US994531A - Testing mechanism. - Google Patents

Description

Umani) "STATES PATENT OFFICE.

VJOHN F. OCONNOB, OF CHICAGO, ILLINOIS, ASSIGNOR TO WILLIAM H. EINER, 0F

l CHICAGO,` ILLINOIS.

TESTING iirEcHANrsM.

Specigcaton of Letters Patent.

Patent-ed .lune 6, 1911.v

Applieation filed February 25, 1911. 'Serial No. 610,701.

To all wwm it may concern: l

Be it known that I, JOHN F. OCoNNon, a-citizen of the United States, residing in Chicago, in the county of Cook and State of- Illinois, have invented a new-and useful Improvement in Testing Mechanism, of which 'the following is a specification.

My invention relates Ito improvements in testing mechanism. j

The object ofmy invention is to provide' a testing mechanism for draftrigging of rail-- Way cars, which will be of a' simple construction,iand eliicient and reliable in operation, and by means of which the practical oper.-

ativeness or efficiency of a draft rigginginpreventing the shearing of the rivets which connect the stop members of a draft rigging with the center sills or frame members of a car, maybe practically' and reliably ascertained.

vpart of this specification, Figure a front elevation of a rivet shear draft rigging test' mg apparatus embodying my invention.

Fig. 2 is a horizontal section on line 2- 2 of 'F ig. 1, the sectionline`2.'2 being also shown on Fig. 3. Fig. 3 is a. detail elevation,

partly in central, vertical section of the rivet.A

shear testing sleeves 'and .their holder block. In the drawing, 1 represents an anvil bed of masonry, 2 an anvil, 3 a drop hammer,

` preferably of about 9000 pounds weight, 4

the nose or striking plate of the hammer,

the upright guides or frame-0f the drop hammer, 6 the cross head, 7 the hoisting line,

. preferably wire rope, and 8, 9, 10, 11 pulleys .for the hoisting rope, All these parts may be of any ordinary or, suitable construction.

14 represents a railway draft rigging to be tested as to itseectiveness. in cushioning blows and consequent prevention ofrivet shearing on the rivets which' connect the stop members of the draft rigging with the center sills or frame members of the car.

15, 16. are a pair of rivetshear testing` sleeves accurately turned to fit snugly and telescopicallytogether. Each of these rivet testing sleeves 15, 16 is furnished with accurately ydrilled and'regis'tering rivet holes 17,

18,l preferably twenty in number, in which the rivets 21 accurately and snugly fit but with sufficient looseness to enable theV rivets to be slipped'or pushed in by hand in order that they may be quickly inserted, and also to secure absolute uniformity of conditions in testing. -T he rivets-21 are preferably one and a quarter inches in diameter, and each preferably made just long enough to pass through both ofthe testing sleeves 15, 16.

23 is an anvil block or holder for the testingsleeves.- It is furnished with an annular shoulder 24 against which the outer testing sleevelG abuts at its lower end, and la further annular' shonlder 25 which is spaced apartI from the lower end of thejnner test-Y 'furnished with a head 22, and therivets are ing sleeve 15, preferably the diameter of a'y rivet, and against which stop shoulder 25 'f the inner testing sleeve 15 may 'abutafter the rivets 21 connecting the testing sleeves have been sheared by `action of the drop hammer 3. The testing sleeve holder or supplemental block 23 is preferably furnished with a guide extension 26, which lits loosely within the inner testing sleeve. 15.

27 is a metal block or plate, preferably 'two or three inches in-thickness, which rests on top of the inner rivet shear testing sleeve l5 and 2S is a similar metal plate or block which is placed on-the upper end ofy the draft rigging 14 as a striking plate for the nose 4 of the hammer 3 to engage.

The draft rigging 14 to be tested may of course be of any known construction. -As i represented in the drawing, it com rises a friction shell as a, frlction shoes as and a wedge as o and a spring Within the friction shell. I

In operation, the rivet holes of the sleeves are first vfilled with rivets and then subjected to a blow from the drop hammer falling from a height suiiicient to shear the rivets when 'no draft ri ging .or cushioning mechanism is interposey between the striking blocks or plates 27, 28.- The draft rigging to be tested is then `inserted between the plates 27, 28 andy the increased'height .from which the hammer 3 is required to; drop in order to shear the rivets will repre' sent the relative eiicieney of the draft ri ging as compared'with the solid or unyieldingconnection between the hammer and the testing sleeves.

1. A testing apparats for-draft rigging, comprising in coperative combination an anvii, a drop hammer, a pair of rivet shear testing sleeves furnished with registering rivet holes into which rivets may be slipped, and asupplemental anvil block or holder for said testing sleeves, having anannular shoulder for one of the testing sleeves to abut against, and a sto shoulder for the other testing sleeve to a ut against in the shearing of the rivets, substantially as specified;

v2. In a testing apparatus, the combinationV with an anvil-and drop hammer, of a. pair of rivet shear testing sleeves between .the hammer and anvil and furnished with rivet holes, substantially as specified.

3. In a testing apparatus, the coriibinatio'n with an amil and drop hammer, of a pau' of rivet shear testing sleeves furnished with rivet holes, and a holder for said testing sleeves having a pair of stepped annular shoulders and also provided with a. central extension adapted to fit within the inner testing sleeve, substantially as specified.v

- JGHN F. OCONNOR. W'itnesses:

F. SEYMOUR CLARK, M. GRACEv RAP?.

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