US1687208A - Paper finger for typewriting machines - Google Patents

Description

Oct. 9, 1928. 1,687,208

' F. w. HILLARD PAPER FINGER FOR TYPEWRITING MACHINES Filed NOV. 2, 1922 21 INVENTOR Patented Gets, 1928. 7

FREDERIC W. HILLARD, 0F TOT'IENVILLE, NEW YORK.

PAPER FINGER-FOR TYPEWRITING MACHINES.

Application filed November My present invention is in the nature of acontinuation and improvementof my prlor Patent Number 1,408,003, patented February 28. 1922.

For convenience I have shown my herein devices applied to a modified Underwood typewriter, as in mysaid prior patent. But it will be understood that the invention 18 of wide application and capable of use on various models of typewriters, andI accordingly do not intend to limit it to useon the particular machine which I show. I I

In the drawings, which form apart of this specification:-

Figure l is a plan view of the platen and a. pair of my herein paper fingers, on the platen in normal writing position, and of a fragmentary portion of the carriage.

Fig. 2 is an enlarged view of the left hand paper finger. contrivance, removed from the machine. It shows, in full lines, the paper guide, which includes the carrying arm an the paper guiding finger, in latched or locked, normal or set work engaging position. v fhen it is desirable to swing the paper guiding finger from within the. work field, as shown in full lines, it can be swung into its reversed position out of the work field, as shown in dotted lines.

3 is an enlarged view of the left hand paper finger contrivance, as seen when the carrier has been swung upwardly and rearwardly on the carriage, about the guide'rod, from the front when the contrivance is in the carriage; the device being shown, as in Fig. 2, re noved from the guide rod and carriage. This view also shows the paper guide in locked or latched, normal or set, work holding position on the support, and with the support moved to position up and further backthan in Fig. 2.

Fig. t is an enlarged side view of the left hand paper finger of Fig. 1 looking in the direction of the arrow on the line t4=-of Fig. paper guide being in its latched or set work engaging position within rk field. r

5 is a sectional side view of Fig. 2, on 2-2, looking upward in the direction of the arrow in Fig. 2.

6 is a cross section of Fig. 2, looking in ection of the arrow on the line 7 7 of and 5; the cross section of this View "arked by the line 5-5 on F ig. 5.

is a detail of Fig. 3, turned at right 0 illustrate the hinge joint between 2, 1922. Serial No. 598,653.

the support and the carrying arm, as seen looking down'at the said arm and crosswise of the oint; and the figure also shows some of the co operating parts.

Fig. 8 is an enlarged view of the punched out blank, from which either the right hand or the left hand paper finger support. may be formed, depending on which way the blank is bent up.

It will be obvious from Fig. 7, that the carrying arm 32 and its paper guide, finger 19, the two together constituting the paper guide numbered 39 in the drawings, will'be reversed relatively to the platen 21, whenswung'on the hin 'e joint 3031, into the abnormal posi-' tion shown in dotted lines in Fig. 2'; and that wh n so swung, the guide finger 19,..which in normal position. conforms to. and faces the platen, as illustrated in Fig. 4, will be curved oppositely to and faced away from the'platen.

Referring to Figure '8, the paper finger blank, as punched out comprises the connecting bar 10, between the circular yoke bearing perforations 11, 11 whichlatter when the ends ofthe bar are bent up, constitute the parallel bearings for the guide rod 12. Facing each other in the perforations 11, '11 as punched out, are the slots 13 '13 disposed, when the ends are bent up, to take in the usual pin 14: (Fig. 4), which is spring pressed into slot 15 of guide rod 12, by the usual bow spring 16. Each of the paper finger supports or carriers 17' and 18, which are thus numbered respectively as entities, are provided with the usual pin 14 and spring 16, to spring press the paper guide fingers 19 and their guide rollers 20, to the platen 21, to press the work sheets to the platen to a point considerably abovethe printing line, to insure good type' written work. 7

' All of the foregoing parts are of the same character as in my said prior patent, and

substantially similar thereto, excepting the,

blank shown in Fig. 8, so that I have described them but briefly. The blank punching is different from my support. in said patent, constituting when formed up, a one part carrier instead of the two part support of the, patent. In making the present blank I also provide the convex expansions 22, 22, one at each edge of each end of the bar 10, the center lines of the double convex portions at each end of the bar 10, being respec i'vely on the lines 6-6 and 7-7 on Fig. 8. The blank is bent up at the lines 66 and 7 to form the supports or carriers 17 and 18, as shown in Fig. 1, being bent in one direction to form the left hand support 17 and in the reverse direction to form the right hand support 18.- l have marked the'lines 66 and 77 on Figs. 2, 3 and 5 to indicate the lines of bending up of support 17, and the support 18 is similarly bent on, the same lines in the reverse direction, as marked on 1. The blank is preferably a sheet metal one, punched out of sheet steel.

1 so form my bending die that when the punch crowds the blank 10 down into the die, to bend it into the carrier 17 or 18, both of the convex expansions 22, 22 at both ends of the connecting bar 10, will be crowded upwardly and inwardly between the opposite edges of the punch and the inner side walls ot the die, forming the flat convex portions in the blank into the reinforcing flanges 23, 23 on the opposite edges at each end of the bar 10,

as is clearly shown in Figs. 2, 5 and 6. 'Tl ese flanges are not only raised in a direction vertical to bar 10, as clearly shown in Figures 2 and 5, but the punch is so formed and is of such size, as to force the metal to flow inwardly, into thickened portions, preferably in c'oncavely curved form, as clearly shown at 242, 24 in Fig. 6. Also while the unbent convex portions at each end 01": the bar 10 in the blank shown in Fig. 8, are much wider than the intervening central portion of the bar; when the blank is bent up into the carriers 17 and 18, as shown in Figs. 2, 3 and 6, such end portions have been reduced to substantially the same width as the said central'portion.

This results in getting the stock of the widened portions of the blank up into the flanges of the supports 17 and. 1S and out of the way of the work sheets and platen when the supports are mounted in their working positions and swung about the guide rod 12 on the carriage of the machine; and at the same time of still preserving the full strength of said convex projections, as punched out (Fig. 8), when bent up into the finished supports. This getting the widened stock out of the way, is of importance since there is but little room between the bar 10 and the platen 21, in the normal position of the device, as shown in Fig. 4;, and there is still less room while the support is being swung about the guide rod 12, to lift the paper guide to ele vated position to release the work sheets, as shown in dotted lines in Fig. 2.

Also on the rear edge of the device, there is but a limited amount of room for the in sertion of the work sheets between the platen and the usual paper apron (not shown), so that if the convex curved. portions 22, 22, of Fig. 8, were left protruding rearwardly in the bent up supports, they would be apt to catch on the work sheets, while the latter were being inserted. on the platen. All of these objections are obviated, while still preserving the full strength of the convex extensions of the blank, or even increasing it, by drawing the metal upwardly within the side walls or the die and forcing the metal to flow inwardh; from both edges of the bar 10, due

to the relative size and shape of the punch ano die. Therefore, instead of the sharp, right angled bends extending entirely across the bar 10, at the lines 66 and 77, such sharp, right angled bends extend across the central portion only of the barin my herein devices; and toward each edge there is a thickened body of metal, resulting in great strength and rigidity at the lines of bend 6-6 and 7 1 find in practice that my herein flanges, above described, completely overcome the difficulty while at the same time enabling me to employ an equally strong single part car rier herein. This very materially simplifies the herein contrivances and reduces their cost.

Hence my present invention, sul ituting my reinforcing flanges in place of the reinforcing bracket of the prior patent, constitutes an important improvement over the in vention of said patent. Referring to Figure 8, the blank has also punched therein the four holes 25. for fastening the latch, or locking spring, or latch spring 26, and the'banking stop 27 to the support plate or carrier plate 23, as by rivets 29. The blankis also provided two horns which are curled up to term the two outer members 30 of the hinge joint between the plate 28 and the'carryingarm 32, the carrying arm being provided with the intermediate curled member 31 of the joint.

The carrying arm is also provided with a device 33 for the latch to normally catch into. This device may be termed the catch device or the latch finger or the locking finger; and the latch 26 acts upon latch finger 33, to normally snap over and spring press the carrying arm down against the banking stop 27, the latch thus acting as the second member of the latching device, the locking finger as above described constituting the first or other member thereof. The spring 26 is also provided.

with the thumb piece 34. By bending the banking end of the stop 27 upwardly or clownwardly, (Fig. 3) or the upper portion of the stop, above the top rivet 29. outwardly away "from its position against plate 28, as shown in the drawing, its relation to carrying arm 32 will be varied, so that the set or work holding position of the carrying arm relatively to plate 28, will also be changed. Such adjustment serves to parallel the axes of rollers 20 with-each other and with the axis of the platen shaft 35, and it is useful for other purposes which do not require mention; the ad justment being of importance in connection with the paper teed.

When it is desired to re-lock the paper linger devices. or to restore the carrying armto its set position on the support, after it has been swung out of the work field, as shown in dotted lines in Fig. 2, all'thatis necessary to be done is to swing the carrying arms back into the work field, or toward each other, until they collide with the banking stops in the latched set ositionof the arts; In thisre turn movement the latch spring 26 yielding ly permits the return of the finger 33 and then automatically snapsover the catch, which is formed to permit such operation, thus forcing the arm 32 against stop 27, in the set position of the paper guide on the carrier or support.

In snapping the carrying arm' against the banking stop, the pressure of the spring latch against finger 83, tends to tilt the carrying arm relatively to the pivotal bearing on support plate 28 and this takes up any lcoseness in the pivotal bearing in one direction. But latch 26 also exerts a direct inward pressure on catch finger 33 'toward thepivot 10 of the insures the required rigidity in the bearings and at the same time permits of a'moderate looseness in the unlocked condition of the devices. The former is of great importance in securing the best control of the work sheets at the platen, and the latter is very desirable so that the devices can swing freely and easily into the unlocked position of: the paper fingers. v

While the looseness in the bearing is thus taken up in two directions at the end next the locking finger 33, it is taken up at the other end'by the engagement of arm 32'with the banking stop 2'7 and the. pressure of the spring latch 26 on the carrying arm, pushing the arm forcibly against the banking stop. It will be notedthatthe latch 2-6 engages with the edge of the upper surface only of the carrying arm 32, while the banking stop 27 engages with the lower surface only thereof. The set position of the paper guides is the one wherein the carrying arm engages with the banking stop, with the latch hooked over the locking finger 33 of the carrying arm. Hence the set position of the paper guide '39 is determined by the position and adjustment of the banking stop 27, the upper end of which may be bent up or down for the purpose of bringing the paper guide into the desired set position.

The paper guiding fingers and their rollers :20 are normally spring pressed to the platen by the bow springs 16, spring pressed pins 1% and the slots 13 of the supports and 15 of the guide rod 12, as usual. Such spring pressure on the paper guiding fingers and this is a mere matter of convenience.

rollers tendsto swing the carrying arms 32 forwardly of the platen and to unlatch the spring 26 from the catch-finger 33. But the pressure of the spring latch 26 is sufficient to resistand overcome such unlatching tendency. Thus the s'prings26fact as effective locks to hold the paper guides in'their set positions. The engaging faces of the spring latches E26are, however, preferably inclined relatively to the direction of the swinging movement ofthe fingers 33 with which they engage, so that thepaper fingers can be pulled open by hand, if so desired.

My present contrivance is to insure that the locks may safel be unlatchedby adirect moderate pull on the free ends of the carrying arms, without pressing on the thumb pieces and'without any liability of breaking the latches. In my presentcontrivance, an ample curve is provided in the spring 26, to' take in the catch finger 33, and the face 41 of the latch, which engages with the latch finger,is inclined relatively to the direction of the swinging movement of the finger about the pivot 40' on the carrier. Hence inlthe present device the unlockingcan be readily. and safelyaccomplished, as above described by a direct pull on the free ends ofthe carrying arms, and at the same time the paper guide 39 is safely lockedto its carrier17 or '18.

I have shown the banking stop 27, herein as mounted on the supports-17 and 18, but

banking stop may obviously be mounted either on the support and engage with the carrying arm, or be mounted on the carrying arm and engage with the support or it may be integral with either the support or the carrying arm and be bent up to engage with the other member. Likewise the latch may be mounted either on the support or the carrying arm and'the catch finger be on the other member. I

I also believe the process to be new and novel, which I have devised'and show here in, of stamping out of sheet metal a paper finger blank, comprising with the support plate, two yoke bearing'perforations and an intermediate connecting bar, to be bent up at each end to-form the yoked bearings, and of providing at either end of the connecting bar projections inthe blank extending laterally at the edges on the lines of the bend; and of so folding the blank into the paper/finger support in a die, as'to crowd'the said laterally The 7 thickened reinforcing portions at the sides of the bends within the reinforcing flanges. And in this process I do not intend to limit myself to forming such reinforcing flanges at both. ends of the connecting bar, asv shown in the drawings, because the device will be a good, strong paper finger support if the bend at the end of the connecting bar next the support plate only, be thus reinforced? However, I prefer the device as shown in the drawings, provided with reinforcing flanges and inwardly extending thickened portions gt the bends at both ends of the connecting an. v

I have employed herein various technical terms, such for example, as plate, as applied to the support or carrier, work field, as applied to the field of the work sheets, springpressure means, as applied to the de vices for pressing the paper fingers to the platen, lock, locking means and locking linger, as applied to the device or members therefor, for latching the carrier and paper guide together, and the terms longitudinal,

transverse and lateral, as applied to the platen and carriage. These and other technical terms used herein, have the same meaning herein, as similar terms had in my said prlor Patent Number 1,&O8,003, wherein all such terms are fully defined. Therefore, for brevity, instead of repeating herein, the definitions there made, I will make reference for such definitions to said prior patent.

Having thus described my invention what I claim .as new, and desire to secure by Letters Patent is,

1. In a typewriting machine, the combination with the platen,-of a two part paper finger device, one part comprising the paper finger and its carrying arm and the other part being the support therefor, the carrying arm being hinged to the support in such manner that the paper finger may be swung on the support into and out of the work field, means for latching the two parts together in work holding position, such means comprising a spring latch and a banking stop on the support, the latch engaging that side only of the carrying arm whereon it canexert its spring pressure to latch the paper finger in its work holding position on the support and the banking stop engaging the opposite side of the said arm to arrest the arm when it has been brought into its work holding position.

2. 'In a typewriting machine, the combination with the platen, of a two part paper finger device, one part comprising the paper finger and its carrying arm and the other part being the support therefor, the carrying arm being hinged tothe support in such manner that the paper finger may be swung on the support into and out of the work field, means for latching the two parts together in work holding position, such means comprising a spring latch and a banking stop on the sup port, the latch engaging that side only of the carrying arm whereon it can exert its spring pressure to latch the paper finger in its work holding position on the support and the banking stop engaging the opposite side of said arm to arrest the arm when it has been brought into its work holding position, the banking end of said stop being bendable to vary the work holding position of the paper finger on the support. a

3. In a typewriting machine, the combination with the platen, of a paper finger contrivance comprising a support, a paper guide pivotally mounted thereon, and a device for normally locking said guide to said support in its work holding position, said device. including a banking stop at one end of said pivotal bearing and a lockingfinger and a spring latch at the opposite end, tending to tilt the paper guide on the support to tighten the bearing in the locked position of the parts.

4. In a typewriting machine, the combina tion with the platen, of a paper'finger con-' trivance comprising a support, a paper guide pivotally mounted thereon, and a device for locking said guide to said support in its work holding position, said device including a banking stop at one end of said pivotal bear ing and a locking finger and a spring latch at the opposite. end, tending to tilt the paper. guide on the support to tighten the bearing in the locked position, and means for unlocking the device and for thereby loosening said pivotal bearing.

5. In a typewriting machine, the combination with the platen, of a paper finger cont-rivance compr1sing a carrier and a paper guide thereon, said guide being pivotally movable on the carrier lengthwise of the platen into and out of the work field,,a device to control theset position of the paper guide on the carrier, including a spring latch on the carrier normally engaging said guide to move it to said position, and a banking stop to arrest said movement at said set position.

6. In a typewriting machine, the combination with the platen and apaper finger carrier, of a laterally swinging paper guide on the carrier, means normally pressing said guide to the platen, a normally operative lock, means for rendering said lock inoperative during the lateral swinging movement of" the guide, and a device for tightening the guide on the. carrier when the lock is operative and whereby the guide is, loosened when the lock becomes inoperative.

7. In a typewriting machine, the combination with the platen, of a paper guide and a support therefor, the support being pivotally mounted to swing said guide transversely of the platen, spring pressure means for normally swinging the guide to the platen, a jointed connection between the guide and the support, whereby the guide may be moved independently on the support, said spring pressure means tending to open the joint, and a ocatch,

ing face on at least one of said engaging devices being inclined to the direction of 'incven1ent of sald guide, whereby to unlatch the holding devices simply by a pull on the paper guide.

8. In a typewriting machine, the combination with the platen, of a paper finger sup port having a yoked bearing for movement transversely of the platen, said support being provided with a connecting bar between the yoked bearingsxand with a carrier plate extending forwardly from one of said bearings, and reinforcing flanges and inwardly extendingthickened portions, on each edge of said bar at the bend between the bar and the bent upyoked bearing having the carrier plate.

Signed by'me at Tottenville, New York, this 12thday of April, 1922.

FREDERIC HILLARD.

Images