US788758A - Type-writing machine. - Google Patents

Description

PATENTED MAY 2, 1905.

L. P. DISS.

TYPE WRITING MACHINE.

APPLICATION FILED JAN. 3, 1809.

2 SHEETS-SHEET 1V m E bd ma l,

WITNEESEE? by am ML 'HIE I T URNEY No. 788,758. PATENTE!) MAY 2, 1905. L..P. DISS.

TYPE WRITING MACHINE.

APPLIUATION FILED JAN. s, 1999.

2 SHEETS-SHEET a.-

INVENTDR Patented May 2, 1905.

FFTCE.

LOUIS P. DISS, OF lLlON, NEWT YORK, ASSIGNOR TO VVYOKOFF, SEAMANS t BENEDIOT, OF ILION, NEW YORK, A CORPORATION OF NEW YORK.

TYPE-WRITlNG IVIACHlNE.

SPECIFICATION forming part of Letters Patent No. 788,758, dated May 2, 1905.

Application filed January 3, 1899. Serial No. 700,996.

To @ZZ 11171/1371?, it may concern:

Be it known that l, LOUIS l). VDIss, a citizen of the United States, and a resident of llion, in the county of Herkimer and State of New York, have invented certain new and useful 1m provenients in Type -Wfriting Machines, of which the following is a specification.

The present invention relates primarily to One object of the invention is to provide for an instantaneous release of the carriage on the commencement of the return movement of a finger-key.

Another object is to securely or firmly hold the carriage while the type make their printing impact.

Another object is to have the forward movement of the carriage begin before the holding members of the escapement are wholly freed from each other in the escape action, and other objects, as will hereinafter more fully appear.

In the preferred form of the invention there is provided a rocker or dog-carrier on which the holding-dog is pivoted on an axis parallel or substantially parallel to the plane of the rack, straight or segmental or circular, and the metal or body connecting the dog proper with its axis (as a spindle or shaft) is extended to form an arm, curved or straight, which coacts with the side of the rack to form a stop for the dog when the latter is rotated in the forward direction by the rack-tooth with which it is in engagement and to rotate the dog in the reverse direction about its axis to bring the dog-face into position to engage with the face of a succeeding` rack-tooth. A suitable stop upon the dog-carrier is provided for limitingI the motion of the holding-dog when moved in said reverse direction by the arm and the rack. There is also a feed-dog normally in engagement with the rack and pivoted to move or step backward one tooth (or more) of the rack upon release therefrom. Also in this form of the invention the working face of the holding-dog and the face of the arm which coacts with the side of the rack make an angle with each other, and the notch thereby formed is so placed relatively to the pivot of the holding-dog that the line joining the axis of motion of the dog with the bottom or angle of the notch forms an angle with the plane of movement of the rack such that the device acts like a brace against the rack-tooth engaged thereby as long as a key is held down, whereby the usual force applied to the fingereseapranentmeelranismswtontrevntmgvnm'evwnkA, l ant overcome ie grea er chinos. force of the carrlage-drivlng spring, by which the rack is actuated.

The preferred form ofthe invention is illustrated in the accompanying drawings, forniing part of this specification, in which-n Figure l is a vertical central longitudinal sectional view of a Remington No. 6 typewriting machine with my improvements applied thereto. Fig. 2 is a detail view from the rear of the machine, showing my improved escapement mechanism in its normal position. Fig. 3 is an enlarged perspective view of the said form of the escapement mechanism in normal position. Fig. 4. is a plan view of a part of the dog-carrier and showing rack-teeth in section, the feed-dog being' in engagement with a rack-tooth. Fig. 5 is a similar View, but with the parts in the positions assumed in the arrestingl action upon the full depression of a key. Fig. 6 is a similar View showing the beginning of a return movement of the dog-carrier to its normal position and the releasing action of the holding-dog and rack-teeth. Fig. 7 is a similar view of a position of the parts at a later stage of the said return movement of the dog-carrier and showing a completion of the releasing action. Fig. 8 is a perspective View of,b the holding-dog, its spindle, and an arm for moving said dog about its axis of motion. Fig. 9 is a perspective view of a support for the holding-dog. Fig. l0 is a sectional view substantially on the planes indicated in Fig. l; by the lines X X and looking in the direction of the arrow thereon, showing the" feeddog, a rack-tooth, and other parts; and Fig. ll is a perspective View showing an arrangement of parts in conjunction with a straight rack.

The same reference character or numeral will be used to designate the same part in the various figures of the drawings in which the part appears.

1 indicates a base-frame from which rise the standards or posts 2; 3, a top or type ring to which type-bar hangers 4 are secured in any suitable way; 5, a type-bar pivoted in said hanger and joined by connection 6 with a key-lever 7; and 8, a rib under the top of base l, against which the notched key-levers are held by returning-springs 9, secured to the frame in a known manner.

10 is a space-key supported by levers 11, also fulcrumed on the rib 8.

12 is the usual universal bar, which is connected by rods 13 to arms 14, projecting forwardly from a shaft 15, journaled at 16 in a back plate 17 of the framework of the machine. A spring 18, secured at its ends to the plate 17 and to the shaft 15, acts to hold the arms 14 and universal bar 12 in their upper or raised positions, as usual. The shaft or rocker is provided with an upwardlyextending rocker-arm 19, and to the arm 19 is secured a dog-support 20. As shown in the drawings, the support 20 comprises a plate provided with an upward extension or back lug 21, a side lug or projection 22, and a perforation 23. A screw 24, which passes through perforation 23 of the d og-support 20, engages with a threaded hole in the arm 19 and firmly holds the support 2O against the arm, the lower squared end of the plate 20 fitting against a ledge or projection 25 on the rocker-arm 19, which may be. described as a dog rocker or carrier. A holding-dog 26, as illustrated in the drawings, projects forward and forms part of a plate or flat piece of metal 27, which is secured to a spindle 28 and extends away from the working face of the holding-dog 26, as at 29, so as to form an arm for a purpose presently to appear. rIhe spindle 28 fits snugly but movably in a vertical hole 30 in the lug 22 aforesaid, with the plate 27 resting on the top of the lug and the arm 29 overhanging the dogholder. The plate 27 is formed with a lug or extension 31, which is adapted to coact with an oblique face or stop 32 on the lug or extension 21 to'arrest the holding-dog in position with its Aworking face parallel to and in contact with the working face of a rack-tooth with which it may be in engagement. It is noted that when the lug 31 is against the stop 32 the working face of the dog 26 is in position to engage face to face with a rack-tooth and that the line of pressure between the dog and tooth at such p times does not pass through the aXis or pivot 28, but to one side thereof. rlhe tendency, therefore, is to turn the dog 26 about its pivot or aXis 28, as will be referred to hereinafter.

A feed-dog` 33 is pivoted to the rocker-arm 19 at 34 and is arrested at one limit of its motion by a lug or stop 35, integral with or attached to the arm 19. The feed-dog 33 is moved away from said stop 35 by a spring 36,

which is secured at one end to the arm 19 by a screw 37 and which bears at its` other end against the said dog 33 above its pivot 34. The spring 36 is bent at a point below the pivot 34,Y as at 38, to form a stop for coaction with an extension 40 on the dog 33 for limiting the motion of the dog 33 as it steps or moves into the position shown in dotted lines at Fig. 10. The dogs of the escapement coact with the teeth of a ratchet-wheel 41, preferably loose upon a shaft 42 and connected with the shaft by means of a backing ratchet or pawl and ratchet-wheel inclosed within the casing'43, as usual. The shaft 42 is journaled in a part 44 of the fixed framework of the machine and is provided at its forward end with a toothed wheel 45, with which a rack 46 engages. The rack 46 is carried by arms 47, which are pivoted at 48 to a carriage 49, guided on the bars 50 51. A platen 52 is supported in a tilting platen-carrier 53, which is connected with the carriage 49 in any suitable or usual manner for both tilting and shifting.

54 marks a shift-rod for shifting the platen rearward and frontward of the machine, the said rod coacting with a grooved wheel 55 and with a yoke or yokes (not shown) on the platencarrier.

56 indicates a detent provided with a sleeve 57, which is journaled on a screw-threaded bolt 58, by means of which the sleeve and detent are secured to the rocker 19. A spring 59 has one end inserted ina hole in the sleeve 57 and is coiled loosely about said sleeve and has its other end passed to one side of the arm 19 in such wise that the detent is held above the feed-dog 33 in the normal positions of the parts and in position to enter in the square notches 60 at the bases of the rack-teeth, thus preventing reverse rotation of the ratchetwheel 41 when the carriage is retracted.

The operation of the escapement hereinbefore described is as follows: (For convenience of description the rack-tooth with which the feed-dog is shown as being in engagement in Fig. 4 will be designated by a and the succeeding tooth by in Figs. 4 to 7, inclusive.) The feed-dog is normally in engagement with a tooth, as a, and upon the depression of a key the rocker-arm 19 is moved forward and the feed-dog is withdrawn from engagement with the tooth (t, and the holding-dog 26 is brought forward into position for catching the said tooth a, the said dog 26 being moved about its vertical aXis 28 by the contact of arm 29 against the side of a rack-tooth, as a, and the parts assume the position illustrated in Fig. 5, in which the stop-lug 31 is against the lug 32 and the working' face of the holding-dog is in contact with the working face of the tooth a. In this position of the parts the rack, and hence the carriage, are firmly held against motion. It will be observed (in Fig. 5) that the tooth at, under the influence of the driving-spring of the carriage, (indicated in TOO IIO

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dotted lines at 61,) tends to turn the holdingdog about its axis 28 and that this tendency is resisted in the machine by the dog 26 and arm 29 for the line joining pivot 28, and the angle (notch) between the working faces of the dog 26 and the arm or lug 29 is at such an angle to the movementoi the rack that the notched device acts like a brace, whereby the usual torce applied to the linger-keys will resist and overcome the greater torce ot the carriage-spring, by which the rack is actuated. It will also be observed in Figs. l to 7 that the distance between the point 62 ot the t'eeddog' and the point ot' the holding-dog is somewhat less than the width ot' a raelctooth and that the .stepping action of the feed-dog moves the feed-dog suiliciently far as to allow the tooth c to escape behind the same, as will presently appear. On the release of the depressed linger-key the rocker or arm 19 moves rearwardly, as indicated by the arrow in Fig. 6, and the dog 26 is turned about its axis by tooth a until the rack-tooth a escapes beyond its point and the dog is arrested by the contact of arm 29 with tooth as indicated in Fig. 7. The plate 27 continues to turn as long as the rack-tooth a is in engagement with the dog 26, the arm 29 followingI up or keeping in contact with the tooth (and mayhap with one or more) during such time. The arm 29 is pret`- crably curved to prevent the point of a downcoming rack-tooth trom engaging with the top ot' the free end of the arm and to prevent the end o1c the arm 29 from engaging with the tace of a rack-tooth. During the return motion of the arm 19 the feed-dog 33 enters the space between the teeth c and in readiness to catch the tooth and arrest the same and the carriage when the dog 33 has been carried against the stop 35. Ordinarily the holding-dog 26 and its plate 27 will be lel't in the position in which they7 are shown in Fig. 7 rather than in the position in which they are shown in Fig. 4. whence it results that upon the depression of a key thereafter the arm 29 is brought against the side of the 4rac'k and the dog 26 is moved from the position shown in Fig. 7 to the position shown in Fig. 5, so that it will be seen that the arm 29 coacts with the side of the rack to move the dog 26 in one direction and to arrest its motion in the other direction.` l/Vhen the arm or device 29 at an angle to the' dog 26 and forming therewith the aforesaid notch of the dog coacts with the rack-tooth to turn the dog 26 in raek-engag ing direction or in a direction opposite to that in which the dog is moved during the feed motion, it will be seen that if there has been a partial feed of the rack and carriage during a part o't' the downstrole olI the .key the turning oft' said dog in the manner described will elfect a retraction o't' the rack and carriage, so as to bring the paper back to the proper position for uniform space-printingln other words, both sides ot the notch oit the holding-dog are arranged to engage a racktooth at the same time, and this notch being so arranged relatively1 to the axis ot' the dog and the line in which it moves when approaching' the rack the pressure will cause the dog to swing in a direction opposite to that which theracl swings it when diseng'aging it, and hence the dog will carry with it the rack and carriage in a direction opposite to that in which they move when feeding letter-space distances. By this it will be seen that the dog may be swung in one direction during a depression ot' the linger-key and the carriage simultaneously returned to the printing position after having made a part of a letter-space movement, which movement occurs`when a legato stroke. is employed. From the foregoing it will be seen that the swinging' movement o'tI the dog 26 on its pivot is controlled by and is in conformity with the movement of the linger-key during the whole time of its engagement with the rack, whereby a movement ot' said pivot or axis toward the rack may elfect an independent swinging movement of the dog for the purpose ot' returning the carriage to the printing` position and whereby the carriage-release will 'be etlected in contormity with the movement of said pivot or axis away 'trom the rack, and which movement is controlled by the release of pressure upon the linger-key. lt is to be remembered, however, that this ismerely the preferred term or arrangement-preferred because it reduces the number ot' parts and simplilies the construction. Hence l do not limit myself in this part ot' my invention to the use o't` means coacting with the rack at either side thereof itor moving the plate 27 to bring' the exten` sion 3l against the stop 32, and so moving the dog 26 into position in which its working face coacts or may coact with the working 'face ot' a rack-tooth.

ln the modification illustrated at Fig. 11 the circular rack or ratchet-wluiel Ll1 is replaced by a straight rack or ratchet-bar al, the remaining parts being' as or substantially as in the case previously described and being similarly marked with rc'lerencemm merals. Hence no redescription of these parts is required. The operation is substantially the same as in the case already described and need not be further enlarged upon. In both cases the axis ol" motion of the dog 26 is parallel or substantially"paallel to and always out of the plane of the raclz and is at rightangles to the direction of motion ol the rack.

One important feature ot' my invention consists in combining with an independently-pivoted holding-dog a brake or pressure device adapted to bear against some part of the mechanism under the pressure of the carriagedriving spring, and thus arrest the holdingdog when it is in engagement with a tooth of the rack and while itis held over in such engagement by the downward pressure on a lin- IOO dei

ger-key, by which construction and arrangement immediately upon the release of a finger-key the pressure of said brake device is instantly removed to enable the rack and the carriage to start on their letter-space movement and in the movement of the rack to cause a forward movement of the holding-dog and enable it eventually to escape from the plane of action ofthe rack. For the purpose of obtaining a brake or pressure device it will be understood that only a very small portion of the arm 29 adjacent the holding-dog 26 need be employed; but as far as this feature of my invention is concerned the brake or pressure device may be elsewhere located. By employingthe elongated arm 29 it performs several functions: First, it servesas the brake or pressure device aforesaid; secondly, as a means for limiting the forward motion of the holding-dog during the escaping action of a rack-tooth, and, thirdly, it is adapted to perform the oiiiceof bringing the holding-dog back to a normal or engaging position to encounter the neXt tooth of the rack upon a forward vibration of the rocker during the downstroke of a key. On referring again to Fig. where the rocker is illustrated in its forward position, to which it is brought by thel depression of a key, it will be observed that the rack-tooth t is pressing' against the face of the holdingdog under the force of the carriage-driving spring, which could move said dog forward or turn it about its pivot but for the fact that the root end of the arm 29 at its junction with the holding-dog is caused to press against the side of the tooth t under the full force of the carriage-driving spring acting through the rack and the holding-dog. rlhus while the parts are in the position shown at Fig. 5 the rack and the carriage are held immovably by a brake or pressure device acting under the force of the carriage-mainspring. From this it will be understood that immediately the pressure upon the finger-key is released and the dog-holder is allowed to recede bodily the brake or pressure device is moved away from the side of the Arack and instantly' the holding-dog is free to yield under the pressure of the tooth and to quickly assume the position shown at Figs. 6 and 7 and permit the escape of the rack-tooth, and hence the letter-space movement of the paper-carriage. It will also be understood that I have provided a constructioncwherein the holdingdog is pivoted to move freely on its carrier and is free from spring-pressure and adapted to remain in the position to which it is moved until moved from such position solely by the coaction of the holding-dog member with the feed-rack, and that this is true whether the holding-dog is moved to the releasing position (shown in Fig. et or 7) or is in the engaging position. (Shown in Fig. 6.) Furthermore, it will be seen that in bringing about this movement of the holding-dog to and from the engaging position one portion of the holding-dog (the part 29) is adapted to coact `with a side of the feed-rack or with the sides of the teeth thereof to turn the dog on its pivot and bring the engaging portion 26 thereofinto the path of a tooth of the rack, said portion 26 being adapted to coact with the working faces of the teeth of the feed-rack.

Thile I have described my new holdingdog as employed in conjunction with a stepping feed-dog, I do not limit myself to such use, inasmuch as there are many forms of feed-dogs, and my holding-dog may be used in conjunction with any suitable form of feeddog; nor do I limit myself to the use of an arm, as 29, coacting with the rack for stopping the turning movement of the holdingdog while traveling in contact with a racktooth, for I may employ a lug 63 on plate 27 and coacting with the extension 21, as indicated in dotted lines on Fig. 7, for this purpose, while also employing arm 29 or other means for moving plate 27 in the contrary direction to bring lug 3l against stop 32 and the dog 26 into position for coaction face to face with the neX't'rack-tooth. In this last case when stop 63 is employed the arm 29 does not continuously follow the rack up, but is arrested with dog 26 by said lug 63 and lug 21 before the rack-tooth, as a, wholly escapes from the said dog 26.

Various changes in detail construction and arrangement of parts may be made without departing from the principle of my several improvements and some of which may be used without others.

What I claim as new, and desire to secure by Letters Patent, is

l. In a type-writing machine and in an escapement mechanism, the combination of a power-driven carriage, a rack, and a holdingdog notched to engage with the faces of the rack-teeth and mounted to be moved by said teeth during the escape action, whereby the escape action is quickened, substantially as described.

2. In a type-writing machine and in an escapement mechanism, the combination of a power-driven carriage, a rack, and a holdingdog notched to engage with the faces of the rack-teeth and mounted to be moved by said teeth during the escape action in a plane perpendicular or substantially perpendicular to the plane of the rack, whereby the escape action is quickened, substantially as described.

3. In a type-writing machine and in an escapement mechanism, the combination of a power-driven carriage, a rack, and a notched holding-dog pivoted on an axis parallel or substantially parallel to and out of the plane of the rack and normally out of engagement with the rack, and adapted to hold the rack while there is pressure upon the key, and adapted also to be swiveled by the rack upon the release of said key pressure.

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4C. In a type-writing machine and in an eseapement mechanism, the combination oi'I a power-driven carriage, a rack, a holding-dog adapted to engage with the faces of theraclteeth and mounted to be moved by said teeth during the escape action, and means engaging with the rack t'or arresting the motion ot' the dog when so moved by the said teeth, substantially as described.

5. In a type-writing machine and in an escapement mechanism, the combination of a power-driven carriage, a rack, a notched holding-dog adapted to engage with the faces of the rack-teeth and mounted to be moved by said teeth in a plane perpendicular or sub stantially perpendicular` to the plane oi' said rack-teeth, and means for arresting said dog in said movement.

6. In a type-writing machine and in an escapement mechanism, the combination of a power-driven carriage, a rack, a holding-dog pivoted on an axis parallel or substantially parallel to and always out of the plane of the rack and adapted to move about said axis while in engagement with the raclcteetlnand means ior arresting said dog insuch movement.

7. In a type-writing machine and in an escapement mechanism, the combination ol a power-driven carriage, a rack, a holding-dog adapted to engage with the faces of the rackteeth and mounted to be moved during the escape action by said teeth in a plane perpendicular or substantially perpendicular to the plane of said teeth or rack, and means coperating with the rack for returning said dog to position in which its working face may coact with the working face of the next or a succeeding raclctooth.

8. In a type-writing machine and in an escapement mechanism, the combination oi' a power-driven carriage, a rack, anotched holding-dog pivoted on an axis parallel or substantially parallel to and always out of the plane of the rack and adapted to be turned about said axis by the rack-teeth during the escape action, and means for returning said dog to position in which its face may engage with the taceotl the nextorasueceeding racktooth.

9. 1n a type-writing machine and in an eseapement mechanism, the combination oi' a power-driven carriage, a rack, a holding-dog adapted to engage with the faces of the rackteeth and mounted to be moved during the escape action by said teeth in a planeat or substantially at right angles to the plane of said teeth or rack, means for arresting said dog in such motion, and means ior returning said dog to position in which its working face may engage with the working faceofasucceeding rack-tooth; said returning means being arranged to act during a rack-engaging movement ot said dogl at the time a printing stroke is made.

lO. In a type-writing machine and in an escapement mechanism. the combination of a power-driven carriage, a rack, a notched holding-dog pivoted on an axis parallel or substantially parallel to and always out of the plane ot' the rack and adapted to be turned during the escape action on or about said axis by the rack-teeth, means for limiting such motion, and means cooperating with said rack for returning said dog to position in which its working `face may coact with the working 'face of the next tooth.

11. In a type-writing machine and in an es capement mechanism, the combination of a power-driven carriage, a rack, a holding-dog pivoted on an axis parallel or substantially parallel to and out oi' the plane ot' the rackteeth,and having a limited motion on said pivot in one direction while in engagement with the rack-teeth, and means cooperating with said rack for moving said dog in the contrary direction and into position for engagement with succeeding rack-teeth.

12. In a type-writing machine and in an escapement mechanism, the combination of a power-driven carriage, a rack, a holding-dog pivoted to move in a plane at or substantially at right angles to the planeetl the rack, and an arm or part connected with said dog and coacting' with the rack to return said dog to position in which its working face engages with the working t'ace of a succeeding tooth.

13. .In a ty pe-writing machine and in an escapement mechanism, the combination oi a power-driven carriage, a rack, a holding-dog pivoted on an axis parallel or substantially parallel to and out of the plane of the racl; and moved by the rack-teeth about said axis in one direction, and an arm connected with said dog and on the same side of said axis as said dog and eoacting with the rack to arrest said motion of said dog and to move the said dog on said pivot in the contrary direction to bring its working face into position in which it will engage with the working face oi' asueceeding tooth.

14. In a type-writing machine and in an escapement mechanism, the combination of a p0werdriven carriage, a rack, a `feed-dog normally in engagement with said rack, and a notched holding-dog adapted to engage with the faces of the rack-teeth and hold the same while the printing-key is under pressure and mounted to be moved by said teeth duringl the escape action, whereby the escape action is quickened.

15. In a type-writing machine and in an escapement mechanism, the combination of a rack and a swiveling holdingdog having its axis arranged to move to and from the rack and having' a notch to engage the rack.

16. In a type-writing machine and in an escapement mechanism, the combination of a rack. a holding-dog adapted to engage with the faces oi' the rack-teeth and mounted to be IOO IIO

moved by said teeth to a position to release l the tooth with which itis in engagement, and means adapted to bear against the rack and to hold the dog from so moving until the pressure on the linger-key is released.

17. In a type-writing machine and in an escapement mechanism, the combination of a rack, a holding-dog having a pivot parallel or substantially parallel with the rack and out of the plane thereof, the face of said dog being adapted to engage with the faces of theI rack-teeth and to be swiveled thereby when the linger-key is released, and means for holding said dog in engagement with the rack against such swiveling movement until the pressure on the linger-key is released.

18. In a type-writing machine and in an escapement mechanism, the combination of a power-driven carriage, a rack, a holding-dog having a pivot which is parallel or substantially parallel to the plane of the rack and Which is out of the plane thereof, said dog being adapted to engage the faces of the rackteeth when the printing-keys are depressed, and means carried by said dog for engaging the rack and preventing said dog from swiveling when the printing-keys are held down.

19. In a type-writing machine and in an escapement mechanism, the combination of a power-driven carriage, a rack, a holding-dog having a pivot which is parallel or substantially parallel to the plane of the rack and which is out of the plane thereof, said dog being adapted to engage the faces of the. rackteeth when the printing-keys are depressed, and a device contiguous to said dog and adapted to engage other portions of the rack-teeth and prevent the dog from swiveling as long as the finger-keys are held down.

20. In a type-writing machine and in an escapement mechanism, the combination of a power-driven carriage, a feed-dog, and a pivoted, notched holding-dog, the pivot being so arranged that when the holding-dog is in engagement with the rack a line drawn from the notch to the pivot will be oblique to the plane of said rack and the rack will be prevented from moving until the finger-key is relieved of pressure. f

2l. In a'type-Writing machine and in an escapement mechanism, the combination of a power-driven carriage, a rack, a pivoted holding-dog, a stop for arresting the dog in position such that its working face will engage with the faces of the rack-teeth and such that the pressure between the dog and the tooth with which it is engaged tends to turn the dog on its axis, and an arm rigidly connected with said dog and coacting with the rack to move said dog until the motion of the dog is arrested by said stop.

22. In a type-Writing machine and in an escapement mechanism, the combination of a power-driven carriage, a rack, a pivoted holding-dog, a stop for arresting the dog in position such that its Working face wil'lf engage with the faces of the rack-teeth land such that the pressure between the dog and the tooth with which it is engaged tends to turn the dog on its axis, and an arm on the-same side of said axis as said dog and making' an angle with the working face of said dogand coacting with the rack to move said dog until the motion of the dog is arrested by said stop.

23. In a type-writing machine and in an escapement mechanism, the combination of a power-driven carriage, a rack, a pivoted holding-dog, and an arm on the same side' of said axis as, and making an angle with the working face of the dog and coacting with the rack to move said dog into position such that its working face is parallel to and engages the working' face of a rack-tooth as the motion of said arm and tooth one along and in contact with the other comes to an end.

24. In a type-writing machine and in an escapement mechanism, the combination of a power-driven carriage, a rack, a pivoted holding-dog, an arm on the same side of said axis as, and making an angle with the working face of the dog and coacting with the rack to move said dog into position such that its working face is parallel to and engages the working face of a rack-tooth as the motion of said arm and tooth one along and in contact with the other comes to an end, and-a stop for arresting the motion of the dog when so moved by the rack and said arm and at or before the movement the rack-tooth engages with said dog.

25. In a type-writing machine and in an escapement mechanism, the combination of a power-driven carriage, a rack, a pivoted holding-dog, and an arm or lug adjacent said dog, the working face of the dog and a'face of said lug or arm forming a notch for coacting with the working face and a side of each racktooth, the said notch being so arranged relatively to the pivot of the dog as that the dog and arm or lug act as a brace to hold the carriage while a key is held down by the finger.

26. In a type-writing machine and in an escapement mechanism, the combination of a power-driven carriage, a rack, a pivoted holding-dog, and a brake or pressure device whereby the holding-dog is arrested or prevented from moving from rack-holding position and the rack is prevented from moving as long as the brake or pressure device is in action.

27. In a type-Writing machine and in an escapement mechanism, the combination of a power-driven carriage, a rack, a feed-dog normally in engagement with the rack, a pivoted holding-dog and a brake or pressure device adapted to arrest and retain the holding-dog in rack-holding position until the depressed finger-key is released.

28. In a type-writing machine and in an escapement mechanism, the combination of a power-driven carriage, a rack, and a pivoted TOO i reefze notched plate or bar, the sides of the notch each being` at an angle to the line joining' the axis of motion and bottom of the notch and. adapted to coact with each rack-tooth as a brace or stop and brake.

29. In a type-writing machine and in an escapement mechanism, the combination of a power-driven carriage, a rack, a dog-carrier` a holding-dog pivotally connected with said carrier and brought into the plane of the rack and into engagement with a rack-tooth on the depression ot' a key, said rack tending to tu rn said dog on its pivot, and a brake or pressure device acting to prevent said dog from being' so turned as long as the key is held down but permitting the Adogand carriage to move immediatelvthe key is released.'

30. In a type-writing' machine and in an escapement mechanism, the combination with a power-driven carriage and a rack, of a rockerarm and a notched dog pivoted thereon and adapted to hold the rack while in engagement therewith and during the pressure upon the linger-key, and also adapted, while disengaging from the rack, to have a swiveling or pivoted motion independently ot' said rockerarm.

31. In a type-writing machine and in an escapement mechanism, the combination ol a power-driven carriage, a rack, a pivoted dogrocker, a spring-pressed feeding-dog 33 pivoted thereon, and aholding-dog 26 on a plate 27 having' a vertical pivot or stem 28 and an arrn`29, the said pivot or stem being' mounted in a bearing at the upper end of said dog'- roclrer. Y

3Q. In a type-writing machine, the combination of a feed-rack, and cooperating feed devices including a dog-carrier and a holdingdog that is Vfree to move independently of its carrier and to remain in the position to which it is moved.

In a type-writing machine, the combination of a feed-rack, and cooperating' escapenient devices including' a dog-carrier and a holding-dog pivoted to its carrier and free from spring'-1:n'essure.

34. In a type-writing' machine, the combination ot' a feed-raclnand cooperating escapement devices including a dog-carrier and a holding-dog that has two portions, one of said portions cooperating with the sides of the teeth of said rack and the other portion cooperating with the working faces of said rackteeth.

35. In a type-writing machine, the combination ot' a feed-raclnand cooperating escapement devices including a dog-carrier and a holding-dog that is pivoted to its carrier and is moved on its said pivot to bring it into engagement with the feed-rack by the coaction of the dog' with the rack.

36. In a type-writing machine, the combination of a feed-rack, and cooperatingI escapement devices including' a pivoted holding-dog with one portion oi' which the feed-rack engages to turn the dog on its pivot and force another portion thereof into the path of a tooth of said rack.

37. In a type-writing machine, the combination of a 'feed-1'ack,and cooperating escapement devices including a pivoted holding-dog that is free from spring-pressure and with one portion of which the feed-rack engages to turn the dog on its pivot and force another portion thereof into the path of a tooth o'fisaid rack.

38. In a type-writing machine, the combination of a 'feccl-1acl,aiid cooperating' escapenient devices including a carrier and a holding-dog that is pivoted to its carrier and is swung on said pivot both into and out of engagement with said rack solely by the coaction between the rack and holding-dog.

39. In a type-writing' machine, the combination of a -i'ced-raclnand cooperating escapement devices including' a dog-carrier and a holding-dog that is movably mounted on its carrier and is constructed and arranged to be forced by the coaction oi' the rack therewith into the path of a tooth or' the rack and to be forced by the coaction of the rack therewith out of the path oi" a tooth of the rack.

4:0. In a type-writing machine, the combination oi a power-driven carriage,a feed-rack therefor, a feed-dog that is adapted to vibrate transversely of said rack, and a holding-dog that is brought into the path of a tooth of the feed-rack by first being brought into contact with a side of said rack.

41. In a type-writing' machine, the combination of a power-driven carriage, a feed-rack therefor, a dog-rocker, a feed-dog carried by said dog-rocker, a holding-dog pivoted to said dog-rocker and free from spring-pressure.

42. In a type-writing' machine, the combination of a power-driven carriagc,afeed-rack therefor, a dog-rocker, a feed-dog carried by said dog-rocker, a holding-dog' pivoted to said dog-rocker and adapted to remain in the position to which it is moved.

Signed at Ilion, in the county of Herkimer and State of New York, this 30th day of I )ecember, A. I). 1898.

LOUIS I). DISS.

Witnesses:

(I1-ms. E. MAURICE, RALri-i' W. (ionen.

IIO

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