US717837A - Type-writing machine. - Google Patents

Description

' No. 717,837. PATENTBD JAN. 6, 1903.

G. GABRIELSON. TYPE WRITING MACHINE.

APPLICATION FILED OUT. 26, 1901.

INVENTUH TTURNEY T -a scams veTzM CQJPHOTO- ATENT OFFICE.

CARL GABRIELSON, OF SPRINGFIELD, MASSACHUSETTS, ASSIGNOR TO UNION TYPEWRITER COMPANY, OF JERSEY CITY, NEW JERSEY, A CORPORA-' TION OF NEIV JERSEY.

TYPE-WRITING MACHINE.-

SPECIFICATION forming part of Letters Patent No. 717,837, dated January 6, 1903.

v Application filed October 26, 1901. Serial No. 80.036. (No model.)

T 60% whom it may concern:

Be it known that I, CARL GABRIELSON, a citizen of the United States, anda resident of Springfield, in the county of Hampden and State of Massachusetts, haveinvented certain new and useful Improvements in Type-VVriting Machines, of which the following is a specification. 1

My present invention relates to carriage- IO feed mechanisms for type-writing machines, and more particularly to carriage-feed mech anisms employing an escapementwheel such, for instance, as that embodied in the Well-known No. 6 Remington type-writing .15 machine; and the object of my invention is to provide simple and effective means for preventing a reverse or backward movement of the wheel when the carriage is moved back to the right to begin a new line of writing.

To this end my invention consists in the novel construction, arrangement, and combination of parts hereinafter described and claimed.

In the accompanying drawings, Figure 1 is a vertical sectional View, taken from front to rear, of sufficient number of parts of a typewriting machine to illustrate my invention. Fig. 2 is a detail rear elevation of a portion of the same with parts broken away more 0 clearly to illustrate the construction. Fig. 3 is a detail perspective view of the combined feed-dog and escapementwheel stop. Fig. 4 is an enlarged detail rear elevation of a portion of the mechanism illustrated in Fig. 2

5 with parts broken away, the parts being illustrated in the arrested positions. Fig. 5 is a detail transverse sectional view taken on the line a: a; of Fig. 1.

In the accompanying drawings I have shown suificient of the mechanism of a No. 6 Remington type-writing machine to illustrate my invention in its application to that machine. The framing of the machine is designated as 1, and the usual key-levers 2 are mounted in the framing and connected by links3to type-bars 4. The platen 5 is mounted in a suitable carriage 5, having the usual feed-rack 6. Parts of the carriage construction have been omitted from the drawings in order to simplify the views. The feed-rack 6 meshes with a pinion 7, that is carried upon a shaft 8, which rotates in a bearing 9, sup ported by a fixed portion of the framing of the machine. An escapement-wheel 10 is loosely mounted upon the shaft 8 and may be turned in the direction of the arrow .2 in Fig,

2 with the pinion 7 to permit a feed movement of the rack 6 and the carriage in the direction of the arrow y. When, however, the carriage with the feed-rackG is moved in the'opposite direction, as indicated by the arrow in Fig. 4, thefeedorescapement wheel remains stationary. This is accomplished by the usual spring-pressedpawls 8 that are pivoted to a cylindrical housing 7 which is made fast to the shaft 8 byascrew, as shown in Fig. l, and these pawls are adapted to engage the teeth of a ratchet-wheel 10 se cured to one face of the feed-wheel 10, so that a movement of the carriage from left to right will cause the pawls 8 to ride freely over the teeth of the cooperating ratchet-wheehwhere as the pawls will engage the teeth of the ratchet-wheel 10 to prevent a movement of the carriage independently of the feed-wheel in the opposite direction.

In order positively to maintain the feedwheel against reverse or backward movement by the friction of the spring-pressed pawls when the carriage is moved in the direction of the arrow in Fig. 4, I haveprovided a spe cial stop or detaining means for the feedwheel, which will be hereinafter described.

Beneath the key-levers 2 extends a universal bar 11, which is connected at its ends to connecting-rods 12, that in turn are connected to arms projecting from a bar 13, that is secured to an arm 13 of the feed-dog carrier. This feed-dog carrier may comprise a rock-shaft 14, pivoted in the framing of the 0 machine, and an arm 15, on which the feeddogs 16 and 17 are mounted. The dog 17 may be termed a fixed dog, because it has no movement in the direction of the movement of the carriage, though it has a motion at 5 right angles to the carriage with the feed-dog carrier. The dog 16 may be termed the movable or stepping dog, because it moves in the direction of movement of the carriage, as well as transversely thereto, to permit the 2 time? step-by-step feed of the carriage. The movembody my invention except the substituable feed-dog 16 is pivoted to the arm 15 of the feed-dog carrier, as indicated at 18, so that it may vibrate independently of the carrier and in the direction of feed of the paper-carriage. The parts thus far described are of the usual construction, and the feed action takes place in the usual manner, though it should be understood that the feed-dogs and the parts which cooperate therewith may be of any suitable construction. The dog-carrier is provided with the usual returningspring 1 The stepping feed-dog 16 has operatively connected thereto a feed-wheel stop 19, which I prefer to make as an integral part of the stepping-dog. The stepping-dog is provided with a light coiled spring 20, that tends to maintain it out of lateral aliuement with the fixed dog, so that when it is free it will be moved forward to cooperate with the next tooth of the feed-wheel to that which is engaged by the fixed dog. This coiled spring, however, has a lighter tension than the main spring of the carriage, so that when the carriage-spring exerts its tension on the movable or stepping dog it overcomes the tension of the spring 20, as is usually the case.

From an inspection of Figs. 2 and 4 of the drawings it will be observed that the form of the back 21 of each tooth of the stepping or feed wheel 10 corresponds substantially to an arc struck from the pivot 18 of the feed-dog in order that the stop 19, which turns about said pivot and in close proximity to the outer end of the nearest tooth of said wheel, mayfreely vibrate from the position indicated in Fig. 2 of the drawings to that represented in Fig. 4, whereby the stepping-wheel will be immediately and automatically arrested before it has an opportunity to move any appreciable distance in a backward or reverse direction. It will be understood that it may not be necessary to make the entire back of each tooth conform to the arc struck from the pivot 18. So long as that portion of the back of each tooth which cooperates with the stop is struck from this are the desired result may be obtained. A back stop 22 may be provided upon the dog carrier to cooperate with a downwardly-extended projection 23 on the stepping-dog in order to limit the movement of the dog in one direction, the usual front stop or any preferred means being employed to limit the movement of the dog in the op posite direction.

WhileI have described one form or embodiment of myinvention, I would have it understood that various modifications maybe made without departing from the spirit of my invention in order to adapt it to various forms of escapements.

It will be understood that the invention is readily applicable to the No. 6 Remington type-writing machine with but few changes and that the existing escapement mechanism of that machine requires no modification to tion of certain parts for other detachable parts in the existing machine.

The parts are shown in normal position in Fig. 1, wherein the movable dog 16 is in normal engagement with the feed-wheel. In operation a depression of, any of the key-levers or the spacing-key will cause the arm 13 to be depressed, thus moving the dog-carrier arm 15 forwardly and carrying the fixed dog 17 into engagement with the teeth of the feedwheel. This movement of the dog-carrier releases the movable dog, and the spring 20 thereof forces it forward one step, so that when the finger of the operator is released from the key and the dog-carrier is returned by its spring 14 the movable dog will be brought into engagement with the-next tooth of the feed-wheel, and the carriage-spring will advance the carriage one step or letterspace distance. When the end of a line is reached, the operator moves the carriag'e,together with its rack 6, back to the startingpoint and in the direction of the arrowin Fig. 4:. This retractive movement of the carriage causes the pinion 7 to be turned in the direction of the arrow thereon without transmitting movement to the feed-wheel 10 by reason of the pawl-and-ratchet connections 8 and 10*. The tension of the usual carriagespring (not shown) being thus removed from the dog 16, the spring 20 will become effective to move said dog slightly to bring the stop 19 into engagement with the back 21 of a tooth on the feed-wheel, as at Fig. 4, and thereby prevent any backward'movement of the wheel. As soon as the hand of the operator is removed from the carriage the efiective force of its spring is again exerted upon the feeding device or escapement through the pawls 8 and the ratchet-wheel 10 and it will cause a toothof the feed-wheel to bear against the movable dog, thereby causing a slight movement of the dog back into alinement with the dog 17, and the stop 19 will be moved to the position indicated in Fig. 2, where it is out of engagement with the wheel, and the wheel may be rotated in the direction of the arrow to permit the step-by-step feed of the carriage. By connecting the stop or abutment 19 with the movable or stepping dog the said stop may be arranged to be normally out of contact or engagement with the escapement'wheel, and thus avoid friction and wear during the rotative stepping movements of said wheel and during the stepping movements of said dog in the printing and feeding operations of the mechanism; but when the carriage is retracted and the carriage-driving power or spring is opposed by the hand of the operator the'spring 20 operates instantly to vibrate the dog 16 and move the stop 19 behind a tooth of the stepping-wheel, and thus block or arrest said wheel against backward rotation. As soon 1 as the carriage-spring is again permitted to act on the carriage the stop 19 is automatically restored topnormal position .by the presnation of a stepping-dog, a feedwheel with which said dog cooperates and a stop controlled by said stepping-dog and cooperating with the feed-wheel. V,

2. In a type-writing machine, the combination of a pivoted stepping-dog, a feed-wheel with which said dog cooperates and a stop carried by said stepping-dog and cooperatingwith the feed-wheel. Y

3; In a type-writing machine, the combination of a feed-wheel, a dog fixed against movement in the direction of the feed of the carriage, a dog which is movable in the direction of the movement of the carriage, and a stop which is controlled by the said movable dog and which cooperates with the feedwheel to prevent a'reverse movement thereof.

4. In a type-writing machine, the combination of a feed-wheel, a fixed dog, a stepping-dog and a stop which is connected to and moves with the said stepping-dog and which cooperates with the feed-wheelie prevent a reverse movement thereof.

5. In a type-writing-machine, the combination of a feed-wheel, feed-dogs which cooperate with saidwheel and a movable stop normally out of engagement with thefeede wheel to 'prevent a reverse movement of the feed-wheel, the movement of said stop being controlled by a movement of one of the dogs.

6. In a type-writing machine, the combination of a feed-wheel, feed-dogs which cooperate with said wheel, and a stopwhich is normally out of engagement with the feedwheel and which is operatively connected to one of the dogs to move therewith to prevent a reverse movement of the feed-wheel.

7. In a typeswriting machine,ithe combination of a feed-wheel,'feed-dogs which cooperate therewith, a vibrating carrier on which said dogs are mounted and a stop carried by one of said dogs to prevent a reverse movement of the feed-wheel; said stop being normally out of engagement with the feedwheel but adapted to cooperate therewith at the beginning of the retractive movement of the carriage.

8. In a type-writing machine, the combination of a -feed-wheel, feed-dogs which 00- operate therewith, a vibrating carrier upon which said dogs are mounted,. and a normally disengaged stop that is carried by one of said feed-dogs and cooperates with the feed-wheel and which is movable with the dog independently of the feed-dog carrier at the beginning of the retractive movement of the carriage.

. 9. In a type-writing machine, the combination of a feed-wheel, a stepping-dog and a stop that is carried by the dog and moved thereby into and out of stopping relation with the wheel at each feed operation.

10. In a type-writing machine, the combination of a "feed -wheel, a pivoted springpressed stepping-dog and a stop that is carried by the dog and moved thereby into and out of stopping relation with the wheel at each feed operation.

1l.- In a type-writing machine, the combination of feed-dogs, a feed-wheel cooperating therewith, a' pivoted automatically-operated stop which cooperates with said feed-wheel to arrest its reverse movement, the cooperating portion of the back of each tooth of the feed-Wheel conforming substantially to the are upon which said stop swings.

12. In a type-writing machine, the combination of feed-dogs, a'feed-wheel cooperating therewith, a pivoted automatically-operated stop-which cooperates with said feed-wheel to arrest its reverse movement, the cooperating portion of the back of each tooth of the wheel conforming substantially to the are upon which said lock swings. r

13. In a type-writing machine, the combitherewith, a feed-pinion operatively connected to said feed-wheel and adapted to move therewith in one direction and a feed-rack carried by the carriage and adapted to mesh with the feed-pinion, a pivoted automaticallyoperated' stop which cooperates with said wheel to arrest its reverse movement, the cooperating portion of the back of each tooth of the wheel conforming substantially to the are upon which said stop swings.

14. In a type-writing machine, the combination of a feed-wheel, feed-dogs cooperating therewith and which are adapted to be moved I transversely into and out of the path of the teeth of said wheel, and a stop normally out of contact with the feed-wheel and a spring which is efiective to move the stop into engagement with the feed-wheel toprevent a re verse movement thereof. I

15. In atype-writing machine and in an es capement mechanism, the combination with the carriage and escapement-wheel, of a stop normally out of contact with said wheel but adapted automatically to engage the same during a retractive movement of the carriage.

16. In a type-writing machine and in an escapement mechanism, the combination with the carriage and escapement-wheel, of a pivoted, spring-pressed stop normally outof contact with-said wheel but adapted automatically to engage the same during a retractive movement of the carriage.

17. In a type-writing machine and in-an escapement mechanism, the combination with a powerdriven carriage and an escapementwheel, of a stepping feed-dog, and a stop normally out of engagement with said wheel and attached to'said dog, the said dog being normally in engagement with said escapementwheel, the construction and arrangement being such that when the carriage is retracted against its driving poweiysaid stop will automatically move into engagement with said 9 a nation of feed-dogs, a feed-wheel cooperating v Wheel to prevent backward rotation thereof and will automatically return to the normal position as soon as the driving poweris again permitted to exert its force upon the carriage.

18. In a type-writing machine, the combination of a carriage, a feed-rack carried by said carriage, a pinion with which said rack meshes, pawls adapted to rotate with the feedpinion, a ratchet-wheel with which said pawls cooperate, a feed-wheel to which said ratchetwheel is connected, feed-dogs that cooperate with the feed-Wheel, and a pivoted automatically-operated stop normally out of engagement with the feed-wheel and controlled by a movement of one of said dogs during a retractive movement of the carriage.

19. In a type-Writing machine, the combination of a power-driven carriage, a feed-rack carried by said carriage, a pinion with which saidrack meshes, a shaft upon which said Signed at the borough of Manhattan, city of New York, in the county of New York and State of New York, this 25th day of October,

A. D. 1901. I

CARL GABRIELSON.

Witnesses:

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

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