US1126729A

US1126729A - Arch-bar truck.

Info

Publication number: US1126729A
Application number: US83298814A
Authority: US
Inventors: Frank Ditchfield
Original assignee: Individual
Current assignee: Individual
Priority date: 1914-04-18
Filing date: 1914-04-18
Publication date: 1915-02-02
Anticipated expiration: 1932-02-02

Description

F. DITGHFIELD.

ARCH BAR TRUCK. APPLICATION FILED APR.18, 1914.

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FRANK DITCHFIELD, OF MONTREAL, QUEBEC, CANADA.

ARCH-BAR TRUCK.

Specification of Letters I'atent.

PatentedFeb. 2, 1915.

Application filed April 18, 191i. Serial No. 832,988.

To all whom it may concern:

Be it known that I, FRANK DITCHFIELD, a citizen of the Dominion of Canada, and resident of the city of Montreahin the Province of Quebec and Dominion of Canada, have invented certain new and useful Improvements in Arch-Bar Trucks, of which the following is a full, clear, and exact description.

This invention relates to improvements in arch bar trucks, and more particularly to the columns used in these trucks to space the upper and lower arch bars apart and form guides for the bolster ends.

The object of the invention is to produce a column of absolute rigidity which will securely hold the arch bars without'the use of column bolts.

A further object is to provide a column conforming to existing standards, so that the same may be applied to either new or old trucks without making any change.

A still further object is to provide a column which may be easily and quickly applied either to new or old trucks or to existing trucks as an emergency repair part.

At the present time, by far the greater number of arch bar trucks in use are provided at the center with a pair of columns clamped between the top and bottom arch bars by column bolts passing through the arch bars and the columns, these bolts being secured by nuts which wear loose in comparatively short time,'so that the stiffness and rigidity which should be imparted to the truc'k by the'columns is lost, and a constant working between the parts of the truck results, which very soon destroys -the truck. The present invention aims to overcome these disadvantages by providing a column securable to the arch bars without the use of column bolts in such a manner that the columns will not wear loose and rattle, but will always remain rigid, imparting the necessary support to the truck side frame.

In the drawings which illustrate the invention :Figure 1 is a side elevation of an arch bar truck showing my improved column in position. Fig. 2 is an enlarged side elevation of the column. Fig. 3 is a vertical sectional View on the line 33, Fig. 2. Fig. at is a cross sectional View on the line 4i, Fig. 2.

Referring more particularly to the drawings, 5, 6 and 7 represent the top and bottom arch bars and tie bar respectively of a truck side frame. The columns 8 are secured between the top and bottom arch bars on opposite sides of the spring plank 9 to which they are attached, and form guides for the bolster 10.

bars is maintained not by the small amount of metal representing the threads of a pair of nuts, but by the entire mass of metal of the columns themselves.

Each column comprises an outer half 11 and an inner half 12, which are exactly similar except that the inner half 12 may be provided with an integral arm 12*, for the attachment of a brake head hanger. Each half of the column is substantially of channel or Usection, the two halves being secured together by rivets or bolts 13, passing through the webs 14 of the members, so that the finished column is of Hsection, as clearly shown in Fig. 4. The webs of both the inner and outer halves are formed at top and bottom to provide pockets l5 and 16 for the top and bottom arch bars, these pockets being formed half in the outer and half in the inner column members, as clearly shown in Fig. 3. The flanges 17 of the members follow the line of the web, so that the pocket portion is as strongly supported as any other portion. The arch bars of existing trucks are provided with holes for the passage of column bolts, and it is therefore convenient to utilize these holes for the purpose of holding the columns against movement along the arch bars. To this end, pockets 18 are formed in the top and bottom of the column, half in one member and half in the other, and intersecting the

pockets

15 and 16. When the column is applied, short pins 19 are passed through the bolt holes of the arch bars, and are received in the pockets 18. The tendency to movement between the arch bars and columns is in the same plane as the parting 20 between the column members, so that the stress thrown on the column through the pins 19 does not fall to any appreciable extent on the rivets, but is distributed to the two column members equally, as the pin and r 22 and enlarged to form lugs 23 in the same plane as the edges of the ribs, which may be bolted or riveted to the spring plank 9.

From the foregoing description, it will be seen that the upper and lower arch bars pass actually through the columns, so that the fixed relation between these columns is maintained not by columns and column bolts, as in the ordinary truck, but by the columns themselves without the use of bolts, which rapidly wear loose and permit rattling and working between the parts. The column may be applied to new or old trucks without any change whatever in the structure of the truck. The column instead of merely abutting the arch bars at its ends, as in the ordinary type, completely surrounds the arch bars, so that the bars are held against movement toward or away from each other and in a lateral direction. The pins shrouded in the column hold the bars against longitudinal movement. The cross section of the columns provides a maximum of strength with a minimum weight of metal. The arch bar pockets are formed in depth slightly less than half the width of the arch bars, so that when the column members are riveted together, there will be a very slight clearance or parting between the two members, which causes the whole tension of the rivets to clamp the members tightly around the arch bars. The upper and lower surfaces of the arch bars being engaged by the column, it is obvious that the connection is much more rigid and secure than when the columns engage only one side of the bars. The column cannot work loose except by wear of the large surfaces bearing against the arch bars. The column bolts which wear loose and permit rattling and racking of the frame are eliminated.

In new trucks, the columns are clamped in place, as already described, around pins passed through the arch bars, while in existing trucks, the columns are applied in the same way, the old column bolts being cut up if desired to form the pins. As an emergency repair part, the column is particularly useful, bolts being used in place of rivets. The two parts may be clamped around the arch bars without taking down any part of the truck side frame, whereas ordinary columns cannot always be inserted without loosening up the arch bars. While the description and drawings refer only to a pin passing through the arch bars and shrouded in the column, it is obvious that where the arch bars are provided with certain deformations replacing the pins, such as bosses, offsets or notches, the column parts may be formed to correspond therewith without departing from the spirit of this invention, such modifications being dependent on the form of arch bar with which the column is designed to be used. Thus, the columns may be provided with internal ribs or separate pins to engage notches in arch bars which have been thus formed for cooperation with other special columns, or specially shaped pockets may be formed in the column parts to receive variously deformed arch bars, for the reason that all these modifications are not modifications of the primary idea of clamping a two part column around the arch bars, but merely of the shaping of the column parts to receive the arch bars.

Having thus described my invention, what I claim is 1. A truck column apertured at its upper and lower ends for the passage of the arch bars, and separate pins for the upper and lower arch bars shrounded in the column holding the bars against longitudinal movement.

2. A truck column comprising a pair of parts secured together and embracing the upper and lower arch bars and tie bars between them, and pins-shrouded in said column passing through the arch bars and holding the same against longitudinal movement.

3. A truck column comprising two parts secured together around a truck side frame and completely embracing the upper and lower arch bars and tie bars thereof, and pockets formed in said column parts for the reception of projections on the arch bar portions passing through the column.

4. A truck column comprising a pair of substantially similar channel shaped portions each having a pocket therein for approximately one-half the width of the upper and lower arch bars, and pockets there in intersecting the bar pockets for the relcleption of pins or projections on the arch ars.

In witness whereof, I have hereunto set my hand in the presence of two witnesses.

Y FRANK DITCHFIELD.

Witnesses:

S. R. W. ALLEN, G. M. MORELAND.

Copies of this patent may be obtained for five cents each, by addressing the Commissioner of Patents,

Washington, D. G.