US1388164A - Typewriting-machine - Google Patents

Description

H. E. mnswmn.

Typewmrmc MACHINE.

APPLICATION FILED IAN. 8,1921.

Patented Aug. 23, 1921-.

2 SHEETS-SHEET L.

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TYPEWRITING MACHINE. APPLlcATloN FILED ;AN.8,1921.

l' 1,388,164. Famed Aug. 23, 1921` 2 SHEETS-SHEET 2 wwm /M/ m7/ VHEATTURNEY UNITED STATES i PATENT OFFICE.

HERBERT E. EEIDGWATEE, 40E sYEAcUsE NEW YORK, AssIGNoR 'ro REMINGTON TYPEWRITER COMPANY, OF ILION,

YORK.

T 0 @ZZ w hom t may concern Be it known that I, HERBERT E. BRIDG- warnn, a citizen of the United States, and resident of Syracuse, in the county of @nondaga and State of New York, have inventedcertain new and useful Improvements in Typewriting-Machines, of which the following is a specification.

My invention relates to typewriting machines and more particularly to back spacing mechanism for such machines.

One of the main objects of the invention, generally stated, is to provide simple and highly efficient back-spacing mechanism. A further object of the invention is to provide an improved construction in which the back spacing device may receive a case shifting movement with a shiftable platen and shiftable rack, and yet always remain connected with the back spacing key carried by a fixed portion of the machine.

' To the above and other ends which will hereinafter appear my invention consists in the features of construction, arrangements of parts, and combinations of devices set forth in the following description and particularly pointed out in the appended claims.

In the accompanying drawings wherein like reference characters indicate corresponding parts in the different views,

Figure l is a fragmentary detail plan view, with parts omitted, of the back spacing mechanism and some of the associated parts, the view, generally speaking, corresponding to a section taken on the line win Fig. 2 and looking in the direction of the arrows at said line.

Fig. 2 is a detail vertical fore and aft sectional view of the same.

Fig. 3 is lan enlarged detail fragmentary front elevation of some of the parts shown in the'preceding figures, and as they are viewed from the section line g/-g/ in Fig. 2 and'looking in the direction of the arrows at said line. v

Fig. 4 is an enlarged detail fragmentary perspective view of the same, as seen from the rear.

The present invention is shown embodied in the Remington portable machine which is a light, compact, portable top strike machine of the general character disclosed in the patent to Arthur W. Smith, No. 1,342,513 dated June 8, 1920.

Specification of Letters Patent.

NEW YORK, A CORPORATION OFF'NEW TYPEWEITING-MACHINE.

Patentedk Aug. 23, 1921.

y Application filed January 8, 1921. Serial No.'435,974.

` While the back spacing mechanism of the present invention was devised more espec1ally for, and is particularly available in a machine of the character specified, and has some of the same general objects in view as the construction disclosed in the patent to Herbert E. Bridgwater No. 1,342,941 dated June 8, 1920, it should be-understood that the invention may be incorporated in various other Styles of typewriting or like machines.

An interior detachable frame which supports the working parts of the machine is itself contained within an outer sheet metal frame 1. The supporting frame comprises side plates 2, a front comb plate 3 secured to ears 4 on the side lates by screws 5, and a casting 6 fixed to the side plates by suitable screws. A type bar segment iconstitutes part of this casting and remains fixed while the platen receives a case shifting .movement relatively thereto, as will hereinafter appear. A top plate 7 is secured by suitable means to the side plates of the outer frame. A cylindrical platen 8 is mounted by suitable means on a sheet metal base plate 9 of a carriage, said base plate being formed with grooved raceways 10 and 11. Anti-friction crossrollers 12 are received in said raceways and are also received in raceways 13 and 14 formed in sheet metal plates 15 and 16 respectively. These last mentioned plates are secured to a shiftable carriage support 17 by suitable means, thus forming relatively fixed guide rails or supports on which the carriage is adapted to travel on the cross rollers 12 from side to side of the machine. Sheet metal fingers 18 are -formed integral with an intermediate connecting plate 19 and are secured at 20 to thebottom of the sheet metal base plate 9, the fingers 18 extending rearwardly beneath the relatively fixed guide rail 15, and normally out of contact therewith. The purpose of the fingers 18 is to f prevent an accidental displacement or liftare arranged adjacent to the side plates 2 and are pivoted at their forward ends, at 25, to depending links 26 pivoted at their upper ends, as at 27, on the side `plates. 2 of the supporting frame. The plates 24 are provided with downwardly projecting arms 28 arranged beneath the carriage support 17, and each is connectedlto one end of a .oontractile spring 29, the opposite end of which is connected to a pin 30 projecting from the Yadjacent side plate 2 of the inner frame.

The carriage is thus supported for case shifting movement fore and aft of the -machineuuder lcontrol of suitable case shifting devices not shown.

The forward portion of the sheet metal base 9 of the carriage, where it is bent down to form part of the raceway 10, is provided at its lower edge with downwardly projecting teeth 31 which constitute a back spacing rack formed, in the present instance, as an integral part of the V-sheet metal carriage base. This rack is separate and distinct from the ordinary feed rack 32 of the carriage, which latter is supported by a plate 33 pivoted at 34 to the carriage base plate, or to rsheet metal arms carried thereby. It will be understood that suitable means (not shown) are provided for moving the feed rack 32 on its pivotal support to disengage the rack from the feed dogs (not shown), and thus release the carriage, whereas the back spacing rack cannot be moved relatively to the base plate.

The back spacing devices, which are preferably made of sheet metal, are carried by a sheet metal bracket 35 secured by screws 36 to the carriage support 17 to partake of the case shifting movements of the latter. A sheet metal bracket arm 37 is secured to and projects upwardly from the bracket 35 in front of the back spacing rack 31 and to the left of the center of the machine. A pin 38 is fixed to and rojects rearwardly from the bracket arm 37) and is received in a slot 39 in a member 4() which constitutes a combined back spacing pawl and carrier preferably made from a single piece of sheet metal. A contractile spring 41 is connected at one end, as at 42, to the member 40, and at its opposite end 43 to an extension 44 of the bracket arm 37 The member 4() is provided with a laterally projecting integral back spacing pawl 45 which extends beneath the back spacing rack 31. The Aupper side of the member 40 is provided with a laterally projecting hook-like portion or engaging projection46, for purposes which will hereinafter more clearly appear. An actuating arm, lever or member 47, preferably made of sheet metal, is pivoted at its lower `end on a pivot screw 48 carried by the sheet metal bracket 35. The upper end portion of the member 47 is arranged beside the member 40, and `is recessed at 49 to receive the hook-like overlapping extension 46 of theV hook-like projection 46 on the pawl carrier.

A shoulder engaging portion or projection 51 is also formed ron the actuating member 47 for cooperation with the left-hand edge of the engaging projection 46, after the latter has been elevated by the `cam 50. A key actuated pull link 52 is connected at its inner end, as at 53, to the upper end portion of the actuating member to rock the latter on its pivot 48 from the normal position, shownin Fig. 3, to the actuated position. The actuating member 47 is guided and supported in this movement by an off-set extension 54 on the fixed bracket arm 37.

In the operation of the back spacing mechanism a pull on the link 52 is first effective to turn the actuating member 47 on its pivot, thereby bringing the cam 50 into engagement with the projection 46 on the pawl carrier. This causes the latter to turn on the pin 38 against the pull of the spring 41 vuntil the pawl 45 is fully engaged between two teeth of the back spacing rack 31. This moveinent of the pawl carrier is wholly a pivotal one, it receiving only a pivotal movement on the pin 38 at this time. When, however, the pawl 45 has fully engaged the rack, and the shoulder 51 reaches the left-hand edge of the projection 46, the member 40 will be given a sliding rectilinear motion on the pin 48 while the fiat face or dwell at the upper end of the cam 50 remains beneath the projection 46 and the back spacing pawl will be maintained locked in. engagement with the teeth, and prevented from disengaging the same during the entire back spacing movement of the carriage. Thus after the pawl 45 engages the rack 31,.and the actuating member 47 continues its move* ment to the right under the depression of the back spacing key, the shoulder 51 in engagement with the projection 46 causes the back spacing member 40 to move with the member 47 and receive a sliding movement on the pin 38 in the direction of the travel of the carriage to the right, and in the direction of the length of the back spacing rack. The effect of this movement of the member 40 is to carry the carriage with it, until the lefthand end of the slot 39 reachesithe pin 38, when further movement of the back spacing member and the carriage is arrested. The extent of this movement in the present instance is considerably morethan a letter` space distancel but less than two letter spaces. The effect of moving the carriage backin the manner described is to move it against the ordinary loose dog more than aletter space Y distance and less than two,`thereby causing the loose dog to engage the next tooth of the the dwell on the cam 50 being maintained'beneath the projection 46 and holding the back spacing pawl and carrier against a downward pivotal movement. lVhen pressure is released on the back spacing key the actuating member 47 will receive a pivotal movement to the left, and independently of the member 40 which is held in engagement with the rack 3l. This results in .first withdrawing the cam 50 from beneath the projection 46, thereby enabling the spring 4l to turn the member 40 on its pivot 38, thus lowering the back spacing pawl out of engagement with the teeth of the rack 31. The

spring 41 is then effective to slide the back spacing pawl carrier longitudinally of the rack 3l to the left and-back to normal position, shown in Fig. 3, where it is arrested by the right-hand en'd wall of the slot 39 striking the pin 38. The carriage in the meantime is held by the usual feed dog in the position to which it (the carriage) was shifted to the right. Each depression of the back spacing key is therefore effective to move the carriage one letter space to the right by first turning `the back spacing pawl and carrier on its pivot and then sliding the carrier together with the carriage to the right, the cam 50 constantly maintaining the back spacing pawl engaged with the rack teeth 3l after such engagement is oneeveffected, and until the release of the back spacing key. It will be understood therefore that an overthrow of the carriage to the right under a rapid or forceful .depression of the back spacing key is prevented. It will be understood, moreover, that the back spacing rack being fixed to or formed as an integral part of the carriage base, there is no liability of displacing the rack laterally during the operation of the back spacing devices, as sometimes occurs when the back spacing pawl operates on a releasable carriage feed rack. Moreover, it is unnecessary, in the vpresent construction, to provide vany special locking means or devices to prevent an accidental release of the rack with which the back spacing pawl coperates, as is sometimes done where the-back spacing `pawl co-acts with a releasable feed'rark, as in the construction disclosed for lexample lin the Bridgwater patent, hereinbefore 'referred to. v n

The back spacing devices are, as heretofore pointed out, shiftable with the carriage in the case shifting'movement of the latter, so -that they may properly coact with the rack 3l irrespective of the position to which the carriage may have been shifted. I have provided a back spacing key 55 which is carried by a fixed portion of the machine and suitable connections whereby theshiftable back spacing devices may nevertheless be actuated by said key. In the present instance this back spacing key is carried by a keylever 56 pivoted at 57 to a guide comb and support 58 secured by screws 59 to the fixedl casting 6. The key lever and the parts `controlled thereby are returned to normal position bya spring 56a. An upward-ly extending link 60 is connected at its lower end to the key lever 56, and at its upper end 6l to a vertically disposed sheet metal bell crank lever 62 pivoted on a pivot screw 63 carried by the right-hand side plate 2 of the supporting frame. The lower arm of the bell crank lever 62 is connectedto the forward end of a horizontally disposed link 65, the rear end of which is connected to one arm of a horizontally disposed sheet metal bell crank lever 66 that turns on a pivot screw 67 carried by the fixed casting 6. The rearwardly projecting arm of the bell crank lever 66 is connected by a pivot 68 to the horizontal pull link 52 hereinbefore referred to. It will be observed that the pull link 52 extends in the general direction of the travel of the carriage, being connected at its inner end to shift with the actuating` member 47 as the latter moves with the carriage support in the case shifting movements of the carriage. At this time the outer end of the link turns on its pivotal connection 68 withthe bell crank lever 66, as indicated in dotted lines in Fig. l. Thus while the back spacing key 55 is constantly maintained connected with the back space' actuating member 47, thel connections nevertheless do not interfere with the bodily movement of the back spacing devices with the carriage support as the latter is shifted to effect a case shifting movement of the carriage.

From the foregoimg description it will be understoodthat the lever 47 extends longitudinally transversely or at substantially right angles to the direction of sliding movement of the member 40, and that the construction is such that means are provided bel tween the members 47 and 40 for affording a movement of one of said members relatively to the other and for actuating one by the other, or causing them to move together.

It will be seen that all parts of the back spacing mechanism are made either of sheet metal or wire, and that the parts though light in construction and occupying but little space nevertheless are strong and efiicient in use.

The carriage constrution and mounting disclosed herein forms no part of the presen t invention but is claimed in a separate application of Joseph B. Holden filed February 24, 1921, Serial No. 447,533.

What I claim as new and desire to secure by Letters Patent, is

l. In a typewriting machine, the combination of a carriage, a releasable feed rack, a back spacing rack separate and distinct from said feed rack and fixedly connected to said carriage, a rigid back spacing pawl carrier mounted for pivotal movement and also for sliding movement in the direction of the travel of the carriage and provided withea fixedly connected back spacing pawl, a spring connected directly to said carrier for returning it to normal position, a key actuated lever extending transversely of the sliding movement of said pawl carrier and provided with a cam which coacts therewith to turn said carrier and engage the pawl thereon with the back spacing rack while said spring tends to resist a sliding movement of the carrier, and coacting means between said lever and carrier for aording a. movement of one relatively to the other and also for actuating one by` the other.

2. In a typewriting machine, the combination of a carriage support mounted to receive a case shifting movement, a carriage mounted to travel thereon and to shift therewith, a releasable feed rack, a back spacing rack separate and distinct from said feed rack and fixedly connected to the carriage, a back spacing pawl carrier mounted by a pin and slot connection on said carriage support to receive a pivotal and sliding movement and to receive a case shifting movement with the carriage when the latter is shifted, a back spacing pawl carried by said carrier, a key actuated lever carried by said carriage support and shiftable therewith, a cam on said lever which coacts with said carrier to turn the latter and engage the pawl with the back spacing rack and hold it thus engaged during the back spacing movement of the carriage, and separate means between said lever and carrier which affords a relative movement between the two but by which the lever is effective to take up and slide said carrier after it has been turned to engage the back spacing rack.

In a typewriting machine, the combination of a carriage support mounted to receive a case shifting movement, a carriage mounted to travel thereon and to shift therewith, a releasable feed rack, a back spacing rack separate and distinct from said feed rack and fixedly connected to the carriage, a back spacing pawl carrier mounted by a pin and slot connection on said carriage support to receive a pivotal and sliding movement and to receive a case shifting movement with the carriage when the latter isV shifted, a back spacing pawl carried by said carrier, a key actuated lever carried by said carriage support and shiftable therewith, a cam on'saidlever which coacts with said carrier to turn the latter and engage the pawl with the back spacing rack and hold it thus engaged during the backv spacing movement of thevcarriage, separate means between said lever and carrier which affords a relative movement between the two and by which the lever is effective to take up and slide said carrier after it has been turned to engage the back spacing rack, a back spacing key carried by a fixed part of the machine, and intermediate operative connections between said key and said lever which permits the latter to be shifted with the carriage in its case shifting movements while the key is held against such-movement.

4t. In a typewriting machine, the'combination of a carriage, and back spacing means therefor comprising two separate but copcrative sheet metal members arranged side by side and movable vrelatively one to the other, one member being in the nature of a back spacing pawl carrier mounted en its support by a pin and slot connection and on whichit may be turned to engaging position without sliding and thereafter receive a sliding motion to back space the carriage, a spring connected directly to said carrier, the) second member of said back spacing means being in the nature of a'leve'r which extends longitudinally at substantially right'angles to the sliding movement of the pawl carrier engaging projection, the pawl carrier having a laterally extending projection .that overlaps the lever member and is first engaged by the cam thereon to bring about a turning movement of the carrier while said springr tends to resist a sliding movement thereof and is then engaged by the hook-like projection on the lever to cause the carrier to receive a sliding movement, said cam having a-dwell that locks the carrier against disengaging movement throughout its back spacing movement.

5. In a typewriting machine, the combination of a. carriage, back spacing means therefor comprising two separate but coperative sheet metal members arranged side by side and movable relatively one to the other, one member being in the nature of a back spacing pawl carrier mounted on its support by a pin and slot connection and on which it may be turned to engaging position without sliding and thereafter receive a sliding motion to back space the carriage, the second member being in the nature of a lever which extends longitudinally at substantially right angles to the sliding movement of the pawl carrier and is provided with a cam and an engaging projection, the pawl carrier having a laterally extending projection that overlaps the lever member and is first engaged by the cam thereon to bring about a turning movement of the carrier and is then engaged bythe engaging yprojection on the lever to cause the carrler to yreceive apsliding and is provided with a cam and a hooklike movement, a carriage support mounted for case shift movement and carrying said members to shift therewith, a back space key carried by a fixed part of the machine, and intermediate operating connections between said key and lever which permit the latter to be shifted with the carriage support while the key remains at rest.

6. In a typewriting machine, the combination of a carriage, back spacing means therefor comprising two separate but cooperative sheet metal members, arranged side by side and movable relatively one to the other, one member being in the nature of a back Spacing pawl carrier mounted on its support by a pin and slot connection and on which it may be turned to engaging position without sliding and thereafter receive a sliding motion to back space the carriage,the second member being in the nature of a lever which extends longitudinally at substantially right angles to the sliding movement ofthe pawl carrier and is provided with a cam and an engaging projection, the pawl carrier having a laterally extending projection that overlaps the lever member and is first engaged by the cam thereon to bring about a turning movement of the carrier and is then engaged by the engaging projection on the lever to cause the carrier to receive a sliding movement, a carriage support mounted for case shift movement and carrying said members to shift therewith, a back space key carried by a fixed part of the machine, and intermediate operating connections between said key and lever which permit the latter to be shifted with the carriage support while the key remains at rest, sald connectlons including a link connected at one end to sald lever and pivotally connected at the other end to an actuating device carried by a fixed part of the machine so that said link may swing around said pivotal connection when the carriage is shiftedl with its support.

7. In a typewriting machine, the combination of a carriage support mounted to receive a case shifting movement fore and aft of the machine, a carriage carried thereby to shift therewith, a back spacing rack fixed to said carriage, a slotted sheet metal back spacing pawl carrier, a pin that extends through said slot in said carrier to support it on the carriage support for pivotal and sliding movements and to limit the sliding movements of the carrier in opposite directions, a lever pivoted on the carriage support to shift therewith and provided with a cam and an engaging projection, an engaging member on the carrier with which said cam coacts to turn the carrier without sliding it and with which the engaging projection on the lever afterward engages to slide the carrier, and a link connected at its inner end to said lever and at its outer end pivotally connected to a key actuated member on a fixed portion of the machine, so that the inner end of said link may swing around its pivoted outer end when the carriage and its support receives a case shifting movement and while said' key actuated member remains at rest.

Signed at Syracuse, in the county of Onondaga and State of New York, this 3d day of Jan., A. D. 1921.

HERBERT E. BRIDGWATER.

Witnesses:

MARY K. MORRIS, E. DIoKsoN.

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