US1739739A - Typewriting machine - Google Patents

Description

Dec. 17, 1929.

J. A. B. SMITH TYPEWRITING MACHINE Filed Aug. 25. 1927 Patented Dec. 17, 1929 NTD STATES PATENT oFF-ice JESSE A. B. SMITH, 0F STAIVIFORD, CONNECTTCUT, ASSIGNOR TO UNDERWOOD' ELLIOTT FISHER COMPANY, OF NEW YORK, N. Y., A CORPORATON .OF DELAWARE TYPEWRITING MACHINE Application led August 25, 1927. Serial No. 215,338.

This invention relates generally to continuous billing typewriting machines of the type disclosed in the patent to Wernery & Smith, No. 1,132,055, dated March 16, 1915, and more particularly to such a machine equipped with two carbon-carriers movable along the same track, one above the other, as disclosed in the patent to George W. Rentz, No. 1,503,064, dated July 29, 1924.

In typewriting machines employing two carbon-carriers, one superposed above the other and each holding carbons tor a separate work-web, it is usual to turn back the leading end ot the work-web not being typed, over the top ot its usual carbon-blades, and let the web ride idly up and back as the other workweb is being typed. Y

In carrying out the present invention, provision is made ot' two carbon-carriers, one disposed above the other. Both are movable toward and from the platen together along the same track, and each holds carbons interleaved between the plies of a multiple-ply work-web. A clamp is mounted on each carbon-carrier for gripping the plies of the work-web associated therewith, while the latter is beingV idly moved to prevent movement of the plies relative to each other, which would cause the dierent forms ot a set to get out of register with each other. Each of said clamps includes a spring-pressed baillike member` pivoted on the usual stepped blade-supporting block and having a crosspiece for engagement against the usual baseplate.

A feature of the present invention resides in the provision ot a separate operating crank-arm for each bail arranged for engaging an arm of the latter `for latching it securely in its effective or inetl'ective position.

Otheri'eatures and' advantages will hereinafter appear. I

In the accompanying drawings,

Figure 1 is a fragmentary, longitudinal sectional view, front to rear, or" an Underwood continuous-billing typewriting machine, arranged with two carbon-carriers, one disposed above the other, each having my invention applied thereto.

Figure 2 is a fragmentary perspective View of the carbon-carriers shown in Figure 1.

Figure 3 is a partial front elevational view of the carbon-carriers shown in Figure 2. The dotted-line ligure shows the upper carbon-carrier swung upwardly in position for passing the forward ends of the lower workwebbetween the upper and lower carboncarrlers. v

In a Wernery-Smith type of'Underwood continuous-billing typewriting machine, types 10 strike against a'platen 11 mounted on a platen-shaft l2, journalled in a platendisplacing frame 13 for raising the platen after the typing of a form or 'sectionof a multiple-ply work-web 14, to straighten out the web and strip carbons 15 in a usual way from the typed form to a succeeding form, preparatory to gaging the leading edge of the typed form against a cutting-off gage 16 and severing it by a cutting-olf knife 17. To hold the carbons 15 interleaved between the plies of the work-web 14 a carbon-carrier 20 is employed, which includes the usual carbon-holding blades 21 fastened on stepped mounting blocks 22. v

In many oices it is desirable to have Aa continuous-billing typewriting machine equipped with two carbon-carriers, mounted in a way as is disclosed in my co-pending application Serial No. 108,451, tiled May 12, 1926 (now Patent No. 1,690,844, dated November 6, 1928)', so that the typewriting machine may be convenientl. used with either of two work-webs, means eing providedA by which each work-web can be quickly disposed for idle movement. To secure this advantage in the present invention a base-plate 24 is fastened on a usual bed-plate 24a, which is mounted on rollers 25 to run on a track 26, which may be fast at the front to a usual platen-carriage 26a and be supported in the rear on a rail, not shown', for lateral movement with the platen-carriage. A forwardly-extending operating handle 27 is `fastened on the plate 24. Mounting posts 28 at the right side of the plate 24 have reduced upper end portions in the form of pins 29, and mounting posts 30 at the left side of the plate 24 have reduced upper end portions in the'torm of pins 31 curved or bent leftwardly at their tops. The posts 28 and 30 support an upper base-plate 32 on which are mounted the stepped blocks 22. Stepped mounting blocks 33 are fastened on the base-plate 24 and support blades 34 for holding oarbons 35 interleaved with plies of a second or lower multiple-ply work-web 36. A leftwardly-projecting handle 37 is fastened on the left side of the upper base-plate 32 for swinging the right end portion of the latter up a suflicient distance for conveniently passing the leading ends of the work-web 36 back beneath the upper base-plate 32 and over the blades 34 when the work-web 36 is not in use and the upper work-web 14 is being typed upon. The work-webs 14 and 36 are drawn forwardly over guide-rods 38 and 39 'from sources of supply, not shown, at the rear of the track 26 and below the latter. The construction of the guide-rods and of the carbon-carrier elements mentioned hereinbefore may be substantially the same as that disclosed in my above-mentioned application.

It will be seen by thos-e skilled in the art `that each time the carbon-carriers are moved rearwardly, as, for example, when stripping ca-rbons 15 from a typed form of the workweb 14, a portion of the work-web 36 in the rear of the blade 34 will ride idly back over the guide-rod 39, and then be drawn forwardly over it again as the work-web 14 is linespaced ahead., and its carbon-carrier is pulled ahead with it in a Well-known way. This movement of the work-web 36 over the guiderod 39 tends to cause the plies of the web to creep, andas a consequence thereof, some of the forms in a set will eventually get'out of register a considerable amount, since the creeping is usually cumulative. To prevent this creeping, clamps generally designated as 40 and 41 are provided for gripping the work-webs 14 and 36, respectively, against concave grooved elements 42 and 43 formed in the base- plates 24 and 32, respectively. It will be understood that when the work-web Y 36 is being typed, the work-web will tend to creep in a like manner as described for the web 14. rlghe construction of the clamps 40 and 41 is the same except-in certain particulars hereinafter set forth, and only the clamp 40 will be described in full.

p The clamps 40 have the form of a bail with left and right rearwardly-extending arms 44 and 45, respectively, pivoted about screws 46 in the stepped mounting blocks 22. An integra-l cross-piece 47 connects the forward ends of the arms 44 and 45 and has a centrallydisposed section 43 along its lower edge bent up to ,form a roundsmooth working edge for clamping' engagement with the work-web 14 withoutdanver of cutting or damaging it. To provide fbr the clamp to grip the workweb uniformly all the way across its width, two springs 49 are arranged for pulling down on each of the arms 44 and 45 by having a front end of each spring fastened to a pin 50 in the adjacent stepped mounting block 22, and the rear end to a pin 51 fast in the rear end of the adjacent arm and above its pivot-screw 46.

Te lock the clamp 40 down in effective position, a rearwardly-opening slot 55 is provided in an enlarged forward end portion of the left arm 45, and a notch 56 is made in the lower edge of the arm 45 adjacent the end of the-slot 55. An upright bracket 57 is fastened on the base-plate 32 adjacent the forward end of the slot 55. A latch generally designated as 60 is pivoted about a screw 61 in the upper end of the bracket 57 on the side neXt to the arm 45 and has a depending arm 62 'in whose lower end is fastened a laterally-disposed pin 63, which engages in the slot 55. The latch 60 also includes a crank 65, which extends forwardly a short distance at substantially a right angle to the arm 62. Thence it turns upwardly and forwardly for a purpose to presently appear. In the forward end of the crank 65 is fastened a laterally-disposed inreaching linger-piece 66.

The crank 65 is 'swung up to latch the clamp 40 down in effective position, and the pin 63 is swung tothe forward end of the slot 55, as shown in Figure 2. In this position a line joining the centers of the pin 63 and th-e pivot-- screw 6l will be substantially at a right angle to the arm 44. To raise the clamp 40 and latch it in ineffective position, the crank 65 is swung down and the pin 63 moved rearwardly in the slot 55 and swings up into the notch 56 see Figur-e l), in which position vit is held against the action of the springs 49 by the weight of the crank 65. A light upward pull on the linger-piece 66 is sutlicie'nt to disengage the pin 63 from the notch and permit the springs 49 to swing the clamp downwardly to effective position. It will be noted from Figure l that the crank 65 is swung down to raise the clamp 40. vIn the latter position the above-noted upward turn or bend in the forward end of the crank permits the latter to be disposed above the plane of the work-weby 14, so that the inreaching finger-piece 66 does not interfere with nor rub on the work-web as it is fed forwardly and rearwardly.

The construction and operation of a latch generally designated as 70 for the lower clamp 41 may be substantially the same as that described for the latch 60, except that a crank of the latch 70 will be disposed in a vertical plane adjacent but not over the plane of the crank 65` and a finger-piece 76 will extend outwardly or leftwardly from the crank 75 in the opposite direction from the finger-piece 66. This arrangement of the crank 75 and linger-piece 76 permits the forward end of the lower crank 75 to be swung up past the forward end of the crank 65 'when the mme@ carbon-holding blades which hold carbons interleaved between the plies. The sets of blades are arranged to be mounted one at a time upon a carbon-carrier bed-plate. The arrangement in the present invention of a carbon-carrier with its clamp mounted on it as a unit makes it especially suitable for use in connection with my above-mentioned invention. Each carbon-carrier with its clamp can be readily removed from the bed-plate 24a, and by locking the clamp down first there will be no danger of the dierent plies of a web slipping or creeping relative to each other while the work-webs are stored in the bins of the above-noted invention or are being moved therefrom to be attached on the typewriting machine.

Variations may be resorted to within the scope of invention, and portions of the improvements may be used without others.

Having thus described my invention, I claim:

l. In a set of two carbon-carriers, one superposed above the other, in a continuous billing, carbon-stripping typewriting machine, which machine has a revoluble platen and a web-course arranged for passing two multiple-ply work-webs, one above the other, to the platen to be typed, one at a time, while the other work-web is moved idly over the web-course, the combination, in each of said carboncarriers, of a lip adjacent the front of said set, over which lip the work-web associated therewith passes, a clamp including a bail pivoted for movement downwardly against said lip to clamp the plies of said work-web when it is being moved idly to prevent movement of the plies relative to each other, and means effective for latching said bail in its work-web-clamping position or in a raised ineffective position.

2. In a typewriting machine of the class described, a platen, a set of two separable carbon-carriers, one superposed above the other, arranged for holding carbons interleaved between the plies of an upper and a lower multiple-ply work-web arranged to be fed around said platen, one at a time, means for swinging the upper carbon-carrier upwardly for providing ext-ra` space between said carbon-carriers `for turning the leading end portion of the lower work-web back over its carbon-carrier to be moved idly to and fro while' theother work-webis being-typed, means for moving said carbon-carriers together rearwardly for'stripping thecarbons from a typed section of the work-web disposed around the platen to another succeeding typed section, a clamp for each of said carbon-carriers eective'for gripping the full l width of the idle work-web associated there# with and holding the plies of said idle web fixed against longitudinal movement relative to each other, and a separate latch foreach of said clamps for latching each clamp in its effective position.

8. In a continuous billing, carbonstripping` typewriting machine having a revoluble platen, a set of two carbon-carriers, one superposed above the other, each carbon-carrier effective for holding carbons interleaved between the plies of a multiple-ply work-web, the

arrangement of said carbon-carriers permitting one of said work-w ebs to'` be idly moved to and from the platen'ot" said machine while the other worlr-web is being'typed, a hingelike connection between the lower carbon-carrier and the upper carbon-carrier, whereby the latter may be swung up oreonveniently passing the leading' ends of the work-plies associated with the lower carbon-carrier backwardly between the lower and upper carbon-carriers when said lower work-web is to be idly moved, a clamp engaging across the lower work-web for holding its plies against movement lrelative to each other while being idly moved, and a clamp engaging across the upper work-web for holding its plies against movement relative to each other while being idly moved, said last-mentioned clamp being mountedv on its associated carbon-carrier, so as to be eective while the latter is swung upward, whereby the clamp may hold the' plies of the upper work-web against movement relative to each other while they are being raised to turn the leading ends ofthe lower work-web backwardly over the carbon-carrier associated therewith.

1 4. In a typewriting machine of the class described, a platen, a set of carbon-carriers, oneisu'perposed above the other and each arranged or holdingcar'bons interleaved between the plies of a multiple-ply work-web arranged to be fed around said platen, the

arrangement of said carbon-carriers permiting the leading end. portion of one of the work-webs vto be turned back over its car-y lUO movement 'relative toeach other, and means for latching said clamps in their effective or ineffective positions.

5. A work-gripping clamp for a carboncarrier on a continuous billing typewriting machine, including a bail having two rearwardly-extending arms pivoted for movement in vertical planes and means for latching said clamp in effective and ineffective positions, said means including the forward end of one of said arms arranged with a rearwardly-extending slot and a notch adjacent the rear end of said slot in the upper wall thereof, and a displaceably-mounted pin engaging in the forward end of said slot for latching said clamp in effective position, said pin being effective when disposed in said notch for latching said clamp in ineffective position.

6. In a carbon-carrier of the class described, in combinatiomfa base-plate over which a multiple-ply workweb interleaved with carbons may be passed, said base-plate havinga groove formed therein adjacent its forward edge, a bail including two rearwardly-extending arms pivoted in the rear of said-groove adjacent each side of said baseplate and a laterally-disposed cross-piece connecting the forward ends of said arms and engaging in said groove, one of said arms having a front end portion and a rearwardlyextending sloty therein adjacent the lower side thereof, the upper edge of said slot being in alignment with the lower edge of the rear portion of said last-named arm, said lower edge of said arm having a notch therein adjacent the rear end of said slot, a bracket fast on said base-plate adjacent the forward end of said slot, a crank pivoted on said bracket above said slot and having a downwardly-depending arm, a lateral pin in said arm effective for engaging in said slot and said notch upon operative movements of said crank, and a spring-device effective for pressing all portions of said cross-piece uniformly Y against said work-web over said base-plate, the engagement of said pin in the forward end of said slot being effective to latch said crosspiece down in work-web gripping position and the engagement of said pin in said notch being effective to latch said cross-piece in a raised ineffective position against the pull of Y said spring-device. l

JESSE A. B. SMITH.

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