US1722954A - Key action for typewriting and other key-operating machines - Google Patents

Description

July 30, 1929; u, DESHA 1,722,954

KEY ACTION Pow TYPEWRITING AND OTHER KEY OPERATING MACHINES Filed March 24, 192.7 4 Sheets-Sheet 1" i '2; Fi i:

July 30, 1929. o. u. DESHA KEY ACTION FOR TYPEWRITING AND OTHER KEY OPERATING MACHINES Filed March 24, 1927 4 Sheets-Sheet 2 V W M 1 July 30, 1929. O DESI-{A 1,722,954

KEY ACTION FOR TYPEWRITING AND OTHER K EY- OFEATING MACHINES.

Filed March 24, 1-927 4 Sheets-Sheet 3 July 30, 1929. u, -1 1,722,954

KEY ACTION FOR TYPEWRITING AND OTHER KEY OPERATING MACHINES Filed March 24, 1927 4 Sheets-Sheet 4 Patented .luly 30, 1929.

tlhll'l'ED STATES ORVILLE TI. DES'EA, (3F FORT CQZZLINS, COLORADO, ASSZGIIOR BESHA TYFELEXVTRUST ESTATE, OF. FORT CGZLINS, COLOR-ADO.

ACTION FOR TYPEWRITIHG 'AND OTHER.KEYOIPERATING MACHINES.

Application filed. March 24, 192?.

My invention relates to hey-action for typewriters and other type and hey operating es, actuating means at all times operaconnecting the type bar and key lever,

tively r moving the type bar to printing point upon the, depression 01' a key lever and meansreversely breaking the said connection after the printing impact of the type bar for the return g the movement necessary to effect the 1 in. If and before the key lever has com- .)leted its movement; and the present application providing means of the character specihed above which in the main is in the nature of another form of structure that may readily be incorporated in certain typewrit ing machines.

The draw'ngs Fi 's. I, II, III and 1V Sheets one and two show my invention embodied in a machine similar to the Remington standard typewriter and in which the invention may be readily incorporated by a slight modification oi structural features of the machine in effectsuch incorporation. Figs. 1, 11, ill and UP sheets three and tour show my invention emhor icd in a machine similar to the Royal stanna d typewriter, a slight change in form of any of t he corresponding parts such is shown by compar ng the two sets of drawings accompanying this application is immaterial and it should be understood also tliiltfihfi invention is. not restricted to use in machines of the above type,but may be em ployed wherever found available.

The desired principle of operation, new mechanical functions, operative expedients, and other objects and advantages are hereinafter desired and are more particularly pointed out in the appending claims. In the accompanying drawing, wherein like reference ch'a iClIQl indicate corresponding parts in the various views.

in the drawings Eignres E and I eac i avertical section of. a typewriting machine, one key-action only being shown in normal posi tion. El g ent views oi'- the lreyunechanism similar to Fig. P the lrcylever being shown in a depressed position and Serial No. 1?8,083.

responding actuating the type bar. ill also key mechani similar 4 the hey lever being shown in a depressed position and the type bar returned to its initial position. Figs. IVA V is a slrel t 15o the key-mechanism tor il in describing the mode operachine shown. It is understood, of cotor the sake of clearness and avoid c: plication of drawings the applicant has or ted to show or describe the iemaii of l; levers and type bars as well as other devices necessary or advisable in tl e complete macame.

in the embodiment in I, and I, 1 indicates the frame of a typewriter-1 indicates the front 1 the rear, having a plate i by paper carriage not shown, 6 indione the usual type-bars carryi c as front end, and having an operative c i1- ncction 8 the rear end, and is arranged to turn on piv t 9 in the form of a segment deposed v rtici lly belov frame face of the plate I hereb providing the type 7 with a compoint A, as the typo-bar 6 turns om the normal horizontal posithe rest on t the segment 11; 12 indicates y ers carrying at the front end 8 he rear end pivoted at 14 to er of the machine, and is kept in its elevated position by return k 5 ported by bar 15, at normal rest the hey -lever bearing against the under side of stop bar 15" above the front part of the keylever 12, in the usual manner.

Key-lever 12 is formed with an upward projection 16 and provides arear s ddle-backer seat 1'? for the trip-link coupling hereinafter described.

I The hey-lever 12 is described as having two incidents of operation, namely: the inside of depression and incident of release. The incident of depression is disclosed by the downward movement of hey-lever 12 from radius to radius C, and the incident of release is disclosed by the movement of l 12 back from radius C to radius B. The t; i bar 6 is described as having two incidents of operation, namely the incident of response and the incident of recoil. The incident of response of type-bar 6 is disclosed by the movement of the type-bar from its initial rest i E to the printing point A, indicated by tormngarc G from pivot 9. The incident-oirecoil of type-bar 6 is uisclosed by pling to be horizontally its movement from its printing point A back to normal rest E. These incidents ofoperation are, of course present in previous typebar actions in so far as the incident of response E to A of the type-bar 6 occurs simultaneously with incident of depression B to G, of key lever 12, and the incident of recoil, A to E, of the type-bar occurs simultaneously with the incident of release, C to B, 01"" the key-lever, but my invention relates to later correlation of incidents of operation of the key-levers with that of the type-bar, in conforming to the operative expedient by which both the incident of response, E to A, of the type-bar and incident of recoil, A to E, occur during the one incident of depression, 13 to C, of the key-lever.

in this case, tl e trip-1i nk coupling peculiarly arranged between the ke -lever and the type bar accon'iplishes this operative expo client the arrangement of said trip-link coupling being the subject matter 01" this application, hereinafter described.

18 indicates one of a series of vibratory levers, corresponding in number with type bars 6 and key levers 12. lntermediately their ends the vibratory levers 18 are pivoted at 19 in a bar 20 extending across the machine. Means operatively connecting the type bar 6 and upper end of vibratory le er 18 may be the usual pin and slot connection 8, 8, Figs. 1, H, and ill or it may be the usual forward pull links 21 Figs. 1, 112111.

22 is a backward draw link and 23 is a thrust link of what is described as a trip link coupling. The backward draw link 22 is pivoted at 25 interinediately of its ends to the lower end of the vibratory lever 18, and the rear end of the upward curved draw link 22 is pivoted at 24 to the rear end of the trip link 28, the forward end of the trip link 23 being: pivoted at 26 to the upward projection 16 of the key lever 12.

The relative normal positions of pivots 24, 25 and 26 are engaged in a line nearly horizontal with the key lever 12 as shown by J J 1V, LIV, disclosing the trip link coulisposed distinguished from being; en gaged perpendicular to the key lever. It will be observed that the backward draw link 22 and the thrust link 23 constituting the trip link coupling operate in a plane above the key lever, disclosing}; the invention to be overslung. Also, it will be noted that LllQ backward drew link and thrust link 23 operate behind the vibratory lever 18 disclosinp, the trip link coupling to be rearwardly engaged.

27 is a return spring; the front end engaging the hole 27 in the forward end of the back ward draw link 22 and the forward end of re turn sprin lV, IV with horizontal 'diametrical vLine J J, from the backward pivot 2 1 to forward border pivot 25 circumscrihes what is termed the actuating plane. The horizontal dianietrical line J J crossing the actuating plane from the backward border pivot 24 to 7 H ward border pivot 20 indicates the no divert tension line and divides the actuating plane into an upper none of response K and a lower zone of reaction L; the upper zone of response K having to do with the response of the type bar (3 from radius E to radius F as the key lever 12 is being depressed tron radius 13 to radius l); and the lower zone of reaction L having to do with the recoil of the t pe bar 6 from the printing point A to radius i l at rest as the key lever 12 is being continually depressed from radius D to radius 0 or" depression. he normal or idle position of the backward draw link 22 operates v r zone 0 iresponse as shown in F l IV, and 1, H Ill, 1 V. necessary C-llilt the backward drawl n the thrust link 23 be relatively major and minor in length, and link 22 be in such form and so engaged in hinge fold fashion so as to pivotal point 26 to oscillate be permit th ween the backward border pivot 24, and the 1n crossing and rerorward border pivot 25 crossing the horizontal divert tension line 5. in this case, tee elements 22 and ii link coupling; are folded during ncidentoi depresison from radius B to us of the key lever 12 simultaneously v. ith the incident of response of the type 6 from radius E to printing point A; and the hinge fold elements 22 and 23 untold during the rcinaind r of depression, raoius D to ra (line C of key lever 12 simultaneously with the recoil oi the type bar 6 from printing point A back to radius The rearsaddle-backed seat 17 provided by the k v lever 12 stops the back 'a d border l and effects operative tension lock of 23 under influence of return spring 2'? as the key lever 12 is being depress-er. 11'0111 rm ins 3 to radms i). This tension lock of 1%. link 28 18 also described as contractive t4. n lock nieanm that while the key lever 1.. 361112 de, rcsseu, the energy required to respond ;he t pe bar 6 effects eontractive H, 11 1' c g- 1. Q r .1 10

PiQSShiG 01 till a iiem pm or LG the oar ward border pivot 2-JL instead of expansive The contra e tension or" torus-'25 link stops its osc: and this link is moved bodily downward with the key lever 12, as shown in Figs. II and II the interior pivot 26 crosses the horizontal divert tension link 53 into the zone of reactionli. Simultaneously with contra-ctive tension lock of trip link .43, the backward draw link 22 operates under expansive tension between the backward border pivot 24 the forward border pivot 25 while the key lever 12 is being depressed from radius l'i to radius D to respond the type bar 6 from radius E toprinting" point A and the expansive tension of link 22 being relaxed while the key lever continues the incident of depression from radius D to radius C and simultaneously with the recoil of the type bar 6 from the printing point A back to radius of rest E.

A change in relative positions of the backward border pivot 2d and the for border pivot 25 brings the interior pivot- 2-6 down within the lower zone of reaction L thereby releasing the contractive tension lock of thrust link The release of contractive tension lock 01 thrust link 23 permits it resume oscillation reversely breaking about the time the type impacts the printing point A. When the trip link coupling reversely breaks in the above manner there being no further obstruction to the recoil of the type bar 6, it immediately recoils from A to E, while the key lever 12 continues its incident of depression from D to C and contacting with stop bar 3%.

The dotted line M indicates the correlative relationship of the border pivot and the interi0rpivot of the actuating plane during; the process of operation, viz: Dotted line M M, Figs. I and I shows where the t-ri-pivotal relationship forms obtuse angle at the interior pivot 26 pointing upward within the upper Zone of response during the normal position and effecting response of the type bar during the depression of the key lever 12. Dotted line M M, Figs. II, II" shows the alignmentof the border pivots and the interior piv- 0t at the time the type completes its re sponse or impact and begins to recoil. Dotted line M M, III and III shows the obtuse angle at the interior pivot 26 formed by the tri-pivotal relationship pointing downward within the zone of reaction as the ty e bar recoils.

22 is an angular trip hammer provided near the front end of the backward draw link moving upward and communicating with the forward edge 18 Figs, II and II of the vibratory lever as means for reversely breaking; said coupling after the printi impact of the type bar for its return to normal position while the key lever remains in depressed position. The underside of the trip hammer 22 communicates with the upper edge. 12 I and I, of key lever 12 thereby restoring the trip link coupling to normal oper ativo position upon release of the key lever.

lever, a pivotal rod for said v rtically disposed vibratory lever intormediately of its ends, means operatively connect-ii the vibratory lever and type bar, a trip li k coupling con'iprising upward curved draw link thrust link at all times operatively connecting said key lever and vibratory lever for moving the type bar to the printing point upon depression of the key lever, means actuating said coupling to return the type bar after printin g impact while the key lever is in dep: l position, means restoring said coupling to normal operative position upon release of the key lever.

2, In combination, a type bar, key I segmental pivot rod therefore, actua ing means at al times operatively connecting; said my lever and type bar comprising a verticaldisposed vibratory lever pivoted intermeliately of its ends, means operatively connectng the vibratory le and type b -r, a trip 'nk coupling comprising a backward draw ink connected to the vibratory lever, a thrust link pivoted to said key lever intermediately of toe ends of the latter connected to said draw linkmoving the type bar to printing point upon depression of the key lever, means reversely brea ring said coupling after p" ing impact of the type bar, 1? i the type bar to normal position while lw Y lever is in depressed position, means restorino' said coupling to normal operative position upon release of the key lever.

In a key-action for a typewriting machine, a type bar, a segmental pivot rod therefore, a key lever, actuating means at all times connecting said key lever and type bar comprising a vertically disposed vibratory lever, means operative-1y connecting; the vibratory lever and type bar, a backward draw link operatively connected to said vibratory lever, a thrust link operatively connecting the backward draw link and key lever movi a the type bar to printin point upon depression of the key lever, means reversely breakingsaid coupling after printing impact of the latter for return of the type bar to normal position while key lever is in depressed position, means restoring said coupling; to normal operative position upon release of the key lever.

4. In a key action for key-operating machines, a key lever, a type bar, a backwa draw link, a vertically disposed vibratory lever connected to the backward draw link,

ieans operatively connecting the vibratory lever and type bar, a thrust link connected. to

the key lever, a backward border pivot connecting said thrust link and draw link, a saddle-backed seat provided by the top of the rey lever for said backward border pivot, said elements moving the type bar to printing point upon depression oi key lever, means tripping said backward border pivotal point out of the saddle-backed seat reversely break-- ing said coupling after printing impact of the type bar for returning the type bar to normal position while key lever is in depressed position, means restoring said tor-- ward border pivotal point to the saddlebacked seat upon release of said key lever.

5. In a type key action, a type bar, a key lever having an upward projection intermediately of its ends, actuating means at all times operatively connecting said key lever and type bar comprising a verticall 1 disposed vibratory lever, means operatively connecting the vibratory lever and and type bar, a trip link coupling comprising a backward draw link and a thrust link pivoted to said upward projection provided by the key lever moving the type bar to printing point upon depression of the key lever, means reversely breaking said coupling aiter printing impact of the type bar, means for the return of the type bar to normal position while key lever is in depressed position, means restoring said coupling to normal operative position upon release of the key lever.

6. in a type key mechanism, a type bar, a key lever, an upward projection provided by the key lever, a saddle-backed seat in the rear of said upward projection, actuating means at all times connecting said type bar and key lever comprising a backward draw link, a vertically disposed vibratory lever pivotedly connected to the upward curved draw link, means operatively connecting the vibratory lever and type bar, a thrust link pivoted to the upward projection of the key lever and riding the saddle-backed seat moving the type bar to the printing point upon depression of the key lever, means reversely breaking said coupling after printing impact of said type bar, means returning the type bar to normal position while key lever is in de pressed position.

7. In a type key action mechanism, a key lever, a type bar, actuating means at all times operatively connecting the key lever and type bar comprising a backward draw link, a vertically disposed vibratory lever extending upwardly and downwardly from its pivot and connecting said draw link, means operatively connecting the vibratory lever and type bar, a thrust link connecting said backward draw link and key lever moving bodily downward with said key lever upon depression of the latter responding the type bar to printing point, means limiting the downward movement of the backward end of said thrust link reversely breaking said coupling after the printing impact of the type bar for return ing the latter to normal position while key lever is in depressed position, means for restoring the thrust link to normal operative position upon release of the key lever.

8. In a type key mechanism, a type bar, a rey lever, an upward projection thereof, actuating means at all times operatively connecting said key lever and type bar comprising a vertically disposed vibratory lever, means operatively connecting the vibratory lever and type bar, a trip link coupling horizontally disposed and engaged above the key lever backwardly of said vibratory lever, and compressing a backward draw link and thrust link, a backward border pivot connecting the backward draw link and the thrust link above the key lever, a forward border pivot connecting the backward draw link and the vertically disposed vibratory lever above the key lever, an interior pivot connecting the forward end of the thrust link and upward projection of the key lever, said elements moving the type bar to printing point upon depression of key lever, means reversely breaking said elements after the printing impact of the type bar returning the type bar to normal position while key lever is in depressed position, means restoring said elements to normal operative position upon release of the key lever.

9. in a typewriting machine, a type bar,

a key lever, an upward projection thereof, actuating means at all times operatively connecting said type bar and key lever comprisin a vertically disposed vibratory lever, means operatively connecting the vibratory lever and tyge bar, a trip link coupling comprising a relatively long backward draw link and a relatively short thrust link pivoted to the upward projection of the key lever and normally operating within a lower concavity of said draw link moving the type bar to the printing point upon depression or the key lever, means tripping said thrust link out of the concavity of said backward draw link reversely breaking said coupling after the printing impact of the type bar for returning the type bar to normal position while the key lever is in depressed position, means restoring said thrust link to its normal operative position within the lower concavity of said backward draw link upon release oi the key lever.

10. In a key action for a typewriting machine, a type bar, a key lever with an upward projection intermediately of its ends, actuating means at all times operatively connecting the key lever and type bar comprising a vertically disposed vibratory lever, means operatively connecting the vibratory lever and type bar, a backward draw link, and a thrust link moving the type bar to printing point upon depression of the key lever, a backwardly extended fulcrum trip nose provided by the backward end of the backward draw link, a saddle-backed seat provided by the key lever in the rear of the upward projection of the latter coo erating with said fulcrum trip nose reversely breaking said coupling after the printing impact of the type bar, means restoring said coupling to normal operative position upon release of the key lever.

11. In a typewriting machine, a type bar, a key lever, actuating means at all times operatively connecting the type bar and the key lever comprising a vertically disposed vibratory lever, means operatively connecting the vibratory lever and type bar, a thrust link pivoted to the key lever, a backward draw link pivoted intermediately of its ends to the lower end of said vibrator lever and its backward end pivoted to the backward end of said thrust link moving the type bar to printing point upon depression of the key lever, a trip hammer provided by the forward end of the draw link communicating with the forward edge of the vibratory lever reversely breaking said coupling after printing impact of the type bar returning the latter to normal position while the key lever is in d pressed position, the underside of said trip hammer communicating with the key lever restoring said coupling to normal operative posit-ion upon the release of the key lever.

12. In a recoil mechanism for a type key, a type bar, a key lever, actuating means at all times operatively connecting the key lever and the type bar comprising a vertically disposed vibratory lever, means operatively connecting the vibratory link and ty1e bar, a backward draw link, a thrust link moving the type bar to printing point upon depression of the key lever, means reversely breaking said coupling after the printing impact or the type bar, a return spring supported by the forward end of the backward draw link and a bar in the front of the machine returning the type bar to normal position while key lever is in depressed position, means restoring said mechanism to normal operative position upon release of the key lever.

13, In a mechanical movement for a typewriting machine key, a key lever, a type bar, elements connecting said key lever and type bar comprising a vertically disposed vibratory lever, means operatively connecting the vibratory lever and type bar, a trip link coupling composed of a backward draw link and a thrust link, normal operative position or" the elements of said coupling being folded mo the type bar to printing point upon depression of tne key lever, elements or" said coupling unfolding reversely breaking said connection after the printing impact of the type bar returning the latter to normal position while key lever is in depressed posit-ion, means restoring the elements of said coupling to normally folded position upon the release of the key lever.

Signed at Fort Collins, in the county of Larimer and State of Colorado, this 1st day of December, A. D. 1926.

ORVILLE U. DESHA.

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