US1203683A

US1203683A - Type-writing machine.

Info

Publication number: US1203683A
Application number: US84465914A
Authority: US
Inventors: Nils H Anderson
Original assignee: NOISELESS TYPEWRITER CO
Current assignee: NOISELESS TYPEWRITER CO
Priority date: 1914-06-12
Filing date: 1914-06-12
Publication date: 1916-11-07
Anticipated expiration: 1933-11-07

Description

N. H. ANDERSON.

TYPE WRITING MACHWE.

APPLICATION FILED JUNE 12. 1914.

Patented Nov. 7', 1916.

WITNESSES. -6 'Rik 4 A TTORNEY8 NILS H. ANDERSON, OF MIDDLETOWN, CONNECTICUT, ASSIGNOR TO THE NOISELESS TYPEWRITER COMPANY, OF MIDDLETOWN, CONNECTICUT, A CORPORATION OF CONNECTICUT.

TYPE-WRITING MACHINE.

Specification of Letters Patent.

Patented Nov. 7, 1916.

Application filed June 12, 1914 Serial No. 844,659.

same.

This invention relates to typewriting' machines, and with regard to the more specific features thereof, to improvements in the carriage balancing mechanism associated with the carriage shift mechanism.

One of the objects of the-present invention is to provide a simple and practical carriage balancing mechanism whereby a freer acting shift of the carriage is obtained.

Another object is to provide a mechanism of the above character capable of'various,

adjustments of the several working parts to render the mechanism more reliable and efiicient in use and operation.

A further object is to provide a mecha nism of the first above mentioned character in which the parts are so positioned and arranged as to enhance their ease of movement and prevent wear.

Other objects will be in part obvious and in part pointed out hereinafter.

The invention accordingly consists in the features of construction, combinations of elements and arrangement of parts which will be exemplified in the construction hereinafter set forth, and the scope of the application of which will be indicated in the fol lowing claims.

In the accompanying-drawings wherein is shown one of the various possible embodiments of this invention,'Figure 1 is, a plan view of the balancing mechanism with certain parts shown in section to more clearly illustrate their structure; Fig. 2 is an end elevational view partly in section; and Fig. 3 is a diagrammatic view showing the rela-' tive position of the carriage in its upper central and lower shifted positions.

Similar reference characters refer to similar parts throughout the different views of the drawings.

The present'invention will be hereinafter described with relation to its application to the Noiseless Typewriting Machine although it is, of course, to be understood that the various features are applicable to other machines. The Noiseless machine is, as is well known, of the double-shift style in which the carriage preferably occupies a normal intermediate or central position and is shifted upwardly for printing capitals and downwardly for printing figures for example. The type which coact therewith are pressure-operated, or, in other words, print by pressure in contradisti'nc'tion to exerting an impact or blow upon the paper as in other forms of machines. They obtain this result, in part, by having their path of ,travel limited by the type action independently of the position of the platen, and, for this reason, it is desirable to have the platen positioned in a plane in all of its positions parallel to the plane of the faces of the several type on the type carrier. With this general structure in mind, attention is called to Figs. 1 and 2, in which 1 denotes a portion of the frame of the machine. known as the center tie mechanism, which is movable in a fore and aft direction to position the platen properly with respect to the end of the path of travel of the type according to the number of impression sheets carried by the platen. At each side of this member is an upwardly extending bracket 2' in which is trunnioned a shaft 3. This shaft is provided with recesses at each end into which fit hardened steel bushings 4 adapted to be engaged by pointed trunnion screws 5 threaded through the brackets 2.- The relative position of these trunnion screws 5 may be properly regulated and locked in adjusted position by means of lock nuts 6.

shaft by means of taper pins 10, although it may be desired to make the shaft and arms integrally by a single solid dro forging. Passing through the ends 0 these

arms

7 and 8 are bolts 11 and 12 for securing the forward end oflinks 13 and 14 thereto. These links extend rearwardly, as shown more clearly in Fig. 2, and have their rear end pivotally connected by means of trunnion studs 15 to a shift rail 16. At this same point are connected vertically disppsed shift links 17, the lower ends of which are connected with the shifting mechanism. The shift rail 16 is provided with ball-bearing grooves, along which the carriage rail 18 is adapted to travel. This carriage rail supports the carriage and its associated parts, such as the platen roller 19 of any desired style. At the rear of the carriage rail 18 is a pin 20, to which the carriage drive mechanism, indicated by the usual tape 21, is adapted to be connected for moving the carriage in a letter-space direction from right toleft,

Referring now to the diagrammatic view (Fig. 3), it will be noted that when the carriage is shifted upwardly by means ofthe shifting links 17, the arms .7 and 8 swing downwardly about the trunnion screws 5 as a center. The

arms

7 and 8. however, beingof a shorter radius than the links 13 and 14, the latter will have an endwise movement toward the rear of the machine so that their rear ends occupy a position vertically above the normal central. position of the same points. Likewise, when the carriage is shifted downwardly for printing figures, the reverse takes place, and it will be noted that the intermediate, upper and lower shifted positions of the carriage all lie in the same vertical plane. In fact, the carriage may be said to shift in a vertically straight line, as the variations from a straight line vary but a few ten-thousandths of an inch at any point.

The links 13 and 14 have an endwise movement as well as a pivotal movement and they are supported intermediate their ends by channel trunnions 22, which are adapted to turn freely in the sup orting brackets 2. The relative position of these trunnions may be adjusted in and out by means of pointed set screws 23 which are locked in adjusted position by means of a nut 24. Thisadjustment is largely for the purpose of relieving any binding strain which may be exerted adjacent the bolts 11 and 12. The link 13 is provided at a point adjacent the trunnion 22 with a roller 25 having a vertical pivot when the carriage is in normal position, for it' will be seen that the tension exerted by the carriage drive tape 21" is in a direction to urge the link 13 into contact with the adjacent trunnion block 22. Thus, by providing. a roller at this point, a freer endwise movement of the parts is permitted.

As the roller 25 acts as a fulcrum due to the pull of the carriage drive mechanism, ball-bearings 26 are provided at the opposite end between the link 13 and the head of the connecting bolt 11, thus to reduce friction at this point.

The operation of this device is believed to be clear from the above description, and a further discussion thereof is thought to be unnecessary.

The resent invention therefore'co'mprises a simp e and practical mechanism adapted to properly position the carriage with respect to the end of the path of travel of the type; and the parts are capable of ready adjustment and are so positioned and arranged as to permit a free and rapid movement, as

well as to eliminate wear on the parts at their several connections.

-As many changes could be made in the above construction and many apparently widely different embodiments of this invention could be made without departing from the scope thereof, it is intended that all matter contained in the above description or shown in the accompanying drawings shall be interpreted as illustrative and not in a limiting sense.

Having described my invention, what I claim as new'and desire to secure by Letters Patent is:

1. In a typewriting machine, in combination, a fixed part, an arm pivoted. thereon, a movable part, a link pivotally connected therewith, said arm and link having their ends pivotally connected, and ball bearings associated with said pivotal connection, said link acting as a lever and having a rolling fulcrum. I

2. In a typewriting machine,-in combination, a fixed part, an arm pivoted thereon, a movable part, a link pivotally connected therewith, said arm and link having their ends pivotally connected, and ball bearings associated with said pivotal connection, one of said pivotally connected parts acting as a lever and having a rolling fulcrum.

3, In a typewriting machine, in combination, a fixed part, an arm pivotally connected therewith, a movable part, a linkpivotally connected with said movable part and said arm and'being supported intermediate its ends on said first part, said means of. support being a grooved trunnion in which said link has a longitudinal movement, and a roller associated with one of said last-mentioned parts to permit freedom of movement.

4. In a typewriting machine, in combination, a fixed support, adjustable trunnions in said support, adjustable trunnion screws in said support, a shaft supported by said trunnion screws, a shift rail, and linkage'between said shaft and said shift rail, a part of said linkage adapted to have a longitudinal movement in said trunnions as said shift rail is moved.

5. In a typewriting machine, in combination, a relatively fixed support, trunnion screws mounted thereon, a shaft between said screws, arms mounted on said shaft, links pivotally connected with the'ends of said arms and extending rearwardly of the machine, a shift rail to which opposite ends of said links are pivotally connected, and means for shifting said shift rail, said links being adapted to have a longitudinal movement when said shift rail is actuated.

6. In a typewriting machine, in combinasaid links are pivotally connected, means for shifting said shift rail, said links being adapted to have a longitudinal movement when said shift rail is actuated, and adjustable grooved trunnions supporting said links intermediate their ends.

7. In a typewriting machine, in combination, a relatively fixed support, trunnion screws mounted thereon, a shaft between said screws, 1 arms mountedon said shaft, links pivotally connected with the ends of said arms and extending rearwardly ofthe machine, a shift rail to which opposite ends of said links are pivotally connected, means for shifting said shift rail, said links being adapted to have a longitudinal movement when said shift rail is actuated, adjustable grooved trunnions supporting said" links intermediate their ends, and a roller bearing associated With one of said links to-permit freedom of movement as it travels in said trunnion.

8. In a typewriting machine, in combination, a fixed support, a rotatable trunnion mounted therein, a link adapted to move longitudinally insaid trunnion, and means for adjusting said trunnion in a direction transverse to the movement of the link.

9. In a typewriting machine, in combination, a fixed support, a rotatable trunnion mounted therein, a link adapted to move longitudinally in said trunnion,-means for adjusting said trunnion in a direction transverse to the movement'of the link, and -a roller carried by one of said parts to permit freedom of longitudinal movement of said I link.

10. In a typewriting machine, in combination, a fixed support, a rotatable trunnion mounted therein, a link adapted to move longitudinally insaid trunnion, means for adjusting said trunnion in a' direction transverse to the movement of the link, and a roller carried by said link engaging said trunnion.

In testimony whereof I 'afiix my signature, in the presence of two witnesses.

NILS H. ANDERSON.

Witnesses: I

FRANCIS A. Bnaou, EDWARD A. Wmoox.