US2027849A - Copyholder - Google Patents

Description

Jan. M, 1936. H. c. WELTER 9 COPYHOLDER Filed April 10, 1935 5 Sheets-Sheet 1 INVENIQOR H. C. WELTER Jan. 14, 1936.,

COPYHOLDER Filed April 10, 1955 5 Sheets-Sheet 2 H. C. WELTER Jan. 14,. 1936.

COPYHOLDER Filed April 10, 1955 5 Sheets-Sheet 3 ENTOR 0 Ill 9 i: 8

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Q. Welter H WELTER Jan. 14 36.

COPYHOLDER Filed April 10, 1935 5 Sheets-Sheet 4 INV OR 1936- H. c. WELTER COPYHOLDER Filed April 10, 1935 5 Sheets-Sheet 5 Patented Jan. 14, 1936 UNITED STATES PATENT OFFICE The Dawn Mfg. Corp.

poration of New York Application April 10,

23 Claims.

My present invention relates tocopyholders of the nature used by typists to hold the work being transcribed and to progressively and successively mark the reading line, and it has for its object to provide a copyholder for this and similar uses which will be light in weight; capable of production and sale at a reasonable cost; convenient in operation, and compact in form. The improvements are directed in part toward construction and arrangements for collapsing the copyholder when not in use; toward control mechanism for effecting the line indications from a remote point; toward the problem of advantageously coupling the operating mechanism with the copy actuating mechanism, and toward intervening instrumentalities for transmitting motion between the operating and actuating units.

To these and other ends, the invention, resides in certain improvements and combinations of parts, all as will be hereinafter more fully described, the novel features being pointed out in the claims at the end of this specification.

In the drawings:

Fig. 1 is a front view of a copyholder designed more particularly for typewriter use constructed in accordance with and illustrating one embodiment of my invention;

Fig. 2 is a rear view thereof;

Fig. 3 is an enlarged detail, partly in section, but otherwise a duplication of a part of the showing of Fig. 2;

arrows, but with the machine collapsed and the copy .plate in inoperative position;

Fig. '7 is an enlarged fragmentary section through the copy feeding clutch taken substantially on the line 'l--'I of Fig. 5;

Fig. 8 is a detail enlargedsection through the transmission housing taken substantially on the line 88 of 'Fig. 4;

Fig. 91s a horizontal section through the supporting upright for the copy showing the base and the operating mechanism in top plan view;

Fig. 10" is a similar view of a partly modified structure, and

Fig. 11 is an enlarged section through the operating mechanism taken transversely substantially .on theline l l-l| of-Fig. 1'0;

, Rochester, 'N. Y., a cor- 1935, Serial No. 15,641

Similar reference numerals throughout the several views indicate the same parts.

The machine of the present embodiment possesses the following general characteristics, familiarity with which will aid in quickly compre- 5 hending .the details. It embodies a fixed base and standard adapted to be secured to the typewriter desk in one way or another so that a copy supporting plate will be disposed behind the typewriter .and in front of the operator. The copy- 10 holding plate slides vertically on the standard and when not in use occupies a lower or collapsed position adapting it to accompany the typewriter into the recesses of the usual folding typewriter desk. When in operative position, the plate is 15 raised to be visible above the typewriter in line with the operators horizontal vision, which position is defined and made secure by automatic catches. The principle of operation involvesthe use of a fixed line indicator and means, in the present instance, roller means, for feeding the sheet of copy intermittently line by line past the indicator. In the case of a notebook, the pages thereof are thus fed and turned successively and mechanically. An operating connection extends forwardly at one side of the typewriter and terminates in a hand lever convenient to the keyboard of the machine. Through this and suitable flexible transmission mechanism that can accommodate itself to both the collapsed and extended pos'itions of the copy plate, the desired motion is transmitted to the sheet feeding means.

Referring more particularly to the drawings,

l indicates a transverse back base with feet 2 provided with non-abrasive buttons 3 and screw holes 4. Stability is further enhanced by a side "bar 5 detachably connected as by the screws 6 and which carries the operating mechanism hereinafter described. Rising from the base are a pair of guide rods 1 which are rigid and consti- 40 tute the standard. The copy plate 8 constituting the support and backing for the copy slides vertically on the standard between the operative and inoperative positions described, being curled at its sides, as best shown in Fig. 9, at 9 to take the guides. It is shown in its elevated or operative position in Figs. 1, 2' and l, where it is held by devices hereinafter described, but in Fig. 6 it is shown sectionally in the collapsed. position to which it is lowered until its lower edge rests on the base I.

The upper edge of this copy plate or backing 8 is inclined rearwardly, as indicated at In, and cooperating with the rear side thereof is the connecting portion or cross bar H of a clamping yoke I 2, the cross bar being provided with rubber coverings l3 to insure the gripping contact. The copy is held to the plate by this clamp. In the case of a single sheet or loose sheets, the upper margins thereof are folded over the portion In and downwardly within the clamp and, in the case of a stenographers notebook, the cover of the book and any turned pages thereon are folded over in the same way to depend within the clamp at the back of the plate. Single sheets may be fed through without resorting to the clamp, being held in place because of the clamping nature of the feeding means hereinafter described, but, in any event, each sheet is fed upwardly and rearwardly to the rear of the machine over and in the general direction of the inclination of the element ID.

The arms of the yoke I2 are pivoted upon studs l4 secured in rearwardly projecting ears l5 struck from the plate 9, which studs also carry springs l6 engaging the yoke to urge it to clamping position. One arm of the yoke, preferably the one to the left, is extended laterally and downwardly to provide a finger piece lever ll of convenient access for releasing the clamp and holding it open while the book or other copy is being inserted.

The feeding means consists essentially of a transverse shaft l8 having rubber or similar friction rollers l9 secured thereto at suitable intervals to oppose and engage the inclined portion l 0 of the plate or hold a copy sheet against the same. These rollers are very accurately turned so that they will be exactly parallel to the fixed supporting element and make simultaneous contact therewith. The shaft is carried by and has bearings in a yoke 20 pivoted at 2! to forwardly turn ears 22 on the plate 8, the pivotal point being well forward of the plate and of the roller feeding contact at Ill-l 9. The connecting portion 23 is quite wide and performs the dual function of constituting a partial housing for the feed rolls It, on the one hand, and a deflector for imparting a rearward course to the copy sheet, as aforesaid, so that it will ultimately curl over behind the machine. In furtherance of the latter function, guide fingers 24 interspersed with the rolls on the underside of this connecting portion or plate take this contact with the advancing edge of the sheet. It will be seen that by means of this yoke the shaft l8 and rolls I9 may be swung forwardly and downwardly with a parallel movement out of work and out of contact with the backing element [8 or moved rearwardly and downwardly into contact and operative feeding position, the first mentioned position being shown in dotted lines in Fig. 5 and the last mentioned in full lines in the same figure. A slot 25 in one of the cars 22 takes a pin 26 on one of the yoke arms 20 to limit these movements.

The weight of the feeding mechanism thus tends to hold it in the operative position and to contribute some pressure to the frictional contact that grips the sheet for upward movement. It is desirable, however, to augment this with spring pressure as the gravitational pressure is decreased with thick copy, such as a book. There is, therefore, provided a spring 2'! connected to each arm of the feed yoke 20 at 28, the other end being connected at 29 to the end of a rock arm 30 pivoted to the ear 22 beneath a nut 3| on a shouldered stud 32 (see Figs. 1, 2 and 5). When the feed yoke 20 is swung to the inoperative dotted line position of Fig. 5, these springs reach a dead center on their lines of action or so nearly so that the weight of the yoke can not thereby be overcome and the yoke will maintain itself so disposed.

The rock arms 30 serve as means for adjusting the tensions of the springs 21. are provided with inwardly turned ears 33 through which are threaded knurled adjusting screws 34 that react against the rear of the copy plate 8 to vary the angles of the rock arms, lock nuts 35 also being provided to maintain the positions of adjustment. There being one of these adjusting screws at each end, they can be manipulated into balance so that the even contact and distribution of frictional pressure before referred to with respect to the feed rolls I9 is effected and the feeding impulse at one side of the sheet will be the same as that at the other.

These same studs 32 are utilized to mount the line indicator, which consists essentially of a relatively narrow plate 36 that extends transversely across the face of the copy plate with its line indicating upper edge parallel with the feed rolls, as shown in Figs. 1 and 6. The copy, of course, passes behind this indicator and the view opening provided between it and the feed rolls and, in this connection, it is pointed out that the lateral cars 22 and the mechanisms mounted thereon are offset to give plenty of room for the copy with a relatively narrow backing plate through the provision of extensions of the latter,

indicated at 3?, upon which these ears are formed. The indicator is fitted with suitable sliding adjustable guides for the edges of the copy sheets which are constituted by rearward flanges 38 (see Fig. 6, particularly) on metal clips 39 that embrace the indicator plate. These guide flanges are also provided with inwardly turned ears at their rear edges to hook over the rear of the sheets so that the latter are practically embraced by the guides and fed evenly to the rolls. One edge of the plate 36 is beaded or rolled to embrace and turn with frictional resistance upon a yoke bar 4|, the arms 42 of which extend transversely through the studs 32, before mentioned, which are rotatable in the ears 22. Set screws 43 permit adjustments to vary the swing of the yoke and this, taken with the pivoting of the plate 36 itself, gives a universal adjustment to the line indicator both as to height and distance from the copy plate 8.

Mechanism within a housing 44 secured to one end of the feed yoke 20 constitutes the means (Figs. 4, 5 and 7) for rotating the feed rolls I 9 intermittently toward the operator or in a counterclockwise direction in said figures to impart a step-by-step movement to the copy in the precise use of the machine, although the feed shaft for preliminary adjustment of the copy and at all times may be turned freely in either direction by means of hand knobs 45 in which it terminates at both ends in the manner of a typewriter platen. This feeding means consists essentially of a friction clutch carried as a unit by a shouldered bushing 46 secured to the feed shaft 18 by a set screw 41. The latter also fixes to the shaft in spaced opposition to the shoulder a clutch disk 48 and confined between the two is a pulley 49 and an arm 55 each turning independently on the bushing. Pivoted to the arm 50 at 5| is a clutch link 52 provided with a laterally projecting roughened shoe 53 that rides on the periphery of the disk 43 offset from the pulley. To the other end of the link 52 is attached at 54 a cord 55 which runs over and far enough around the pulley to frictionally lock with it when pulled.

To this end, they 5 The cord runs downwardly through a guide tube 56 held by a post or rotatable stud 51 on the adjacent ear 22 and which will be further referred to. A spring 58 coiled about the shaft l8 on the inside has one end fastened to the arm 50 at 59, while the other end is fastened at 50 to a fixed part of the housing and reacts against the same.

The operation of this clutch mechanism is as follows:

A downward pull on the cord 55 with the parts in the normal position of Fig. causes it to grip and turn the free pulley 49 counterclockwise, it being desirable that the cord lock with the pulley though the latter is idle to prevent undue wear on the cord. The clutch link 53 is thereby drawn against and locks with the friction disk 48, following which it revolves with its mounting arm 55 swinging freely on the shaft, thereby rotating the shaft and feed rolls a corresponding degree in the desired feeding direction. This energizes spring 58 and at the end of the pull, when the cord is released, the slack thereof results in the release of the clutch shoe from the disk so that the arm 55 snaps back to its initial position carrying the link and shoe with it and the shoe takes a fresh grip on the then idle disk. As before stated, the feed roll shaft is free to be rotated in either direction by hand through the knobs 45 so no check can consistently be incorporated in this clutch mechanism to provide against retrograde action. It is not necessary. Inasmuch as the clutch is actuated only when the feed rolls are in work, they themselves in cooperation with the backing plate or the interposed copy with which they are engaged offer more than sufiicient resistance for the almost negligible effect the clutch link can have upon the clutch disk in returning to its initial position.

The operating mechanism for manipulating and controlling the cord 55 of the actuating mechanism is best shown in Figs. 5, 6, 8, 9 and 11. The guide tube 55 containing the flexible cord is itself flexible, being composed, in. the present instance, of a closely wound helical coil of wire which leads the cord to a housing 5| on the base i, to which housing the lower end of the tube is suitably attached at 52. Thus, the operating connection between the fixed base and the actuating mechanism for the feed roll is maintained regardless of the position of the copy plate on the standard and permits the collapsing of the copyholder as first described. It is also maintained regardless of the position of the shaft car rying yoke 20. When the latter is swung upwardly, the stud 51 rotates to accommodate a gentle curve in the guide tube 55 on nearly the same centerawhile the main portion of the guide tube maintains a desired rearward position.

The housing 6i itself I compose of a U-shaped metal stamping 53 constituting the bottom, front and rear walls and an intervening shell 55 constituting the other wall and flanged at its sides at E5 to overlap the same (Fig. 1). At 66 it interlocks with the fixed element and at the outer side it is held by a screw 61 to the same part so that it may be displaced without detaching the guide tube 55 to gain access to the interior for any reason, as, for instance, when the operating cord becomes disarranged or requires renewal.

Within the housing is a short rock shaft 55 having a free bearing in the front wall, from which latter it projects to constitute a slotted coupling connection at 59. It also projects from the rear wall, at which point it is peripherally grooved at (Fig. 4) and a keeper plate 1| (Fig.

2) detachably held to the housing by a screw engages this groove to hold the shaft in place against endwise movement in both directions. 5 Above the shaft 58 is a shaft 12 held between the front and rear walls by screws i3 threaded into its ends from the outside, which shaft carries a free running pulley I l. Secured to shaft 58 is a rock arm 15, to the outer end of which 10 operating cord 55 is attached at IS. A spring "attached to and wound about shaft 58 and reacting against the fixed part of the casing at 18 tends to hold the rock arm upright against a stop 19 in the normal position of Fig. 8 with 15 just a little slack in the cord 55 to maintain the actuating parts, before described, in the normal position of Fig. 5. When the shaft 58 is rocked to the right (from the front of the machine), the arm '55 swings down, pulling down the cord 55, which rides on pulley l4 and the actuating clutch of Fig. 5 is put to work to the extent of the throw of the arm. A guard iii) struck up from the front wall of the casing prevents the disengagement of the cord from the pulley.

At the forward end of the side arm 5 is a bracket 8! longitudinally adjustably secured thereto by a slot and screw connection 82 (Fig. 9) In the modification of Fig. 10, the arm 5 is dispensed with and the bracket 8i (reversed) is secured by the same means directly to the desk or table top at a suitably gauged point to effect the coupling about to be described. On the bracket 8! is an offset arm 83 having a vertical flange 84 rising .at the front thereof and forming a bearing for a partially tubular shaft 85. The latters position in the bearing is defined by a fixed collar 85 thereon and a non-adjustable but separate collar t'l held by a screw 88. Sliding within the tubular forward end of the shaft is the stem 89 of a hand lever 90, as shown in dotted lines in Fig. 10, which lever may be telescopically extended or retracted at will to bring the said hand lever to a convenient point for the operator adjacent to the keyboard of the typewriting machine. By vibrating this lever, which is upstanding, laterally and to the right, the shaft is rocked correspondingly and, through a coupling about to be described, the operating shaft 58 is similarly rocked to impart through the va rious instrumentalities the intermittent motion of the feed rolls as before explained. The shaft 85 and lever 90 are returned to normal position by the spring ll on shaft 68. The stem 89 is held in adjusted position by screw 88, which extends through collar 8? and the shaft into engagement therewith.

To limit and regulate the throw of the lever 55 and the shaft 85 and hence the feeding impulse to the actuating clutch on the feed roll shaft, whereby step-by-step movements of the copy give longer'or shorter line spaces, a thumb screw Qi is carried on the shaft to cooperate with a stop 92 on the bracket extension 83. It is threaded in an extension 93 of the collar 86; is provided with a lock nut 94 above and a limiting collar 95 below its threaded bearing to prevent its detachment.

The rear end of shaft 85 is coupled to shaft 58 by 70 detachable cooperating male and female elements 96 and 5'! formed thereon. As shown in the broken away portion of Fig. 4, shaft 68 has a central end bore in which fits a concentric extension 95, on the tip of shaft 85. to hold the parts 7 5.

centered and prevent the lateral disengagement of the slotted coupling.

It will thus be seen that assembly of the operating mechanism with the actuating mechanism is very simple, the coupling of the shafts being accomplished by a simple relative endwise movement, which accomplishment defines the position at which the bracket 8! should be secured, particularly in the embodiment of Fig. 10. In this embodiment also, it may be explained, instead of the fixed feet 2 of Fig. 9, that forwardly extending feet 2 that are pivoted to the base at 99 and provided with screw holes l!) are arranged to take under the legs of the typewriter, with relation to which they may be adjusted by the pivoting at 99 or secured with screws independently of the typewriter.

Referring now to Figs. 2, 3 and 6, I will describe the means whereby the copy plate 8 is positioned and locked in its raised or operative position. A double acting latching means is desirable so that the copy plate may be drawn up and stopped at the proper point without leaving the standard entirely and then supported against descent. To these ends, I provide each guide rod 1 on its inner side with a notch, the upper shoulder NH of which is undercut or downwardly inclined and the lower shoulder L92 of which is square and provided with an adjacent inwardly inclined cam surface I63. Adjacent to each guide rod is pivoted to the plate 3 at a latch 505 urged outwardly by spring I86. The upper and lower faces of the engaging portion of the latch are complementary to the shoulders if and I82 of the guide rod notch. In the lowered position of the copy plate, the latches ride idly on the rods but when the plate is drawn up, they snap into the notches and prevent both upward and downward movement until released. The cam surface E 53 allows the latch to assume an engaging alinement with stop shoulder I53! before it actually goes into engagement with supporting shoulder M32 and hence, if the copy plate is forcibly raised with a sudden jerk, the latches will not miss the notches, that is, override them, but will inevitably engage.

To lower the copy plate, the latches are simultaneously withdrawn by means of a common op rating element. his consists of a hand lever ES? projecting from the left side of the machine and extending through a guide bracket E08. It is one arm of a bell crank lever pivoted centrally to the copy plate at l 99. Links 8 l0 pivotally connected to the respective latches at their outer ends have their inner ends pivoted with a limited sliding movement in slots H! in the bell crank on opposite sides of the pivot thereof so that vibration of the lever will pull both latches inwardly in opposite directions. The slotted connection gives the necessary freedom of movement to the latches for independent engagement and disengagement without aifecting the bell crank operating lever, while a spring H2 holds the latter in a normally idle position against the end of its guide it?) acting as a stop. In other words, spring i2 no direct functional action with respect to the latches.

There is a remaining function derived from the constructions and arrangements described and flowing more directly from the proportioning thereof, which function is addressed to the proposition of holding the feed rollers free'when the copyholder is folded and the copy plate is lowered and out of use so that the operating contact between the rolls and the backing portion 10 will notlead to flattening the surface of the rolls and interfere with uniform feeding action during their rotation. This is accomplished in a very simple manner. The guide rods 1 of the standard are of such length that when the copy plate is 5 brought to its lowermost position to rest on the base the housing and deflecting plate 23 will engage their upper ends and be forced forwardly a substantial distance so that the feed rolls swing clear of the copy plate and a substantial space is 10 maintained between them. The contact is, of course, restored when the copy plate is raised to operative position. In this respect, Fig. 6 shows the feed rolls thrown out, while in Figs. 1 and 2, they are in working contact.

I claim as my invention:

1. In a copyholder, the combination with a standard embodying vertical guides and a copy support movable on the guides between a raised operative position and a collapsed inoperative position, of feed rolls cooperating with the support when in operative position to pinch and feed a copy sheet upwardly and rearwardly and means for holding the rolls free of the support when the latter is in inoperative position.

2. In a copyholder, the combination with a standard embodying vertical guides and a copy support movable on the guides between a raised operative position and a collapsed inoperative position, of feed rolls cooperating with the support when in operative position to pinch and feed a copy sheet upwardly and rearwardly and means actuated automatically when the support is in inoperative position for holding the rolls free of the support.

3. In a copyholder, the combination with a standard embodying vertical guides and a copy support movable on the guides between a raised operative position and a collapsed inoperative position, of feed rolls cooperating with the support when in operative position to pinch and feed a copy sheet upwardly and rearwardly and means on the support engaging the guide rods when the support is in inoperative position for holding the rolls free of the support.

4. In a copyholder, the combination with a copy support, a feed roll adapted to cooperate therewith to pinch and feed a copy sheet thereon, and means for bodily swinging the roll with a parallel movement toward and from the copy plate to permit the copy to be inserted, of a spring connected to said means tending to move the roll into work, an arm pivoted to the support and to which said spring is also connected, and means reacting between the arm and the support for adjusting the position of the arm and thereby controlling the tension'of the spring.

5. In a copyholder, the combination with a copy support, a feed roll adapted to cooperate therewith to pinch and feed a copy sheet thereon, and means for bodily swinging the roll with a parallel movement toward and from the copy plate to permit the copy to be inserted, of a spring connected to said means tending to move the roll into work, an arm pivoted to the sup- 5 port and to which said spring is also connected, and means reacting between the arm and the support for adjusting the position of the arm and thereby controlling the tension of the spring, said last mentioned means comprising a set screw threaded into the arm and engaging the support.

6. In a copyholder, the combination with a copy'support, a feed roll adapted to cooperate therewith to pinch and feed a copy sheet thereon, and means for bodily swinging the roll with a. parallel movement toward and from the copy plate to permit the copy to be inserted, of a pair of ears on the copy support, rotatable studs in the ears, arms pivoted on the studs, springs connected to the roll swinging means and to the arms tending to move the roll into Work, means reacting between the arms and the support for adjusting the position of the arm and thereby controlling the tension of the springs, and a line indicator swingingly mounted on the studs.

7. In a copyholder, the combination with a standard, a copy supporting plate thereon provided vwith forwardly extending portions and means for feeding a copy sheet while carried on the supporting plate, of rotatable studs on the said forwardly extending portions of the copy plate, swinging arms transversely adjustable in the studs, and a line indicator carried by the arms to span the copy sheet.

8. In a copyholder, the combination with a copy support and means embodying a shaft having a feed roll thereon cooperating with the copy support to pinch and feed a copy sheet thereover, of means for imparting a step-bystep rotation to the shaft and roll embodying a clutch disk fixed to the shaft, a rock arm free on the latter, a clutch arm pivoted to the rock arm and having an offset shoe engaging the periphery of the clutch disk, a pull cord connected to the rock arm, and a spring for returning the latter.

9. In a copyholder, the combination with a copy support and means embodying a shaft having a feed roll thereon cooperating with the copy support to pinch and feed a copy sheet thereover, of means for imparting a step-bystep rotation to the shaft and roll embodying a clutch disk fixed to the shaft, 2. rock arm free on the latter, a clutch arm pivoted to the rock arm and having an ofiset shoe engaging the periphery of the clutch disk, a pull cord connected to the rock arm, a pulley free on the shaft interposed between the clutch disk and rock arm and on which the pull cord passes, and a spring for returning the latter.

10. In a copyholder, the combination with a copy support, means embodying a shaft having a feed roll thereon cooperating with the copy support to pinch and feed a copy sheet thereover, and a swinging support for the shaft to carry the roll into and out of work, of a casing carried by the swinging support into which the shaft extends, clutch means on the shaft within the casing for rotating the same and embodying a pull cord extending through the casing, a tubular guide for the pull cord extending into the casing, and a stud support for the guide rotatably mounted on a relatively fixed portion of the copy support. I

11. In a copyholder, the combination with a supporting frame adapted to be secured to a table top and carrying a line guide, and means for advancing copy past the line guide, of driving gear on the base for said advancing means, a separate bracket adapted also to be secured to the table top in spaced relationship to the supporting frame and independently thereof, said bracket having a bearing, a rock shaft in the bearing detachably operatively coupled to the driving gear, and means for manually operating the rock shaft.

12. In a copyholder, the combination with a supporting frame adapted to be secured to a table top and carrying a line guide, and means for advancing copy past the line guide, of driving gear on the base for said advancing means, a separate bracket adapted also to be secured to the table top in spaced relationship to the supporting frame and independently thereof, said bracket having a bearing, a rock shaft in the bearing adapted to be detachably operatively engaged with the driving gear by a coupling movement in a direction axially of the rock shaft, and means for manually operating the latter.

13. In a copyholder, the combination with a base, standards thereon, a copy plate on the standards, a feed roll for advancing copy over the copy plate, and means for actuating the roll embodying a pull cord, of a casing on the base into which the pull cord is extended, a rock shaft journalled in the casing and carrying an arm to which the cord is also attached, and an operating shaft extending forwardly from the base and casing and having a detachable coupling connection with the rock shaft.

14'. In a copyholder, the combination with a base, standards thereon, a copy plate on the standards, a feed roll for advancing copy over he copy plate, and means for actuating the roll embodying a pull cord, of a casing on the base into which the pull cord is extended, a rock shaft journalled in the casing and carrying an arm to which the cord is also attached, the forward end of the rock shaft being provided with a coupling element and a central bore, and an operating shaft extending forwardly from the base and casing and having a complementary coupling element cooperating with that on the rock shaft including an extension entering the bore of the latter.

15'. In a copyholder, the combination with a base, standards thereon, a copyplate on the standards, a feed roll for advancing copy over the copy plate, and means for actuating the roll embodying a pull cord, of a casing on the base into which the pull cord is extended, a rock shaft journalled in the casing and carrying an arm to which the cord is also attached, the rear'end of the shaft being provided with a groove outside of the casing wall, an operating shaft extending forwardly from the base and casing and having a detachable coupling connection with the forward end of the rock shaft, and a retaining clip on the rear Wall of the casing cooperating with the groove in the rock shaft.

16. In a copyholder, the combination with a base, standards thereon, a copy plate on the standards, a feed roll for advancing copy over the copy plate, and means for actuating the roll embodying a pull cord, of a casing on the base into which the pull cord is extended, a rock shaft journalled in the casing and carrying an arm to which the cord is also attached, and a shaft secured between the front and rear casing walls over which the cord runs, the rock shaft being also journalled in said walls, the latter being fixed tothe base and the top and side walls being composed of a separate detachable and replaceable piece.

17. In a copyholder, the combination with a base, standards thereon, a copy plate on the standards, a feed roll for advancing copy over the copy plate, and means for actuating the roll embodying a pull cord, of a casing on the base into which the pull cord is extended, a rock shaft journalled in the casing and carrying an arm to which the cord is also attached, an operating shaft extending forwardly from the base and casing and having a detachable coupling connection with the rock shaft, an adjustable bracket having a bearing for the forward end of the shaft, and an adjustable operating lever provided with a stem having a telescopic engagement with the latter.

18. In a copyholder, the combination with a base, standards thereon, a copy plate on the standards, a feed roll for advancing copy over the copy plate, and means for actuating the roll embodying a pull cord, of a casing on the base into which the pull cord is extended, a rock shaft journalled in the casing and carrying an arm to which the cord is also attached, an operating shaft extending forwardly from the base and casing and having a detachable coupling connection with the rock shaft, an adjustable bracket having a bearing for the forward end of the shaft, and an adjustable operating lever provided with a stem having a telescopic engagement with the latter, the shaft being provided with a fixed collar and an attached collar to confine it in the bracket bearing, the attached collar being held in place by a set screw also functioning to hold the stem of the operating lever in adjusted position.

19. In a copyholder, the combination with a standard embodying a base and a pair of guide posts rising therefrom and a copy plate movable upon the guide posts between a lowered collapsed position and a raised operative position, the posts near their upper ends being provided with notches having undercut upper shoulders and opposed lower shoulders, of a pair of spring latches on the copy plate having complementary shoulders adapted to automatically engage in the notches to limit upward movement and support the plate in operative position.

20. In a copyholder, the combination with a standard embodying a base and a pair of guide posts rising therefrom and a copy plate movable upon the guide posts between a lowered collapsed position and a raised operative position, the posts near their upper ends being provided with notches, of a pair of latches on the copy plate adapted to engage in the notches to limit upward movement thereof and to support the plate in operative position, and a common operating means projecting laterally of the copy plate for releasing both latches.

21. In a copyholder, the combination with a standard embodying a base and a pair of guide posts rising therefrom and a copy plate movable upon the guide posts between a lowered collapsed position and a raised operative position, the posts near their upper ends being provided with notches, of a pair of latches on the copy plate adapted to engage in the notches to limit upward movement thereof and to support the plate in operative position, and a common operating means projecting laterally of the copy plate for releasing both latches, said operating means embodying a bell crank lever pivoted to the copy plate and links pivoted to the respective latches and connected to the bell crank on opposite sides of its pivot.

22. In a copyholder, the combination with a standard embodying a base and a pair of guide posts rising therefrom and a copy plate movable upon the guide posts between a lowered collapsed position and a raised operative position, the posts near their upper ends being provided with notches, of a pair of latches on the copy plate adapted to engage in the notches to limit upward movement thereof and to support the plate in operative position, and a common operating means projecting laterally of the copy plate for releasing both latches, said operating means embodying a bell crank lever pivoted to the copy plate and links pivoted to the respective latches and connected to the bell crank on opposite sides of its pivot, the said connections to the bell crank consisting of slots in the latter engaged by pivotal ends of the links.

23. In a copyholder, the combination with a standard embodying a base and a pair of guide posts rising therefrom and a copy plate movable upon the guide posts between a lowered collapsed position and a raised operative position, the posts near their upper ends being provided with notches, of a pair of latches on the copy plate adapted to engage in the notches to limit upward movement thereof and to support the plate in operative'position, a common operating means projecting laterally of the copy plate for releasing both latches, said operating means embodying a bell crank lever pivoted to the respective latches and having lost motion connections with the bell crank on opposite sides of its pivot, springs for actuating the latches, and a separate spring for holding the bell crank in a neutral position.

HERMAN C. WELTER.

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