US1009391A - Type-writer. - Google Patents

Description

J. W. DUNLAP.

TYPE WRITER.

V APPLICATION FILED JULY 21,1909. 1,U09,391. v Patented N0v.21, 1911.

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' To all whmnit may concern:

TA Y ATENI JOHN w; pimrnryor onIoAeo, 'rnmncirshssrenonor o 'anALr 'ro CLARENCE 0..

w I TRAVIS, or'cnrcneo, mirrors.

mama-m.

- QBe ,ifknown that I, JOHN W. IDUNLAP,

-a citizen 'of the United States, residing at.

Chicago, in the .county of Cook and State of Illinois, ha ve invented certain new and useful Improvements in Type- Writers, of

' which the'following is a specification.

This invention relates to' type-writing 'machines'in. general, but is more especially related to book-typewriters.

The primary to provide an improved construction and arrangementof parts in.the feed mech-' anism'oftypewriters.

Other and further objects will appear in the following specification and be more particularly "pointed out in the appended claims, for which purpose reference may be had to' theiaccompanying drawings showing an exemplification of this invention.

Inthedrawin{gs-Figure 1 is a plan view ofa book-typewriter embodying my invention. Fig. 2 is a side elevation of the same. Fig. 3 is a detail side elevation of the carriage. Fig. 4 is a detail of a portion of the type-bar operating mechanism. Fig. 5

. shows the detail of the'type-barin one printing position. Fig. 6 shows the same in another printing position. Fig. 7 is .a' detail showingthe means of operating the escapement mechanism. Fig. 8 is a perspective view of a portion of the type-bar frame.

Fig. 9 is adetail of a portion of the escape- .such manner as to adapt it to be passed u to "be hereinafterdescribed' and pointedout ment mechanism.

Referring more particularly to the drawings, the bedframe support of the typewriting machine may be of any suitable construction, that shown in the drawings comprising platen 1 surmounted by a track comprising sections 2 and '3, the section '3 of said track being pi'votally connected at t with the section 2. Said track is ro-' vided above with a rack 5 with w ich' .ines'hes' the gear wheels 6', 6, and 7, 7 by which acarria'ge 8 is movablyunounted in and down'the platen at will. This trave ing carriage 8 comprising the end frames 9, 10 is provided above withguide-rods 11 an'd-12, upon which is slidably mounted a type-bar frame 13, of any suitable construction for mounting the type-bar mechanism A Specification of Letters Patent.

means. of. an

Patented Nov. 21,1911.

Application filed. July 21, 1999. I Serial No. soasrv.

in the claims. Preferably, however, this type-bar'frame is made substantially rectangular, as shown' in the drawings, and provided with forwardly extending arms 14:, 15, which slidably engage the guiderod 12, said frame being supported in front by means of bearings provided in the ends of said frame which slidabl'y engage the rod 11. The type-bar mechanism maybe supported uponthe frame 13 in any suitable ject of this nvention ismanner, but according. to the preferred means, asexempli ed in thedrawings, such support comprises the arcuate racks or frames 16, 17 rigidly connected-together by lar end supports one {of which, '33,is clearly shown in Fig. 8, said endsupportsbeing provided with rigid jectlons 35, 36, slldably en i in slots 87, 38? within each end of the type b'ar frame 13. By this means the type-barmechanism is adapted .to be shifted upwardly and rearwardly in the type-bar frame. Slidably engaging the lower. pin or projection 36 is a shift lever 39, which is pivoted intermediately of-its ends at 4Q and provided at one end with aslot 11 by means of which it slidably engages said pin 36. The racks are provided w1th radially disposed slots 18, 19,'which radiate from the printing point. Within the slots 18 of the arcuate support 16 are oscillatably pivoted a plurality of type bars 20, each of said type bars comprising a shank portion and an 1ntegralhead 21 angularly disposed relatively thereto; The head 21 is provided with j facets 22 and-23 whereon may be mounted 5 the-usual upper and lowercase characters. Z'lhe inner end of type-bar 20 is pivotally mounted within one of the slots 18 in the arcuate 'bar16, and is rovided with a pinion conoentricwith its pivot and' rigid therewith, said pinion inthe referred em-I bodiment exemplified, consisting of an integral portion of said bar having gear teeth provideddn the periphery of a portion ex tending concentrically'around the 'pivot. v

contemplated by the present invention, the type-barbperating mechanism comprises any suitable key mechanism,

which directly engages the type bars, said key mechanism-according to the exemplification shown on-the drawings consisting of a plurality of hey-levers 26 whichfare 2 t aps-c 391 preferably pivoted respectively intermediately of their ends within the slots 19 of the arcuate rack-l7. Upon the outer end of each of said key levers is rigidly mount ed the usual. finger-pad 27., while'on the inner end suitable means for operably en gaging thetootlied end 28 of the type-bar 20' 1s provided. In the present embodiment this means consists of an arcuate rack 29 forming an integral portion of the key lever 26. As shown in Fig. 4 of the drawings,

the key lever 26 is' maintained normally raised by means of a resilient member or spring'3O securedat one end to a rigid portion of the type-bar frame, and at the other end to the arcuate rackendof said key lever' 26.- The normal position of the key levers" is thus that'position shown'in Fig. 4, and in full lines in Figs. 2 and 3.

, In order to provid'e suitable means of improved construction for efi'ecting a direct connection between the keybar and the spacing mechanism, each of said key bars 20 is provided adjacently to its pivoted ends with anintegral lug 32. Swingingly mounted in the type-bar frame 13 is a universal spacing bar 42 which may be of any suitable'construction, but according to the preferred embodiment shown in the 'drawings, is made arcuate in form to conform to the inner arcuate rack 16 within which the typevbars are pivotally mounted.

, Said spacing lever is by this means adapted to be impinged directly by the lug 32 of each type-bar 20 when said type-bar descends into printing position. It will thus be seen that the spacing lever is actuated by direct impingement of the type-bar. Slidably engaging the spacing lever below is a roller 43, or other friction-reducing device mounted on the extremity of an escapement lever arm 44, which is rigidly secured at one end to a pintle 47 carrying a shorter lever arm 47 upon which inturn are mounted dogs 45, 46 of well known construction, seen best in Figs, 7" and 9 of ;the drawings. The dogs 45, 46 are moved into and out of engagement with a rack 48 rigid on the carriage 8 by the movement of the escapement the type character 25 is brought into print ing position, the other type character 24,'by

reason of its relative angular disposition with reference to the character 25 being maintained out of contact with the paper or platen. As the type-bar 20 is being moved. into the position shown in dotted v lines, it will be seen that the lug 32 will impinge' directly upon the spacing bar 42,

whereupon sa d spacing ,bar'oscillates the es.-

capement lever 44 to move the movable dog 45 ina well known manner out of engagement with the-rack 48, whereupon the movable dog 45', under fth'ejaction of the spring 49, moves end-wise a'pproximately the distance of one toot-h the rack, so that as the type-bar 20 is raised by the. action of spring 30 upon the key lever 26, the rigid dog 46 is moved'out of engagement .wlth one rack tooth while the movable dog is moved into engagement withthe next rack tooth, thus permitting the escapement of one to'otlnof the rack. In order to bring the printing character 24 into printing position, as shown in Fig. 6 of thedrawings, the

shift lever 39 is depressed, whereupon the type-bar rack 16 is raised in such manner as to cause the type-bar 20 to swing about its center at a-difierent-distance above the platen when the key lever '26 isdepressed.

It will thus be seen that: the type-bar 2 0 isoscillatable about a "moving-center by means of the pivoted lever 26 which enters into direct engagement therewith. I

Mounted upon the lower portion of the carriage 8 is a ribbon shifting device 50, which may be operated in any suitable manher to move the ribbon into and out of printing position. Inasmuch, however, as this mechanism has no particular bearing upon" the present invention, a detailed description thereof is not included in this; specification. ,In like manner. the detailed construction of the platen, including the means for holding the printed surface does not form any part of the present invention,

and has not, therefore, been described in detail.

What I claim is:

1. In a book typewriter, the combination with a pintle, of lever arms. of unequal length mounted on said pintle, a feed dog mounted on the shorter lever arm, a universal bar movably engaging. the extremities of the longer lever arm. and a type bar adapted to impinge said universal bar. I

2. In a typewriter, the combination with a universal bar and a plurality of type bars arranged to impingeupon said universal bar when they are actuated, a pintle, a lever mounted on. said pintle below said universal bar. a roller on one end of said lever in rolling contact with said universal bar, and a feed dog carried by said pintle.

3. Ina book typewriter, the combination with a feed escapement mechanismcomprising a pivotally' mounted feed dog, an escapement lever rigidly connected to said .dog and of relative great length compared to the distance of said dog from its axis of oscillation, said lever being provided with friction reduclng means on the outer swinging end thereof, a universal lever operatively engaging said means, and a type-bar impinging said universal lever 4; In a book typewriter, the combination 5 with a feed escapement mechanism com rising pivotally mounted feed do s, a ever connected to and oscillat-able wit said feed dogs, said lever being of relative great length'in comparison-to the distance of the 10 feed dogs from the axis of oscillation, a pivotally mounted universal lever movably engaging said oscillating lever, and a typebar adapted to impinge directly upon said universal lever.

. In testimony whereof I have signed my 15 name to this specification, in the presence of two subscribing witnesses, on this 15th day of July A. D. 1909.

. JOHN W. DUNLAP. lVitnesses ARTHUR A. KNIGHT, M. V. CANTWELL.

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