US2352155A - Printing telegraph apparatus - Google Patents

Description

June 20, 1944. E E 2,352,155

PRINTING TELEGRAPH APPARATUS Original Filed June 14, 1941 3 Sheets-Sheet l VINVENTOR ALBERT H. REIBER fORNEY June 20, 1944. RE|BER 2,352,155

PRINTING TELEGRAPH APPARATUS Original Filed June 14, 1941 3 Sheets-Sheet 2 FIG. 2 p

FIG.3

- INVFNTOR ALBERT H. REIBER ATTOR N June 20, 1944. E E 2,352,155

PRINTING TELEGRAPH APPARATUS Original Filed June 14, 1941 s Shee tS-Sheet s I VIIVI-D k INVENTOR ALBERT H. REIBER Patented June 20, 1944 2,352,155 PRINTING TELEGRAPH APPARATUS Albert II. Beiber, Evanston, type Corporation, Chicago, Ill.,

of Delaware Original application June 14, 398,074, which is a division of No. 77,796, May 4, 1936, 2,296,875, dated September 29, 1942. and this application November 9, 1942 Ili., assignor to Telea corporation 1941, Serial No. application Serial now Patent No. Divided Serial '1 Claims. (01. 191-43) This invention pertains to typ Printing apparatus and particularly to printing mechanism therefor,

This application is a division of copending application Serial No. 398,074 filed June 14, 1941,

' which in turn is a division of application Serial No. 77,796 filed May 4, 1936. Application Serial No. 77,796 has matured into Patent No. 2,296,875 on September 29, 1942.

The principal object of the invention is to embody in a printing apparat features which are conducive to reliable and eilicient operation.

The present invention features a printer having a type wheel provided with a plurality of re-' ciprocable type elements, and a printing mechanism comprising a print hammer for effecting printing from said elements operated by an arm from a striker member having a weighted head and a depending arm which is engaged by a lateral abutment on a cam reciprocated bar.

For a more complete understanding of the invention reference may be had to the following detailed description, taken in conjunction with the accompanying drawings in which,

Fig. 1 is a side elevational view of the receiving and printing mechanism according to the present invention Fig. 2 is a vertical sectional view through the receiving and printing mechanism;

Fig. 3 is an elevational view of a modified print hammer operating mechanism; and

Fig. 4 is a horizontal sectional view showing the printing function performing mechanism.

Having reference to Fig. 1, the base casting I6 removably supports the foundation for a receiving printer comprising a vertically extending frame casting 36 and a frame casting 31 secured to the casting 36. The frame casting 36 extends from front to rear of the base casting I6 and the casting 31 extends transversely thereof. The frame casting 36 has secured thereto bearing blocks 38 which rotatably support a shaft 39, Fig. 2. Shaft 39 has secured thereto a gear II (Figs. 1 and 2) which is driven by a spiral gear 42 (Fig. 2) which is mounted on the rotor shaft of motor (not shown) and constitutes the main driving gear of the receiving printer as well as of the transmitting mechanism. The shaft 39 actuates the selector mechanism of the receiving printer and also the operation performing cams.

The driving gear 42 (Fig. 2) also meshes with a gear 43 which is mounted on a shaft 44 and is operatively connected thereto through a friction clutch 46. Shaft 44 is journalled in a code disc selector mechanism indicated generally by the 55. A Printing hammer reference numeral 41 (Fig. 2) which is removably supported on the frame member 86.

The type wheel shaft ll has a reduced portion ill at the upper end thereof which provides a shoulder I22 (Fig. 2). A hub I22 is journalled on the reduced portion I2I of shaft 44 and is slidable thereon. At its upper end the hub I23 carries a disc I24 to which is secured an annular type wheel frame I26. The frame I26 has slots in radial arrangement equally spaced therearound, and in each of the slots upper ard lower type pallets I21 are slidably disposed. The type pallets I21 are arranged in upper and lower annular rows, one row of which may carry any desired group of characters such as letters and the other of which may carry other characters such as figures and punctuation marks. The type pallets comprise type faces I28 to which are secured thin shanks I28 which extend inwardly and radially of the type wheel structure within the radial slots thereof. The shanks of each annular row of type pallets are notched to receive a garter spring I3I which biases all of the type pallets of an annular row to their innermost positions with the type faces I28 disposed about the peripher'y of the slotted frame I26. An annular ring- I32 is floatingly disposed in the notches in both annular rows of type pallets and prevents the type pallets from accidental displacement from the type wheel structure due to centrifugal force in the event that one of the garter springs I3I should break. At one portion of its periphery, the type wheel structure has no type pallets and at that point the disc I24 and frame I26 are provided with recesses in which is disposed a perpendicular portion. I33 of a type wheel driving arm I34 which is ajustably secured by screws I30 to an arm I which is carried by the type wheel shaft ll at the top thereof in fixed relation to the shaft to be driven thereby. The adjustability between the arms I36 and I36 is angular.

The type wheel structure is slidable longitudinally of the type wheel shaft to bring either of the two rows of type pallets into printing alignment with the printing platen, the shifting of the structure being accomplished by a sliding movement of the hub I23 with respect to the type wheel shaft 44 produced by the shift mechanism described in said application Serial No. 398,074. As the type wheel is shifted, the recesses in which the perpendicular portion I33 of driving arm I34 is disposed slides upon the portion I33 and driving relation between the type wheel shaft and the type wheel is maintained. I36 is pivotally mounted on screws I31 threaded into the, stationary bracket I25 (Fig. 2) and has its head in alignment with the printing position so that it is disposed behind the shank of the type pallet of either of the annular rows of type pallets, depending upon whether the type wheel is in its upper or lower position. The printing hammer I36 has integral therewith a bail portion H9 at the opposite end of which is integrally formed a lever arm lll (Fig, 1) which carries an impact receiving member I38. A limit screw H8 limits the operative movement of lever arm I. The lever arm III is actuated by a striker member to be described later. The operative movement of the print hammer I36 is a sudden clockwise rotation as viewed in Fig. 2, whereby the type pallet which is aligned with the print hammer at the moment is driven outwardly and radially of the type wheel structure into engagement with the printing platen I39. A stop bar I20 mounted on top of the bracket-.125 projects into the path of the hammer I36 and limits the movement thereof.

The operation of the print hammer lever III is effected by an operating cam mounted on the shaft 39 above the gear 4! (Fig. 1). The operating cams are assembled in-fixed relation with respect to each other on a sleeve which is mounted on shaft 39 and which has associated therewith the driven portion of a spring loaded tooth clutch 2| l, the driving portion of which is keyed or staked to shaft 39. A clutch throwout lever 2l2 pivotally mounted on shaft 2i3 is spring biased into engagement with the driven portion of the clutch 2H and has an arm 2 (Fig. 2) disposed in the path of a cam projection 2: included on the selector cam barrel 62. With this arrangement, at a given point in the cycle of operation of the cam barrel 62. cam projection 2H! rocks the arm 2 which withdraws the clutch throwout lever 2i2 from restraining engagement with the driven portion of the clutch 2H and permits driving engagement to be established between the shaft 39 and the cams mounted thereon.

The uppermost of the cams is a channel or box cam designated by the reference numeral 2l6, the cam groove 2" (Figs. 2 and 4) of which receives the follower roller 2| 8 rotatably mounted on a bell crank lever 2l9 rockably mounted on the pivot shaft 22L The bell crank lever 219 is articulated at 222 to a bar 223 to which it is arranged to impart a reciprocatory motion due to the fact that the cam groove 2|! has one offset 224 which, when encountered by the follower roll 2l8, causes the lever M9 to rock counterclockwise upon its mounting shaft HI and in this way the bar 223 is reciprocated rearwardly of the typing unit.

The bar 223 carries intermediate its ends an eccentrically mounted abutment 230 against which abuts the-operating arm 229 of a striker member or hammer 23] pivotally mounted at 232 (Fig. 1). The bar 223 has a depending lug 220, and a tension spring 225 has one end connected to the lug 220 and the other end connected to the operating arm 229 of striker 23l. The striker member 23l is provided at its upper end with a massive head 233 which describes an arc as the hammer 23! is rocked and which delivers a sharp blow to an impact receiving abutment I38 of resilient material, such as rubber or leather, carried by the print hammer operating lever arm 'I I1. As indicated in Fig. 4, the oflset 224 in the groove 2| 1 of cam 2l6 is very abrupt and very 2,352,155 rearmost position is very rapid and thus the blow imparted by the striker member 23] to the print hammer operating lever arm II! is very sharp.

Modified printing mechanism In Fig. 3 there is shown a modified arrangement for operating the printing striker member 23l. In this arrangement, the arm 229 of the striker member 23l, instead of being disposed behind the eccentric abutment 228 as in the previously described arrangement, is disposed ahead of it so that upon the operating stroke of the bar 223, the abutment 228 tends to move away from operating engagement with the striker member short, so that the reciprocation of bar 223 to its .75

23| and upon the return stroke, the abutment 228 operates against arm 229 to restore the striker member 23l to its unoperated position. The bar 223 is provided with lug 46l upon which is pivoted lever 462. The upper arm 463 of lever 462 abuts the foremost surface of striker lever 229 and the lower arm 464 of the lever 482 has connected to it the rearmost end of tension spring 225 which, in the previously described arrangement, was connected to the striker arm 229. The arm 229 of striker 23l is thus between the eccentric abutment 228 and the arm 83 of lever 462. The operation of this arrangement differs from that of the previously described arrangement in that the striker member 23l is operated by the combined action of the operating bar 223 and spring 225 and is restored by action of the abutment 228, whereas in the previously described arrangement, the striker 23l is operated by the bar 223 through abutment 228 and is restored to unoperated position by the tension spring 225. The specific details of the operattion of the arrangement shown in Fig. 3 are as follows: When the operating bar 223 is reciprocated to the right, the abutment 228 tends to move away from the arm 229 of striker 2M and the lever 462 tends to be rotated counterclockwise, increasing the tension of spring 225, both of these actions resulting from the inertia of the relatively heavy striker member 23!, which tends to remain unmoved. When the inertia of that member is overcome, the striker 23! is operated very sharply, due to the energy stored in the spring 225. The striker 23| is positively brought to its idle or rest position upon the return movement of the bar 223,

What is claimed is:

1. In a printing apparatus, a type wheel having a. plurality of reciprocable type elements, a print hammer rockable to strike and reciprocate said type elements, an impact receiving arm for said print hammer, an inertia device having a weighted head for imparting movement to said impact receiving arm, a reciprocable bar for operating said inertia device, and a power driven cam for operating said reciprocable bar.

2. In a printing apparatus, a type wheel having reciprocable type elements, a print hammer for efi'ecting printing from said elements, an operating arm for said print hammer, a striker member for said operating arm having a weighted head and a depending arm, a reciprocable bar having a lateral abutment to engage said depending arm, and an operating cam for said bar.

3. In a printing apparatus, a type wheel having reciprocable type elements, a print hammer for eifecting printing from said type elements. an operating arm for said print hammer, a striker member forsaid operating arm having a weighted head and a depending arm, a reciprocable bar having a fixed abutment and a yieldab'le abutment for controlling said striker member, and an operating cam for imparting movement to said reciprocable ban.

4. In a printing apparatus, a type wheel hav-- ing reciprocable type elements, a print hammer, an operating arm therefor, a striker member for imparting movement to said operating arm having a depending arm, and a reciprocable bar having a yieldable abutment for operating the depending arm of said striker member and having a fixed abutment for restoring the depending arm to normal position.

5. In a printing apparatus, a type wheel having reciprocable type elements, a print hammer i'or efiecting printing from said type element, an operating arm for said print hammer, a striker member for said operating arm having a depending arm, a reciprocable bar, a rotatable abutment carried by said bar for engagement with said depending arm, a spring connected between said abutment and said bar for storing energy for operating said depending arm, and a fixed abutment for restoring said depending arm to normal position.

6. In a printing apparatus, a type wheel having a plurality oi! reciproeable type elements, a print hammer rookable to strike and reciprocate said type elements, means for operating said print hammer, an energy storing and releasin means through which movement is imparted to said means, a reciprocable means for actuating said energy storing and releasing means, and power operated means for operating said reciprocable means.

7. In a printing apparatus, a type wheel having a plurality of reciprocable type elements, a print hammer rockable to strike and reciprocate said type elements, said print hammer comprising an impact receiving arm, an inertia device effective through said arm to operate said print hammer, an energy storing and releasing means through which movement is imparted to said inertia device, a reclprocable means for acutat- 20 ing said energy storing and releasing means, and

power operated, means for operating said reciprocable means.

ALBERT H. REIBER.

cnnmz'cnz. OF comc'rxon.

Patent No. 2,352,155. June 20, 19M].

ALBERT H. REIBER.

It 1.5 hereby certified that error ap aeara in the above numbered patent requiring correction as follows: lathe-heading tq the printed specificatibn,- l1n'o 9,'and page 1, firstcoluinn', line 8, for the patent number 2,296,875 read --2,296,87LL--; and thatthe said Lettera.-Patentahou1d bq' readwiflz this v(solar-autumn thereinrthatthe same niw conform to the m- 0rd at the case in the Patent Off-ice.

Signed ma aea1o d ih 1al2th day of September, A. 1). 191m.

Leslie Frazer (Seal) Acting Comhzisaioziar of Patents.

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