US565694A - Carriage-feeding mechanism for type-writing machines - Google Patents

Description

(No Model.) 4 Sheets-Sheet l.

' 0.sBARs-. CARRIAGE FEEDING MEGHANISM FOR TYPEWRITING MACHINESl &c. No. 565,694. Patented Aug. 11", 1896.

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C. SEARS..

CARRIAGE PE-EDING MECHANISM FORTYPB WRTING MAHINBS, &c. No'. 565,694.` y A l Patented Aug. 11, 1896.

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l o. SEARS. CARRIAGE FEEDING MEGHANISM FOR TYPE WRITING MACHINES, &c.

Patented Aug. 11-, 1896.

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Patentedv Aug. 11, 1,896.

FIG. 4

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UNITED STATES PATENT OFFICE.

CHARLES SEARS, OF CLEVELAND, OHIO.

CARRIAGE-FEEDING MECHANISM FOR4 TYPE-WRITING MACHINES, Le

SPECIFICATION forming part of Letters Patent No. 565,694, dated August 11, 1896.

Application filed March 15, 1894. Serial Noi 503,798. (No model.)

To @ZZ whom it 77ml/ concern.-

Be it known that I', CHARLES SEARs, a citizen of the United States, residing at Cleveland, in the county of Cuyahoga and State of Ohio, have invented certain new and useful Improvements in Carriage-Feeding Mechanism for Type-VVriters, the.; and I do hereby declare the following to be a full, clear, and exact description of the invention, such as will enable others skilled in the art to which it appertains to make and use the same.

The invention consists in the construction and combination of parts hereinafter de- The invention as illustrated in the drawings Y is connected in and forms a part of a matrixmaking machine substantiallyli ke that shown and described in the application of Sears andV Miller, iiled May 27, 1893, `and serially numbered 47 5,680. The use of the invention is not limited to this machine, however, and except for certain `details of construction which especially adapt it tosaid machine the invention may be used in any analogous machine to effect the results to be presently pointed out.

In the drawings, Figure l is a rear view of the carriage-feeding mechanism. Fig. 2 is a sectional side viewon line 2 2 of Fig. 1, showing one key and the mechanism intermediate of said key and plate. Fig. 3 is a side view of the machine containing my improved mechanism. Fig. 4 is an enlarged sectional side view on the line 4 4 of Fig. l. Fig. 5 is an enlarged plan of the parts shown in Fig. 4.

tially like that shown and described in prior patent of Sears and Miller,No. 537, .905,g1anted April 23, 1895.

`Referring to the parts by letters, A represents a die, and a the shank of said die. a

represents the case in which said shank is secured to its upper arm a pin c3, which enters the vertical slot a9 in the slide a3. Secured to its lower arm is a pin ci, which enters a slot b2 in the key-lever B. The key-lever B is pivoted on the fixed rod h. On the rear side of each case a is a horizontal pin al.

The parts above described are substantially the same in construction and mode of operation as the similar parts shown and described in the prior application above named, and they constitute what may, for want of a better name, be called one-character system. There are as many systems substantially like that described as there are characters employed in the machine. The only difference between the several systems which is of any consequence in connection with the carriage-- feeding mechanism hereinafter described and claimed is in the length of the pins al@ on the rear edges of the cases a; and the lengths of `these pins are proportionate to the width of the characters, being in this respect substantially as described in said prior application.

The carriage F is mounted so as to be slidable transversely on a suitable fixed guide (Z on the rear part of frame D.

Mounted in suitable fixed bearings d' is the feed-screw shaft g, having the feed-screw G formed thereon. This shaft, as shown, lies below and parallel to the transverse path traveled by the carriage. idly connected with said carriage, and the feed-screw G screws through said bracket. It is clear that as the feed-screwis turned the carriage is moved, and the amount of such explained, is provided for connecting and dis-v connecting the sleeve e and shaft g.

A swinging pawl carrying frame ll is mounted on the sleeve e, the arms of said frame lying on opposite sides f said ratchet. Pivoted to said frame are the pawls Z1', which pawls are pressed against the ratchet by the independent springs h.

A link h2 is pivotally connected at its front end with the pawl-carrying frame H. When a force is applied to this link drawing it backward, the frame H is rocked, the pawls sliding upon the edge of the ratchet. Secured to the side of the frame H is a lug h3. (See Fig. l.) A set-screw h5 screws through this lug. Vhen the frame H swings forward, the end of said screw engages with the fixed block (Z2, and thereby the movement of the frame is stopped. By adjusting the position of this screw the point at which the frame H stops in its forward movement may be varied.

- ward and forward on the xed rods 7c.

K represents a plate which is slidable back- It extends across the rear side of this machine, so that it may be acted upon by any of the slides N, to be presently explained. Directly behind the ratchet-wheel this plate extends rearward. Y The rear end of the link h2 rests upon this plate during a greater part of the time, being held down by the spring h6, which is secured to said rear projection of plate K. In the link is a slot or hole h4, into which the pin 7a4 projects. The said pin is secured to the plate K. When the link h2 is engaging, as described, with the pin lai, the backward movement of the plate K causes the pawlcarrying frame to rock backward, whereby the pawls Zt slide backward on the ratchet E, and the distance which the pawls slide upon Said ratchet is dependent upon the amount of backward movement of said plate.

M represents a slide which slides upon the plate m. A rod m', which is secured to the slide, extends forward to a point where it is engaged by a cam Z on the driven shaft L, and the action of the cam on said rod is to draw it and the slide forward. A spring m2 pushes the rod backward when the cam is in such position as to permit of this movement.

Projecting upward from the slide M through a slot k3 in the plate K i-s a stud m3. On one side of the stud is a bevel surface m, which, as said slide moves forward, engages with a beveled rear end of the link h2, thereby lifting said link out of engagement with the pin h4. Vhen said link has been lifted as described, a further forward movement of the slide- M causes the angular projection m5 on the stud m3' to engage in a similarly-shaped recess hl in the rear end of the link, (see Fig.. 7. where-upon, as said slide M is moved forward by the action of cam Z the stud m3 pushes on the link h2, and the pawl-carrying frame H is swung forward to its first position, in which position it is stopped by the engagement of the set-screw h5 with the block CZS. As the pawl-carrying frame moves to this position one of the pawls 7L engages with the ratchet without any appreciable lost motion,

and the ratchet, and consequently the feedscrew, is. turned. Since the pawl-carrying frame always moves back to the position from which it was moved by the backward movement of plate K, it is apparent that the distance which the feed-screw is turned at any time is proportionate to the distance which the plate K was moved backward.

In order that there shall be no appreciable forward movement of the pawl-carrying frame which does not produce a like movement of the ratchet, I employ nine pawls of different lengths-five above and four below the center. These pawls are so proportioned that they engage successively with the teeth of the ratchet, and the movement of the ratchet backward a distance equal to the length of one tooth causes the nine pawls to engage successively with the ratchet teeth.

The mechanism employed to move the plate K backward will necessarily vary in different machines in which the above-described mechanism may be used. When used in a machine substantially like that shown in the prior application before mentioned, the plate is pushed back by means of the pins d10 on the rear sides of the cases af.

Just below the plate K are a series of slides N, which lie in grooves p in a bar P. On the forward end of each slide is an arm n, which lies between and in contact with the plate K and a fixed plate O. Directly in front of I each of the slides N there is a hole o in the plate O, through which the pins d10 pass as the cases-a are pushed back. Each pin d10 strikes and pushes back the corresponding slide N, and each of these slides in moving backward pushes back the plate K. The distance that the plate K moves backward depends upon the length of the pin al".

In order to prevent the plate K from moving backward a greater distance than it would be positively pushed by the slide N, l pivot to the bar P the levers W. There are as many of these levers as there are slides N, and each lies just above its corresponding slide. On the rear end of each lever is an upwardlyturned inger n2. Gn the slide is a hump n3,

which, as the slide N is moved backward, en.

gages beneath the lever n and swings it upward, so that the finger n2 passes behind the rearv edge of the plate K; and as the plate is pushed back by the continued backward movement of the slide it strikes said finger when it reaches the end of its intended backward movement and is stopped. This prevents the plate K from being carried back 3y its own momentum past the point to which i-t is positively pushed. Of course the distance between the pivots of the levers n and thev fingers n2 will vary in accordance with the variationsv in the lengths of the pins d10.

I will now trace the movement of the described parts from the key-lever 'B to the carriage F. As the front end of the keylever is depressed the bell-crank lever G is rocked. This moves the slide as backward,

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and this movement pushes back the case a, which is secured to the rear end of the slide. The pin am on the case passes through `the hole o in the plate O and pushes against the slide N. This slide moves the plate K backward and at the same time lifts the lever n. Vhen the plate reaches the intended limit of its backward movement, it strikes the finger n2 and is stopped. The backward movement of the plate draws back the link h2 because the pin 104 is in the slot h4, and this rocks the pawl-earrying frame backward. The slide M is then drawn forward by the action of the cam Z on the rod m. The first effect of this movement of slide M is to cause the bevel m4 on the stud m3 to lift the link h2 and thereby free it from the engagement with the pin 764. Then the projection m5 engages in the recess h5 and pushes the pawl-carrying frame l-l back till the screw h5 strikes the block d3. The ratchet E is turned and consequently the feedscrew is turned an amount dependent upon the distance which the pawl-carrying frame had previously moved backward.

R represents a rock-shaft, having arms r secured near its ends.' These arms are connected by links r' to the plate K. Near the middle of the rock-shaft is an arm r2. A rod r3 passes loosely through this arm and extends forward to a position where the cam Z on the driven shaft L may engage with it and draw it forward. A head r4 on the rod r3 engages with the arm r2, and as the rod is drawn forward the rock-shaft is rocked and the plate K is by reason of the described connections drawn forwarduntil it is stopped by the slides N coming in contact with the plate O. As the slide N is moved forward by the plate the hump on the slide is withdrawn from beneath the lever n', whereupon said lever falls by gravity until it rests on the bar a6. Y

This completes the description of the mechanism which takes part in the step-bystep feed movement of the carriage. In order to retract the carriage, it is necessary to disconnect the ratchet E from the shaft of the feedscrew, so that the screw may be revolved backward. As before stated, the sleeve e is secured to the shaft of the feed-screw by clutch mechanism. A description of the clutch mechanism employed is as follows, viz: On the end of the sleeve c is a disk e', having a notched edge. Secured to the shaft are the two disks c2 e3, through which slides a rod e4, adapted to be projected endwise into any of said notches. The rod @tis secured to a sliding sleeve e5, andthe sleeve is moved by a sliding bar e6, which has a notch e7, which straddles the edge of the annular fiange e8 on said sleeve. The bar e is moved by a bellcrank lever t, which is connected with a handlever T by a link-f, `the hand-lever being pivoted to the side of the machine.

Having described my invention, I claiml. In a machine of the character specified, the combination of a movable carriage, and a feed-screw, with a series of finger-keys, intermediate mechanism whereby a feed movement is imparted to the screw by each of said flnger-keys a series of movable stops n2 adapted to limit said feed movement, and mechanism for moving said stops severally into operative positions, substantially as and for the purpose specified. p

2. In a machine of the character specified, the combination of a movable carriage, a feedscrew, and a ratchet secured to said screw, with a swinging pawl-carrying frame pivoted axially with respect to said ratchet, a pawl carried by said frame, a reciprocating plate K, mechanism for actuating the same, a link secured to said pawl-carrying frame, a separable connection between said link and plate, and a slide adapted to separate said link andv plate and to push the link forward, substan-m 4:. ln a machine of the character specified, the combination of the sliding plate K, the

slide N having the shoulder n and the hump n3 with the lever lying above said plate and having a finger at its rear end, substantially as and for the purpose specified.

5. In a machine of the character specified, the combination of a movable carriage, a feedscrew, a ratchet secured thereto, a pawl-carrying frame, a pawl carried thereby, a sliding plate, mechanism connecting said plate and pawl-carrying frame, mechanism for actuating said plate, and a series of stops adapted to be moved behind said plate, substantially as and for the purpose specified.

6. In a machine of the character specified, the combination of a movable carriage, a feedscrew, aratchet loosely mounted on the shaft of said screw, a notched disk secured to said ratchet, disks secured to said feed-screw shaft, a bar slidable through said disks and adapted to engage the notches of said disk, va sliding sleeve to which said bar is secured, and mechanism for sliding said sleeve, substantially as and for the purpose specified.

In testimony whereof l affix my signature in presence of two witnesses.

CHARLES SEARS.

Witnesses:

E. L. THURsToN, L. F. GRIswoLD.

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