US1189170A - Type-writing machine. - Google Patents

Description

0. PETERMANN.

TYPE WRITING MACHINE.

APPLICATION FILED AUGA24, 1914.

1 1 89, 1 70. Patented June 27, 1916.

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O. PETERMANN.

TYPE WRITING MACHINE.

APPLICATION FILED Amuhmu.

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OTTO PETERMANN, OF GBOTON, NEW YORK, ASSIGNOR TO CORONA TYPEWRITEB COMPANY, INCORPORATED, A CORPORATION OF NEW YORK.

TYPE-WRITING MACHINE.

Specification of Letters Patent.

Patented June 27, 1916.

Serial No. 624,318. Divided and this application filed August 24,

1914. Serial No. 858,274.

To all whom it may concern:

Be it known that I, O'r'ro PETERMANN, a citizen of the Republic of Switzerland, and a resident of Groton, county of Tompkins, and State of New York, have invented certain new and useful Improvements in TypelVriting Machines, of which the following is a full, clear, and exact description.

This invention relates more particularly to the universal bar and its cdnnection with other parts of visible or front-strike typewriters, and is a division of iny application Sr. No. (324,318, filed May 1, 1911.

One ofthe principal objects of the invention is to provide a universal bar action in which two bell-crank levers are positively connected by a rod which cooperates with a rocking frame in such a way as to obtain a uniform motion of the frame and its cooperating parts, no matter whether the inner or the outside key-levers are actuated to engage the universal bar.

Another object of the invention is to pro vide a simple rocking frame which is much lighter than the construction ordinarily employed for similar purposes.

A further object of the invention is to provide simple means which can be adjusted to vary the tension of the type-bars and the key-levers so that they may have a quick or a slow return movement and a light or heavy touch given to the key-levers, as desired.

With these and other objects in view, the invention will be hereinafter more particularly described with reference to the ac companying drawings, which form a part of this specificatiom'and will then be pointed out in the claims at the end of the description.

In the drawings, Figure 1 is a longitudinal section, partly in elevation, of one form of machine embodying my invention, showing the parts in their normal position; and Fig. 2 is a rear elevation of the machine showing a part of the machine frame broken away and in section to better illustrate some of the working parts.

- While I show and describe the invention as used in a typewriting machine in which the carriaie and platen are. foldable forward eyboard, it is to be understood that the invention may be used in connection with typewriting machines of various constructions.

The frame 10 has sides 11 between which the key-levers 12 are suitably supported. These key-levers are arranged in groups or banks and each bank has a series of keys 13 at their outer ends. Each key-lever is guided at the rear portion 14 thereof by a comb plate 15 and at its front by a comb plate 16, and extending below the member 11 is a vertical plate 17 to which is attached one end of springs 18, the other end of said springs being secured to the key-levers at the rear of the comb plate 15, there being a spring for each key-lever tending normally to force the inner end thereof downward and the outer end upward. The keylevers, each have a downwardly extending part 19 and an ear or angular portion 20 which is connected to a link 21, one end of which link is coi'mected to one of the typebairs The type-bars 22, one for each keylever, are pivoted. at 23 to hangers 2%, which latter are secured to the rear bar or plate 25 of the machine frame, and each type-bar at the forward end is provided with a typehead 26 on which may be arranged a plurality of cliarartcrs, ini'licating the upper case, lower case and ii gures or otherwise as desired. i a

The type-bars are moved to printing position through the operation of thc key-levers and are adapted to print on the work sheet on the platen 27 in the usual way. The platen 27 mounted upon a carriage 28 and this carriage adapted to move along the carriage bed 2!), on which bed the carriage is supported in any preferred way. The carriage is moved along its bed by a suitable propelling device. as a spring actuated drum 30. As shown,v this drum is mounted under the carriage bed and has a flexible connection, as 31. which passes around a pulley or-idler 32 secured to a bracket on the rear of the carriage bed and the forward end of said flexible connection is attached to a bracket 33, Fig. *2, so that the spring actuated drum will tend to force the carriage along the bed as is usual in typewriting machizys. Thc carriage bed isheld to a support 34 and thissupport comprises two parts, on' the fbldable part of which the carriage bed is mounted, and this part is pivoted at 35 to the other part or normally fixed member of the supp platen and propel ing mechanism may e folded forward so that the platen may rest ,upon the frame 10' to adapt the machine to be made compact for transportation or similar purposes. The support 34 with its carriage is shiftable vertically by the vertically movable posts or slides 36 located at each rear corner of the machine, and these posts are connected together at their lower ends by a transversely extending rod 37, the said rod being connected to'a platen shift lever 38. The lever 38 is pivoted to the transverse rod 39 and ordinarily there are two shift levers, one for the upper case and one for the figures, though only one shift lever is shown, as the extent or character of the shift is not important so far as this invention is concerned and for that reason is not further illustrated.

A rack 40 is secured to the carriage base 41 under the same, and over the carriage bed 29 and adapted to engage the teeth of said rack is a pinion 42. This pinion 42 is secured to a vertically arranged shaft 43 which is held -.torotate in the frame 44 which may be secured to the carriage bed. An escapement wheel 45 is held to the shaft 43 under the frame member 45 of the. frame 44. This wheel has teeth adapted to. be engaged by a fixed dog or tooth, and a loose dog of an escapement, the latter having a lever 46 by which the escapement may be tripped. The parts thus far described may be of the usual or of any preferred construction.

To actuate the lever 46 of the escapement for, letter spacing of the carriage, I employ a rocking frame 47 which is held to rock on the transverse rod 37 and is vertically movable therewith when the support 34 for the carriage and platen is elevated through the platen shift lever 38. This frame is substantially U-shaped and is preferably made in a single piece and comprises a transversely and horizontally extending bar 48 and the verti cal arms or parts 49. The vertical parts 49 are slotted at 50 and passing through said slots is a transverse rod 5]. each end of which rod 51 is held to the upper end of a bellcrank lever 52. The bell-crank levers 52 are each pivoted to "a screw 53which is held in a lug54, Fig. 2, located at a point adjacent to each of the slides or posts 36, said lugs being formed as a part of the machine frame It). Each hell-crank lever is pivotally held at to arms 56 which are formed as a part of the universal. bar 57, the said universal "ar extending transversely of the nmchine and lying over the ears 58 of the key-levers if as .well as he levers of the spacing means. -iniv; f haimay be formed integral with the arms 56 and may be formed as a.

ort so that the carria e,

straight or angular bar as desired. The bar with the arms 56 form a substantially U- shaped frame and has its bar or bar portion 57 guided in the slotted end 58 of a bracket 59 which is secured to the rear frame bar or side 25.

A spring 60 is attached at one end to the transverse bar 51 and the other end of said spring is held to a plate 61. This plate may have a plurality of apertures 62 to which one end of the spring 60 may be attached fo.. varying the tension of said spring, though instead of the spring. being attached to the plate 61 it may be extended over and attached to any other part of the machine.

The purpose of constructing the universal bar and actuating mechanism in the manner shown is to provide a mechanism which will insure a uniform motion no matter which key-lever is operated. This is effected by the rod 51 which extends through the slot 50 of the rocking frame and cooperates with the transverse rod 37 to keep the parts in proper alinement both vat the. lower portion and at the upper portion thereof so that there is less tendency for any of the parts to cant or shift as might occur if such means were not provided. I

It will be evident that when any one of the key-levers is depressed the ear or end 58 will engage the universal bar and this will cause the arms 56 to rock the bell-crank levers 52 on their pivots53, and this through the rod 51 will move the rocking frame 47 on the shaft or rod 37. The rocking frame 47 is provided with a tappet 63 on the upper transverse bar 48 thereof and this tappet at the outward movement of the rocking frame will engage a part of the escapement lever 46 so as to trip the escapement and permit the carriage to move a letter space.

The construction of the key-levers is not claimed in the present application, nor is the key-lever movement as well as certain other features attempted to be covered in this application, as such features form subject matter for separate applications filed by me.

From the foregoing, it will be seen that a simple universal bar action and connection with the escapement mechanism is provided which will insure a uniform movement of the universal bar and other parts so that all parts connected therewith are held in alinement to cause each key-lever whether the center key-lever or any of the outside keylevers to move the universal bar uniformly; that said parts are simple in construction and may be readily made and assembled; and that simple means is provided whereby the tension through the universal bar on the key-levers may be varied to insure a quick gr a slow return movement of the typears.

Having thus described my invention, I

levers, said bar being substantially U shaped, bell-crank levers connected to the universal bar, a rocking frame, a rod con necting the bell-crank levers and passing through the rocking frame, and an escapeinent mechanism operated by the rocking frame.

2. In a typewriting machine, the combination of a support, a carriage adapted to move along said support, a plurality of keylevers, a universal bar, bell-crank levers pivoted to the support and connected to the universal bar, a movable frame, and a rod connecting the bell-crank levers and engaging the frame on opposite sides of the machine.

3. In a typewriting machine, the combination of a support, a carriage adapted to move along said support, propelling mechanism for moving the carriage in one direction for letter spacing, both of which are shiftable into compact relation to another part of the machine when not in use, a plurality of key-levers, a substantially U- shaped universal bar, bell-crank levers pivoted to the support on opposite sides of the machine and connected directly to the universal bar, a rocking frame, a rod connected at its ends to the bell-crank levers and pass ing through the rocking frame and, adapted to be operated as the key-levers are depressed, and an independent mechanism operated by the rocking frame.

4. In a typewriting machine, the combination of a support, a carriage mounted on said support, a transversely-extending rod, bell-crank levers pivoted to the support on opposite sides of the machine and connected to the rod, a substantially U-shaped universal bar having integral parts and connected to the bell-crank levers at each side of the machine, a plurality of key-levers, and an escapement mechanism adapted to be operated by the movement of the rod.

5. In a typewriting machine, the combination of a support, a carriage mounted on said support, a plurality of key-levers, type-bars connected to the levers, a substantially U- haped universal bar extending transversely of the machine having integral parts, an inverted substantially U-shaped rocking frame having its parts integral and connected to the universal bar, and an escapement operated for letter spacing.

6. In a typewriting" machine, the combination of a support, a carriage mounted on said support, a plurality of key-levers, type-bars connected to the lovers, a universal bar having a. horizontally arranged portion and integral vertical portions at the ends of said, horizontal portion, a rod, a rocking frame having a horizontally arranged part and integral vertical parts held to rock on the rod, means connecting the universal bar and the rocking frame to be moved one by the other, a spring normally forcing said bar and the frame in oiie direction, and an escapement mechanism operated by the frameto permit the carriage to move for letter spacing when a key-lever is depressed.

7. In a typewriting machine, the combination with a support, of a carriage adapted to move along said support, key-levers, a universal bar adapted to be engaged by said key-levers, two heii-crank levers pi otally held on opposite sides of the niacl'une, a movable rod connecting the bell craniz levers, variable tension means for forcing the rod in one direction, and an escapement mecha nism adapted to be operated during the movement of the rod.

8. In a typewriting machine, the combina tion with a support, of a carria e adapted to move along said support, keyevers, a universal bar adapted to be engaged by said hey levers, two bell-crank levers pivotally held on. opposite sides of the machine, a rod connecting the bell-crank levers, a device having a plurality of openings, and a spring connect ed to the rod at one end and heid at the other in any of the dpenings of said device to provide a variable tension, and an escapement operated by the rod.

This specification signed and witnessed this 18th day of August A. D. 1914.

OTTO PETERMANN. Witnesses:

BENN Comma, R. BASTON.

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