US1018986A - Type-bar mounting. - Google Patents

Description

M, PFAU. TYPE BAR MOUNTING.

APPLIOATION FILED A173. m, 1911.

1,018,986. Patented Feb. 27, 1912.

INVENTOR MAX PFAII, or woons'roox, 'LLINoIs, ASSIGNOR T0 'rnn nmnnso v rYrEwnITEn 00., or woonsrocx, ILLINOIS, A CORPORATION or ILLINOIS.

' Turn-Ban. MOUNTING.

Specification 0: Letters Patent. t te 27, Application filed April 14, 1911. Serial No. 621,101

To all whom it may concern:

Be it known that I, Max PFAU, a citizen of Saxony, Germany, residing at Woodstock, in the county of McHenry and State of Illinois,'have in rented certain new and useful Improvements in Type-Bar Mountings, of which the following is a specification.

The present invention relates to a form of mounting used in positioning a. type bar upon the body of a typewrit-in machine, and to the arrangement of t e tension mechanism utilized in returning the typebar to normal position. v p

The objects of the present invention ar'e, to provide a mounting. for, the. type bar which will insure against a loosenmgaind" justing this spring tension. 'Anda. still further object of the invention is to provide a rail in which the members are mounted which adjust the tension of the spring controlling the movements of the type bar, and to so position this rail that it will serve as a reinforcement for the type support ng frame.

The invention-further consists in the features of construction and the combination of parts hereinafter described and claimed. In the drawings, Figure 1 -is an elevation of a type supporting frame of'the present invention, showing type bars connected thereto which are equipped with the devices of the present invention; and Fig. 2, a view showing a type bar with the appliances. of

the present invention thereon, and showing,

in sections, the rails in which'said bar is mounted.

In the typewriter art, it is necessary to provide a framework in which the type bars are mounted, and it is necessary to so, mount the type bars within the framework that accommodations may be made for the subsequent wearing of the bearings, so that loosenin of the bar in its mounting will not resu t. Thisloosening is objectionable for several reasons, among theprincipal be ing that-it results in a rattling of the bearlng urlng the operation of the machine, and also results in an incorrect movement of the bar, which may cause the type to misaline in the writing operation. It-is further necessary to provide some tension acting means for returning the type bars to normal position after they have been thrown forward and have'completed the writing operation. It is deemed expedient to provide some means fonadjusting this spring tension so that the bar may be returned to its normal position at the proper speed. If too great aspring tension is placed upon the bar, it mayresult inthe bar returning before it has fully completed its stroke, and hence the character is-notimprinted. If the bar is returnedtoo slowly, it may result in the .next successively acting bar striking 'the former bar before it returns, and hence a piling of the type result. It is, therefore, essential, in order to properly perform the writingioperation, to adjust the spring tension .on the type bar sons to give wit the proper speed of return to normal position.

Referring to the drawings, there 1s shown a type supporting frame 3, which may be I of any suitable form and size, the particular form shown being for illustrative purposes only. The type bar frame, as shown, consists 015 an upper rail 4 and a lower rail 5. Mounted-within these rails are a series of type bars-6, which also may be of any suitable size and formation, the particular style shown being merely for illustrative purposes. The type bars are provided with an upper cone bearing 'i and a lower cone bearing 8, each'of these cone bearings being mounted within suitable recesses within the respective rails. I

The use of a cone bearing in a swinging type bar is deemed to be an important item, since by means of this particular form, the wearing away of the hearing within the rail ways maintained firm and rigid; It is, of course, understood in the mechanical art that a cone bearing can be very easily adjusted so as to bring it to a firm seat in the member in which it is mounted.

Each of the iowe cone hearings 8 can be compensated for and the bearing almates in a slottedstem 9; and secured to the lower end of the 'frame 3 is a rail 10, as shown, of -channel formation. Mounted within this rail 10 are a series of pins 11, each consisting of a body portion 12 terminating in a reduced stem 13, the reduced stems each being provided with a notch similar to the notch in the stems 9. body portions 12 are split, as at 1.4, so that they consist of what may be termed leaves 15. The material of which these pins are formed is of such a nature as to give. to the leaves a spring property; that is, they are formed so as to normally extend in a direction divergent from one another, being spread apart at their lower ends.

-The upper flange of the rail 10 is provided with openings 16, through which the reduced ends 13 of the pins 11 extend; and the lower flange of the rail 10 is provided with openings 17, through which the body portion of the pins extends. The leaves 15 of the pins are sprung together when they are inserted within the openings 17, so that they spring against the side walls of said openings and are held against displacement therefrom by spring tension or friction. It will be noted that-the ends of the pins 11 project slightly beyond the rail. This .is to permit of the lower portion of the slot in the body portion extending intoa position where a tool can be inserted therein for the purpose :of revolvingthe pin within the rail 10. The spring tension on the leaves 15 is sufficient tov prevent the pins 11 from becoming displaced'from the-rail l0 and to revent rotative movement of the pins within the rail under ordinary conditions of usage.

Interposed between the adjacent ends of the pins 11.and the stems 9 are tension members 18, which, as shown, are in the form of helically coiled springs having one free end inserted within the slot in the reduced end 13 of the pins' 11. These tension members control the return-movements of the type bars, and they are regulated so as to sion-property in the following manner: A tool is inserted in the lower end of the slot or recess in the body of the pins 11, and the 'in is revolved within the rail 10. The type ars are held against swinging movement during such revolution of the pin. The stem 9 on the ty e bar-will remain fixed and the reducedv end 13 of the pin 11 will be revolved. This, of course, results in the winding up the sprin 18, and hence the increasing of the tensional owers thereof. The pins are held suiiicient y rigid by friction,' so that the ower of the spring will not turn them in t e bearings in the rail 10. If the tension power desired to be decreased, the'pin'll will, of course, be revolvedin a reverse direction. The spring The a property of the leaves 15 issufiicient to hold sa1d-p1ns against revolution simultaneouslyspeed of return movement of the type bar,

and so the greater or less initial strength placed in the spring will determine the speed of movement with which the by e bar is returned, and, as heretofore exp ained, this initial strength can .be determined by an adjustmentof the pin 11. i

It will be noted that in the present con struction all of the screw threaded members for the purpose of regulating the 5 ring tension on .the type bar are eliminat It will be further noted that by utilizing the bar 10, which extends from side to side of the type supporting frame, this bar serves to strengthen and increase the rigidity of the frame.

I claim: I

.1. In combination with a vertically extending swinging type bar, a mounting for said bar, an adjustablemember/spacedaway from the'lower end of the bar and extending approximately parallel therewith, and a tension member having one end attached to the lower end of the type bar and its other end attached to the adjustable member, substantially as described.

2. In combination with a swinging type bar, a mounting for said bar, an adjustable member held by friction against rotative movement withthe bar, a tension member having one end attached to the lower end of the type bar and its other end attached to the adjustable member, and a rail in which the adjustable member is mounted, substantially as described.

3. In combination with a swinging type bar, a mounting for said bar, a frietionallyheld rotatable pin-like member spaced away from the lower end of the bar and held by friction against rotative movement with the bar, and a tension member having one end attached to the lower end of the type bar and its other end attached to the pin-like member, substantially as described.

4. In combination with a swinging type bar, a mounting for said bar, a frictionallyheld rotatable pin-like member spaced away from the lower end of the bar and held by friction against rotative movement with the bar, a tension member having one end attached to the lower end of the type bar and its other end attached to the p'in-likememher, and ,a bar of channel formation in which the pin-like member is mounted, substantially as described.

5. In combination with a swinging type bar, a mounting for said bar, a pin having a split body portion lying below said bar, a

. rail in which said-pin is mounted, the split formation of said pin tending to hold it within said rail by frictional engagement,

said pin having a notched end, and a ten-' 'sion member having one end attached to the bar anl the. other end attached to saidad justing member, and adapted to be wound and unwound in accordance with the movements of the type bar, substantially as descrlbed.

7. In combination with .a swinging type bar, a mounting for said bar, an adjustable member normally held by friction against movement with respect to the swinging movement of said type bar, a tension mem-' her having one end attachedto the type bar and the other end attached to said adjustjustable member is mounted, substantially as described.

8. In combination with a swinging type bar, a mounting for said bar, a split pin, a mounting for said pin, whereby itis held by frictional engagement against rot'ative movement with said bar, and a tension able member, and a rail in which said ad member having one end secured to the pin and the other end secured to the type bar,

substantially as described. p v

9. In combination with a swinging type bar, means for returning the bar to normal position consisting of a coil spring dependmg therefrom, and means for winding and unwinding sald spring to regulatevthe ten tion on said bars, substantially as described.

- MAX PFAU.

Witnessesz D. C. Ali EBB, FRANK WILDER.

Images