US935987A - Type-bar construction for type-writers. - Google Patents

Description

0. W. HOWELL, JB. TYPE BAR CONSTRUCTION FOR TYPE WRITERS.

APPLICATION FILED DEO.26,1901.

Patented Oct. 5, 1909.

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WITNESSES:

- matter from the The action which movement is imparted ings, in which- UNITED STATES.

PATENT OFFICE.

CHARLES W. HOWELL, :JR., OF NEWARK, NEW JERSEY, sQSSIGNOR, BY MESNE ASSIGN- MENTS, TO UNDERWOOD 'TYBEWBITER COMPANY, OF NEW YORK, N.- Y., A COR- PORATION OF NEW JERSEY.

Titre-BAR CONSTRUCTION 56103- 1rYrs'-wnri"nns.-

Patented Oct. 5, 1909.

Application filed December 26,1901. Seiia1'No.'87,193.

To all whom it may concern:

Be it known that I, CHARLES W. Hownnn, J r., a citizen of the United States, and a resident of Newark, in the county of Essex and State of New Jersey, have invented a new and Improved Type-BarConstrugtion for TypeJVriters, of which the folloyqingis a full, clear, and exact description. 1

My invention relates to typewriters, and

more particularly to the type bars and to the means for supporting the s,ame, '-and has for its object to provide-a constriction by means of which the entrance and alzeumnlation of dirt at the pivot of thc type bar and in the slot ofthetypetbersnppor will-be rendered practically impossible. To this end, I have given 'the type bar-supp rt an improved construction whieh'protectsi tagainst the entrance of foreign matter, an I have also given the type bar itself a pee; liar eonstruetion by which it is enabled'to act as a wiper or ejector for, removing-any fore' n guiding slot at thc ltype a ar wpport. A

Three s cific embodiments of n' y inven. tion are s own in the accompanyit't Figure l is asectional elevationbf so much .of a typewriter as is required to illustrate .my invention. Fig. 2 is a similar-view show ing only the type bar support and the type 1 bar pro er,-in a slightly different arrangement; 1' ig. 3 is a like view showings further-construetiomand Fig. axis a rearelevation of th e segment which supports the ype't -r -'where A is the key lever carrying the key A, and fulcrumed at A -upon a suitable part of the framing. B is a spring which restores the key lever to its normal upper position? G a lever mounted to swingon its fulcrum located upon the framing of the machine as.indicatedat C andfthis lever is- .pivotally connected at G with an elbow .link D, the ends of which are connected respe'ctively as at,D, D? with the key lever A and with the actuating link I connected at I with the type bar E. The connection at I. ate the-'eenteror pivot E of the type:

' of -the type bars move.

- upper-surface of the support.

bar E, said pivot E being formed by a rod or wireextending through the support or segment 'F,'which is vertically disposed and curved. G is the sup rt or cushion against which the .type bars 1%) rest in their inactive position. The support F is provided with a series of slots IF, in-which the pivot ends J. indicates the type bar guide which is located at the top of the support or segment F and"exten ds adjacent to the printing point which isithat point where the ,typeis adapted to strike- ,against the platen K. "In the construction 0 the segment, or support as generally em vployed hitherto, slots corresponding to those lettered F in the drawings extend through to the top face of the support and are therefore open to the entrance of dust and other foreign matter. To avoid thisobjectionable feature I improve the construction of the support by covering the upper end of these slots or guides F, or, in other words, by having these slots terminate short of the obvious that with this construction no foreign matter can enter the slots F from \above. The upper surface of the bottom ledge or rib of the support F may either be horizontal as at in Fig. 2, or it may 'be arranged to slope downwardly toward the free-edge of the support as indicated at fin l and 3. In the former casefthere is still some danger of foreign matter ac- It will be i cumlilating upon the horizontal upper face of the'ledge or rib F and dropplng from however, the upper surface of the ledge or rib 3 is incli ed as in Fig. 1, any foreign matter whieh',' ay :fall upon it will slide off. This result-is further insured by the segmental formation of the rib as will:be evident froni '=Fig. 4., If an additional amount time to time upon the type bar. -When,

of protection is desired, I may .close even the forward ends of the slots F, for instance, by means-of a cover plate or dust shield H, such shown i i-Fig. 3. The dust-shield or'eover plate covers the plvsegment construction 'hereinbefore described ots of thetype bars against the entrance of guide slots-F.'. I further improve the construction by forming the type bar with a the construction illustrated by cover plate or'auxiliary dust shield II, lie I desire to type-bar support projects far enough to enwiper or ejector, the otlice of which is to automatically remove from the slot F at each operation of the type bar any dust or other'inatter which may have found its way to it. For this purpose I produce a deep notch E in the type bar between the body or shank E thereof and the pivot portion E3 and form the type bar with a projection which constitutes the wiper or ejector. T he length of this ejector is such that it will with its point reach practically to the front end of the slot F when the type bar swings back to its normal position. is required to enable the type bar to swing into its active position without exposing the edge E, and without colliding with the rib or dust-shield F the construction shown in Fig. 3. Whenthe type bar is in the print-- ing position the rib or dust-shield F and in Fig. 3, the

within the recess or notch I. add that in the usual construct on of front strike typewriting machines, various parts otshown in the drawing, such as cylinder scales and paper guides, operate to prevent the falling of dust or other foreign matter behind the segment F, so that practically all the dust, grit and fragments of paper an rubber eraser, fall down segment- The ejector forms part of the pivot portion E of the type bar, and it will be seen by reference to Figs. 1, 2 and 3 that the bottom ledge or rib of the segment or tirely cover the path of the pivot portion, so that not even the point of the ejector E ever projects beyond the vertical plane passing through the forward end of said ledge -or rib.

. I desire it to be understood that thcforins of construction-shown and described herein are not the only ones which may be used in carrying out my invention, but rather they constitute only examples into the I The notch E i (in each of the structures shown) and-with the cover plate or auxiliary dust-shield H in "bars pivoted to work in segment, and a dust shield covering the in front of the of the varioustorms, in which my invention may lie-carried out.

I claim. as my invention and desire to secure by Letters Patent:

1. A type bar support provided with a series of guide slots for the reception ot' the type bars, and having a portion covering the upper portions of said slots on the side adjacent to the paths of the type bars, and a cover plate extending downward from the said portion to close the ends of the slots between the pivots ofthe type bars and the v paths of the type bars.

2. The combination with a support having slots and a cover plate extending over the ends of-said slots, of type bars pivoted in said slots and comprising shanks adapted to extend adjacent to said COVQY'Pl'fliLB, the said. shanks being separated from the pivot portions of the type bars to allow the latter to swing into active position without colliding with the cover plate, each type bar being formed at the free end of its pivot portion with a wiper or ejector arranged to remove any foreign matter that may lodge in the respective slots.

3. In a front-strike typewriting machine,

the combination of a vertically disposed curvedand slotted segment, a series of typethe slots of said pivots of said type-bars and mounted adjacent to and bearing directly on the slotted portion of said segment.

l. In a front-strike typewriting'machine,

the combination of the vertically disposed slotted segment, a series of type-bars pivoted to work in the slots. of said segment, and a dust-shield or cover-plate bearing directly on the slotted-portion of the segment and closing the ends of the slots.

The combination in a front strike writing inacl1ine,'of'a segment arranged in front and below the printing point, a forwardly projecting flange on the segment, and- ,a series of type bars hung under the flange, the bars being cut away to clear the said flange when at the printing point. I

In Witness whereof I have hereunto set my hand and seal in the presenceoftwo sub-.

W. HOWELL, JR.-

scribing witnesses.

CHARLES Witnesses:

EUGENE Earn, JOHN Lorna.

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