US1347632A - Typewriting-machine - Google Patents

Description

J. B. HOLDEN. TYPEWRITINGMACHINE.

APPLICATION FILED oer-s, 1919.

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J. B. HOLDEN.

I TYPEWRITING MACHINE.

APPLICATION FILED on. a. 1919.

1,347,632. i PatentedJuly27,1920.

2 SHEETS-SHEET 2- wiTNEssE'i INVENTUR f w Asa/MAN fi. J. W m, Mil/44b Hi5 ATTURNEY UNITED STATES I PATENT OFFICE.

JOSEPH B. HOLDEN, OF SYRACUSE, NEW YORK, ASSIGNOR TO REMINGTON TYPE- WRITER COMPANY, OF ILION, NEW YORK, A CORPORATION OF N'EW YORK.

TYPEWRITING-MACHINE.

Specification of Letters Patent. Patented J l 27 1920 Application filed October 8, 1919. Serial No. 329,285.

. is a specification.

This invention relates to improvements in the universal bars and universal-bar frames of typewriting machines, the object being to simplify their construction and facilitate their satisfactory operation. The invention is represented herein as embodied in a universal-bar frame on which the printing key levers or key controlled devices of a machine act to operate thecarriage escapement dogs and ribbon mechanism, the latter not being shown in the drawings. The invention consists of the universal bar and universal-bar frame which are described and claimed below.

In the accompanying drawings, in which like numerals designate like parts of different views,

Figure 1 is a side and sectional elevation of parts of a. typewriting machine which contains the invention;

Fig. 2 is a longitudinal section of detached parts of the machine, one of them being the universal bar frame;

Fig. 3, a perspective of a fragment of the universal-bar frame; and

Fig. 4, a lan of the universal-bar frame and some ot er parts, and a horizontal section of some parts, of the machine, the plane of the section being indicated by the broken line 20-00, Fig. 1.

The frame of this machine comprises side plates 1 and 2 which are alike in outline, the

full outline of the right side plate 1 being shown in Fig. 1. These plates are fastened by screws to a casting (not shown) which includes the type bar segment, the screws passing through the holes 3 in plate 1 and through similar holes in plate 2,

late 4 is fastened by screws 5 (Fig.' 1) to ugs (indicatedby dotted lines) which are parts of the side plates, and the front comb plate 6 is fastened by screws 7 to the lugs 8 whichare also parts of the side plates. The rigid frame composed of the above mentioned parts, fits in a sheet metal casing The top t) which covers the side plates and extends in front of the keyboard and is attached by screws to the side plates. This casing includes at the bottom thereof and on all four sides an inwardly extending flange 10 to which are fastened the pads 11 on which the machine stands.

The type action key levers 12, and the levers 13 attached to the space bar 14, pass through guide slots in the comb plate 6 and are pivotally mounted at their rear ends where they are notched in the bottom edges to form seats to receive a rod 15. This rod, which extends nearly across the machine, is supported by an angular cross bar which constitutes a rear guide comb and is about as long as the rod and is composed of the part 16 (Fig. 1), and part or foot piece '17 (Fig. 4). Only portions of the bar and rod, near their ends, are shown in Fig. 4. The part 16 is slotted to form tongues 18 bent alternately in opposite directions to form between the two sets of tongues a channel in which the rod 15 isseated. The part 17 projects forward from 16 and over the rear portions of the levers and is fastened to the under side of the aforesaid casting by screws passing. through the parts 17, one of the screw holes 19 being shown in Fig. 4. Each of the levers passes through a slot between a pair of adjacent tongues 18, the levers being spaced apart by said tongues.

This machine comprises a shift frame, which supports the platen carriage and which is movable backward and forward, from and to its normal position, so to shift the platen as to enable both lower and up per case characters to be written or printed by the operation of type bars pivoted in the aforesaid type bar segment and connected with the type key levers, the printing point being at the top of the platen. The shift frame, which fits loosely between the side plates 1 and 2, is composed of the side bars 20 and 21,the rearwardly projecting arms 22 and 23, and the'cross bar 24. The side bars 20 and 21 are pivoted at their front ends, b the pivot screws 25 and 26, to the arms 2 and 28 fast on the rock shaft 29,

which is supported at its ends by the side plates 1 and 2. The shift frame also includes plates 30 and 31, said plate and arms 22 and 23 being fastened together by screws, and from said plates 30 and 31 project the lugs 32 and 33, each lug being bent down from its plate. Links 34 and 35 are pivoted at their upper ends to these lugs by shouldered screws 36 and 37, and these links are pivoted at their lower'ends by screws 38 and 39 to the side plates 1 and 2. Hence, the shift frame hangs at its front end from the rock shaft 29, and is supported at its rear end by the links 34 and 35, and is movable backward from the position in which it is shown in Fig. 1, that position being its normal position. The grooved rails 40 and 41 rest on and are fastened to the arms 22 and 23 of the shift frame and the angularly bent base 42 of the carriage is supported on these rails by balls as represented in Fig. 1, the normal position of the platen 43 being that indicated in Figs. 1 and 4. The machine contains a shift key lever and mechanism to enable the shift frame to be actuated by it, but they are not shown herein.

When the shift key is operated the shift frame is forced back, and when the key is released the frame is restored to its normal positionby springs located under the arms 22 and 23. One of these springs 44 is shown in Fig. 4. It is attached at one end to the pin 45 fixed in the side plate 1 and at its other end to a lug 46 fastened to the plate 30.v The other spring .is attached to a pin and lug similar to these, the pin being fixed in the side plate 2 and the lug being fastened to the plate 31. A feed rack 47 is attached to the carriage and normally is engaged by a feed dog, a spring (not shown) being connected to the carriage and tending to pull it to the left. The feed dogs, 48 and 49, are supported by the block 50 fastened on the rock shaft 51 which is mounted on the threaded pins. 52 and 53., These pivot pins pass through and are locked by nuts to the side bars 20 and 21 of the shift frame. The arms 54 and 55 are fast on the rock shaft 51, and the coiled springs '56 and 57, attached to them and to pins projecting from the sides of the shift frame, tend to pull the ,front ends of the arms downward and keep the stop finger 58 in contact with the rack bar 47, the stop finger being fastened to the block 50.

The mechanism above described constitutes parts of a machineof the character disclosed in the application of A. W. Smith,

-Sr. No. 326,705 filed Sept.27, 1919, and

the invention claimed herein, and embodied 1n the universal bar andumversal-bar frame shown in the drawingsof this application,

was made especially to improve that machine. A.novel feature of the universalbar frame, made as it is shown herein, is the universal .bar, but the frame claimed may include universal bars of different forms,

while the particular universal bar shown, which is separately claimed, may be used in place of a common universal bar and either when it does or when it does not form part of a frame.

The illustrated universal bar frame is composed of a front cross-bar, which is the novel universal bar, of a pair of side bars extending backward from the front cross bar, and of a rear cross bar connecting the 'side bars together, the whole frame being of a single piece of sheet metal. The universal bar, constituting the front cross bar, includes the part 59, or bar proper, and the series of tongues, fingers or contact devices 60 each having the shape of a short half tube of approximately cylindrical form so as to present upper curved contact faces for coiiperation with the key 1e vers. The bar is curved transversely from end to end of the series of devices 60 in order to stiffen it but it.is flat at its ends where it intersects the side bars 61 and 62. The rear cross bar 63 is also flat at its ends where it intersects the sidebars and is stiffened by the downwardly turned marginal portions or flanges 64 throughout nearly its whole length. The metal is bent where the cross bars intersect the side bars so that the lateral facesof the side bars 61, 62 lie in planes that are perpendicular to the length of each cross bar. The pins 65 and 66 are fixed in the side bars 61 and 62 near their rear ends, and in the side bars are holes 67 which are on a line that passes over the cross bar 63. The universal-bar frame is pivotally attached by the headed screws 68 and 69, passing through the holes 67, to lugs which extend downward from the side bars 20, 21 of the shift frame. The shape and location of one of these lugs 7 0 is shown by dotted lines in Fig. '1. pins 65 and 66 lie under and close to the arm-s54 and 55 projecting from the rock shaft 51, and the spring 71 attached to the shift frame and universal bar frame tends to raise the universal bar and keep the humpsor stops 72 on the bars 61 and 62 in contact with the fixed steps 73 and 74 which ar'eextensions of the plates 30 and 31.

'It will now be perceived that the platen,

erated, and that the key levers and spacing levers, mounted on the rod 15 attached to the segment, do not shift.

is depressed the key \Vhen a type ke lever acts on one o the contact devices 60,

and pushes the universal bar downward;

As the universal bar" frame then turns on its pivots 68 and 69. the his 65 and 66 raise the the front ends oft e arms 54 and 55 The and rock the shaft 51 together with the" block 50 and the feed dogsso'that the dog ment with the rack bar 47. As soon as the key is released the springs 71, 56, 57 restore the universal bar and block 50 to their normal positions. The platen carriage is drawn a letter space distance to the left during the upward movement of the key, the action of the dogs on the rack being like that of well known fast and loose feed dogs.

It will be understood that the key levers extend forward different distances from the rod 15 and in order to equalize the action of all of the type action key levers on the universal bar, each contact device 60 may be adjusted to the requisite height by bending it so that the key lever which acts on the contact device will depress the universal bar to the proper extent, the projection 75 being the portion of each printing key lever that coacts with its associated contact device.

The universal-bar frame described is light yet especially rigid and satisfactory in its action, and the stamping and bending operations required to produce it are easily and quickly performed. The form of the universal bar itself, including the contact devices, imparts peculiar novelty and utility to this feature of the invention.

It will be noted that the part 59, or bar proper, of the universal bar, is bent into the form of a longitudinal section of a cylindrical tube to provide stiffness, and that the contact devices or tongues 60 have the general form of a continuation upward and forward of the cylinder of which the bar 59 is a part. The construction is such that the part 75 of the key lever comes down on the upper curved part of a tongue 60, the point of contact'being directly above the stiffened part 59 of the bar. This makes a much better construction than it would if the tongues 60 merely projected forward or rearward from thepart 59 for in the latter event the line of pressure downward would come either forward of or to the rear of the part 59, and said pressure would tend notonly to bend the bar 59 downward at its middle but would also have a torsional effect, tending to twist it about its longitudinal axis, with the result that the yield due to the pressure of the key would be considerably increased, as would also the stress on the bar 59, the torsional yielding and the torsional stress being in addition to the bending. It will also be observed that each of the tongues terminates at its forward end a little above the forward edge of the part 59, leaving a horizontal space 60 between the tongue 60 and the bar 59. This space is in such a position that in case it is necessary to bend the tongue 60 upward it can be very readily done by the insertion of any fiat tool, such as a screw driver, and by giving a slight twisting motion to the tool. The tongues can of course be readily bent down- Ward with a pair of pliers, and neither of these methods of bending would bend or in any wise distort the bar 59 because the whole force exerted on the tongue 60 would find its re-action against said bar 59 in the immediate vicinity of the tongue that was being bent. If these tongues were bent by a pair of pliers taking hold of each tongue without at the same time taking hold of the bar 59 itself, the bending of the tongue would tend front ends and the forks 80 and 81 at their rear ends, these forks engaging with the pins 82 and 83 fixed in and projecting from the arms 54 and 55. The space bar leve rs 13 have projections which pass over the arms 7 8 and 79, one of these projections 84 being shown in Fig. 1. \Vhen the space key is depressed the feed dogs are rocked by the action of the. projections 84 on the arms 78 and 79, but the universal bar is not then moved. Obviously, if desired, the space bar levers might be formed and adjusted so as to make them act on the universal bar and on contact devices like those above described.

Various changes can be made in the details of construction and arrangement without departing from my invention.

What I claim as new and desire to secure by Letters Patent, is:

1. In a typewriting machine, a universalbar frame comprising a front cross bar, a pair of side bars extending backward from its ends, and a rear cross bar connecting the side bars together, the whole frame being composed of a single piece of sheet metal bent where the cross bars intersect the side bars, and the lateral faces of the side bars being in planes that are perpendicular to the length of each cross bar.

2. In a typewriting machine, the universal-bar frame defined in claim 1, the front cross bar being the universal bar including a series of contact devices formed on and projecting from the bar proper.

3. In a t'ypewriting machine, a universal bar composed of a single piece of sheet metal and including a bar proper and a series of contact devicesprojecting from it, the bar being curved transversely from end to end of theseries of contact devices and each contact device having the shape of a short half tube.

4. A universal bar made of a strip of sheet metal having a series of integral contact tongues projecting from an edge thereof, the bar proper being made of a form to give stiffnessagainst the pressure of levers acting on the tongues, said tongues being individually adjustable by bending them and being of such form that the parts thereof that receive the pressure of the levers stand directly opposite the still cross bar or bar proper.

5. A universal bar consisting of a strip of sheet metal bent into the form of a longitudinal section of a tube and having a series of integral contact tongues projecting from one edge thereof and bent over the strip and approaching the opposite edge thereof, this edge being on one side and the tongues on the other of a narrow space into which a tool can be inserted to adjust said tongues vtongue being located in relation to the strip so that the line of force due to the pressure of a lever against the tongue passes through I the curved strip or bar proper.

Signed at Syracuse, in the county of Ononda a and State of New York this 4th day of 5a. A. D. 1919.

JOSEPH B. HOLDEN.

Witnesses:

Amos J. BRONSON, W. W. BRAND.

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