US1419182A - Typewriting machine - Google Patents

Description

41. WALDHEIM. TYPEWRITING MACHINE.` APPLICATION FILED APH. 20 I920.

LM 9, 182. Patented June 13, 1922.

3 SHEETS-SHEET I.

- 1. wALuHE-lM-.-

TYPEWRITING MACHINE.

APPLICATION FIITED APR. 20, 1'920.

Patented June 13, 1922.

3 SHEETS-#SHEET 2.

J. WALDHEINI.

T YPEWRITING MACHINE.

APPLICATION HLED APR.20.1920.

Patented June 13, 1922.

3 SHEETS-SHEET 3.

either on one side or the other side of the point of connection of the operating typekey connected thereto, whereby either the type-bar of one set or the type-bar of the other set will be operated. The position of the segment may be changed by a shift-key, to give the selection between the two sets rof type-bars.

For the selection of the types of the short type-bars, the type-heads thereon have a normalposition corresponding to the printing of one set of types thereon, and an abnormal posi-tion corresponding to the printing of the other set of` types; the abnormal position being determined by a rail which shifts each type-head as the type-bar moves up to print.

Platen-shifting mechanism is provided in combination with the long set of typeebars, which have their type-blocks rigidly secured thereto and set at various angles of the typebars as in the Underwood standard typewriter. The platen-shifting mechanism comprises a case-shift key which may be connected to operate the type-shifting mechanisin for causing the type-blocks of the short bars to be shifted radially. Either one of two sets of types may be selected by a styleshift or selecting key. Either one of the case-shifting mechanisms is connectible by the style-shift-key to the case-shift key. Thus, with this arrangement, there is provided a case-shift-key which may actuate either one of two case-shift-mechanisms, the

,effectiveness of the case-shift-key being under the control of the style-shift-key.

From the foregoing, it will be understood that the same keyboard may be rendered effective, by means of a key, to bring the types of either set to the printing point, andV that by suitable mechanism, operated by another key, the types in either set may be caused to print either upper-case or lower-case letters.

Other features and advantages will hereinafter appear.

In the accompanying drawings,

Figure 1 is a vertical section, taken from front to rear, with parts omitted. to simplify the showing` ln this view, the vmachine is in a condition to print small, vert-ical characters corresponding to a fulcruming of the upper ends of the floating levers, and thus the use of the long set of type-bars and the rear set of types thereon.

Figure 2 is a front view in elevation, partly broken away to show the underlying structure, and showing the fulcrum segments in their normal positions in which the long set of type-bars is effective.

Figure 3 is a detail view, in front elevation, of the fulcrum segments, showing them connected as a unit and in their shifted position; the style-shift-key is, therefore, in its depressed position.

Figure 4 is a horizontal view of part of y printing point.

one of the short type-bars,.with the typehead broken away to show the pivotal connection thereof to the type-bar and the means of yieldinglylocking the type-head in either of its adjusted positions.

Figure 5 is a view of the parts shown in Figure 4, exceptthat it is not broken away. rlhis view illustrates one of the type-bars off to one side. i

Considering more particularly the separate parts of the invention, character keys 1 depress key-levers 2 to rock same about an intermediate pivot 3. ltach key-lever is connected to rock a bell-crank 4, about a ful- Crum 4a intermediate the ends thereof, to swing a floating lever 5, pivoted at 5tL to the upper end of the bell-crank 4. These upper ends of the bellscranks 4 are bent so as to lie in radial planes which intersect at the This is done so thatthe floating levers may be radially disposed in substantially the same planes with the links 6 and 7 and type- bars 8 and 9, to which the links are connected. Thereare two sets of type- bars 8 and 9, the type-bars of one set being alternately placed between those of the other set, and both sets are supported on suitable segments 8a and 9, respectively, which may be of any well-known construction. When a typ`e-bar of either set is operated, it is swung up rearwardly to cause roman style of types, indicated generally` at 10, or italic style of types, indicated generally at 10a, depending upon the set to which the type-bar belongs, to strike the platen 11, which may be mounted to rotate on a carriage of any well-known character.

The sets of type- bars 8 and 9, as above stated, aie provided with different styles of types 10 (roman) and 10El (italic), respectively. 'lo selectively render either the roman types 10 or italic types 10a effective,

or, in other words, to determine which set of type- bars 8 and 9 shall be in use at any particular time, there is provided a styleshift-key 80, which, when depressed, rocks a shift-lever 81 about the pivot 3, so as to rock a bell-crank 15 (Figures 1 and 2), having a pin-and-slot connection 16 with a pair of fulcrum plates 17 and 18. The fulcruin plates 17 and 18 mayy be curved and are connectedby strips 19 to form a segment 20 to move so that the fulcrum plates 17 and 18 may move as a unit. The segment 20 is supported for easy movement by means of rollers 21 on a` suitable support. The rollers engage in grooves 21a, provided in the` segment. The segment 2O has a normal position, illustrated in Figure 2, and is moved against the tension of a springV 22, by the key 80, to the Figure 8 position. The limits of movement of the segment are determined by a pin 23,

which extends between two stops 24 and 24, i

ment. 1t should be understood that other means for limiting the movement of the segment 2O may be used.

The purpose of the plates 17 and 18 is to form alternative fulcrums for the lower and upper ends of the fioating levers 5. The alteration of the fulcrums is obtained by having the plates of the segment formed after the manner of combs with teeth or ridges 25 separated by slots 26. The ridges of the lower fulcrum plate 17 are radially opposite the slots of the upper fulcrum plate 18, and vice versa. The type-actions and thus the floating levers are radially disposed about a common center. This causes the plates 17 and 18 to either act as fulcrums for the lower ends of the lioating levers 5 or for the upper ends of the floating levers 5, according to the adjustment of the segment 20.

Normally, the roman types 10 are effective and the segment 2O is in the position of Figures 1 and 2, with the ridges or teeth of the upper plate 18 in register with the levers 5. Under these conditions, when one of the character keys 1 is depressed to rock the bell-crank 11, the bell-crank will tend to draw the associated floating lever 5 rearwardly. The upper end thereof, however, will be blocked against movement by one of the ridges or obstructions 25 and the lower end will enter one of the slots 26, thereby drawing on the link 6 and thus swinging a type-bar 8 up against the platen 11. The slots 26 are preferably long so as to guide the lever 5 in its movement.

Type-blocks 61 are rigidly secured to the long type-bars 8 and are set on the typebars at such an angle relative to the Shanks kof the type-bars, as in the Underwood standard typewriter, so that the types 61 will strike t-he platen 11 vertically. 1n combinationwith this set of types 61, I have shown case shifting mechanism, preferably a platen-shift comprising a case-shift-key 62, which, when depressed, swings a lever 63 about a pivot 64 to cause a pin 65 controlled by said lever to swing a lever 66 about its pivot 67 and pull downwardly on a link 68, which may be guided so as to have a roller 69 at its upper end overlie a cross-bar 70 to move the latter downwardly and shift the platen 11 from lower to upper-case position. The cross-bar 70 is supported at its ends by two arms 71 extending rearwardly from a rock shaft 72 supported vfor swinging movements on a typewriter carriage 7 8,` which may be guided to travel crosswise of the machine in any well-known manner. The rock shaft 72 is provided with forwardly-extending arms 74, which, when the platen is being shifted from lowerto uppercase position, swing upwardly to raise a platen frame 75 carrying the platen 11. To assist in guiding the platen-frame during case-shifting movements of the platen 11, parallel links 76 are provided.

. I have provided 'automatically-acftuated Thisis done when the segment 20 is shiftedv for type-bar-selecting. For this purpose, the style-selecting-lever 81 is provided with a downwardly-projecting arm 82 engaging with a pin 83, to slide a bar 84, guided in itsmovement and supported on the caseshift-lever 63 bystuds 85, to move theslidebar rearwardly, thereby causing a disengagement of the pin 65 with the lever 66, thus disconnecting the platen-shifting-mechanism from the case-shift-key 62. At the same time, a hook 77 is moved into engagement with a bent-off portion 78 of a link 79, to connect the case-shift-mechanism for the type-blocks or type-heads 27, hereinafter described, with the case-shift-key. The link 7 t) may be guided in any suitable manner, so as to maintain the connection with the hook 77 during the actuation of the latter. Suitable locking levers. 54 and 56, as indicated in Figure 1, may be provided to hold the case-shift-key 62 and the style-shift-key 8O in their actuated positions. Suitable stops may also be provided to limit the movements of said keys.

When the ita-lic types 10Zt are effective, the slots in the upper plate 18 are in register .with the upper ends of the levers, while the teeth or ridges of the lower plates 17 are in register with the lower ends of the floating levers 5. Thus, when lone of the character keys 1 is depressed, the lower end of the corresponding floating lever is obstructed in' its movement, so that the link 7 is drawn on to operate one of the type-bars 9 of the top set to cause italic types 10 to strike the platen 11.

Each short type-bar 9 which may be operated, as above described, has a swinging type-head 2'7 with the types 10a thereon and which is pivoted to the type-bar at 28. Each type-head is normally locked in the position shown in Figures land 4, by a spring detent 29 to yieldingly engage -i'n sockets 30, of which there are two, provided in the typehead. Each ltype-head can be swung around its pivot until the detent 29 enters the other socket 30 lto yieldingly lock the type-head in its shifted position. In the position ,of Figure 1, the lower-case type is used. Normally, that is to say, before case-shifting operations, either one of the type- bars 8 and 9 may be operated to print with lower-case type, as indicated in Figure 1. by rendering either set of type-bars effective with the style-shift-key 80. i

To perform case-shifting operations, for the types l()n on the small bars 9, the small bars having been previously selected, the key 62 is depressed to swing the key-lever 63 about its pivot 64 to draw down on the link 9 which is .engaged by the hook 77, so as to rock an arm 36 downwardly against the tension of a spring 35. The arm 36 is secured to a shaft 37, so as to rock the same, thereby moving a lever 38, secured thereto, to thrust rearwardly on a link 39. The link 39 is oper- .ated so as to have a substantially parallel movement by means of a second lever 40 extending upwardly from a rock-shaft 40a and connected by a link 41 to the lever 38. The link 39 shifts a curved, obstructing or camming rail 43, thereby rendering the caseshifting means for the small bars effective. To maintain the camming rail 43 in its movement substantially parallel to itself, there is provided, in addition to the link 39, links 44 and 45 at the ends of the rail 43 to support and guide the rail when moved. 'Bell-cranks 46 and 47` move the links 44 and 45, to which they are respectively connected. The latter, in turn, are operated by links 48 and 49 connected respectively to the iti-m36 and a similar arm 5() secured to the rock shaft 3T. The links 44 and 45 are additionally supported and guided in their movement by 'pivoted arms 5l.

The rail .43 underlies the outer ends of lugs 52 of the type-heads 27. When the caseshift-key 62 is operated, however, the rail is f moved rearward into the paths of cams 52a on the type-blocks 27, but does not change the position of the type-heads 27 until a type-bar is actually operated. `When a type-bar is operated, the rail 43 is engaged by the heel or cam 52"of type-head 2T, and rocks the typehead about its pivot 28 to bring the uppercase character into use. When the type-head leaves the rail 43, it is held in its shifted position by the detent 29 and swungs up to the platen 11, so as to cause the upper-case type thereon to strike the platen. When the typebar swings back from the platen to its normal inactive position, the type-head 27 is automatic-ally rocked. back to its lower-case position by the lug 52 engaging with the rail 43.

A suitable type-bar-rest 53 is provided, which supports the forward ends of the typeA bars 8 and 9 in their normal positions, as indicated in Figure 1. It will be seen by an inspection of Figure 1 that the lugs 52 are normally out of engagement `with the obstructing bar 43. This slight clearance may be caused by the detents 29, the pointed ends of which position the type-blocks 27 relatively to the type-bars and move each typeblock slightly after the latter has returned to its normal position, thereby raising the lug 52 out of engagement with the associated obstructing bar 43. This is done to avoid any unnecessary friction when the obstructing bar 43 is moved during a case-shifting operation.

it will be understood that each set of typel 2. Thecombinationwith a platen, of type-- bars, a plurality of complete sets of alphabet types on said type-bars, all of said types having a common printing point and co-operating with said platen, each set of types having independently-actuable case-shifting mechanism, and means, including a single key, for actuating any one of said case-shiiting mechanisms. p

3. The combination with a platen, oftypebars, a plurality of complete sets of alphabet types having a common printing point, and oo-operating with said platen, each set of types having independentlyactuable caseshifting mechanism, a single key for actuating any one of said case-shifting mechanisms, and means for rendering any one of said caseshifting mechanisms under the control of the case-shift key. y i v p 4. The `combination with a platen, of typebars, a plurality of complete sets of alphabet types on said type-bars, all of said types cooperating with said platen and having a common printing point, `platen case-shifting means for one of said sets of types, and type case-shifting means for another of said sets of types. y

5. The combination `with `a platen, of type-bars, a plurality of complete sets of alphabet types on said type-bars,'all of said types co-operating with said rplaten and having a common printing point, platen caseshifting means for one set of types, means `for eifecting a radial case-shifting of the types of the other set, and a single key for actuating any one of said, case-shifting means. Y r Y v 6. The combination with a platen, of typebars, a plurality of complete sets of alphabet types on said type-bars, all of said types having a common printing point, and cooperating with said platen, platen case-shifting means for one set of types, type caseshifting means `for effecting `a radial shifting of the types of the other set, a single key for actuating any one of said shifting means, and a key for selecting either set of types, said` key being eifectlve to render either one of said shifting' means under the control of said first-mentioned key.

7. The combination with a platen, of a set of long type-bars and a set of short typebars, each set oi' type-bars having a complete set of alphabet types, all of the types having a common printing point, platen-shifting mechanism for the types on the long type-bars, type-block shifting mechanism for the types on the short type-bars, a set of alphabet keys, and means whereby said keys may be made effective at will on one of said sets oil type-bars and the corresponding case-shift mechanism rendered effective.

8. rThe combination with a platen, of two sets of type-bars, each set having a complete set of alphabet types thereon, all of the types havinga common printing point, and caseshift means including a platen-shift effective only when one of said sets of type-bars is effective.

9. The combination with a platen, of' a plurality of sets of type-bars, one of said sets having long type-bars, one of said sets having short type-bars, each set of typebars having a complete set of upper and' lower-case alphabet types, platen-shifting mechanism for the types on said lon typebars, and type-shifting mechanism for the types on said short type-bars.

l0. The combination with a platen, of typebars, a plurality of complete sets of alphabet types on said type-bars, all of said type-bars having a common printing point, platen-shifting means for one set of types, type-shifting means for one set of types, a key-lever, and a slide whereby said key-lever may be connected with either of said shifting means.

1l. The combination With a platen, of

type-bars, a plurality of complete sets of alphabet types on said type-bars, all of said types having a common printing point, platen-shifting means for one set of types, type-shifting means for one set of types, a key-lever, a connecting member which may be moved to positions to connect said keylever with either of said shiftino means, a set of alphabet keys, and means for rendering said alphabet keys eective on the typebars of either one of said sets of alphabet types and concomitantly moving,- said connecting member to render said key-lever effective on either said platen-shifting means or said type-shifting means in accordance with the set of types to be used.

12. rlhe combination with a platen, of type-bars, a plurality of complete sets of alphabet types on said type-bars, all of said types having a common printing point, platen-shifting means for one set of types, typeshifting means for one set of types, a key-lever, and a member adapted to connect said key-lever to either of said .shifting means mounted on said bar.

13. rlhe combination with a platen, of a plurality of sets of type-bars, each set of type-bars having a complete set of upper and lower-case types, all of the types having a common printing point, platen-shifting mechanism for the types on one set of type-bars, and type-shifting mechanism for the types on another set of type-bars.

JOHN WALDHEIM.

litnesses EDITH B. LIBBEY, JENNIE P. THORNE.

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