US1439704A - Reversible fulcrum - Google Patents

Description

Dec. 26, 1922. ,439,704.

w. o. HEDGCOCK.

REVERSIBLE FULCRUM. FILED SEPT. 12, 1921.

Patented Dec. 26, 1922 .'iSTr;

' WILLIAM o. Hniieoocieor erIIeAeo,l ILLINOIS, Assrerioia` @AMERICAN STEEL Fountains, or CHICAGO, ILLIrio'Is, A ooitronAfrronor nnwannsnr.

` nEvERsIBLE rULoRUivr.

j Application iled September 12, 192,1. V Serial No. 499,935.

To @ZZ whom t may, concern: i y

Be it known that I WILLIAM C. Hnos oook, a citizen of the 2United States, residing at Chicago, State of i and usefullmprovenients in a Reversible Fulcrum, of` which the yfollowing is a speci'- cation.

. This invention relates to, brake beam fulerums and more particularly to fulcrums of the reversible type. l p p Many reversiblefulerums in use satisfactorily provide the reversible feature buty permit a certain amount of lost motion inA movement, eliminates longitudinal lost nioy tion from the joints which permit reversibility. i

Anotherv object is to provide a reversible fulcrum adapted to meet the various requirements under service conditions.

by means ofthe arrangement disclosed on the accompanying sheet of drawings, 1in

Figure 1 is a side elevation of my improved reversible fulcrum connectedto the tension and' compression members which are shown in section, the fulcrum body being `shown in its central position;

Figure 2 is a top `plan view ofthe same arrangement, a part vof the compression vention will be apparent from the following description andv drawings and4v will be parin the county of Cook and illinois, have invented certain new` the thimble member 14C, the latter being se- These and other objects are accomplished.

f ticularly pointedoutin the appended claims. i

Referring to the ligures ofthe drawings it will be noted that my invention is disclosed in connection with a brake beam of the trusstype and including; a compression member 10, a tension member 11 and aful* crum 12 interposed therebetween. `The complete connection between the tens-ion and compression members includes the main ful` cruni body13, a thimble or pivot member 6 1li,`a clamp .memberv 15 and a tension rod saddle member 16.

The main fulcrum body 13 has the'usual brake lever receiving openings l17 and alined pivot pin openings 18 in opposite walls of the fulcrum body by means of which the lever is pivotally secured to the body.y The rear end of the fulcrum body'13 is provided with a pocket 19 which receives one end of cured to the fulcruin` body 1,3 bya rivet 20, thereby making a firm` connection between the two partsin question. This tliimble member 14 extends through an opening 21 inv the clamp 15 and is provided witha circular head 22, the thickness of which isv greater than the distance by which the intermediate portionoftlie bracketis oset at the point 23 vwith respect to the legs 24 ofthe clamping member by meansA of which the latter is secured to the compression member by rivets 25,. a .resultthereof, this clamping arrangement eliminates any .lost motion longitudinally of the fulcruinbody with respect to the tension and compression member, forming a rigid truss. At the same time the reversible` fulcruin body 13 can be rotated or reversed by the application of sufcient force lto overcome the clamping action between l,the head 22 of the thimble member andthe compression member and Aclamp15. y I f As is known, the fulcrum'bodyrill'when Ain either `of its usual operative positions,

the fulcruni body is' provided with a plu- 105 rality of projections 26 which are adapted to engage` shoulder portions 27 formed von the clamping member 15.

The front end of the fulcruin body 13 is i provided with a cylindrical portion 28, the v11o iooA end 29 of which is spherical and is received in the pocket 30 of a saddle 3l having spaced lips 32 for the reception of the tension member 1l. It will be noted that the saddle member 3l is provided with/an elongated opening 33 through which a portion of the spherical end 29 of the ulcrum body 13 ,extends so that the tension rod ll bears directly upon the spherical end 29 of the body 13, thereby eliminating any extra joints between the tension member yand the fulcrum body.

It is my intention to cover all modifications of the invention falling within the spirit and scope of the following claims.

I claim: i f f l. In a brake beam, the combination oi a compression member, Ia reversible ulcrum body, a member secured to said fulcrum body, and means for clamping said member to said compression member for eliminating any lost motion between said compression member and ulcrum body longitudr,

nally of the latter.

2. In .a brake beam, the combination of a compression member, a reversible ulcrum body, a member secured thereto, and a clamp having an opening through which said member extends, said member having a head clamped intermediate said clamp and said compression member for preventing lost motion longitudinally of the ulcrum body.

3. In a brake beam, the combination of a compression member, a reversible ulcrum body, a member secured thereto, a clamp,

said member having la head clamped intermediate `said clamp` and said compression member for preventing lost motion longitudinally of the fulcrum body, and means for limiting the movements of said reversible y fulcrum body in opposite directions.

4t. In a brake beam, the combination of a compression member, a reversible ulcrum body having a pocket 'in one end thereof, a member extending` into said pocket, being` secured to said fulcrum body and having a head portion, and means clamping said head portion against said Icompression member for eliminating` lost motion kbetween the parts longitudinally of said fulcrum body.

y5. In a brake beam, the combination of compression member, a reversible ulcrum body having a pocket in one end thereof, a member extending into said pocket, being secured to said :Fulcrum body and having a head portion, and means clamping said head portion against said compression' member for eliminating lost motion between the parts longitudinally of the fulcrum body, said 'ulcrum body and clamping means having co-operatingportions 4for ,limiting reversible movements of said ulcrum body.

6. ln a kbrake beam, the combination of a compression member, a clamping member secured thereto and having an offset portion with respect thereto, a reversible fulcrum body, and means for operatively connecting said body to said compression member, including a member having la head clamped between said compression member and clamping member, the head being greater in thickness than the oi'i'set of said clamping member whereby lost motion longitudinally oi the fulcrum body is eliminated.

7. ln a brake beam, 'the' combination or" a compression member7 a clamping member se cured thereto and having an oliset portion with respect to said compression member, ayreversible fulcrum body, means for operatively connecting said body to said comp-rcssion member, including a member having a head clamped between said compression member and clamping member, the head beingl vgreater in thickness than the offset of said clamping member whereby lost motion longitudinally of the ulcrum body is prevented, and means for 'limiting the extent of reversible movement of said fulcrum body. y 1` S. ln a brake beam, thecombination of tension and compression members, a reversible fulcrum body extending therebetween, a clamping connection between said fulcrum body and said compressionmember, and a saddle relatively rotatably mounted with respect to said fulcrum `bodyand having anopening through which said body eX tends whereby said body may have direct engagement with said tension member.

9. ln a brake beam, the combination oi? a compression member, a clamping member, and a reversible tulcrum body having an operative connection vwith said compression member whereby a clamping action caused by the relationship of said compression member and clamping member upon said connection prevents lostmotion longitudinally of said tule-rum body.

Signed at Chicago, Illinois, this 3rd day of September, 1921. A

. VILLIAM C. 'HEDGCOCK-

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