US2366022A - Typewriting machine - Google Patents

Description

G. F. HANDLEY TYPEWRITING MACHINE Fied June 19, '1942 5 Sheets-Sheet 2 .wm wm. E

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Patented Dec. 26, 1944 UNITED 'STATE-s, PATENT ori-'ICE 2,366,022 TYPEWRITING MACHINE George F. Handley, Glendale, N. Y., assignor to Royal Typewriter Company,.lnc.,' New York, N. Y., a corporation of New York Application June 19, 1942, Serial No. 447,701

y 10 Claims. (Cl. 197-133) This invention relates to typewriting machines and more particularly to typewriting machines equipped or adapted for writing on ribbons or tapes, as is commonly done in the sending or receiving of telegrams.

An object of the invention is to provide' an improved arrangement for mounting a supply of type-impression-receiving tape or ribbon on typewriting machines.

Another object is to provide va tape or ribbon mounting of the character stated and which is vadapted to be positioned at or preferably someproved device for severing from the tape or rib- 1 bon a portion thereof which has been typed or printed upon.

Telegraphic messages -usually are typed with wider than usual type faces and the step-by-step f carriage movements consequently are longer than l in standard or portable typewriters. In adapting a portable typewriter for writing with large type faces and relatively large feed movement steps there has been difficulty in properly positioning the carriage at its line starting position` because of a tendency of the carriage to move back a step to the left after having been brought up against the center stop and lthen released. One way of overcoming this diiiiculty is to provide a check pawl for preventing reverse rotation of the escapement wheel, but such a, pawl vwill interfere with the operation of back spacing mechanism of the kind in which the back spacing is effected by rotating the escapement wheel reversely. An object of the present invention is to provide mechanism including 'a back check pawl for preventing the undesirable leftward step movement of the carriage from its line starting position in combination with means responsive -to actuation of the back spacing mechanism actuator for disabling the pawl'so as to permit back spacing movement of the escapement wheel. Such .mechanism is disclosed herein and is dis- Y .closed and claimed in divisional application Serial .Number 480,368 filed March 24, 1943.

Other objects will become apparent from a reading of the following description, thel appended claims, andthe accompanying drawings, in which:

Figure l is a top plan view of -a typewriter embodying the invention, with some conventional typewriter parts omitted and with a movable tape supply device shown in extended or operative position;

Figure 2 is an end view mainly in elevation but with some parts shown in section, this View being on a larger scale than Figure 1;

Figure 3 is a top view partly in section and partlyin elevation showing ribbon feeding mechanism as viewed from above in Figure 2;

Figure 4 is a fragmentary sectional view on the line 4-4 of Figure 2;

Figure 5 is a vertical sectional view through a feed roller .showing how it is mounted on a feed roller drive shaft;

Figure 6 is a fragmentary sectional view on the 'line 6-6 of Figure 2;

Figure 7 is a fragmentary sectional view on the irregular lines 'l-l of Figure 1, drawn on an enlarged scale;

`Figure 8 is a fragmentary view mainly in elevation but with some parts shown in section on the line 8 8 of Figure 7 Figure y9 is a detail view in vertical section on the line 9-9 of Figure 1 showing an arrangement for applying a drag or frictional resistance to the rotation of a tape supply roll;

Figure 10 is a perspective view partly in section showing the mounting of tape finger guides on a card guide scale;

Figure 11 is a fragmentary view looking substantially at right angles to the irregular line lI-II in Figure 2;

Figure 12 is a view partly in end elevation and partly in section showing on an enlarged scale the relative positions of a platen, a type impression receiving tape,vand ink ribbon mechanism;

Figure 13 is a perspective view of a typewriter carrying case and typewriterembodyng the invention in place in the case and conditioned to permit closing of the case cover;

Figure 14,is a fragmentary top view mainly in elevation but withy some parts shown in section, illustrating escapement mechanism and back spacing mechanism associated therewith, the parts being shown in their inactiveA positions as when the typewriter carriage is at rest;

Figure 15 is a view similar to Figure 14 but with the parts shown in the positions they 0ca typewriter having the general organizationof` parts and features of the Royal Portable machine. The typewriter includes a main frame A which is adapted to be housed with the mechanism supported thereon in a carrying case B as indicated inFigure 13. The frame A comprises end walls I and 2 and a mask or, cover 3 all of known construction. A pair of `bottom rails 4-4fsupported on the main frame mounts a carriage C through the medium of carriage rails 5.-*5 and ball bearings 6 interposed between the respective pairs of rails 4 and 5, the carriage being thus mounted for. letter spacing and return movements endwise of the frame. Mountedl in the usual manner on the carriage C is a cylinder or platen I so positioned that the writing line is behind the cover 3 and somewhat below the top of the cover as shown in Figures Zand 7. The usual complement of type bars is'provided, one type bar being shown `at 8. in Figures 1 `and 2. The type bars may be operated by any suitable mechanism including key levers 9. The platen is equipped with iinger knobs` IUT-I0 and the usual combined line spacing and carriage return lever is shown at II. The parts referred to thus far are usuall or conventional equipment in machines of the character referred to.- Other conventional parts will be referred to as the descriptionproceeds and still othersnot. referred to specifically in the description will be recognizedv as` being shown in the drawings.,

In its general nature the mechanism for rsupplying and feeding type-impression receiving` tape along the platen preferably includes a tape supply means generallydesignatedD mounted adjacent the right hand end of theV main frame A, means for training or guidingtape from the supply D along the writing line, and mechanism generally 4designated E mounted on the left'hand end wall 2 of the frame A and being adapted to pull or draw the tape from the supply means D in response to letter spacing movement of the carriage, the arrangement being such that the talle is fed at exactly the same speed as the carriage travel.

The type impression receiving tape is relatively thick as compared to carbon paper ribbon often used in roll form in connection with manifolding work. Consequently in order to provide a tape supply which will last for a substantial time without. requiring frequent replenishment, the supply necessarily is somewhat bulky. One feature of the present invention is to provide I for the mounting of a large and somewhat bulky tape supply so that it'may'be properly positioned with respect lto the typewriter for convenient feeding, and it also is adaptedvto be positioned compactly with respect to the typewriter so as to permitnthe typewriter and the tape supply to be readily' housed or enclosed inthe carrying.

spool.

tively in two positions, in the first of which the supply is positioned beyond one end of a typewriter frame entirely clear o-f the keys and other operating mechanism, and in the other of which positions the supply is located compactly above the cover 3 and between the ends I and 2 of the main frame so as not to obstruct or interfere with the closing of the lid or cover of the carrying case B.

In the illustrated embodiment, a supply of tape I2 is wound upon a spool I3 and the spool is so supported that it may be positioned selectively as shown in Figure 1 for operation, or as shown in Figure 13 for co-mpactness. For thus mounting the spool I3 a bracket I4 secured by screws I5 to the frame A is formed with upper and lower 'flanges I6 and I'I which mount a vertical shaft I8 for. combined pivotal and sliding movement. The Shaft I8 is secured to and depends from a plate I9. A bearing disc 20 on the bottom of the plate I9 is adapted to rest upon the flange lr6 when the parts are in the position shown in full lines in Figures 1 and 'l wherein the` parts are conditioned for supplying tape to be fed alongthe writing line. Astud 2| se-cured to theplate. I9 at a point offset from or eccentric to the shaft I8 extends upwardly forr journalling the spool I3. The spool is provided with a core 22 and is formed with a central opening which ts snugly but with operating clearance over the stud 2 I. A sleeve 23 fitted within the core 22 and bored to receive the stud ZI is hel-d in place by a washer 24 and screw 25 threaded into the top of the stud 2l. A lball bearing assembly 26 interposed between the top -of the plate I9 and the bottom of the spool I3 anti-frictionally supports the spool for rotation about the stud 2|. When the machineisconditioned for operation with the plate I9 swung outwardly to the position shown in full lines in Figures 1 and 7, the spool will be positioned at a level generallybelow the top of the cover 3 and the tape I2 as' it comes 01T the spool will be `and below the top. of the cover. After leaving the spool I3 the tape passes in contact witha guide roller 21 and thence along the printing line without substantial deviation from the level of the A bracket 28 and pintle 29 mounted` on the plate I9 pivotally support a pressure finger 30 urged into contact with the rolled tape by a spring 3|, so as frictionally to retard rotation of the spool and prevent accidental unwinding of the tape when the machine is not in use. Guard lingers 32 may be provided for preventing the spool I3 from tipping.

A cover 33 adapted to be positioned removably onthe plate I9 and above the spool I3 is provided withspacer blocks 34 and pins 35 adapted to project into bores 36 in studs 3'I extending upwardly from the plate I9. The pins 35 are formed with circumferential grooves 33 adapted torreceive detent buttons 39 urged intothe grooves 38 by springs 4I). The lower ends ofthe pins 35 are rounded or somewhat pointed so that when the pins are moved down into the bores in the studs 3'I, the detent buttons 39 will be cammed outwardly and then will move into the grooves 38v for releasably holding the cover 33vin place. Preferably the `cover 33 is formed withla sight opening 4I to permitthe operatortoobservelat main frame.

spool at any time.

When it isdesired to store the entire machine in the carrying case B, the plate I9 and the spool I3 carried thereonlare raised to the position shown in dotted lines in Figure 7, the raising movement beinglimited by `engagement of a collar 42 on the shaft I8 with the bottom of the frame flange I6. Then the plate and spool are swung inwardly about the axis of the shaft I8 to .the positioshown in Figure 13 wherein the plate I9 and spool I3 are located directly above the typewriter between the end walls I and 2 and generally within the horizontal margins of the from resting upon the cover '3,a projection 43 is secure-d to the plate I9 and extends downwardly so that its lower end may engage the flange I6 when the plate is in its Figure 13 posi- `43a in Figure 8. When the plate I9 and spool I3 are moved toward their positions beyond the end wall I, the projection 43 will ride over the flange I6 until it arrives over an opening 43b in the ange I6. The projection 43 is then free to move downwardly through the opening 43h so as to permit the plate I9 and spool I3 to .be lowered to their operative positions.

It is desirable that the plate I9 andspool I3 be maintained against accidental displacement from their operative positions. In accordance with the invention, the plate I9 is equipped with a locking pin 44 having a large diameter portion 45 adjacent the plate'and a smaller diameter portion 46 at its lower end. The flange I6 is formed with an arcuate entrance opening 41 terminating in an aperture 48 of greater width than the entrance opening 41. In operation, when the plate I9 is moved from its Figure 13 position toward its operative position, the reduced end portion 46fof the locking pin 45 will move horizontally through the` entrance opening 41 vuntil the enlarged diameter portion 45 of the vlocking Vpin is positioned over the aperture 48.

The plate I9 may then lbe lowered so as to project the enlarged locking pin 45 into the aperture 48. The pin portion 45 is wider than the entrance opening 41 so that' the pin cannot move out of the aperture 48 without first .being lifted. Thus the parts are held releasably in their operative positions and cannot be displaced by accident or by the pull incident to the feeding of the tape I2,

Guides for positioning the tape I 2 accurately at the printing point may be carried upon the letter spacing guide scale member 49. As usual, the member 49 is formed with the clearance opening 59 for accommodating type heads and is marked with scale divisions I. The tape guides shown at 52 are supported on the member 49 at both sides of the clearance opening 5I] so that there is only a short unsupported length of tape at and immediately adjacent the printing point. The guides 52 are of general channel shape and each includes a web 53and top and bottom ange portions 54 and 55 having respectively inturned ends 56 and 51. The intur'nedend portions 51 are secured to the scale member 49 by rivets 58. As shown in Figures 11 and 12 the scale member 49 is secured by screws 59 to a frame bracket 68. The usual vibrator 6I is provided for the ink ribbon 62 and a type bar guide 63 is positioned in l frontof the clearance opening 5I).

In order to prevent the plate I9:

`to the shelf portion 61.

'After being :moved'to the left andbeyond the guides 52 the tape is led to the feeding mecha'- nism E which is adapted to pull or draw the tape along the writing line only during letter spacing movement of the carriage and at a rate exactly 4equal to the letter Vcarriage space travel. The

mechanism E may be constructed to operate on the same principle as the mechanism disclosed and claimed in UnitedStates Letters Patent to Handley No. 2,280,702 granted April 21, 1942. It includes a bracket assembly comprising sections 64 and 65 secured to the main frame A by screws 66. The'bracket section 64 is formed at its top with an upper shelf 61 which overlies a lower Vshelf 68 formed at the top of the bracket section 65. The section 64 moreover is formed with two spaced vertical wings 69 and 18. A shaft 1I journaled on the wings 69 and 19 supports for free rotation a pulley 12 loose on the shaft. The pulley is mounted substantially in the same vertical plane as the spring barrel 13 which provides power for drawing the carriage to the left during letter spacing travel. The pulley is held against movement axially of the shaft by a collar 14 and ratchet wheel 'I5 both secured to the shaft and positioned respectively on opposite sides of the pulley. A carriage draw band 16 secured to the spring barrel 13 as at 11 and secured to the'carriage as at 18 passes around the pulley 12 so that as the carriage is moved the draw band 16 will rotate the pulley. A ratchet pawl ,19 pivoted on the pulley12 is engageable `with the ratchet wheel 15 for driving the latter `the shelf portions 61 and 68 is equipped at its 'upper end with a rubber covered feed roll 83 which lits over a. reduced part 94 on the shaft 82 and is held in place'by a nut 85 bearing against aA disc 86 which presses the feed roll 83 against the shoulder formed at the vjuncture of the larger and the smaller portions of the shaft 82'. Abevel gear 81 secured to the shaft II meshes with a bevel gear 89 fixed to the shaft 82 so that during rotation of the shaft 'I I, the feed roll 83 will be driven. Tape fed to the mechanism E passes between a guide finger 89 and `an idler guide roller 99 rotatable on a stud 9I xed As shown in Figure 3 the tape passes about half way around the idler roller 99 and thence behind and in contact with the feed roll 86, the free end I2f of the ribbon then. extending outwardly to the left of the typewriter. i

In `order to facilitate removal of the tape free end portion I2f, a severingdevice is mounted in cooperative and convenient association with the feed roller 86. In the form shown this device v includes a cutting edgev 92 carried by a bail 93 In operation when the t carriage is; moved to-.the leftv in the letter ,spacingfdirection the draw-,band 16 will rotate the pulley 12rto driveithe shafts 1r| and 82 and the feed roll 83. The tape I2 will be pulled along by its frictional contact with' the f eed roll 83 and discharged beyond thelcutting edge 92. The diameters of the pulleys 12 and the feeding roll 83 are so related to the diameter of the spring barrel 13 that the-taper |2 willl be fed in unison with movement ofthe platen 1, thus assuring that a freshunused portion ofthe tape will be presented for receivingeach type impression and all the type impressions will be uniformly spaced. When typed matter of a length which may be removed as-a unithas passed beyond the severing edge 92, it may bedetached readily by simply drawing the free end portion |2f' ofthe tape forwardly against the edge 92; It will be seen that the spring 98 will yield to permitA the bail 93k to be moved selectivelyto its normal operating position or toa position for facilitating threading of the tape betweenthe feed roll 83 and pressure roll 91 when. preparing the machine for operation.

Escapement mechanism, back spacing mechanism, and associated controlling parts areA shown in Figures 14 to 19 inclusive. Because of :the large width of the typehfaces and the resultantincreased length of letter spacing step movements, the escapement Wheel is provided with only six teeth a, b, c, d, e, and f. The escapement wheel |0| is fast with a bushing |02 which is freely rotatable on a stud shaft |03 secured to a bracket |04 which is attached byscrews |05 to plates |06 connecting the bottom rails 4. A pinion |01 is mounted to rotate freely on the bushing |02 and meshes with the usual carriage feed rack |08.- A pawl L09 pivoted on the escapementwheel |0| is urged into engagement with the pinion |01 by a spring ||0. The arrangement is such that the rack |08 tends to rotate the pinion |01 counterclockwise as viewed in Figures 14vand 15, rotation of the pinion, however, being normally restrained by the pawl |09 carried by the escapement wheel |0I which normally is held stationary by escapement dog mechanism which may be similar to that disclosed in thev patent to Handley No. 1,792,012 granted February 10, 1931, It includes an escapement frame pivotally mounted on the bracket |04 as at ||2| |2. The frame carries a relatively fixed dog H3. A movable dog ||4 is pivoted as at ||5 on the frame and is formed with a stop ||6 engageable with a stop arm ||1 on the frame when the parts are in their positions of rest as shownin Figure14. In this position the escapement pinion |01 and .wheel |0| are being urged counterclockwise but rotation is prevented by engagement of the escapement wheel tooth b with the dog ||4, the stop H6' of which is pressed against the frame stop ||1. The dog ||4 is formed with heels ||8 and ||9 adapted to be engaged by a lever pivoted at |2| on the frame and urged against the heels by a spring |22 anchored on a-frame ear |231 The operation of this class of escapement dog mechanism is well known and it is believed unnecessary to describe it in detail.

The back spacing mechanism per se is fundamentally similar to that disclosed in the Handley Patent No. 1,792,012 previously referred to. It includes an actuator slide |24 mounted toreciprocate in ears |25 formed on the bracket |04. A back spacing pawl l|26 pivotedon the slide member |24 as at |21 isl urgedcounterclockwise as viewed in Figure 14 by a spring |28, Movement of the pawl byfthe springzis limited' by engagement of a pawl ear |29 with thel bottomof'the actuator slidev |24, and movementof the pawl in the opposite direction is limited by engagement of a pawl ear |29al with the topof the slide |24. The pawl |26 is formed with two teeth or noses |30 `and |3| spaced longitudinally ofjthe direction oi` movement of the slide |24.

In operation, mechanism including a key lever or the like (not shown) is actuated to movethe slide |24 toward the right from its Figure 14 po,- sition. The pawl nose |30 will engage the escapementv wheel tooth a: and rotate the escapement Wheel |0| reversely, thus'also driving the escape ment pinion |01 reversely so as to move the carria'ge rack |08 and carriage inthe return direction. Because of the wide circumferential spac ing of the escapement teeth, thepawl nose |30 would slip off the tooth a before back-spacing equivalent-t0 a f ull letter space increment could be effected. However, before the nose |30 can slipoff the tooth a, the trailing pawl nose |3| will movein behind the tooth b and continue to move the escapement wheel reversely until the tooth c has moved above the escapement dogs I3 and ||4 as shown in Figure 15. In thisway the completion of a back spacing movement equivalent to a letter spacing increment is assured.

It has been found that due to'the very great circumferential spacing of :the escapement wheel teeth, manual sweep movement of the carriage in the return direction and up against the center stop (not shown) followed by release of the carriage may result in movement of the carriage in the letter spacing direction, permitting the escapementl wheel tomove about one tooth thus feeding the tape almost a complete letter space. This of course would result in an uneven :spacing at the beginning of typing after the carriage had been returned. To overcomethis difliculty means are provided for preventing reverse rotation of the escapement wheel |0| when the carriage is returned manuallyy and for automatically permitting the escapement wheel tobe rotated reversely whenl the back spacing mechanism is operated. In the form shown a check pawl |32 pivoted as at |33 on the right hand track plate |06,has a nose |34 normally positioned as shown in Figure 14,just behind an escapement wheel tooth two removed from the tooth held by the escapement dog 4||4. A spring |35 interposed between the rearmost rail 4 and a tail |36 on the pawl |32 yieldably holds the pawl |32 in this position. Duringv carriage letter spacing travel when the escapement wheel rotates counterclockwise as shown in Figure 14, the pawl |32Wi1l be liftedby escapement wheel teeth so that they may p ass freely under the pawl. However, during carriage return sweep movement the pawl |32 will holdthe escapement wheel |0| against re- `verse rotation, movement of the carriage being permitted by the freedom of the escapement pinion |01 to move reversely while the escapement wheel is held stationary.

When the back spacing mechanism is operated, the check pawl |32 must be disabled or rendered ineffective so as to permit the escapement wheel |0| to rotate reversely (clockwise as viewed in Figure 14). The check pawl |32 is formed with a cam |31 which isengageable with a part|38 carried by the back spacing pawl |26. Normally the part |38I simply supports the cam |31'and back check pawl |32in the position shown in Figure 14; but when theactuator |24 ismoved to the right, the part |38-wil1 slide'underthe cam |31 and lift the pawl |32 out of the path of the escapement wheel teeth as shown in Figure 15, thus permitting the back spacing pawl |26 to rotate the escapement wheel l! reversely in the manner previously described. The pawl |32 serves the dual purpose of avoiding back lash or overthrow movement of the escapement wheel |0| and also preventing uneven letter spacing following the manual return of the carriage to a new line starting position.

I'he escapement and back spacing mechanism may be provided with a back space pinion lock comprising a lever |39 pivoted on the bracket |04 as at |40 and being provided with a hooked end |4| engageable with the escapement pinion |01. A spring |42 interposed between the bracket |04 and an ear |43 on the lever |39 normally holds the lever in its inoperative position as i shown in Figure 14, wherein the hooked end |4| is held against a portion of the bracket |04. To-

. ward the end of a back spacing movement the ear |29 on the back spacing pawl |26 engages a tail |44 on the lever |39 so as to rock the lever against the u rge of the spring |42 and bring the hooked end l 4| into locking engagement with the escapement pinion |01.

The mechanism disclosed herein embodies the invention in the form now preferred; but it will be understood that changes may be made without departing from the invention as defined in the appended claims.

I claim:

f l. In a tape or ribbon supply mounting for typewriting or like machines, a frame part at one end of the machine main frame, a tape or ribbon supply spool; a journal for said spool; and means mounting said journal on said frame part for movement selectively to a position in which the spool is journalled generally beyond said end of said main frame and to a position over said main frame and generally within the horizontal margins of said main frame.

2. In a typewriter or like machine, la main frame; a cover thereon, a carriage and platen mounted on said main frame to travel behind said cover; a tape or ribbon supply spool; a journal for said spool; and means mounting said journal on said main frame for movement selectively to a position in which the spool is located generally beyond one end of the main frame and at a level such that tape or ribbon fed from said spool will, without substantial vertical deviation from theflevel of the spool, pass along the printing line of the platen below the top of said cover,

and to another position in which the spool is located at a higher level and is positioned over said cover and between the ends of said main frame. y

3. In a tape or ribbon supply mounting for typewriting or like machines, a frame part at one end of the machine main frame, a tape or ribbon supply spool; a `journal for said spool; a plate on which said journal is carried; and means pivotally mounting said plate on said frame part to swing selectively to two positions, one generally beyond said end of the main frame, and the other over the main frame and generally within the horizontal margins thereof.

4. In a tape or ribbon supply mounting forl typewriting or like machines, a frame part at one end of the machine main frame, a tape or ribbon supply spool; a journal for said spool; a plate on which said journal is carried; means pivotally mounting said plate on said frame part to swing selectively to two positions, one generally beyond said end of the main frame, and the lother generally over the main frame and between the ends thereof; anaperture in said frame part; and a pin depending from said plate and being adapted to lbe received in said 'aperture for holding said plate in said one position.

5. In a tape or ribbon supply mounting for typewritingor like machines, a frame part at one end of the machine main frame, a tape or ribbon supply spool; a journal for said spool; a plate on which said journal is carried; and means mounting said plate on said frame part for pivotal movement about an axis eccentric to the journal axis and for independent straight line shifting movement along said eccentric axis.

6. In a tape or ribbon supply mounting for typewriting or like machines, a frame part at one end of the machine main frame, a tape or ribbon supply spool; a journal for said spool; a plate on which said journal is carried; means mounting said plate on said frame part for pivotal movement about a vertical axis eccentric to I the journal axis and for independent straight line shifting movement along said vertical axis; and means for supporting said plate selectively at two levels with respect to said frame part.

7. In a tape or ribbon supply mounting for typewriting or like machines, a frame part at one end of the machine main frame, a tape or ribbon supply spool; a journal for said spool; a plate on which said journal is carried; means mounting said plate on said frame part for vertical movement and for pivotal movement about an axis eccentric to the journal axis; an opening in said frame part; and a projection depending from said plate and adapted to extend down through said opening -to permit said plate to be supported at a relatively low level on said frame part, said projection being adapted to be lifted with said plate clear of said opening and then removed laterally and away from said opening to engage the frame part and support the plate at a relatively high level.

8. In a tape or ribbon supply mounting for typewriting or like machines, a frame part at one end of the machine main frame, a tape or ribbon supply spool; a journal for said spool; a plate on which said journal is carried wa vertical shaft mounted for both rotary and sliding movement on said frame part; a 'plate supported on said shaft; and means for Xing selectively two different levels of the shaft and plate with respect to said frame part.

9. In a tape or ribbon supply mounting for typewriting or like machines, a frame part at one end of the machine main frame, a tape or ribbon supply spool; a journal for said spool; a plate on which said journal is carried; a vertical shaft mounted for both rotary and sliding movement on said frame part; a plate supported on said shaft; an opening in said frame part; and a depending projection on said plate adapted to be received in said opening when the plate is in one angular position with respect to the frame part to permit said plate to descend to a relarotary movements on said frame part; a horizontal plate supported on said shaft above said frame part; an aperture in said frame part; fafpin depending `from said plate and having a locking portion of such size as to'be insertable by vertical movement into said aperture, `an `entrance opening extending from an edge 'of said frame part horizontally in to said aperture and being of less width than said pin 'locking portion; a reduced portion on the lower end .of said pin of suchsmail size as to permit said reduced vportion to move horizontally through Lsaid entrance opening to position said locking portion above said aperture; and `means for supporting a ribbon or tape supply on said plate.

GEORGE F. HANDLEY.

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