US676177A - Type-writing machine. - Google Patents

Description

No. 676,I77. Patentgdlune u, 190:. r

J. com. I 'I'YPE- WRITING MACHINE.

(Application filed Mar. 11 1901. (No llodaL) 2 Sheets-Sheet I.

FIG. I.

WITNESSES: INVENTEIR':

I 5W H15 ATTORNEY "m: wings mans cow. mo'rulrua. WASHINGTON, n, c.

No. 676,|77. Patented lune ll, I90I.

J" CORR.

TYPE WRITING MACHINE.

(Application filed Mar. 11, 1901.) (No Model.) 2 Sheets-Sheet 2.

WITNESEEE; INVENTEIR= fiw Shah/L v HEATTURNEY W nonms wsrcns co. mom-Limo" WASHINGTON. n. C.-

UNITED STATES PATENT OFFICE.

JAMES CORR, OF JERSEY CITY, NEWV JERSEY, ASSIGNOR TO UNION TYPE- WRITER COMPANY, OF SAME PLACE.

TYPE-WRITING MACHINE.

SPECIFICATION forming part of Letters Patent No. 676,177, dated June 11, 1901.

Application filed March 11, 1901. Serial No. 50,645. (No model.)

To aZZ whom it may concern.-

Be it known that I, JAMES CORR, a citizen of the United States, and a resident of Jersey City, in the county of Hudson and State of New Jersey, have invented certain new and useful Improvements in Type-Writing Machines, of which the following is a specification.

This application relates to the type-actions 1c of writing-machines.

The principal objects ofmy invention are to improve the touch of the keys, to cause the types to make powerful impressions upon the paper, and to enable the machine to be operi5 ated at high speed without danger of collision of the type-bars.

The invention consists in certain combina tions of devices, features of construction, and arrangements of parts, all as will be herein- 2o afterfully described, and particularly pointed out in the concluding claims.

In the accompanying drawings, Figure 1 is a vertical section taken longitudinally of a type-writing machine embodying my improvements. Fig. 2 is a perspective view of a bellcrank. Fig. 3 is a fragmentary view showing the normal-relation between a key-lever and its associated bell-crank. Fig. 4 is a skeleton view similar to Fig. l, but showing the parts imprinting position.

In the several views similar parts are desi gnated by similar characters of reference.

Certain portions of the machine areomitted for the sake of clearness. 5 The framework ofthe machine comprises a rectangular base 1, corner-post 2, and top plate 3. Across the latter a platen 4 moves longitudinally in the usual manner. Rearwardly-striking type-bars 5 are pivoted at their rear ends upon a curved fulcrum-wire 6, which is seated in a slot 7, formed in a segment 8, the latter being radially slotted at 9 to receive the hubs of the type-bars and being supported upon the framework of the machine in any suitable manner. Each typebar is provided with a returning-spring 10, one end of which books into a hole 11, formed in the lower edge of a curved plate 12, the latter being secured by screws 13 to a seg- 5o mental type rest 14, supported upon the framework. The type-bars are connected by rearwardly extending links 15 to the upwardly-directed arms 16 of a series of belllevers,which are detachably pivoted by means of forks 17 at their lower ends upon a fixed fulcrum-rod 18, which extends transversely beneath a series of key-levers 19. These levers are of the second order, having at their forward ends keys 20 and being fulcrumed at their rearends upon a transverse bar 21, up against which they are pressed by returning-springs 22. It will be seen that the key levers extend rearwardly beneath the typebars and that the bell-levers are arranged forwardly of the key-lever 'fulcrums. Each '65 bell-lever has a rearwardly-directed operat-' ing-arm 23, which extends longitudinally of its associated key-lever 19 and which along its lower edge is bent laterally at 24 to form a bearing rim or ledge, which occupies a po- '70 sition beneath the key-lever,so that the lower edge of the key-lever may work thereon. It will be seen that these bell-levers or sublevers are interposed between the key-levers, so that each arm 23 lies side by side with its associated key-lever. The arms 23 may, taken by themselves, be regarded as sublevers fulcrumed upon the bar 18 and may be otherwise connected to the type-bars, although retaining its ledge 24. When a key- 20 is depressed, its lever 19 is vibrated downwardly upon the fulcrum 21 and by bearing down upon the ledge 24 causes the bell-lever to vibrate rearwardly upon its fulcrum 18, and hence through the link 15 85,- swings the type-bar up to print. It will be seen that the ledge 24 extends longitudinally of the key-lever l9 and lies between the fulcruins 18 and 21, and when in normal position the rear end of said ledge or the point 2,

thereof most remote from the fulcrum 18 and nearest to the fulcrum 21 is in contact with the lever 19. The ledge 21 is slightly curved or crowned, so that during the vibration of the lever 19 the working point or point of contact 9 5 gradually rolls or creeps forwardly away from the fulcrum 21 and toward the fulcrum 18,

as may be seen at Fig. 1, until at the completion of the printing stroke the key-lever bears upon the foremost end of said bearing-ledge- 10o that is, at the point nearest the fulcrum 18 and most remote from the fulcrum 21, as at 5'5Cthe letter-feeding movements of the platen 4, I

Fig. 4:. Atthe'begin'ning of the stroke, owing to the nearne's'sof the working point a to the stroke, and a minimum resistance is" felt at,

the keyupon contact of the finger therewith. As the key descends the levers vibrate, and the contact-point between the lovers gradually recedes from the fulcrum 21 and ap-. a

proaches the fulcrum 18, so that the leverage of the key upon the type-bar gradually decreases without causing a shock to the finger? of the operator. When the type-bar has reached a point midway between normal and printing positions, the key has made about threes-fourths of its dow nstroke, as indicatedat F1 1, the leverage of the key upon the a bar being at thistime much less than at 1 20 me beginning of the stroke.

maihd er' ofthestroke the speed of the typeis 'g-reatly accelerated, and the resistance ff by thetype-bar to the key reaches its ma mum, the working point being at this F t. Thegradual'decrease in the leverage 'tomhe key upon the type-bar serves to cushiorr thestroke or minimize the jar upon the th lrl outtupon the platen or the paper thereon. When the key is relieved from pressure, the are returned to normal position by the sp s 1 0 and 22. It will be seen at Fig. 1 that thetype-bar returns half-way to normal position while the key is making only about one-fourthof its upstroke, so th-atth'e danlger ofcoll i-d-i-ng with a subsequen-tly-operated chineinayhence be operated at high speed without trouble from this source. It will be observed that the bell-lever is vibrated in one direction by its key-lever and in the'o-ther direction by its connected spring 10.

I As usuaheach key-lever operates a u niversal bar 25, which extends transversely bethekey-l'ever system and i-s'supported hooks 26-, which hang from a dog-rocker preview with a returning-spring 2 9 ate an esc-apement-wheel 32 to govern as us al.-

V *atio-n s may be made in construction arrangement without departing from the gist of my invention.

by Letters Patent, is v I; In a front-strike writing-machine, the corn inatio-n with a platen, of a series of rearwardlystriking type-bars,a series of bell-le- 6=5 verseonnected thereto, and a series of keybear'ing levers, each bell-lever having an arm which extends longitudinally of its associated During the re- Wee-t1 claim as new, and desire to secure key-lever and upon which the-- key-Fever operates at successive points so' as to decrease the leverage of the key upon the type-bar during its printing stroke. 7

2. In a front-strike writing-machine, the combination with a platen, of a series of rear 1 wardly-striking type-bars, a series of bell-levers operatively connected thereto, and a series of key-1e vers, each of said bell-levers having an arm which extends longitudinally of bears, the point of contact between the keylever and said arm creeping gradually along said curved surface during the printing 'stroke, so as to decrease the leverage of the key upon the type-bar. I Y I 3. In a front-strike 'wri ti-ng-n'ra rine, the

combination with a platen of a sei 'ies -ofrear wardly-s-triking type-bars, a series of hel l le- Vers operatively connectedthereto' and havand fnlcrumed at their rear ends in rear of ost remote from the fulcrum 21 and gst the fulcrum 18, as indicated at 1),;

said bell-levers, each bell-loverhavingarearot the printing stroke, thebeari ng-poin t of said key-lever moving tor'ward ly during the of the operator at the finish of the key- 11 stre e, while owing to its accelerated speed type bar is enabled to deliver a sharp I 'combinatio-n with a platen, of a series of rearwardly-striking type-bars, a series of rearwardly-eXtendi-ng' key-levers of the second i order, a series of bell-levers fu-lorumed on a j bar which extends transverselybeneath said key-levers and forwardly of thekey l*e=verf'u lcr u-ms, said bell-levers being connectedto the type-bars and having arms which extend rear- 'type'-har is practically avoided, and the mawardly along the key-levers, and having surpoint of contact between the key-levers and said arms shifting forward ly duringthepriht- 1 ing strokes so as to decrease the leverage of the keys upon the type-bars.

5. In a type-Writing machine, the combinaftion with a platen, of a series of type-bars, a

series of key-levers, and a series of su-blevers connected to the type-bars, each snblever being arranged alongside of its key-lever and having an offset bearing portion with which .a working edge of the key-lever contacts at printing stroke.

6. In a type-writing machine, thecomhinw .tion with a platen, of aseries of type-bars, a

series-of key levers, and a series of subl'evers connected to the type-bars, each sub-lever being arranged alongside of its key-lever and having an olfset curved bearing sur-face ex tending longitudinally of the key-lever and upon which a working edge of the keylever bears at successive points was todecrease the leverage of the key upon the type-bar during the printing stroke.

too

7. In a type-writing machine, the combination with a platen, of a series of type-bars, a series of key-levers, and a series of sublevers connected to the type-bars, each sublever having a curved ledge portion which extends longitudinally of its associated key-lever and upon which the key-lever bears at successive points so as to gradually decrease the leverage of the key upon the type-bar during the printing stroke.

8. In a type-Writing machine, the combination with a platen, of a series of type-bars, a series of levers having keys at their forward ends and fulcrumed at their rear ends,a series of sublevers connected to the type-bars and arranged between the key-levers, each sublever having at its lower edge a curved ledge upon which the lower edge of the key-lever bears at successive points, so as to gradually decrease the leverage of the key upon the typebar during the printing stroke.

9. In a front-strike writing-machine, the combination with a platen, of a series of rearwardly-striking type-bars, a series of keybearing levers, and a series of bell-levers connected to the type-bars, each bell-lever having an arm which extends alongside of its associated key-lever, and each of said arms having an ofl'set portion upon which the working edge of said key-lever bears at successive points, so as to decrease the leverage of the key upon the type-bar during the printing stroke.

10. Ina front-strike writing-machine, the combination with a platen, of a series of rearwardly-striking type-balsa series of key-levers, and a series of bell-levers which cross the key-levers, each bell-lever having a ledge or rim upon which an edge of the key-lever bears at successive points, so as to decrease the leverage of the key upon the type-bar d uring the printing stroke.

11. In a front-strike writing-machine, the combination with a platen, of a series of rearwardly-striking type-bars, a series of key-levers extending rearwardly beneath the typebars and fulcrumed at their rear ends, a series of bell-levers fulcruined upon a bar which extends transversely beneath the key-levers, said bell-levers having both upwardly-directed arms and arms which extend longitudinally of the key-levers, and the latter arms having curved ledges upon which the lower edges of the key-levers work, the contactpoints between the keylevers and ledges changing during the printing strokes so as to decrease the leverage of the keys upon the type-bars.

12. In a front-strike writing-machine, the combination with a platen, of a series of rearwardly-striking type-bars, a series of key-levers extending rearwardly beneath the type bars and fulcrumed at their rear ends, a series of bell-levers fulcrumed upon a bar which extends transversely beneath the key-levers, said bell-levers having both upwardly-directed arms and arms which extend longitudinally of the key-levers, and the latter arms having curved ledges upon which the lower edges of the key-levers work, the contact points between the key-levers and ledges creeping during the printing strokes, so as to decrease the leverage of the keys upon the type-bars, springs. 22 for returning the keylevers, and springs 10 for returning the typebars and bell-levers. V

13. In a front-strike writing-machine, the combination with a platen and a series of rearwardly-striking type-bars, of'a series of keylevers, a series of bell-levers connected to the type-bars, and a series of springs for returning the bell-levers to normal position, each bell-lever having an arm which extends longitudinally of its associated key-lever and upon which the key-lever bears at successive points, so as to decrease the leverage of the key upon the type-bar during the printing stroke, the bell-lever being vibrated in one direction by the key-lever and in the other direction by its spring.

14. In a front-strike writing-machine, the combination with a platen, of a series of rearwardly-striking type-bars, key-levers 19 extending rearwardly beneath the type-bars and fulcru med at their rear ends, bell-levers having at their lower ends forks 17 which ongage a common fulcrum-bar 18 extending transversely beneath the key-levers, said bell levers having upwardly-extending arms 16 which are connected by links 15 to the typebars, and also having rearwardly-extending arms 23 provided with ledges 24: upon which the lower edges of the key-levers hear at successive points so as to decrease the lever age of the keys upon the type-bars during the printing strokes, and springs 10 connected to the type-bars.

Signedat the borough of Manhattan, city of New York, in the county of New York and State of New York, this 8th day of March, A. D. 1901.

JAMES CORR.

Witnesses:

K. V. DONOVAN, E. M. WELLS.

Images