US2455592A - Adapter attachment for indicator dials - Google Patents

Description

Deb. 7, 1948. J. F. LIVELY 2,455,592

' ADAPTER ATTACHMENT FOR INDICATOR DIALS 7 ,9 1 [Li A? III/A: a

a\a\l Inventor 7 WWW fi/mgg Patented Dec. 7, 1948 s PATENTg-fiOFFICE 2,455,592 a Animal-summaries mbloa'ron' DIAL-SJ ll H '...l

tam F. Lively, MountVerndfi Qhio V 9, magistra es, 545. 769 (teams. (01. 172)?" This invention relates to a special adapterlinjthe form of an attachment which is; directly engageabl'e with-[the Work, thesamekbeing adapted to accommodate a substantially standardStar-rett dial test indicator. 5 l

In carrying out the structural and functional principles of the invention I have evolved and produced a combination attachment and dial indicator which is characterized by compactness and convenience, is strong, reliable, efflcient in use, expeditious in its action, will speed up the work by locating numerous points on the work being acted on, will definitely inform the attendant when a.

point is accurately located instead of depending on make-shift mirrors and other ways-and-means of ascertaining what should be reliable and depend-able results.

More specifically, the adapter attachment is in the form of a substantially U-shaped frame, one

arm thereof carrying the dial indicator and the e ing the indicator dial and adapter attachment, all constructed in accordance with the principles of the instant invention.

Figure 2 is a top plan view with certain of the parts, principally the dial casing, removed to expose the other parts, this for clearness of illustration.

Figure 3 is an end elevation of the structural assemblage with the indicator dial and its attaching,

arm removed, the view being an observation of Figure 1 in a direction from left to right.

Referring now to thedrawings by distinguishing reference numerals, the conventional Starrett dial gauge or indicator is denoted by the numeral 4 and includes the customary casing unit 5, actuating rod 6, the casing being mounted on a head I on the inner end of a grooved rod 8. In this instance, the actuating rod 6 is provided with a beveled button 9.

portion! 1,, an right a iigularly disposed limbs o arms I: and, 13, the latterarm being relatively boreirrtermediate 1 its ends and "an outstanding socket 14 in alignment therewith. The socket contains a coiled spring [5. It also serves to accommodate the adjacent end portion of the workcontacting finger or plunger rod l6. The rounded duced shouldered portion 18, the portion I! being held in place by a set screw l9 and carrying a conical wedge 2|] engageable with the motion transmitting button 9. The dial gauge or indicator 4 is positioned between the arms l2 and I3 and over the bight portion in proper coacting position and is held in place by a set screw 2| carried by the arm 12 and engaging the adjustable indicator The adapter attachment comprises a substantially U-shaped frame unit In embodying a bight arm 8. l With this arrangement the contact; finger 1-6, that is, the part which engages the work surface is mounted for spring-pressed action in the adapter frame arms and is parallel to the arm 8, the latter carrying the indicator 4 and positioning the same directly above the contact finger l6 and at a point between the two frame arms [2 and I3. As the right-hand rounded end of the contact finger l6 comes into engagement with the surface being acted upon, the motion is transmitted thereby to the cone 20 and from the cone to the button! which reciprocates the actuator rod 6 and denotes the result on the dial face. i

This indicator attachment is an extremely useful device to denote with accuracy a hole whereas the indicator is readable without using a mirror such as is sometimes required when the indicator is in improper relationship to the Work-contacting element. It is believed, however, that these factors are quite evident to persons skilled in the art to which the invention relates.

It is thought that persons skilled in the art to which the invention relates will be able to obtain a clear understanding of the invention after considering the description in connection with the drawings. Therefore, a more lengthy description is regarded as unnecessary.

Minor changes in the shape, size and arrangement of details coming within the field of invention claimed may be resorted to in actual practice, if desired.

I claim:

1. An adapter attachment fora dial test indicator comprising a substantially U-shaped frame including a central bight portion and long and short arms connected thereto and extending laterally therefrom, the short arm having an opening for passage of a coactin-g contact finger, the longer arm being provided with a bore and an aligned socket opposite to and in alignment with said opening, a coilcd spring in said socket, a work engaging and contacting finger bridging the space between said arms and parallel to said bight portion and having one end sli-dable in said socket and 1 the other end slid-able in the opening of said short I arm.

2. An adapter attachment for a dial test indi-i-" cator comprising a substantially U -s-hapedi trams embodying a bight portion and a pair of complemental arm-s, said arms being substantially '3 parallel to one another, one arm havinga guide1. opening for accommodation and passage of a sliding contact finger, the remaining am being provided with abore and alsock'et' aligned said bore, said socket extending outwardly beyondthe arm and being in alignment'with. the" opening in said first-named arm, a coiled spring located and for, coaction with the usual actuating rod pro-' vided onsaid indicator.

JOHN F. LIVELY.

v e REFERENCES CITED The following references are of record in the life of this patent:

' UNITED STATES PATENTS Number V I Name" Date 968,88 fi" Reisnejr' et al; Aug. 30, I910 I',6U0;089j vBll'ShL Sept. 14, 1926 1595845; 4 Carpenter e Dec'. 18, 1928

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