US1630765A - Noiseless typewriter - Google Patents

Description

y 3 J. A. RUFFIN 'NOISELESS TYPEWRITER Filed'April 11, 1923 In aerator.- QZjln A.Rzgfi n, m 7%? Patented Ma 31, 1927.

JOHN

ALLAN F. RUFFIN EXECUTORS OF SAID JOHN A. RUFFI'N, DECEASED.

NOISELESS TYPEWRITER.

Application filed April 11, 1923. Serial 1%. 631,414.

can be-used. Another object is toprovide such an organization as will be applicable to typewriters of well known makes, such as the Underwood, Remington, and others, without changing the fundamental plan of such-machines or the general plan of their type bar. baskets, it being necessary only.

to substitute my improvement for the type bars in said machines.

Other objects will appear from the following description and the features of novelty will be pointed out in. the appended claims.

In the accompanying draw1ngs:-

Fig. 1 is a side view of a key lever organization like that of the Underwood machine,

with my improvement incorporated therein.

Fig. 2 is a view of the main type bar.

Fig. 3 is a'view of the supplemental lever or resser attachment.

' ig. 4-is an edge view Figs. 5, 6 and 7 are views of the type.

Fig. 8 is a sectional view through the type and the main andsupplemental type bars on the line 8--8 of Fig. 1.

of Fig. 3.

Fig. 9'is a sectional view on line 9-9 of Fig. 1. Y

Figs. 10 and 11 are detalls, the latter figure showing one of the bent key levers 011 to the side of the keyboard. a

In these drawings the finger key lever 1 is of ordinary construction, as is also the associated'parts which are connected with the main type carrying member or bar 2. Instead of this bar carrying fixed thereto, as in standard machines like the Underwood, etc., I mount the type slidabl uponthe upper end of this bar or lever,

whlch, for this purpose, is provided with an v which is slidably mounted a.

opening 3 in block 4. The on this rivets, as shown. I I p This block 4 's made about one-thousandth of an inch'thicker than the type bar so that the type may slide freely in relation to the head of the lever or type bar 2, that type 5 is immediately mounted is, without friction against the sides of the the type rigidly. '19, for the same reason, betweenwall of the opening 3 and the rear faceof block, being connected thereto by I v mental presser lever 9 will strike against the said bar. There, is a light spring posed between the type and the bar 2,this

springbeing shown at 7. Its function is A. nurrmpormnnnnrown, CONNECTICUT; HORACE Enwnnn nurrm AND tov holdthe type in normal position in re-' lation to the type bar 2. lVhile I have shown one form of spring, it is obvious that this may be. changed to other forms. A light. spring may be used here, ofierin little resistance tothe forward movement 0 the type, in relation to the bar.

To the main type bar 2 there is pivoted at 8 .a supplemental lever 9. Thissupplemental lever is of flat metal having an ofi set head portion '10 with a laterally extendmg flange 11 along its front edge which extends across in-rear of the head or upperportion of the main'lever or ,bar 2, so as to press, when operated upon the rear end of the type for making the printing impression. This supplemental lever is piv oted close to the head orfree end otth'e bar or lever 2, making a. short lever armhere, and its long arm 9 extendsalo'ngthe bar 2 towards the pivot of the latter. It

-is provided at its end with an car 12 extending across'the edge of the bar 2, and having riveted thereto a pin which at its other end extends through an ear 13 formed on the rear. edge of the bar 2 and extendinglaterally in respect thereto.

A spring 14 encircles'the pin and bears at its ends against the ears 12 and 13.

f There is a space at 18 between the front edgexof the head of the bar 2 and the rear face of the type, allowing pla .atthis point so that the bar 2 at its upper ont'edge will not strike the type and lmpinge' it upon the platen with a blow, and there is also 1play at t e rear the block 4. 4

.When the key is de bar 2 is swung up rom its substantially horizontal position towards the; platen and when it reaches the position shown in dotted lines in Fig. 1 the ear 12 of the supple-' bar will continue its forward 1z1novement slightly. but, owing to the play between the ressed, the main type, I

slidable type: and said lever 2, the type will not be thrown forcibly against the platen thereby, but there will occur a relative movement between the main' and supplemental levers, resulting in a pressing action of the type against-the platen instead of a blow.

In other words, the forward movement of" .the bar 2 will be partly checked when the supplemental type bar 9 strikes the noiseless.

stop, and it will have some further though retarded movement against the yielding resis'tance of the spring cushion 14 suflicient noise which results rendered sufiic'ient for maximum manifoldmg. The stop as "the compositetype bar is operated forward. This stop being of rubber or other. non-sounding material, it is obvious that there is no noise in taking the blo w of the composite type bar. The forward printing "action of the type is accomplished by the 3 --supplemental or presser lever 9 swinging around its pivot, pressing the type in a horizontal line to. the printing point.

' A stop'pin' 16 on the lever 2 enters a slot 17 in the supplemental lever 9 and limits the separating movement of these levers relative departing from .the underlying to each other. a

The stop 15 may be either of rubber or of other noiseless material, such as leather.

' I do not limit-myself to the mechanism described, as this may be changed without principles of.

the-invention. The drawings and specification are presented as illustrative of oneform in which the invention may be embodied, and -not' as being' restrictive upon the scope of the invention, which is defined by the apdo notlimit myself as the type may be otherwise related to the supplemental lever 9 vto be pressed thereby against the platen.

It will be observed that standard makes of typewriting. machines 'now being made can be rendered. noiseless by using my improved type bar, and standard machinescan be converted into noiseless ones by taking outt-he standard bars and substituting therefor the composite type barsdescribed above.

A metal surface platen can be used with my invention. therebyproducing clearer cut manifold copies than ones made'on rubber covered platens.

15 receives the shock of'the blow,

, operatin p and operated towards composite type bar instead of the ordinary l by to check the rezone;

l. A composite swinging type bar fon I bar pivotally mounted and operated bya keyleVer, a supplemental bar pivoted to the main bar, and having movement relative I. thereto, a type member slidable on the main bar and pressed against the platen by the typewriting machines comprising a main supplemental bar, and a noiseless stop 7 against which the supplemental lever strikes on the forward movement of the type bar,

substantially asdescribed.

2. In combination a swinging type bar fortypewriting machines, a type member carried by said bar andmovable relative thereto, means for retarding the movement of the type member towards the platen, means carried'by the swinging type bar independently of said type-member for moving the type member in relation to the. swingmg type bar and pressing it against the 1 platen and stop means for arresting the movement of the swinging type bar and for operating the said means to perform its pressing action on. the type member,substantially as described. l 3. In combination in type bar actions for typewriting machines, a swinging bar, a key lever for swinging said bar towards the platen, a supplemental bar or lever pivoted with, a noiseless stop fixed tothe frame. of the machine and against which the supplemental lever strikes, type pressed by the supplemental. bar upon the platen, and a spring between the main and supplemental bars which yields in checking the forward movement of the swinging bar and allows the supplemental bar to move in relation to the main bar to press the type upon the platen, substantially as described.

, In a typewritm machine, a type bar, a platen a type slida le on the type bar for printing by pressure in combination with means mounted on the type bar for exerting said pressure, and a stop on the frame for b moved to a position adjacent the platen.

'5. In-combi'nation, chine, a key lever, a bar pivotally mounted the platen by said key a lever ivoted to .the bar near the free end thereo and having its longer arm between said pivotand the pivot'of the bar,'a stop on the frame against which salddonger arm impinges, a spring between the bar and the lever carried thereforward. movement of the bar, butto allowsaid barto have, further movement'after being checked to thereby ever, a type member,

in a typewriting ma- 10b to the bar first mentioned and movable there said means when the type bar is 20 type member upon the platen, and a spring pmges,

secure a relative movement of the lever about its pivot on the bar, said lever in said relative movement pressing the type member upon the platen, substantially as described. 6. In combination, in a typewriting machine, a key lever, a bar pivotally mounted and operated towards the platen by said key lever, a type member, a lever pivoted to the bar near the free end thereof, and having its longer arm between said pivot and the pivot of the bar, a stop on the frame against which said longer arm ima spring between thebar and the lever carried-thereby to check the forward movement of the bar, but to allow said bar to have further movement after being checked to thereby secure a relative movement of the lever about its pivot on the bar, said lever in said relative movement pressing the therewith, a yielding noiseless stop against which the supplemental lever strikes for swinging the supplemental bar or lever in nelation to the main bar, type movably, mounted in the type bar independently 01 said supplemental bar to be pressed by the supplemental bar upon the platen, and means for restraining the free movement of the supplemental bar, substantially as described.

In testimony whereof, I afiizi my signature.

JOHN A. RUFFIN.

the platen, a supplemental bar orlever pivoted to the bar first mentioned and movable

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