US932644A - Type-writing machine. - Google Patents

Description

G. H. SHEPARD.

TYPE WRITING MACHINE. APPLICATION FILED APB.17, 1909.

Patented Aug. 3 1-, 1909.

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HIS TTEIRNEY C. H. SHEPARD. TYPE WRITING MACHINE.

APIPLIGATION FILED APR.17, 1909.

932,644, Patented Aug. 31, 1909.

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0. H. SHEPARD.

TYPE WRITING MACHINE. APPLICATION PILED APR.17, 1909.

932,644. Patented Aug. 31, 1909.

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WITNE55E5= I v |N\/ENTIIIR= HIEATTEIRNEY the upper case position and some of the parts carrying a platen 4 dia CHARLES H. SHEPARD, OFNEW YOR K, N. Y., ASSIGNOR T0 onto,

Un on TYPEWRITER compan or JERSEY CITY, JERSEY, A CORPORATION OF NEW JERSEY.

TYPE-WRITING MACHINE.

Specification of Letters Patent. Patented Aug, 31, 1909., Application filed April 17, 1909.1 Serial No. 490,530.

-To all whom it may concern:

Be itknown that I, CHARLES H. SHEP- ARD, citizen of the United States, and resident of the-borough of Manhattan, city of New York, in the county of New Yorkand To the above and other ends which' will hereinafter appear, my invention consists in the features of construction, arrangements of parts and combinations of devices to be hereinafter described and particularly pointed out in the appended claims.

In the accompanying drawings wherein like reference characters indicate corresponding| parts in the various views, Figure 1- is a vertical, central, fore and aft sectional view of the typewriting machine embodying my invention, so much only of'the machine being shown as is necessary to illustrate my.

invention in its embodiment therein. Fig. 2 is a vertical, transverse sectional View of the same taken on the line w-w of Fig. 1 and looking in the direction of the arrow at said line. Fig. 3 is a fragmentary, vertical sectional view corresponding to Fig 1 except that the segment is shown shiftedlto illustrated in Fig. -1 are omitted. I have shown my invention embodied in a typewriting machine resembling the Mon arch machine, though it should be understood that the invention may be embodied in various styles of typewriting machines.

The frame of the machine comprises a base 1, corner posts 2 and a top plate 3. A carriage of any suitable descriptionis mounted on a top plate for movement from side to side of the machine, the carriage ammatically shown in the drawings. Key evers 5 are provided with curved contact edges 6 which cooperate witha fulcrum plate? secured in the base of the machine, each key lever being- 'sprin provided with a restoring spring 8 and a finger key 9. A sub-lever 10 is pivoted to each .'key lever at 11 and is slotted at 12 for the reception of a fulcrum rod 13 which extends beneath the various key levers and is secured at its ends to the base of the ma chine. Pull links 14 are each pivotally connected at one end to the upper end of a sublever, as at 15, and at] the opposite end are pivoted to a type bar 16, as indicated at 17. The type bars are supported at their forward ends on a type rest 18' secured to forwardly projecting rods 19 which are secured to a type bar segment 20. The various type bars are pivoted, as at 21,to the type bar hangers 22 secured to the type barsegment 20. The frame of the machine also comprises a cross bar 23 and upright end bars 24. Parallel leaf springs 25 and 26 are each secured atone end to the type bar segment by screws 27, the springs 26 being connected to the upper and outer ends of thesegment and extending forwardly therefrom to the upright bars 24 to'which they are connected by screws 28. The single centrally disposed 25 is connected at one end to the midd e of the segment and at its opposite end by screws'29 to the cross bar 23. These leaf springs are all disposed parallel to one another and constitute springs on which the type barsegmentis-supported and adapted to be shifted, the segment in its case shifting movement being guided by the springs.

Each of the springs 25 and 26 has an adjusting' device, shoe or contact piece 80' cooperating. therewith. One end of each of the'adjusting devices 30 bears against the bottom of its associated spring when the segment' is in the normal or lower case position, whereas the opposite-end of each device 30 is receivedv in a slot or cut-out 31 in the part-to which it is secured. An adjusting in each a usting' device 30 and takes at its threaded end ma tapped opening in the part to which the spring is connected.- From a comparison of Figs. 1 and 3zit will be seen that the adjusting devices cooperate, with ment is the shifted positionshown in screw 32' passes freely through an opening Fig 3 i The purpose of these adjusting devices is to alter the effective pressure of the springs when the segment, or shiftable element, is in the normal or lowercase position and thus regulate or determine the amount of effort or pressure required to shift the segment from the normal position. -By adjusting a screw 32, the companion adjusting device .30 may be, turned around its lowerend' as a fulcrum in the slot 31, to increase or decrease'the effectiveness of the associated-spring when the segment is in the normal or lower case position, thereby determining the amount of pressure required on a shift key to shift the segment. If the screw be turned out pressure of the adjusting device on the spring, when the segment is in the normal position, is relieved or entirely released, whereas if the screws be turned in or adjusted forwardly then the devices'30 exert an n ward pressure on the springs to decrease t e effective downward pressure of the springs on the segment when the latter is in the normal position. 'Projecting rearwardly from the type bar seg- 'ment arelugs 33 tapped to receive oppositely disposed set screws 34. A set of these lugs and set screws is provided on each side of the segment and the screws cooperate into use.

with a fixed abutment or stop 35 which projects forwardly from an upwardly extending bracket arm 36 secured by a screw 37 to the base of the machine. The screw stops 34 and abutments 35 with which they coo crate limit the case shifting movements of t esegment A rock shaft 38 is mounted at its ends on pivot screws 39 received in tapped openings in the base of the machine. Shift key levers 40 are secured at opposite ends of the rock shaft by screws 4:1. A centrally "dis osed crank arm 42. projects rearwardly 'rom the rock shaft and is pivoted at 43 to 'a depending arm 44 secured to the type bar segment.

The-segment '20'is normally disposed as shown in' Fig. 1 so that the types of the outer end of the type bars strike the printing movement of the segment'or shiftable ele- 1 ment, and that the springs thus effectively guide the segment in its shifting movements. It will also be seen that by the use of the. springs disposed in the manner described,

the springs efiectively resist any -backwai'd movement of' the segment due to the backward pull of the links 14 on the type bars and also to a certain extent resist any forward reactionary movement of the segment; the backward pull and forward reaction being exerted in the directions of the lengths of the springs. The mounting ofthe segment on springs in the manner shown, therefore most effectively preserves the alinement. Moreover, by the use of springs or flexing elements, each secured at one end to the frame of the machine, or to the part which carries it, and secured at the other end to the shiftable element, all jointed connections are avoidedin the elements on which the segment is shifted. There such jointed connections are employed there is apt to be lost motion produced by Wear or necessary looseness at the joints and such lost motion may seriously affect the alinement. These disadvantages are, however, overcome by the employment of my construction and the alinement is efliciently preserved.

When the springs are employed in a top or bottom-strike machine they,may likewise constitute means for restoringthe segment or shifted element to normal position when pressure is released upon the depressed shift It will be understood that the springs 25 and 26 constitute what I term bar springs and this term I use to distinguish them from coiled springs. The term flexing elements or the like is employed herein to designate a liable member or one which is made of exible material as distinguished from the jointed members.

--It will also be understood that I have provided simple and eflicient means for affording a relative case shifting movement between the types and the platen and that' from a broad 'aspect of my invention it is .immaterial which of these elements, 11. 6.,

the types or the platen is shifted, m invention contemplating broadly the emp oyment of "springs on which the shiftable element shall receive a'case shifting movement.

l-Vhat I claim as new and desire to'secure by Letters Patent, is

1. In a typewriting machine, the combination of a laten, a series of ty e bars, means for alfor in a relative shi t .between the type bars and platen to change the case position, said means comprising one or more springs on which the movable element is shifted.

2. In a typewriting machine, the combination of a platen, a series; of ty e bars,-means for afiordin a relative shif t between the type bars and platen to change the case posi- 131011, said means comprisingia plurality of parallel springs on which e movable element is shifted.

- 3. In a typewriting machine, the combina tion of a platen, a series of type bars, means for aflordin a relative shift. between the type bars an platen to change the ease position, said means comprising a plurality of bar springs on which the shiftable element is shifted, said springs being secured to the shiftable element.

4. In a typewriting machine, the combination of a platen, a series of type bars, means foralfording a relative shift betweenthe' 5. In a typewriting machine, the combination of a platen, a series of type bars, means for afl'ording a relative shift between the j type bars and platen to'change the case position, said means comprising a plurality of parallel bar s ringson which the shiftable element is shi ted, the bar springs extending longitudinally in a direction transverse to the plane of movement of the shiftable element and guiding the shiftable element in its case shifting movement.

6. In a typewriting machine, the combination of a vertically movable type bar segment, and springs on which said segment is mounted and on which it is' adapted to receive its case shifting movements.

7. In a typewriting machine, the combination of a vertically movable type bar segment, and parallel bar springs on which said segmentis mounted and by which it is guided in its case shifting movements, said springs extending longitudinally in a direcplane of movement of the type bar segment.

8. In a typewriting machine, the combi: nation of a vertically movable type ba'r seg ment, and parallel bar v springs on which said segment is mounted and by which it is guided in its case shifting movements, each of sai springs being rigidly secured at one end t said segment and at the other end to the frame of the machine and all of said springs extending longitudinally in a direction transverse to the plane of movement of the type bar segment. v

9. In a typewriting machine, the combination of a type bar segment shiftable to change the case position of the type, three parallel leaf springs on which said segmentis mounted and by which the segment is guided in 1ts case shifting movements,-two

of the springs being connected ator near.

the ends of the segment and one of .the springs being connected to the segment near the middle thereof, and all of said springs extending longitudinally in a directlon at substantially right angles to the caseshifting movements of the segment.

10. In a typewritingmachine, the combination of a platen, a series of type bars, means for afi'ording a relative shift between the type bars and platen to change the case position, said means. comprising one or more springs on Which the movable element is shifted, and means'for regulating the pressure exerted by said spring or springs.

11. In a typewriting machine, the combination of a platen, a series. of type bars, means for affording a relative shift between the type bars and platen to change the case position, said means comprising a plurality of parallel springs on which the movable element is shifted, and means for regulating the pressure exerted by said springs.

12. In a typewriting machine the combination of a platen, a series 0. type bars,

' means for affordinga relative shift between the type bars and platen to change the case position, said means comprising a plurality of bar springs on which the shiftable element is shifted, said springs. being secured to the shiftable element, and adjustable means for regulating the pressure exerted by said springs.

13. In a typewriting machine, the combination of a platen, a series of type bars, means for affording a relative shift between the type bars and platen to change the case position, said means comprising a plurality of parallel leaf springs on which the shiftable element is shifted, each of said leaf springs being secured at one end to the shiftable element and at the other end to a relatively fixed support, the springs being flexed at each case shiftingmovement, and individually adjustable means associated with each of said springs .to regulate the pressure exerted by said springs.

14. In a typewriting machine, the combi- I nation of a platen, a series of type bar s,

means for affording a relative shift between the type bars and platen to change the case position, said means comprising a plurality of parallel bar springs on which the shiftable element is shifted, the bar springs extending longitudinally in a .direction transverse to the plane of movement of the shiftable element-and guiding the shiftable element in its case shifting movement, and adjusting means associated with each of said springs.

15. In a typewriting machine, the combination of a platen, a series of type bars,

means for affording a relative shift between the type bars and platen to change the case position, said means comprising a plurality of parallel bar springs on which the shiftable element isshifted, the bar springs ex-' tending longitudinally in a direction trans verse to the plane of movement of the shiftable element and guiding the shiftable element in its case shifting movement, and an adjustable contact adapted -to bear on each spring thereby.

16. In a typewriting machine, the combiand regulate the pressure exerted nation of a platen, 'aseries of type bars, city of New York, in the county of New and means forafic'ording a relative ease York, and Sta-t e of New York, this 16th shift between the type bars and platen, said day of April A. D. 1909.

means comprising a plurality of flexing ele- CHARLES H. SHEPARD. .5 'ments on which the shiftable member is Witnesses: mounted and shifted.

CHARLES E. SMITH,- Signed at the borough of Manhattan, M. F. HANNWEBER.

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