US2887206A

US2887206A - Vertical spacing device for typewriters or the like

Info

Publication number: US2887206A
Application number: US472388A
Authority: US
Inventors: Louis F Hageman
Original assignee: Moore Business Forms Inc
Current assignee: Moore Business Forms Inc
Priority date: 1954-12-01
Filing date: 1954-12-01
Publication date: 1959-05-19
Anticipated expiration: 1976-05-19
Also published as: GB868694A

Description

y 1959 L. F. HAGEMAN- 2,887,206

VERTICAL.- smmc DEVICE FOR TYPEWRITERS OR THE LIKE Filed Dec. 1. 1954 2 Sheets-8heet 1 lllllll INVENTOR Lows F. HAGEMAN Q/ BYMIJQ ATTORNEY 5 May .19, 1959 L. F. HAG EMAN VERTICAL SPACING DEVICE FOR.TYPEWRIT ERS OR THE LIKE Filed Dec. 1. 1954 2 Sheets-Sheet 2 IN VENTOR Louis F. HAGEMAN ATTORNEY5 operation until the form is complete.

United States Patent Chico VERTICAL SPACING DEVICE FOR TYPEWRTIERS DR THE LIKE 18 Claiu ns. (Cl. 197-114) This invention relates to a vertical spacing device for :Louis F. Hageman, Lewiston, N.Y., assignor to Mdor'e imprinting machines or the like and is particularly adapted (it a for use in connection with typewriting machines to bring predetermined lines on the typing paper to the typing position quickly and accurately. In connection with filling in blank forms on a typewriter, it is necessary for the typist to move the first dew sired line on the form to the typing position, type the required information, move the next desired line into position, type the required information, and repeat this Often the blank lines are not evenly spaced and in addition the space between blank lines is often more than the movement provided by a single operation of the conventional line spacing mechanisms with which a typewriter is normally equipped. Also the number of lines of information to be typed at a given blank space on the form often varies so that even if the blank lines were equally spaced the distance between the end of the information typed at one blank space and the next blank space would notbe uniform. Thus, it will be appreciated that the variable conditions associated with typing blank forms render it impossible for the typist to move quickly and accurately from one blank line to the next by operating the convenventional line spacing mechanism which moves the form an equal amount upon each operation of the mechanism.

An object of this invention then is to provide a vertical spacing device which may be used on conventional typewriters to move a blank form quickly and accurately from one desired position to the next regardless of variations .in the distance between such positions and regardless-of variations in the number of lines positions.

Although the vertical spacing device of this invention is very helpful in typing forms consisting of separate individual sheets, it is most effective when used with forms which are prepared on a continuous strip or web.; Accordingly, a further object of the invention is to provide a vertical spacing device which will move a strip or web of forms so that after the last space on one form is typed the first space on the next form may be quickly, and accurately moved into typing position.

, writer; J

to be typedat such A further object of the present invention is toprovide a vertical spacing device wherein one completecycle of operation of the device will provide a feeding movement of exactly one form length. Naturally, forms are not all of the same length and therefore another object is to provide a device having means whereby it may be adjusted to accommodate forms of different lengths so thatone complete cycle of operation of the device willprovide a feeding movement of exactly the form length being used.

An additional object is to provide a vertical spacing,

device in which movement from one vertical space to the next is accomplished by one continuous motion of ,the device even if the distance between said space is a full form length as will be the case when only one blank line is to be typed on each form. M

,A further object is to provide a verticalline spacing device which may be superimposed on conventional typewriter feeding mechanisms without interfering with the operation of suchconventional feeding mechanisms.

Another object of this invention is to provide a vertical spacing device for use in connection with conventional typewriter feeding mechanisms 'in which said device has a manually operable handle and movable stop means which are engageable with stationary stop means when said handle is manually operated to drive said conven- 'tional feeding mechanism and in which said movable Ls to p means are relieved from engagement with said stationary stop means when the handle is driven by said conventional, feeding mechanism. t

A further object is to provide a crank handle for a vertical spacing device wherein said handle has a lost motion connection with said device and carries a stop member which is rendered effective by the lost motion action of said connection to limit the movement of said handle.

An additional object is to provide a vertical line spacing device which may be easily and quickly attached to conventional typewriters of the type having a rotary .platen, and further which may be attached to the platen carriage of such a typewriter without interfering with the normal actionof the carriage. r

A further object is to provide a vertical spacing device having an operating handle which is repeatedly movable through a pre-determined cycle and infinitely adjustable means for stopping the movement of said handle at any desired position in said cycle.

Otherandfurther objects, features and advantages will be apparentfrom the description which follows, read in connection with the accompanying drawings in which;

Fig. 1 is an exploded perspective view showing the vertical spacing device and a conventional typewriter with the device in position for attachment to the type- Fig. 2 is an end elevational view of the devicev with parts cut away and showing two operative positions for the device; Y Y

Fig. 3 is an end view showingthe device attached to a typewriter and with a cover plate of the device removed; Fig. 4 is an elevational view of the inner side of the operating handle of the device; Fig. 5 is a sectional view on theline 55 of Fig. 3; Fig. 6 isa sectional .view on the line 6- -6 of Fig Z; and 1 Fig. 7 is a .perspectiveview of one of the stationary ,stops for the vertical spacing device. Referring to the drawings in more detail, a conventional typewriter is indicated generally at 10 in Fig. 1. The portion of the typewriter illustrated includes a platen 12 mounted on a shaft 13 which is supported ona carriage having an end frame 15. As previously stated, the j vertical spacing device of this invention providesflthe most efiicient typing operation when used in connection with blank forms in a continuous strip or web. Accordingly, a conventionalstrip orlwebfeeding device is indicated at 17. 'Any equivalent device for accurately feeding strips or webs could, of course, be used. r

A preferred embodiment of the vertical spacing device, indicated generally at 20, is shown in Figs. 1-7 and includes and end frame 25 which is particularly designed for' attachment to the specific typewriter shown in Fig. 1. Minor modifications are, of course, contemplated for adapting the device for connection to other specific type- :writers. Frame 25 carries a side flange 26 part way around its periphery to protect the interior of the device 20. A shank nut 27 is designed so that its shank will pass through boss 28 on frame 25 and screw onto stop bar of thetypewriter after the usual stop bar nut 30 has'been removed. Collar 32 on shaft 33 of the typewriter fi's removed and the boss 35 formed integral with frame 25 then receives shaft 33. A screw 38 engages the top of the typewriter frame 15 and is threaded into a hole in the back of frame 25 at the position indicated in Fig. 3. If desired, an additional screw 40 may be inserted through hole 41 in frame 25 and threaded into the hole 42 in the typewriter frame 15. The several unnumberedholes shown in frame 25 are for the purpose of adapting the frame for attachment to various other specific typewriters.

Operating means for the vertical spacing device are provided in the form of a handle unit indicated generally at 50. It is, of course, necessary that the operating means or handle unit 50 be drivingly connected to the ,ing connection includes two

main gears

52 and 53 and an intermediate gear 54. ,Gear 53 is journalled on a stub shaft 55 secured to the frame 25, and handle unit 50 is secured by means of set screws 56 to a shaft platen shaft 13,'and the means for providing such driv- 57 formed on gear 53. As shown best in Fig. 5., gear v 52 has a hub 58 which is receivable in opening 59 in the plate. 25. Gear 52 is suported by platen shaft 13 to which it may be secured by set screws 60. The three

gears

52, 53 and 54 are designed so that rotation of handle unit 50 through 360 degrees will advance a strip of forms a distance exactly equal to one form length.

Since forms come in various lengths, a plurality of interchangeable gears 53 each having a different size may be supplied with the spacing device, with each separate gear 53 corresponding to a particular form length. In order that various size gears 53 may be used interchangeably, gear 54 has been adjustably mounted. As seen best in Figs 3 and 5, gear 54 is .adjustably mounted on plate 61 which .is. attached to the frame 25. Plate 61 has a raised portion 62 which forms. in cooperation with plate 25 a partial annular passage 63 A nut 65 having a,,shape similar to that ot passage 63 is slidingly but not rotatably received in thefpassage. A hearing insert 6'? is inserted in gear 54 t and is secured to nut 65 by means of screw 69 which passes through the partial annular slot 70 formed in the raised portion 62 of plate 61. As shown in Fig. 5, the bearing insert 67 extends slightly beyond, gear 54 and engages the plate raised portion 62 so that there will be no binding between the plate and the gear. It will beseen that the center of the annular passage 63 and the center of the annular slot 70 are both coincident with the center of gear 52, so that gear 54 will always ,be in proper engagement with gear 52 regardless of the position of gear 54 along slot 70. For example, if it. is desired to use the device with a blank. form which is shorter than the form for which gear 53 in the drawings is designed, gear 53 is replaced by a smaller gear,-and gear 54 is moved to the right in Fig. 3 until it properly engages the smaller gear, at the same time retaining its engagement with gear 52.

The various parts of the spacing device, which have been thus far described, provide a means ,for rotating platen shaft 13 and thus moving the typing paper vertically. The means for determining the extent of such movement will now be described. An indexing plate 75. is attached to frame 25 by means of the two screws 78 and 79 threaded respectively into the spacing tubes 80 and 81 which are secured to frame 25. When plate 75 is thus attached to frame 25, it engages the edge of flange 26 for additional support and to protect and cover the gears. Plate 75 includes means, for adjustably positioning a plurality of stationary stops 84 in a circular path, having its center coincident with the center of rotationof handle 5.0. Such means comprises a plurality of threaded holes 86 spaced equally around said circular path in a shallow annular groove 87. Each of thestops 84 includes a curved supporting flange 88 slidably engaging the walls of groove 87'and having a .eurvedslot 90. Each of the stops 84 is secured to, the plate 75 by means of a screw 92 which passes loosely 4 through slot with its head in engagement with flange 88. Groove 87, flanges 88 and slots 90' all have their centers of curvature coincident with the center of rotation of handle unit 50 so that all the stops 84, regardless of their positions around groove 87, will be located the same radial distance from the center of rotation of handle unit 50. It will be noted that the distance between the ends of each slot 90 is at least as great as the distance between the opposite edges of any two adjacent holes 86. As a result of this relation between the holes 86 and slots 90, a stop 84 can be infinitely positioned at any desired point around groove 87, instead of just being positionable at the finite spaced points defined by holes 86.

Having provided adjustable stationary stops 84, a cooperating movable stop has been designed in association with handle unit 50 as will now be described. Handle unit 50 includes an inner arm and an outer arm 102 pivgtally connected to arm 100 by means of the rivet 104. The inner end of arm 100 carries a hub 106 which,

as previously explained, is secured to gear 53 by means of 116 ispivotally connected to the outer end of arm 102.

Thus, it will be seen that there is a lost motion connection in'handle unit 50 between hand grip 116 and gear 53.

gears 52, 53 and 54 are so arranged that forward feeding of platen 12 and the typing paper is accomplished by clockwise rotation ofthe handle unit 50 as viewed in Figs. 1 and 2. As a result of the inertia and frictional resistance to movement of the gears and the platen shaft '13, outer am 102 pivots clockwise about rivet 104 when hand grip 116 is turned clockwise as viewed in Figs. 1 and 2. The pivotalmovement of arm 1112 continues until rivet 110 engages one end of slot 112 and thus arm 102 is positioned at one of its end limits as shown in broken lines in Fig. 2. In such broken line position the movable ,stop 114 is, pivoted into the circular path in which stationary stops 84 are positioned. When hand grip 116 is released, theouter arm 102 is returned to the other of its; end limits shown solid in Fig. 2, by means of a light spring 120 secured at, its ends to the inner and

outer arms

100 and 102. After spring 120 has returned arm 102 to the position shown solid, it will be noted that the movable stop 114, is thus pivoted to a position outside the circular path in which the stationary stops 84 are positioned, Thus it will be understood that the stops 84and 114 are normally ineifective to restrict movement of the handle unit 50 and that the stops automatically become eflectiveupon actuation of handle unit 50 in a clockwise direction.

A cover disc 122 is secured to the handle unit 50 by means of a screw 124 threaded into a hole 125 (Fig. l) in the inner arm 100. Disc 122 has a peripheral flange Q126Qwith a cut-away portion 127 which receives the

arms

100 and 102,' and a groove 130 is provided in the top of disc 122 for the reception of the head of rivet 104. An

indexing line 132 is provided on disc 122. It will be noted in Fig. 7 that the flange 88 of one of the stationary stops 84 carries an extension 134 which extends slightly beyond the periphery of dis ,c 122, as can be seen in Fig. 2. The purpose of the extension 134 and the indexing line 132 s, tp provi de visualmeans for determining areference position for, the spacing device.

The manner in which the vertical spacing device is assembled on a typewriter is as follows. The conventional right hand platen knob, not shown, is removed from the end of shaft 13, and if the typewriter has a cover plate, not shown, over the rightend of the platen carriage, such plate is also removed. Next collar 32 is removed from shaft 32 and nut 30 is removed from stop bar 29. The typewriter is thus prepared for installation of the vertical spacing device. The frame 25, carrying the gears 53 and 54, is then positioned with its boss 35 journalled on shaft 33 and its boss 28 loosely positioned around stop bar 29. Shank nut 27 is then inserted through boss 28 and screwed onto stop bar 29. Next, screw 38 is threaded into frame 25 with the head=of the screw engaging the top of carriage frame 15, and finally screw 40 may be inserted through hole 41 in the frame 25 and threaded into hole 42 on the frame 15.

' When the frame 25 of the spacing device has thus been connected to the typewriter, the platen shaft 13 will extend through hole 59 in the frame, and gear 52 is then connected to the shaft. Next the indexing plate 75 is attached to frame 25 by means of the screws 78 and 79. Handle unit 50 is then connected to the shaft 57 formed on gear 53, and finally, cover disc 122 is secured to the handle unit 50 by means of screw 124. It should be noted that the vertical spacing device 20 is designed so that when it is attached to the typewriter carriage frame 15, it does not protrude in any direction which will interfere with movement of the carriage. Having described the structural details of the vertical spacing device, its operation in connection with a typewriter will now be explained. After a strip of blank forms has been loaded on the typewriter feeding mechanism, such as the pin feed indicated at 17, the first desired writing line on the first form is brought into typing position by using the conventional left hand platen knob, not shown. The stationary stop 84 having the extension 134 is then positioned on plate 75 to contact movable stop 114 when the outer arm 102 is rotated about its pivot 104. Then the left hand platen knob is rotated to bring the next desired line into typing position and a second stop 84 is secured on plate 75 in contact with movable stop 114 when the outer arm 102 is rotated about its pivot 104. This procedure is repeated until a stationary stop 84 has been provided for each desired line on the form. It should be noted that only the stop corresponding to the first typing line has the extension 134.

Thus, it will be appreciated that as hand grip 116 is turned clockwise, as seen in Fig. 2, the outer arm 102 will'first pivot about the rivet 104 until one end of slot 112 engages the rivet to form a direct drive between arm 102 and arm 100, and thereafter, continued rotation of hand grip 116 will rotate

arms

102 and 100 as a unit until stop 114 engages the first stationary stop 84 to bring a desired blank line into typing position. Grip 116 is then released and spring 120 pivots arm 102 until the opposite end of slot 112 engages rivet 110, bringing arm 102 to the position shown solid in Fig. 2. In this position, movable stop 114 is outside the circular path in which stationary stops 84 are positioned and typing may be commenced in the usual manner. If more than one line of typing is necessary, crank unit 50 will be rotated by the accompanying rotation of platen shaft 13 by means of reversedrive through

gears

52, 54 and 53.

When said first blank space has been filled in, hand grip 116 is again turned clockwise until the next stop 84 is engaged by the movable stop 114. It will be appreciated that'here again the initial movement of hand grip 116 does not move the inner arm 100 because of the inertia and frictional resistance of

gears

53, 54 and 52 and the platen shaft 13. Instead, the initial movement of outer arm 102 is a pivotal movement relative to arm 100 about the rivet 104. It should be noted that spring 120 is light enough to exert less effective force than said inertia and frictional resistance. Spring 120 need merely be strong enough to return the outer arm 102 to the positionshown solid in Fig. 2 after hand grip 116 has been released. When typing a strip of forms, the operator is always able 'to tell at a glance when a new form is positioned with its first desired blank line at the typing position, since the index line 132 will'always be adjacent the step 84 which is provided with the extension 134 wh'en the first blank line of each form is in typing position. a

In order to facilitate-an understanding of the invention reference has been made to the embodiment thereof shown in the accompanying drawings, and detailed descriptive language has been employed. It will nevertheless be understood that no limitation of the invention is thereby intended and thatvarious changes and alterations are contemplated such as would ordinarilyoccur to one skilled in the art to which the inventionbrelates. For example,-the vertical spacing device has ben'described With specific relation to a typewriter, but it should be understood that the spacing device is also applicable for use generally with imprinting machines or the like which move paper past an.operating position where they perform some operation such as printing, typing, or perforating. Y

Having thus described the invention, what is claimed' as new and desired to be secured by Letters; Patent isz 1. A vertical spacing device for imprinting machines or the like, said device comprising a rotatable handle unit having an inner arm and an outer arm pivotally connected to the outer portion of said inner arm, means for drivingly connecting said inner arm to said machine, means providing end limits for the pivotal movement of said outer arm relative to said inner arm, a plurality of stationary stops each positioned the same pre-determined radial distance from the centerof rotation of said handle unit and all positioned in a single plane at right angles to the axis of rotation of said handle unit, a movable stop formed on said outer arm and in the same plane as said stationary stops, said movable stop being movable radially of said handle unit as said outer arm is pivoted, said movable stop being positioned at said predetermined radial distance when said outer arm is pivoted to one of said end limits and being displaced from said radial distance so as to be relieved from engagement with said stationary stops when said outer arm is pivoted to the other of said end limits, and spring means normally urging said outer arm to said other end limit.

2. A vertical spacing device as claimed inclaim l in which said means for drivingly connecting said inner arm to saidmachine comprise two main gears and an intermediate gear in mesh with each of said main gears, one of said main gears being removable whereby it may be replaced by a gear of different size, and means supporting said intermediate gear for adjustment along an arcuate path having its center coincident with the center of the other of said main gears. i

3. A vertical spacing device as claimed in claim 1 in which means are provided for visually distinguishing one of said stationary stops from the remainder ofsaid stationary stops. r i 1 4. A vertical spacing device as claimed in claim 1 in which said stationary stops are adjustable, and in which means are provided for positioning an individual stopat any position around a circle having its center coincident with the center of rotation of said handle unit and having a radius equal to said pre-determined radial distance.

5. A vertical spacing device for imprinting machines or the like having paper feeding mechanism, said device comprising a frame adapted to be securedto said machine, an operating member comprising an inner arm rotatable relative to said frame, and an-outer arm pivotally connected to said inner arm for movement about an axis generally parallel to the rotational axis of the inner arm, means for drivingly connecting said inner arm and said feeding mechanism, said outer arm having a handle for manual rotation of said operating member, stationary stop means adjustably secured to said frame, a movablestop actuated by said outer arm, cooperating abutments on said inner and outer arms providing end limits for pivotal movement of said outer arm relative to said inner am,

said movable stop beingpositioned: for engagement-with.

,ing unitjfonsaid.device comprising an; inner arm. adapted H tably-secnred to,said device .at the center of said eireul. ath,,i an;outer=;arm pivotally connected to said nu rc rmaabarposition.radially outward of said center for moyemen aboutganraxis. generally parallel to the rotational-axis of; the inner. arm, cooperating abutments on said: inner and*out e r ;ar;m.s providing end limits for pivotal Increm nt; -s idtoutenzarm relative tosaid inner arm, stop means positioned on said outer arm so that whensaid ar-nrj;is,a.t,= one: of aid::.end limits. of pivotal movement and aid operatingyun s rotated saidstop means will rotate a1 circular path, saidstop means being movable os Position. outside said. circular .path. when said .outer alTm" .CPiYQt6dj tQrtl16 O'EhfllgOfSfiidfiIld limits, and spring means normally. retaining; said outer armat said-other enddimitof; pivotal movement. 71.- A verticalnspacing device for imprinting machines orzxt 'e ilge,; saiddevice comprising means, for. securing a plnr. y.-;of stationary stopsqin. a circular path, an operatinghandlei it pivotedat; the center of said circular path, and; vablestopgcarriedby said. handle unit, said handle-smitincluding -means;.-asso.ciated therewith for move-' inept-relativethereto in thedirectionof pivotal movement qfis'a il handleunitfor providing movement of said movable stop:int and out-.ofsaid-eircular path.

8;.,I1 1;,,cor.nbination With:.a'-typ6W1'i1l6I\ having a. frame and. aPlflten; rotatable relative to said frame, a vertical spacing; device.comprising'operating means drivingly connected ':tO,, ,S2\id'5 platen. and pivotally supported relative to said-frame, stationary stop means. secured against movement-malady; tdsaidq.frame, movable stop means normally positioned out of engagement. with said stationary stop nieans,-.and; means, pivotally carriedv by said operating mean. supporting. saidmovablel stop means for movement relativetqsaid;operating: meansboth transversely to the pivotal axis-.ofsaidoperating meansaand in the direction f- 'votahmovementiof said operating means .into engagementawith. said:.stationaryrstop. means. upon actuation of saidroperating.imeanss 9.'.The.;..combination/claimedain claim 8 in which said pivotally supported operating meansyisrotatable' inone direc ion; throughsw degrees.

I -JAi Verti al'spacin'grdevice for imprinting machines orz-zthesl ke, aiidevicmcomprismg rotatable operating means, means for drivingly connecting said operating meansrtoisaid device,..means.ztor securinga plurality of stationary -stop.s;-,in ,.a..- circular path having its center coincidenhswith;;the.;center'- of rotation of said rotatable operating means, and movable stop means connected tQ-..said .operatingi means, said.v operatingv means including meansrcarriedfbysaidoPerating means for movement relative thereto "in ythegdirectio'n of rotation thereof for movi g.jsaidlrnovable-stop=means into and out of said cireulenpathl.

1l..-.-A vertical: spacing; device. for imprinting machines ofthea ez'comprising means; for. operating said device, said; operating :meansbeing-continually rotatable in one direotiom means fcir: drivingly connecting said operating me H5710 said device,;and,.stop means for stopping said operating;.;meansf at...pred,etermined. positions of rotation, aid; s onmeansdndnding: means carriedby said operating-meansifor movement relative; thereto in the direction of rotationof andtransversely to. the rotational axis. of sai operating-means.

. 1:2 vertieal spacing device for imprinting machines Qnit ei-zl QI I)P QiI;1g;:.II .QLBS::fOD. operating, said device,

said operating means being continually rotatable in; one direction, means; .for.driving1y connecting said.:.operating means tosaid. device, and .stop means normally ineffective to interrupt rotation of saidoperating means, saidstop means includingia movable stop carried :by the operating means for; movement; relative thereto in thedirection of rotation thereof and radially to said operating means andbeing automatically effective upon actuationiofsaid operating means to stop said operating means at, pre+ determined positions of rotation.

13. A vertical spacing devicefor imprinting machines or the like comprising rotatable means for operating said device, means. for drivingly connecting said operating means. to said device, and stop means normally ineffective to restrict movement of said operating means, said stop means including means. connected to said operating means for movement relative thereto, radially and in thediirec; tion of rotation thereof to stop said operating means at predetermined positions of movement.

14. A vertical spacing device for imprinting machines or the like having paper feeding mechanism, said device comprising a frame adapted to be secured to said machine, an operating member rotatable relative to said frame, drive means for connecting said operating member and said feeding mechanism so that operation of one will drive the other, stationary stop means adjustably secured to said frame, and movable stop means carried by said operating member for relative movement radially thereto and in the direction of rotation thereof into engagement with said stationary stop means when said operating memberis rotated to drive said feeding mechanism and for. nonzengagement with said stationary stopv means.

when said, operating member isv driven by said feeding mechanism.

15. A platen advancing mechanism for a writing machine adapted to move continuous form stationery through the machine to a predetermined position on each form length, comprising: a frame for attachment to the writing machine; a rotatable shaft. journalled in the frame; connecting means for providing a driving connection from the platen to said rotatable shaft; a platen advancing lever secured to said shaft and swingable between a forward and a rearward position, said lever including a handle portion and a handle mounting portion on the shaft, the handle portion having a lost motion connection with the mounting. portion providing for movement between the two portions in the planeof the are through which the lever is swung to advance the platen and a pair of cooperating studs, one of the studs being secured to the frame, and the other stud being secured to the handle portion, the lost motion connection permitting said other stud to be moved from a path clearing the one stud to a path intersecting said one stud when the lever .is advanced forwardly, the engagement of the studs arresting forward movement of the lever and stopping the platen in a predetermined position.

16. Mechanism as specified in claim 15, in which the handle portion is normally urged to a position in which the stud thereon will lie in a path clearing the stud on the frame so that the manual release of the handle portion of the lever will permit the. studs to move out of engagement.

1 7. Mechanism as specified in claim 15, in which the handle portion is pivoted to the handle mounting portion, tie lost motion. connection limiting pivotal movement between said two portions, and spring means are provided to normally pivot one of the portions to a positionin which.thc other stud will occupy a path clearing said one stud.

l8..-A platen advancing mechanism as specified in claim l5, in which the handle portion is pivoted tothe handlemounting portion, and the lost motion is provided byan enlargedopening in one of the portions, a pin on the other of the portions of a size considerably smaller than-theopening and projecting :therethrough, and. means 9 10 normally holding said pin against an inner marginal edge References Cited in the file of this patent of said opening at one limit of the lost motion eonnection whereby initial movement of the lever forwardly UNITED STATES PATENTS pivots said handle portion with respect to said handle mounting portion to reposition said pin at the other 5 848678 Mccormack 1907 limit of the lost motion connection so that the pin will 931,680 Cooper 1909 carry the portions forwardly as a unit during further 1,089, 65 OO OraP Mali 1914 forward movement of the lever.