US827794A - A-frame. - Google Patents

Description

N0. 827,794. PATENTED AUG. 7, 1906. W. FBRRIS & W. E. MAGIB.

A-PRAME.

APPLICATION FILED 00T.20, 1905.

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No- 827,794. PATENTED AUG. 7. 1906. W. PERRIS & W. B. MAGIE.

A-PRAME.

APPLICATION FILED 00120, 1905.

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No- 827,794. PATENTED AUG.'7,.1906.

W. FERRIS& w. B. MAGIE.

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APPLICATION FILED 00120, 1905.

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UNITED STATES PATENT OFFICE.

WALTER FERRIS AND WILLIAM ELSTON MAGIE, OF SOUTH MILWAUKEE,

WISCONSIN, ASSIGNORS TO THE BUCYRUS COMPANY, 'OF' SOUTH MIL- l/VAUKEE, WISCONSIN, A CORPORATION OF WISCONSIN.

A-FRAME.

Specification of Letters Patent.

Patented Aug. 7, 1906.

To M, w/wnc it may concern:

- Be it known that we, WALTER FERRIs and WILLIAM ELsToN MAGIE, citizens of the United States, residing at South Milwaukee, county of Milwaukee, State of Wisconsin, have invented certain new and useful Improvements in A-Frames; and we do hereby declare the following to be a full, clear, and exact description of the invention, such as will enable others skilled in the art to which it appertains to make and use the same.

This invention relates to A-frames which are employed to support the guys for booms of steamshovels, dredges, and the like.

The object of the invention is to render the parts readily interchangeable, so that repairs will be facilitated, and to provide improvements in structures of the character described, as will be hereinafter set forth.

Inthe accompanying drawings, which illustrate the invention, Figure 1 is a top plan view of the head of an A-frame. Fig. 2 is a side elevation of the same Fig. 3 is afront elevation of a head as shown in Figs. 1 and 2 with a modified lubricating means. Fig. 4 is a section on the line 4 4 of Fig. 3. Fig. 5 is a front elevation, on a smaller scale, of an A- frame including the legs and head. Fig. 6 is a side elevation of the same. Fig. 7 is a side view of a leg, and Fig. 8 is a front view of the upper portion of an A-frame which is slightly modified.

Referring to the drawings, the A-frame comprises a head B and converging legs C and D. Suitablymounted lugs E and F support the frame.

The head B consists of the usual journal 1, to whichthe guy for the boomis secured. The back 2 and walls 3, 4:, 5, and 6 form channels for receiving the legs, and the back mayv be cored out, as shown, for the sake of light ness. The eye 7, extending from the back of the head, provides a means for securing the guy for anchoring the A-frame.

As in Figs, 1 and 2, a groove 8, constituting an oil-chamber, may be formed in the upper part of the journal, and holes 9 serve to lead the oil from the chamber to the bearing-surface. A modified means of lubrication is shown in Fig. 3, in which the center of the journal is cored out to .form an oil-chamber 10, which communicates with the bearingsurface through holes 11. At the lower ends of the leg-receiving channels flanges 12, 13, 14', and 15, through which holes are made, are provided to facilitate the attachment of leg-securing caps 16 and 17 to the head. In order that the legs when secured may be firmly held, channels 18 may be provided for securing filling material, such as shims 1 9 or Babbitt metal 31, in position about the legs. The legs C and D are shown as being of square section; but the section may have other shapes. The extremities of each 1e are bent into parallel planes, and p'aralle holes are bored in the bent extremities.

In assembling the frame the two converging ends of the legs are introduced into the leg-receiving channels in the head. A pin 20 is then passed through the holes in the leg extremities within the head and suitable holes formed in the head itself. This pin may be secured by any means, such as nuts, asshown, andextends along the plane of the legsthat is, it lies in or is parallel to that plane. The legs are further secured to the head by means of caps 16 and 17, which are secured to the head at the lower ends of the channels, being drawn down against the legs by bolts 21, 22, 23, and 24 passing through the holes in the flanges 12, 13, 14,-and 15. The leg is thus forced firmly against the back of the head. The firmness of connection between the legs and the head is still further enhanced by inserting a fillingsuch as shims or Babbitt metal, before referred to between the legs and the channel-walls. The lower extremities of the legs may be secured to the lugs E and -F by means of pins 25 and 26, extending through holes in those extremities and suitable holes in the lugs.

Fig. 8 illustrates a modification of the ap paratus described, but which departs in no essential features therefrom. The head is di- Vided, so that the leg-receiving channels are formed in separated members, and each of the legs is secured by means of a separate pin, the two pins difi ering from the pin 20, hereinbefore described, only in that they are separated in the middle of the head. The two pins in the one case are the equivalent of the one pin in the other. In Fig. 8 the means for securing the pins within the head comprise plates 27 and 28, pivoted upon screws 29 and 30, so that they may either cover the pin-holes or not, as desired, they being held in ICO receiving said legs, a securing-pin extending any desired position by tightening the pivotscrews.

Without being limited to the precise construction shown, what we claim 1s 1. In an A-frame, the combination with the head oftwo separately-removable converging legs and a securing-pin extending along the plane of said legs.

2. In an A-frame, the combination with the converging legs of the head having channels for receiving the legs, a pin extending along the plane of said legs for securing said legs in the upper ends of said channels, and means for securing said legs in the lower ends of said channels.

3. In an A-i'rame, the combination with the separately-removable converging legs of the head, a securingin extending through said head and legs a ong the 'plane of said legs, and means at the lower part of the head for securing the legs thereto.

4. In an A.-frame, the combination with converging legs of a head having channels for along the lane of said legs and through said head and egs at the upper ends of said channels, removable cap-pieces secured to said head at the lower ends of said channels and filling about said legs.

5. In an Aframe, the combination with converging le s having their extremities bent into parallel p%anes, each of said le s havin a hole in each extremity and the ho es in a Ieg being .parallel, a head, a pin passing through said head and a hole in an extremity of each of said legs a support, and pins passingthrough the other holes in said legs and said support.

6. A head for an A-frame having an oilchamber formed therein, a bearing-surface and holes connecting said chamber with said surface;

In testimony whereof we afiix our signatures in presence of two witnesses.

WALTER FERRIS. WILLIAM ELSTON MAGIE.-

Witnesses:

RIDGELY FLETCHER. HARRY B. HAYDEN.

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