US766813A

US766813A - Type-writer.

Info

Publication number: US766813A
Application number: US4888701A
Authority: US
Inventors: Jean Francois David
Original assignee: Individual
Current assignee: Individual
Priority date: 1901-02-26
Filing date: 1901-02-26
Publication date: 1904-08-09
Anticipated expiration: 1921-08-09

Description

No. 766,813. PATENTED AUG. 9, 1904 J. F. DAVID. TYPE WRITER.

APPLIOATIOX nun r1111, 20, 1901.

6 SHEETS-$3321 1.

H0 MODEL.

a @Qm w v27 v a WM mm NM Q km Q 3% ww Q \w mm My x 3. Q m x V. N E w x x.

W/T/YESSES:

No. 766,813. PATENTED AUG. 9, 1904.

J. F. DAVID. TYPE WRITER.

' APPLICATION nun 313.26. i901. so 110mm. e snnnws-snnnr 2.

nrmnsrs I No. 766,813. PATENTED AUG. 9, 1904 J. F. DAVID.

TYPE WRITER.

APPLIOATION FILED FEB. 26, 1901. H0 MODEL. B SHEETS-SHEET 3.

mum:

' PATENTBD AUG} 9, 1904 No. 766,813. I

J. F. DAVID.

TYPE WRITER.

APPLICATION FILED FEB. 26, 1901.

H0 MODEL. SHEETS-SHBET 4.

Y 9 w vavroe ZZ a)? ATTORNEVS PATENTED AUG. 9, 1904.

' J. F. DAVID. TYPE WRITER.

APPLICATION 2mm ran. 28, 1901.

a M! VENTOI? A TTORIIEJ'S Patented August 9, 1904.

UNITED STATES PATENT OFFICE.

JEAN FRANQOIS DAVID, OF NANITUA, FRANCE.

TYPE-"WRITER.

SPECIFICATION forming part of Letters Patent No. 766,813, dated August 9, 1904.

Application filed February 26, 1901- Serial No. @8387. (N0 model.)

To all whom, it may concern:

Be it known that I, J nan FRANooIs DAVID, gentleman, residing at 84. Grande Rue. N antua, in the Republic of France, have invented certain new and useful lmprovements in Type- Writers, of which the following-is a full,clear, and exact specification.

The subject of the present-invention has reference to improvements in type-writers.

My invention is shown in detail in the accompanying drawings, in which* Figure l is a sectional elevation of the ma chine along its axis. Fig. 2 is a plan. Fig. 3 is a plan of the details of the arrangement of the type-bars and guide. Fig. 4: is a crosssection of the carriage, showing the line-spacing mechanism. Fig. 5 is a view of the bottom of the machine. the keyboard, inker, and carriage being supposed to be removed. Fig. 6 is a cross-section on AB of Fig. 1, showing the feeding mechanism for the carriage. Fig. 7 is a partial sectional elevation showing the details of the mechanism of the type-bars. Fig. 8 is a side elevation showing the detail of one ofthe key-reeds. Fig. 9 is a partial sectional elevation showing the details of the mechanism for raising the inker by means of the line-spacing mechanism.

Referring by reference characters to the drawings, the letter a designates a suitable case within which are supported the working parts and which maybe provided with a suitable cover, if desired. A pair of parallel plates (Z and a are rigidly connected at the front by a plate 7', pivoted to the case or frame by pintles or projections The lower plate d is of greater extent than the upper plate and supports the type-bars f, which bear, preferably at their lower edges, on a wear or supporting bar 7, supported by the lower plate d. These type-bars are arranged radially and are designed to be propelled forward against the tension of the retracting-springs 0 by the vertical movement of the key-rods g, which are guided in apertures in the plates (Z and e and provided at their upper ends with keys g bearing the ordinary type characters.

The downward movement of the key-rods transmits horizontal movement to the typebars by means of the following connections:

The key-rods are slotted to permit the passage of wires or cords 'Z, one end of each wire being secured to the plate (Z and the other end to the corresponding type bar, as clearly shown in Fig. 1. Each key-rod carries a pulley or roller Z, journaled in its slot and bearing against the wire, so that when the key-rod is depressed the wire will be drawn and the corresponding type-bar propelled forward to strike the platen. Immediately upon the removal of the finger from the key the spring 0 will retract the type-bar and simultaneously raise the key-rod to normal position. I prefe ably provide antifrictionrollers 01. for. the wires, as shown in Fig. 7.

In order to accurately guide each type-bar, so that the letters will be properly spaced, side plates 71: are provided, pivoted at 11 to the sides of the case. to which side bars the guides 7321.1'0 connected, these guides having inclined spaces converging to the printingpoint, as clearly shown in Fig. 2.

It will be observed that type-bars carry at their forward ends six rows of type and that when the parts are normally in the position shown in Fig. 1 the uppermost row of type will print. In order to bring the successive rows into line, I provide the following-described mechanism: To the side bars A" are connected by eyes or staples 9, as shown in Fig. 10, the rear ends of rods .9. which are connected at their forward ends to a curved bar 10, so that by the depression of this bar the guide will be raised. The guide 7: carries at its lower side a plate 8, which has an inclined face, and when the guide and plate 8 are lifted the forward ends of the type-bars will ride up said inclined face and be lifted a distance sufficient to bring the second row of type into position. In order to bring the third row into position, provide a key 1, carried by averticallyanoving rod having an adjustable contact-screw 3, bearing on a plate 4: of a frame 4:, pivoted at 5 in the case and supported in normal position by an adjustable stop 6 at its rear end. The said rear end carries a bar t, which supports the plate at in normal position. To bring the fourth row into printing position, it will be readily seen that it is only necessary to simultaneously depress key 1 and bar 10. The fifth row is brought into line by a key 2, operating in the same manner as key 1, and the sixth row by simultaneously depressing key 2 and barlO.

In order to limit the amount of lifting of the rear end of guide is with respect to the bar (Z, an adjustable set-screw 12 passes loosely through an opening in the plate (Z and engages the member 8, the head of the pin engaging the plate (Z, and thus limiting the movement of said guide.

In order to prevent any undue raising of the type-bars as they ride up the incline 8, a transverse roller is provided, bearing upon the upper edges of all the type bars and guided at its ends in vertical slots in guides g, secured at the sides of the frame.

Springs 0, connected with the ends of the roller, tend to hold it depressed. I prefer to make the upper edges Ofthe type-bars inclined, as shown.

The platen is indicated at c, rotatably supported by the carriage b, which is of angular shape in cross-section, comprising, as shown, a horizontal base portion and a vertical back portion and having end portions Z), in which the platen is journaled. The baseportion of the carriage is provided with a longitudinal groove or channel 1 1, which is engaged by a rib or flange 15 on a cross-bar 16, supported by the side walls of the frame or case. By this means the carriage is guided accurately in its reciprocating movement.

The vertical wall of the carriage bears against a bearing-plate 18, which is adjustably carried by the frame-bar 17, so that by moving the frame-bar forward or back the carriage will be slightly tilted, and hence the platen moved toward or from the type. The adjustment is effected by connecting the bar 18 to the frame-bar 17 by links 19, which maintain it always parallel to the line of print,

and locking-screws 20, which secure the bar, rigidly in any position to which it may be adjusted.

In order to hold the paper pressed firmly against the platen, leaf-springs 13 are provided which partially encircle the platen and which are slidably supported by the carriage, whereby they may be moved toward and from each other to accommodate various widths of paper.

In order to propel the carriage as the keys are depressed, I provide the following described mechanism: A band or ribbon 22 is connected to one end of the carriage, as indicated at 21, and is then carried around a drum or pulley 23 and connected to the opposite end of the carriage, preferably by a yielding connection, as indicated at 24:, so that as said pulley is rotated the carriage will be moved a corresponding degree. Two additional pulleys or

drums

25 and 26, the latter being larger than the former, are rigidly connected to the pulley or drum 23, and over the drum 25 passes a brake-band 27, one end of which is rigidly secured to the base of the case, as indicated at 28, while the other is yieldingly connected at 30 through a spring 29.

In the lower part of the case is located a frame composed of

bars

31, 32, 33, and 34:, which is pivotally mounted upon brackets or standards 35. The bar 31 is wide enough to extend under all the key-rods and is designed to be pressed down thereby as the keys are depressed. The amount of depression may be regulated by the set-screws 10, 41, and 4:2, carried at the lower ends of the type-rods. The bar 31 is kept normally elevated by a spring 36, which may be in the form of an elastic passing over the end of bar 33 and having its ends secured to the floor of the case, as

' shown.

To the end of the frame member or bar 33 is connected one end of a band 38, which passes over the dr um.26 and is connected at its opposite end to the case through an elastic connection, such as spring 39. By this arrangement as the bar 31 is depressed and the frame rocked the upward movement of the rear end of bar 33 will loosen band 38; but the slack will be taken up by spring 39.

The pulleys or drums will be prevented from turning, however, by the brake-band 27 on pulley 25, owing to its rigid connection at 28. Thus the carriage remains stationary as the type-bar is moved forward to print the letter. On the release of the key and the return of the bar 31 to the position shown in Fig. 1 the downward movement of the rear end of the bar 33 will draw down upon the end of band 38, and the friction of the band upon the pulley or drum 26 will be suflicient, due to the difference in size between

pulleys

25 and 26, to overcome the friction of the brake-band upon pulley 25, and hence the carriage will be moved one step or space while the type-bars are at rest.

It will be understood that the movement of the carriage will be greater or less according to the extent of movement imparted to the rocking frame, of which bar 33 is a part.

The amount of this movement is regulated by IIO the set-screws 40, 11, and 42, above referred to, and it will be noticed by this arrangement the carriage may be moved a space equal to the width of the letter printed, being moved a greater distance, for example, when an n1 is printed than where the i key has been struck.

\Vhile the above operation would be true with the parts in the position shown in Fig. 1 in printing the uppermost row of characters, it will be observed that when bar (Z is raised to print other rows the key-rods will be raised so as to carry them out of reach of the bar 31. It is therefore necessary to provide other means for spacing when either keys 1 or 2 are depressed. This is accomplished by providing an arm 43, which. is located directly under the keys 1 and 2 and designed to be struck by the lower ends 4L7 thereof. The arm 43 is pivotally connected at one,end to the case and'inclines rearwardly and upwardly and is provided at its rear end with a pin 45, which rests on a pin 46, projecting from the bar The arrangement of type on the third, fourth, fifth, and sixth rows is such that it is supposed that either keys 1 or 2 will be depressed with every letter of these rows that is printed. Consequently when either key 1 or 2 is depressed its lower end 47 will contact with arm 43 and through its connections, as above described, depress bar 33 and shift the carriage one space, as hereinbefore described.

It is desirable to provide auxiliary means for controlling the width of space, and to ac complish this I provide a wedge 48 beneath the rear end of bar 33, which wedge is mounted upon a slide 49. To the opposite ends of this slide are secured the cords 50, which pass around pulleys 51 at the rear corners of the case and thence forward and around pulleys 52 at the front corners. lead to a slide-piece 53, which may be moved transversely of the case by a lever handle or projection 53*. (See Fig. 1.) It will be readily seen that as the wedge is moved under the end of bar 3 a greater or less distance a greater or less movement will be permitted to the said bar, and hence the space will be greater or less.

In order to space between words, I provide a key 55, connected by a rod 55 with the bar 33, as shown more clearly in Fig. 9.

The line-space mechanism is shown more clearly in Fig. 4. This includes a sliding block 57, guided by the vertical wall of the carriage and operated by a button 59. To the block is secured one end of a band 56, which partially encircles the platen and has its other ing it in moreor less the amount of movement may be varied, and hence the line-space changed.

In order to return the carriage to initial position for the commencement of a new line after a line has been finished, I provide the following means: To the under side of the block 57 I secure the end of a wire or cord 62, which then passes under a pulley 63 on the carriage and across to and around a pulley 64 at the side of the case.

slide 65, guided on the side of the case, by

From this point they Thence it leads toa drawing on which the carriage may be restored to initial position, it requiring a eomparatively slight pull to overcome the friction on the space mechanism. 7

It will be seen that the drawing back of the :arriage simultaneously rotates the platen,

owing to the connection of the cord to the I claim is 1. In a type-writing machine the combination with the carriage, of a carriage-propelling drum, a band passing around said drum and having its ends connected with opposite ends of the carriage, a lirake-drum connected with said carriage- 'n'opelling drum, a brake-band contacting withsaid drum and having one end rigidly connected with the frame and the other yieldingly connected thereto, an operatingdrum connected to said first-named drums, a band contacting with said operating-drum and having one end yieldingly connected to the frame, and an operating member connected to the other end of said band, substantially as described.

2. In a type-writing machine the combination with the su1: porting-frame and carriage of a carriage-propelling drum, a band passing around said drum and having its ends connected with opposite ends of the carriage, a brakedrum connected with said carriage-propelling drum, a brake-band contacting with said drum and having one end rigidly connected with the frame and the other yieldingly connected thereto, an operating-drum connected to said first-named drums, at band contacting with said operating-drum and having one end yielding-l y drum, a brake-band contacting with said drum and having one end rigidly connected with the frame and the other yieldingly connected thereto, an operating-drum connected to said first-named drums, a band contacting with said operating-drum and havlng one end yieldingly connected to the frame, and a key-operated rocking frame connected to the other end of said band, and independent space-controlling means, substantially as described.

4. In a type-Writing machine the combination With the carriage of a carriage-propelling drum, a band passing around said drum and having its ends connected With opposite ends of the carriage, a brake-drum connected With said carriage-propelling drum, a brake-band contacting With said drum and having one end rigidly connected With the frame and the other yieldingly connected thereto, an operatingdrum connected to said first-named drums, a band contacting With said operating-drum and having one end yieldingly connected to the frame, a key-operated rocking frame connected to the other end of said band, a Wedge-piece located beneath said rocking frame to limit its JEAN FRANQOIS DAVID.

Witnesses:

THOS. N. BROWNE, MARIN VAOHON.