US1465242A - Typewriting machine - Google Patents

Description

Aug. I4, i923.

J. A. WHERRY TYPEWRITING MACHI NE original Filed Jan. v, 1921 2 sheets-'Sheet 1 Aug. 14, 1923.

J. A. WHERRY TYPEWRITING MACHINE Original Filed Jan. 7. 1921 2 Sheets-ShQG 2 Federated Aug. lie, T923.

STATES PATENT #TOEN A. WHERRY, 0F NEW URLEANS, LOUISIANA, ASSIGNOR TO UNDERWODD TYPE- WBITER COMPANY, OF NEW YORK, N. Y., A CGRPGRATION 0F DELAWARE.

Application filed January 7', 1921, Serial Efo/435,591. Renewed July 17, 1922. Serial No. 575,573.

To all. whom it may concern:

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

This invention relates to typewriting machines, and as disclosed herein is embodied in an Underwood standard typewriter. The invention has for its object to provide means for quickly and effectively inserting worksheets bottom edge frst downwardly at the front of and around beneath the usual rotative platen.

The invention comprises a guide-sheet attached at its rear edge to a .movable carrier or bar and insertable at its forward edge between the lower side of the platen and the usual curved paper-apron after the usual feed-rolls have been cast, off. This guidesheet is movable to a position in which its forward edge projects beyond the edge of the paper-apron and above the printing line there to serve as a guide for the insertion of work-sheets downwardly in front of the platen between the platen and the guidesheet. After the work-sheets have been thus inserted from the 4fron-t, the guide-sheet is withdrawn to the rear, manually-operable mechanism bein provided for moving the carrier-bar for tereby thrusting forward or withdrawing the guide-sheet as desired. This operating mechanism may comprise means including a finger-piece for irstcasting off the feed-rolls, and then, by the continued movement of the finger-piece, for advancing the guide-sheet forwardly to its guiding position.

Other features and advantages will hereinafter appear.

ln the accompanying drawings,

Figure 1 is a plan view of'a platen frame and other parts of an Underwood standard typewriting machine having the present invention embodied therein. v

Figure 2 is a front elevation of what ap pears in Figure 1.

Figure 3 is .a substantially central frontto-rear vertical section, with parts in elevation, showing the guide-sheet as retracted or withdrawn, and the usual feed-rolls in gripping relation with the platen.

Figure 4 is a similar view, with parts omitted, illustrating an intermediate stage of operation in which the feed-rolls have been cast off but before the guide-sheet has been advanced to the guiding position.

Figure 5 is a similar view after the completion of the operation by which the guidesheet has been fully advanced, and shows a work-sheet as having been inserted between the guide-sheet and the platen.

In the Underwood standard typewriting machine a rotative platen 1 is journaled by means of its axle 2 in end walls 3 of the usual platen frame or Shift frame. The platen l may be line-spaced by the usual line-spacing mechanism, shown in the drawings as including the line-space handle 4, slide 5 and line-spacing wheel 6 Xed on the platen axle 2. rlhe platen 1 may be rotated in either direction` forwardly or backwardly for adjusting work-sheets, by means of the usual knobs or finger-wheels 7 on the ends of the axle 2. rThe platen frame further comprises a usual forwardly and downwardly inclined rear paper-table 8, and a usual curved paper-apron 9 beneath the platen 1 and shown as forming a forward continuation of the rear paper-table 8. Usual front and rear feed-rolls 10 and 11 co-operate with the lower side of the platen l through openings 12 formed in the apron 9, the front 17, and are engaged by springs 18 which press the feed-rolls 10 and 11 into gripping relation with the platen l.

A usual cast-off device is provided for the feed-rolls 1 0 and 11, and comprises a fingerpiece 1f) pivoted at 20 'on the platen frame tid titi

end wall 3 at the right and connected by a link 21 to a short downwardly and forwardly extending crank-arm 22 on the adjacent end of a rock-shaft or cam-shaft 23 jour naled in bearings 24 carried by the tie-'rod 17 and provided with flattened cam-portions 25 engaging between cam-lugs 26 and 2T, which `forni downward extensions on the respective front and rear feedroll arms 15 and 16. Downward pressure .on the forwardly projecting end of the linger-piece 19 will operate to rotate. the rock-shaft 23 through an angle of'about ninety degrees, for casting od the feed-rolls from their engaging or gripping position shown in Figure 3 to their released or disengaged position shown in Figure 5, in which latter position they will be detained against the tension of the springs 18 by reason of the transverse locking position of the cams 25, as usual. In a typing operation, types carried by usual type-heads 28, one of which is shown at the printing position in Figure 3, strike upon the platen 1 at the printing line at the front thereof above the paper-apron 9. The parts so far described belong to the usual standard Underwood typewriting machine, and the features embodied in this machine involving the present invention will now be described.

According to the present invention, there is provided means for guiding work-sheets bottom edge irst downwardly at the front of and around beneath the platen 1 between the platen and the curved paper-apron 9,

such guiding means comprising a blind car.

rier-sheet or Hexible guide-sheet 29 of cloth or other suitable material, this giiide-sheet being movable between the retracted typing position thereof shown in Figure 3 and the advanced sheet-guiding position thereof shown in Figure 5. ln the typing position the guide-sheet 29 is located at the back of the platen 1 lying dat upon the upper surface of the inclined rear paper-table 8, with its lower edge at the rear of the rearfeed- Yrolls 11, so as not to be gripped thereby. In its sheet-guiding position the guide-sheet 29 occupies a position beneath the platen 1 upon the upper surface of the curved paperapron 9, wit i its forward-margin projecting beyond the forward edge of this apron and above the printing line of the platen 1, for guiding work-sheets, such as the work-sheet 3()V shown in Figure 5, downwardly and rearwardly around beneath the platen 1 on the smooth upper surface of the guide-sheet 29, the feed-rolls 10 and 11 being in the cast-oil" position shown in Figure 5 during the insertion of the work-sheet 30. Of course, instead of the single work-sheet 30 shown in the drawings for illustrative purposes, there could be a pack of any convenient number of such work-sheets with interleaved carbonsheets, as is common and well known in the art. Manually-operable mechanism, now to be described, is provided for first'casting od the feed-rolls and then for moving the guide-sheet 29--roin its retracted to its guiding position, and then, by a reverse movement, retracting or withdrawing the guidesheet 29, for the work-sheet 30, or for any such number of work-sheets as has been inserted. i

At its rear edge the liexible guide-sheet 29 is secured by means of suitable :fastening devices 31 to a carrier-member shown as a transverse bar 32. At its ends the carrierbar 32 is secured to the lower forward ends of inclined rack-bars 33, guided in slots 34 formed in the rear paper-table 8, the rackbars 33 being provided with grooves 33 to` prevent them escaping tromthe slots 34. In order to slide the rack-bars 33 along the slots 34, between the retracted and advanced positions of the guide-sheet shown respectively in Figures 3 and 4, the rear toothed sides of the rack-bars 33 are engaged by gears 35 fixed upon a transverse shaft 36 journaled at its ends in bearings 37 projecting rearwardly from the rear paper-table 8 adjacent to the end walls 3 ofuthe platen frame. For rotating the shaft 36, it is provided at its left .end with a smaller gear or pinion 38, which is engaged by a gear segment or arcuate rack 39 carried by the tree end of a rearwardly and downwardly projecting lever-arm or operating-lever 40, the forward end' of which is pivoted by means of a pivot-stud 41 on an upstanding supporting bracket 42 fixed upon the top of the adjacent platen frame end wall 3.

The above-noted mechanism for first casting od' the feed-rolls 10 and 11, and for subsequently moving the guideesheet 29 forward to its guiding position, includes a forwardly projecting handle-lever or finger-piece 43 pivoted upon the pivot-stud 41 alongside of the lever-arm which carries the arcuate Vrack 39. The handle or finger-piece 43 is provided, substantially in line therewith, with a rearwardly projecting arm 44, and is further provided with a downwardly projecting arm in angularly spaced relation with the arm 44. The rearwardly projecting arm 44 carries a stud or pin 46 which projects laterally above the lever-arm 40, and the downwardly projecting arm 45 carries a similarstud or pin 47, which projects laterally below the lever-arm 40, so that these laterally projecting pins 46 and 47 may have lost-motion engagement with the leverarm 40, which carries the arcuate rack 39. The pivotal lost motion of the operatinghandle or finger-piece 43 is utilized for casting od the feed-rolls 10 and 11 prior to the moving of guide-sheet 29 to its advanced or sheet-guiding position. For this purpose the operating-handle or finger-piece 43 is provided with a laterally projecting headed llt@ neeaaaa stud or pin 48 engageable beneath an overhanging shoulder or odset 49 formed near the upper end on a substantially vertical operating-link 50, which at its lower end is pivoted to a short downwardly and forwardly extending crank-arm 51 on the adjacent or left end ot the cam-shaft or, rockshaft Q3, for operating the latter to cast oil the feed-rolls l0 and 1l in a manner hereinbefore described. The operating-link 50 is guided by means of a headed stud or pin 52 projecting from the adjacent platen frame 4end wall 3 and engaging in a straight guideslot 53 extending long-itudinally of the link 50. The guide-slot 53 is extended upwards to form an arcuate front wall 54 below the olset or shoulder 49, and to form an arcuate guide-slot 55 above the oilset or shoulder 49, the curve of the arcuate w-all 54 and of the arcuate guide-slot 55 being concentric with the axis of the pivot-stud 41 of the lingerpiece 43 .in the cast-od position or condition of the feed-rolls l() and 11, shown in Figure 5.

` ln order to cast oil the feed-rolls l0 and ll preparatory to the subsequent forward movement of the guide-sheet 29. the lingerpiece 43 is lifted from its depressed position shown in Figure 3 toward the raised position thereof shown in Figure 5. During the initial part of this movement and until the intermediate stage ot the operation illustrated in Figure 4 is reached, the operating-link 50 will be raised by reason of the engagement of the stud 48 with the shoulder 49, thereby to cast od the feed-rolls, and during this initial upward movement of the linger-piece 43 the lost motion between the upper operating-pin 46 and the rackcarrying operating-lever 40 will be taken up, no movement being imparted to this operating-lever 40 until after the feed-rolls have been cast od. At the intermediate stage of the movement shown in Figure 4, y

by reason of the angular forward movement of the stud 48 and the substantially straight upward movement of the operatinglink 50 gulded by the stud 52, the operatingstud 48 will slip ofi' the shoulder 49 into the arcuate slot 55, and at substantially the same time the operating-pin 46 carried by the rearwardly projecting arm 44 of the fingerpiece 43 will come into engagement with the top of the operating-lever 49, as is shown in Figure 4. Further or continued upward movement of the operating-handle or lingerpiece 43 will have no eilect upon the feedrolls. which have been locked in the cast-oft" position shown in Figure 5, and the stud 48 will travel idly upward in the arcuate slot 55. However, further or continued upward movement of the linger-piece 43 will impart additional downward movement to the operating-pin 46 carried by the arm 44.

During its further or continued downward movement, the operating-pin 46 will carry with it the operating-lever 40, whereby the arcuate rack 39 carried thereby will'b'e moved downward from the upper position thereof shown in Figures 3 and 4, to the lower position thereof shown in Figure 5. During its downward movement the arcuate rack 39 will impart counter-clockwise rotation, as seen in Figure 3 and as viewed from the right in Figures 1 and 2, to the pinion 38, the shaft 36 and the gears 35, whereby Athe inclined rack-bars 33 will be caused to travel forward and downward in their aide-slots 34,v carrying with them the carrier-bar 32. As the carrier-bar 32 moves from the rear and elevated position thereof shown in Figure 3 to the forward and lower position thereof shown in Figure 5. it willv operate to thrust forward the flexible guide-sheet 29 from the retracted position thereof Shown in Figure 3 to the advanced sheetguiding position thereof shown in Figure 5. ln this latter position of the guide- Sheet 29, the work-sheet 30, or any suitable number of such sheets, may bel inserted downwardly in front of the platenat the back of the upwardly extending `forward margin of the guide-sheet 29, and may be further pushed downwardly and collated at the typing position relatively to the printing line, the bottom edge of the work-sheet being guided around below the platen by the smooth upper surface ot the guide-sheet 29. A front collating-board 56, diagrammatically shown by dot-and-dash lines in Figure 5, may be provided for conveniently adjusting and collating the work-sheets, and may be provided with a side-edge gage 57 and sheet-holding clips 58, which latter may be utilized to hold the work-sheet 30. or any number thereof, on the collating-board 56 while the guide-sheetV 29 is withdrawn or retrac-ted.

For withdrawing or retracting the guidesheet 29, the operating-handle or lingerpiece 43 is moved downwardly from the elevated position thereolC shown in Figure 5 to the depressed position thereof shown in Figure 3. ln this retracting or restoring operation, in the particular construction shown in the drawings, the initial downward movement of the linger-piece 43 will be without result, or idle, and during this initial or preliminary part of the movement of the finger-piece 43, the feed-roll 'cast-oli stud 48 will move idly downward in the arcuate slot 55 and along the arcuatelycurved wall 54 of the cast-oft link 50. while at the same time the lost motion will be taken up between the lower operating-stud 47, earried by the arm 45 of the finger-piece 43. and the lower side of the operating-lever 40, which carries the arcuate rack or gearsegment 39. The continued downward movement of the linger-piece 43 will cause lll() lll@ liti

the operating-stud 47 to lift the operatingarm 40, thereby causing reverse movement of the operating connections, above described, wherebythe guide-sheet 29 will be pulled rearwardly from between the paper-apron 9 and the work-sheet 30, and will be retracted to the flat position thereof shown in Figure '3. In the particular construction shown in the drawings, during this retraction of the guide-sheet 29, the feed-rolls 10 and 11 will remain in their cast-off position, shown in Figure 5. After the guide-sheet 29 has been withdrawn to the retracted position thereof, shown in Figure 3, with its forward edge at the rear of the rear feed-rolls ll, the feedrolls l0 and l1 may be restored to their gripping relation on the platen by means of the above-described finger-piece 19 of the usual cast-ofi' device. After the feed-rolls l0 and 11 have been restored, then the sheet-holding clips 58 may be released, after which typing may proceed as usual.

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

Having thus describedmy invention, I claim:

1. In a front-strike typewriting machine, in combination, a rotative platen, a rear paper-table behind the platen, a paper-apron beneath the platen, a guide-sheet above the rear paper-table and insertable from the rear between the platen and the paper-apron and movable forward to a position in which its forward edge projects at the front of the platen beyond the paper-apron for guiding a work-sheet inserted downwardly at the front of the platen between the platen and said guide-sheet, and manually-operable means connected with the guide-sheet, at the rear of the platen, for moving it forward to the guiding position or for withdrawing it to the retracted position.

2. In a front-strike typewriting machine, in' combination, a rotative platen, a rearpaper-table behind the platen, a paperapron beneath the platen, releasable feedrolls co-operative with the lower side of the platen, a guide-sheet normally above the rear paper-table with its forward edge at the rear of the feed-rolls and insertable from the rear between the platen and the paper-apron when the feed-rolls are cast off or released and mov-able forward to a position in which its forward edge projects at the front of the platen beyond the paperapron for guiding a work-sheet inserted downwardly at the front of the platen between the platen and said guide-sheet, and manually-operable mechanism including a finger-piece for irst casting off lthe feedrolls and then by continued movement of the finger-piece moving forward the guidesheet to its guiding position, and adapted by a reverse movement of the finger-piece to withdraw the guide-sheet to its normally retracted position at the rear of the. feedrolls.

3. In front-strike typewritingt, machine, in combination, a rotative platen, a rear paper-table at the rear of the platen, a paper-apron beneath the platen, a guidesheet overlying the rear paper-table and insertable from the rear between theplaten and the paper-apron and r-.iavable forward to a position in which its forward edge projects at the front of the platen beyond the paper-apron for guiding a work-sheet inserted downwardly at the front of the platen between said guide-sheet and the platen, and a carrier to which the rear edge of said guide-sheet is attached and which is mounted for movement to thrust the guide-sheet forward to its guiding position or to withdraw it rearwardly.

4. In a front-strike typewriting machine, in combination, a rotative platen, a downwardly and forwardly inclined rear paper-- -table at the rear of the platen, a curved paper-apron beneath the platen, a guidesheet overlying the rear paper-table and insertable from the rear between the platen and the paper-'apron and movable forward to a position in which its forward edge pro. jects at the front of the platen beyond the paper-apron and above the printing line for guiding a work-sheet inserted downwardly at the front of the platen between said guide-sheet and *the platen, a carrier-bar guided on the rear paper-table and to which the rear edge of the guide-sheet is attached for thrusting the guide-sheet forward to the guiding position or for withdrawing it to the retracted position, and manuallyoperable mechanism including a finger-piece for imparting such movements to the carrier-bar.

5. In a front-strike typewriting machine, in combination, a rotative platen, a ,rear paper-table at the rear of the platen, -a paper-apron beneath the platen, releasable feed-rolls co-operative with the lower side of the platen, a guide-sheet normally overlying the rear paper-table and insertable from the rear between the platen and the paper-apron when the feed-rolls are ca st ofl` or released and movable forward to a position in which its forward edge projects at the front of the platen beyond the paperapron for guiding a work-sheet inserted downwardly at the front of the platen between said guide-sheet and the platen, a carrier t0 which the rear edge of the guidesheet is attached, and manually-operable mechanism including a finger-piece for first casting olf the feed-rolls and then by continued movement of the finger-piece moving said carrier to thrust forward the guidesheet to its guiding position between the platen and the paper-apron, and adapted incaaca by a reverse movement of the finger-piece to withdraw the guide-sheet to its normally retracted position.

6. In a front-strike typewriting` machine, in combination, a rotative platen, a downwardly and forwardly inclined rear papertable at the rear ot the platen, a curved paper-apron beneath the platen, releasable feed-rolls' (5o-operative with the lower side of the platen, a guide-sheet insertable from the rear between the platen andthe paperapron when the feed-rolls are cast oft or released and movable forward to a position in which the .forward edge of the guide-sheet projects to a guiding position at the front of the platen beyond the paper-apron and above the printing line for guiding a worksheet inserted downwardly at the front of the platen between the platen and said guidesheet, a carrier to which the rear edge of the guide-sheet is attached, a castoii' device for the feed-rolls, an operating handle forming a linger-piece, operating connections between the operating handle and the cast-ott device for casting od'the feed-rolls during the initial part of the movement of the operating handle, and operating connections between the operating handle and said carrier for withdrawing the guide-sheet after the feed-rolls have been cast oil.

7. ln a front-strike typewriting machine, in combination, a rotative platen, a paperapron beneath the platen, releasable feedrolls co-operative with the lower side of the platen, a guide-sheet insertable from the rear between the platen and the paper-apron when the feed-rolls are cast oil'1 or released and movable forward to a position in which the forward edge of the guide-sheet projects at the front of the platen beyond the paperapron for guiding a work-sheet inserted downwardly at the front of the platen between the platen and said guide-sheet, a carrier to which the rear edge of the guidevsheet is attached, and manually-operable mechanism including a finger-piece for first casting ofi' the feed-rolls and then by continued movement of the finger-piece moving said carrier to thrust forward the guide-sheet to its guiding position between the platen and the apron, and adapted by a reverse movement of the finger-piece to withdraw the guide-sheet to its retracted position.

8. In a front-strike typewriting machine, in combination, a rotative platen, a paperapron beneath lthe platen, releasable feedrolls co-operative with the lower side of the platen, a guide-sheet insertable from the rear between the platen and the paper-apron when the feed-rolls are cast oft or released. and movable forward to a position in which the `iforward edge ot the guide-sheet pro]ects at the iront of the platen beyond the paperapron and above the printing line tor guiding a work-sheet inserted downwardly at the front of the platen between the platen and said guide-sheet, a carrier to which the rear edge ofthe guide-sheet is attached, a cast-od device for the Afeed-rolls, an operating inember connected to said carrier for inserting or withdrawing the guide-sheet, and a ingerpiece connected to the cast-ofi device tor casting ofi" the feed-rolls during the initial part of its movement and having a lost-motion connection 'to said operatinor member for subsequently withdrawing the guidesheet after the feed-rolls have been cast od.

9. In a front-strike typewriting machine, in combination, a rotative platen, a platentrame having end walls in which the platen is journaled, a downwardly and 'forwardly inclined rear paper-table forming a part of the platen-frame, a curved paper-apron beneaththe planten forming a forward continuation of the rear paper-table, a guidesheet overlying the rear paper-table and insertable at its forward edge between the platen and the paper-apron and movable forward to a position in which its :forward edge projects at the front of the platen beyond the paper-apron and above the printin line, a carrier-bar `above the rear paper-tab e and to which the rear edge of the guide-sheet is attached, a pair ot racks guided on the platenframe at each side of the machine and to which the ends or" the carrier-bar are secured,

gears engaging the racks, a transverse shaft carrying the gears and journaled on the platen-trame, an operating gear iiXed upon one end of said shaft, an operating arm pivoted upon one of the end walls of the platenframe and having gear-teeth engageable with said operating gear, and manually-operable means including a iinger-piece for rocking the operating arm tor thereby thrusting forward the guide-sheet to its guiding position between the platen and the apron or for withdrawing the guide-sheet to the retracted position.

l0. ln a front-strike typewriting machine, in combination, a rotative platen, a, platenframe having end walls in which the platen is journaled, a downwardly and forwardly inclined rear paper-table forming a part of the platen-frame, a curved paper-apron beneath the platen forming a. forward continuation ot the rear paper table, a guidesheetoverlying the rear paper-table and insertable at its forward edge between the platen and the paper-apron and movable forward to a position in which its forward edge projects beyond the paper-apron and above the printing line, a carrier-bar above the rear paper-table and to which the rear edge oit the guide-sheet is attached, a pair of recits guided the platen-:frame at each' si l, ot the l p chine and to which the ends the carrier-oar are secured, gears engaging llt) Y having gear-teeth engagea the racks, a transverse shaft carrying the gears and journaled on the platen-frame, an operating gear fixed upon one end of said shaft, an operating arm pivoted upon one of the end walls of the laten-frame and lile with Said operating gear, releasable feed-rolls beneath and co-operative with the platen, a'cast-of device for the feed-rolls including a fingerpiece, and asecond finger-piece connected to operate the cast-ofi` device during the initial part of its movement and having a lost-motion connection with said operating arm for operating the latter to thrust forward the guide-sheet to its guiding position after the feed-rolls have been cast off.

11. In a front-strike typewriting machine, the combination with a revoluble platen, of devices, including releasable feedrolls, to guide a work-sheet forwardly beneath the platen and up in front thereof, a flexible temporary sheet-guide normally in a retracted position, and shiftable means to advance said temporary sheet-guide between the guiding devices and the platen up in front of the latter, irrespective of movement of the platen, to co-operate with the platen to form a throat into which a work-sheet may be conveniently introduced, bottom end first, and thrust back to any desired typing position while said sheet-guide is stationary, the temporary guide being retractible at will by said shiftable means independently of the work-sheet introduced-by the aid thereof.

12. In a front-strike typewriting machine, the combination with a revoluble platen of releasable devices at the under4 side of the platen to guide a work-sheet forwardly beneath the platen and up in front thereof, a' flexible temporary sheet-guide permanently mounted upon the machine, means normally holding said temporary guide stationary in a retracted position durmg the revolution of the platen, said temporary guide being advanceable around the platen and up in front of the same to cooperate with the platen to form a throat for the introduction of a Work-sheet, bottom end first, down around the bottom of the platen to any desired position, While both the platen and the temporary guide are stationary, and shiftablemeans connected to said temporary guide for retracting the latter to a normal position just clear of the platen and independently of any movement of the work-sheet introduced by the aid thereof.

13. In a front-strike ty ewriting machine, the combination wit a revoluble platen, of devices to guide a sheet forwardly beneath the platen and up in front thereof, a flexible temporary sheet-guide normally in a retracted position, and means to thrust said temporary sheet-guide up in iront of the platen to co-operate with the platen to line on the form a throat whereby a work-sheet may conveniently be introduced, bottom end first, between the temporary guide and the platen, the temporary guide being stationary during the introduction of the work-sheet around the platen, and being retractible independently of the work-sheet to an idle posit1o`n just in rear of the platen.

14. The combination with a revoluble platen and releasable feed-rolls therefor, of a flexible guide-sheet, a manually-operable carrier or bar to which the rear edge of said guide-sheet is attached, said guide-sheet insertable at its forward edge by means of said bar between the lower side of the platen and the usual curved paper-apron after the feed-rolls have been released, and movable forwardly by said bar to about the printing platen, to co-operate therewith to form a throat for the downward introduction of work-sheets, and means to limit the forward movement of the temporary guide when the front edge of the same reaches a position at about the printing line on the platen, said temporary guide lbeing stationary during the guldance of the'sheets thereby down around the platen.

15. The combination with a revoluble platen, and releasable feed-rolls therefor, of afiexible guide-sheet, and a movable carrier or bar to which the rear edge of said guidesheet is attached, said guide-sheet insertable at its forward edge between the lower side of the platen and the usual curved paperapron after the feed-rolls have been released, said guide-sheet movable to a position in which its forward edge projects above the edge of the paper-apron and above the printing line to serve as a guide for the insertion of work-sheets downwardly in front of the platen between the platen and the guidesheet, manually-operable mechanism being provided for moving the carrier or bar to withdraw the guide-sheet, said mechanism including a finger-piece for first releasing the feed-rolls and for subsequently causing the guide-sheet to advance to its guiding po- Vsition.

16. In a front-strike typewriting machine, the combination with a revoluble platen and a permanent guide curved around the platen beneath the same and up in front thereof to guide a work-sheet, said permanent guide terminating below the printing point, of a flexible temporary guide mounted in rear of the platen, said temporary guide being movable forwardly between said permanent guide and the platen and up in front or' the platen beyond said4 permanent guide, to fro-operate at its upper edge with the platen to form a throat intowhich to thrust down a work-sheet, bottom-end first, to be guided rearwardly around the platen, said temporary guide stationary while it conducts the sheets down around the platen,

neonata and means for retracting said temporary guide independently ofthe introduced Worksheet to a position in rear of the platen.

17. ln a front-strike typewriting machine, the combination with a revoluble platen and a permanent guide curved around the platen beneath the same and up in front thereof to guide a work-sheet, said permanent guide terminating below the printing point, of a flexible temporary guide mounted in rear of the platen, said temporary guide being moy`1 able forwardly between said permanent guide and the platen and up in front of the platen beyond said permanent guide., to co operate at its upper edge with the platen to form a throat into which to thrust down a Work-sheet, bottom-enti first, to be guided rearwardly around the platen, said temporary guide stationary while it conducts the sheets down around the platen, means for retracting said temporary guide independently of the introduced work-sheet to a p0- sition in rear of the platen, and means for holding said temporary guide stationary in its retracted position during the rotation of the platen. y

18.A ln a front-strike typewriting machine, the combination with a revoluble platen and a permanent guide curved around the platen beneath the same and upin front thereof to guide. a work-sheet, said permanent guide' lterminating below the printingpoint, oi2 a flexiblel temporary guide mounted in rear of the platen, said temporary guide being movable forwardly between said permanent guide and the platen and up in front of the platen beyond said permanent guide, to cou operate at its upper edge with the platen to form a throat into which to thrust down a. work-sheet, bottom-endv tirst, to be guided. rearwardly around the platen, said temporary guide stationary while it conducts the sheets down around the platen, means for ren tracting said temporary guide independently of the introduced work-sheet to a po sition in rear of the platen, and means for holding said temporary guide stationary in its retracted position during the rotation ol the platen, said temporary guide having sufficient length only to extend from `trent to rear of the platen around the under side thereof.

19. ln a front-strike typewriting machine, the combination with a revoluble platen and a permanent guide curved around the platen beneath the same and up in front thereof to guide a work-sheet, said Apermanent guide terminating below the printing point, of a flexible temporary guide mounted in rear of the platen, said temporary guide being movable torwardly between said permanent guide and the platen and up in front of the platen beyond said permanent guide, to cooperate at its upper edge with the platen to form a throat into which to thrust down a Work-sheet, bottom-end first, to be guided rearwardly around the platen, said temporary guide stationary while it conducts the sheets down around the platen, means for retracting said temporary guide independently of the introduced work-sheet to a posi tion in rear of the platen, a paper-shelf mounted at the rear of the platen and extending upwardly and backwardly from said permanent guide, and means mounted for up and down movement on said paper-shell and connected to said temporary guide to advance and retract the latter.

20. The combination with a revoluble platen and a platen-frame, of a permanent guide curving around the under side of the same, lleed-rolls to run upon the under side of the platen, said' permanent guide having openingsffor said feed-rolls, a flexible temporary guide movable to a sheet-guiding position between the permanent guide and the platen to cover up said openings and adord an unbroken stationary guiding surface for the introduction of a work-sheet around the platen, and means mounted upon said platen-frame for movement towards and away from the platen to thrust forward and retract said temporary guide.

21. The combination with a. revoluble platen and a platen-frame, of a permanent guide curving around the under side of the same, feed-rolls to run upon the under side of the platen, said permanent guide having openings for said feed-rolls, a. Horrible temporary guide movable to a sheet-guiding position between the permanent guide and the platen to cover up said openings and adord an unbroken stationar guiding surface lfor the introduction o a work-sheet around the platen, means mounted upon said platen-frame for movement towards and away from the platen to thrust forward will and retract said temporary guide, and means for retaining said temporary guide in retracted idle position during the line-feeding of the work-sheets, with the front end of the temporary guide just escaping said feedrolls.

22.. ln a 'front-strike typewriting machine,

23. ln a. tront-strilae typewriting machine, l

a flexible temporary sheet-guide normally in tracted position durin the feeding around a retracted position, manually-controlled the platen of the sheet introduced by the aid means connected to said temporary sheetof said temporary guide.

guide to advance it up in front of the platen, JOHN A. WHERRY. 5 and to retract said temporary sheet-gude in- Witnesses:

dependently of the sheet introduced thereby, ARTHUR CONDOURE,

and means to hold said sheet-guide in re- A. C. BosWELL.

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