US991166A - Type-writing machine. - Google Patents

Description

H. A. MOYER s 0. C. KVLE.

vTYPE WRITING MACHINE.

APPLIOATEON HLEDAPR. 14, 190e. d

Patented May 2, 191%l 2 SHEET-SHEET l.

H1 AQMOYER & 0.C. KAVLB.'

vTYPE WRITINGl MACHINE. APPLICATION FILED APR.14, 1906.

Paented May 2, 1911.

' fave/120m 2 SHEBTS-SHBETZ.

HARVEY A. NOYER AND OSCAR C. KAVLE, OF SYlRACUSE, NEW YORK,

ASSIGNORS OF ONE-HAL T SAID MOYER AND ONE-HALF T0 EMMIT G. LATTA, OF SYRACUSE,

NEW YORK.

TYPE-:Wartime MACHINL.

To all whom 'it V'mq/y concern.

Beit known thatl we, 'Haro/'EY A. Moi-en 'and OSCAR C. Kayne, citizens of the United bar actuating levers of ty pewriting machines! One of the objects of the invention is to produce atype bar bearing of thin, compact y forni which will reduce the lateral movement of the type bars tothe minimum and thereby insure a more perfect spacing ofthe impressions, and which ,will work with little -friction and will be durable and adapted for long service without. adjustment for wear, and which can be made with great exactness at the minimum-expense and labor., y

Another object of the inventiomis to provide springs for returning the type bars and their actuating levers to the normal position which will work with the least possible friction and are so constructed and'arranged that they can be separately adjusted to equal-v ize the touchcf thel several key legers, and ..30 so that the tension of tla'q whole series ,of springs can loev simultaneously aditisted to 4change the touch te suit, different-operators. (In. the accompanying drawings, consisting of two sheets: Figure l is a fragmentary embodying the invention. 'Fig EZ is ay fragmentary bottom plan view, partly' broken away. 'showing the key levers an their returning springs; Fig. 3 is an enlarged fragmentary sectional elevation of the spring adjusting ineens. Fig. 4 isa'plan viewof one end of -the spring adjusting bar. Figni is a sectional View ofthe typebar segment, and elevation of onef of the type bars and its hanger. Fig. 6 lsn fragmentary view of the same parts. shew/ving the hanger. in section. Fig.

on an enlarged scale.- Fig. 9 is`a detail sec- .50 tion, on anvenlarged scale, ofthe pivot screw and spacing sleeve. Fig. '10 isl an elevation of a type har' and hanger ofnioditietl-form.

Fig. ll is a fragnientar,1 lsectional elevation thereof. Fig. l2 is a transverse 4sectional elevation thereof in linel-fl'Z, Fig. 10.

Specification of Letters Patent.

sectional elevation of a typewriting machine:

is across sect-ion thereof in line Tf?, Fig. 5. FgI'S is a similar view,l .any other Suitablemamier.

Patented May 2, 1911.

i Appicauonfaiea apen 14,1906. serial No. 311,708.

v Like letters of reference refer to like parts in the several figures.

Referring to Fig. l, A represents the frame of a typewriting machine, B one of the type bars which are pivoted on a segment or support C,' and D one of the key levers for actuating the type bars. A front strike typewriter is illustrated in the draw\ ings of the character disclosed in the Patent, No. 819,365, granted May 1, 1906, to H. A.' 6,5 Moyer and E. Gr. Latta,and the type bar segment is arranged in upright position below the platen, and the actuating key levers are pivoted at' their reerends, extending forwardly beneath the segment, and their inovement is transmitted to the type bars by auxiliary levers, one *of which is ,shown at E, pivoted at their lower ends, connected to the type bars at their upper ends and having pin fioA Avand slot lconnections f between their ends with the key levers. It should be understood, however, that the -vimprovements are not limited tot-his type'of machines 'but are applicable to many other forms of typewriting machines, In the construction of the type bar bearing shown in Figs. 5A), which is now deemed preferable, each type bar B is pivoted to a `hanger consisting of a Hat-sided sheet metal body G and two fli'itsheet metal side plates 85 .g riveted on the opposite sides of the body,

and between which the offset segmental circular and fiat-sided inner end or bearing portion of the type bar is pivoted. The type bar isvalso made of sheet metal and has the Kusual type head at its outer end. The type har and side plates of the hanger are niachined and then hardened, after which they, and also the hanger; are ground, for instance, on a magnetic chuck, to insure absolutely flat, smooth and`parallel surfaces, and to -make the type har very slightly thinner than the hanger body, so that it. will swing freely .between the side plates of the hanger without appreciable lateral play. The hangers 4can be securedin radial slots in the segment by a retaining plate g" und screws g2, or in ln these'respects the construction of the bearing is like that ,describedin said lpatent. n y

Instead of pivoting ,the type bar to the hanger by a shouldered rivet, such as shown in said patent, a combined pivot-screw and rivet H, Fig. 9, is' employed having a plain cylindrical shank, a head, preferably conical, 110

adapted to seat in a countersink in one of the hanger side plates, and a threaded end for screwing into a threaded hole in the other side plate. The threaded end of the screw is preferably made concaved, or with a conical hollow, so that after the screw is driven into place in the hanger it can be expanded slightly with a. punch to prevent it from working loose. A cylindrical spacing sleeve I surrounds the shank of the screw and tit-s in the pivot opening a' of the type bar. rlhe spacing sleeve is originally made slightly longer than the thickness of the' hanger body, and after hardening, its ends are ground until they are parallel and the sleeve is exactly as long as the thickness of the hanger body. A convenient way to insure the exact length of the spacing sleeve is to punch a hole 7:, Figs. 5 and 6, in the lower end of the hanger body to fit the spac-A ingsleeve and place one of the sleeves'in the hole and leave it there duringthe grinding of the hanger body, so that both parts are ground in -one operation to absolutely the same thickness. Each spacing sleeve is used with the hanger with which it is ground to preclude the possibility of using a spacing sleeve differing in length from the thickness of the hanger body, and this is accomplished by temporarily securing the sleeve l in the hole/t1 of the hanger body by any suitable means until ready for use.

After the side plates are riveted to the body of the hanger the sleeve is inserted in the pivot opening of .the type bar and both are then placed between the hanger side plates and secured'by the pivot screw. The type bar is ground very slightly thinner tha t-he body of the hanger, one liveth0usandtl.A part of an inch thinner as nearly as possible, so that when the pivot screw is driven in the spacingsleeve will be pinched and held stationary between the side plates and will hold the side plates from actual contact withbut very close to the type bar and parallel with each other. When. the parts are found to be perfectly matched, so that the type bar will swing freely in the hanger with the least lateral play, the concaved end of the screw is expanded slightly in the threaded hole ofthe hanger to prevent the screw from working loose, but should the type bar be found to be either toothin or too thick for perfect movement the screw can be withdawn and the type bar replaced by one of the exact thickness required before the screw is expanded. Should the screw be accidentally expanded too much, or so as to cause friction between the type bar and hanger, itcan be forced back enough to relieve the friction.

The screw andv sleeve made and applied as described is a marked improvement over a shouldered rivet for it is diflicult to make and harden such small rivets of the `exact length between the shoulders required to insure perfect freedom of movement of the type bar without lateral play in the hanger, and furthermore, great care must be exercised in riveting such a s houldered rivet. even when of the exact dimensions, to prevent the side plates from pinching the type bar and causing more or less friction. As the perfectness of fit of the type bar cannot be discovered in this construction until after the pivot is riveted in place, it is necessary to remove the rivets connecting the side plates to the body of the hanger in order to replace a defective pivot and much material, time and labor is wasted in producing perfect bearings.

The construction of the bearing herein described permits all of the wearing parts to be hardened, and all meeting surfaces, including the ends of the spacing sleeves', to be ground true after hardening. The bearing occupies the least possible space and has less friction and is capable of longer service without adjustment than any bearing known to us of such compact form.

The several parts of the bearing can be constructed more exactly than in known constructions and assembled without the loss of any of the parts and with less labor than usual. Owing to the removability of the pivot screws t-he necessity for freeing the riveted pivots by grinding with emery and oil after riveting up the parts, as is done in other constructions, is avoided, and this conduces to greater durability for the reason that no emery is left in the pivot joint to cause excessive wear after the machines are placed in service.

lnstead of the combined screw and rivet pivot an ordinary rivet could be used, or an ordinary screwcould be used without being expanded in place, but in using an ordinary rivet it would be impossible to tell when the type bar makes a perfect fit in the hanger until after rivet-ing, and an ordinary screw would be apt to work loose. Screws similar to that shown but not having the hollow end could be used, but such screws would be harder to rivet down and more liable to distort the side plates when beingriveted.

The type bar is nearer free from lateral vibration than in any other bearing known to us having so litt-le friction, except possibly the more expensive, cumbersome and fragile ball bearings, and yet as the type bar does not. actually contact with the side plates of the hanger t-he type head is usually capable of an extremely slight lateral movement and to reduce this to the minimum the side plates of the hanger are provided with guide extensions L, Figs. 5 and 6, above and in front of the oflset bearing and of the type bar, 'which form lateral supports for the type bar at the time it approaches the printing point.

The bar only comes in contact with the guide g3 are riveted to the body B and pivoted to the flat-sided hanger G' 40- the type bar is .50 ing front and rear flanges,

slot-s.

- and engage in a.

5 without eXtra cost, and they in effect increase the bearing of the side plates on the bar to more than three times the diameter of the offset bearing end of the type bar. The guide extensions tit the bar the same as the sa-.bearing portions of the plates but as they are so far removed from the pivot they reducethe lateral movement of the bar when at the printing point so much as to make it unimportant. rl-he guide extensions are prefl. 1 5 erable to a guide at the printingpoint because they are noiseless on account of being nearer to the pivot and absolutely alined with the bearing portions of the side plates, and they will not cause the type head to 20 tremble at the instant it reaches the printing point.

The modifiedconstruction of the type bar and hanger, shown in Figs. 10-12, is arev versa-l of that described and the side plates of the type bar by a. screw H and spacing sleeve'I similar to those .used in the rst construction. The hanger in this case is made slightly thinner 30 than the body` of the type bar kand has an upwardly and forwardly projecting guide extension L which is a apted to enter loetween the side plates vof the type bar when the latter. is-'at the printing point, to pre- 35 vent lateral movement thereof. This c0nstruction has many of the Yadvantag'ges of the one first described; but the first one is considered better because the hanger body overhangs and protects the pivot from dust and of less weight.

'The springsfoi` returning the key levers and connected parts to their normal position after actuation are'` preferably constructed and arranged as follows, see Figs.

'45 1-4: M represents a horizontal bracket or bar rigidly secured in any suitable manner to the rear portion of the frame A and eX- tending from side to side thereof. The bracket is preferably formed with dependthe front flangev beingA provided with vertical slots m in which the rear ends of the key levers are pivoted on a wire or rod m passing lengthwise through the bracket and crossing the N represents the returning springs. vThey are all alike, consisting-of strips of spring metal and arranged one longitudinally beneath each key lever. The rear ends of the springs are preferably bentupwardly slot n extending lengthwise in the under side of the rear flange of the bracket M, and from their upturned rear 4ends the springs extend 'horizontally for ward, then downwardly under the pivoted 6-5 ends of the key levers and then forwardly and upwardly to vbear at their front ends against the under sides of the key levers. The horizontal rear portions of the springs have parallel side edges and abut against each other to prevent lateral movement. The springs taper forwardly from their wide abutting horizontal portions and are provided at their front ends with upturned ears n which embrace the key levers to pre- `vent the disengagement of the springs therefrom. By shaping and securing the rear endsof the springs as described they bear against and mutually hold each other from lateral displacement andare not weakened.v

by holes for screws or other securing de.- vices. The springs could, however, be attached to the bracket in any other suitable way. O represents an adjusting bar for the springs N. The adjusting bar is preferably of angular cross section and is located beneath the horizontal parts of the springs and is secured so as to be adjustable vertically. A series of adjusting screws P work in threaded holes in the horizontal flange ofl the adjusting bar and bear at their upper ends against the under side of the several springs N. By properly adjusting these screws the tension of the springs can be individually regulated as desired. In the construct-ion shown, see Figs. 3 and 4, the ends of the vertical flange of the adjusting bar project beyond the ends of its horizontal flange and enter vertical slots p in depending end portions p of the bracket M, which slots form guides that hold the bar vertical and'allow it to be adjusted vertically. The horizontal flange of the adjusting bar is slotted near it-s ends at p2 to engage the grooved heads of screws p3 which are screwed into threaded holes in the bracket M and serve to support and move the bar up and down. Thus by adjusting the screws P the tension of the springs can be individually regulated to exactly equalize the touch of the several key levers, while by raising or lowering the adjusting bar by the screws p3 the tension of the whole series of springs'` can be changed to suit differentoperators. The indivldual adjusting screws'P preferably have hexagonal heads. as shown in Fig.

:2. and after they are adjusted a thin strip or bar rj is placed between the lheads of thel j screws and the vertical flange of the adjusting bar, as shown in Figs. 1 and Q. to lock thescrews from movement. The lock strip is held 1n place by any suitable means.

It will be seen from Figf 1 that the re- I turning springs for the key levers contact with the levers and adjusting Screws P substantially in straight4 lines passing through the pivots of the key levers, andi-his arrangement of the springs reduces the sliding friction between the springs and key Alevers to the least amount possible with aflat or leafspring in actual contact -with the lever, and

permits' the use of a flat'spring with its great range of adjustment with no more friction than would be caused by a helical spring with its limited adjustment. It will be understood that in separately adjusting the tension of the springs by the screws P, all of the screw points may not be exactly in straight lines passing through the pivots ofthe key levers and points of Contact of the springs with the key levers, but the arrangement is such as to bring the points of the adjusting screws as nearly as possible in such straight lines.

The key levers are detachably pivoted in the machine in such manner that they can be removed without disturbing their springs M. This is accomplished in the machine illustrated by making the pivot wire m for the levers with a fiat side and providing'the key levers with circular pivot openings of the diameterlof the full round wire intersected by slots r in the upper parts of the levers which are just wide enough to permit the passage of the pivot wire when turned with its at side parallel to the sides of the slots r. The pivot wire is provided at one end with a lever r', Fig. l, by which it can be turned. When the lever is in the position shown-by full lines the key levers cannot be detached, but by turning the lever to the position indicated by broken lines the key levers canbe depressed and drawn forward out of their seats without disturbing their springs N other than by slightly flexing them as the key levers are pushed downwardly to clear the pivot wire. The auxiliary levers E are preferably detachably pivoted in a similar manner.

l/Ve claim as our invention:

l. A type bar and hanger composed of ytwo fiat body parts of slightly different thickness, and a pair of flat side plates independent of said body parts arranged at opposite sides of said parts and rigidly securedto the'hanger body, the type-bar having an offset bearing end pivoted between the side plates below an overhanging portion of the hanger body and adapted to swing between said side plates, substantially as set forth.

2. A type bar having a Hat-sided part at its pivot end, a hangerhaving a at-sided body part, a pair of fiat side plates independent of and arranged at opposite' sides of said type-bar and hanger body and rigidly secured to one' of said fiat-sided parts and pivotally connected to said other part, one of said flat-sided parts having a portion overhanging the pivotal connection to exclude' dust therefrom, substantially as set forth.

3. A type bar-having a fiat-sided offset pivot end, a hanger having a flat-sided body with an offset portion overhanging the off- .strips between their ends,

set pivot end of the type bar, a pair of flat side plates independent of said type bar and hanger body and rigidly secured to the hanger body and pivotally connected to the oifset end of the bar, the side plates being extended from the hanger body to form an open guide having parallel sides to receive the body portion of the bar when it ap proaches the printing point, substantially as set forth.

t. In a typewritingmachine, the combination-of a series of type bar actuating levers pivoted at one end, strips supported at points beyond the pivot ends of said levers and engaging the levers between the ends thereof, the contact points of the springs with the levers and with the spring supports 'being substantially in line with the lever pivots, substantially as set forth.

5. In a typewriting machine, the combinationof a frame, a series of key levers pivoted to the frame at their rear ends,l a' series of spring strips supported in rear of the pivoted ends of the key levers and connected to the levers in front of their 4pivoted ends, the -contact points of the-spring strips with the levers and spring-supports being substantially in line with the lever pivots, substantially as set forth.

6. Ina typewriting machine, the combiand a series of spring nation of a series of key levers pivoted at their ends, a series of spring strips rigidly secured beyond the pivoted ends of the levers and operatively connected to the levers between the ends thereof, and a series of adjusting screws bearing against the spring strips between their ends, substantially as set forth.

7. In a typewriting machine, the combination of a series of key levers pivoted at their ends, a series of spring stripsirigidly secured beyond the pivoted ends of the levers and operatively connected to the levers between the ends thereof, and a series of adjusting screws bearing against the spring substantially as set forth.

8. In a typewrit-ing machine,`the combination of a frame, a series of key levers pivoted to the frame, a series of springs having one end of each seated in a groovey in a fixed part of the frame, and a series of screws acting to hold the springs in their seats and for tensioning the springs, substantially as set forth.

Q .In a typewriting machine, the combination of a frame, a series of key levers pivoted to the frame at their rear ends, a series of springs having ytheir rear ends seated in a groove in' a fixed part of the frame, and a series of screws acting to hold the springs in their seats and for tensionmg the springs, substantially as set forth.

9eme-e 10.111 a typewriting machine, the combi springs vinto operative Contact with the 10 nation of a frame, a Series of kejyr levers ievers, Substantially as Setforth. pivoted to the frame, a fixed part of the fitness ou1'1iands,this 28th day of March,

frame having a groove extending parallel 1996, 5 with the key lever pivots, a series of springs HARVEY A. B'IOYER. having one 'end arranged at an angle to the OSCAR C. KAVLE. body of the springs seated in said groove, Witnesses and means actin@ t0 Secure the Springs in FRANK E. Rem, the groove and orce the free ends of the CHESTER U. REID,

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