US1933833A - Stenotype machine - Google Patents

Description

Nov. 7, 1933. A. F. WESTLUND ET AL STENOTYPE MACHINE 3 Sheet-Sheet 2 Filed July 24, 1930 .r. 1 mm m mu m M m not. 6

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' which are made a part Patented Nov. 7, 1933 UNITED STATES 1,933,833 STENOTYPE MACHINE Albert F.

Indianapolis, Ind.,

Westlund and Shirley D. Murphy,

assignors to Elmer Stout, Indianapolis, Ind. Application July 24, 1930. Serial No. 470,427 1 Claim. (Cl. 19'79) This invention relates to improvements in typewriting machines and more particularly to machines for writing stenographic notes.

An object of the invention is to simplify machines of this character and to provide on the whole a more efficient and accurate and easily operated machine than those heretofore known.

A further and more specific object is to improve the mechanism for writing numerals and the ribbon reversing mechanism.

Referring to the accompanying drawings, hereof and on which similar reference characters indicate similar parts,

Figure 1 is a top plan view of the machine with a part of the casing shown in section,

Figure 2 is a side elevation, in section,

Figure 3 is a section on line 3-3 of Figure 2,

Figure 4, a detail showing the clutch for operating the paper roll on the machine, and

Figure 5 is a view of part of the side opposite to that shown in Figure 2.

In the drawings numeral indicates a casing corresponding to that shown for example in the design patent to W. H. Ebelhard and C. G. Arvidson No. 50,569. Within this casing is suitably mounted a frame 11. Pivotally mounted on a shaft 12 in the lower portion of the frame are the keys 13 having finger portions 14 on their rear ends, such finger portions providing the key board and if desirable they may be suitably lettered to indicate the characters being written.

The forward ends of these keys engage beneath the rear ends of levers 15 which are pivoted in the frame at 16 and which have bars 1'7 pivoted at their rear ends at 18. The bars 17 are carried in a frame 19 which is pivoted on a shaft parallel with the shaft 18 and which may be lifted to move the lower set of characters on the bars 1'7 to strike against the paper roll 20 when these keys are operated.

The bars 1'7 on the forward ends have two sets of characters, the upper set representing, preferably, the letters of the alphabet, with certain omissions of letters not necessary in stenographic writing and the lower set representing numerals and other characters not frequently used.

The frame 19 is shifted by means of a numeral bar 21 through lever mechanism which is pivoted on the side of the frame 11. Such mechanism consists of a lever 22 which is secured to the end of the numeral bar 21 and is pivoted at 23 to the side of the frame 11. An adjustable bar 24 is secured by means of screws 25 to the end of the with parts shown bar 22, a slot 26 being provided in the bar 24 to permit endwise adjustment. Links 27 and 28 connect the end of the bar 24 with the frame 19.

A stop 29 having a cushioning material 30 on its lower end is secured to the side of the frame and limits the upward movement of the forward end of the lever 22 when it is operated. A spring 31 secured at one end to the side of the frame 11 and at its other end to the lever 22 normally holds the rear end of the lever 22 in elevated position. The paper roll 20 is rotatably mounted in brackets 32 which are secured to the side of the frame 11 or which may be made integral with it.

A paper guide roll 33 is mounted in a bracket '70 34, said bracket being tensioned by means of a spring 35 to hold the guide roll 33 against the paper roll 20.' The roll 20 is operated by means of a clutch shown in detail in Figure 4 and consists of an inner portion 36 which is connected with a plate 38 by means of pins operating in holes 3'1. The portion 36 is connected or geared to a ring 39 by means of spring pressed balls 40 which operate in triangular pockets cut in the periphery of the member 36. Springs 41 normally urge the balls 40 toward the small ends of the slots. An ear 42 provides means for connecting the operating mechanism to oscillate the plate 38 to rotate the roll 20 in a clockwise direction, as shown in Figure 2.

A bar 44 has on one end a bracket 45 which bracket is pivoted at 46 to the frame of the machine. Toggle members 47 and 48 are pivoted at 49 to the frame of the machine and at 50 to the ear 42. An adjustable bar 51 is secured to the 0 end of the bracket 45 at one end and at its other end is connected by a link 52 to the toggle 4'7. The key levers 13 normally rest upon or just above the bar 44. When the keys are pressed down the roll 20 is rotated through the mechanism just described.

A ribbon 43 is attached to spools 53 and passes around between the forwardends of the letter bars and the roll 20. The spools are operated by a ratchet wheel 54 which is moved by a dog 55 on the upper end of an arm 56 which is secured to the bar 44, so that each operation of a key will oscillate the arm and move ratchet wheel counter-clockwise as shown in Figure 2. A dog 57 prevents reverse rotation of the ratchet wheel. Ratchet wheel 54 is mounted on the outer end of a shaft 58 which shaft carries a sleeve 59 upon which" are mounted bevel-gears 60 and 61. The gear '60 meshes with bevel gear 62 and gear 61 meshes with bevel gear 63. The gears 62 and 63 are carried on hollow spindles upon the upper end of which are mounted the ribbon spools 53.

On the sleeve 59 are worm threads 69 and 70, these threads being left and right hand threads respectively. Extending down through each of the ribbon spools 53 are pins 71 which engage in the worm on the shaft 58. When so engaged rotation of the shaft will move it axially to shift the bevel gears on the shaft out of engagement with the bevel gear on the ribbon spool and into engagement with the opposite bevel gear on the opposite ribbon spool. The pins 71 are held out of engagement with the worm on the shaft 58 by the ribbon which is wound around the spool, the ribbon engaging a spring leaf '72 positioned in the side of the spool. When the ribbon is unwound from the spool, this spring is allowed to move outward radially to allow the pin to drop down into engagement with the worm. As soon as the spool has been rotated so that the ribbon is wound around it, the leaf spring is pushed inwardly and lifts up on the pin to disengage it from the worm threads on the shaft 58. From this structure it will be seen that as soon as a spool has been emptied the pin drops down and engages the worm on the shaft 58 to shift this shaft to bring bevel gear into engagement with the bevel gear on the empty spool to start rotating this to rewind the ribbon upon it.

Mechanism for manually shifting from one to the other to reverse the travel of the ribbon consists of an extension 65 secured into the end of the shaft 58. This rod may be manually moved endwise. The dog 55 is sufiiciently wide to maintain engagement with the ratchet wheel 54 in either of the extremes to which the shaft 58 may be moved. A friction detent 66 engaging the disk 67 on the shaft 59 holds the shaft in either of the positions to which it is moved, as is shown in the Patent No. 1,252,891 to W. H. Ebelhard and Arvidson.

In machines of this general type heretofore used difficulty has been encountered in that the paper as it left the roll 20 would tend to jam between the periphery of the roll and the casing. In order to prevent this the casing is provided with a curved plate 68 which extends well up near the periphery of the roll 20 so that the paper as it leaves the roll 20 will engage this plate and be caused to travel out of the machine instead of being carried around by the roll.

One important feature of this invention, which distinguishes it from the prior patents, is that the numeral operating lever 22 is positioned outside of the frame. Heretofore this lever bar was positioned within the frame. This interfered with the internal mechanism of the key levers. Another important fact concerning these levers is that they are securely fastened to a trunnion which is journaled in the frame 11. Heretofore these levers have been pivoted to the frame. By having them secured to a shaft which extends through the frame a more rigid construction is possible.

It will be obvious to those skilled in the art that various changes may be made in our device without departing from the spirit of the invention and therefore we do not limit ourselves to what is described in the specification and shown in the drawings, but only as indicated in the appended claim.

Having thus fully described our said invention, what we claim as new and desire to secure by Letters Patent, is:

In a stenotype machine having a casing and a frame mounted therein, a plurality of print bars having symbols cut thereon, a paper roll adapted to receive a sheet of paper against which said symbols engage to impress them thereon, a guide plate positioned beneath said paper roll, a guide roll, keys for operating the said bars and a curved plate on said casing positioned adjacent said paper roll and said guide roll and immediately beneath said guide roll to guide the paper out of the machine, substantially as set forth.

ALBERT F. WESTLUND. SHIRLEY D. MURPHY.

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