US1460849A - Beach - Google Patents

Description

July 3, 1923.

. lA-UMR E. B. HES$ V I TYPEWRITING MACHINE Filed Nov, 2-, 1921 3 Patented July 3, 1923.

UNITED' STATES PATENT OFFICE.

EDWARD B. HESS, 01E MANHATTAN BEACH, NEW YORK, ASSIGNOBnTO ROYAL TYPE- WBITIER COMPANY, INC., OF NEW YORK, N. Y., A CORPORATION OF NEW TYPIENRITING MACHINE.

Application filed November 2, 1921.

To a whom may concern:

Be it known that I, EDWARD B. Hines, a citizenoi the United {Fltates residing at Manhattan Beach, in the county ofKings, New York, and State of New York, have invented certain new and useful Improve ments in [llypewriting Machines, of which the following a specification.

This invention relates to front strike visible typewriting machines, in which the type bar segment is raised and lowered for case printing while the platen is held against vertical movement but is free to move crosswise of the machine in the usual way.

My present invention involves novel mecbai'iism for operating; thetype bars for raising and lowering the type bar segment and for operating; the escapement.

The mechanism for operating the type bars is so constructed that the type bars, instead of being moved by the keys troni a position of rest to the printing; point, are moved to apredetermined, position considerably in advance of the platen, beingi cao ried to the printing point by their momentum. In this wa the noise of the impact of the type on the platen is materially rcducedi In my United States Patent No. 139(1 708 oi Sept-13,1921, I have shown a type bar action so constructed: as to reduce noise the type action being movable by the full dcpression of a key to such an extent as to move the associatedtype bar to a predetermined position in fFIOUt Oi the platen and at such distance therefrom as to reduce noise during' a further movement oi the type bar about its pivot tethe platen caused by the momentum of the type bar;

My present invention involves the adaption Of the mechanism of said patent to a machine in which the type bar segment is shifted for case printing instead of the platen being raised and lowered forthis purpose.

In carrylng out my invention 1n the pre ferred way, the type bar segment is sup-- The springs encircle Serial No. 512,352.

The shift key has an upwardly extending arm, which is link connected to anarm on a horizontally arranged shaft, which is provided with arms that have slot and pin connections with the segment supporting rods. When the shift key is depressed to its full extent, the segment is lowered and it may be held in the lower position by a shift'key locking device provided witha finger piece, by means of which the lock may be opened to allow the segment to rise to normal posi-- tion.

The type bars are pivoted at their inner or rear ends to the segment while their front ends are normally supported by a cushioned. type bar rest connected by frame pieces to the segmentlso as torise and fall therewith. The type bars are connected with the key levers by a system of links and levers arranged in a novel way andiin such manner that some of. the parts are moved to a toggle locking or dead center position when the keys are fully depressed, a further movement oi? the type bars to the print point beingcausedbythe momentumot the type bars. In this way noise is reduced; The type bar action just described is so organized that it operates efiieiently andin the same way in either position of the type bar segment;

The carriage escapement is operated by partso'l the type bar action, the release taking place during the momentum period of the type bars i. e., when they tre passing from their dead center or toggle locking pos tion to the printing point. Preferably the connections between the key levers and the type bars comprise horizontally an "ranged levers which are link connectedwith the key levers and are link connected with two-armed levers carried by a stationary segment in rear of the type bar segment. These two-armed levers are link connected with the type bars above and; in front'of their pivots.

In the accompanying drawings Figure 1 is a view partly in section and partly in side elevation of parts of a typewriting machine with my improvements applied, only such parts of the mechanism being shown as are necessary to illustrate my improvements;

Fi ure 2 is a dia 'rammat-ic view. showin b b 1::

the connections of a type bar with, certain levers in the type bar action and this figure illustrates by full lines the dead center or toggle locking position and also by dotted lines t e position of these parts after the dead center position has been passed.

A portion of a typewriter carriage is indicated at A, and B indicates a platen. C indicates the escapement mechanism and D the type bar segment. A type bar guide E is attached to the segment and is raised and lowered therewith. The segment is as usualsemi-circular and the type bars F are pivotally connected therewith at f, while the outer ends of the type bars are normally supported in acushioned type bar rest G connected by frame pieces G with the segment D in such manner that the type bar rest moves up and down with the segment. The segment'D is supported by springs H encircling posts or rods I whichv are attached to the under side of the segment and extend through thelaterally projecting portions of a frame or bracket J. The springs H rest on; nuts K'which engage tapped openings in the extentions The rods I extend through the extensions and also through nuts Lbelow the extension; By adjusting the nuts K, the tension of the spring H may be adjusted. Each rod I also extends through a part j of the frame or bracket J and through a nut M which has a threaded connection with the bracket. Each rod I carries a collar N which is fastened as indicated at n to the rod. By adjusting the nuts L and M, the vertical movement of the rods and consequently of the segment may be adjusted. The rods 1 have a slot and pin connection indicated at O with arms P extending from a horizontally arranged shaft Q from which extends an arm (7 connected by a link R with the arm S of the shift key lever S. The drawings show only one shift key as being connected with the shaft Q, but it is understood that if another such key is employed, it is similar in construction to that shown and is connected with the shaft Q in a similar way. The

' ed by a spring 6 to a lug t on the lower part of the lever S. The, lever S carries a stop 8- against which the lever t is pulled by the spring 25 and the lever t is notched at 25 near its upper end, adapting 'it to engage an adjustable pin t on the frame of themaehine. When the shift key S is depressed, the lever t automatically engages the pin 25 and holds the shift key in:

lowered position or in such position as to hold the type bar segment in lower position. By merely pressing down 011 the lover 1., it may be disengaged from the pin 25 and the shift key will rise to normal position. The shift key, is pivotally mounted in the frame U on a rod U, and the key levers V for operating the type bars are also pivotally mounted on said rod. The key levers are held normally in raised position against a stop A by springs W attached to a frame to placed adjacent a frame X in which are mounted a series of horizontally arranged levers Y which are connected by links 7 with the key levers V. These levers Y extend rearwardly from the frame X to the rear part of the machine and are connected by links Y with two-armed levers Z which are pivotally mounted in a stationary segmentZ arranged in'rear of the movable segment D. It will be understood that there is one such two-armed lever for arh key lever and each type bar. The type bars F, as before stated, are pivotally mounted in the movable segment D. They are held in normal position and prevented from vibrating by springs f attached to lugs 7' extending from the lower portions of the type bars to a fran'ie F. Each type bar has anupwardly extending lug which is connected by a link (Z with a two-armed lever Z. The connections are such that when a key lever V is depressed, the corresponding lever Y is moved downward and operates upon the two-armed lever Z by the link connections shown, to raise a type bar to the inclined dotted line position shown in Figure 1. at F such position being considerably more than five degrees from the platen and at such distance therefrom as to reduce noise during a further movement of the type bar to the platen caused by its momentum. The connections are also such that when a key lever is depressed to its full extent. parts of the action are brought to a toggle lot-king or dead center position. This is illustrated in Figure 2. As there shown. the center about which the lever Z mores is indicated at The link Y has a pivotal connection at 2" with the lever Z and it has a pivotal. connection at 3 with the lover Y. Figure 2 shows by full lines that the parts 2, .2 and y are in a straight line which is a toggle locking or dead center position, the parts being brought to this position by a full depression of a key lever. The momentum of the type bar, however, carries the parts to the dotted line position. Figure 2, thus moving the parts out of the dead center position and during this movement the type bar is carried to the printing point.

The organization is such that in the upper or lower position of the type bar segment, the type bars are operated in the same way, 1. e.. they are moved by the full (lGPIGSSlOH. of the the rocker rearwards, and a spring 0" tends to' draw the frame C forward, the forward movement of the frame C being limited by a screw 0 which engages a lug 0* on one of thehangers The screw 0 limits the rearward movement ofthe upper end of the rocker. a

Normally the levers Z occupy the position shown by full lines in Figure 1, the upper front portion of the levers Z being disposed a considerable distance in advance of the frame C. When a key lever is depressed to its full extent, itmoves theasrecociated twoarmed lever Z to the dotted line position shown at m, Fig. l, and brings the upper end of the lever into contact with the frame C without moving it. When the type bar by itsmomentum moves from its position F to the printing point, the lever Z moves to the position shown by dot and dash lines 3 and in doing so moves the frame C rearwards and operates the escapementp The frame C is in fact a universal bar. It is semicircular in shape and is engaged by all the levers Z. It will thus be seen that in the preferred construction the" universal bar which operates the escapement mechanism is actuated during thelatter part of the movement of the type bars and, in fact, during the momentum period thereof. ln this way the operation of thecscapement is greatly improved.

While as before stated, one part of my invention consists in adapting the type bar action of my patent of Sept. '13, 1921 to a typewriting machine in which the type segment is raised and lowered for case printing,

l my invention also involves certain novel of a vertically movablescgment to which the type bars are pivoted, posts depending from the segment, brackets through which the posts extend, springs surrounding the posts for normally holding the segment in its upper position, nuts engaging the brackets for adjusting the tension ofthe sprin -s and means for depressing the segment to its lower position.

2. In a typewriting machine the combination with the key levers and the type bars, of a vertically movable segment to which the type bars are pivoted, posts depending from the segment, springs surrounding the posts for normally holding the segment in upper position, brackets through which the posts extend, collars carried by the posts and adjustable nuts through which the posts extend and which are adapted to engage the collars to limit the movement of the posts.

3. In a typewriting machine the combination with the key levers and the type bars, of a vertically movable segment to which the type bars are pivoted, means for normally holding the segment in itsupper position, a shift key having an upwardly projecting arm at its rear end, a rock shaft to which said arm is link connected and connections between said rock shaft and the segment for moving it to its lower position.

4:, In a typewritinp; machine the combination with the key levers and the type bars, of a vertically movable segment to which the type bars are pivoted, posts depending from the segment, springs surrounding the posts for normally holding the segment in its upper position, a shift key, a rock shaft to which it is link connected, and arms on the rock shaft operatively' connected with the segment posts. 1 l a 5. In a typewriting machine the combination withthe key levers and the type bars, of a vertically movable segment to which the type bars are pivoted, and a noise re ducing type action comprising connections between a type bar and a key lever movable tosuch an extent by the full depression of the key in either position of the segment as to move the type bar to a predetermined position in front of the platen and at such a distance therefroiri as to reduce noise during; a further movement of the type bar about its pivot to the platen caused by the momentum of the type bar.

6. In a typewriting machine the combination with the key levers and the type bars, of a vertically movable segment to which the type bars are pivoted, and a noise reducing type action comprising toggledink connections between a type bar and a key lever movable to such an extent by the full depression of a key in either position of the segment as to move the associated type bar to a toggle-locking position in. front of the platen and at such distance therefrom as to reduce noise during the further movement of the type bar about its pivot to the platen caused by the momentum of the type bar.

7. In a typewriting machine the combination with the key levers and the type bars, of a. vertically movable segment to which the type bars are pivoted, and a noise reducing type action comprising connections between a type bar and an associated key 3 lever movable to such an extent by the full depression of an associated key in either position of the segn'ient as to move the associated type bar to a position in front of the platen and at a distance therefrom considerably more than and at such distance as to reduce noise during a further movement'of the type bar about its pivot to the platen caused by the momentum of the typ bar. I I

8. In a typewriting machine the combination with the key levers and the type bars, of a vertically movable segment to which the type bars are pivoted, a stationary segment in rear of the type bar segment, two armed levers mounted in said stationary segment, link connections between said levers and the type bars, levers intermediate the two armed levers and the key levers, and link connections between said intermediate levers and the key levers and between the intermediate levers and the two armed levers.

9. In a typewriting machine the combination of the key levers and the type bars, of a vertically movable segment to which the type bars are pivoted, a stationary segment in rear of the type bar segment, two armed levers pivotally mounted in said stationary segment, link connections between said two armed levers and the type bars in front of and above their pivots, intermediate levers between the two armed levers and the key levers and link connections between the key levers, the intermediate levers and the twoarmed levers. I

10. In a typewriting machine the combination with the key levers and the type bars, of a vertically movable segment to which the type bars are pivoted, and connections between the key levers and the type bars comprising two armed levers mounted in rear of the type bar pivots, intermediate levers between the two armed lever and the key levers, link connections between the two armed levers and the type bars and link connections between the intermediate levers and the two armed levers, said last mentioned links having pivotal connections at opposite ends with the intermediate levers and the two armed levers which are movable to such an extent by the full depression of the keys as to move said pivotal connections to a dead center position with the type bars at a considerable distance from the platen, the further movement of the type bars to the platen being caused by their momentum.

11. In a typewriting machine, the combination with the key levers and type bars,

of a vertically shiftable segment in which the type bars are pivoted, non-shiftable' levers mounted in the rear of the type bar pivots, operative connections between said levers and type bars, connections between the levers and the key levers including links which are movable to a dead center position by a full depression of the keys with the type bars at a distance from the platen from which position they complete their travel by momentum alone, thereby reducing noise.

12. In a typewriting machine, the combination with the key levers and type bars, of avertically shiftable segment in which the type bars are. pivoted, non-shiftable levers mounted in the rear of the type bar pivots, operative connections between the levers and the type bars, connections between the levers and the key levers includ ing links the ends of which are movable into a straight line with the pivots of the non-shiftable levers by a full depression of the key levers with the type bars at a dis tance from the platen, from which position they complete their travel through momentum alone, thereby reducing noise.

In testimony whereof, I have hereunto subscribed my name.

EDWARD B. HESS.

Images