US1883698A - Typewriting machine - Google Patents

Description

Oct. 18, 1932. G. a. some TYPEWRITING MACHINE 5 Sheets-Sheet Filed Jung 1. 1929 WITNESSES Oct. 18, 1932. GQ|NG TYPEWRITING: MACHINE Filed June 1, 1929 3 Sheets-Sheet 2 lNVENTOR 44. a. 2,4 BY did/.1; mQlw 1 NESSES ATTORNEY 18, 1 G. acoms TYPEWRITING MACHINE Filed June 1, 1929 5 Sheets-Sheet 3 W M i Z ATTORNEY 4 WITNESSES Patented Oct 18, 1932 UNITED STATES:

PATENT OFFICE GEORGE G. GOING, OF STAMFORD, CONNECTICUT, ASSIGNOR TO REMINGTON TYPEWRITER COMPANY, OF ILION, NEW YORK, A CORPORATION NEW YORK TYPEWRITING v IllI. AGIHIIN IIJ Application'filed June 1, 1929. Serial No. 367,733.

My invention relates to typewri'ting machines, and more particularly to improved means for effecting an adjustment of the carriage support in order to vary the position ofthe face of the platen to and from the printing faces of thetype when the latterare in printing position and thereby vary the effectiveness of the imprint.

The main object of my invention, generally stated, is to provide simple and efiective means of the character specified for effecting such adjustment and for carrying with the adjusted carriage support various parts of the typewriting machine so that the correlation and effectiveness thereof'one on another may be maintained and in no manner disturbed by such adjustment.

A further object of my invention is to so construct and arrange the parts that they may be confined within a comparatively small spaceas required in a small, portable typewriting machine, without interfering with the effectiveness and stability of the parts. a Y i To the above and other ends which will hereinafter appear, my invention consists in the features of construction arran 'ements of V 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 designate corresponding parts in the various viewsa Fig. l'is an enlarged, detail, fragmentary side elevation showing a portion of the ma chine, with parts broken away.

Fig. 2 is a detail, fragmentary, bottom plan view showing the rear portion of the machine? i Fig. 3 is a detail, fragmentary, View taken from the inner side of one of the side plates of the frame and showing the means by Which the rear supporting casting is adjusted fore and aft of the machine on the side plates.

Fig. 4 is a detail, skeletonized, perspective view of the line lock mechanism and some of the associated parts. I

' I have shown my invention, in the present instance, embodied in a front stroke, noise less, portable typewriting machine of the the frame. ing is connected to the side plates of the acter of typewriting and like machine, but

may be employed in such machines gener-' ally, wherever found available;

In addition to my said application Serial No. 331,534 various features of the said noiseless portable machine referred to are disclosed in the following applications filed by j Serial No. 363,757, filed May 17th, 1929; Serial N 0. 364,038, filed May'l8th, 1929; Serial No. 365,426, filed May 23rd, 1929; Serial No. 365,885, filed May 25th, 1929; Serial No. 366,- 623, filed May 28th, 1929.- 1

In the accompanying drawings I have shown only so much of the typewriting machine as is necessary to arrive at an understanding of my invention in its embodiment therein; r

Theframe of the machine comprises side plates 1 united by several members or'castings, one of which, indicated as a whole by of the machine and constitutes the back of The means by which this castframe afford a bodily adjustment of the casting on said side plates fore and aft of the machine. Any suitable means may be employed for this purpose. In the present inthe reference numeral 2, is located at the rear I stance each side plate 1 is slotted horizontally at three places, as indicated at 3. The stem of a headedscrew 4 passes through each slot 3 and is received in a tapped opening in'the casting 2. This provides a three point bearing or connection for the casting on each of the side plates. Whenthe screws 4 are backed up the casting 2 together with the various parts carried thereby may be adj us't ed fore and aft of the machine. When the screws 4 are tightened a clamping engagement between the casting, the heads of the screws and the side plates is effected, thus firmly holding the casting 2 in its usted position.

I In order to efiect an adjustment of the fcasting'2 I provide a vertically elongated slot ,5 in each side plate 1. an eccentric 6 is seated in each slot 5, each of said eccentrics being provided wit-ha hexagonal head 7 to facilitate a rotative-adjustment thereof. An eccentrically arranged opening extends through each member 6-7 for the free passage therethrough of the stem of a headed screw 8. The stem of each screw 8 is received in a tapped opening in the casting 2. When the screws 8 are backed up a turning of the eccentrics 6-7 will efi'ect an adjustment of the casting 2 either forward or backward depending on the direction in which said eccentrics are turned. Vfhen the desired adjustment is obtained the screws 8 and 4 are tightened, thus securing the casting 2 in its adjusted position.

From what has been said it is obvious that an adjustment of the casting 2 in the manner described will effect a corresponding fore and aft adjustment of the cylindrical platen 9 relatively to the printing face of a front strike t e bar a when the latter is in the rintin l 22 position, indicated in dotted lines in Fig. 1; 1t being understood that the carriage and the platen 9 carried thereby are supported by the casting 2, as wlll hereinafter more clearly appear.

I will now describe how the carriage and various other parts of the machine are supported by and adjustable with the casting.

A rock shaft 10 extends from side-to-side of the machine and is supported at its ends on adjusted to vary the force exerted thereby on the case shifting parts.

Secured to the rock shaft 10 are forwardly.

extending parallel arms each pivoted, at 16, to a depending bracket arm 17 on a case shift frame or carriage support, designated as a whole by the reference numeral 18. V This carriage support is formed with oppositely disposed grooved raceways that receive crossed anti-friction rollers 20 that are likewise received in oppositely disposed grooved raceways 21 in a cross bar 22 of the carriage. End plates 23 for the carriage are secured to the cross bar 22 and are provided with bear-' ings for the shaft of the platen 9 to support the latter on the carriage.

In addition to supporting the carriage in the manner described on the carriage support 18 I provide a direct support for the carriage on the casting 2, as disclosed in my above mentioned application Serial No. 3 5,- 126. To attain this end I extend the casting 2 up in the rear of the platen and near the center of the machine, as indicated at 2="- and secure to a front inclined face 2d thereon a guide plate 25 that has a central upright slot therein. A cross bar 26 extends from side-toside of the carriage and is secured at its ends by screws 2? and nuts 28 to tne end plates 23 of the carriage. The rear edge of this bar bears against the guide plate 25 and guides and supports the carriage in the rear of the printing point and resists the pressure exerted on the platen by the type bars. It will be understood that the bar 26 has an up and down sliding movement on the front face of the guide plate 25 during the corresponding case shifting movements of the carriage and the carriage support on which it is mounted, whereas in the travel of the carriage said bar moves longitudinally over the face of the guide plate. I have provided means, shown in dotted lines in Fig. 1, for effectively holding the carriage from being displaced forward off the guide plate 25 without, however, interfering with the'case shifting movements and the travel of the carriage described above. This construction is fully disclosed in my hereinbefore mentioned application Serial No. 365,426, and I do not deem it necessary to describe it in detail herein.

Among other devices carried by and adj ustable fore and aft of the machine with the casting 2 are the following:

The carriage escapement mechanism.

The spring drum for advancing the carriage.

Back spacing devices for effecting a stepby-step back spacing'of the carriage.

Means for controlling the carriage escapement mechanism.

Line lock and margin stop mechanism.

Case shift stops for limiting the movement of the case shift frame.

Bill. of said instrun entalities are supported, wholly or in the main, either by the carriage support ll or directly by the casting 2 so as to be adjusted bodily with the latter without changing the correlation between the parts thus carried and the companion parts with which they are associated and coact.

I will now describe these various dev es and the manner in which they are morn; and operate.

A spring drum 29 is mounted for turning 11 ovement on the undersidoof the carriage support 18. Cne end of a cord 30 is attached to the drum, said cord passing over a puile 3i on the carriage support and ttached at its opposite end to the carriage. An anchor pawl 32 is pivoted on the carriage support and coact-s w1th a ratchet-wheel fixes O0 to a windin arbor of the strin in the drum '29 to control the tension of said spring.

pending bracket arms 38 secured to the end plates 23 of the carriage. A finger piece69 is provided at the end of an arm secured to the feed rack 36 in order to turn the feed rack on its pivots 37 into and out of'en gagement with the feed pinion 34.

Fixedly connected with the feed pinion 34 and arranged below the carriage support 15 an escapement wheel 41. Feed dogs 42 and 43 coact with the escapement wheel to permit a step-by-step advance movement of the carriage. These feed dogs are carried by a dog rocker 44 adapted to rock on pivot screws 45 carried by a bracket 46 secured to the carriage support. Motion is transmitted to the dog rocker by anadjustable screw contact 47 carried by an ear 48 on an angular or bell crank lever 49. This lever is pivoted at 50 on the bracket 46 and has a depending arm 51 pivotally connected to a link 52. The forward endof this link is pivoted to a dependingarm 53 of a yoke-like universal bar, designated as a whole by the reference numeral 54. The parallel side arms of the universal bar are pivoted at 55 to a bracket arm 56 carried by a fixed part of the machlne; 1n the present instance the type bar segment 57.

The line lock mechanism comprises an up'- right lever 58 of the first order. This lever is pivoted at 59 on a rock shaft 60 which is supported to turn in bearings in the casting 2-2 The outer end of the rock shaft 60 has a crank arm 61 fixed thereto and to this crankarm'is pivoted a link 62 that extends to-the front of the machine where it is connected to key controlled bell crank 62 for shifting said link 62 fore and aft of the machine and rocking the shaft 60, a spring 62 returning the link 62, rock shaft 6(),and lever 58 to normal position.

In the normalposition of the parts the upper end of the lever 58 extends into the'path ofva line lock stop or abutment 63 carried by and adjustable to different set positions along a bar 64 that extends throughout the length of the carriage and is fixed at its ends thereto. The lower end of lever 58 is bifurcated at 65 tostraddle the rear end of the horizontally disposed line lock lever 66 pivotally supported a at 67 on a forwardly extending arm 68 (see Fig. 2) of the casting 2. The forward end of the line locking lever 66 is adapted to move into the pathof an ear 69 projecting rearward from and centrally of the universal bar and block its operat ng movement, saidlever 66 being turned to its releasing. positionloj a spring 66*. 7

From a consideration of Fig. 1 it will be seen that the universal bar 54 is actuated by: the heel of each type bar as the latter approaches the printing position. Therefore, it will be understood that when this universal bar is looked, as pointedout above, all of the type bars will be prevented from reaching the printing position.

Should the operator desire to write one or more characters afterthe line lock mechanism.

is actuated, in order'to complete a word or add a hyphen, a depression, of the margin or line lock release key 62 is effective to actuate the link 62 and rock the shaft 60. The efiect of this is to clear the upper end of the lever 58 from the path of the stop 63, thereby allowing the lever 58 to return to normal position and afford. a movement of the line lock lever 66, under the force of its spring 66*, to disengage the ear 69 on the universal bar 54 and free the latter, enabling a further printing operation to be effected. a

From what hasbeen pointed out it will be seen that the line look meehanismpinclu'ding the parts 66, 58, 60 etc., receives its support on the casting 2 and is adjustable fore and aft of the machine'therewith.

The escapement mechanism for the carriage may, for the purpose of the present invention,

be controlled from the space key by any suit- 7 able means. I have devised for use in this machine a separate train of connections from the space key to the universal bar 54 which connections are automatically broken, when the line lock is actuated. It may be mentioned at this point that such mechanism doesnot interfere with the fore and aft adjustment of the casting 2 for the purposes set forth above;

But, since a disclosure of such mechanism is unnecessary for arriving at an understanding of the present invention, and as such mechanism is claimed in aseparate application filed by me June 5th, 1929, Serial No. 368,539, fur ther reference thereto will not be made herein,

. I have provided in the present construction a back-spacing mechanism carried in themain bythe carriage support 18 and comprising a back-spacing pawl 7 0 which engages directly the teeth of theline spacing wheel 41 and turns it step-by-step in thereverse direction. This results inefiiecting a corresponding turning of-the feed pinion 34 and in moving the carriage to the right through the feed rack 36.

guided on the bracket arm 73 and by the pin -7 2,;so: that an actuating movement of the pawl to theiright, as the parts appear in" Fig. 2, will cause the pawl to engage the escapement wheel and turn the latter a letter space distance in the reverse direction. A spring 74 is connected at one end to the pawl carrying member and at its opposite end to :81 secured to the bottom of the carriage support 18. A forwardly extending link 82 is pivoted at its rear end to the other arm of the lever 7 9, the forward end of the link 82 being controlled from a key actuated angular lever (not shown) at the front of the machine, and corresponding to'the lever 62 at the other side of the machine.

I have hereinbefore pointed out how the carriage support is supported and guided by the casting 2 for case shifting movement thereon and for adjustment, together with the parts carried thereby, fore and aft of the machine with said casting. Any suitable means may be employed for effecting such case shifting movements of the carriage support and the parts carried thereby, such for example as those disclosed in my application Serial No. 366,623 filed May 28th, 1929 (now Patent No. 1,767,878).

The stops employed in the present instance for limiting the case shifting movements of the carriage support are like those disclosed in said last mentioned application, and comprise two stops each designated as a whole by the reference numeral 83 secured by screws 84 to the casting 2. Each of these stops comprises a metal plate 85 with a layer of felt 86 faced with a very thin metal strip 87 that constitutes the contact face with which the carriage support 18 engages to noiselessly limit the upward case shifting movements of the parts. Adjustable screw stops 88 are threaded into tapped openings in brackets 89 secured to the side plates 1 of the frame and bearing on the forwardly extending arms 90 of the casting 2.

From the foregoing description it will be seen that I have supported all parts of the machine that ordinarily would be affected by or would interfere with an adjustment of the carriage support fore and aft of the machine, either directly on the casting 2 or on the carriage support 18 supported thereby, to partake in such fore and aft adjustment without destroying or affecting the correlation or effectiveness of the parts. This applies to the escapement mechanism, the back space mechanism, the line lock mechanism, the case shift frame and stops therefor, and the spring drum for the carriage etc.

It also will be seen that I have provided comparatively simple, light, inexpensive and compact mechanisms which lend themselves to embodiment in a small compact portable typewriting machine; that simple and efto give a pressure imprint and a limited eX-f tent of movement of the type bars as the associated toggle members reach approximately a straightened condition, as shown in dotted lines in Fig. 1.

Various changes may be made in the construction, and parts thereof may be employed without others, without departing from my invention as it is defined in the accompanying claims.

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

1. In a front stroke typewriting machine, the combination of a carriage, a platen carried thereby, a support for the carriage mounted for up and down case shifting movements, back spacing means carried by the carriage support, asingle member on which said carriage support is mounted and by which the side plates of the frame of the machine are firmly united, and means for effecting an adjustment of said member together wich the parts carried thereby fore and aft of the machine and for holding said member in its adjusted position, whereby the platen may be adjusted to-vary the effectiveness of the imprint from the types without disturbing the correlation between various parts carried by and adjustable with said adjustable member.

2. In a front stroke typewriting machine, the combination of a carriage, a platen carried thereby, a support for the carriage mounted for up and down case shifting movements, back spacing means carried by the carriage support, a single member on which said carriage support is mounted and which firmly unites the'side plates of the frame of the machine and constitutes the back thereof, means for efiecting an adjustment of said member together with the parts carried thereby fore and aft of the machine and for holding said member in its adjusted position, whereby the platen may be adjusted to vary the effectiveness of the imprint from the types without disturbing the correlation between various parts carried by and adjustable with said adjustable member, and key actuated means carried by a fixed part of the machine and operative for actuating said back spacing means without interfering with the adjustment of said adjustable member.

8. In a front'stroke typewriting machine,

the combination of a carriage, a platen carried thereby, a support for the carriage, case shift supporting arms for said carriage support, a rock shaft on which said arms are fixed, a counter balance spring connected to said rock shaft, case shift stops, a single member that extends from side-to-side of the machine and which firmly unites the side plates of the frame thereof and on which said rock shaft, counter balance spring and case shift stops are mounted, and means for efiecting an adjustment of said member together with the parts carried thereby fore and aft of the machine and for holding said member in its adjusted position, whereby the platen may be adjusted to vary the effectiveness of the imprint from the types without disturbing the correlation between the Various parts carried by and adjustable with said adjustable member. 4:. The combination of a carriage; a platen carried thereby; a support for the carriage; a machine frame comprising side plates and a member which unites said side plates and constitutes the back of the frame and supports said carriage support; and means for efiecting an adjustment of said member fore and aft of the machinerelatively to said side plates and for holding the member in its adjusted position, whereby the platen may be adjusted to Vary the effectiveness of the imprint from the types without disturbing the correlation between various parts carried by and adjustable with said adjustable member.

5. The combination of a carriage ;'.a platen carried thereby; a machine frame compris- 1 ing side plates and a casting which unites said side plates at the rear thereof and con- 40 stitutes the back of the frame; means for supporting and guiding the carriage support for case shifting movement on said casting; case shift stops on said casting; and means for adjusting said casting fore as and aft of the machine relatively to said side plates and for holding the casting in its adjusted position, whereby the platen may be adjusted to Vary the effectiveness of the imprint from the types without disturbing the correlation between the Various parts carried by and adjustable with said adjustable casting.

Signed at Stamford, in the countyof Fairfield and State of Connecticut, this 31st day of May, A. D. 1929.

GEORGE G. GOING.

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