US1631896A - Calipers - Google Patents

Description

June 7, 1927.

H. A. sT. JOHN ET AL CALIPERS Filed April 25, 1925 TTORNEY Patented June 7, 1927.

usirso STATES PATENT OFFICE.

sinner A. sr. JOHN AND Joan E. entrain, OF UTICA', NEW YORK.

oALIPE s.

Application filed April 25, 1325. Serial No. 25,899.

Our invention relates to calipers and we declare the following to be a full, clear, concise and exact description thereof sufiicient to enable anyone skilled in the art to which it appertains to make and use the same reference being had to the accompanying drawand, therefore, not readily accessible except by opening a cover, an invention is designed to be useful especially in measuring the diameters of such ournals. Furthermore, the

calipers will be useful not only'in'raih oad shops but also in any and all shops of any nature, where inspection and repairs-are made to equipment. 'j

The object will be understood by referring to the drawings, in which: r Figure 1 isa perspectivevi'ew of'the device showing parts broken away;

Figure 2 is adetail view showing a locking latch and immediate parts employed in the device.

Referring more particularly'to the draw ings, the device embodies extension members 1, 2 that are, in each instance, bent downwards at right angles at 3,and again mwards towards each other at'l, 4. The ends 4, 4 are adapted to make contact with the diametrically opposite sides of the journal or axle 5 to be measured. Furthermore, inasmuch as axle 5 of a railroad car is equipped on itsouter end with a boss or' collar 6, ends 1, 4 will permit of the clearance of said collar 6. j

Extension members 1 and 2 are hinged at 7 to members 8 and 9 respectively, whereby extension members 1 and 2 can be folded back and upon a plane with handles 10, 10 of the calipers to make said members co1- .lapsible. Draw bolts 11, 11 are mounted on extension members 1 and'2 and engage eyelets 12, 12 fastened to members 8 aud t), whereby to hold extension members 1 and 2 in prolongation of members 8 and 9 to be in operative position.

1 Furthermore, members 8 and 9 are united to links 15, 15 by pivots 16, 16 and links 15, 15 are united in turn to the lever arms 20, 20 of handles 10, 10 by pivots 21, 21. It will be observed that one of lever'arms 20 is offset at 22, whereby its free end 23 will be in the same plane with the free end '24 of the other arm 20. Arms 20 are fulcrumed at 25 .upon bolt 26. The rearwardly extending parts are formed into handles 10, 10

adapted for the insertion of the fingers to aid in manipulating the calipers.

Extension members 1 and 2move par-- allel to each other, whereby to give the correct measurement of the diameters of axles To this end, an enlarged plate is rigidly mounted to member 1 by brazing or otherwise, A sleeve '31 is formed on plate 80 for the sliding reception of rod 34, which extends therethrough andbeyond to accommodate the lateralmovement of member 1. One end of rod 34 is fixed within a sleeve or hearing 32 formed integral with member 2 by means of a cotter pin 33 that projects through bearing 32, an aperture in rod 34 and member 2.

Removing cotter pin 83 will allowfor the removal of rod 34 for packing purposes. v

Moreover, plate 30 is recessed for the sliding-reception of graduated scale 40 that is attached at one end by a screw 41 to abracket 42 projecting laterally from member 2 and offset therefrom, whereby the upper surface of scale 40 will lie flush with the upper surface of enlarged part 43 of member 2. An indenture or open recess 44 is formed on plate 30 to allow for the clearance of the head of said screw 41.

In order to accommodate a more or less greater movement of extension member 1 and 2 to a lesser movement of handles 10, 10, the angle of links 15 relative to lever arms 20, 20 can be fixed by adjustable devices, embodying flat springs that are riveted at one end, in each instance, to links 15. Each of the free ends thereof, however, is equipped with an upstanding lug 52 adapted to project up through an aperture in links 15 and into an open recess 53 formed in the end of lever arm 20. In order to release or withdraw. lug 52 from one of the open recesses 53 formed in the end of each of lever arms 20, 20, there is provided a linger piece 54 fixedtospring 50 and extend ing 11 award through an alined recess in link 15. aid linger piece 5 1 will extend necessarily a little higher than lug 52 so that when the finger is pressed. thereon to depress spring 50 lug 59, will clear open recess 53, when the top o1": finger piece 5-4: is pressed down flush with the top surface of links 15. Immediately lug 52 has been pressed down clear of open recess 53 in the end of lever arm 20, link can be turned on its pivot 21 to increase or decrease the angle relative to lever arm 20. Log 52 under force of flat spring 50 will snap back into the corresponding open recess 5 ot lever arm when link 15 has been turned into such position that lug 52 will come opposite thereto.

In using the calipers, the railroad yardman, after the train has come to a stop,

will open the cover, not here shown, of the 1ournal box and thrust the extension members 1 and 2 therein in such manner and .move handles so that theends thereof will so that the ends 4:, 4; will make contact along the accessible part-of the axle to determine any flaws or unevenness therein. The measurement 0t the diameter can be determined by reading the scale at 55 and at 56 for.

more accurate determinz'ition. The readings will be made at 57 where the edge of plate 30 16 contiguous with said scale 40. In the event that all of the readings are not the same, and a flaw is discovered, thereby, the location of such flaw will be fired by readfing the graduated scale 58 on extension member 1. I

In order to limit the movement oft handles 10, 10 when. measuring. axles 5 of large di- 50 and links 15 as above stated.

- A set screw 60 having a bearing in enlarged plate is adapted to make contact with. graduated scale 4.0, whereby to hold the parts'in set position. when ends 4;, 4 of extension members 1 and 2 are brought into contact with the diametrically opposite sides of the journal 5. The parts will be held thus by said screw 60 until the reading of the graduated scale 40 can be had.

Having thus described our invention what we claim as new and desire to secure by Letters Patent is:

1. In a calipers,elongated members having ends bent at right angles thereto to ongage the extern a 1, surface of a journal, means whereby said members are maintained in parallel relation to each other, a link pivoted to each of said members and a lever adjustably secured to each link, said levers being pivoted to each other at an. intermediate point, whereby to move said links and thereby cause movement of the elongated members towards and away "from each other while maintaining their parallel relation.

-' 2. In a calipers, two elongated members diate point, whereby the movement of said levers will efl'ect a relative movement of said elongated members: The calipers will be moved longitudinally 4. In a calipers, elongated members, a member engaging one elongated member and slidingly mounted as to the other, whereby to maintain said elongated memhers in parallel relation to each other, a link pivoted to each of said elongated members,

a lever adjustably secured to each link, said.

levers being pivoted to each other at an intermediate point, whereby to move said links and thereby cause movement of the elongated members towards and'away from each other while maintaining their parallel relation, and means whereby tofix the relation I of said links with said levers.

5. In a calipers, hinged elongated inembers, amember engaglng one elongated memmember engaging one elongated member and her and slidingly mounted as to the other,

whereby to maintain said elongated members in parallel relation to each other, a link pivoted'to each of said elongated members, a lever adjustahly secured to each link, said levers being pivoted toeach other at an intermediate point, recesses formed in said levers, and spring actuated means mounted on said links and adapted to engage the recesses formed in said levers, whereby to move said links and thereby cause a movement of the elongated members towards and away from each other while maintaining their parallel relation, and means whereby to fix the relation of said links with said levers.

6. In a calipers, elongated members, a rod engaging one member and slidingly mounted as to the other, whereby to maintain said members in parallel relation to each other, a link pivoted to each ofsaid members, a lever adjustably secured to each link, said levers being pivoted to each other atan intermediate point, and means for holding said levers in given relation to said links whereby to members.

engaging one member and slidingly mounted 7. In a calipers, elongated members, a rod en agingone member and slidingly mounted as to the other, whereby to maintain said members in parallel relation to eachother, a link pivoted to each or said members, a lever adjustably secured to each link, said levers being pivoted to each other at an intermediate point, spring pressedmeans mounted in said links and levers havingrecesses for the reception of said spring pressed means,

Whereby to govern the extent of the mover ment of said members.

8. In a calipers, elongated members, a rod 15 as to the other, whereby to maintain said link pivot-ed to each of said members, a lever adjustably secured to each link, said levers being pivoted to each other at an intermediate point, spring pressed lugs mounted in said links, levers having recesses adapted for the reception of said lugs, whereby to govern the extent of the movement of said mem bers, and means for moving said" lugs free from said recesses.

In testimony whereof we aflix our signatures.,

JOHN F. GRIFFIN. HENRY A. ST, JOHN.

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