US1943015A - Typewriting machine - Google Patents

Description

Jan. 9, 1934. G. G. GOING TYPEWRITING MACHINE Filed Oct. 21, 1931 lNVENTOR BYmY WITNESSES ATTORNEY Patented Jan. 9, 1934 TIPEWBITING MACHINE George G. Going, Glenbrook, Com, assignor to Remington Rand Inc. poration of Delaware New York, N. 1., a cor- Application mm 21, 1931. Serial No. 570,110

19 Claims. (or. 191-101) My invention relates to typewriting and like machines and more particularly to means for preventing a false or improper actuation of the carriage escapement under varying conditions of use of the machine.

More specifically stated, it is one of the main objects of the invention to provide means which prevent the operator from holding the space key of the machine depressed while a printing key is being actuated.

A further object of the invention is to provide means which prevent the operator from holding a printing key depressed while the space key is being actuated.

To the above and other endswhich will here inafter 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 0 the appended claims.

- In the accompanying drawing wherein like ref erence characters represent corresponding parts in the different views:-

Fig. 1 is a fragmentary, detail, fore and aft vertical sectional view showing suflicient number of parts of a typewriting machine to illustrate my invention in its embodiment therein.

Fig. 2 is a fragmentary top plan view of a portion of the same.

Fig. 3 is an enlarged detail sectional view of a portion of the structure; the section being taken on the line 33 of Fig. 1 and looking in the direction of the arrows at said line.

I have shown my invention in the present instance embodied in a No. 6 Remington Noiseless machine in which the invention may be readily included without modifying, or materially modifying, the existing structural features of such machine. It should be understood, however, that the invention is not restricted to its use in said machine but may be included in typewriting and like machines generally, wherever found available.

I will first describe existing structural features of the No. 6 Remington Noiseless machine and will afterwards describe the devices of the present invention in their combination therewith.

The usual system of printing keys 1 are carried by key levers 2 fulcrumed at 3, such key levers being returned to normal position by returning springs 4. The key levers are operatively connected in the usual manner to the type bars, not shown. Each type action includes a type bar actuating lever 5 shown in part in Fig. 1. .Each lever 5 carries a member 6 that straddles'a universal bar 7 mounted in the usual manner to move vertically. An arm 8 on the universal bar 7 is pivoted at 9 to an arm 10 fixed on a rock shaft 11 which is angular in cross section. A depending arm 12 fixed on this rock shaftis connected at its lower end to a link 13 that extends fore and aft of the machine. The rear end portion of the link 13 extends freely through an opening in a depending arm 14 of a dog rocker 15. The rear threaded end portion of the link 13 has a nut 16 thereon that constitutes a contact which coacts with the arm 14, and such nut is held in its adjusted position by a lock nut 17.

The dog rocker 15 is pivoted at 18 to a fixed bracket 19 and carries the usual stepping dog 21 and holding dog 20 which coact with an escapement wheel 22. This escapement wheel is operatively connected in the usual manner to a shaft 23 which is in geared connection with the typewriter carriage. 7

From the foregoing description it will be understood that there is no single key lock employed so that each printing key is free for actuation independently of the condition of dip of the remainder of the printing keys and that more than 30 one printing key may be in motion at the same time. An actuation of a printing key 1 will result in operating the associated actuating lever 5. This will result in lowering the universal bar '7 and rocking the dog rocker 15 against the force of its returning spring (not shown) through the intermediate connections 8, 10, 11, 12 and 13. When the dog rocker returns to normal position the escapement wheel will be advanced and permit a letter space movement of the carriage.

The actuation of the escapement by an operation of the space key 24 is brought about through a separate train of connections. Thus, the space key 24 is supported on arms 25 fixed on a rock shaft 26 supported at its ends by pivot screws 27 (Fig. 2) that are received in tapped openings in bracket arms 28 forming part of a fixed casting 29. A returning spring 30 is coiled around the shaft 26 and bears at one 'end against the casting 29. The other end of this spring is turned around a screw 31 by which a collar 32 is held fixed to the shaft 26, thereby providing for an adjustment of the spring 30.

Extending upward and rearward from the shaft 26 is an arm 33 fixed on said shaft. The upper end of this arm is adjustably connected to a rearwardly extending link 34 to enable the latter to be adjusted fore and aft of the machine relatively to the arm 33. In the present instance the adjusting means for connecting the link 34 to the arm 33 consists of an eccentric 35 '(see Fig. 3) seated in an opening in the link 34 and held in its rotatively adjusted position on the arm 33 by a clamping screw 36 received in an unthreaded opening in the arm 33 and firmly held clamped in position by a nut 37. The rear end of the link 84 is pivotally connected at 38 to an actuating member 39 pivoted at 40 on a fixed bracket arm 41. The upper end of the member 39 carries a cam face 42 and a stop finger 43. This cam 42 coacts with an anti-friction roller 44 carried by the dog rocker 15 to rock the latter clockwise against the force'of its returning spring when the link 34 is pulled forward against the force of its returning spring 45. The stop finger 43 coacts with the roller 44 to limit the forward movement of the member 39.

It will be understood, therefore, that the effect of depressing the space key is to move the holding dog 21 out of engagement with the escapement wheel and to bring the stepping dog 20 into engagement with the wheel affording only a partial letter space advance of the carriage. The remaining advance of the carriage to complete its letter space movement does not take place until the space key is released and returns to normal position, thereby enabling the dog rocker to be returned to its normal Fig. 1 position, disengaging the stepping dog 20 from the escapement wheel and bringing the holding dog into the path of the next advancing tooth thereof.

It is the habit of many operators to dwell with a thumb on the space key, holding it depressed while a printing key is being depressed. It will be understood that the effect of this in the machine as thus far described, as well as in most typewriting machines, is to hold the dog rocker by the space key in its actuated position with the normally disengaged dog engaging the escapement wheel and preventing an advance of the carriage. If, therefore, the operator should actuate one or more of the printing keys at this time the carriage would not be advanced at each such printing operation, and the impressions would not in any event be properly spaced and in some instances would be piled up" one on top of another in the event that more than one impression is made.

It is one of the main purposes of the present invention to provide means for overcoming this difiiculty and preventing such a faulty operation of the escapement mechanism as has been indicated above. The means provided for this purpose will now be described.

In the No. 6 Remington Noiseless machine there is provided a second universal bar 46 which underlies all of the printing key levers 2 and is actuated at a depression of any one of them. This universal bar is supported on arms 47 fixed to a rock shaft 48 rectangular in cross section and supported at its ends on pivot screws 49 carried by bracket arms 50 on the casting 29. A link 51 is connected at 52 to one of the arms 4'! and has one end of a returning spring 53 connected thereto; the other end of said spring being anchored to a fixed part. The rock shaft 48 is, or may be, connected by the usual means (not shown) to a ribbon vibrator. It is to actuate the ribbon vibrator that the second universal bar is provided in this machine. While I employ this universal bar 46 in the present instance-in combination with other features of the present invention, it should be understood that the fact that such universal bar happens to be employed in the present construction to actuate the ribbon b or is immaterial so far as the present invention is concerned. So far as this invention is concerned the universal bar 46 need have no other functon than that about to be described.

An angular or bell crank lever 54 is fulcrumed on a pivot screw 55 carried by a bracket 56, supported on an arm 57 of the casting 29. One arm of the lever 54 carries a laterally bent shoe or contact 58 that underlies the universal bar 46. The other, depending, arm of the lever 54 extends forward of a contact device 59 that projects laterally from one side of the link 34. Preferably the contact device 59 is adjustable and is constructed like the eccentric 35, shown in Fig. 3. The side of the eccentric 59 constitutes the contact face with which the depending arm of the bell crank 54 coacts, and the eccentric is held in its rotativelyadjusted position by a binding screw 60. The adjustment of the contact 59 may be made to compensate for the longitudinal adjustment of the link 34 with the aid of the eccentric 35, so that whatever may be the adjustment of said link the bell crank may be made to maintain contact with the universal bar 46 and the contact dev'ce 59. A padded stop 61 is maintained in the path of the universal bar 46 and limits its downward movement.

It will be understood that with the aid of the foregoing construction if the operator should hold the space key 24 depressed, an actuation of a printing key 1 at this time will result in cansing the associated key lever to bear down on the universal bar 48. The effect of this is to rock the lever 54 and cause the link 34 to be shifted rearward, restoring the actuating device 39 to normal position and elevating the space key to its normal position by a positively exerted force that overcomes the pressure being exerted by the operator on the space key. This operation results in the dog rocker returning to normal position to complete the letter spacing cycle and in bringng about a letter space feed of the carriage. Such operation takes place before the actuated printing key has completed its down stroke so that the dog rocker is in position to be actuated about by the return of the space key, as pointed out above.

It sometmes occurs that an operator will dwell on a printing key, and while it is held down will operate the space key. The same faulty operation of the escapement pointed out above will ordinarily result from an operation of this kind, as well as from holding down the space key when a printing key is being operated. However, with the aid of the devices of my present invention such faulty operation cannot take place in either instance supposed. Thus, should the operator actuate the space key while a printing key is held depressed the link 34 will be drawn forward thereby rocking the lever 54 clockwise as the parts appear in Fig. l, and this will result in lifting the depressed key lever 2 and enabling the universal bar 7 to return to normal position. The effect of this is to free the dog rocker and enable it to return to normal position to complete the cycle requred to effect a letter space movement of the carriage.

From the foregoing it will be seen that by the addition of very simple and inexpensive devices to existing machines I provide effective means for positively returning the space key by the depression of any printing key. I believe this to be broadly new and wish to be understood as claiming such means broadly.

It should be understood that various changes may be made in the construction, and certain features thereof may be employed without others, without departing from my invention as it is defined in the accompanying claims,

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

1. In a typewriting or like machine the combination of a carriage, printing keys each tree for actuation independently oi the condition 01 dip of the remainder of said printing keys, a space key, escapement mechanism for the carriage controlledby said keys, and means operative to positively return the space key to normal position by a depression of any of said printing keys.

2. In a typewriting or like machine the combination of a carriage, printing keys each tree for actuation independently of the condition of dip of the remainder of said printing keys, a space key, escapement mechanism for the carriage controlled by said keys, and means operative to positively return the space key to normal position by a depression of any of said printing keys and for positively returning any depressed printing key by a depression of saidspace key.

3. In a typewriting 'or like machine the combination of a carriage, printing keys, a space key, escapement mechanism for the carriage, a universal bar actuated at each operation of a printing key, and means controlled by said universal bar for positively returning the space key to normal position.

4. In a typewriting or like machine the combination of a carriage, printing keys, a space key, escapement mechanism for the carriage, a universal bar actuated at each operation or a printing key, and means controlled by said universal bar for positively returning the space key to normal position and for positively returning said universal bar to normal position by a depression of said space key.

5. In a 'typewriting or like machine the combination of a carriage, printing keys, a space key, escapement mechanism for the carriage, a universal bar actuated by the printing keys, operative actuating connections between said space key and escapement mechanism, and means intermediate said universal bar and actuating connections for positively returningthe space key to normal position by a depression of any of said printing keys. g

6. In a typewriting or like machine the combination of a carriage, printing keys, a space key, escapement. mechanism 101; the carriage, a universal bar actuated by the printing keys, operative actuating connections between said space key and escapement mechanism, and means intermediate said universal bar and actuating connections for positively returning the space key to normal position by a depression of any of said printing keys and for positively returning said universal bar to normal position by a depression of said space key.

7. In a typewriting or like machine the combination of a carriage, printing keys, a space key, escapement mechanism for the carriage, a universal-bar actuated by the printing keys, operative actuating connections between said space key and escapement mechanism, and a lever intermediate said universal bar and actuating connections which transmits an operating movement of said universal bar to said connections and thereby positively returns the space key to normal position by a depression of a printing key.

8. In a typewriting or like machine the combination 01' a carriage, printing keys, a space key. escapement mechanism for the carriage, a universal bar actuated by the printing keys. operative actuating connections between said space key and escapement mechanism, and a lever intermediate said universal bar and actuating connections which transmits an operating movement of said universal bar to said connections and transmits an operating movement from said connections to said universal bar, whereby the depressed space key is positively returned by a depression of a printing key and a depressed printing key is positively returned by a depression oi the space key.

9. The combination of a space key, printing keys each free for actuation independently of the condition of dip or the remainder of said printing keys, and means mr positively returning the space key by a depression of any printing key;

10. The combination ot a space key, printing keys each free for actuation independently of the condition of dip'ot' the remainder of said printing keys, and means for positively returning the space key by a depression of any printing key and for positively returning any depressed printing key by an actuation of the space key.

11. The combination of a space key, printing keys each tree for actuation independently of the condition of dip of the remainder of said printing keys, means for positively returning the space key by a depression or any printing key, and adjustable means for regulating the action of said last mentioned means to accord with the parts with which they coact.

12. The combination of a space key, printing keys each free for actuation independently of the condition of dip of the remainder of said printing keys, a dog rocker, actuating operative connections between said keys and said dog rocker, and means cooperative with said connections for torcing the depressed space key hack to normal position by the pressure exerted on any printing key.

13. The combination 01' a space key, printing keys each free for actuation independently oi the condition of dip of the remainder of said printing keys, a dog rocker, actuating operative connections between said keys and said dog rocker, and means cooperative with said connections for forcing the depressed space key back to normal position by the pressure exerted on'any printing key and for forcing a depressed printing key back to normal position by the pressure exerted on the space key. I

14. The combination of a space key, printing keys, escapement mechanism, intermediate actuating connections between said space key and escapement mechanism including an adjustable member, .a universal bar actuated at each operation of a printing key, and means intermediate said adjustable member and universal bar for returning-the space key to normal position by pressure exerted on any printing key, said last mentioned means including adjustable means that may be set to accord with or compensate for the adjustment of said adjustable member.

15. The combination of a space key, printing keys, escapement mechanism, intermediate actuating connections between said space key and escapement mechanism including a link, means for adjusting said link relatively to the means which actuate it, a universal bar actuated at each operation of a printing key, an angular lever intermediate said link and universal bar and coacting with the latter, and a contact carried by and adjustable on said link and coacting with said angular lever, whereby the depressed space key will be forced back to normal position by said angular lever and universal bar when pressure is exerted on any printing key.

16. The combination oil a space key, printing key levers, escapement mechanism, a universal bar coacting with and actuated by said key levers, actuating operative connections between said space key and escapement mechanism, and a lever coacting with a part of said actuating connections and with said universal bar to eflect a return of the space key to normal position by pressure exerted on any of said key levers.

' 17. The combination oi? a space key, printing key levers, eseapement mechanism, a universal bar 00%ting with and actuated by said key levers,

actuating operative connections between said space key and escapement mechanism, and a lever coacting with a part or said actuating connections and with said universal bar to effect a return of the space key to normal position by pressure exerted on any of said key levers and to return a depressed printing key lever to normal position by pressure exerted on said space key.

18. The combination of printing keys each tree for actuation independently of the condition of dip of the remainder of said printing keys, 9. space key, a dog rocker controlled by said keys, and means for returning said dog rocker to normal position by a depression of a printing key in the event that the dog rocker is held in its actuated position by the depression or the space key.

19. The combination of printing keys each iree for actuation independently of the condition of dip oi the remainder of said printing keys, a space key, a dog rocker controlled by said keys, and means for returning said dog rocker to normal position by a depression of the space key in the event that the dog rocker is held in its actuated position by the depression of a printing key.

GEORGE G. GOING.

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