knurled head 62 is slidably disposed in the bore.
A spring 64 is disposed concentrically around the
pin and anchored to the pin and the head for
urging the pin inwardly into engagement of a
series of perforations 68, which are circumfer- 0
entially spaced on an annular spacing ring 66.
The ring 66 is seated in the rear face of the
circular body section 12, as seen in Figures 1
The perforations formed in the spacing ring 10 are spaced in a predetermined manner in various multiples or divisions to correspond to the graduated dial formed on the face of the plate 18.
Thus, the dial plate can be adjusted to the desired position, by means of the indexing finger or 15 block 50 and locked in the position by means of the pin, engaged in one of the openings 68 in the spacing ring. With the spacing ring marked or formed with the openings in a predetermined pattern, after the first cut or keyway was 20 machined in the work, the indexing finger would be rotated a predetermined number of openings on the spacing ring relatively showing 90 degrees on the graduated dial and the pin would then be positioned within the openings. Thus, the 25 dial would be locked in the desired position. After each machining process, the shaft is freely rotated, so that the level gauge will be disposed on a level plane.
The lock nut 52 will be securely positioned 30 against the index finger or block to eliminate lateral movement thereof. Since the indexing finger is fixed to the spindle formed integrally with the graduated dial, the dial and finger are relatively locked together, so that rotation of as the finger will produce a corresponding rotative movement of the dial.
It ean thus be seen that, by way of improvement over my co-pending application, I have provided a means for adjusting the dial plate in an 40 accurate manner, without the necessity of sealing the same.
Having described the invention, what is Number claimed as new is: 306,429
1. A device for determining accurate work- 45 645,058 ing points on a work piece comprising a body 742,077
section having a central recess, a dial plate 773,262
rotatably disposed in said recess, a level gauge 893,954
carried by the face of said dial plate, a spindle 1,063,342
extending integrally from said dial plate rotat- 50 1,284,879
ably extending through the body section, an in- 2,129,695
dexing finger secured on the extending end of 2,423,317
said spindle for rotating said dial plate, means
carried by said finger and detachably secured
to said body section for locking the plate 55 Number
in a desired position, and means for securing the 20,928
body section on a work piece, said locking means 20,929
including a spring-urged pin carried by the free end of the indexing finger, a spacing ring associated with said body section and having a series of circumferentially spaced openings, said pin being engageable in said openings.
2. The combination of claim 1, wherein said means for securing the body section on a work piece includes a saddle plate integrally formed on said body section, lateral extension plates on said saddle plate, flexible connecting means carried by said extension plates, said flexible connecting means having one end fixed in one of said extensions and the other adjustably secured to the other of said extensions.
3. A measuring instrument of the type described for determining work points on a work piece comprising a circular body section having a central circular recess in one side, a circular protractor rotatably disposed in said recess and having an integral spindle rotatably extending through the back wall of said body section, a level gauge carried by the outer face of the protractor, an indexing finger locked on the extending portion of the spindle and adapted to rotate said protractor, a spacing ring secured in the rear face of the body section and having a series of circumferentially spaced openings, a locking pin carried by the free end of the indexing finger, and means for retaining said pin in engagement with one of said openings.
4. The combination of claim 3, wherein said last means includes a spring concentrically disposed about the pin and secured thereto for urging the same inwardly into engagement with the openings.
The following references are of record in the file of this patent:
UNITED STATES PATENTS
Rich Oct. 14, 1884
Bechtol Mar. 13, 1900
Sovelius Oct. 20, 1903
Newton Oct. 25, 1904
Van Huffel July 21, 1908
Ekman June 3, 1913
Donaldson Nov. 12, 1918
Karnes Sept. 13, 1938
Holton July 1, 1947
Great Britain 1907
Great Britain 1907