US1698119A - Typewriting machine - Google Patents

Description

Jan. 8, 1929. 1,698,119

E. E. BARNEY TYPEWRITING MACHINE Filed Dec. 5, 1927 INVENTOR Patented Jan. 8,1922.

EDWIN E. BARNEY, Ol NEW EQCEELLE, NEW' YORK, ASSIGNOR TO REMNVGTON TYP-L' WRITER CGMPANY, `OF SLON, NEVI YORK, A. CORPORATNOF NEX/V YGBK.

TYPEWRETING MACHINE.

Applicationled'Decembcr 3, 1927. Serial No. 237,435.

My invention relates to typewriting and similar machines and it has for its principal object to provide an elastic stop for arresting the carriage, especially when said carriage is drawn back to the right.

My invention consists in an elastic stop lde-V vice of novel construction and the combination and relativeparrangement therewith o" other devices. u

One form of my invention is illustrated in the accompanying drawings'in which Fig. 1 Vis a fragmentary front elevationo'i the upper part of a typewriter with my invention applied thereto. l f

Fig. 2 is a similar view of a portion ofthe lsame but with certain parts removed. 4 Y

Fig. 3 is a view in section on the line 3-3 of Fig. 1 and looking in the direction oft' the arrow. n

Fig. 4 is a section taken partly on the line 4-4 of Fig. 1 and looking` downward .but the section is not exactly a regular section on that line. f

Fig. 5 is a perspective view of the elastic stop piece.

The drawing shows the invention applied to a Remington No. 12 typewriter which being well known is shown in the drawings only enough to illustrate the application ot my improvement thereto.

The main frame ot the machine comprises a top plate 5 mounted on corner posts 6 and having projecting upward therefrom posts or lugs 7 on which are mounted stationary rails 8 which rails bymeans of bearing rollers 10 support the transverse bars 11 oic the carriage truck. v

The margin stop mechanism to which my invention is shown applied is ofthe kind commonly used inthe Remington No. 12 machine, and it is substantially of the construction shown anddescribed inthe patent to George A. Seib, dated July 6,' 1920, No. 1,345,894. On thefront bar 11 of the carriage truck there'is mounted a bar 12 which is toothed along its front edge to cooperate with two margin stops, namely, a left-hand stop 13 and a right-hand stop 14. Each of these stops comprises a block of metal mounted in a well known way and adjustable by means of a ringer piece 15 along the length of the carriage bar to letter space positions determined by pointers 16 cooperating withL a scale 17. The stop pieces have forwardly projecting portions having abrupt stop surfaces 18 adapted to strike against the relativelysta-v tionary stop, the latter consisting oa block 20 supported at themiddle of the machine on the stationary rail 8; This viblock 20 is iiast on a sliding rod 21 adapted to slide a short distance right and left in a barrel 22 secpred kby screws 28 to the front Jface of the rai S. I

The bloclr 20 has an integral lug 24 proi'ecting from its rear face into a cut-out 25.

in the front 'face of the bar 8. As ordinarily constructed in the Remington machine this lug 24 is of less width in a right and letl hand direction than the cut-out 25 so as to allow to the block 20 a limited motion in a right and left-hand direction, its motion being arrested in each direction by the lug 24 striking a wall of the cut-out 25. y

The block 2O has vprojecting downwardy therefrom an arm- 26 which engages 'inra notch'in a sliding device 2Z`mounted under-l neath the rail 8 by lmeans including a screw 28. At its left end the device 27 is bent down and engages in ya notch'in theA upright arm of a bell crank 8O lwhose horizontal 'armv is pivoted to a vertical link 31 which goes down into the base of the machine where it controls i a key lock. A spring acting on this train of mechanism holds the block 20 normally in its right-hand position, but it can be moved a limited distance tothe left by the margin stop 14 to work the key loclr at the end of a line.

My improvement includes a resilient stop or cushioning device flor-the block 20, sai-d lstop in the present instance, and preferably, consisting of a vC-shaped piece of sheet metal 32 secured to the 'front of the bar Yor rail 8. As shown in Figs. 2 and 4 said bar '8 is made on its iront face with a shallow slot which just'fits the left-hand branch or arm of the piece 32, which arm is further-secured in position by a pin 33 passing through Y the piece 32 and into the'rail 8. The piece' 32 ext-ends downward from the pin 33 and curvesV approxi-mately' semi-circularly right- 'ward and upward,'its right-hand end lying 'little to the right of the left-hand edge of the lug 36. The whole construction is such that when the carriage is drawn to the right and the contact surface I8 of the margin stop 13 strikes the block 20the shock of arrest springs the stop piece 32, allowing the lug 36 to move slightly toward the right. The distance toward the right to which this part can spring islimited either by the situation of the shoulder 34 with respect to the piece 32 or by the situation ofthe right-hand wall of the cut-out 25 with relation to the left-hand edge of the lug 36. Obviously the piece 32 cannot spring beyond the shoulder 34 and obviously also the y lng` 24 on the piece 2O cannot move beyond the right-hand wall of the cut-out 25.

`As is well known the carriage of the Itemington machine is arrested at the front of the machine and the escapement mechanism 1s at the back of the machine. If the stop piece 32 had more than a certain amount ofspringing action on the arrest of the carriage it would result in the carriage overthrowing beyond its normalposition to a sucient extent to cause the escapement ratchet wheel to be caught one space too far; This would be produced by a blow due to the sudden arrest of the carriage and the result of it would be that the parts would be under tension and the carriage to allow the stop vpiece 32to spring not more than ten or fifteen one-thousandths of an inch. If the carriage be drawn back violently enough so that the piece 32 would spring fur- -ther than this predetermined amount,y it is positively arrested. The piece 32 is cut into the C-shape shown, so that the stress on it, when it arrests the carriage, comes edgewise of it, thus making it stiff. The stiffness of the spring action of the piece 32 can be regulated by the design of said piece, as will be readily understood. It is essential that the piece be stiii1 enough so that the ordinary return motion of the carriage will spring it a shade short of its maximum amount and no more. It may therefore be called a stiff elastic piece. On account of the fact as above explained that it is not permissible to allow more. than a smallV amount of spring to the elastic stop,v it is obvious that this stop will not entirely prevent all noise due Vto the return of the car-k riage. If the carriage is drawn back very rapidly it will be arrested positively as above explained and a noise will be made correspondingly. But under the ordinary return motion as imparted to these carriages by hand by an ordinary operator the arrest ofthe carriage is considerably softened and the noise of arrest is diminished and is changed in quality from a sharp and penetrating metallic sound to something more in the nature of a dull thud. v

One of the principal advantages of my cushioning means, resides in its extreme sim-V plicity and the ease with whichit can be appliedto the machine.

l/Vhat I claim as new and desire to secure by Letters Patent, is

l. The combination witha carriage and cooperating stops bywhich it is arrested, of a cushioning device associated with yone of said stops and consisting of a stiff elastic C-shaped piece of flat metal held at one end and yielding slightly at-the other.

2. The combination with a carriage and cooperating stops 'by which it is arrested, one of said stops consisting of a sliding device, of a stirelastic C-shapedpiece of metal held atk one end and engaged at the other end between its two branches by said sliding stopV device at one end and engaged at the other end between its branches by said lug and yielding slightly to the shock of arrest of the carriage. Signed at theborough of IVIanhattan, vcity of New York, in thec'ounty of New York andv State of New York, this 2nd day of December, A. D. 1927. l Y

EDWIN E. BARNEY.

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