US1105081A - Type-writing machine. - Google Patents

Description

A. E. KARLBERG & M. B. SARGENT.

TYPE WRITING MACHINE.

APPLICATION FILED APB-,7, 1914.

Patented July 28,1914.

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W1 NE SE5 I (m 1A. B. KARLBERG & M. B. SARGBNT.

TYPE WRITING MACHINE.

APPLICATION FILED APBHT, 1914.

Patented July .28, 19%

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ABVID EMANUEL KARLBERG AND MARSHALL BID WELL SARGENT, 0F OWENSBORO, KENTUOKY,, ASSIGNOIRS TO THE STENOTYPE COMPANY, OF INDIANAPOLIS,

INDIANA.

TYPE-WRITING MACHINE.

I Specification of letters Patent. t t d July 23, 19145 Application filed April 7, 1914. Serial No. 830,316.

To all whom it may concern: i Be it known that we, Anvil) E. KARLBERG ribbon mechanism therefor,the object of the invention being to simplify and improve ribbon mechanism, to the end that its operation shall be sure and accurate, and so that itmay be readily shifted either normally or automatically with accuracy and without danger of derangement of or undue strain I ina-fter set forth and pointe -vided for feeding a strip 3 of upon any of the parts.

lVith this object in View, the invention consists in certain novel features of construction and eombinationsof arts as hereout in the claims.

In the accompanying drawings, Figure 1 is a longitudinal sectionalview of a stonegraphic typewriting machine embodying the improved. ribbon mechanism; Fig 2 is a front elevation partly in section, and Fig. 3 is a view partly in plan and partly in section.

1 represents the main frame or casing of the machine, in the upper portion of'which a platen 2 is located, and mechanism is propaper step-bystep in front of the platen. T e paper feeding mechanism forms no part of the present invention and a detail explanation of the same is unnecessary It may be stated however, that the paper feeding mechanism is connected with and operated by the movements of a universal bar 4,the latter being actuated by arms 5 of key levers 6. The type bars 7 of the machine are pivotally mounted in a notched bar 8 and connected at their lower ends with. the key lever arms 5,

A transverse frame 9 is secured within the main frame or casing 1 and is provided with bearingsfor vertical shafts 10, 10, to which ribbon reels 11 are secured and the inking ribbon 12 is guided from one reel to the other and between the type of the type bars and the platen by means of suitable guide rollers 13.

Bevel pinions 14 are secured to the lower portions of the vertical shafts 10 and mesh -with smaller bevel pinions 15 secured to short shafts 16, the latter being mounted in suitable bearings 17 on the transverse frame 9. The short shafts 16 are provided with clutch members 18, 19 and the inner end ortions 20 of the short shafts constitute earings for a sleeve 21 mounted to slide thereon, said sleeve being provided at its respective ends with clutch teeth or members 2223 to cooperate wit-h the clutch members 18,19. I I v A ratchet wheel 24 is made rigid with. the sleeve 21 and is actuated by a dog25, which is pivotally attached to and actuated by the universal bar 4 and is guided in its movements by the slot-ted upper end of a post 26 rigid with the frame 9. Retrograde rotation ofthe ratchet wheel is prevented by a dog 27 pivotally supported by the post 26.

The ratchet wheel 24 is loosely embraced by the arms 28 of a yoke 29, and this yoke is also made with arms 30 hung by means of pivoted links 31 from a block 32 rigid with the frame 9. The yoke 29 is made with an operating arm 33 which passes upribbon.

The block 32 is made with horizontal sockets 35. in which rods 36, 37 are longitudinally movable, springs 38, 39 being located in said sockets between the inner ends of said rods and the operating arm 33 at respective sides of the latter. Slots 40 are made in the block 32 to receive pins 41 ont-he rods 36, 37 for guiding said rods and preventing them from turning. At their outer ends, the rods 36, 37 are provided with rollers 42, for a purpose hereinafter explained. The operating arm 33 is made with two notches43 to receive a spring pressed dog 44 mounted in a hollow boss 45 on the block 3-2, for retaining the operating arm and the parts which it controls from accidental displacement.

Each ribbon reel is provided with a hub 46 which depends below the reel as shown in Figs. 1 and 2. Each of these hubs is made I with a recess 47 which is normally spanned by a sprin actuated hin ed section'48, the spring tenc ing to open this hinged section when the ribbon shall have I become exhausted from the reel, as shown at the right hand side of Fig. 3, but when the ribbon is on the reel, the hinged section 48 will be closed and held so by the ribbon, as shown at the left in Fig. 3.

Durin the normal operation of the mechanism, the rollers 42 of the rods 36-37, will ride on the hubs46 of the ribbon reel s, and two springs 38-39 will be under approximately the same tension, so that the ratchet wheel and clutches will remain in the positions to which-they may be shifted (the spring-pressed dog 44 assisting in such retention) and so that said ratchet wheel and clutch devices may be shifted manually.

lVhen the inking ribbon shall have become exhausted from one of the reels, the hinged section 48 of the hub 46 of this reel will be opened by the action of its spring, the roller of one of the rods (3637) will be forced by the action of one of the springs (38 or 39) in a direction to enter the now uncovered recess in the reel hub. The roller 42 on the rod (36 or 37) will first engage hub 46 at one edge of the recess. and the pressure exerted against said rod by the spring (38 or 39) will cause the reel-hub to be positively moved sufliciently to insure the entrance of the roller 42 into the recess.

When one of the rods (36 or 37) is caused by its spring at one Side of the operating arms 33 to move longitudinally as above described, the tension of the spring at the opposite side of said operating arm will cause the latter tobe moved laterally. As the arm 33 is rigid with the swinging yoke 29, the latter will be moved whenspring-pressure is applied as above described to the arm 33,

and the movement of the yoke will operateto shift the ratchet Wheel and alter (by means of the clutch devices),its operative relation to the respective reel gearings, thus effecting a reversal in direction of the feed of the inking ribbon.

- It is apparent that when the key levers are operated,- the universal bar 4 will be actuated to operate the dog 25 and thus cause motion 7 to be transmitted (through the ratchet wheel clutch devices and gearing) to one of the ribbon reels and that when the shifting devices are operated, either manually or automatically, motion will be transmitted to the ribbon reel for moving the inking ribbon in the reverse direction.

Having fully described our invention what we claim as new and desire to secure by Letters-Patent, is 1- 1. In ribbon mechanism for typmvriting machines, the combination with two ribbon reel shafts, alining shafts, and gearing between said ribbon reel shafts and said alining shafts, of a ratchet wheel between said alining shafts, clutch devices between said ratchet wheel and said alining shafts, a universal bar, key levers actuating said universal bar, a dog carried by the universal bar and engaging the ratchet wheel, and

means for shifting said ratchet wheel toshift the clutch devices.

2. In ribbon mechanism for typewriting machines, the combination with ribbon reel shafts, alining shafts, and gearing between said alining shafts and ribbon reel shafts, of a ratchet wheel between said alining shafts, means for actuating said ratchet wheel, clutch devices between the ratchet wheel and alining shafts, a yoke embracing the ratchet wheel, springs for moving said yoke to shift the ratchet wheel and the clutch devices, and means for controlling the operation of said springs.

3. In ribbon mechanism for typewriting machines, the combination with a frame, ribbon reel shafts, alining shafts, and gearing between said alining shafts and the ribbon reel shafts of a ratchet between the alining shafts, means for actuating the ratchet wheel, clutch devices between the ratchet wheel and the alining shafts, a swinging yoke suspended from the frame and embracing the ratchet wheel. and means for actuating said yoke to shift the ratchet wheel and the clutch devices.

4. In a ribbon mechanism for typewriting machines, the combination with a frame, ribbon reel shafts, alining shafts, and gearing between said alining shafts and the ribbon reel shafts, of a ratchet wheel between the alining shafts, means for actuating said ratchet wheel, clutch devices between said ratchet wheel and the alining shafts, a block rigid with the frame, a swinging yoke suspended from said block and embracing the ratchet wheel, an operating arm projecting from said yoke and through a slot in said block, said block also having horizontal sockets, rods longitudinally movable in said sockets, springs between said rods and the operating rod, andmeans for controlling the movements of said rods to shift said yoke, ratchet wheel and clutch devices.

- 5. In a, ribbon mechanism for typewriting machines, the combination with a frame, a block rigid therewith, ribbon reels having recessed hubs, spring actuated sections for normally closing the recesses in the reel hubs, gearing for actuating the reels, and means for shifting the operative'relation of said gearing from one reel to the other, of an operating arm movable in said block, connectime between said arm and the gear shift- In testimony whereof, we have signed this ing means,- 1'06" Engitudinally movable in specification in the presence of two subscrib- 15) said block, we on said rods and eeepering Witnesses. 1 ating Wifll the reel hubs, springs in the block ARVID EMANUEL KARLBERG.

.- between said rod and the operating arl'n, MARSHALL BIDWELL SARGENT.

next a spring-pressed dog carried by the \Vitnesses: block for holdmg the 01301" 1 11;; arm 1n p0s1 EDW, GROLZINGER, twn to which it may be shifted. CHAS. G. NALLE.

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