US938439A - Type-writing machine. - Google Patents

Description

J. B. SEGOR.

' TYPE WRITING MACHINE. APPLICATION FILED JULY 28, 1%508.

Patented Oct. 26, 1909.

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; writing machines, and more sra'r s PATENT OFFICE. I

JEROME B. SECOR,

To all whom it may concern:

Be it known that I, JEROME B. Sncou', a citizen of the United States, and resident Derby, in'the county of New Haven and State of -.;onnecticut, have invented certain and useful Improvements in TypelYriting Machines, of which the followingi is a specification.

My invention relates in general to typeparticularly to an improved device for bringing the type into proper printing position.

u my prior patent No. 786,056, granted March 28th, 1905, I have shown anddescribed a type alining device in the form of a spherical or aco'rn shaped pin secured in a stationary member, which is adapted to engage in a curved perforation in each type-bar. Thesaid patent also covers, under its broad terms, the use of a pin on each type-bar and a perforation in the stationary member. A specific form of pin on each type-bar, in combination with a perforation in the stationary member, forms the subject matter of my present improvement-in the alining device. In front strike machines such as that known as the Secor machine, the type-bars are disposed with their pivots substantially in the arc of a circle and their axes projecting forward substantially horizontally. By reason of this arrangement the type-bar in the middle moves in a vertical plane passing through the printing point, whereas type-bars farther from the middle have movements in planes which become more nearly'horizontal as their distance from the middle increases. Each typear shown in my said prior patent is provided with a curved perforation which conforms with the arc of a circle in the plane of its movement, having its center at the It is stated in my said prior patent that the location of the perforations and the pin. could be trans- Specification of Letters Patent. Application filed. July 28, 1908.

OF DERBY, CONNECTICUT.

TYPE-WRITIN G MACHINE. i

Serial No. 445,700.

below the horizontal, in the usual form of machine, since the type-bars are pivoted in an are below the horizontal less than a semi circle. For however, the perforation would of course in practice he made double flaring throughout its entire circumference. Accordingly the use of the term double flaring will be understood to mean double flaring either throughout the entire circumference or only through a portion of its circumference. The diameter of the. pin should equal the smallest diameter of the perforation. WVith this construction a better engagement perforation is obtained for difierentthicknesses of paper, since the engagement is constant after the full diameter of the pin has reached the small diameter of the double flaring perforation which is equal to the diameter of the pin and which is in the middle Patented Oct. 26, 1909. I

convenience of manufacture,

of the pinand of the perforation. By reason of-the. cylinness of paper on the strikes when the pin is midway between the point where ,rits full diameter first engages the smaller diameter of the perforation and the limit of its inward movement.

My invention is applicable to numerous forms of typewriting machines, but may perhaps be best illustrated as embodied in a front strike machine such for instance as the Secor machine. Accordingly to enable those skilled in the art my invention, I have shown by Way of example in the accompanying drawings and shall describe with reference thereto embodiments of my invention applied to a Secor machine.

In said drawings Figure 1 is a side elevaposed, that is, with a perforation in the stationary member and a rounded or acorn shaped pin on each .ype-bar.

In accordance with my present invention, I employ a cylindrical pin on the type-bar. curved in the arc of a circle about the typebar pivot, in combination with a double flaring perforation in the stationary member, 2'. 6. corresponding with the total space occupied by the several curved cylindrical pins tion of the h y-bar and type-bar movements with my .i'nproved alining device applied thereto. Fig. 2 is an enlarged detail elevation of the type-bar movement provided with my im, roved alining device. Fig. 3 is a further enlarged elevation of the alining flarin perforation. I p e erring now more specifically to said drawings, 10 indicates a key-bar suitably fulwhen the type-bars are in striking) position. The perforation need only be dou le flarlng a bifurcated link 11 with a differential be ment being such that with the average thick- I platen, the type-bar I to understand and practice pin and bushing provided with the double crumed atits inner end and connected as'bfi abled to continue its motion beyondthe point P crank lever 12. Said bell crank lever pulls 'the U-shaped link 13 against the tension of and thus operates the type-. bar 15 which is'piv'oted at 16 in the hangers The U-' return spring 14 to the arc of a circle-1n the plane of movement of the type-bar with its-center atthe' type-bar ivot.

19 is a will be remembered that the frisket is U- shaped i-n theySecor i'nachine. Mounted-in tlie frisket guide 19 near the upper portion is a hardened bushing 21 which is provided with a double flaring perforation as described above and Theplaten is shown'in dotted linesv in l -igs'. 1 and '2. v

I have. described only one key -bar and t ype-har movement, but of course itis understood that the machine has a full set of these members and thekey-bars normally rest horizontally with their pivotssubstantially in the are of a circle with the .alinement perforation as center. \Vhen the key-bar is depressed the type-bar is thrown backward into striking position, the curved cylindrical a'lining pin,

with the bar, passing into the double flaring crloration. By reason of the peculiar form of the alining pin 18 and the perforation in the bushing zl, the engagement of these two members is the same for the otuside typethe small diameter trisket guide and2t) the'frisket. It

clearly shown in- Fi which is preferably integral bars" as for the inner type-bars, and dur'n'g the movement ofthe type-bar from A the'full diameter of the 'in'has firstreached its limit" of rately fixed. If the pin 18 had theacorn or sv herical shape described in my. prior patent, t e aline'ment would be just as good at the the-time of t evperiorationuntll, x'novement,the aiming s accuarticular moment when the line of the.

argestdiameter of the pin engages the line of thesmallest diameter of the perforation, but there would not be.the possibility of such accurate valinement for different thicknesses of paper pin the form herein set forth. I claim I 1. An alining devicefor typewriting maf chines, comprisingin combination a station,-

as is accomplished by giving to the H ary member provided'with a double flaring perforation, and a curved cylindrical pin on the type-bar disposed in an arch the plane of movement w'th the center at the type-bar pivot and adapi tion of said stationary member.

2. In atypewriting machine, tion with aplurality of substantially horied to engage in the p'erfora:

the combine; l p

'zontallly disposed type-bars having their piv-f ots substantlally. in the are of a circle andQa" curved cylindrical alining pin on eachtypebar in an arc in the plane of movement wi its center at' thetype-bar plvot; of a stationary memberprovided with a double flaring perforation in the center of the arc of the type-bar pivots and in a common portion of the pathsof all of said alining pins.

Witnesses: I

G. A. ALLINGHAM, M. A. KUP1'Ek.

JEROME B. si icon. p

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