US1370772A - Typewriting-machine - Google Patents

Description

0. WOODWARD.

TYPEWRITING MACHINE.

APPLICATION man MAY 29, 1919 Patented Mar. 8,1921.

4 SHEETS-SHEET 1- WITNESSES (4%! Hi5 ATTEIRNEY 0. WOODWARD. TYPEWRIil'iNG MACHINE- APPLICATION FILED MAY 29, 1919.

4 SHEETS-SHEET 2- INVENTUR MM Patented Mar. 8, 1921.

H15 ATTORNEY Patented Mar 8, 1921 4 SHEETS-SHEET a INVENTDR HIS ATTORNEY 0. WOODWARD. TYPEwmTme MACHINE. APPLICATION FILED MAY 29 I919 WITNESSES 4%4% 0. WOODWARD. T YPEWRITING MACHINE.

APPLICATION FILED MAY29,1919.

1,370,772. Patented Mar. 8, 1921.

'4 SHEETS-SHEEI 4.

- n I m 1 Q 5 g S \\\\\W E E i WITNESSES v INVENTDR @M 9% HIE ATTURNEY UNITED STATES PATENT I OFFICE.

OSCAR woonwann, or BABYLON, NEW You, ASSIGNOR'TO REMINGTON 'rYrEw'mrEn conrm, or 112101;, NEW YORK, A conronarron or NEW YORK.

mnwm'rme-iracmmz.

Specification of Letters Patent.

Patented Mar. 8, 1921.

Application filed 11293.29, 1919. Serial No. 800,571.

ple and strong construction which is reliable and effective 1noperation, which is not apt to become disarranged or broken, and which is easy to assemble and mount in the machine or to be detached therefrom when desired. More specifically stated, one of the main objects of my invention is to provide a construction in which various parts may be assembled outside of the machine and readily introduced therein as a single unit, or may be detached 'as a single unit, or in which various parts or combinations may be detached independently of others when desired. To the above an other ends which will hereinafter appear, my invention consists in features of construction, arrangements of artsand combinations ofdevices set forth 1n the following description and particularly pointed out in the appended claims.

In the, drawings wherein like reference characters indicate corresponding parts in the various vlews,

Figure 1 is a fragmentary vertical sec tional view showing a portion of the back space mechanism and some of the associated parts, the section being taken on the line w w of Fig. 2 and looking in the direction of the arrow at said line.

Fig. 2 is a fragmentary top plan view with parts in section of the complete back space mechanism and some of the associated parts. a

Fig. 3 is a side elevation of the same with parts in section.

"Fig. 3 is a fragmentary front view of the guide comb and some of the associated parts. Fig. 4 is an enlarged fragmentary detail sectional view showing a modified form of buffer which co-acts with the adjustable stop to limit the return movement of the back space means to normal position.

Fig. 5 is an enlarged detail transverse sectional view showing the detachable connection between the back space means and the actuating means therefor, the section being taken on the line w a: of Fig. 1 and looking in the direction of the arrow at said line.

F1g. 6 is an-enlarged detail perspective view with parts in section of the connected brackets secured in place and some of the parts carried thereby.

Fig. 7 is an enlarged detail vertical fore and aft sectional view of a part of the construction, the view being taken on the line 3 y of Fig. 9 and looking in the direction of the arrow at said line.

Fig. 8 is an enlarged detail rear view of the escapement wheel shown mounted on its shaft.

Fig. 9 is an enlarged detail fragmentary transverse sectional View of the parts shown in Fig. 7, the section being taken on the line 2 a of Fig. 7 and looking in the direction of the arrow at said line.

The invention may be embodied in various styles of typewriting and like machines and in the present instance is shown embodied in a machine like the No. 10 or No. 11' Remington machine.

The main frame of the machine comprises abase 1, corner posts 2 and a top plate 3. A platen 4 is carried by a suitable carriage mounted to move from side toside over the top plate of the machine. The carriage carries the usual feed rack 5 which meshes with a feed pinion 6 to control the step-by-step letter feed movements of the carriage, and

also to control the step-by-step back spacing movements thereof. The operation of the pinion in one direction is controlled by the letter space mechanism, whereas the intermittent back spacing movements of the pinion in the opposite direction are controlled by back spacing mechanism, as will hereinafter more clearly appear. I

So far as the main features, of the present invention are concerned the back spacing mechanism may be actuated by any suitable key controlled actuating devices in the base of the machine. In the present instance the back spacing lever 7 is fulcrumed at 8 in the base of the machine and is returned to its normal positionby a returning spring 9. A key 10 is provided at the forward end of the lever 7 at the keyboard. of the machine to control the actuation of the back spacing mechanism. An abutment 11 on the lever 7 coacts with a vertically adjustable pin or stop 12 carried by a sheet metal cross bar 13 secured to the base of the machine. The pin 12 limits the depression of the key lever 7, whereas its return movement is limited by a projection 14 on the key lever co-acting with a pad 15 carried bya cross bar 16 forming part of or secured to the base of the machine.

The sto pin 12 in the present instance is threaded .mto a tap ed opening in the cross bar 13 and is locked in its adjusted position by a lock nut 12*, as best shown in Figs. 3 and 3*. In order to provide suflicient stock 'in which to screw the pin, I prefer to reinforce the sheet metal cross bar with an additional strip of metal 13 which is secured to the cross bar, preferably by welding, and is tapped with it to receive the threaded pin 12. The length of the reinforcing strip need be only sufficient to receive several closely related pins similar to the pin 12; the other pin shown in Fig. 3 being employed to limit the depression of the adjacent case shift key, for example. It will be I observed that these stop pins are so close together that the lock nuts, such as 12 cannot be arranged side by side. I therefore place the lock nut of one pin above the cross bar and the lock nut of the next pin below the cross bar, thus effecting a staggering overlapping arrangement of the nuts that enables them to be placed in position and adjusted without interference one with another.

A forward guide comb 16 for the key levers receives the back spacing lever 7 between adjacent teeth thereof as shown in Figs. 3 and 3. More force is usually exerted on the back spacing key than is applied to the printing keys. In order that lateral pressure exerted by the lever 7 on its coacting teeth of the comb will not result in spreading the teeth apart, I connect such teeth together'at their lower ends, as at 16*, so that these teeth are connected at their lower ends as well as at their upper ends, and efi'ectivel resist any tendency to spread them apart y the action of the lever 7- thereon when in use.

An upwardly extending arm 17 on the key lever 7 is pivoted to an upwardly and rearwardly extending two-part link 18 by a shouldered ivot screw 19. From an inspection of ig. 3 it will be seen that the point of connection 19between the lever 7 and the parts controlled thereby is above a straight line extending through the key 16 and the fulcrum 8 of' the lever. Moreover, from an examination of Fig. 2 it will be seen that the link 18 is in the plane of movement of the lever 7. The result of this construction is that an actuation of the back spacer may be efiected without any tendency to tilt the lever 7 laterally, and a direct straight line pull on the link and on the part to which it is connected at its upper end, is produced, thereby avoiding all lateral strain and binding of the arts.

rock shaft is received and supported in bearings in depending lugs 25 on the top plate of the machine. A collar 26 is fixed to the shaft 2/1. by a screw 27. .From an inspection of Fig. 2 it will be seen that the arm 21 is arranged on the shaft outside of one of the depending supporting lugs 25, whereas'the collar 26 is arrangedon the shaft inside of said bearing lug, the arm or its hub co-acting with a lug on one side and the collar coacting with a lug on the opposite side to prevent or limit the longitudinal displacement of the shaft 24 in its bearings. A coiled spring 28 surrounds the shaft 24 and bears at one end, as at 29, against a depending bracket arm 30 on the top plate. The

other end 31 of the spring is turned around 1 the screw '27, thus in effect connecting this end of the spring to the shaft. The inner end portion of the shaft 24 carries a rearwardly and downwardly extending crank arm 32 provided with a hub 32 secured to the shaft by a screw 32*. The crank arm at its rear end carries a bearin V or member 33, as best shown in Fig. 5. his member has a reduced portion 34 by which a shoulder 35 is formed on the member. The reduced portion 34 constitutes a hearing which is received in an aperture in the lower end of a link 36. The link is retained against displacement from the bearing portion of opening in the member and the head of which extends beyond the reduced portion 34 to revent the link from being displaced there rom except when the screw 37 is removed. This construction provides means for detachably connecting the back space actuating means comprising the lever 7 link 18, rockshaft 24: and its crank arms 31 and 32 from the link 36 and the back space means of which the latter may be said to form a part. It will be seen, moreover, particularly from an inspection of Figs. 1 and 3, that the location of this connection between the crank arm 32 and the link 36 extends below the top plate, and below the various supporting brackets, etc., carried thereby, a sufiicient distance to enable ready access to be had to the connection from outside the machine without interference by the parts referred to.

The means for supporting the back spacing means and the escapement mechanism constitutes an important feature of the present invention and maybe said to comprise in the main two brackets, one a main bracket 39 and the other an auxiliary bracket 40. The bracket 39 is detachably secured to the toppllate of the machine by two screws 41 w ic extend from above through openings in the top plate and are received in 'tapped openings 42 in the bracket 39.

This bracket constitutes a support for a detachable dog rocker or carrier 43, one trunnion of which is pivotally supported on the bracket by the coned end of a screw 44 received in a tapped opening in an arm 45 of the bracket and secured in its adjusted position by a lock nut 46. The other trunnion of the dog rocker is supported in place b the coned end of a pivot pin 47 seated in a earing opening in an arm 48 of the bracket. The pin 47 is held in position in its bearing by a set screw 49 received in a tapped opening in the arm 48 and bearin at its inner end against the pivot pin. y loosening the screw 49 the pin 47 may be withdrawn from engagement with the dog rocker and the latter may thus be readil detached from its supporting bracket 39. 11 order to further facilitate the removal of the dog rocker, a depending arm 50 adjustably secured thereto is detachably connected to the dog rocker actuating means in a manner disclosed in my application Serial No. 278,657 filed February 24, 1919. In Fig. 6 of the drawings I have shown enough of these connections to illustrate how the dog rocker may be readily detached when the pivot pin 47 is withdrawn from coiiperation with the dog rocker. Thus it will be seen that a motion transmitting link 51 is forked at its rear end, as at 52, and coiiperates with a headed pin 53 carried by the depending adjustable arm 50 on the dog rocker. This connection, as will be readily understood, enables the dog rocker to be detached from the link 51 and the actuating means which are operative on the link. The bracket 39, it will be observed, is detachably secured to the top plate of the machine and extends below the same, whereas the bracket 40, hereinbefore referred to, extends above the top plate through an opening 3 therein. The bracket 40 receives its support on the bracket 39 and is detachably secured to the latter by screws 54 and 54. A portion of the bracket 40. is in the nature of a yoke providing a bearing 55 in one ofthe arms thereof in which a reduced cylindrical bearing 56- of an escapement wheel shaft 57 is received and adapted to hear. The other arm of the yoke-like portion of the bracket is formed with a split bearing 58 adapted to receive a sleeve or bearing member 59. The bore or cylindrical opening in which the member 59 is received is shown in the present instance as smooth, though it'may be otherwise formed if desired, and permits an axial adjustment of the member 59 therein. A headed screw 60 passes freely through an openin in a depending lug at one side of the sp it bearing and is received in a tapped opening in a depending In at the opposite side of the hearing, as ilustrated in Fig. 6. This last mentioned lug is formed rigid with the bracket 40, so that such movement as takes place between the lugs is due wholly to the movement of the other lug toward or away from the fixed lu The purpose of this construction is to a ways maintain the bearing member 59 properly centered against a fixed portion of the split bearing in which it is received. By turning the screw 60 in one direction the movable side of the bearing may be drawn toward the fixed side to effectively clamp the bearingmember 59 in place, and in the position to which it may be axially adjusted in the bearing. The bearing member 59 is adapted to receive a reduced cylindrical bearing portion 61 on the shaft 57, and thus support the shaft in position. The reduced ends or bearings 56 and 61 at their points of joinder with the shaft 57 form shoulders, one of which bears against the bearing member 55 to receive the thrust of the shaft in one direction, and the other of which bears against the inner end of the bearing member 59 to receive the thrust of the shaft in the opposite direction. By a proper adjustment of the bearingmember 59 lengthwise movement or end shake of the shaft is prevented. The feed pinion 6, hereinbefore referred to, is preferably formed as a part of a sleeve 62 provided at its opposite end with an integral ratchet wheel 63. The combined feed pinion 6, sleeve 62 and wheel 63 receives a bearing on the escapement wheel shaft only at 64 and 65, the sleeve bein free from contact with the shaft interme iate these two bearing portions. The sleeve may be provided with an il inlet 66 which enables oil to be introduced into the small chamber 67 intermediate the sleeve and shaft and between the bearing portions 64 and 65, so that oil introduced through the opening 66 may be fed to these bearing portions 64 and between the sleeve and shaft. An escapement wheel 68 is provided, with an enlarged central opening by which it may be seated on a hub 69 and against a circular flange 70 which pIrojects from the hub at one side thereof.

eaded screws 71 extend through openings in the escapement wheel and are received in tapped openings in the flange 70, thus securing theescanement wheel to its hub. Set screws 72 extend through tapped openings in the outwardly extending end 69 of the hub 69 and bear at their ends against.

flat sides 73. of the shaft, thus fixedly connecting the escapement wheel to turn with the shaft. The wheel 63 hereinbefore referred for cooperation with a back spacing pawl,

whereas the inner end portions 77 of the teeth form internal teeth, so to speak, for

cooperation with a pawl 78 contained within to the the wheel. It is in this sense that I have referred to the wheel 63 as a double wheel, one pawl co-acting with the teeth from the outside thereof and another pawl 78 co-acting with the teeth from the inside of the wheel.

This double wheel and the manner of forming the teeth thereon was not invented by me and is not claimed herein. The pawl 78 is mounted on a pivot pin 79 carried by and riveted to the hub 69 of the escapement wheel. The tail of this pawl is provided with an enlarged opening 80 adapted to receive one end 81 of a bow, or substantially semi-circular spring 82. The opposite end of this spring is connected to and has a slight ivot'al movement on a pin 83 riveted hub of the escapement wheel and projectin into'the recess in the double wheel 63. rom an inspection of Fig. 9 it will be seen that the diameter of the opening 80in the pawl is greater than the. diameter of the wire spring received therein, so that the spring bears only at one end against the bottom wall of the opening 80 and cannot interfere with the pivotal movement of the pawl. The tension ofthe spring 82 is exerted so that the free end thereof tends' to be drawn toward the pin 83, thus exerting a force which tends to turn the pawl on its pivot, so that the engaging projection .84 on the pawl will seat itself between the teeth and engage the inner edge portions 77 thereof. This construction causes the escapement wheel and the double wheel 63 to turn together in one direction, but enables the wheel 63 to be turned in the opposite direction, independentl of the escapement wheel. By formin t e double wheel in the manner specified, fam enabled-to in effect provide a single series of teeth to do the work of two wheels or two separate sets of teeth, thereby easily overcoming a difficult problem of cutting teeth within a recess in the wheel; cutting but one set of teeth instead of two"; avoiding the inaccuracies in relative spacing and registration which are bound to follow from separately cutting two independent sets of teeth, and reduclng inaccuracies in cutting to a minimum.

The pawl and ratchet mechanism including'the spring 82 and the manner of con; necting it with the pawl are not claimed herein but are claimed in my divisional case Serial No. 368,839 filed March 26, 1920.

Coiiperating with the back spacing wheel is a back space pawl 85 pivoted at 86 to a pawl carrier lever or member 87 which in turn is pivoted at 88 to an upright arm 89 of an auxiliary support or bracket 90 detachably secured by screws 91 to the bracket 40. The engaging nose 92 of the pawl cooperates with the teeth of the back space wheel to turn the wheel one step at each depression of the back space key, as will hereinafter more clearly appear. It will be seen that the member 87 which carries the pawl is pivoted to its support at the left or at one side of the back spacing wheel and extraneous to the center thereof and passes beneath the escapement wheel shaft and does not interfere with the independent removal of the latter. A coiled contractile spring 93 is connected at one end to a pin 94 projecting from the auxiliary bracket 90 and at its opposite end to a pin 95 projecting from the member 87. The member 87 extends beyond its pivot where it is provided with a turned over bearing portion or lip 96. This is covered with felt or some such material at 97, where it is adapted to bear against an enlargedhead 98 of an adjustable screw or stop 99. This screw is received and extends through a tapped opening in the arm of the yoke-like portion of the bracket 40 and may be secured in its adjusted position on the bracket arm by a lock nut 100. The screw stop co-acting with the member 87 limits the retlirn movement of this part, and the elements connected therewith, to normal position, the parts being returned to such position by the spring 93 hereinbefore referred to. The upper end of the link 36, which as previously pointed out is detachable at its lower end to the back space actuating means, is pivoted at 101 to the back space pawl. A pin 102 projects laterally from the link 36 and is adapted to coact with one edge of the back space pawl when the parts complete their back space operation, thus locking the pawl against further movement while it is in engagement with the back space wheel, and thereby preventing an overthrow of the wheeland the carriage controlled thereby.

The member 87 preferably carries a pin 103 which projects forwardly therefrom over an arm or lug 104 of a locking device designated as a-whole by thereferencenumeral 105. This locking device is ivoted at-106 on a bracket 107 secured to t e rear carriage rail 108. Aspring 109 tends to turn the locking device 105 on its pivot to the locking position where the hook-like end 110 of the locking device-extends over the feed rack 5 and prevents a disengagement that when the member 87 is liftedthe pin 103 will be elevated, thus enabling the spring 109 to turn the locking device into operative position, bringing the hooked end 110 thereof over the feed rack. As the member 87 returns again to normal position the pin 103 descends, carrying with it the arm 104 and moving the device 105 to the normal position shown in Fig. 3 where it is held out of cooperation with the feed rack. This device is somewhat similar to that emplo ed in the Nos. 10 and 11 Remington mac ines, the purpose and effect of the device in both cases being the same.

In an operation of the back spacing mechanism a depression of the key 10 is effective to rock the shaft 24 and effect an upward movement of the link 36. This movement is transmitted to the back space pawl 85, turning the latter on its pivot 86 into engagement with the back space wheel at the first portion of the stroke. A further movement of the parts is effective to cause the pawl carrying member 87 and the back spacing wheel to move together, the member 87 turning on its pivot 88. At the comple tion of the back spacing movement the pin 102 on the link 36 and the edge of the pawl 85 are brought into engagement, thus preventing the pawl from.be1ng forced out of engagement with the wheel and locking the wheel against overthrow. The back spacing movement thus transmitted to the wheel 63 is effective to turn it and the feed pinion 6 in a direction opposite to that which it ordinarily receives in a step-by-step letter feed movement of the carriage and to cause the carriage to receive a letter'space movement to the right. As hereinbefore explained, a depression of the key is effective to release the lock 105 and permit it to be moved by its spring 109 to a locking position, thereb preventing a disengagement of the feed rac 5 from mesh with the feed pinion 6, and when pressure on the back spacing key is released, the lock will be restored to normal or releasing position.

In Fig. 4 I have shown a modified form of bufi'er construction for limiting the return movement of the back spacing means. In this construction a piece of felt or like material 97 is riveted or otherwise secured at 111 to one side of the sheet metal member L12 which is the same in all respects as the member 87, except that it is not turned to form a bearing lip 96 but has the buffer serious parts carried thereby, may be assemcured thereto against one side to present the bufferedgewise for cooperation with the head 98 of the adjustable stop or screw 99-.

From the foregoing description it will be understood that the dog rocker may be mounted and adjusted on the dog rocker bracket outside of the machine; that the auxiliary bracket 40, together with the vabled out of the machine and secured to the bracket 39; that the various parts carried by both brackets may be assembled and adjusted relatively to each other, and all the parts introduced as a single unit into the machine, being detachably secured to the.

top plate thereof by the screws 41. It will be seen,moreover, that if desired the escapement wheel shaft and the parts carried thereby may be inde ndently detached from the machine; that t e dog rocker if desired may be independently detached from the machine; and that if desired the auxiliary bracket 40, together with all'of the parts carried thereb may be detached from the bracket 39 an independently removed from the machine, orboth brackets 39 and 40, together with all of the parts carried thereby, may. be detached from the machine as a single unit. By these means I am enabled to readily assemble and adjust the parts rela-' tively to' each other outside of the machine and introduce them as a unit into the machine or remove the parts as ,a unit or separably, as may be desired. There is no a1- ternation in the relation between the parts the parts carried thereby. At this time the combined feed inion, sleeve and wheel 63 may be remove from the shaft without detaching the esca ement wheel therefrom or altering its relation of the wheel to the shaft. When the escapement wheel shaft is mounted in position one end of the feed pinion is adapted to bear against the inner side of the bearing 55 and prevent a movement of the combined feed pinion, sleeve and wheel 63 in one direction along the shaft, a movement of such parts in the opposite direction being prevented by a forward extension 69 on the hub of the esca ment wheel.

Ordinarily hereto ore the escapementwheel and its shaft, etc., we e mounted on the top plate above the same, and the dog carrier was independently mounted on and beneath the top plate. In such constructions difiiculties were encountered in obtaining an accurate relation between the feed dogs and the escapement wheel. Inequali- I required. Moreover, each time either the dog carrier bracket or the escapement wheel bracket is detached great care must be exercised when the part is returned to obtainthe proper adjustment or correlation between the feed dogs and escapement wheel.

It will be seen that by my present construc-' tion of a feed rack carried, by the carriage,

. said shaft and the parts carried thereby to' an escapement wheel shaft, a feed pinion carried by said shaft and meshing with said rack,- back space and escapement Wheels mounted on said shaft, back space means coacting with said back space wheel, a dog carrier, and means which enable all of said parts except the feed rack and carriage to be introduced into or detached from the machine as a single unit.

2. In a typewriting machine, the combination of a feed rack carried by the carriage, an escapement wheel shaft, a feed pinion carried by said shaft and meshing with said rack, back space-and escapement wheels mounted on said shaft, backspace means co-acting with said back space Wheel, a dog carrier, means which enable all of said parts except the feed rack and carriage to be introduced into or detached from the machine as a single unit, and means which enable be detached independently of the other parts mentioned.

3. In a typewriting machine, the combination of a feed rack carried by the carriage, an escapement wheel shaft, a feed pinion carried by said shaft and meshing with said rack, back space and escapement wheels mounted on said shaft, back space means co-acting with said back space wheel, a dog carrier, means which enable all of said parts except the feed rack and carriage to be introduced into or detached from the machine as a single unit, and means which enable said shaft and the parts carried thereby together with said coacting back space means to be detached as a, single unit independently of the dog carrier.

4. In a typewriting machine, the combination of a feed rack carried by the carriage, an escapement wheel shaft, a feed pinion carried by said shaft and meshing with said rack, back space and escapement wheels mounted on said shaft, back space means co-acting with said back space wheel, a dog carrier, means which enable all of said parts except the feed rack and carriage to be introduced into or detached from the machine as a single unit, means which enable said shaft and the parts carried thereby together with said backspace means-to be detached a single unit independently of the dog carrier, and means which enable a separate and independent detachment of said back space means to be effected.

5. In a typewriting machine, the combination of a feed rack carried by the carriage,

an escapement wheel shaft, a feed pinion carried by said shaft and meshing with said rack, back space and escapement wheels mounted on said shaft, back space means co-acting with said back space wheel, a dog carrier, means which enable all of said parts except the feed rack andcarriage to be introduced into or detached from the machine as a sin le unit, separate-means which enable sai shaft and the parts carried thereby to be detached independently of the other parts mentioned, separate means which enable said shaft and the partslcarried thereby together with said coacting back space means to be detached as a smgle unit lndependently of the dog carrier, and separate means which enable a separate and. independent detachment of the dog rockertO be effected.

6. In a typewriting machine, the combination of a dog carrier bracket detachably secured to the top plate of the machine, back space actuating means in the base of themachine, back space means extending above the top plate of the machine and detachably 1 connected to said actuating means and carried in its entirety by and detachable as a unit with said dog carrier bracket, and means for enabling said back spacing means to be detached as a unit from said dog carrier bracket.

7. In a typewri'ting machine, the combination of a'dog carrier bracket detachably nation of a dog carrier bracket detachably secured to the top plate of the machine, a dog carrier carried by said bracket below the top plate and detachably mounted thereon, an auxiliary bracket extending above the top plate and carried wholly by said dog carrier bracket and detachable therewith and independently thereof, back space actuating means on the frame of the machine,

and back space means extending above the top plate and carried in its entirety by said auxiliary bracket and detachably connected to said actuatingmeans whereby the dog carrier, both brackets and back space means may be introduced into or detached from the machine as a single unit, or the do carrier may be separately removed, or t e back of the dog carrier.

space means may be removed independently 9. In a typewriting machine, the combination of a dog carrier bracket detachably secured to the top late of the machine, a dog carrier carried by said bracket and detachably mounted thereon, an auxiliary bracket carried wholly by said dog carrier bracket and detachable therewith and independently thereof, a feed pinion and connected back space wheel carried by said auxiliary bracket, co-acting back space devices carried by said auxiliary bracket, and back space actuating means on the frame of the machine and detachably connected to said back space means whereby the dog carrier, feed pinion, back space wheel, and back space devices may be introduced into or detached from the machine as a unit, or the back space device, wheel and feed pinion may be detached as a unit independently of the do carrier.

10. n a typewriting machine, the combination of a dog carrier bracket detachably secured to the top plate of the machine, a dog1 carrier carried by said bracket and detac ably mounted thereon, an auxiliary bracket carried wholly by said dog carrier bracket and detachable therewith and independently thereof, an escapement wheel shaft carried by said auxiliary bracket, an escapement wheel carried by said shaft, a back space wheel and feed pinionalso carried by said shaft, back space devices carried by said auxiliary bracket, and back space actuating means carried by the frame of the machine and detachably connected tosaid back space devices.

11. In a typewriting machine, the combination of a dog carrier bracket detachably secured to and arranged below the top plate of the machine, a dog carrier detachably mounted on said bracket, an auxiliary bracket extending above the top plate of the machine and carried wholly by and detachably secured to said dog carrier bracket.

12. In a typewriting machine, the combination of back space means including adjustable means for limiting the return movement of the parts to normal osition, and means which enable said bac space means together with said adjustable limiting means to be attached to. and detached from the machine as a single unit.

13. In a typewriting machine, the combination of a bracket detachable from the machine, and back spaoe means including an adjustable stop for limiting the return.

movement of the arts to normal position, and a noise reducing buffer interposed between said stop and the part which co-acts therewith, said back space means bein carried by and detachable with said brac et as a single unit.

14. In a typewriting machine, the combination of a bracket detachable from the machine, a back spacewheel carried by said bracket, a feed pinion connected to said wheel, a lever carried by said bracket, a back space pawl carried by said lever and cooperative with said wheel, and an adjusttachably securing one of said brackets to.

the top plate of the machine so that the brackets may be introduced into and detached from the machine as a single unit together with the parts carried thereby, or one of said brackets together with the parts carried thereby may be separately detached as a single unit.

16. In a typewriting machine, the combination of two supporting brackets detachably connected together, one extendin above and the other below the top plate 0 the machine, means for detachably securing one of said' brackets to the top plate of the machine so that the brackets may be introduced into and detached from the machine as a single unit together with the parts carried thereby, or one of said brackets together with the parts carried thereby may be separately detached as a single unit, back space actuating means carried by the frame of the machine, and back space means detachably connected to said actuating means and carried in its entirety by one of said brackets. a

17. In a typewriting machine, the combination of two supporting brackets detachably connected together, one extending above and the other below the top plate of the machine, means for detachably securing one of said brackets to the top plate so that the brackets may be introduced into and detached from the machine as a single unit together with the parts carried thereby, or

one of said brackets together with the parts nation of two supporting brackets detachably connected together, one extendin above and the other below the top plate of t e machine, means for detachably securing one of said brackets to the top plate so that the brackets may be introduced into and detached from the machine as a single unit together with the parts carried thereby, or one of said brackets together with the parts carmounted, and back space actuating means carried by the frame of the machine and detachably connected to said back space means.

19. In a typewriting machine, the combinationnof two supporting brackets detachably connected together, one extending above and the other below the top plate of the machine, means for detachably securing one of said brackets to the top plate so that the brackets may be introduced into and detached from themachine as a single unit. to-

gether with the parts carried thereby, or one of said brackets together with the parts carried thereby may be separately detached as a single unit, an escapement wheel shaft detachably mounted on one of said brackets, an escapement wheel and feed pinion carried by said shaft, escapement devices cooperative with the escapement wheel and detachably mounted as a unit on the other of said brackets, a back space wheel on said shaft and connected with said feed pinion, back space means co-acting with said back space wheel and carried in its entirety by the same bracket on which said shaft is mounted, and back space actuating means carried by the frame of the machine and detachably connected to said back space means.

20.- In a typewriting machine, the combination of a top 'plate having an opening therein, two supporting brackets detachably connected together one extending above and the other below the top plate through said opening, operating parts carried by each of said brackets, and means for detachably securing one of said brackets to said top plate so that the brackets may be introduced into and detached from the machine through said opening as a single unit together with the parts carried thereby, or one of said. brackets together with the parts carried thereby may be separately detached as a I single unit.

21. Ina typewriting machine, the combi nation of an escapement wheel shaft with parts'mounted thereon, and means for detachably mounting said shaft in place, said means comprising a bearing member in which one end of the shaft is seated, a split bearing with a smooth bore in which said member is seated and adapted to be adjusted axially of said shaft and a screw by which the split bearing is contracted to clamp and hold the bearing member in its adjusted position in the bore.

22. In a typewriting machine, the combination of an escapement wheel shaft with parts mounted thereon, said shaft having a reduced end which forms a shoulder, and means for detachably mounting said shaft in place, said means comprising a bearing member in which the reduced end of the shaft is seated and against which the shoulder bears to receive an endwise thrust of the shaft, a-split bearing with a bore in which said member is seated and adapted to be adjusted axially of said shaft, and a screw by which the split bearing is contracted to clamp and hold the bearing member in its adjusted position in the bore. c

23. In a typewriting machine, the combination of an esca ement wheel shaft above the top plate of t e machine, a dog carrier below the top plate of the machine, means which enable said escapement wheel shaft together with the parts-carried thereby and the dog carrier to be introduced into or detached from the machine as a single unit, and means which enable the escapement wheel shaft together with the parts carried thereby to be detached from the machine independently of the dog carrier.

24. In a typewriting machine, the combination of a dog carrier bracket, a separateand distinct bracket for the escapement Wheel shaft,this lastmentioned bracket being detachably secured directly to said dog carrier bracket, so that one of said brackets constitutes a support. for the other and the detachment of one bracket independently of the othermay be effected, and means which enable both of said brackets and the parts carried thereby to be introduced into or detached from the machine as a single unit.

Signed at the borough of Manhattan, city of New York, in the county of New York and State of 'New York, this 26th day of May, A. D. 1919.

OSCAR WOO'DWARD. Witnesses:

CHARLES E. SMITH, E. M. Wants.

Images