US759817A - Type-writer line-spacing mechanism. - Google Patents

Description

PATENTED MAY 10, 1904.

J. H. W. MARRIOTT. TYPE WRITER LINE SPAGING MECHANISM.

APPLIOATION FILED D110. 5. 1903.

N0 MODEL.

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Patented May 10, 1904.

UNITED STATES PATENT OEEIcE.

JAMES H. W. MARRIOTT, OF WASHINGTON, DISTITRIOT OF COLUMBIA.

TYPE-WRITER LINE-:SPACING MECHANISM.

SPECIFICATION forming part of LettersPatent No. 759,817, dated May 10, 1904:.

Original application filed March 19, 1903, Serial No. 148,611.

1'0 on whom it may concern.-

Be it known that I, JAMns H. W. MARRIOTT, a citizen of the United States, residing atVVashington, in the District of Columbia, have invented certain new and useful Improvements in Type-VVriter Line-Spacing Mechanism, of which the following is a specification. p

This invention comprises improvements in line-spacing mechanism forwriting-machines which are bodilymovable upon suitable guideways and adapted to write upon flat printingsurfaces, such as the machine shown In my application, Serial No. 1 18,6511, filed March 19, 1903, of which the present application is a division. I

In the accompanying drawings, Figure 1 is i j a side view ofthe main supporting-carriage for the writing-machine, mounted upon stationary guide-rails and providedwith my improved spacing mechanism; and Fig. 2 is a plan view of .the same, partly broken away.

Referringto the drawings, A and B indicate a pair of parallel rails or guideways, supported horizontally in fixedposition at a suitable distance above the writing-bed by standards. or uprights 1 and 2, which are secured to the guideways and to a supporting-table 3. Parallel toothed racks 4: and 4c are formed or ar' ranged upon the upper edge of each rail a short distance apart, leaving between the racks of each guideway a channel 5.

A supporting frame or carriage O for the printing mechanism is suspended between the machine-guideways by means of a pair of wide pinions 6, eachextending across and engaging both racks of a guideway, anda pair of double pinions 7 each engaging both racks of a guideway and having a central rib or disk 7 which extends into the channel 5. The main supporting-frame O consists of a pair of similar triangular side plates or hangers 8 and 8 and cross-bars 9 and 10, connecting said hangers with one another. The pinions 6 are journaled upon studs 11, secured to the forward ends of the hangers, and the pinions 7 are fixed to the ends of a shaft 12, which is journaled in the rear ends of the hangers. The disks 7 fitting within the channels 5, prevent any side play of the frame, and as all of the pinions by a spring23.

Divided and this application filed December 5, 1903. Serial (,No model.)

have a wide bearing on the racks the frame is I held rigidly against any twisting tendency in operation. A rack-bar 13 is journaled in the lower part of the supporting-frame, and the writing mechanism is carried by a frame sccured to this rackbar, but not herein shown, as this mechanism forms nopart of the invention claimed herein.

The supporting-frame O, which carries the printing mechanism, is movable longitudinally of the machineguideways with a step-by-stcp motion for line-spacing by means of a spacing-lever 1 1, fulcrumed upon a stud 15,projecting laterally from the hanger 8", a short pawlcarrying lever 16, fulcrumed upon a stud 17, also secured to said hanger, and a spring-pawl 18,pivoted to one end of the short lever and eugaging a ratchet-wheel 19, which is secured upon the end of the pinion-shaft 12. The

levers 14 and 16 lie normally at an angle to one I and the latter being held in the position shown by a spring 14, connected to the lever 1 1 and to a bracket 22 upon the hanger 8". The pawl is held in engagement with the ratchet-wheel when the forward end of the spacing-lever 1 1 is depressed the pawl will be depressed and the ratchet-wheel and shaft 12 will be turned, thereby causing the pinions 7, which are sccured to the shaft and engage the rack, to move the carriage forward, as will be evident from an inspection of the drawings. The distance to which the machine moves at each operation of the spacing-lever is determined by adjustable stops 2 1 and 25, which are supported by brackets 22 and 26 upon the hanger 8. These stops limit the movement of the spacing-lever in both directions. A spring holding-pawl 27, pivoted to an offset end 28 of the hanger 8, normally prevents backward rotation of the ratchet-wheel, and hence prevents backward movement of the entire mechanism. The

moving pawl 18 and the holding-pawl 27,which are pivoted at opposite sides of the ratchetwheel, are provided with upwardly-extending arms 18 and 27 respectively, in line with pins or projections 29 and 30,which are secured to a The arrangement is such that longitudinally-movable push-rod 31, mounted in bearings 32 and 33 at opposite ends of the hanger 8 A spring 34, interposed between the bearing 32 and a knob35 at the forward end ofthe push-rod, normally holds said rod in its forward position with the pins 29 and 30 out of engagement with the arms upon the pawls. When it is desired to move the machine rearwardly upon the guideways, however, the push-rod is pressed backward and the pins 29 and 30 engage the arms upon the pawls and lift both pawls out of engagement with the ratchet-wheel. After the pawls have become disengaged a stop-pin 36 upon the push-rod engages the bracket 26 upon the supportingframe, and the continued rearward pressure upon the push-rod then forces the machine rearwardly upon the guideways. The mechanism may at any time be drawn forward upon the guideways without operating the spacinglever by grasping any convenient part of the machine and pulling it forward.

Having described my invention, what I claim, and desire to secure by Letters Patent, 1s

1. In a type-writing machine, the combination with a pair of parallel machine-guideways, each guidewayhavingapair of parallel racks thereon, of a machine-supporting carriage having pinions engaging said racks, said pinions having disks or ribs fitting between the racks and preventing lateral movement of the frame.

2. In a type-writing machine, the combination with a pair of parallel machineguideways, each guideway having a pair of parallel racks thereon, of a machine-supporting carriage having pinions at its frontand rear ends engaging both racks of each guideway, one or more of said pinions having ribs or disks extending between the racks.

3. In a type-writing machine, the combination with a pair of parallel machineguideways having racks thereon, of a machine-supporting carriage, a shaft journaled in said carriage and having pinions secured to its ends and engaging said racks, a ratchet-wheel upon said shaft, moving and holding pawls normally engaging said ratchet-wheel, a spacinglever arranged to operate the moving pawl for line-spacing, and a device for moving and holding both of said pawls out of engagement with the ratchet-wheel.

4. In a type-writing machine, the combination with a pair of parallel machine-guideways having racks thereon, of a machine-supporting carriage, a shaft extending trans versely of said carriage and journaled therein,

pinions secured to the ends of said shaft and engaging said racks, a ratchet-wheel upon said shaft, moving and holding pawls normally engaging said ratchet-wheel, aspacinglever arranged to operate the moving pawl for line-spacing, a push-rod having parts adapted to engage and move said pawls away from the ratchet-wheel when the push-rod is moved in one direction, a stop upon said rod adapted to engage a part upon the frame when the rod is moved to release the pawls, and means for holding the push-rod out of engagement with the pawls.

5. In a type-writing machine, the combination with a pair of parallel machine-guideways having racks thereon, of a machine-supporting carriage, a shaft extending transversely of said carriage and journaled therein, pinions secured to the ends of said shaft and engaging said racks, a ratchet-wheel upon said shaft, a pawl-carrying lever pivoted to said frame and having a pawl thereon adapted to engage and turn the ratchet-wheel, and a spacing-lever pivoted to the frame and adapted to rock the pawl-carrying lever.

6. In a type-writing machine, the combination with a pair of parallel machine-guideways having racks thereon, of a machine-supporting carriage, a shaft extending transversely of said carriage and journaled therein, pinions secured to the ends of said shaft and engaging said racks, a ratchet-wheel upon said shaft, a pawl-carrying lever pivoted to said frame and having a pawl thereon adapted to engage and turn the ratchet-wheel, a spacing-lever pivoted to the frame and adapted to rock the pawl-carrying lever, and an adjustable stop for limiting the movement of the spacing-lever.

7. In a type-writing machine, the combination with a pair of parallel machineguideways having racks thereon, of a machine-supporting carriage, a shaft extending transversely of said carriage and journaled therein, pinions secured to the ends of said shaft and engaging said racks, a ratchet-wheel upon said shaft, a pawl-carrying lever pivoted to said frame and having a slot in one end and a pawl at its opposite end, said pawl being adapted to engage and turn the ratchet-wheel, and a spacing-lever pivoted to said frame and having a pin or projection engaging said slot.

In testimony whereofI afliX my signature in presence of two witnesses.

JAMES H. W. MARRIOTT.

W'itnesses:

ROBERT WATSON, BERNARD W. Bo rrz.

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