US1583553A - Typewriting machine - Google Patents

Description

May 4 1926. 1,583,553

J. B. HOLDEN TYPEWRITING MACHINE Filed August 30, 1924 2 Sheets- Sheet 1 WITNESSES INVENTDR.

v MM

HIS ATTORNEY May 4 1926.

' J. B. HOLDEN TYPEWRITING mamas Filed August 30. 1924 2 Sheets-Sheet 2 INVENTUH WITNESSES /3. MM [97 HIS ATTUFQNEY Patented May 4,192.63 UNITED STATE 5: P TEN 0F JOSEPH B. HOLDEN, or sYnAciisE, NEW YORK, ASSIVGNORYTOHYREMINQ'ICON "Tyre WRITER COMPANY, or ILION, rrnw YORK, A coaronarron on NEW YonK.

'rvrnwarrme maciirnn- A lication filed Au u taaieaa serial No. 735,050. 1

To all whom it may concern:

Be it known that I, JosErH B. HoLDnN, citizen of the United States, and resident of Syracuse, in the. county of Onondaga and State of New'York, have invented certain new and useful Improvements in Typewrit-' ing Machines, of which the-following is a specification.

" My invention relates to typewriting machines and it has for'its vob ect to provide improved governor mechanism for control ling the speed of a long run of the carriage of a typewriter. r v

To the above ends my invention consists in certain features of constructionand com- "binations and arrangements of parts allof which will be fully set forth herein and par ticularly pointed out i'n'the claims. g a

. In the accompanying drawings in which one embodiment of my invention s llustrated, j Figure 1 is a frontto rear vertical sectional'view of a typewriting machine havlng my invention embodied therein;

Figure 2 is a fragmentary front elevatlon partly in section and showing my improvements;

Figure 3 is a fragmentary rear elevation with parts in vertical section; and I Figure 4 is a fragmentary 'top plan-view of a portion of the mechanism.

My invention is applicable or adaptable generally to such machines as typewriting machines and for the purpose of illustration I have shown it applied to a Monarch typewriter, the main frame of which includes a base 1, corner posts 2 and a top plate 3 from -which'last rise standards 4 which support upper and lower rails 5 which through anti-friction balls 6 support the carriage 7 having'the platen 8 mounted therein. The printing-key levers110,'their fulcrum plate 11 and returning springs 12 are all of the ordinary Monarch construction as are'the bell cranks 13 pivoted to said key levers at 14 and each engaging a fulcrum rod 15. Said bell cranks are connected by links 16 with frontstrike type bars 17 pivoted to the usual hanger 18. The key levers operate a univer- -sal bar 20 which by link 21 is connected with dog rocker 22, the feed dogs of which co-operate with an escapement'wheel 23 mounted in 7 the usual manner on one end of a shaft ,24 which at 'carriesthe usual feed pinion 25- co-opits other end ICE PW crating withjthe'feed rack 26. Said rack is,

mounted on the carriage by means of arms 27' pivoted at 28, the construction being such that the rack normally engages the feed ping, ion but can be lifted out of engagement in order to allow the carriage to-move free of the escapement. The carriage is normally drawn toward the left by the-usual spring drum 30. r I j 'All of the mechanism'abovezbriefly described is that'of the ordinary Monarch'ma- Chiller The'machine may be provided with any ordinary means for givinga long run to the carriage, that illustrated consistingpof "the denominational tabulator mechanism which is fully shown and" described in the'patent to Herbert H; Steele, No.'1,064,392 dated June 10, 1913. This Steele tabulator comprises a series of "denominational keys 31,

the levers ofwhich are mounted'on rock shafts 32 each of which rock shafts has a de- 7 r pending arm33 adapted'to operate one of a series of push bars 34" which at their rear ends are suitably guided in a frame '35 secured-to theubase land 'top plate?) of the main frame. Each of said push "rods acts on one of a series of levers 36all pivoted to the frame'35 at 37 {and guided at their upper ends'in a comb '38, the upper part ofeach of these levers constitutinga denominational ,tabulator stop. Said denominational stops are adaptedto be projected by the keys 31 into the path ofone or more'column' stops 40, all mounted on a stop bar'41 whichlatte'r' is mounted on the carriage 7. The levers 36 V are provided with returning springs 42.- A universal bar 43 is adapted to be actuated by any one of the levers 36, said universal bar being supported at its 7 ends by two arms 45 pivoted at 44, one'of said arms be ing extended horizontally and having pivoted thereto a pushlink 46, which is moved upward ateve'ry operation of a tabulator key. This link 46 operates a lever 47 pivoted at 48 to a lug or bracket of the top plate 3. This tabulator mechanism as thus far described is identical with that" describedin the Steele patent. In the present instance, the lever 47 has pivoted to its free end a lifter 50 made of sheet metaland bi-,

furcated to straddle the escapementshaft 24. This lifter'is guided right'andleft by said shaft and front and back: by certain grooves" not shown. In the patenta device similarto 1 the tabulator is operated; .ernor is of such a nature that the most of the lifter has lugs thereon which lie under and are adapted to elevate the feed rack 26 and thus release the carriage from the control of its escapement. In the present instance this lifter elevates the feed rackto release the carriage but not directly. Each prong of the lifter 50 has'an ear'51 and also an ear 52, the ears 52 being bent off toward the back of the machine and thence upward in such fashion that they and the ears 51 together form a sort of guide slot in which lies a lever 53 pivoted at 54: to the lower stationary rail 5. This lever 53 according to the present invention not only raises the feed rack 26 but also connects up my governor mechanism as will hereinafter appear. p

The governor consists of a two-cylindcr air-pump or dash-pot normally disconnected from the carriage but adapted to be geared to it whenever the carriage is required to make a free run, which, in the present embodiment of the invention means whenever The said govthe stationary part of it can readily be made as a single casting and. it is so shown in the present instance. This casting includes a lug or base 55 secured by two screws 56 to the top plate-30f the typewriter. Said casting also includes a cylindrical part 5"? prolongedhorizontally forward into a barrel 58 which latter serves as a bearing for the shaft of the governor. The parts 5'? and 58 have their common axis horizontal in the present instance because in this particular instance that is the most convenient way to makethe governor co-operate with the'feed. rack 26. The part 57 is preferably disposed beyond the rear edge of the top plate 3 and it has projecting radially therefrom two pump cylinders or dash-pots preferably having their axes perpendicular to each other and tothe axis of the part '57. Y

In the parts 57 and 58 of the casting there is a horizontal shaft 59 which at its forward end carries a gear or pinion 61 and at its rear end inside-the cylinder 57 it has a crank 62 rigidly mounted thereon by means of a screw 63. Pivoted on the shaft 59 between the gear 61 and the end of bearing 58 is a sheet metal arm 64 having two headed studs on one of which is journaled a pinion 65 meshing with the gear 61 and on the other and outermost one of which is journaled a double pinion 66, 67,

ofwhich the former meshes with the pin- 'ion 65 while the latter normally lies, below and is adapted to be elevated into engage- ,ment. with the feed rack 26.,

These two pinions are separated by a washer 68, the whole structure 66-, 67, 68 being fastened together byj-small rivets 7 0, Fig. .2. This compound structure of this pinion or gear is not essential being provided in the pres ent instance merely because the feed rack 26 of the Monarch machine is made with inclined teeth and it is desired to make the pinion 67 with corresponding teeth and the gearing 61, 65, 66 with ordinary spur teeth.

The governor is brought into action by the tabulator mechanism by means of a pin 71 projecting from an ear of the arm 64: into a'slot 72 in the free end of the lever 53. The whole construction is such that 'whenever one of the tabulator keys 31 is operated and said lever 53 is moved upward, the arm 6a is also swung upward about the shaft 59 as a center, bringing the pinion 67 into mesh with the feed rack 26 and lifting said feed rack out of mesh with the feed pinion 25, thus freeing the carriage for a long run under the power of the spring drum 80.

It will be perceived that the entire framework of the governor is stationary and that the only parts necessary to be moved in order to couple the governor up to the carriage are the arm 64 and the two pinions carried by it.

The cylindrical part 57 of the governor casting is open at the rear so that the drilling of the hole for the shaft 59 and the in place by two screws 76, the casting being made with lugs or bosses 77 for said screws.

Each cylinder has mounted in it a piston 80 connected with the crank62 by means of a pitman 81. These pitmans are sheet metal parts pivoted one behind the other on a wrist consisting of a shouldered and headed screw 82 screwed into the crank 62, which latter is itself merely a sheet metal plate suitably fastened to the shaft 59, Each of the pistons 80consists simply of a cylinder of metal having a slot sawed almost diametrically across one end of it. Said slot is wide enough to accommodate the end of the pitman 81. Each of these slots is so sawed that one edge of. it is about on a diameter of the piston, so that the body of the slot is offset to one side of said diameter and the crank 62 is so located that the rear surface of the forward pitman 81 and the forward surface of the rear pitman 81 are substantially in the axes of the two cylinders. I

7 It will be perceived that-this makes the pistons interchangeable. If the piston were taken out of one cylinder and pu-tinto the other it would be given a half turn about its own axis in order to bring the slotintothe proper place. Each piston is drilled through and a pivot pin 8% is dropped into the hole and passes through a suitable hole in the end of the pitman 81. When the parts are assembled this pin is retained in place by the walls ofthe cylinder.

Any suitable vents may be provided for the cylinder but I prefer those shown in the drawings. Each of the plates has a threaded hole at the center of it into which is screwed a screw having a V-shaped notch 86 cut longitudinally thereof partway and growing deeper and wider toward one end of the screw. This screw can be adjusted in and out by turning and the further out it is adjusted in the present instance the larger will be the opening provided by the groove 86, said groove in the present instance being made in the inner end of the screw. The screw is secured in its adjusted position by means of a lock nut 87. In order to prevent this look nut from interfering with the passage of the air through the vent,

said nut is itself madewith several crosscuts 88, Fig. 1, in the face thereof contiguous to the plate 75, three such cross-cuts being shown in the present six-sided nut. All of these cross-cuts intersecting in the middle leave a free passage for the air from the vent. Holes 90 are drilled into the outer ends of the pistons 80 so as to 'let said pistons come substantially to the ends of their cylinders without striking the screws It is believed that the operation of this governor will be obvious from what has been said. \Vheneverthe carriage is caused to make a long run by operating a tabulator key the governor is geared'np to said carriage and its shaft -is set into more or less rapid rotation depending upon the speed of the carriage. This rotation results in the reciprocation of the two pistons 80 which reciprocation is made against air resistance and as is well understoodsuch resistance increases quite rapidly beyond a certain speed. The air resistanceand therefore the velocity of the carriage can be nicely regulated by means of the screws 85. The use of two cylinders instead of one gives a more even resistance as will be readily understood because the two pistons do not move in unison, being at an angle to one another. It will of course be understood that the means for connecting the governor shaft with and disconnecting it from the carriage rack can be varied and in fact various changes may be made in the details of construction and arrangement without departing from my invention.

What I claim as new and desire to secure by- Letters Patent, is p 1. In a .typewriting machine, the combination with the carriage of said machine, and means to give a long run to said carriage ofa governor comprising a casting having two air cylinders integral therewith and at an angle to each other, a shaft journaled in said casting and terminating short of the axes of said air cylinders and having on its enda crank and wrist pin, pistons in said cylinders, both connected with said wrist pin, a normally broken train of gearing between said shaft and said carriage, and devices to set said means into operation and simultaneously to connect up said train ofgearing without moving said casting.

2. In a typewriting machine, the combination with the carriageof said machine, and

means to give a long run to said carriage, of a governor comprising a casting rigi ly secured to the stationary framework of the machine and having three cylindrical parts, two of said cylindrical parts being at an angle to each other and having pistons therein, a shaft. on the third cylindrical part terminating short of the axes of said pistons and having on its endea crank with a wrist pin connected to both of said pistons,

.a normally broken train of gearing between said shaft and said carriage, and devices to set said means into operation and simultaneouslyto connect up said train of gearing. 3. tion with the carnage of said mach ne, andmeans to give a long run tofsaidi carriage,

of a governor comprising a stationary cast- In a typewriting machine, the combinai ing rigidly mounted on the framework of I the machine, said casting having three openended cylindrical parts, two; of said cylin- N drical parts being air cylinders arranged at an angle to each other andhaving pistons therein, and the third such part having therein a shaft which terminates short of the axis of said pistons and which has on its end a crank the wrist of which is connected to both of said pistons, cover plates on said open cylindrical parts, and adjustable vents in the cover plates of the air cylinders; a normally broken train of gearin between said shaft and said carriage, sai gearing comprising a carriage feed rack, a gear wheel to mesh with said rack, a gear wheel on said shaft, and an intermediate gear wheel, and devicesforbringing said means into action and simultaneously connecting up said train of gearing,

Signed at Syracuse, in the county of Onond-a o and State of NewYork this 25th. day of ugust, A. D. 1924.

JOSEPH B. HOLDEN.

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