US1283596A - Platen-operating mechanism. - Google Patents

Description

0. THIEME.

I PLATEN OPERATING MECHANISM.

APPLxcATloN FILED MAYIB, 1911.

1,283,596. Patented Nov. 5, 1918..

3 SHEETS-SHEET l.

III

x 205 2da Y n i 208 a D y "Svlt 0. THIEME. PLATEN OPERATING MECHANISM. APPLICATION FILED IIIAYIII. 1911.

Patented Nov. 5, 1918.

0. THIEME. PLATEN OPERATING MECHANISM. APPLICATION FILED IIIAYIa. IsII.

1,288,596. Patented Nov. 5,1913..

3 SHEETS-SHEET 3.

E STA@ OTTO THIEME, or sr. LOUIS, MISSOURI, ASSIGNOR 'ro MOON-HOPKINS BILLING MACHINE COMPANY, or sr. LOUIS, MISSOURI, A CORPORATION or MISSOURI.

PLATEN-OPERATING MECHANSM.

Specication of Letters Patent.-

llatented Nov. 5, 1918.

Application filed May 18, 1917. Serial No. 169,584.

ment in Platen-Operating Mechanism, of

which the following is a full, clear, and exact description, such as will enable others skilled in the art to which it appertains to make and use the same, reference being had to the accompanying drawings, forming part of this specification.

This invention relates to writing machines, and specifically to certain improvements in platen operating mechanism whereby a rotary paper-carrying platen 'may be operatedv in line-spacing movement by automatic means selectively controlled by a key in the keyboard of the machine.

The objects of my invention include the provision of such a mechanism whereby the line-spacing movement of the platen may be performed by a motor employed customarily in other operations of the machine; to provide an arrangement whereby the motor may be rendered effective to perform the line-spacing operation of the platen either automatically upon certain operations of the machine, or consequent upon volitional operation of a key bythe Operator; to provide a mechanism whereby the line-spacing operation may be effected through operation of the motor as many times in immediate succession as may be desired; and to improve generally upon the construction of such mechanisms to the end of providing an arrangement which is comparatively simple, positive and accurate in operation, and free from liability to disorders.

Other and further objectsof my invention will be obvious or pointed out hereinafter, reference being had to the accompanying drawings in which- Figure 1 is a side elevation of parts included in my invention, the same being shown in association with certain parts of the writing machine, some of which are shown in section;

Fig. 2 is a side elevation of another part of the mechanism;

Fig. 3 is a rear elevation of parts shownl in Figs. 1 and 2.

Fig. 4 is a detail of the platen ratchet mechanism.

Referring to these illustrations by the characters of reference applied, it will be understood that the numeral 1 designates generally certain machine 'frame parts which form a support for the operating` mechanism about to be described. Movably mounted on said frame parts is a paper carriagev including the end frames 50 which are joined by suitable longitudinal members 51, and in which is journaled the platen Y shaft 53 carrying a rotary platen which may be of conventional form. The said paper carriage is mounted for lateral movement on bearing members 56, and may carry the conventional manually operable platen rotating mechanism designated generally by the numeral 63..

In suitable association with the machine,

preferably below the table upon which it is' supported, is mounted an l electric motor which is indicated by the character M in Fig.

3. In association with this motor is mountedv a transmission pinion 170 which is constantly rotated from thel motor in the fashion well understood. This pinion drives constantly a clutch shaft 171'having the fixedv clutch member 172 thereon. vFreely mounted On shaft 171 is the slidable clutch member 174 adapted for interengagement with the clutch member 172 under infiuence of spring 175. Clutch member 174: carries a disk cam 17 6 and a wedge member 177, the latter having its active faceextending about part of the circumference of the clutch member, and arranged to exert its effective wedging action in a direction longitudinally of shaft An abutment bar 17 8 is slidably mounted o n a depending portion of the machine frame being urged downwardly by a spring 179. `When in its lowered position, the lower extremity of abutment member 178 lies in the path of the wedging edge of the wedge member 177, and when in engagement with the wedge member at its widest part holds the clutch `member 1711 out of vengagement with the clutch member 172. Ilfhe upward movement of the abutment member 17 8, which disengages the wedge member 177 and permits the engagement of the clutch members, is derived from a line-Spacing key disposed in the keyboard, and whose lever` is indicated at 180. On a shaft 1833 is loosely sisting of an arm 184C conjoined by a shaft 185 to a second arm 186 forms a means whereby rocking movement may be imparted from line-spacing key lever 189 to arm 181. l/Vhen key lever 180 is depressed, arm 181 will be rocked upwardly, raising dog 182;

and as a consequence the abutment member 178. This will release slidable clutch member 174@ and permit its engagement with the running clutch member 172. At the limit of upward movement of arm 181, dog 182 is cammed out of engagement with abutment.

member 178 by virtue of the engagement of said dog with a lug 187. Thereupon, abutu ment member 178 immediately drops downwardly under influence of spring 179, so as to resume its position in the path of the effective edge of the wedge member 177 so that the latter at the end of one revolution,I

by virtue of the wedging action exerted against abutment member 178, will cam the shiftable clutch member 174 out of erfragement with the running clutch member. Upon the release of key lever 180, the dog 182 is restored to engagement with the abutment member 178.

During this revolution of slidable clutch member 17%, the thrust of its cani 176 is rendered el'fective upon, a roller 188 carried on an arm 189 which is pivoted at 19() to a stationary member and at 191 to a connecting rod 192. liflien arm 189 is thus rocked downwardly by the 'action of cam 176, the movement will be imparted by connecting rod 192 to the double bell crank 194 which is pivoted at 195, and whose forward eX- tremity 191a engages a rod 196 which extends the entire lengt-h of the carriage and constitutes a means for swinging a platen rotating lever 197 which is carried by a rock Shaft 198 journaied in the side frames 50.

CoaXiall y pivoted with lever 197 by means of a slot, is a dog 199, which is adapted to operate on the'platen ratchet wheel 200, the said dog having its forward end urged upvardly by a spring 201. Operative connection is made between lever 197 and dog 199 by means of a shift-able connecting member Q02 slidably and pivotally connected to lever 197. by a screw 20% passed through a slot in said connecting member, and by a lug 205 extending laterally over the dog 199 and cngaging at its rear side a lug 20G on the dog, and at its underside, h v means of teeth, a serrated upper edge of lever 197. The lug 205 is held in engagement with the serrated edge of the. lever by the tendency of a spring 207. By virtue of this connection, when the messen lower end of lever 197 is rocked rearwardly e5 by bell crank 19t, dog 199 will be thrown into engagement with the platen, ratchet wheel Q09, and the latter will be rotated. T he extent to which the ratchet wheel is rotated, depends upon the position of dog 199. llhen connecting member :202 is shifted forwardly on lever 197, it will permit dog 199 to move forwardly under the inliuence of its spring Q01. When connecting member Q02 is shifted rearwardly on lever 197, it will move dog 199 rearwardly by virtue of the engagement of lug 205 against lug 206; the farther forward dog 199 is moved, the more teeth. of the ratchet wheel will be comprehended within the scope of its oscillation, and hence the greater will be the movement of the ratchet wheel. A pawl 208 pivoted .on the side frame at 208a and controlled by a lateral projection on dog 199 is swung into position to engage ratchet wheel 200 to prevent overthrow, upon rocking of lever 197.

By virtueiof the structure just described,

it -will be obvious that the rocking of lever 189 by the rotation of cam 176. will cause the line-spacing movement of the platen, and that said operation can take place at any position of the carriage, by virtue of the fact that rod 199 extends the entire length of the carriage, and therefore.l is always in. position for the operative engagement of bell crank arm 19e?. Furthermore it will be seen how the line-spacing ope 'ation is def rived from the motor upon the depression of a key in the keyboard and independently of any other operation of the machine.

rThe mechanism is also adapted for Operation automatically upon certain predetermined operations of the machine/ or associated mechanism. As the means for aceomplishing this automatic: operation, let it be understood that X32 indicates a shaft which is operable from the motor through suitable connections,so that upon certain predetermining operations the shaft 32 may be rocked. or partially rotated. Upon the l shaft X32 is carried an arm Q09 which is swung forwardly upon the operation of the shaft. In the path of the free end of this arm on the bell crank 194 is mounted a spring pressed. stud 210, the same being carried in a yoke member 211 pivoted on a pin 212 and having an offset rear arm 214. A

spring 215 tends to hold the stud/210 projected into the path of the arm 209. This arm has a beveled portion 209a which cams the stud laterally against the spring 215 and` permits the passage of the arm 209 thereby. Upon the return operation of the arm 209, however, the rear face thereof 209b engages the projecting stud 210 and rocks the bell crank 194 to effect the linespaeing move* ment of the platen through the means heretofore described. ln this fashion, the linoine . device 217 whereby it is held in one or the other of its positions. This shaft carries a nger 218 which, when the shaft is thrust inwardly is adapted to engage the rear eX- tension 214e of the yoke 211, and swinging said yoke to retract the stud 210 from the path of the arm 209. The shaft 216 being held in its inward position by,its detent mechanism, the operation of arm 209 upon the line-spacing mechanism will be avoided, so that the platen wil` not be automatically line-spaced upon actuation of the shaft X32.

From the foregoing, it is to be observed that my invention provides a mechanism whereby. the operation of line-spacin g mechanism by the constantly running motor may be controlled with certainty, as each linespacing operation requires a separate depression of the controlling key. Hence, an excessive operation of the line-spacing mechanism, due to the operators inadvertently holding the controlling key depressed, is positively prevented. At the same time, the arrangement permits of a very rapid operation, so that the line-spacing operation'is secured instantaneously upon the depression of the controlling key.

I am aware that my invention may be embodied in a variety of forms differing in many particulars from that herein shownl and described as illustrative, and it is my intention that such variations and modifications are comprehended within the scope o the following claims..

What I claim is:

l. In a typewriting machine in combination, a revoluble platen, a motor, a ratchet device for line-spacing the platen, a cam member eectivel upon the ratchet device, a clutch mechanism for clutching the cam member to the motor, andmanually operative means for rendering the clutch mechanism eifective.

2. In a writing machine, the combination of a laterally movable carriage, a revoluble platen therein, a ratchet mechanism for giving the platen line-spacing movement, a bar extending in the direction of the letter-spacing movement and movable with the c arriage, said bar having operating connection with the ratchet mechanism, a transmission device having operative association with the bar in different lateral positions of the carriage, a motor, and .manually manipulative means for rendering the motor effective upon the transmission device to actuate the ratchet mechanism.

3. In a typewriting machine, the combination of a revoluble platen, line-spacing mechanism for rotating the same, transmission means for imparting movement to said line-spacing mechanism, a motor, a cam member eifectively operable upon the transmission mechanism, a clutch for engaging the cam member for actuation by the motor,

and a manually operable abutment member for governing the engagement of the clutch.

4. In a machine of the class described, a platen-rotating mechanism, a lever having a stationary mounting and arranged 'to actuate said mechanism, a motor, manually operable lmeans for rendering said motor effective upon said lever, a swinging arm operable by the motor, and manually .adjustable means for rendering the movement of said arm effective upon the said lever to operate the platen-rotating mechanism independently of the manually operable means. y

5. In a typewriting machine, the combina- .tion of a laterally movable carriage, a revoluble platen'carried therein, an oscillatory plate mounted on the carriage, a dog `mounted lon said plate and adjustable to varyits extent of oscillatory movement, a.

ratchet whe'el associated with the platen and in coperative disposal to said dog, a bal" carried by the plate and extending longitudinally of the carriage, and means operatively associated with the bar for swinging the same to oscillate the plate.

6. In a writing machine, the combina'- tion of a platen-operating mechanism, a motor normally out. of.operative engagement therewith, means for placing said motor in operative engagement with the mechanism, a controlling member for controlling the operation of said means, manually operable means effectiveupon said `controlling member to accomplish the engagement of the motor 'and platen-operating mechanism, and means for releasing said controlling member from said manually operable mechanism.

7. In a machine of the class described, the combination 0f platenoperating mechanism, a motor disposed for connection therewith, means effective to place said motor in control of said mechanism, a controllin member for governing the operation of sai means, a manipulative member operatively connected with the controlling member and operable thereupon to permit engagement of the motor with the platen-operating mechanism, and means fordisengaging said manipulative 'member from said controlling member upon operationr of the former.

8. In a machine of the class described, the combination of a' rotatable platen, ratchet mechanism for imparting movement to the platen to rotate it, a transmission member operable to act-nate the ratchet mechanism, a motor, a manually operable key and key Leeeee meohenism for rendering seid motor eEecvseid lever, a rotatable cem eieetive upon tive upon seid transmission member, and said rocking erm to swing it to actuate the ineens o arable by seid motor independently lever, a constantly rotating motor eiective of said ey for actuating the transmission to rotate the cam, clutch mechanism for 5 member to eteot rotation of the platen. controlling the operation of the cam by the 15 9. in e writing machine, the combinationA motor, and manually operable means ,for

of e rotatable pinten, line-spacing mechacontrolling the clutch mechanism. nism for rotating the seme, a lever eeotive n testimony whereof 1 hereunto aix my upon seid Ene-spacing mechanism to operate signature this 10th day of May, 1917.

l0 it, a rocking arm operably connected with OTTO THIEME.

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