through suitable slots 98 in a front plate or comb 99 in the frame. Placing the key-levers on a plurality of rods orshaftS enables wide pivot-bearings to be provided for said levers, to prevent lateral movements of said levers and to maintain said levers in their proper paths of movement. The pivotbea-rings of the key-levers on each of said shafts are in the planes of the key-levers on the other of said shafts.

My improved construction and arrangement of parts provide-s low visibility of the printing lines presented in an upward forward direction for ready vie-wing by the operator. The type-bars are provided w1th curved shanks for aiding in compactness of arrangement; the key-levers and the opera.- tiveconnec'tions between the'same and'the type-bars are located in front of the typebars and below the upper ends thereof, and

For aiding in the pivoting of said key-levers 56,

my improved construction enables short keylevers to be employed, producing com pactness of parts, quick blows of the typebars, and permitting rapid operation of the machine.

My improved construction and arrangement further provides means whereby'a wide range of movement is imparted to the typeend of the type-bar with a minimum movement of the key, due to the novel mounting of the key-lever and its connection with the type-bar. My improved construction further enables the operating parts to be lo-' cated in close relation 'to produce a typewriter which is light in weight, and small and compact, and is especially adapted as a so-called portable typewriter.

It will be noted further that the pivot of the key-lever is adjacent to the type-end of the type-bar, and that the reararm of' the key-lever, -the link and the type-bar have the general form of a triangle when in retracted position, this arrangement produc-' ing ease of operation; i

Having thus fully described my invention, what I claim as new and desire to secure by Letters Patent, is:

1. In a typewriting machine, a key lever pivoted approximately at the top of the maa segmental pivot for the type bars near the bottom of the machine, said type bars extending upwardly to approximately the top of the machine, and links connecting the ends of the key levers with the type bars.

3. In a typewriting machine, a key-lever having an inwardly and upwardly extending portion, a vertical portion terminating in an eye, and a downwardly projecting portion connected to the base of the vertical portion, a type bar, and means for connecting the lower end of the downwardly projecting portion of the key lever adjacent the bottom of the machine with the base of the type-bar, said type-bar being pivotednear the bottom of the machine and extending upwardly to near its top.

4. In a typewriting machine, a key-lever extending inwardly to a pivot, a pivot, a portion of the key lever extending inwardly and downwardly from said pivot, a typebar pivoted near the base of the machine and having a plurality of types thereon, a link at the lower end of the last mentioned por- 7 tion of the key lever directly connecting said key-lever to the type-bar, said type-bar extending to near the top of the machine, being adapted to move through an arc to engage with a platen, a platen, and means to move said platen vertically.

5. In a typewriting machine, a bankv of key-levers each consisting f a substantially horizontal portion and a siilostantially vertical portion, each of said levers being pivoted at the point of juncture of the two portions, the last mentioned portion having its free end adjacent thebottom of the machine, a single link for each lever connected directly thereto and to a type bar and lying in a substantially horizontal position ad acent the bottom of the machine, and a bank of typelevers having their lower ends pivoted on a segment adjacent the bottom of the machine.

6. In a itypewriting machine, a frame, a plurality of type-bars and angled key-levers arranged in banks, a portion of each key lever extending to the lower portion of the machine the type bars beingwpivoted in a semi-circular supporting segment located adj aoen-t the bottom of said frame, said typebars being at an angle to the bottom of the machineof about 45 when at rest, the lower ends of said key leve'rs being approximately at the same elevation as the pivoted ends of the type bars. r

7. In a typ'ewriting machine, a frame, a plurality of type bars having a plurality of types thereon and angled key-levers 'arranged in banks, a portion of each key lever extending to the lower portion of the machine and being connected to a type-bar, said type bars being pivoted in a semi-circular supporting member also located adjacent the bottom of said frame, said type-bars beingat an angle to the bottom of the machine of about 45 when .at rest, the lower ends of said key-levers being approximately at the same elevation as the pivoted ends of the type bars, a platen, means for elevating vertically said platen adapted to pass beneath said semi-circular supporting means and between it and the frame of the machine to a point adjacent the banks of keys.

8. In combination in a typewriting machine, a frame, a plurality of key-levers each of which consists of inwardly and downwardly extending portions pivoted at the junction of the two portions, rearwardly extending links connected to each of said lower ends of the downwardly extending portions of the key-levers and also connected to their respective type-bars, a semi-circular means located adjacent the bottom of said frame and a plurality of type-bars piva respective type-bars, asemi-circular means bars on the segmental member.

and a-plurality of type-bars pivoted therein having their free ends adapted to move through an arc and a platen for engaging the flee ends of said type-bar, said frame being so arranged that it protects and extends above the free ends of the type bars in their position of rest.

10. In combination in a typewriting machine, a frame, a plurality of key-levers each of which consists of inwardly and downwardly extending portions pivoted at the junction of the two portions, rearwardly ex tending links connected to each of said lower ends of the downwardly extending portions of the key-levers and also connected to their located adjacent the bottom of said frame and a plurality of type-bars pivoted therein having their free ends adapted to move through an arc and a platen for engagingthe free ends of said type-bar, and means extending from a point adjacent the outer ends of the key-levers to said platen for controlling its elevation.

11. In a typewriting machine, a combination of a frame, a plurality of keys in a series of banks, each key having a lever extending inwardly to a pivot and another portion of the lever extending downwardly therefrom towards and adjacent to the bottom of the frame, a link connected to each key-bar extending rearwardly approximately in the horizontal at an angle to its type-bar to which it is connected, and a plurality of type-bars having their lower ends pivoted in a semi-circular supporting member adjacent the bottom of the machine and a platen cooperating with the type levers.

12. In combination in a typewriting ma chine of a frame, means to support a plurality of key-levers arranged in banks, each of said levers extending substantially inwardly and downwardly, type bars pivoted on a segmental member, the lower' ends of some of said levers being located below the pivotal point of connection of the type-bars, and links connected to each key-bar at one end and at the other end to a point above the pivotal point of connection of the type- 13. In combination in a typewriting machine of a frame, means to support a plus rality of key-levers arranged in banks, each of said levers extending substantially inwardly and downwardly, type bars pivoted on a segmental member, the lower ends of some of said levers being located below the pivotal point of connection of the type-bars, and links connected to each key-bar at one end and at theother end to a point above the pivotal point of connection of a type-bar on the segmental member, aplaten, and means extending from a point adj acent'the keys to the platen for varying its elevation.

14:. In a typewriting machine, a frame,-

key levers therein, means at the top of the frame to suspend the key levers pivotally,

type bars, means adjacent the bottom of the machine to directly connect the inner ends of type-bars and key-levers, said connecting means being at an angle to the type-bars and key-levers when at rest, and segmental means to pivotally support the type-bars adjacent the bottom. of the machine while the free ends thereof when at rest are located adjacent the key-bar suspending means.

. 15. In a typewriting machine, a frame, key levers therein, means'at the top of the frame to suspend the key levers pivotally, type bars, means adjacent the bottom of the machine to directly ,connect the inner ends of substantially the same distance from the central type-bar pivots-as the key-bar pivots are removed from the central type-bar pivots.

-16. In a typewriting machine, a frame, a pair of spaced transverse shafts near the top and the front of the machine, a plurality .of key-levers suspended therefrom,

one series of said key-levers extending inwardly'and downwardly having vertical portions supporting them pivotally on one of the shafts, the other series of key-levers consisting of inwardly and downwardly directed portions and pivotedon their shafts at the point of junction of the two portions.

17. In a typewriting machine, a frame, a pair of spaced transverse shafts near the top and the front of the machine, a plurality of 1 key-levers suspended therefrom, one series of said key-levers extending inwardly and downwardly having vertical portions supporting them pivotally on one of the shafts, the other series of key-levers consisting of an inwardly and downwardly directed portion and pivoted on their shafts at the point of junction of the two portions, a semicircular type-bar supporting element located at an angle to the vertical and-inclined rearwardly and having pivotally mounted thereon a plurality of type-bars,

the pivotal points thereof being adjacent the bottom of the frame, said type-bars when at rest being inclined towards the forward portion of the machine at an angle to the vertical with the free ends thereof adja cent to the suspendingshafts for the key- 'levers, a plurality of links respectively connecting the lowerends of the key-levers to the type-bars, the point of connection of said links to the type bars being above the pivotal point of connection of the type-bars onthe semi-circular supporting member, and

a platen on the rear of the frame so arranged that the type face of'the type-bars engage with the platen above its axis.

18. In a typewriting machine, a frame, a

I pair of spaced transverse shafts near the top and the front of the machine, a plurality of key-levers suspended therefrom, one series of said key-levers extending inwardly and downwardly having vertical portions supporting them 'pivotally on one of the shafts, the other series of key-levers consisting of an inwardly and downwardly directed ortion being pivoted on their shafts at the point of junction of the two portions, a

ing shafts for the key-levers, a plurality of links respectively connecting the lower ends of the key-levers to the type-bars, the point of connection of said links to the type-bars being above the pivotal point of connection of the type-bars on the"semi-circular supporting member, a platen on the rear of the frame so arranged that the'type-ends of the type-bars engage with' the platen aboveiits axis, means extending from the front of the machine to theplatenfor changing the elevation'ofithe platen and means on the ends 'of the type-bars vfor mounting different type above the other for engagement with the platen. depending upon the height thereof.

19. In a typewriting machine, the combination of a curved type-bar and a key-lever having a pivot-bearing extending intothc concavity of said curved type-bar when said type-bar is in retracted position.

20. In a typewriting machine, the combination of pivoted type-bars having rocking type-ends, and a pluralityof key-levers arranged into a plurality of banks having spaced-apart pivots, the type-ends of said type-bars normally located in the space between said last-named pivots.

In testimony whereof, I have hereunto signed my name in the presence of two subscribing Witnesses.

CHARLES U. CARPENTER.

In presence of J. A. DAnswnLL, FLOYD A, Woons.

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