US825911A - Test-indicator. - Google Patents

Description

No. 825,911. PATBNTBD JULY 17, 1906.

. H. KOCH.

TEST INDICATOR.

APPLICATION FILED MAY 4, 1906.

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UNITED STATES vPArinvii` OFFICE.

HENRY KOCH, or NYACK, ,Newv YORK. Y

TEST-INDICATOR.

Specification 4ofvLetters Patent.

Patented July 17, ieoa.

'Applicatiouled Ma'y4,1906. Serial No. 315,184,

To all -wh'om/ it may concern:

ack, in the county of Rockland. and State of New York, have made and invented certain .new and useful Improvements in Test-Indicat-ors, of which. the following is a sp'eciiica--l My invention relates to an improvement in test-indicatorsthat is, an indicator use'd to test and determine the imperfections of inside, outside, or surface work, and also employed for testing lathe-centers or. work'held etween centers and for setting centrally a hole or point in a piece of work under opera'- tion in a lathe or upon a face-.plate-the object being to provide a device of this character which shallbe simple and economical in construction, accurate in its operation, 'and so constructed and arranged as to avoidany liability of getting out of order.

With these and other ends in view the invention consists in certain novel features of construction and combinations of parts, as

will be hereinafter fully described, and point-p ed out in the claims.

, In the accompanying-drawings', Figure 1 is a perspective view of atest-indicatorcom. structed m accordance with my mventionl Fig. 2is a'plan-view of the same with the cover removed. A Fig. 3' is a similar V view showing the parts in an indicatin position. Fig. 4 is a sectional view taken on t e line 4 4 of Fig. 3. Fi 5 is a sectional view'taken on the line 5 5 o Fig. 3. Fig. 6 is a sectional view taken on the line 6 6 of F-ig. 2.

`By reference to the drawings it will be seen 'that the operative parts of the in dicator are contained within a metal box or receptacle A, having',I a removable cover vB extending nearly the length of the box, but leaving a lateral opening C between the end ofsaid f cover B and the `graduated ga e-plateD,'

screwed or otherwisesecured to t e forward end of the box A, and through which opening may be seen the end of the indicating-lever E;

' The forward end of the box A is provided with the tube or barrel'V F, through which extends the rod G, the opposite end of the latter resting in the sleeve H, setin the rear end of the box A. The forward end of the rod G is 'provided with the rounded end o r knob I,

adapted to come into contact withthe surface of the article under test, and also with the disk J, adapted to limit the movement of the thetendency of the spring being to force said rod G outwardly, as illustrated in Fig. 2, so that the end of the indicating needleforlever E will normallyrest at zero on the graduated plate D. 'v

To the forward end of the box is pivoted'at Z, the bell-crank lever L, the short ann Vm of which is bifurcated, as illustrated ,fin Figs. 44' and 6, and straddles the rod G, somewhat re- 8o duced in diameter, as shown at. fn, formin4 two shoulders n. and n?, whereby when sai rod Gis forced toward .the forwardend -by the .spring K said shoulder n, Striking the short' armm, will swingthe longer arm L to its normal ositionthat is, toward one side' of the box asindicated in Fig. 2 -the bifurcation of the arm m at the same time allowing the rod'G to be freely pushed backwardly by' pressure onthe forward'end I without posi# tive engagement of said rod withsaid arm m.

To the rear end of the boxV or rece tacle A is pivoted at o the bent lever or-inf 'eating- Vneedle E, from the under side .of which roi jects downwardly the pine, against w 'ch` latter bears the free end of the lever Land on the opposite side of which pin e bears thefree end -of the spring M,.the o p ositejeud of said spring being secured in the orward end of the receptacle A, the tendenc of said s ring M being to force the-free en of the indicating lever or 'needle E toward the fulcrum of the bell-crank lever L. As the tendency, however, of the spring K'is1somewhat greater than that of the sprin M', the lever or needle E is held in its norma position', as indicated inFig..2.

When reseure is applied tothe endl of thevrod GP bysome imperfection in the arti,- cle under test, the rod G is forced backward] overcoming the tension of the spring whereupon .the tension of th spring M, bearing on the pin e, will imme iately .move the free end of the indicating needle or lever E toward the OPPOSie'end of the graduated "1:55p2

plate D. When, however, the ressure'om 'the end I of the rod G is relieve ,the spring' K\will force'the rod G forwardly, whereby the shoulder n2, striking the shorter arm 'm of r the bell-crank lever, will move said arm forx'zo roo ing against the pin e on the lever E, will -move said indicating needle back to its normal position, as indicated in Fig. 2. In other words,

when the rod Gr is moved backwardly by pres'- sure on the end I, the indicating-needle E will be moved toward the opposite end of the graduated plate D, as illustrated in Fig. 3, and when t e pressure is relieved on said rod the spring K, overcoming the tension of the spring M, will-move the indicating-needle Sgo armP` will force backwardly the rod Gr,A over? Each into itsvnormal position, as indicated in From the foregoing it will be understood that instead of one lever acting directly upon the indicating-needle to vmove the same, as-is vusually the case in indicators 'as now commonly constructed, I simply overcome by 'pressure the tension of one, spring, wherebyto allow theflatter spring to move or operate the indicating-needle, and thereby avoid any and 'all danger of disrupting, breaking, or disarranging the arts when a sudden Jar or blow is given to t erod or lever employed tolengage and move the indicatingleven As it is sometimes required. to employ the indicator in a narrow constricted space or opening between the parts of an article under test, I secure in the back of the case A the 'sleeve H, provided with the slotted rod N, in which is fulcrumed at r a bell-crank lever, the- `longer arm `O of which rests in and projects out be ond the slotted rod N, as' clearly indi'cat in Figs-1, 2, and 3, the end.of the short arm P of which lever fits in a groove or `recess s in the rear end of the rod G. By reason of this construction and arrangement of. arts it be'understood that when the en ofthe arm O is forced inwardly the -short lcoming the tension of the springK and oper- ,ating in every Wayv the same as though; vresfy sure ,were applied to the forward end o the rod? I and resulting 'inmoving lthe indicating 'lever or needle E, as illustrated in Fig.v 3. In suchl instances, therefore, where the contracted space'between the .parts Will not per- Imit of applying the forward end I oi th-e rod to the work the post or rod N may beinserted', bringing the end of the arm O into contact with the Work.v and by movement of which arm' O the'imperfections in said work will be indicated by the lever E. v The under side of the box A may have formed thereon or secured' thereto the threaded post S, whereby to secure the .indicator to a handle or other device (not shown) of any desired shape. or pattern.

Having fully described my invention, what vlI claim as new, and desire to secureby Letters Patent, is-

1. An indicator ofthe character described, i

comprising a casing, a spring-actuated-rod extending through the same, an indicatingl needle, a lever engaging with needle at one end and said rod at the other end, and a spring engaging said needle for moving the same, substantially as described.

comprising a casing, a rod extendingthrough the same, a spring for holding said rod in its normal position, an indicating-*needle pivoted to said casing, a spring secured to said casing and engaging said needle for moving the latter in one direction, and a lever ivoted to said casing and engaging said need e and. said rod* for moving said indicatin -needle in the opposite direction, substantialiy as described.

3. An: indicator of the character described, comprising a casing, a rod extending longitudinally through the same, a springfor hold ing said rod in its normal position, an indicating-needle pivoted at one end ofs'aid casing, the opposite end being free, a spring securedat one end, and at its opposite end* engaging said needle for movin the latter in one direction, and a bell-cranlever', one arm of which engages said needle, and the other arm of which engages said rod for moving said needle in. vtheopposite direction, substantially as described".

4. An indicator of the character described, comprising a casing, a rod extending longitudinally through said casing, a spring for holding said rod in its normal position, an indicating-needlepivoted at one end to said'casing, its opposite end: being free, and provided with a pin, a spring secured to said casing and: engaging the pin on said needle for moving the latter' in one direction, a bell-crank lever pivoted to said casin one arm of which engages said pin on. sai needlefand the other arm of which straddles and engages said rod, whereby to move the needle inthe opposite direction, substantially as described.

5. A test-indicator of the character described. coml rising a casing, a rod extending.

y through the same, a spring for" lo itudinal holling said rod in its normal position, an in dicating-needle pivoted at one end. to said casing, its opposite end being free, and. provided with av pin, aspring securedat one end to. said. casing', Ithe vopposite free end engaging 2. An indicator of the character described,

IOO

said pin, a bell-crank lever pivoted to said casing, one arm of which engagesl said rod., the other arm-engaging said pin, and. a bell.- crank lever pivoted in said casing, one arm of which extends outwardly therefrom, and the other arm of which engages the rear end of said'rod, substantially as described. i

Signed at Nyack, in thel county of Rocklandr and State of 'New York, this 2d d-ay of May, A. D. 1906. l v

HENRY KOCH.

,Witnesses Vieron ACKERMAN, e' DAVID, W. CENTRY.

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