US1496192A - Typewriting machine - Google Patents

Description

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June 3 19240 J. A. WHERERY TYPEWRITING MACHINE Griginal F ed April 13. 3,921 2 Sheets-Sheet. 2

by Q5 Affa 6y Patented ctime 3, H9243.

FFICE.

JOHN A. WHERRY, OF NEW ORLEANS, LOUISIANA.

TYPEWRITING- MACHINE.

Application filed April 13, 1921, Serial No. 460,955. Renewed August '22, 1922. Serial No. 583,585.

To all whom it may concern:

Be it known that 1, JOHN A. WHERRY, a citizen of the United States, residing in New Orleans, in the parish of Orleans and State of Louisiana, have invented certain new and useful Improvements in Typewriting Machines, of which the following is a specification.

This invention relates to means for enlo abling an operator to insert sheets bottom end foremost at the front of a revoluble platen of a front-strike typewriting machine.

As set forth in my pending application, Serial No. 444,306, filed February 12, 1921,

there is rovided a flexible temporary guide,

preferab ly cloth or other fabric, which normally lies out of use back of the platen, but which may be carried forwardly under the platen and u in front thereof with its front edge somew 1at above the printing point on the platen. The work-sheet is insertible bottom end first between the temporary guide and the platen, and may be thrust down around the platen to a position to begin the first line of writing. This is done while the temporary guide remains in its advanced position, and while the usual feedrolls are cast off from the bottom of the platen. Thereupon the temporary guidesheet is pulled rearwardly and restored to its normal idle osition back of the platen, and the feed-roll s are restored to operate upon the work-sheet, whereupon the typing may proceed. Means are provided foradvancing and retracting the guide-sheet, and for automatically throwing off the feed-rolls prior to advancing, the sheet and restoring them after the sheet is retracted.

Said pending application also sets forth means for securing one or more carbon copies of typed sheets. To this end, the carbon or other web of transfer material is carried upon'a roll back of the platen. When introducing the work-sheets, the end of the car- 5 hon-Web stands about even with the end of the temporary guide-sheet at the front of the platen. The outer work-sheet, which is to receive the ink impressions, is introduced bottom end foremost between the temporary guide-sheet and the carbon-Web, and pushed downwardly as far as required, while the guidesheet' and carbon-Web remain stationary. Then another work-sheet is introduced, bottom end foremost, between the carbon-web and the platen, and pushed down as far as desired, while the remaining sheets are stationary. More than one carbon-web may be employed, so that additional sheets may be inserted between the carbon-webs. A separate spool may be provided for each carbon-Web.

The present invention relates to a machine, as described above, having a plurality of separate spools for the carbon-webs, and provides for such an arrangement of the spools that sheets inserted from the front of the machine may be pushed down until the bottom edges project past the spools. Hitherto the rearward limit of the movement of the bottom edge of a work-sheet has been at the spools which were so placed as to obstruct the easy movement of the sheet and further manipulation was necessary if the sheet had to pass beyond the spools. In the present invention, the spools are so arranged as to offer without additional manipulation a clear, unobstructed path to the work-sheet moving rearwardly beyond the spools.

Other features and advantages will hereinafter appear.

In the accompanying drawings,

Figure 1 is a plan view of the carriage of an Underwood standard typewriting machine, with the invention applied thereto.

Figure 2 is a vertical section of the device shown in Figure 1, showing the guidesheet in retracted position before the insertion of the work-sheets.

Figure 3 is a View similar to Figure 2, showing the guide-sheet in advanced position and the work-sheets inserted, the latter having their bottom ends extending beyond the carbon-spools.

A revoluble platen 1 is fixed upon an axle 2 journaled in the end walls 3 of the usual platen or shift-frame. The platen may be line-spaced by the usual line-space mechanism comprising a slide 4, 1 a pawl (not shown) on said slide engaging a ratchetwheel 5 fixed to the platen axle. and an operating lever 6 for said slide. The platen may be rotated forwardly or backwardly by means of the usual finger-wheels 7 fixed on the ends of the axle 2. The platen-frame comprises also a forwardly and downwardly-inclined rear pa er-table 10, and a curved paper-apron .11 eneath the platen, shown as forming a forward continuation of the rear table. Front and rear feed-rolls 12 and 13 co-operate with the lower side of the platen through openings in the paper-apron, the front feed-rolls being mounted upon a front feed-roll shaft 14, and the rear feedrolls upon'a rear feed-roll shaft 15. The front feed-roll shaft 14 is carried by forwardlyprojecting lever-arms 16, and the rear feedroll shaft is similarly carried by rearwardlyprojecting lever-arms 17. The lever-arms 16 and 17 are pivoted upon a transverse shaft 18 forming a lower tie-rod and are engaged by springs (not shown), which press the rolls 12 and 13 into gripping relation with the platen.

A cast-off device is provided for the feedrolls, and comprises a finger-piece 20, pivoted at 21 on one of the platen-frame end walls 3 (shown here as the right wall), and connected by a link 22 to a short downwardly and forwardly-extending crank-arm 23 on the adjacent end of a cam-shaft or rockshaft 24, provided with flattened cam portions 26 engaging between cam lugs 27 and 28, which form downward extensions on the res ective front and rear feed-roll arms 16 an 17. Downward pressure on the projecting end of the finger-piece 20 will operate to rotate the rock-shaft 24 through an angle of about 90 degrees for casting off the feedrolls from their engaging or gripping position, shown in Figure 2, to their released or disengaged position, shown in Figure 3, in which latter position they will be detained by reason of the transverse locking position of the cams. In a typing operation, types carried by usual type-heads 30, one of which is shown at the printing position in Figure 2, strike upon platen 1 at the printing line at the front thereof above the paper-apron 11. The parts so far described belong to the usual Underwood standard typewriting machine.

A blind or guide-sheet 35 is'fixed at 36 to a transverse bar 37, to which is connected a parallel-motion linkage designed to give the bar 37 and sheet 35 a motion lengthwise of the rear paper-table without skewing or other sidewise motion. Links 40 and 41 are pivotally and slidably connected at their up per ends to bar 37 by means of screws 42 and 43 passing through said links and operating in slots 44 and 45 in bar 37 and arcuate slots 51 and 52 in the rear paper-table. The links cross each other and are pivotally connected at 46, the lower ends of said links being pivotally and slidably connected to the rear paper-table 10 by screws 47 and 48 passing through said links and operating in slots 49 and 50, respectively. The rear paper-table 10 has fixed thereto, at the rear, a bar 55, said bar being attached to the platen-frame at its ends.

From the above-described parallel-motion linkage, it will be understood that a downward force applied at one side of bar 37 will move the entire bar downwardly while maintaining it in a horizontal position. Screws 42 and 43 will move to the lower ends of the curved slots 51 and 52 and to the outer ends of slots 44 and 45, while the screws 47 and 48 will move to the outer ends of the slots 49 and 50. The sheet 35 attached to bar 37 can thus be pushed forwardly around the platen without skewing or other sidewise motion.

Means are provided on the platen-frame for operating the transverse bar 37 and its attached guide-sheet. The bar is provided at one end with an ear or flange 60, to which is pivotally connected at 61 an upwardlyextending link 62. A second link 63 is pivotally connected at one end to the end of link 62 at 64, and at the other end is pivoted on a pivot-stud 65, mounted in a supporting bracket 66, fixed upon the top of the adjacent end wall 3 of the platen-frame. The bracket and linkage are mounted upon the same side of the platen-frame as the feedroll-release-lever for a purpose hereinafter to be described.

Pivoted upon the stud 65 is a lever havin a forwardly-extending arm 71 provide with a finger-piece 67, and a rearwardly-extending arm in the form of a segment 68, provided at its extreme outer limits with pins 69 and 70 adapted to lie one on either side of link 63. It can readily be seen that, by raising finger-piece 67, pin 69 presses link 63 downwardly to push transverse bar 37 and sheet 35 around the platen. and that. by lowering finger-piece 67, pin 70 presses link 63 upwardly to raise bar 37 and draw the guide-sheet rea-rwardly.

To allow for easy movement of the guidesheet, it is desirable to throw off the feedrolls before such movement begins. The mechanism for effecting this purpose comprises a headed stud 80 adapted to engage beneath a shoulder or offset 81 formed near the upper end of a substantially vertical operating link 82, the lower end of which forms an upward extension of the link 22 operating the feed-roll rock-shaft 24, so.that,

by moving link 82 upwardly, it is possible to release the feed-rolls. The link 82 is guided by means of a headed stud or pin 83 projecting from an ear 84' formed on the bracket 66 and engaging in a straight guideslot 85 extending longitudinally of link 82. The guide-slot 85 is extended upwardly to form an arcuate front wall 86 below the offset 81 and to form an arcuate guide-slot 87 above the oflset, the curve of the arcuate resales wall and the guide-slot being concentric with the axis of the pivot-stud in the position of parts shown in Figure 3.

In order to cast ofi the feed-rolls preparatory to the forward movement of the guidesheet 35, the finger-piece 67 is lifted from its depressed position, shown in Figure 2, toward the raised position thereof, shown in Figure 3. During the initial part of this movement, the link 82 will be raised by reason of the engagement of stud 80 with the shoulder 81, thereby casting ofi the feed-rolls, and, during this initial upward movement of the finger-piece 67, the lost motion between pin 69 and link 63 will be taken up, no movement being imparted to link 63. At an intermediate stage, by reason of the angular forward movement of stud 80, and the substantially straight upward movement of the link 82 guided by stud 83, the operating stud will slip off the shoulder 81 into the arcuate slot 87 at substantially the same time that pin 69 contacts with link 63. Further or continued upward movement of the operating handle or finger-piece 67 will have no effect upon the feed-rolls, since the link 82 remains in the position shown in Figure 3, the feed-rolls being cast off. Upon continued upward movement of finger-piece 67, the stud 80 will ride idly in slot 87, but pin 69 will rotate the outer end of link 63 downwardly to the position shown in Figure 3, forcing link 62 and hence bar 37 down Wardly. The guide-sheet 35 is moved forwardly aruond the platen, the parallel-motion linkage previously described operating to lead the sheet forwardly Without skewing or other uneven motion.

For withdrawing or retracting the guidesheet 35, the finger-piece is moved down wardly from the Figure3 to the Figure 2 position. The downward movement of finger-piece 67 will result in stud 80 riding down the entire length of arcuate slot 87 and along the arcuate wall 86. The stud engages no part of the operating link 82 which therefore remains in the Figure 3 position. In

t the initial downward movement of the To enable szveral duplicate copies to be made, a plurality of carbon-sheets 90, 91 are fed over the rear paper-table from rollers 92, 93, mounted on the rear table. An idler roller 94, which may be of rubber, is adapted to contact with the rollers 92, 93 outside the inserted bottom end foremost between thecarbon-sheets, the outer work-sheet being inserted between the guide-sheet and the first carbon-sheet, and the inner work-sheet being inserted between the last carbon-sheet and the platen, and are pushed around. the platen to the first line to be typed.

The carbon-rolls are generally mounted at the rear end of the paper-table, and, smce the length of the various work-sheets employed in many cases exceeds the distance from the rear or upper endof the papertable to the printing point, it is necessary to mount the carbon-rolls upon the paper table in such manner as to allow thebottom ends of the work-sheets to be pushed-beyond the carbon-rolls. From an inspection of Figure 3, it will be seen that the outer worksheet 102 extends rearwardly along the paper-apron and paper-table and passes between the table and carbon-roll 93: worksheet 101 lies adjacent carbon 91 and passes between carbon-rolls 93 and 92; and worksheet 100 rests upon carbon 90 and passes over carbon-roll 92. If the bottom ends of sheets 101 and 102 are to have unobstructed rearward movement, it is necessary'to prov1de a space between carbon-roll 93 and the paper-table, and between carbon-rolls 92 and 93, the rollers being spaced from the table and from each other in a direction substantially perpendicular to the table, and each roller being spaced above the plane of the underlying work-sheet. For this purpose, the paper-table has fixed thereto at its upper edge brackets 110, one at each side thereof, said brackets having arms 111 projecting upwardly substantially perpendicular to the plane of the table. Within the brackets are mounted shafts 112 and 113 which carry the rolls 92 and 93, said shafts being so positioned that the rolls are spaced from each other in a direction perpendicular to the table. In the right-hand bracket is journaled also a shaft 114 supporting roller 94. The lower carbon-roll 93 is spaced above the plane of the table so that the lowest work-sheet may pass thereunder. To guard against the bottom edge of the sheet striking the roll 93, due to possible curling of the sheet, a guard 115 is fixed between the arms of the brackets adjacent the lower surface of the roll, and 'is provided with an upturned forward flange 116 to direct the bottom edge of the work-sheet beneath the guard.

From the above description, it will be a parent that the carbon-rolls are in each case spaced above the plane of the underlyin work-sheet, thus allowing unobstructec movement of the bottom edge of each sheet as said sheetis pushed rearwardly from the front of the platen. When the sheets have been adjusted, the guide-sheet is withdrawn by lowering finger-piece 67 and applying the feed-rolls. When sheet 100 is arecordsheet which remains in the machine while the bill-sheet and ledger-sheet are changed, said record-sheet which is wider than the other sheets may be held to the platen, when the feed-rolls are thrown off, by the usual pressure-rolls 117 at the front of the platen. A record-sheet need not be changed frequently and hence it is usually inserted from the rear of the machine while the billsheets and ledger-sheets are inserted from the front thereof in the manner hereinbefore described.

Variations may be resorted to within the scope of the invention, and portions of the improvements may be used without others.

Having thus described my invention, I

claim: v 1. In a front-strike typewriting machine, the combination of a revoluble platen, a paper-table at the rear of the platen, a flexible sheet-guide normally in a retracted position, means for advancing said sheet-guide up in front of the platen whereby a work-sheet may conveniently be introduced bottom end first between the guide and the platen, a mounted roll of carbon-paper, the leading end of the paper being led forwardly beneath the platen and up in front thereof between said guide and said platen, to enable said work-sheet to be introduced between the guide and the carbon-paper, and to enable a second sheet to be introduced bottom end first between the carbon-paper and the platen, said worksheets being pushed rearwardly until the first line to be typed is at the printing point, said roll being mounted on said pa per-table and spaced above the plane of the table to allow said first work-sheet to pass freely and without bending between said table and said roll, and means for retracting the sheet-guide to permit typing on the work-sheets.

2. In a front-strike typewriting machine, the combination of a revoluble platen, a paper-table at the rear of the platen, a flexible sheet-guide normally in a retracted position, means for advancing said sheetguide up in front of the platen whereby a work-sheet may conveniently'be introduced bottom end first between the guide and the platen, mounted rolls of carbon-paper, the

leading ends of said rolls being led forwardly beneath the platen and up in front thereof between said guide and said platen, to enable said work-sheet to be introduced between the guide and the outermost carbon-paper, and to enable additional worksheets to be introduced between adjacent carbon-papers and beneath the innermost carbon-paper and the platen, said worksheets being pushed rearwardly until the first line to be typed is at the printing point, said rolls being mounted on said papertable, the lowermost roll being spaced above the plane of said table, and the rolls being spaced from each other to allow said worksheets to pass freely and without bending between said table and said lowermost roll, and between said rolls, and means for retracting the sheet-guide to permit typing on the work-sheets.

3. In a front-strike typewriting machine, the combination of a revoluble platen, a paper-table at the rear of the platen, a flexible sheet-guide normally in a retracted position, means for advancing said sheetguide up in front of the platen whereby a work-sheet mayconveniently be introduced bottom end first between the guide and the platen, mounted rolls of carbon-paper, the leading ends of said rolls being led forwardly beneath the platen and up in front thereof between said guide and said platen, to. enable said work-sheet to be introduced between the guide and the outermost carbon-paper, and to enable additional worksheets to be introduced between adjacent carbon-papers and between the innermost carbon-paper and the platen, said worksheets being pushed rearwardly .until the first line to be typed is at the printing point, said rolls being mounted on said paper-table with their axes in a plane substantially perpendicular to theplane of the table, the lowermost roll being spaced above the plane of said table, and the rolls being spaced from each other to allow said worksheets to pass freely and without bending between said table and said lowermost roll, and between said rolls, and means for retracting the sheet-guide to permit typing on the work-sheets.

4. In a front-strike typewriting machine, the combination of a revoluble platen, a paper-table at the rear of the platen, a flexible sheet-guide normally in a retracted position, means for advancing said sheet-guide up in front of the platen whereby a work-sheetoma conveniently be introduced bottom en first between the guide and the platen, a mounted roll of carbon-paper, the leading end of the paper being led forwardly beneath the platen and up in front thereof between said guide and said platen, to enable said worksheet to be introduced between the guide and the carbon-paper, and to enable a second sheet to be introduced bottom end first between the carbon-paper and the platen, said work-sheets being pushed rearwardly until the first line to be typed is at the printing point, said roll being mounted on said paper-table and spaced above the plane of the table to allow said first work-sheet to pass freely and without bending between said table and said roll, a guide for directing the bottom edge of the first work-sheet into the space between said table and said roll, and means for retracting the sheetguide to permit typing on the work-sheets.

5. In a front-strike typewriting machine, the combination of a revoluble platen, a

paper-table at the rear of the platen, a

flexible sheet-guide normally in a retracted position, means for advancing said sheetguide up in front of the platen whereby a work-sheet may conveniently be introduced bottom end first between the guide and the platen, mounted rolls of carbon-paper, the leading ends of said rolls being led forwardly beneath the platen and up in front thereof between said guide and said platen, to enable said work-sheet to be introduced between the guide and the outermost carbon-paper, and to enable additional worksheets to be introduced between adjacent carbon-papers and between the innermost carbon-paper and the platen, said worksheets being pushed rearwardly until the first line to be typed is at the printing point, said rolls being mounted on said paper-table, the lowermost roll being spaced from said table and the rolls being spaced from each other, and each roll being spaced above the plane of the underlying worksheet to allow said work-sheets to pass freely and without bending between said table and said lowermost roll, and between said rolls, and means for retracting the sheet-guide to permit typing on the worksheets.

6. In a front-strike typewriting machine, the combination of a revoluble platen, a paper-table at the rear of the platen, a flexible sheet-guide normally in a retracted position, means for advancing said sheet-guide up in front of the platen whereby a work-sheet may conveniently be introduced bottom end first between the guide and the platen, brackets fixed to said table, one on either side thereof, each bracket having an upstanding arm substantially perpendicular to the plane of said table, a roll of carbon-paper mounted in said brackets, the leading end of the paper being led forwardly beneath the platen and up in front thereof between said guide and said platen, to enable said work-sheet to be introduced between the guide and carbon-paper, and to enable a second work-sheet to be introduced bottom end first between the carbon-paper and the platen, said "work-sheets being pushed rearwardly until the first line to be typed is at the printing point, said roll being spaced above the plane of the table to allow said first work-sheet to pass freely and without bending between said table and said roll, and means for retracting the sheet-guide to perniit typing on the work-sheets.

7. In a front-strike typewriting machine, the combination of a revolu-ble platen, a paper-table at the rear of the platen, a flexible sheet-guide normally in a retracted position, means for advancing said sheet-guide up in front of the platen whereby a worksheet may conveniently be introduced bottom end first between the guide and the platen, brackets fixed to said table, one on either side thereof, each bracket having an upstanding arm substantially perpendicular to the plane of said table, a roll of carbonpaper mounted in said brackets, the leading end of the paper being led forwardly beneath the platen and up in front thereof between said guide and said platen, to enable said work-sheet to be introduced between the guide and carbon-paper, and to enable a second work-sheet to be introduced bottom end first between the carbon-paper and the platen, said work-sheets being pushed rearwardly until the first line to be typed is at the printing point, said roll being spaced above the plane of the table to allow said first work-sheet to pass freely and without bending between said table and said roll, a guide fixed to said brackets beneath said roll for directing the bottom edge of the first work-sheet into the space between said table and said roll, and means for retracing the sheet-guide to permit typing on the work-sheets.

8. In a front-strike typewriting machine, the combination of a revoluble platen, a paper-table at the rear of the platen, a flexible sheet-guide normally in a retracted position, means for advancing said sheet-guide up in frontof the platen whereby a worksheet may conveniently be introduced bottom end first between the guide and the plat en, brackets fixed to said table, one on either side thereof, each bracket having an upstanding arm substantially perpendicular to the plane of said table, rolls of carbon-paper mounted in said brackets, the leading ends of said rolls being led forwardly beneath the platen and up in front thereof between said guide and said platen, to. enable said work-sheet to be introduced between the guide and the outermost carbon-paper, and to enable additional work-sheets to be introduced between adjacent carbon-papers and between the innermost carbon-paper and the platen, said work-sheets being pushed rearwardly until the first line to be typed is at the printin point, the lowermost roll being spaced a ove the plane of said table,

and the rolls being spaced from each other to allow said work-sheets to pass freely and without bending between said table and the lowermost roll, and between said rolls, a guide fixed to said brackets beneath said lowermost roll for directing the bottom edge of the first Work-sheet into the space between said table and said lowermost roll, and means for retracting the sheet-guide to permit typing on the Work-sheets.

JOHN A. VVHERRY. Witnesses:

ST. CLAIR ADAMS, J. N. SWING.

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