US1652294A - Keyboard mechanism - Google Patents

Description

Dec. 13, 1927.

V 1,652,294 G. W. BEADLE KEYBOARD MECHANISM Filed Aug. 13, 1926 I l I I l Patented Dec. 13, 1927.

rnonen w. BEADLE, '01 NEW YORK, 1e71,. nssreifocw'romemvrnem LINOTYPE COMPANY, .ecomonxmron on EWYORK;

' mi mnn maximisin- A plication-messing: 13,1926; vserial'yno. exams,

:Thisinvention :ihas reference tofkeyboard mechanisms, such .as are, {employed Vin-com- 'rmercial linotype machines. In these :ma-

ohin'es fihe escapements controlling ;the dis toliwr ge ofithe matrices from 'thea'magazine rare-ordinarily actuated by vertical 1 reeds-mp ier'ated by :pivoted :yokes .or levers, eachconetaining iavrrotary cam or eccentric which is adeptedzto mmket peripheral contact with en underlying zconsta-ntly irritating rnbber cov- 1 iereda-roll. The xpi voted 'yokes are held nor-i melly wifihrtheir cemsat restend out ofcontaot with the -:1:ubber-;eovened 11 0111 and-ere released lhyzthe manipulation of i finger keys, ll whieh ipermit :the'acmns to fall into engagement with theldnivingiroll and be :rotated 1 thereby :to raise ithe'ryokes and; operate @the escapements. iIn ipractiee, .ithe :lif e kof :the

- 'rnbber covenrolls is comparatively short by reason of w'ear and other deterioratinginflu- -ences; and hence it is :necessary ,at times to remove the worn rolls .ztnd c-substitute znew ,onhne 3 3 oi Fig, 11,; and

ones; involving. considerable expense-and oc- --'cas1on1ng anuch unconvenlence :nn'd ;loss .of

w timei ln addition, sthe wear of the rolls,

' oftentimes :results :in the :failure of. the escepements to respond ItQ IbhGJaGtHatiQHOf thG the' :eamyo'kest Furthermore, and Without 0 "regard' to :thezquestion of .wear, -consideralifle slippage-takes place between the cams :and the IllbbGF EO-VBIGdiIOH'Sidllliillg theirrdriving engagement, and especially when oil finds its way' onto the :ro1ls,.:res1i1ting in a delayed actuation of the inlatrixereleasing escapements, and thus giving rise to transpositions -"dfm'zttricesiinrthe composediline. 7 H ke ;present invention is-wintended :to .do away with thei:rlihbencovered. rolls aind their 4o attendant objections, and contemplates a simple, compact arrangement wherein :the "cams or -=eccentrics :are rotated-positively and theii 'enga'gement Land :disenga gement with andirom :the driving-r011 accomplished in a direct and reliable manner. In thegembodiment iHnstraied, itheocamsare zlooselyf mounted on a metalxdrivingiroll and are provided r with key-c0ntr01led:c1ut0h membersiaeting t'o e'oli pl'e the cams :to or .uncouple :them irom po'the driving irol l, Ithe clatter zbeing'iformed -with 0nei0r :more "grooves "to rreeeive' teeth formed 'on's'ther clutch members in;provid-ing changes and variations may be made ethjerein stillbe comprised within its scope. It should ,he understood, therefore',v tha;t the invention 'lisnot lin'lited to.any -specificiformrorembodiment except in so far as such limitationsare specified .in ethe clai-ms.

-Imtheadramings:

Fig.7 1 is a side elevation partly -in.,sec iron and broken away, of the improved tkeyloom-xi mechanism as applied to a flinoftype inaghine and showing .the keyboard partslat res, o

Rig: ;2 is a :similar; view hoard parts incineration};

Figs3gisa verticarhtransverse sectionitaken ,showing the key- Eig. a, detsiil perspcctive view of one tofithecamiunits As shown in -Fig. the,matrix (releasing -esc gpements A are actuatedrby a series ,of \verticallyqdisposed levers A through :the medium yet a; corresponding seriesof :rocking levers A arranged hetyween lthe upper ends of .the levers A =an'dzthe esc pement .plnngers. Hihelower (ends of sa i I levers A are provided with anti-friction rollers A arranged to ridenpon rotatehle camsor eccen- -trics B, egainst Whichw-they are 'yieldingly maintained -by pull strings A connected to the u perJevers A 1 .As the parts ;areithus arranged, thecamsB when rotated .will rock vthe levers ,A- ,A land actuate the associated .escepemcnts A (to .efiect jthe release of the corresponding ima trices X, which vthen pass from .the gmagazi'ne .F 'into the assembler v throat ,Elfor colnposition Iinlinefin ,theinsual The cams B; according to the presentinwention areilooselyrmonnted on :3 constant- .ly v driven metalhero 117B but ere capable of heing connected to and disconnected from said-011 .hy means :ofeurvedclutch paWls 'IB ;pivote,d 4113;]; to rthe sides of theca'rns; lThe cams B ,are provided with laterally extendits mode of ga pplieation which will sponding to the fin 4o tain the cams in uniforml s aced relation on the driving roll 13 an a so to provide sufficient clearance ter the pawls H freely about their ivotal axes 6. These pawls B are each ormed with a tooth B projecting inwardly therefrom and arranged to enga e with one or the other of a pair of diametrically opposite rooves B formed in the roll B and exten ing throughout the len 11 thereof. Plate springs B, anchored to t e cams B and pressing a ainst one end of the attached pawls B tend constantly to draw the teeth B into en agement with the grooves B, it being note that the hubs B are notched or cut away to permit passage of the teeth therethrough. At their opp0 site ends, however, the awls B bank upon pivoted trip do s C whic hold them normal disengaged irom the driving roll against t e tension of the spring B. These trip dogs as usual, are controlled by finger keys C t rough a series of vertical connecting bars C slidably mounted in the keyboard frame.

The operation of the parts is as follows: \Vhen a finger key C is depressed, the connected bar C is ifted and the corresponding trip dog C rocked forwardly from under the clutch pawl B (seeFig. 2). The spring B acts instantly to draw the pawl tooth B into driving en agement with one of the roll grooves B. T e a propriate cam B is thus caused to rotate wit 1 the driving roll B and, as it continues to rotate, the associated lever A is rocked rearwardly to the position shown b the broken lines in Fig. 2 and, through t e lever A caused to actuate the escapement A for the release of a matrix correer ke actuated. In the meantime, due to t key, the free end of the trip dog C will have returned to its normal position, so that when the cam has about completed its rotation, the

.clutch awl B will enga e the do C and its tooth 4 be lifted out o groove B, thereby breaking the drivinw connection between the rotating roll B and the cam B and allowing the latterto come to rest to await the next actuation of the finger key (Fig. 1).

Many advantages characterize the improved construction. In addition to those previously mentioned, it may be noted that the mechanism is compact, self-contained, easily assembled, and inexpensive to manufacture. Moreover, a single bank or row of the cam units will suffice for all the finger keys.

vention.

As before stated, the foregoing improvements have been shown merely in preferred form and by way of example, and obviously many changes and variations may be made without de arting from the spirit of the in- %or example, the number of grooves in the roll B might be materially increased and even to the extent of making the to turn e re ease of the finger required.

used b mounting them above an in contact p with t 1e cams B. These and various other changes will readily suggest themselves "to those skilled in the art.

Having thus described my invention, its a construction and mode of operation, clainrand desire to secure b Letters Patent of the United States, is as ollows:

1. In a mechanism of the class described, the combination of a rotary driving element,

what I a rotary driven element mounted loosely thereon and rotatable concentrically thereof but capable of connection therewith, an; actuatinginember associated with the driven element, and means for controllingthe connection and disconnection of said element with and from the drivin element.

In a mechanism of t a class describedr:

the combination of a rotary drivingelelnent, a rotary driven element normally disconnected therefrom and rotatable eoncentri- 9 eally thereof, a clutch for establishing a driving connection between said elements, am? actuating member associated with the driven element, and means for enga ing and disenga ing the clutch as requiretfi v n a mechanism of the class described, the combination of a rotary grooved driving element, a rotary driven e ement, a ivote clutch pawl carried by the driven e ement, an actuating member associated with the driven element, and controlling means whereby the clutch pawl may be engaged: with and disengaged from the grooved driving element as required. a v

4. In a mechanism of the class described, the combination of a rotar driving element, a cam loosely mounted t ereon and rotat able concentrically thereof, a clutch for connecting the cam to or disconnecting it from the driving element, an actuating member associated with the cam, and means for engagin r and disengaging the clutch. as require i i v 5. In a mechanism of the class described, the combination of a rota driving elemen a cam loosely mounted thereon, a. pivote clutch pawl carried bythe cam and engage able with said driving element, an actuating member controlled by the cam, and means for making and breaking the enga ement 0f the clutch pawl with the driving edement as 6. In a ke board mechanisnrof the class described, t e. combination of a owe!- driven roll, a cam loosely mounted t ereon and rotatable concentrically thereof, a keyactuated trip dog, and a clutch controlled by said dog for making and breaking the connection between the roll. and cam.

7. In a keyboard mechanism of the class described, the combination of a power-driven roll, a cam loosely mounted thereon, a keyactuated trip dog, and a pivoted clutch pawl carried by the cam and controlled by said dog for making and breaking the driving connection between the roll and cam.

8. In a keyboard mechanism of the class described, the combination of a power-driven roll, a series of cams loosely mounted thereon and rotatable concentrically thereof but capable of connection therewith, a corresponding series of actuating members associated with the respective cams, and means for controlling the connection and disconnection of the cams individually with and from the roll.

9. In a keyboard mechanism of the class described, the combination of a power-driven roll, a series of cams loosely mounted there- 0 on, a corresponding series of actuating members associated with'the cams, pivoted clutch pawls carried by the respective cams for establishing a driving connection between the cams and roll, and controlling means whereby the clutch pawls may be individually engaged with and disen aged from the power-driven 'roll as required.

10. In a keyboard mechanism of the class described, the combination of a grooved I quired.

Intestimony' whereof, I have affixed my signature hereto. V

GEORGE w. 'BEADLE.

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