US1953428A - Typewriting machine - Google Patents

Description

.20 any material change thereto. Y

Patented. Apr. 3, 1934 y 1,953,428

l UNITED STATES Pli'reu'r oel-ice 'TYPEWRITING MACHINE l Lewis C. Myers, Freeport, N. Y., assgnor to Royal Typewriter Company, Inc., New York, N. Y., a corporation of New York Application March 24, 1933, Serial No. 662,581

Y 8 Claims; (Cl. 197-114) l This invention relates to new and useful irnplaten C, is a shelf 7 andpivoted on this shelf is provements in typewriters generally, although the usual manually operable line spacing lever D more particularly to'a noise reducing stop for thev whichincludes an operating arm 8 and an actumanually operable line spacing lever. ating arm 9, the latter being connected by a link Heretofore lthesemanually operable line spac- 10V to an arm carrying a pawl 11 which cooperates 60 ing levers have been spring returned against a with the ratchet wheel 6 in the usual manner to xed metal stop and the impact of the levers effect a line spacing movement to the platen C against the stop has always resulted in considerupon movement of the lever D.l This manually able noise. operable lever D is inthe nature of a bell crank 10' Among the several objects of this invention are and the arm 9 thereof projects in the generalV 65 to provide a metal stop which Vis yieldable under direction of the platen C.' c Depending from the impact by the line spacing lever when the latter is lever D at its angle is a rigidly connected pvot returned to its normal position thereby creating pin 12 which is mounted for oscillations in an a noise reducing stop; to provide such a yieldable opening formed inthe shelf 7. k

15 stop which will be certain in its function and du- A stop lever E which includes alined arms 13 70 rable in operation,andto provide a stop construcand 14, is pivoted intermediate said arms to the tion for the purpose set forth which is simple, under face of the shelf 7 by a pivot pin 15 which cheap to' manufacture,v and capable of being is located between the fulcrum 12 and the end readily applied to commercial machines without plate 5 of the carriage. The longitudinal axis of Y the stop lever E extends lengthwise of the end 75 With these and other objects inview which will plate 5, and the free end of the arm 13 projects more fully appear, the nature ofthe invention will upwardly and terminates in an upwardly extendbe more clearly understood vby following the deingstop 16 adapted for cooperation with the actuscription, the appended claims, and the several ating arm 9 of the manually operable lever D.

25 views illustrated in the accompanying drawing. The free end of the arm 14 of the stop lever E 80 In the drawingzn terminates in an outwardly extending anchor arm Figlue 1 is a top plan View of one end of the 17. An anchor arm 18 is provided with an an-v carriage showing the usual line spacing mechagular recess 19 which ts a correspondingly nism and also showing my improved stop means shaped shoulder on the lower end of the pivot pin for the manually voperable lever of the line spac- 1.2,; Thisv arm 18 is secured to the pivot pin 12 85 ins mechanism. the'view showing the line Spacing by a screw` 20. The arm 18 istnus rigidly secured lever in its normal position, to the bell crank lever D and extends in a direc- Figul'e 2 iS a Somewhat Similar View but ShOWng tion from the pivot pin 12 opposite the actuating the line spacing lever in its operative position, a arm 9.V A coil spring 21 is connected at one end portion of the' carriage shelf being broken away to the anchor arm 17 of the stop lever E and at its 90 t0 better dSelOSe the Step lever, other end to the anchor arm 18 of the manually Figure 3 is an end elevation of the carriage and operable line spacing lever D.A line Spacing mechanism. parts thereof being From the foregoing, it will be observed that I shown in section, have provided a yieldable metal stop for the lever 40 Figure 4 is an enlarged detail lsectional view D; that this stop is pivotallymounted on the shelf 95 Showing the mounting of the lineV spacing lever '7 on which the manually operable lever D is alsok and the yeldable SOD tl'lel'efel, pivoted,'and that a single coil spring 21 connects Figure 5 is a perspective view of the stop lever, the stop lever E with the line spacing lever D. and When the lever D is in its normal position the Figure 6 iS a perspective view of the anchor forward arm 13 of the stop lever E is held in 100 arm. yieldable contact with the end wall 5 of the car- Refelrng' t0 the eeempenying drawing, A riage bythe spring 21 and the spring 21 also designates the frame of atypewriting machine on functions to yieldably retain the arm 9 of the which a carriage Bis mounted in the usual Inanlever D against thestop 16 of said stop lever. ner for line Spacing movements. This carriage when the arm 8 of the lever D is moved toward 105 includes an end Wall 5 and journaled in this end vthe right to actuate the line spacing ratchet wheel wall iS One end 0f a IDtay platen Cl FXed 't0 6, tension is applied to the spring 21 and this tenthe end of the platen adjacent the end plate 5 sion causes the lever-D when released to return is a ratchet wheel 6. Extending outwardly from to its normal position. As soon as the line spacthe upper edge of the end plate 5 adjacent the ing movement has been effected, the lever D is 110 released and the spring 2l willreturnsaid'lever to a position of engagement with the upstanding stop 16 of the stop lever El, the stop 16 of the lever E being slightly moved beyond its normal position in a direction towards the pivot of the lever D by the angled relation between thestop arm 16 and the contacting face of the avm 9 of the lever, thereby tensioning the spring 21 and constituting a yieldable stop for the lever and to also greatly reduce the noise yof impact.

After the above action has taken place the arm 13, under the tension of the spring 21,*returns to its vnormal stopped position against the plate 5 as shown in full lines in Figure 2, the line spacing lever also assuming its normal position as shown in Figure l.

l. In a typewriting machine, the combination with a platen, of a line spacing mechanism therefor including a manually operable lever, a. pivotally mounted stop directly engageable by said lever to limit the return movement of the latter, and a spring connected to the stop and connected to a part of the typewriting machine for yieldably resisting the lever impact against the stop.

2. In a typewriting machine, the combination with a platen, of a line spacing mechanism therefor including a manually operable lever, a pivotally mounted stop directly engageable by said lever'to limit the return movement of the latter, and a single spring directly connecting the lever and the stop for yieldably resisting the lever impact against the stop.

3. In a typewriting machine, the combination with a carriage including an end plate having an outwardly extending shelf, of a rotary platen having one end journaled in said end plate adjacent said shelf, aline spacing mechanism for the platen including a manually operable bell. crank lever fulcrumed at its Vangle on said shelf, a twoarmed lever fulcrumed on said shelf and terminating at one end with an upstanding stop for limiting the return movement of the manually operable lever, and a coil spring connected at one end to the manually operable lever and at its other end to the end of the two-armed lever opposite the stop for yieldably resisting the lever impact against the stop.

4. In a typewriting machine, the combination with a carriage including an end plate having an outwardly extending shelf, of a rotary platen having one end journaled in said end plate adjacent said shelf, a line spacing mechanism for the platen including a manually' operable bell crank lever fulcrumed at its angle on the upper face of said shelf, a two-armed lever fulcrumed on the lower face of said shelf and terminating at one end with an upstanding stop for limiting the return movement of the manuallyoperable lever, and a coil spring connected at one end to the manually operable lever and at its other end to the end of the two-armed lever opposite the stop for yieldably resisting the lever impact against the stop.` v

5. In a typewriting machine, the combination with a carriage including an end plate having an outwardly extending shelf, of a rotary platen having one end journaled insaid end plate adjacent said shelf, a line spacing mechanism for the' platen including a manually operable bellv crank lever fulcrumed at its angle on the upper face of said shelf, said lever including an actuating arm extending towards the platen, a-two-armed lever fulcrumed on the lower face of said shelf and terrninating at one end with an upstanding stop for limiting the return movement `of the manually operable lever, the fulcrum of the two-armed lever being located between the fulcrum of the manually operable lever and the end plate of the carriage, the longitudinal axis of the two-armed lever extending lengthwise of said end plate, the end of the two-armed lever opposite the stop extending outwardly beyond the fulcrum of said lever, and a coil spring connected at one end to the manually operable lever and at its otherend to the outwardly extending end of the two-armed lever opposite the stop for yieldably resisting the lever impact against the stop, the stop end of the two-armed lever being normally in contact with the end plate of the carriage.

6. In a typewriting machine, the combination with a carriage including an end plate having an outwardly extending shelf, of a rotary platen having one end journaled in said-end plate adjacent said shelf, aline spacing mechanism for the platen. including a manually operable bell crank lever fulcrumed at its angle on the upper face of said shelf, said lever including an actuating arm extending towardsthe platen, a two-armed lever fulcrumed on the lower face of said shelf and terminating at one end with an upstanding stop for limiting the return movement of the manually operable lever, the fulcrum of the two-armed lever being located between the fulcrum of the manually operable lever and the end plate of the carriage, .the longitudinal axis of the two-armed lever extending lengthwise of said end plate, the

end of the two-armed lever opposite the stop extending outwardly beyond the fulcrum of said lever, an anchor arm fixed to the manually operable lever and Vprojecting in a direction opposite the actuating arm thereof, and a coil spring connected at one end to the anchor arm of the manually operable lever and at its other end to the outwardly extending end of the two-armed lever opposite the stop for yieldably resisting the lever impact against the stop, the stop end of the two armed lever being normally in contact with the end plate of the carriage.

'1. In a typewriting machine, the combination with a platen, of a line spacing mechanism therekfor including a manually operable lever, a stop lever fulcrumed at a point in spaced relation to the fulcrum of the manually operable lever and having a stop normally spaced from the fulcrum of said manually operable lever but engageable by said manually operable levery and movable towards the fulcrum thereof during return movement of the latter, and a spring connectedto the stop lever for yieldably resisting the lever impact against the stop.

8. In a typewriting machine, the combination with a platen, of a line spacing mechanism there- 1Q

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