US1781329A - Pinch bar - Google Patents

Description

Nov. 11, 1930. H. M. HOWE 1,781,329

PINCH BAR Filed March 21, 1928 Patented Nov. 11, 1930 UNITED STATES PATENT OFFICE PIN CH BAR Application filed March 21, 1928. Serial No. 263,508.

The object of this invention is to provide a device especiallyadapted for use in moving railway cars for short distances, where no other power is available.

A further object is to provide a bar having a spur mounted in a special manner and affording an especial grip, the construction also permitting of the use of several different portions or edges of the device, as the edges be come worn, so that but little difficulty is experienced in keeping the tool in good condition.

A further object is to provide a pinch bar having a bore extending at any desired angle serving the purpose, or having a plurality of such bores, a spur or spurs-being mounted within the bore or bores and retained by set screws, and retained by additional means if desired.

With the foregoing and other objects in view, the invention consists in the novel construction and arrangement of elements described, illustrated and claimed, it being understood that modifications may be made within the scope of the claims, without departing from the spirit of the invention.

In the drawings forming part of this application,

Figure 1 is a view in elevation, showing the lower portion of a pinch bar, with the spur mounted therein, a portion of the latter being in dotted line.

Figure 2 is a ure 1. V

Figure 3 is a perspective view of the spur, or of the preferred form, this device constituting a cylindrical element.

Figure 4 is a furtl'ier section through the section on line 2--2 of F igfoot portion of the bar, but showing an adjustment diiierent from that in Figure 2, in

' order to provide for the proper position of the spurs when the lower end has been worn away through use and by grinding.

Figure 5 is a perspective view showing another form of spur, this device being rectangular in cross section.

Figure 6 shows a spur triangular in cross section.

Figure 7 illustrates a hexagonal spur. The shank of the bar is designated 10, and

the foot portion is shown at 11, this bar being provided with a bore or bores, one of the latter being shown at 12, in Figure 2, and posi tioned centrally with reference to opposite side portions of the foot 11. i 55 Various forms of mounting the spur 13 may be resorted to, but I have illustrated a spur held in position by set screw 14, and by a threaded element 15, constituting a headless screw engaging the walls of the bore.

The spur 13 is of cylindrical form in Fig urcs l, 2, and 3, but may be of various other forms, or having a different cross section as illustrated in the remaining views of the drawing. The cylindrical spur may readily berotated in the bore, upon loosening the set screw, and may be adjusted to a great variety of new positions, so that when the angular portion or edge has been worn through use, a new edge may be provided, without regrinding. When the spur is considerably worn and thereby shortened, the adjusting screw 15 is employed for imparting longitudinal thrust and securing the proper extent of projection at the lower end. 75

Figure 4 shows the use of a plurality of washers 18 for spacing the spur 13 from the upper end of the bore, it being assumed that the spur has been worn down by use and by regrinding.

Figure 5 shows a spur 20, square or rectangular in cross section.

Figure 6 shows a spur 21 triangular in cross section, and Figure 7 shows a spur 22 hexagonal in cross section. All the spurs provide a plurality of edges at the end portions thereof, so that when a corner portion has been worn off, the set screw 14 may be loosened, and a new gripping edge provided, rm without stopping the work for grinding. The tool is used to the best advantage by applying the toe portion at the point above the lowest point available, as the wheels rest on the rail, in order that rotation may be imparted with the least practicable resistance. A spur of the general type herein disclosed, and mounted as indicated, will outlast many spurs mounted horizontally, and as the set screw 14 may be adjusted with the use of the hand only, the tool is available for use at any time, many neW edge portions being available, successively, before regrinding becomes necessary.

What is claimed is:

1. Ina device of the class described, a

shank portion a foot member carried thereby and having a bore extending therethrough, the bone being at an angle with'fthe bottom of the foot member, a spur mounted in the bore, clamping means for retaining the spur,

and independent means 01 determining the position 01" the spur with reference to the lower end of the bore, said means last namedincluding a threaded device ithin the upper end of the bore said clamping means and independent means respectively engaging the spur l movement latera-llythereof and lengthw se 1 hereof.

2. In a (device of the class described, a

: shank portion a foot member carried thereby and having a bore extending therethrough, the borebeing at an angle iththe bottom of the foot member, cylindrical spur mounted in the bore and hav'ing'a rail engaging end V 01 substantially the cresssection of the remainder ofthe spur, and means for retainingthe'spur in an adjusted position, said spur being rotatable .to provide a sharp angular portion at any point around the edge of the an engaging end.

lntestimony whereof I mysignature.

HABRISQN M. HOWE.

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