US2220241A - Typewriting and like machine - Google Patents

Description

Nov. 5, 1940.

H. A. HEINRICH TYPEWRITING AND LIKE MACHINE Filed Sept. 25. 1938 3 Smets-Sheet 1 @www NV 5, A1940- H. A. HEINRICH n TYPEWRITING AND LIKE MACHINE Filed Sept. 26, 1938 3 Sheets-Sheet 2 m n w E RH 0. TA .my Von mm H.

Arrak/vfy Nov. 5, 1940. H. A. HEINRICH TYPEWRITING AND LIKE MACHINE Filed Sept. 26, 1938 Sheets-Sheet 5 w E M WM EY VR WM H Patented N ov. 5, 1940 UNITED STATES PATENT orner-1 o f 2,220,241 l TYPEWBITING AND LIKE MACHINE nem A. Heinrich, Middletown, conn., assigner to Remington Rand Inc., Buffalo, N. Y., a, our..

poration of Delaware Application September 26, 1938, Serial No. 231,625

13 Claims. (Gl. 197-31) erally stated, is to provide simple and highly effective means of the character specied which will oifer Ano resistance' to the actuation of the type actions, thereby aifording a light touch on the printing keys.

Another object of my invention is to provide means of the character specified which are noiselessin their operation.

A further object of my invention is to provide such anti-rebound means which may be readily combined with existing type actions without Inodifying, or materially modifying, the existing -structural features thereof except to include therein features of the present invention as a substitute for the anti-rebound devices previously employed.

To the above and other ends which will hereinafter appear, my invention consists in the features of construction, arrangements of'parts and combinations of devices set forth in the following description and particularly pointed out in the appended claims.

In the accompanying drawings wherein likereference characters indicate corresponding parts in the diierent views:

Fig. 1 is a detail, fragmentary,'side elevation o showing a type action equipped with the antirebound device of my invention, the view showing the parts as they appear in normal position.

Fig. 2 is an enlarged, detail, fragmentary View of a portion of the same showing the parts in side elevation in the normal position.

Fig. 3 is a like View of the same blit' showing the parts in the actuated position.

Fig. 4 is an enlarged, detail, fragmentary, trans'- i maybe used in typewriting and like machines generally, wherever found available.

I have disclosed only a single type action in the accompanying drawings. that being suiiicient to arrive at an understanding of my invention in its combination therewith. Such type actions are disclosed in the patent to Going No. 1,573,544 dated Feb. 16, 1926. o 'i In the present instance I have dispensed with the anti-rebound devices disclosedl in the patent to Going No. 1,604,640 dated Oct. 26,1926. which have been employed in Remington No. 6 and No.

Noiseless machines and have substituted therelo for the anti-rebound vention.

The type actions per se are, or may be, of t he usual construction and will iirst be described. 1 Referring to Fig. 1 it will be observed that each type bar I0 carries four types II, I2, I3'and I4. and is pivotally supported on guide links I5 and I6. The lower end of the link I6 is pivoted at I'I on an arm I8 adjustably secured to a supporting bracket I9. The lower end of this link I5 isfpivoted at to a bellcrank lever 2| pivoted at 22 to the supporting bracket I9. The other arm of the lever 2| is pivoted toar link 23 which in turn is devices ofthe present inpivotally connected to a sub-lever 24 pivoted at to the bracket I9; e The actuating means for the type bar, in the present instance, comprises the usual toggle members 26 and 21 pivotally united at 28. The toggle member 2'I is pivoted at '30 to bracket I9.

A- second toggle comprises an arm orvmember 3| and a pivotally connected actuating lever 32, the arm 3| being pivoted at 33 to the member 21 of the iirst toggle. The lever 32 comprises two matched members xedly united and maintained spaced apart and arranged on opposite sides of the bracket I9, as shown inl Fig. 4. A weight or momentum accumulator 34 is, inthe present instance, nxed to and forms an extension of the toggle member 3|.

The actuating lever 32 is pivoted at 95 on the supporting bracket I9 andis in the nature of a bellcrank lever having on the substantially h orizontally disposed arm thereof a curved contact face 36. 'Ihls contact face is ofsuilicient width the supporting to coact with the curved contact edge of the sublever 24 and also to coact with a curved contact edge of a second corresponding sub-lever 31. The sub-'lever 24 has a depending link 38 pivoted thereto, which link in turn is pivoted at its lower end, as at 39,l to a key lever 4|I. In a like manner a depending link 38a constitutes the -connection between the sub-lever 31 and a second key 1ever 4I.

Each key lever 40 and 4I has a returning spring which a universal-bar actuating-yoke 4l is piv- 5 oted to the actuating lever 32. 'I'he spring 43 is effective to return the lever 32 and the parts connected therewith to normal position. c

In the operation of the type action a depression of the key lever 4I will actuate the sub-lever 31 1o causing a straigh-tening of the toggles 26, 21 at which time thelinks i3 and I8 will turn on their respective pivots 20 and I1; the bellcrank 2| \at this time remaining fixed. The effect of this is to produce a noiseless pressure imprint from one or another of the types I3, I4, depending on whether the platen 48 is in the upper or lower case position.

If on the other hand the key lever 40 is depressed then the type bar will be actuated as be-` fore except that the actuation of the sub-lever 24` will cause the bellcrank 2| to be shifted as shown in Fig. 3, thereby lowering the pivot 20 and causing the typebar to take a different path of travel to print from one of the types II, I2 depending on the position of the platen.

I will now describe the means of my present invention which coact directly with a part of each type action in the return movement'thereof to normal position to prevent rebound of the parts from such normal position of arrest.

An anti-rebound member, angular lever or device 41, preferably made of sheet metal, is mounted to turn on a headed shouldered pivot 48 riveted or otherwise secured to each hanger I9.

As shown in Fig. 4, the hub-like portion 41* of each member 41 is offset laterally from the main body portion thereof and the member as a whole is received between the two matchingsides which go to make up the actuating lever 32. The pivot 48 is rearwardly offset from the main body of the member 41, so that the preponderance of weight of the member is forward of the pivot 48 and tends by gravity to turn the member 41 in an anti-clockwise direction. 'I'he depending arm of 45 the member 41 is provided with a laterally projecting lug or contact 49 that bears against the forward edge of one of thel matching side members that make up the lever 32. The upper edge 50 of the member 41 is curved and when the parts 50' are in normal position as shown in Fig. 2, this curved edge corresponds substantially to an arc taken around 'the pivot 35 of the lever 32 as a center. A pin or.contact, 5I is riveted to one of the matched members which constitute the lever 32 and projects inward therefrom and normally contacts with the curved edge 50.

From the foregoing description, it will be understood that an actuation of the lever 32 by a depression of either key lever 4|), 4I to bring about a printing movement of the associated type bar,

will cause the upright. part-of the lever 32 to move 70 ment with the pin or contact 5I.

After the printing operation and during the return of the type bar and the parts connected therewith to the normal position of arrest, the lever 32 engaging the lug 49 will positively re- 75 turn me member 41 against the force of gravity thereof. When the parts reach the normal position of arrestfthe curved edge 50 of the antirebound device will be forced into engagement 4with the contact Il, thereby exerting a force that is directed lengthwise of the upright arm of the lever 32 against itsvfixed pivot 35, thus preventing a rebound of the lever 32 and the parts controlled thereby. As the 'parts are operated from normal position there is freedom of contact between the curved edge 50 and the pin 5I 10 and the type action is free from obstruction or resistance by the anti-rebound device 41. This is ahihly important factor as the use of the antireboundl mean'sadds nothing whatever to the force requiredto operate the type action, but 15 on the other hand adds the force of gravity of the anti-rebound devicel to assist in the printing, movement of the type bar,- thereby providing a very light touch on the printing keys. Moreover, the anti-rebound device 41 constituting the 20 only means for limiting the return movementof the lever 32 and the parts connected therewith 'there is substantially no noise produced in the arrest thereof and in the operation of the antirebound means, which is another important fac- 25 tor.

It will be observed that the anti-rebound device 41 is in the nature of an angular lever that has -a three-pointA engagement, one point at its pivot 48, a second point between the lug .49 and 30, y

and the contact 5| and the greater therefore will 40.

be the resistance against rebound.

It will be seen moreover, that by causing the lug 49 to engage the lever 32 near the pivot of the latter that a slight movement only of the anti-rebound device is effected and that the con- 45 struction is such that this slight movement is 4all that is required to effectively prevent rebound ofthe type bar and connected parts. By maintaining a constant and direct engagement between the lug 49 and the lever 32 no noise is 50 produced in the operation of the anti-rebound device.

By making the anti-rebound device of a single piece mounted as shown I am enabled to produce at little expense a highly efficient means for pur- 55 poses stated and such means may be readily added to existing type actions without modifying, or materially modifying, the existing structural features thereof.

While I have described in detail one form of 60 anti-rebound means embodying my invention in its cooperation with one' form of type action, it should be understood that various changes may be made without departing from my invention as it is .defined in the accompanying claims. 65

What'I claim as new and desire to secure by Letters Patent is:

1. In a type action, the combination of an actuating member, a support therefor, a returning spring for said actuating member, and antirebound means for `preventing the rebound of said actuating member from the position of arrest in its return movement to normal position, said anti-rebound means comprising a contact on said actuating member, an engaging membei 75 movement thereof to normal position to thus move said engaging member into engagement with said contact and arrest said actuating member.-

2. In a type action, the combination of supporting means, an actuating member mounted on said supporting means, and anti-rebound means for preventing the rebound of said actuating member from the position of arrest in its return movement to normal position, said antirebound means comprising a contact on said actuating member, an engaging member mounted on'said supporting means for upward movement transversely of the direction of movement of said actuating member into engagement with said contact and downward movement by gravity out of engagement therewith, and means actuated by said actuating member in the return movement thereof to normal position to thus move said engaging member into engagement with said Contact.

3. In a type action, the combination of supporting means, an actuating member mountedon said supporting means, and anti-rebound means for preventing the rebound of said actuating member from the position of arrest in its return movement to normal position, said anti-rebound means comprising a contact on said actuating member, an engaging member mounted on said supporting means for movement transversely of the direction of movement of said actuating member into engagement with said contact, and means actuated by said actuating member in the return movement thereof to normal position to 40 thus move said engaging member into engagement with said contact.

4. In a type action, the combination of an actuating member, a support therefor, a returning spring for said actuating member, and anti-rebound means for preventing the rebound of said actuating member from the position of arrest in its return movement to normal position, said anti-rebound means comprising a contact on said actuating member, an engaging member mounted on said support for movement into engagement with said contact and for movement by gravity out of engagement therewith, and means actuated by said actuating member in the return movement thereof to normal position to thus move .55 said engaging member into engagement with said contact and arrest movement of said actuating member under the force of said returning spring.

5. In a type action, the combination of supporting means, an actuating member mounted on 60 said supporting means, and anti-rebound means for preventing the rebound of said actuating member from the position of arrest in its return movement to normal position, said anti-rebound means comprising a contact on said actuating G5 member, an engaging member mounted on said supporting means for movement upward into engagement with said contact and downward by gravity out of engagement therewith, and means actuated by said actuating member in the return 70 movement thereof to normal position to thus move said engaging member into engagement with said contact.

6. The combination of a type action having a key-controlled member, supporting means T5 therefor, a returning spring for said type action,

and anti-rebound means for arresting the return movement of said key-controlled member to normal position comprising a stop on said keycontrolled member, a stop engaging member mounted on said supporting means for movement into engagement with said stop on the key-controlled member and for movement by gravity out of engagement therewith, and means actuated by said key-controlled member in the return thereof to normal position under the force of said returning spring to thus move said stop engaging member into effective engagement. with said stop on the key-controlled member.

7. The combination of a type action having a key-controlled member, supporting means therefor, and anti-rebound means for arresting the return movement of said key-controlled member to normal position comprising a stop on said keycontrolled member, a stop engaging member mounted on said supporting means for movement transversely of the direction of movement of said key-controlled member into engagement with said stop, and means actuated by said key-controlled member for thus moving said stop engaging member into engagement with said stop,

8. The combination of a type action having a key-controlled member, a support therefor, and

anti-rebound means for arresting the return I movement of said key-controlled member to normal position comprising cooperating stops on said key-controlled member and said support, one of said stops being movable transversely of the direction of movement of said key-controlled member and into engagement with the other of said stops, and means actuated by said key-controlled member for thus engaging said stops.

9. The combination of a type action having a key-controlled member, a support therefor, and anti-rebound means for arresting the return movement of said key-controlled member to normal position comprising cooperating stops on said key-controlled member and said support, one of said stops being mounted for movement into engagement with the-other of said stops, and means actuated by said key-controlled member for thus engaging said stops.

10. In a type action including a support and a pivoted member mounted thereon, the combination of a stop on said pivoted member, a stop movable on said support in a direction substantially transversely of the direction of movement of said pivoted member and into engagement with said stop on the pivoted member, and means controlled by the movement of said pivoted member to normal position for thus moving said stop on the support into engagement with said stop on said pivoted member, whereby the return movement of the pivoted member is arrested and the returning force thereof is directed transversely of the pivotal axis of the pivoted member.

11. The combination of a type action including an actuating member and a support therefor, cooperating stops on 'said actuating member and said support, the stop on said support being movable substantially -transversely of the direction of movement of said actuating member and into engagement With the stop on said actuating memberand means actuated by said actuating mem- -ber in the return thereof to normal position to thus move the stop on said support into engagement with the stop on said actuating member.

12. The combination of a type action including an actuating member and a support therefor, cooperating stop means on said actuating member and said support, one of said stop means being movable substantially transversely o! 4the direction of movement of said actuating member and into engagement with the other ot saidl stop means, and means actuated by said actuating member in the return thereof to normal position to thus engage said cooperating stop means.

13. The combination of a type action having a support, a pivoted actuating lever on said support, and anti-rebound means for preventing rebound or said lever in the return movement.

thereof to normal position. said anti-rebound gagement with said stop on the actuating lever. 10

HENRY A. HEINRICH.

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