US928856A

US928856A - Type-writing machine.

Info

Publication number: US928856A
Application number: US49324409A
Authority: US
Inventors: John C Doane
Original assignee: Underwood Typewriter Co
Current assignee: Underwood Typewriter Co
Priority date: 1909-05-01
Filing date: 1909-05-01
Publication date: 1909-07-20
Anticipated expiration: 1926-07-20

Description

J. G. DOANE.

TYPE WRITING MACHINE.

.APPLIGATION FILED MAY 1, 1909.

928,856. Patehted July 20., 1909.

- AWW 4 I D v u I A TTORNE UNITED srnrns PATENT- OFFICE.

JOHN G. DOANE, OF HARTFORD, CONNECTICUT, ASSIGNQB TO UNDERWOOD TYPEWRITER- 1 COMPANY, OF NEW YORK, N; Y., A CORPORATION OF NEW JERSEY.

TYPE-WRITING- MACHINE.

Specification of Letters Patent.

Patented July 20, 1909.

Application filed May 1, 19l19. Serial No. 493,244.

To all whom it may concern: Be it known that 1, JOHN G. DOANE, a citizen of the United States, residing in Hartford,

. Iul Improvements in Type-Writmg Machines,

in the county of Hartford and State of Con-' necticut, have invented certain new and usei of which the following is a specification.

This invention relates to devices for releasably connecting the platen to the linespacewheel of a type-writing machine, to pcrinit the platen to be rotated independently of the line-space wheel.

The principal object of this invention is to provide a simple and durable device of this character readily applicable to existing machines In the form of the invention illustrated in the drawings, the line-space'whei'is loose 'u on the platen axle, and a nest of friction p ates or washers is employed to bind. the line-space wheel to the platen. ,Friction plates'positively connected to the platen are alte'rnate'dwith others that are positively connected to the line-space wheel; and when all theplates are pressed together they serve to lock to connect the line-space wheel to the laten. Pressure is normally applied to the triction plates by means of a spring. A finger-ring is slida-bly mounted, to operate dogs which release the pressure on the plates, to permit the platen to rotate independently of the line-space wheel. Means are provided to lock the device in the platenreleased position.

In thev a'ccom anying drawings, Figure 1 is a view of the p aten and platen frame of an Underwood front strike writing machine,

with the present improvements applied thereto. Fig. 2 is a view partly in. section and partly in outside elevation showing the improved device in the platen released posi tion. Fig. 3 is a view similar to Fig.2 but showing the device in the platen locked position. Figs. 4 and 5 are perspective views of Fig. 6 is a sectionalt'he friction plates. view of the platen axle and collar. Fig. 7 shows perspective. views of a finger-piece or ring, a head, a compression-plate or drum,

and a set of friction plates connected to the line-space wheel to rotate therewith.

' The usual cylindrical platen 1 is fixed to an axle 2-,; whereby it' is journaled in'a platen frame'3, said axle 2 having fixed upon its endsthe us al hand wheels 4 for rotating the platen. The platen is rotated by the usual I mains stationary, held by the detent 9.

line-spacing mechanism, comprising a lever 5, a slide 6 and a pawl 7, the latter adapted to engage a notched line-space wheel 8, as

usual. The line-space wheel is usually engaged-by a detent or check spring 9. The line-space wheel is loosely mountedupon a boss or collar 10 fixed upon the platen axle 2,

and abuts against a flange or shoulder 11 formedupon one end ofsaid collar. The

purpose of mounting the-line-space wheel oosely upon saidcollar is to permit relative friction washers 12 are connected 'to the linespace wheel so as to turn therewith by means of lugs 14 projecting from the side of the line-' space wheel parallel with the axle 2, and fitting in recesses 15 provided in opposite edges of said washers. The washers 13 are connected to the platen to rotate therewith by being formed with oblong central perforae tions 16 to fit closely upon the collar or boss 10, which is cut' away on opposite sides to form flats or cheeks 17 The perforations 16 fit this flattened portion of the collar 10.

The i rotation between the-platen and the line- Thus it will be seen that the washers 13 must always rotate with the collar 10,1while the washers 12, which have circular perforations '18, may turn freely around said collar 10, to-

gether with the line space wheel Nor? mally all of the washers, each of.wh1ch 1s. movable along the collar 10, are packed or pressed. together by a coiled compression.

spring 19 which is confined betweenaplate .20 and a'heac 21 secured by screws 22 to the end of the collar 10 opposite the flange 11; said spring being, for compactness, seated n an annular groove 23 formed in the face of said'head. It will be understood that the spring tends constantly to press thBfI'lClZlOIl washers and the line-space wheel agalnst said flange 11-. ---The multiplication 'o:= the-- friction washeramultiplies the braking action, so that amoderately strong spring is enabled to cause a powerful frictional connect on between one set of washers and the other, and hence between the line-space wheel and the platen; the resistance to a relative movement between the line-space wheel and the platen being equal to that produced by frictlon between any'two contiguous faces of the washers, multiplied by dou ble the aggregate number-of the washers in the two sets. The pressure late may be' provided with a cylindrical ange 24 to form 'a drum to inclose the two sets of friction washers.

To release the platen from the control of the line-space wheel, a knurled ring 25 is provided, fitting loosely upon the periphery of the head 21 for a sliding movement thereon in a direction parallel with the axle 2; said the position at Fig. 2, engag ring having'opposite pins 26 to project into slots 27 formed in the periphery of the head 21, to prevent displacement or removal of the ring from the head.- The ring, in sliding upon said head from the position at Fig. '3'to es cam edges 28 formed on' a pair of dogs or heels 30, whereby they are fulcrumed upon steps 31 formed in recesses 32 provided in the head 21; said dogs playing in radial recesses 33. Said dogs have toes 34 to catch in eyes 35 projecting from the plate 20, so that in. turning from the position at Fig. 3 to that at Fig. 2, the plate is drawn to the'left against the tension of spring 19, and-therefore the pressure upon the friction washers is relieved,

- and hence the platen may be turned freely while the line-space wheel remains stationary.- The cam edges of the dogs are provided with dwell portions 36, whichare engaged by the slip riug25ati-the com letion of its movement to the osition at ig. 2, so that the dogs, althoug acted on by the spring 19, are

powerless to turn, and have no tendency to revolve therewith and capab e of lateral movement, friction plates alternating ornested with said friction plates and mounted on said collar against rotation, -and also ca- ,pable of axial movement thereon, acap plate, and means to cause said cap plate to ind, the friction plates together to connect the line-space wheel to the platen.

2. In a typewriting machine, the combination with a platen and'an axle therefon of a evers29, having eluding of axial movement thereon, a cap plate, and f means to cause said cap plate to bind the friction plates together to connect the linespace wheel to the platen, said binding means comprising a sprin confined between the cap plate and a head which is nxed to said 5 collar.

3. In a typewritmg machine, the combine-- tion with a platen and an axle therefor, of a line-space wheel revolubly mounted upon a collar on the platen axle and abutting against a flange formed thereon, a plurality of f ction disks loosely mounted to turn on the collar and connected to the line-s ace wheel to revolve therewith and capahe of lateral movement, friction plates alternating or nested with said friction plates and mounted on said collar against rotation, and also ca pablc of axial Inoyment thereon, a cap plate, means to cause said cap plate to bind the friction )lates together to connect the linespace W eel to. the platen, said binding means comprising a SPI'III" conimed between the ca plate and a head: which 18 fixed to said co lar, and manuallyo erable means to cause said friction drum and spring to release the clutch.

4. In a typewriting machine, the-combination with a platen and an axle therefor, of a line-space wheel revolubly mounted upon a collar on the platen axle and abutting a ainst a flan e formed thereon, a plurality o friction disksloosely mounted to turn on the collar and connected to the line-s ace wheel to revolve therewith and capab e of lateral movement, friction plates alternating or nested with said friction plates and mounted on said collar against rotation, and also capa'ble of axial movement thereon, a cap plate, means to cause said cap plate to bnid the friction lates together to connect the linespace w heel to the platen, said binding means comprising a s' ring confined between the ca plate and a sad which is fixed to said co lar, and manually 0 )erable means to cause said friction drum an spring to release the clutch, said manually operable means ina plurality of dogs or levers, fulcrume in recesses formed in said head, and engaging eyes formed on the cap late.

5. In a type'v-sriting machine, t io combination with a platen and an axle therefor, of a line-space wheel revolubly mounted upon a collar on the platen axle and abutting agair a flange formed thereon, a plurality of fi tion disks looselymounted to turn on the ce'i-- id ca plate and a head 'which is fixed to said co lar, manually operable means to cause said friction drum-and spring to release the clutch, said manually operable means including aplurality of dogs or' levers, fulcrumed in .recesses'formed in said head and engaging eyes formed on the cap' plate, and a ring mounted on the circumference of the head to slide over cam faces on the arms of the dogs or levers to turn them on their fulcrums to pull the cap-plate and relieve the pressure on the friction plates.

6. In a-typ'ewriting machine, the combination with a laten and an axle therefor, of a line-space w 1661 revolubly mounted upon a collar on the platen axle and abutting against a flange formed thereon, a plurality of friction disks loosely mounted to turn on the collar and connected to the line-space wheel to revolve therewith and capable of lateral movement, friction plates alternating or nested with'said friction plates and mounted 'on'said collar against rotation, and also capable of axial movement thereon, a cap-plate, means to cause said cap-plate to bind the friction plates together to connect the linespace' w reel to the platen, said binding means comprising a s ring confined between the caplate and a iiead which is fixed to said col ar, manually operable means to cause said friction drum and spring to release the clutch, said manually operable means in cluding a plurality of dogs or levers, fulcrumed in recesses formed in said head and engaging eyes formed on the cap-plate, and a .ring mounted on the circumference of the "head to slide over cam faces on. the arms of the dogs or levers to turn them on their fulcrums to pull the cap-plate and relieve the pressure on the friction plates; means being provided to detain the clutching mechanism in the released position.

7. In a typewriting machine, the combination with a platen and an axle therefor, of

a line-space wheel revolubly mounted upona collar on the platen axle and abutting against a flange formed thereon, a plurality of friction disks loosely mounted to turn on the collar and connected to the line-s ace wheel to revolve therewith and capab e of lateral movement, friction plates alternating or nested with said friction plates and mounted on said collar against rotation, and also capable of axial movement thereon, a ca plate, means to cause said cap plate to the friction plates together to connect the line-space wheel to the platen, said binding means comprising a s ring confined between thecap plate and a lead which is fixed to said collar, manually operable means to cause said friction drum and spring to release the clutch, said manually operable means including a plurality of dogs or levers,fulcrumed in recesses formed in said head and engaging eyes formed on the cap plate, and a ring 'mounted on the circumference of the head to slide over cam faces on the arms of the dogs or levers to turn them on their fulcrums to pull the cap-plate and relieve the pressure on the friction plates; said ring engaging with dwell portions formed on the cam edges of the dogs, to counteract any tendency of the ring to slip off from the dogs.

8. In a typewriting machine, the combination with a platen and a line-space wheel for binding sai'd friction washers together or releasing them at will, including a spring and a finger piece opposed thereto, one ofsaid spring and finger-piece elementsconstructed to bind the washers together and the other to release the washers.

10. In a typewriting machine, the.combi-- nation with a laten and a line-space wheel revoluble relatlvely thereto, of a nest of friction-washers some connected to the platen and others to the line-space wheel, means forbinding said friction washers together or releasing them at will, inpluding a spring and a finger piece opposed thereto, one of said spring and finger-piece elements-constructed to bind the washers together and the other to release the washers, and means being pro vided to lock said finger piece in effective position. v

11. In a typewriting machine, the combination with a platen and a line-space wheel, of a nest of washers, certain of said washers having openings at their outer edges engaged by a projection upon one of the line-space wheel and platen elements, and others of said washers having central means for con necting them to the other of said elements, and releasable means for. binding said washers together.

12. In a typewriting machine, the combi nation with a platen having an axle,-of a loosely mounted line-s ace wheel, a boss or collar fixed onsaid a e a nest ofwashers also mounted on said collar, certain of said washers connected to the line-space; heel i Hill and loose on the collar, and others of said washers alternating with said loosewashers and keyedor splined to the collar to rotate with the platen, and the releasable means to bind said washers together.

.13. In a typewriting machine, the combi' nation with a platen having an axle, of a loosely mounted line-s ace wheel, a boss or collar fixed on said ax e, a nest of washers also mounted on said collar, certain of said washers connected to the line-space wheel and loose on the collar, and others of said washers alternating with said loose washers and keyed or splined to the collar, to'rotate with the platen, a s ring to bind said washers together, a cap-p ateintervening' between said spring and said washers, a head having a bearing for said spring, and a lever or dog upon sa1d head to act upon sa1d cap-plate to 0 relieve the pressure upon the washers.

14. In a-typewriting machine, the combination with a platen having anaxle, of a loosely mounted line-space wheel, a boss or collar fixed on said axle, a nest of washers also mounted on said collar, certain of said washers connected to the line-space wheel and loose 011 the collar, and others of said washers alternating with said loose washers and keyed or splined to the collar to rotate with the platen, a s ring to bind said washers together, a cap-p ate intervening between said spring and said washers, a head having a bearing for said spring, a lever or dog upon said head to act upon said cap-plate to relieve the pressure upon the washers, and a I ring or finger-piece movable upon said head to control sa1d lever or dog.

JOHN c. DUANE.

\Vitnesses W. M. DYORKMAN, LYMAN D. BOUGHTON.