US1614297A - Typewriting machine - Google Patents

Description

J n. i

a 11 1927 G. F. HANDLEY TYPEWRITING MACHINE Filed August 18, 1926 INVENTOR GJ ZJI J h n; ATTORNEYS Patented Jan. 11, 1927.

UNITED STATES PATENT OFFICE.

GEORGE E. HANDLEY, OF GLENDALE, NEW YORK, ASSIGNOR TO ROYAL TYPEWRITER COMPANY, INC., 015 NEW YORK, N;

Y., A CORPORATION OF NEW YORK.

TYPEWRITING DIACHINE.

Application filed August 18, 1926. v Serial No. 130,001.

This invention relates to a silent key mechanism in which type of mechanism it is desired to actuate the ribbon vibrator without actuating the escapement mechanism for the purpose of writing accent marks or similar symbols above the printed line. The mechanism is illustrated as embodied in the Royal portable machine, but while especially adapted for the same, it is not limited thereto in its application. It is the purpose of the invention to provide a simple and compact mechanism particularly adapted for small portable machines in which the usual key levers through their universal bar will operate the ribbon mechanism by means of an operating member in the form of a rocking arm. The silentkey levers do not operate the main universal bar but have connections to an auxiliary universal bar which has an extension adapted to engage and operate the means for operating the ribbon vibrating mechanism.

The auxiliary universal bar and its associated parts is carried by a bracket which permits the whole to be removed as a unit.

The connections extending from the key levers to this universal bar are readily detachable therefrom.

Other objects of the invention will be apparent from the following detailed description and the appended claims.

In the drawings:

Figure 1 is a fore and aft section of a typewriting machine embodying the invention with the parts shown in elevation.

Figure 2 is a rear view of the bracket and the auxiliary universal bar supported thereby with parts in section.

Figure 3 is a side elevation showing a silent key and a connection therefrom for operating the ribbon mechanism, parts being in section and parts being broken away.

The drawings show a machine frame A on which travels a shifting-carriage B supporting aplaten C. The key levers D are provided with upward extensions 03 which operate front links E connected byshort links 6 to the type bars F. This type action as illustrated, is or may be that used in the Royal portable machine, but may be varied widely so far as the present invention is concerned.

A ribbon G is fed from one ribbon spool to the other in the usual manner and is vibrated by means of a vibrator H. This vibrator is connected to one end of a bell crank lever I pivoted at K and normally held in position by a spring L, the normal position determined by an eccentric screw M. A lever N is pivoted at O to a dependent arm of the bell crank lever and at its front end to a parallel motion link P and its rear end terminates in an enlarged portion R.

The universal bar S is carried on a shaft 8 and the key levers have downwardly and rearwardly projecting extensions d which actuate this universal bar. The rod 8 has an arm T thereon which is connected by a link t to an operating arm or member for actuating the ribbon vibrating mechanism just described. The ribbon vibrating mechanism so far described may be that employed in the Royal portable or it may be of any other desired type so far as the invention herein claimed is concerned.

The operating member U to which the link If is connected is pivoted to the base back of the machine at u and is normally held in position by a spring a. This member U has a curved slot in its rear edge in which engages a bent end t of the link If. The member U also has an offset pin V which bears against the broad end R of the lever N above described.

It will be obvious that when one of the key levers is depressed the universal bar S will be operated and the arm T will be rocked, exerting a pull on the link 25 and consequently rocking an arm or member U and through the pin V actuating the lever N and the remainder of the ribbon vibrating mechanism. It is understood, of course, that the universal bar S also operates the escapement mechanism but this is not necessary to be illustrated so far as the present invention is concerned.

One or more silent key levers 1 are pivoted on the same fulcrum shaft as the remaining key levers and operate their associated type bars by precisely the same form of action. These levers instead of having a downwardly and rearwardly projecting end are provided with an upwardly projecting end 2, which is inclined rearwardly very slightly. To the end of the extension 2 is connected one end of a link 3, the other end of which is connected to an auxiliary universal bar as hereinafter set forth.

A bracket l may be attached to the rear part of the base of the machine by screws 5 and an upstanding portion 6. of this bracket acts as a guide for the links 3. Screws 7 which pass through ears 8 upturned from said bracket engage a rod 9 which acts as a pivot rod and as a trunnion for the auxiliary universal bar. The second pivot rod 10 extends parallel to the rod 9 and tie bars 11 at the ends connect both rods. A central tie plate 12 connecting the two rods is also provided. The links 3 above mentioned have a rear hooked end 13, which engages the rod 10 so that upon an operation of the silent key the pull on the links 3 will rock the rod 10 and connected parts. This auxiliary frame is normally retained in position by a wire spring let attached to the bracket 4 by a screw 15. The central tie plate 12 has an offset extension 16 which projects behind the rocking arm or member U and will move the same whenever the auxiliary universal bar is actuated by a depression of the silent key lever. Since the silent l ey lever has no operative relation to the main universal bar S an operation of these silent keys will merely vibrate the ribbon mechanism without in any way affecting the escapement.

It is to be noted that the connections from each of the universal bars to the member U which operates the ribbon vibrating mechanism are loose connections so that either may be operated without interfering with the other or changing its position. It is also to be noted that the provision of a. separate bracket upon which all parts of the auxiliary universal bar may be assembled and thereafter attached to the frame of the machine as a unit is of importance in enabling the machine to be readily and accurately assembled. It is obvious that the invention may be embodied in machines of widely differing types and that various details of the specific construction can be varied in a great degree without in any way affecting the spirit of the invention which is to be regarded as limited only by the scope of the appended claims.

I claim as my invention:

1. In a typewriting machine having ribbon vibrating mechanism and a rocking arm for actuating the same; a plurality of key levers each having a rearwardly and downwardly directed extension, a universal bar actuated by said extensions, a connection from said bar to the rocking arm, a plurality of key levers each having an upward extension, an auxiliary pivoted frame for engaging and rocking said arm, and connections from said upward xtensions to said auxiliary frame.

2. In a typewriting machine having ribbon vibrating mechanism and a rocking arm for actuating the same; a plurality of key levers each having a rearwardly and down wardly directed extension, a universal bar actuated by said extensions, a connection from said bar to the rocking arm, a plurality of key levers each having an upward extension, an auxiliary pivoted frame for engaging and rocking said arm, and connections from said upward extensions to said auxiliary frame, both connections having loose engagement with the rocking arm to permit its operation by either independently.

3. In a typewriting machine having ribbon vibrating mechanism and a rocking arm for actuating the same; a silentkey mechanism comprising an auxiliary frame, means thereon to engage and rock said arm, a key lever having an upward extension, and a link connecting said extension to said frame.

In a typewriting machine having ribbon vibrating mechanism and an operating member therefor; a silent key mechanism comprising a bracket adapted to be attached to the frame, two tie rods on said bracket one of which serves as a trunnion, a tie plate carried by said rods and having an offset adapted to operate said member, a silent key, and a connection from the silent key to the other of said rods.

5. In a typewriting machine having ribbon vibrating mechanism and an operating member therefor; a silent key mechanism comprising a bracket adapted to be attached to the frame, two connected tie rods on said bracketforming a universal bar, an exten sion from said nniversal bar adapted to operate said member, a silent key lever, a connection from said key lever to said universal bar and an upstanding portion on said bracket serving as a guide for said connection.

6. In a typewriting machine having ribbon vibrating mechanism; a rocking arm for actuating the same, a bracket on the back of the machine on which said arm is pivoted, key levers having rearwardly and downwardly projecting extensions, a universal bar operated thereby, connectionsv between said universal bar and said rocking arm, a second universal bar, silent key levers having upward extensions, connections between the same and the second universal bar, and means whereby an actuation of the second universal bar will rock said arm.

7. In a typewriting machine having ribbon vibrating mechanism including a lever having a broad end; a rocking arm pivoted at the back of the machine, and having a curved slot in its rear side, a pin on said arm in position to engage the broad end of said lever, a universal bar, and connections from said universal bar engaging in said slots, a second universal bar, an extension therefrom adapted to engage said rocking arm, silent key levers, and connections between the same and the second universal bar.

testimony whereof, I have hereunto subscribed my name.

GEORGE F. HANDLEY.

Images