US987153A

US987153A - Escapement mechanism.

Info

Publication number: US987153A
Application number: US59588010A
Authority: US
Inventors: Owen Mccann
Original assignee: Individual
Current assignee: Individual
Priority date: 1910-12-06
Filing date: 1910-12-06
Publication date: 1911-03-21
Anticipated expiration: 1928-03-21

Description

0. MOGANN.

ESCAPEMENT MBGHANISM. APPLIQATIOH HLM) 3110.6, 1910.

$879153., .Patented Mgr; wm.

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OWEN MGCANN, OF LOUISVILLE, KENTUCKY.

i' SCAIPEMENT MECHANISM.

To aZ//fuilwm' 'may concern:

Be 1t known that l, OWEN M CCANN, a

citizen of the United States, 'residing atl Louisville, in the county of Jeffersonand State of Kentucky, have invented certain new and useful Improvements in Escapement Mechanism, ofvvhich the following is a` specification.

This invention relates to typewriters and other machines having a carriage which is fed forward in a step-by-stepmanner by .-umeans of a spring or other'suitable motive power, an escapement controlling suchmovement of' the carriage.

rl`he invention relates more particularly to the eseapement, its object being to provide an improved mechanism of this kind whereby a variable feed of the carriage is obtained. l

The invention consists .in a novel construction and arrangement of parts to be hereinafter described and claimed, and in order that itmay be better iinderstood, ref-` erence-is had to the accompanying drawings' forming a part of this specification.

The preferred embodiment of the invention has been shown and described, but it will be understood that various minor changes in the structural details may. be resorted to without a'dcparture from the invention. lt is also tov be understood that the, invention is not limited to typewriters, butt-hat it may be readily applied to perforating and other machines having a traveling lcarriage which is to be fed forward.

inthe drawings-Figure l is a perspective viewbf the entire mechanism; Fig. 2 is a plan view of the mechanism applied to the machine, a fragment only of the latter being shown; Fig. 3 is a longitudinal section of the parts which co-act-with the feed rack of the carriage; Fig. 4 is a plan view thereof; Fig. 5 is a cross section on the'line 5 5 of Fig. 3; and Fig. 6 is a perspective view of a portion of the' mechanism.

Referring specifically to the drawings, denotes a fragment of the frame of the machine to which. the linvention is applied. The feed mechanism only has been shovvn, all other parts being left off for the sake of clearness, they forming no part of the present invention. The carriage 11 travels-on rails 12 and carries a feed rack 13. Avveight la is connected bya .line l5 to one end of .55 l

the feed rack, said line passing over. a guide pulley 16. y The Weight serves to feed the Specification of Letters Patent. Pat-911139@ B131', 21, 1911 Application led December 6, 1910. Serial No. 595,880.

Beneath the feed rack, in close proximity.

thereto, is located a bracket 17, said bracket being secured in a suitable manner to the One end of the bracket sup' frame n l0. ports a rotary shaft 18 on which, is rotatably mounted a sleeve 19, the latterheing supported by the other end vof the bracket. The shaft and sleeve lie parallel to the feed rack. On one end of the sleeve is a tooth Q0 which is adapted to engage the teeth of the feed rack. The shaft, adjacent to this end ofv the sleeve, carries a sleeve 2.1 which is provided with a number of steps Q2, said sleeve being fixed tothe shaft so as to turn therewith. rIhe internal diameter lof the sleeve 19 is greater than the diameter of the shaft 18, and on the shaft is a second sleeve 23 which is loose thereon and'also fits loosely Within the sleeve 19 sovthat it is free to move lengthwise on the shaft 18. The sleeve 23 has a tooth Qet on one ofits ends which is also designed. to engage the teeth of the feed rack, and to one side of the tooth 20 the end of the sleeve has a notch.

25 adapted to be entered by the tooth- 24, said tooth when thus located in the notch being on one side of the ytooth 20, in alinement therewith, and close thereto. The steps 22 are in the path of the tooth 24. To prevent relative rotation of the sleeves 19 and Q3, the former :has a longitudinal slot 2G into which extends a4 pin 27 carried l by the latter. The end of the sleeve 23, op-

posite its toothed end is engaged by one end of a spring` .28 which is coiled around the shaft 18 within the sleeve 19, the other end of the spring abutting against a shoulder in said sleeve 19. Gn the shaft 18 is made fasta pinion 29, and on the sleeve 19 is l,

is not actuated untilit is engaged by the levers, it will be seen that the'extent'of the swing of the yoke is variable. The "key which is above` the lovvestistep imparts va.q

minimumA swing to the yoke, v"and the key which is above the highest step imparts a clear.

`maximum swing to the yoke. The purpose of this construction will be presently made The number of keys corresponds to the' number of steps 2 2.

To a bracket 35 mounted on some fixed portion of the machine. is fulcrumed a bellcrank lever36 having one of its arms connected by a' pin-and-slot connection to one of the side arms of the yoke 33. The other arm of the lever is connected to a rack bar 37 which is slidably mounted'x in suitable guides onthe machine. The pinion 29is in m'esh with this rack'. The pinion 30 is in mesh with a rack bar 38 whichis slidably mounted-in'guides similarl to the rack bar 37.

Beneath the yoke 33 is located av second yoke 39 which is so located that-it is actuated by the yoke 33 when the latter has reached nearly the end of its downwardtravel. The yoke 39 is also fulcrumed'l to a fixed part of the machine, and one of itsside arms has an arm 4() to which the rack bar 38 is connected. Upon depressing any one of the' keys 31, the yoke 33, through the corresponding lever 32, is swung downwardly and by reason ofthe connection between said-*yoke and the rack bar 37, the latter is` moved lengthwise and thus actuates the pinion 29. At the end of the downward swing? of the yoke 33, it engages the yoke 39 andj also swings the same downwardly, thus rotating the .pinion 30 through the rack bar 38,-

by reason of the connection of the latter with the yoke 39. The two rack bars move 'in opposite directions, and the pinions are therefore rotated in opposite directions.v

Across the top of the levers 32 extends a stop bar 41'which limits the upward swing of their ends which are provided with the keys 31. A restoring spring 42 is provided forreturning the levers upon being released after having been depressed. This spring may be connected to one of the side arms of the yoke 33. The. yoke 39v also has a restoring spring 43.

'The operation of the escapement is as follows: The tooth 24is normally in engagement with the feed rack 13 and locks the carriage. To feed the carriage, Ykey 31 corresponding to the number of spaces which it is desired that the carriage move, is depressed, whereupon the pinions 29 'and 3()v are rotated in opposite directions through the

yokes

33 and 39 and the rack bars 37 and 38, as already described. The pinion 29 .is actuated before the pinion 30, as the yoke 39 is not actuated until the yoke 33 has reached the end of its downward swing. :Consequently lthe first movement is the'i'otation' ofthe shaft 18 through the pinion 29; This places one of the steps22- direct-ly in thev the pinion 30 and rack bar v38, whereupon` the sleeve 19 lis rotated, thus tooth placing the tooth 2O in engagement therewith. As soon as the tooth 24 leaves the feed rackit is 'shot.forwardly, out of the notch 25', in thedirection of the lenethffof theI feed rack, by the spring 28, until it is stopped b v the step 22, as shown in Figs. 1, 3 and 4. The key 31 is now released, whereupon the springs 42 and 43 restore the parts to their normal position. During this move` ment-the sleeve`l9 is rotated in a direction to disengage the tooth 2O from the feed rack and simultaneous therewith to engage the tooth 24 with the feedrack. The weight 14 now pulls. the'carriage forwardly, the tooth 24 being carried along by the feed rack and stopping the carriage when it renters the notch 25. The carriage thus travels forwardly the distance the tooth 24 was placed ahead of the tooth 20. The stepped sleeve 21 determines this distance, and is controlled' by the keys 31. The key 31 selected therefore dete-rmines the number of spaces the carriage is moved. Thus, if thc key of the lever 32, which imparts a maximum swing to the yoke 33, is selected, the shaft 18 is carrying the 24 away from the feed rack 13 andv the tooth 24 the step which is farthest from it during its normal position within the notch 25. By thus selecting the keys, a va riable feed of the carriage isv effected. One

tooth does not leave the feed rack until the other tooth has engaged the feed rack, so that the carriage is always under cont-rol of the device. The vmovement of the teeth to release and lock the carriage is transversely of the feed rack.

I claim:

.1. In an escapement mechanism, thecombinationwitha carriage, having a feed rack and feeding means; of holding members alternately engageable with'the rack, one of said members normally'engaging'the feed rack, and being slidable'in the direction of the length ofsaid feed rack in one direction when disengaged therefrom, and in the opposite direction ,upon again engaging the same, stops between which said member is slidable, one of said stops being fixed, andv the other stop being a rotatable member having ay series-of stops which are spaced different distances from` the Xed stop 'to determine the extent of the iirst-mcntioned sliding movement of the holding` member,

means for imparting a variable rotary m0vement to the aforesaid stop member to place a selected stop thereof into operative position.. ,l

2. 1n an es capement mechanism, the combination with. a` carriage having a feed rack and .feeding means; of holding members alternately engageable with the vrack,'one of said members `normally engagingthe feed rack, and beng'slidable in the dlrection of the length of said feed rack in one ldirection when disengaged therefrom, and in the op-- positodirection' iipon again engaging the same, stops between Which said member is slidable, one of said vstops being fixed, and the other stop being a rotatable member having a series of stops which are spaced different` distances from the fixed stop to determine the extent of the first-mentioned sliding movement of the holding member, means for imparting a variable rotaryY Inoveinent. to the aforesaid stop member to place a selected stop thereof into operative pesition, said means comprising a pinion on the rotatable member, a rack in mesh'yvith the pinion, a pivot/ed member operatively connected to the rack for actuating the same, and having a stepped portion, andy key-levers located above the steps ofthe pivoted member, and adapted to engage the saine to impart a variable swing to said member.

3. lIn an escapeineiit mechanism, the coinbination with a carriage having a feed rack and'feeding means; of holding members alternately engageable with the rack, one of said members normally engaging the feed rack, and being slidable in the direction ofy the length of said feed rack in'one direction When disengaged therefrom, and inthe op posite direction upon again engaging the same, stops between which said member is sli'dable, one of said stops being fixed, and the other stop being a rotatable member having a series of stops which are spaced different distances from the fixed stop to determine the extent. of the first-mentioned sliding movement of the holding member, means for imparting a variable rotarT movement to the aforesaid stop member to place a selected stop thereof into operative position, said means comprising a gearing lconnected to the rotatable member, a. pivoted .member operatively connected to the gearing for actuating the same, .and having a stepped portion, and key-levers located` above the steps of the pivoted member, and adapted to engage .the same to impart a variable swing to said member.

4. In an escapement mechanism, the combination with a carriage having al feed raelr and feeding means; of :i rotatable shaft eX.- tending parallel to the feed rack, asleeve rotatable on the shaft and having a tooth adapted to engage the feed racksaid tooth normally engaging the feed rack and being slidable in the direction of the length thereof, a stop on the sleeve for the sliding tooth,

an adjustable stop on the shaft for the slit ing tooth to determine' theextent of the slid.

ing movement. thereof, means for rotating `the sleeve tol alternately engage the teeth With and to disengage the same from the feed rack, and means for rotating the shaft to adjust the stop carried thereby.

5. In an escapement mechanism, the coin-l and feeding' means; .of "a rotatable-shaft ex-v y tending parallel `tothefeedy rack, a sleeve rota-tableon the shaft and having a tooth adapted to engage the feed rack, said tooth normally engaging thefeed rack and being. slidable inthe direction of .the length thereof, a stop on the .sleeve for the sliding tooth, a stepped member fixed to the. shaft, the

steps of said meinberbeing spaced different distances from thelslidable tooth todetermine the extent. of the sliding."ino-vement thereof, meansfor rotating the sleeve to alternately'engage the teeth with. and to disengagethe same fromthe feedrack, and means .for rotating the shaft'to place a selected step of the aforesaid member linto op-l erative position.

6. In `an escapeinent mechanism, the comv bination with a carriage having a feed rack and feeding means; of ai'otatable shaft extending parallel `to the .feed rack, a sleeve i rotatable on the "shaft and having a `tooth adaptedto engage `the feed rack, said toothI normally engagingthe feed rack andflie'ing slidable in the.` direction ofthe length thereof, a stop on the sleeve for the-sliding tooth, a stepped member fixed tex/the, shaft, .the

steps `of said member being ,spaced different'v distances from the slidabletooth` to '.detery mine the extentloffthe sliding movement thereof, meansfor rotating the sleeve to al`-`` ternately engage the teeth v,with andto disengage'the same from the feed rack, andv l means for rotating the shaft` to place a selectedstep'of the. aforesaid member yinto operative position, said means vcomprising a gearing connected 'to the shaft, aipivoted` member operatively connected tothe `gearinge for actuating the same, and having 'astepped portion, and key-levers above the steps of. the pivoted member, and adapted to engagev the sameto impart al variable swing to .said

7. In an escapement mechanism, theeombination 'With-a carriagehavingf a feed rack.

and feeding means; of a rotatable shaft-extendingparallel tov thefeedracliya sleeve .A

rotatable on the shaft and. having a tooth adapted to engage the feed rack, said tooth. normally engaging the feed rack and being slidable in the direction of the length thereof, a stop on the sleeve forthe sliding tooth, a. stepped member fixed to 'the shaft, .the steps of said member being spaced different distances from the slidable tooth to deter-i iine the extent of the sliding movement thereof, means for rotating the sleeve to alternately engage the teeth with and to disengage the same from the feed rack, and means for imparting a variable rotary motion to the shaft to place a. selected step of theaforesaid member into operative position. v

- 8. In an escapement mechanism, the com-- binatin with a carriage having a feed rack and'feeding means; of a rotatable shaft extending parallel to the feed rack, a sleeve rotatable on the shaft and having a tooth adapted to 'engage thefeed rack, said tooth normally engaging the feedrack and being bination with a. carnage having a feed 'rack and Vfeed-ing means; of'a-rotatable shaft extending parallel to the -feed rack, a sleeve .rotatable on theshaft and having avtooth i adapted togengage the feed rack, said tooth be1ngi .o1 1"2 one' endof thel sleeve, andy said I.end ofthe' sleeve having ay notch adjacent to ...thetoothysaid tooth normally seating in the ynotch and engagi'ngthe feed rack, and j beingslidablein the directionof the lengththereof, an adjustable stop the sliding movement thereof, means for rotating the sleeve to alternately engage the teeth Vwith and to disengage the sameA from ,the feedfraclz,.and means for rotating the shaft to yadjust the stop carried thereby.

10. In.` an escapement mechanism, the coinbination with'a carriage having a feed rack and feeding means; of a rotatable shaftextending-parallel to. the feed rack, a sleeve rotata'ble `on thejfshaft and having a tooth adaptedto engage the` feedrack, said tooth .normally engaging the feed rack and being -slidable in thedirection of the length there-` of, a stop on the .sleeve for the sliding tooth,

an adjustable stop on the -shaft for the sliding 'tooth to ldetermine the s'lidingvmovement thereof, means for rotating'the shaft toadjust the stop carried extent of the'I thereby, said means comprising a gearing connected to the shaft, a pivoted member operatively connected to the gearing for actuating the same' and having a stepped portion, and key-levers above the steps of the pivoted member and adapted' to engage the same to impart avariable swing to said member, and means for rotating'the sleeve to alternately engage the -teeth with and to disengage the same from the feed rack, said means comprising a ygearing connected to the sleeve, and a pivotedfmember operatively connected to said gearing, said member being in the path of the first-mentioned swinging member and actuated thereby.

11. In an escapement mechanism, the combination' with a carriage having'a feed rack and feeding means; iof forthe feed rack swinging transversely thereof, a second holding member swinging transversely and slidable in the direction of the length of the feed rack, said second holding member normally engaging the feed rack to lock the carriage, stops between which the second holding member is slidable, Oney of said stops being ixed'and the other stop being adjustable to determine the lextent of thev sliding movement ofthe memon the shaft for be .the slidingtoothto determine theextent Iof 'r, means for setting the adjustable stop, means for releasing 'the second vvholding member from the feed rack and engag'in the other holding member therewith, yield-- ing means for `sliding the second holding member against the `adjustable stop -When thus released from thefeed rack, and means forV releasing the first-mentioned holding member from the feed rack` and restoring `the second holding member to engagement therewith to effect the release of thecarriage, said. second holding member traveling with the carriage and lockingthe same upon engaging the first-mentioned stop.

' In testimony whereof I aiiix my signature in presence of two witnesses.

i OWEN MCCANN. Witnesses:

LEE SHAQKELFORD, L. DAUGBERTY.-

a holding member