US1005780A

US1005780A - Spring-tension regulator.

Info

Publication number: US1005780A
Application number: US43783208A
Authority: US
Inventors: Joseph Raber
Original assignee: DALTON ADDING MACHINE CO
Current assignee: DALTON ADDING MACHINE Co
Priority date: 1908-06-11
Filing date: 1908-06-11
Publication date: 1911-10-10
Anticipated expiration: 1928-10-10

Description

J. BABE-R;

SPRING TENSION REGULATOR.

APPLIUATION 11pm) JUNE 11 1903.

1,005,780"; PitentdOct. 10, 1911.

. -To all whom it mag lineman:

. zen of theUnitecl State Blufl, Missouri. haven-m :UNITEDJSQ TEiP FF JOSEPH RABER, OF POPLAR BLUFF, MTSSOURI, ASSIGNOR'TO DALTONADIDIhTG MACHINE COMPANY, OF ST. LOUIS, MISSOURI. A CORPORATION OF MISSOURI.

SPRING-TENSION REGULATOR. v

Be it known thatlifJosErn Risen, a citi- 'esiding at Poplar fented a new and useful Spring-Tension?egulator,' of jtythich the, following is aspecifi g'a tion.

.I w. i increased or reduced at wallfand ltCQIlSIStS of the novel construction, cqn'lbinatiogi and arrangement f'i'aarts herein shown, de-.

scrlbed and claimed. I I One ob ect of the inventlon ist'o produce me'ans op'erable in""connection with sprlngs, of either-the retractlle or expansion type, to ncrease or reduce the power of such springs to any desired extent.

Another object is to produce an element adapted to encircle the spring and having projections, such asth'reads, to project between the coils of the spring whereby, when said element is rotated, the spring willbe expanded or contracted as required to adjust the spring to any desiredpower of expansion or contraction. In any construction the regulating means constitutes the attachment for one end *o'fi the spring. A device of this charactei' is 'yery useful .in many combinations, su'clr as' wfl-ith the spring-actu-v ated' parts of'all' kindsfot machinery, en ines;inotors,"sewing machines, etc., and in typeiyiiters' in which embodiment I have shownit, for regulat ng the touch and rebou ndhof the. key levers, typebars, etc., after operation; and another object of the invention isto produce improved means for f use in such combinations whereby the tension 'oftlre restoring springsiof the difierent partsmay be adjusted uni-iiormly to any desiredwdegree otexpanslve or retractlle power. In ithe" accompanyingadrawing forming part of this specification", Figure 1 is M1 illustration of a train of typewriting mechanism showing my invention embodled therein. Fig. 2 is an enlarged View partly in section illustratingthe regulating means.

Fig. 3 is an end View ofthe hollow element which" encircles the spring and const tutes the adjustingora'egulatmg dev1ce. 1 1g; 4

is a view or the tensioningdevice appliedi {I t M M .draWm'gJ-Mth screw-threadsnit as obv1ous that fiD YPI'Oj-QCUOIIS for engaging the convo Spectficatiim of Lettersratent. Patented Oct."10-, 1911. Application filed June 11, I

1908. Serial No. 437,332.

the embodiment shown; is a i'etractil e An eye or hook 2 is formed on one end of the sprmg, and is intended to be engaged .with a similar eyefor hook 3 on the member 4 which is the member to begactuatejd by the I t r spring. Specifically themember. 4 is a ThlS invention relates to springtensionv regulators of the type iriiwhich the the h or actuating power of the spring maybetypewriter key-lever which is .pivqted at 5 lags a buttonor terminal. 6. for well "understood"purposes. ,A link 7 connects the end of the lever 4 with a type-b21138 which, has pivotal extensions Qoperating in bear- .type-bar efi'ectivelyto cause; the type 11 at theend thereof to record on paper supported by or against the platen 12. In this embodiment of the invention the spring 1 is connected to the key-lever 4 intermediate of its pivot 5 and the link 7 so that the spring acts to return the type-bar, and thereby the entire train, to idle position after each operation. f

13 indicates a stationary member whereby one end of the spring is held. An internally threaded member 14 is held-in a hole in said member 13.- The spring 1 screws into the member 14, the threads or projections 15" therein engaging with the convolutions-of the spring. These projections or. threads are preferably'of attenuated form so asto en-. gage snugly between the spring coils, though itis obvious-that they may be of any kind or, form which will engage-'w'ith the spring to operatez-as presently described. A flange 16 on the, member l tibears against the face of the support 13 'to-prevent the member 14 from beingdrawn through the hole in which it mounted. The periphery or edge'of the flange '16. is preferably polygonal so that a wrench may be engaged'therewith totturnthe member 14. lt-is'robvious that turping the member 14in one direction will extend or draw out thespring l, and consequentlyincrease the tension thereof, While rotation of the member 14- in the opposite direction will-*contract the spring andreduce the -;ten sion thereof fbothradjustments being eflected while the spring isin engagement with the lever. and without winding tighter or un- -windin'g the spring "coils to "any extent.

I hile the member 145 isshown-inthe ings in a supporting bracket-1 0,. Depression of, the front end. of the lever't operates the a The bearing surface of the flange 16 may be corrugated or spotted, as shown at 17, the better to hold it against accidental or undesirable turning. If desired a matching or enga ing element 18 may be formed on or attached to the member 13, though under ordinary conditions these features are' probably unnecessary.

I An obvious modification of the device would be to apply it to a push or expansion spring. In Fig. 4 I have shown such an adaptation or modification of the invention. In this adaptation the spring, indicated by 19, is ofthe expansion type, and screws into threadedengagement with the member 20 which is provided with internal threads 21 of suitable pitch and contour. The member 20 is provided with a flange 22 which'engages with an element 23 on the support 24 25 to prevent accidental turning or loosening of the said member 20. It will be noted that this adaptation or modification of the invention consists in a reversal of the member 14 (Fig. 2) so that the flange 16 (Fig. 2)

will be pressed or pushed against the support by the expansion power of the spring instead of being drawn against'the support by .the retractile power of the spring. The

member 20 (Fig. 4) may be manipulated,

' I 55 the sameas the member 14 (Fig; 2), eflec-.

tively to adjust or regulate the tension of the spring to any. desired extent, thereby enabling the user to adjust a series of such 5 rings to an exact and uniform tension t roughout'. In the case of expansion springs any suitable spring support or holder, such as shown at 25, may be utilized to connect the springto the actuated element.

It will be noted that the important funckeysywhere exact uniformity of tension (to regulate the touch) is desired. By this device the touch of all the keyscan be regulated with exactness, thereby enhancing the value lit-these features.

I am aware that revoluble adjusting members have been used in connection with springs; but none which can be operated to adjust a spring withthe desired accuracy and exactness from the minimum to the maximum. Y I V I am also aware that there may be many variations in theconstruction, combination and arrangement of the parts cpmpriging the invention without in the least departing 66 from the spirit and scope of the invention.

distant from said threaded member and the opposite end screwed into said member, substantially as specified.

2. The combination of a support having I a hole therein, aihollow member mounted in said hole and being revoluble with respect to said support, a flange on one end of said member bearing against said supportin idle position, and a spring of the helical type having one end supported at a point distant from said hollow member and its opposite end extending into and connected to the interior of said hollow member, substantially as specified. 3. The combination of. a support havin v a hole therein, a member revolublymounted in said hole in said-support, a projection'on i said revoluble member in engagement with said support in idle position, a helical spring having one end connected with said revoluble member and the oppositeend supported remote therefrom, and means hold- Ing said revoluble member against accidental rotation, substantially as specified. 1-00 ft. The combination of a support, a coil spring having one end supported remote from said support, a tubular member held permanently against said support and en circling several coils of said spring connection between'said support'and tubular member whereby sald tubular member will be held from accidental displacement, and threads in said tubular member engaging with thecoilsiof said'spring, substantially as specified.

5. The eombinationtof a support, a member revolubly supported by said sup ort, means holding sa d revoluble member om becoming disengaged from said support, a helical spring having one end connected with said revoluble member and the opposite end supported remote therefrom, and means holding said revoluble 'member against accidental rotation, substantially as 0 specified.- i

6. The combination witha spring of a support, an internally-threaded member encircling and engaging said spring, bearing against said support, and being operable effectively to vary the tension of said spring, and means holding said member, in position against said support, substantiallylas specie I 3 I 7. The combination with a spring, of a support, and a hollow member having interlocking connection with said support and being held by such connection. from becoming displaced, said hollow member encircling and engaging a part of said spring, and being operable to vary the tension of said. spring, substantially as specified.

8. The combination of a support, a spring having one end supported remote from said support, a tubular member incasing a part of said spring, bearing against said support, "and being operable effectively to extend or compress said spring to any desired extent, and means preventing displacement of said tubular member from its proper position against said support, substantially as speci- 9. The combination with a spring, of a support, a hollow member incaslng part of said spring and extending into said support said hollow member engaging a ainst said support, substantially as specific 10. The combination with a spring, of a support having a hole therein, a hollow member incasing a part of said spring and ex tending into said hole effectively to prevent said member from moving laterally on said support, a pol gonal flange on oneend of sald member aving a corrugated surface bearing against said support, and an element on said support arranged to engage said corrugated surface effectively to prevent accidental rotation of said member, substantially as specified.

I In testimony whereof, I hereunto afiix my signature to this specification this 4th day of June, 1908, in the presence of two witnesses.

JOSEPH RABER. [L.'s.] Witnesses J. H. Hoovnn, Ner'rm WINSTON.