US1983099A

US1983099A - Keyboard mechanism

Info

Publication number: US1983099A
Application number: US557937A
Authority: US
Inventors: Charles H Sampson
Original assignee: SAMPSON PERMAGRAPH CO Inc
Current assignee: SAMPSON PERMAGRAPH CO Inc
Priority date: 1929-01-18
Filing date: 1931-08-18
Publication date: 1934-12-04
Anticipated expiration: 1951-12-04

Description

Dec. 4, 1934. c. H. sAMPsoN 1,983,099

KEYBOARD MEGHANI SM Original Filed Jan. 18, 1929 4 Sheets-Sheet 1- IN VEN TOR [HAnLEsh-j/MPJM Dec 4, 1934- c.H. sAMPsoN KEYBOARD MECHNISM original Filed Jan. 18, 1929 4 Sheets-Sheet '2 De- 4, 1934- c. H, sAMPsoN KEYBOARD MECHANISM Original Filed Jan. 18, 1929 4 Sheets-Sheet 3 xvi/ENTOR- /ARL BY Dec. 4, 1934.

C. H. SAMPSON KEYBOARD MEGHANISM Original Filed Jan. 18, 1929 4 Sheets-Sheet 4 [Nl/ENTOR Watented ec. 4, i934 animo me Gharles H. Sampson, Rochester, N. Y., assigner to Sampson Permagraph Go.. inc., Rochter, N. Y., a corporation of New York original application January ra, 192e, sei-iai No. 333,300. Divided and this application August 1e, 1931, serial No. 557.937

s claims. (c1. iev-fia) y provide the means for positioning the type after it has been selected.

These and other objects of this invention will becomemore readily apparent from the detailed description of the invention which follows, reference being had to the accompanying drawings in which Figure 1 is a longitudinal vertical section view ofthe type selecting mechanism.

Figure 2 is a rear elevation of the type selecting mechanism.

' Figure 3 is a horizontal sectional view of the type selecting mechanism.

Figure 4 is a vertical sectional view of the spindle support of the type carrier.

t Figure 5 is a horizontal sectional view of the spindle support, the section being taken on the line 5x-51c of Figure 4. y

Figure 6 is a detail view of one of the selecting pins of the spindle support. i

Figure i is a top plan view of the spindl Support.

Figure 8 is a diagrammatic view of the shift lever mechanism.

Figure 9 is a perspective view showing the cooperation of the type carrier carriage with the justifying member.

In the several figures of the drawings like reference numerals indicate like parts.

The keyboard operated selecting mechanism for ,typewriters and other printing machines forming the subject matter of my present invention is an improvement of the key board selecting mechanism illustrated and described in my prior application Serial No. 333,300 illed January 18, 1929 and is intended rfor use in connection with the printing machine illustrated in that application.

'I'he present 'keyboard selecting mechanism is illustratednin the several figures with forty-one

keys

1, 1, forty of which are arranged in four rows of ten keys in each row. The

levers

2, 2 of these keys are mounted parallel to each other and are pivoted on the common pivot pin 3(10- cated in the rear of the frame of the machine.

. 'I'he keysare arranged so that the rst, second,

`third etc. keysv of the four rows of keys have their levers placed side by side so that the rst four consecutive key levers are those oi the nrst keys of each row. The following four consecutive key levers are those of the second keys of each row. The next four consecutive key levers In are those of the third keys of each row etc. this way the keys and their key levers are grouped into ten successive groups with four levers in each group. These groups of keys and key levers correspond to the ten groups oi types provided on the type carrier 4 as will hereinafter be described.

Each of the key levers is `provided with a depending lug 5 and the lugs of each group of levers are spaced as illustrated in Figure 1 to engage the upper ends of the bell crank levers 6, 7, 8 and 9. These levers are hinged on the pivot pin 10 and their lower ends each engage the front end of one of the sliding cam bars l1, 11 which are mounted in suitable bearings in the frame of the machine parallel to each other. Each key and key lever is thus adapted to transmit its motion thru one of the bell cranks to a sliding cam bar 11.

Each sliding cam bar 11 has at its forward end a depending lug 12 which is connected with the frame of the machine by the springs 13 which normally draw the cam bars to the right in Figure l against the bell crank levers and forces the upper' ends of these bell crank levers against the lugs 5 of the key levers in order to yieldingly hold these levers in their normal inoperative position. In this Way each key bell crank and sliding cam bar is operated against the tension of one of the springs 13 which returns these members to their normal starting position as soon as the key is released.

On the top edge of each of the sliding'cam bars vis a lug 14 which is located in the same position on each bar. These lugs engage the shoulder 15 provided on the frame of the machine when the sliding cam bars are moved endways on the operation of a key and thus limit the movement of each sliding cam bar to a uniform travel.

On the bottom edge of eachof the sliding cam bars 11 is provided a cam lug 16 and on the i 16 thereof are a series of ten pins 18, each of which is supported in a cradle made up of a pair of

bell cranks

19 and 20. The bell cranks are connected and spaced by a sleeve 21 which in turn is pivotedl on the transverse pivot pin 22. Each bell crank shaped cradle is thus mounted to rock on the pivot pin 22 and one end of one of thebell crank levers, making up the cradle, is connected with the frame of the machine by means of a spring 23 to normally hold the pin 18 thereof in contact with the bottom edge of the cam bars.

As illustrated in Figure 2, each bell crank shaped cradle embraces four of the sliding cam bars 11 and the ends of the bell cranks `making up each cradle engage the side of the first and fourth of Athese cam bars of the group of bars which they embrace. 'I'he ten cradles thus embrace ten successive groups of four cam bars 11 as illustrated in Figure 2.

Pivoted on each of the pins 18 of the cradles is an angular link 24 which connects each cradle with a horizontal lever arm 25. The ten lever arms to which the cradles are connected are located on the platform 26 and are mounted to rock on the lugs 27 supported thereon. These lugs are grouped in back of the vertical spindle bearing 29 in which the hollow spindle 30 is mounted to rotate. The spindle bearing comprises a cylindrical sleeve member which is anchored in a suitable hole in the platform 26 and on the sleeve member are provided two

annular fianges

31 and 32 which are located above the platform and are suitably `s ced from each other. Each of these flanges is p ovided with a series of ten holes which are circularly arranged and equally spaced from each other. The holes 33 in the flange 32 are adapted to have the shank of a stop pin 34 slide up and down therein and the holes 33A provided in the flange 31 in line with the holes' 33 and are adapted to have the reduced extension 35 of these pins project thereinto so that as these pins are raised the upper ends thereof are made to project above the flange 32 for a purpose that will presently appear. l

The stop pins 34 are slotted from the bottom to within a short distance of the reduced extensions 35 thereof and in the slotted portions of the stop pins is provided a cross pin 36 which closes the slot in the stop pin and restricts the opening made by the slot in order to receive the free ends of the lever arms 25 and permit them to positively raise and4 lower the stop pins on the rocking motion thereof.

The spindle 30 is supported in the spindle bearing by a pairof antifriction bearings 37 and 37A, one near the upper end and the other near the lower end thereof. Threaded to the lower end of the spindle 30 at a point below the spindle bearing 29 on the under side' of the platform 26 is a small pulley 38 which is driven by an endless belt 39 from the motor which operates the printing machine. On .top of the spindle 30 is carried the selector arm 40, one side of which projects from the spindle 30 substantially radial thereto. The. hub of' this selector arm, which telescopes over the end of the spindle, is provided with a pair of diametrically .placed

keys

41 and 42 which engage suitable slots in the spindle to hold the selector arm keyed thereto. These keys also project into the hollow center of the spindle where they engage the

keyways

43 and 44 of the vertical sliding shaft 45 which carries atl its upper end the tical rowon the carrier.

type carrier 4. The shaft 45 is thus splined to the hollow spindle 30 so as to rotate therewith while permitting an endwse movement therein to raise and lower the type carrier for a purpose that will presently appear.

The types on the type carrier are grouped in ten groups, each of .which is arranged in a ver- Facing the type carrier is. a horizontally moving platen 46 which is normally held spaced from it lto permit a paper sheet 47 to be fed thru between the platen and the type carrier. The face of the platen has substantially the outline of one of the types provided on the ltype carrier and in its horizontal movement forces the paper sheet in contact with the face of the type located opposite to it. By rotating and raising the type carrier, the types of the ten groups of types can thus be individually brought opposite to the face of the platen 46 and have this platen bring the paper in contact with the selected type.

In positioning a type, the rotation of the type carrier is therefore arrested when the group of types containing the particular type is located opposite to the platen. This is done' by Aa stop pin 34 by-the selecting mechanism heretofore described. For example if an impression'is to I be made of the type which is designated on the, rst' key of the top row of keys indicated by reference character 1, this key is depressed and.` thru its lever 2 and bell crank 6 moves the slid-A ing cam bar 11 to the left until a further movef" 1 ment is arrested by the engagement' ofthe lug During Athis move- 14 with the shoulder 15. ment of the sliding cam bar 11 the cam 16 thereof engages the pin- 18 of a predetermined oneof the cradles made up of the bell crank.

levers 19 and 20 and rocks this cradle with the pin 18. The angular link 24, whichhas its lower end connected to this particular pin 18,

transmits this movement of the pin to its lever arm 25 and rocks it so that its free end'raises the stop pin with which it makes engagement.' The reduced upper end of the stop pin thus:

raised, then projects above the annular flange 32 into the pathv of the rotating selector armv 40 as illustrated in Figure 4. When the selector arm then strikes the stop pin a further rotation thereof is arrested and the type vcarrier is held stationary in a position in which the particular type indicated on the depressed key is located,

opposite to the platen 46.

By operating any one of -the keys in one of the groups of i'our keys, the type 4carrier is thus brought to a standstill in the same angular '.130 position and the types on the carriers. are so arranged that in' this position the types of all four of these keys arelocated in the vertical lthree sliding cam bars included in each groupA of four which have a cam have a varying height. The camA bar 11 from which the cam 17 is eliminated -when operated, keeps the type carrier in its original position. The cams 17 of the other three sliding cam bars however are of increasing size so that as theiriparticular sliding bar is'l spindle and adapted to move and project beyond said spindle bearing into the path of said rotat ing selector arm, mea, controlled by said keys for raising said stop p a pointed tip on the end of said stop pins, an angular tip on the end of said selector arm, said angular tipeot said selector arm being adapted to slide over the pointed tip of said stop pins to depress said pins on the release thereof by said operating means.

3. In a key board selecting mechanism including a rotating type carrier mounted on a shaft and a series of operating keys for each of the types on said type carrier, a sliding cam bar operated by each of said operating keys, a series of cradles mounted to rock below said sliding cam bar, a pin carried by each of said cradles and means for yieldingly holding said cradles to have the pins carried by them engage the under side ofa predetermined number of said sliding cam bars, a cam lug provided on the under side of each oi.' said sliding cam bars, means for limiting the movement oi said cam bars on the operation of said keys, said cam lugs on said sliding cam bars operating to engage said pins of said cradles and rock said cradles on the limited movementl thereof, a selector arm rotating with said type carrier' shaft, means for constantly rotating said type carrier shaft and means connected to said cradles to arrest the rotation oi' said type carrier shaft with the type carrier in a predetermined angular position on the operation of one ot said operating keys.

4. In a type selecting mechanism for printing means connecting each of said groupingmemlbers with one oi' said stop pins to cause a stop pin to move into the path'of said selector arml and arrest the rotation of said spindle and type` carrier on the operation of one of a group ofl said sliding cam bars.

5. In a type selecting mechanism for printing machines, the combination o! a rotary type carrier, v'types circumferentially arranged and longitudinally spaced in series on said carrier, means for constantly rotating said carrier, intermit' tently operating means i'or moving said carrier longitudinally, stop means for the rotary -motion o1' said typecarrier to hold one of the cil-J'4 cumferentially spaced types in a predeterminedl angular position, a carriage for said type cari' rier, a series of stop means adapted toe'ngage said carriage'and cooperating with said longitudinal moving means for locating said type' carrier longitudinally and single key operated joint control means for simultaneously controlling both of said stop means to locate one of the series of types of the type carrier in a predetermined position.

CHARLES H.' simpson.-