US2201775A - Typewriting and like machine - Google Patents

Description

May 21, 1940. e. K. HOWLAND El AL TYPEWRITING AND LIKE MACHINE Filed Oct. 5, 1938 3 Sheets-Sheet 1 :hwcmkow GEORGE/(HUWLA/Y/J OTTO E. HULTGREN shim/MM;

May 21, 1940. G. K. HOWLAND ET AL TYPEWHITING- AND LIKE MACHINE Filed Oct. 5, 1938 3 Sheets-Sheet 2 gvwc/Mom GEORGE KHOWLA/VD OTTQ E. HULTGRE/V Slim/mm;

May 21, 1940. cs. K. HOWLAND El AL TYPEWRITING AND LIKE MACHINE Filed 001. 5, 1938 3 Sheets-Sheet 3 'Ym m JV A 6 J D w mw a, EHm MKH R0 5 GO WM 2 2 J 0 I 5 k? 3 4 U 4 4 I v lit) Qateantedl ay 2%,, H94@ are eras pr Fid TYPEWVRHTKNG AND LIKE MACHHNE Application @ctoher 5, rest, Serial No. 233,432

is (Claims.

The present invention relates to typewriting and iike machines and more particularly to means for preventing rebound of the type. bars and associated parts from their normal positions of arrest in the return thereof after each actuathan.

One of the main objects of the invention generally stated is to provide simple and highly ef fective means of the character specified which will offer but little resistance to the actuation of the type actions, thereby affording a light touch on the printing keys.

Another object of the invention is to provide means of the character specified which are substantially noiseless in their operation.

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

A still further object of the invention is to provide an improved anti-rebound means including a latch that is normally positively engaged with a relatively fixed part of the machine and is automatically released on the depression of a printing key before the associated type bar is moved towards the printing position.

To the above and other ends which will hereinafter appear the 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 like reference characters indicate corresponding parts in the different views:

Fig. 1 is a detail, side elevation of a type action embodying the anti-rebound features of the present invention, the parts being shown in a normal position.

Fig. 2 is a corresponding enlarged, fragmentary view of a portion of the same.

Fig. 3 is an enlarged, detail, fragmentary, vertieal, sectional view showing a portion of the structure illustrated in Fig. 2, with the parts in normal position; the section being taken on the line 3-3 of Fig. 6 and looking in the direction of the arrows at said line.

Fig. 4% is a like view of the same showing the parts as they are disposed when the anti-rebound latch is released and before the type bar actuating lever has been operated.

Fig. 5 is a horizontal sectional view of the same parts, the section being taken on the line t -5 of Fig. 3 and looking in the direction of the arrows at said line.

Fig. 6 is a like sectional view taken on the line 6-6 of Fig. 4 and looking in the direction of the arrows at said line.

The invention is shown in the present instance embodied in a type action of a No. 10 Remington Noiseless machine in which the devices of said invention may be readily incorporated without modifying or materially modifying the existing structural features thereof. It should be understood, however, that the invention is not restricted to embodiment in such machines but may be used in typewriting and like machines generally wherever found available.

There is disclosed in the accompanying drawings only a single type action, that being sulficient to arrive at an understanding of the invention in its combination therewith. Such type actions are disclosed in the patent to Going No. 1,573,544 dated Feb. 16, 1926.

In the present instance we have dispensed with the anti-rebound devices disclosed in the Going Patent No. 1,604,640 dated Oct. 26, 1926 which have been employed in the No. 6 and No. 10 Remington Noiseless machines and have substituted therefor the anti-rebound devices of the present invention.

The type actions per se are, or may be, of the usual construction and will first be described.

Referring to Fig. 1, it will be observed that each type bar ill carries four types H, l2, l3 and M and is pivotally supported on guide links l5 and i6. The lower end of the link i6 is pivoted at i! on arm l8 adjustably secured to a supporting bracket 19. The lower end of this link i5 is pivoted at to a bellcrank lever pivoted at 22 to the supporting bracket 69. The other arm of the lever 2| is pivoted to a link 23 which in turn is pivotally connected to a sub-lever 24 pivoted at 25 to the bracket 89.

The actuating means for the type bar in the present instance comprises the usual toggle members 26 and 2f pivotally united at 28. The toggle member 27! is pivoted at 30 to the supporting bracket is.

A second toggle comprises an arm or member 3i and a pivotally connected actuating lever 92, the arm 3i being pivoted at 33 to the member 2! of the first toggle. The lever 32 comprises two matched side members fixedly united and maintained spaced apart and arranged on opposite sides of the bracket i9, as shown in Figs. 5 and 6. A weight or momentum accumulator 34 is in the present instance fixed to and forms an extension of the toggle member The actuating lever 32 is pivoted at 35 on the supporting bracket to and is in the nature of bellcranl: lever having on the substantially horizontally disposed arm thereof a curved contact face This contact face is of suflicient width to coact with the curved contact edge oi. the sublever and also to contact with a curved contact edge of a second corresponding sub-lever The sub-lever 25- has a depending link pivoted thereto which link in turn is pivoted its lower end, as at 39, to a key lever 3d. a like manner 2. depending link 39 constitutes a connec tion between the sub-lever ill and a second key lever 15.

Each iiey lever and it has a 42 connected thereto, Whereas a spring is anchored at one end to the bracket l9 and is con; cted at its other e d to a by which a L -..v-ersal-=bar actua yohe G pivoted to the actuating lever The spring is effective to retu n the lever and the parts connec ed therewi to normal position.

operation of the t me acicn a depression of the key lever G. will actuate the sub-lever causing a straightening of the toggle 2G, at which time the links and it will turn on their respective pivots and it; the ill at this time remaining fixed. The eliect of this is to produce a noiseless pressure imprint from one or another of the types it, depend ing on whether platen l? is the upper or lower case poo ion.

If on the other hand the key lever G5] is depressed then the type bar will be actuated as before except that the actuation of the sub-lever 2 3 will cause the bellcrank Hi to be shifted thereby lowering the pivot 20 and causing the type bar to take a difierent path of travel to print from one of the types ll, l2 depending on the position of the platen.

It will be understood that the disposition of the parts and the curved contact edges of the sub-levers 24 and 3! coacting with the curved contact 36 aiford a varying leverage and high acceleration of the actuating lever 32 and type bar in the printing operation, as is usual in the No. Remington Noiseless machine.

We will now describe the means of the present invention which in the return movement of each type action to normal position will prevent rebound of the parts from such normal position of arrest.

The anti-rebound latch or device 46 of the present invention is preferably in the nature of a bellcrank lever one arm of which has an engaging nose 4'! normally positively engaging a relatively fixed portion of the machine, such as the engaging member 48 on the bracket l9, as best shown in Fig. 3. The latch 46 is pivoted at 49 on the horizontally disposed arm of the type bar actuating lever 32, and between the matched side members thereof, for movement with said lever and for independent movement thereon. The end 46 of the horizontally disposed arm of the latch 46 remains in contact at all times with the curved contact face In prior structures the contact face or member 36 was fixedly connected to the actuating lever 32. In the present structure, however, the member 38 is pivoted to said lever at for a limited independent movement thereon, the pivot 58 passing through bearing openings depending ears 58 on the member 36. Thus, from abor ve a consideration of Figs. 2- and 5 it will be understood that the member 36 overlaps the matched side members of the horizontally disposed arm of the actuating lever and is limited thereby in its independent downward movement from the Fig. 3 to the Fig. 4 position. On the other hand the member 36 is limited in its upward independent movement from the Fig. 4 to the 3 position by a downwardly and forwardly turned end thereon engaging a stop pin 5E which is employed as one of the connecting membars which unite the guide members of the lever A contractile spring 52 is connected at one end to the latch and is connected at its other end to the pivot pin 5C of the member 36. The force of this spring is exerted to move the latch to engaging position and to elevate the member as shown in Fig. 3; it being understood that the upright arm of the latch extends through a slot 36' in the member When in the normal position, the engagement of the latch 6-3 with the bracket at 05 positively locks the lever 32 and the parts connect-ed therewith against rebound from such position. When however, either key lever G6 or 2*. is depressed the corresponding sub-lever or 3'1; will be actuated. The first part of the movement of such sub-lever is effective to bring about an independent movement of the member 36 from the Fig. 3 to the Fig. 4 position, there by first releasing the latch it from engagement with the bracket. [1 further movement of such sub-lever is effective to actuate the lever 3112 the parts connected therewith. The latch 66 will, of course, be retained in its released position until the type action returns to normal position and the actuated sub-lever 2 or 37 releases its pressure on the member 36, as shown in Fig. 3. Then the latch is effective to automatically lock the lever 32 and the parts connected therewith against rebound.

From the foregoing description it will be understood that the member 36 not only constitutes an engaging surface with which the sub-levers 24 and 3'! coact to actuate the lever 32 but also constitutes an automatically operated latch releasing device for releasing the latch 46 from its engagement with the bracket.

In order to limit the movement of the lever 32 and the parts connected therewith to normal r position there is provided on the bracket IS a depending stop projection IS, the end of which preferably engages the member 36 over or forward of its pivot 50. When the parts return to the normal Fig. 3 position the stop l9 arrests the movement of the lever 32 and the parts connected therewith, without however, interfering with the independent movement of the latch releasing device 36 to its normal position. In fact when the stop I9 is located to coact with the member 36 slightly forward of its pivot 50 the returning spring 43 will aid in effecting the independent movement of the member to the Fig. 3 position.

It will be understood that the use of the antirebound latch 66 offers but little additional resistance to the printing operation of the type action; it merely being necessary to overcome the force of the light spring 52, and that only durin the slight movement of the latch from the position shown in Fig. 3 to that shown in Fig. It will be understood moreover, that this slight resistance of the spring takes place at the initial portion of the key depression and before the actuating lever 32 and the parts controlled thereby are set in motion and at a time when the resistance of the returning spring d3 is not exerted against-the key depression. Therefore, a light touch on the keys is provided, especially at the initial portion thereof when such light touch is most desirable.

It will be understood that each type action and its associated anti-rebound means in the machine is such as has been described and that by the use of said anti-rebound means there is an avoidance of collision between difi'erent adjacent and closely arranged type locks during the operation of the machine, which collision is apt to occur in the event that no anti-rebound means are provided.

By our present invention we are enabled to provide simple, inexpensive and effective means for attaining the results pointed out and which means may be incorporated in existing type actions without materially altering the existing structural features thereof.

While we have described in detail one form of anti-rebound means embodying our invention in its cooperation with one form of type action, it

should be understood that various changes may be made without departing from our invention as it is defined in the accompanying claims.

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

1. In a typewriting machine, the combination of a type action comprising a type bar, two printing keys and means controlled thereby for moving said type bar in difierent paths depending on which of the printing keys is actuated; and means for preventing a rebound of the type bar from its position of rest comprising a single normally engaged latch, and automatically operating means controlled by said printing keys during initial movement thereof from normal position for releasing said latch before the type bar is actuated by either of said printing keys.

2. In a typewriting machine, the combination of a type action comprising a type bar, two printing keys and means controlled thereby for moving said type bar in difierent paths depending on which of the printing keys is actuated; and means for preventing a rebound of the type bar from its position of rest comprising a single latch carried by a part of the type action and normally engaging a relatively fixed part of the machine, and automatically operating means controlled by said printing keys during initial movement thereof from normal position for releasing said latch before the type bar is' actuated by either of said printing keys.

3. In a typewriting machine, the combination of a type action including a printing key, a type bar, and a type bar actuating member having an initial lost motion connection with said printing key; and means for preventing a rebound of the type bar from its position of rest comprising a latch carried by said actuating member and normally engaging a relatively fixed part of the machine, a spring acting directly on said latch for bringing the latch into such engagement, and positively operating means controlled by said printing key during initial movement thereof from normal position for releasing said latch from such engagement before the actuating member is actuated by the depression of an associated printing key.

4. in a typewriting machine, the combination of a type action including a printing key, a type bar, and a type bar actuating member; and means for preventing a rebound of the type bar trolled by said printing key for first actuating said releasing member to release the latch and for then actuating said actuating member to move the type bar.

5. In a typewriting machine, the combination of a type action comprising a type bar, two printing keys, and controlling means controlled thereby for moving said type bar in diflerent paths depending on which of the printing keys is actuated, said controlling means comprising a type bar actuating member controlled by both of said printing keys; and means for preventing a rebound of the type bar from its position of rest comprising a single latch carried by said actuat ing member and normally engaging a relatively fixed part of the machine, and automatically operating means controlled by the initial movement of either of said printing keys from normal position for releasing said latch before the type bar is actuated by either of said printing keys.

6. In a typewriting machine, the combination of a type action comprising a type bar, two printing keys, and controlling means controlled thereby for moving said type bar in diflerent paths depending on which of the printing keys is actuated, said controlling means comprising a type bar actuating member controlled by both of said printing keys; and means for preventing a rebound of the type bar from its position of rest comprising a single latch carried by said actuating member and normally engaging a relatively fixed part of the machine, a'latch releasing member carried by and movable on said actuating member and cooperative with said latch to release it, and means controlled by both of said printing keys for first actuating said releasing member to release the latch and for then operating the actuating member to move the type bar.

7. In a typewriting machine, the combination of a type action comprising a type bar, two printing keys, and controlling means controlled thereby for moving said type bar in different paths depending on which of the printing keys is actuated, said controlling means comprising a type bar actuating member controlledby both of said printing keys; and means for preventing a rebound of the type bar from its position of rest comprising a single latch carried by said actuating member and normally engaging a relatively fixed part of the machine, a latch releasing member carried by and movable on said actuating member and cooperative with said latch to release it from such engagement, aspring' cooperative with the latch to bring about its engagement, and means controlled by both of said printing keys for first actuating said releasing member to release the latch and for then operating the actuating member to move the type bar.

8. In a typewriting machine, the combination of a type action including a printing key, a sublever controlled thereby, and a type bar actuating lever actuated by said sub-lever; and means for preventing a rebound of the type bar from its position of rest comprising a latch carried by and movable on said actuating lever, and a. latch releasing device carried by said actuating lever and movable therewith and having an independent movement thereon and with which said sub-lave coacts to first move the releasing device to releas the latch and then to move the releasingclevice and actuating lever to actuate the type bar.

9. in typeivriting machine, the combination of a type action including a printing hey, a sublever controlled thereby, and a type bar actuating lever actuated by said sub-lever; and means for preventing a rebound of the type bar from its position of rest comprising a latch carried by and movable on said actuating lever, a latch releasing device carried by said actuating lever and movable therewith and having an independent movement thereon and with which said sub-lever coacts to first move the releasing device to release the latch and then to move the releasing device and actuating lever to actuate the type bar, and spring means for returning said latch and latch releasing device to normal position on said actuating lever.

10. a typev/riting machine, the combination of a type action including two printing keys, two sub-levers actuated thereby, and a single actuating lever actuated by both of said sub-levers; and means for preventin rebound of the type bar from its position of rest comprising a latch. carried and movable on said actuating lever, and a latch releasing device carried by said actua"ng lever movable therewith having an independent inovement thereon and with which both of said sub-levers coact to first move the releasing device to release the latch and then to move the releasing device and actuating lever to actuate the type bar.

11. In a typewriting machine, the combination of a type action including two printing keys, two sub-levers actuated thereby, a type bar, and a single type bar actuating lever; and means for preventing a rebound of the type bar from its position of rest comprising a latch carried by and movable on said actuating lever, a latch releasing device carried by and limitedly movable on said actuating lever and operable by either of said sub-levers to first release the latch and then move the actuating lever, and spring means for returning said latch and latch releasing device to normal position on said actuating lever.

12. In a typewriting machine, the combination of a type action comprising a printing key, a sublever actuated thereby, a type bar, a type bar actuating lever actuated by said sub-lever, and a bracket on which said type bar, sub-lever and actuating lever are supported; and means for preventing a rebound of the type bar from its position of rest comprising a latch carried by said actuating lever and normally engaging a part of said bracket, and a latch releasing device operable by said sub-lever and successively engageable with said latch and actuating lever to first release said latch and then move the type bar actuating lever.

13. In a typewriting machine, the combination of a type action comprising two printing keys, two sub-levers actuated thereby, a type bar, a type bar actuating lever actuated by said sublevers, and a bracket on which said type bar, sublevers and actuating lever are supported; and means for preventing a rebound oi the type bar from its position of rest comprising a single latch carried by said actuating lever and normally engaging a part of said bracket, and a latch releasing device operable by both of said sub-levers and successively engageable with said latch and actuating lever to first release said latch and then move the type bar actuating lever.

iii. In a typewriting machine, the combination of a type bar, on actuating lever therefor, and a key actuated lever which coacts with said actuating lever; and means for preventing a re-- bound of the type bar from its position'oi' rest com ising a latch p voted on said actuating lever for liiovement therewith and for independent movement thereon, and a latch releasing device pivoted on actuating lever for movement therewith for independent movement thereon, said releasing device being acted on by key actuated lever to first effect independent movement of the releasing device to release said latch and then to move the releasing device and actuating lever together to operate the type bar.

15. In a typewriting machine, the combination oi 'ype bar, an actuating lever therefor, a lte actuated lever which coacts with said actuating lever, and means for preventing a rebound of the type bar from its position of rest comprisa latch pivoted on. said actuating lever for movement therewith and for independent movement thereon, and a latch releasing device pivoted on said actuating lever for movement therewith and for independent movement thereon, said key actuated lever and latch releasing device having curved coacting contact faces or treads which afford a variation in the leverage between the key actuated lever and the type bar actuating lever during the operation thereof.

16. In a typewriting machine, the combination of a type bar, an actuating lever therefor; and two key actuated levers which coact with said actuating lever; and means for preventing a rebound of the type bar from its position of rest comprising a single latch pivoted on said actuating lever for movement therewith and for independent movement thereon, and a latch releasing device pivoted on said actuating lever for movement therewith and for independent movement thereon, said releasing device being acted on by either one or the other of said key actuated levers at will to first effect an independent movement of the releasing device to release said latch and then to move the releasing device and actuating lever together to operate the type bar.

GEORGE K. HOWLAND. OTTO E. HULTGREN.

Images