US 2642906 A
Description (OCR text may contain errors)
H. H. FAUBIQN HACKSAW ASSEMBLY Filed Oct. 27, 1950 Mme 1953 i 14 V I N VENTOR.
ATTQ R N E Y 25- ElL/[h Patented June 23, 1953 UNITED STATES PATENT OFFICE 2,642,906 HACKSAW ASSEMBLY Howard Henderson Faubion, Tampa, Fla.
Application October 27, 1950, Serial No. 192,541
2 Claims. (Cl. 145-33) This invention relates to attachments which may be used with a fiat file having the usual handle, to form a frame in Which a hack saw blade may be held under tension for convenient use.
The primary purpose of the invention is to provide a simple, strong, efficient, and inexpensive pair of supporting bars or straps as attachments which may be readily adjusted to project from one edge of a fiat file of any usual width and thickness to carry under tension at their outer ends, a saw blade spaced from the edge of the file and substantially in the plane of one face of the file.
A further object of the invention is to provide a clamping means for use with the supporting bar at "the front end of the file remote from the handle which will be readily adjustable to compensate for diiferences in widths of files, or differences in taper of their outer ends, whereby the attachment may be maintained at the desired angular relation to the end of the file.
When the saw is released and the attachments are disconnected, the parts of the assembly will require much less space in a tool kit than is required by the usual U-frame type of hack saw.
In the drawings illustrating a preferred embodiment of the invention, Figure 1 is an elevation of an ordinary fiat file having projecting at one edge a pair of attachments of different lengths holding an ordinary hack saw blade under tension; Fig. 2 is a fragmentary elevation seen from the opposite side of a similar file and an attachment, with the saw blade in reversed position; Fig. 3 is a fragmentary sectional view showing a means for attaching one end of the saw blade to its supporting bar; Fig. 4 is a view of the smaller, rear attachment looking upward from the handle in Fig. 1, with the tang of the file and the tension bolt in section and with the wing nut removed; and Fig. 5 is a fragmentary elevation similar to that of Fig. 2, showing a narrower file and the eccentric clamp set in a different position of adjustment required by this diiference in width of the file.
In Fig. 1, a fiat file i is shown as having a familiar type of wooden handle 2. At the outer end of the file is a sheet metal strap 3 which has one end formed with a tapering portion at 4 and which is bent substantially parallel with the central portion of the strap to leave a space between the two portions suificient to admit the end of the thickest file with which the attachment is to be used. A bolt 5 having a nut 6 passes through alined perforations in the two parallel portions 3 and 4, opposite one edge of the file and on this 2 bolt is an eccentrically pivoted clamping washer I, the pivotal point and the size of the washer being such that it can be made to engage the edge of a file of any width with which the supporting bar is to be used.
The washer is, in effect, a wedge bent around the pivot bolt 5, and it is rotated on the bolt until its edge engages the adjacent edge of the file or other supporting member when the J-shaped strap is approximately perpendicular to the file or other member, thus resisting swinging movement of the strap when tension is applied to the saw.
The clamping washer I will be made thinner than the thinnest file to be used so that it will not prevent the bolt 5 and nut 6 from drawing the confronting faces of the strap portions into tight contact with the faces of the file.
As shown, one side of the tapering portion 4 lies substantially parallel with the adjacent side of the opposite portion, and thus, the folded end at 8 is not quite at right angles to the parallel opposite edges of the strap 3. The front edge of the'outer end of the strap is provided with a lug or tongue 9 formed by slitting the edge and bending the metal sidewise to form a projection for engagement with the front end of a saw blade, III, which is shown as having the usual eye H near its end.
At the opposite end of the file, a second supporting bar is shown as consisting of a sheet metal strap I 2 bent to form parallel sides spaced to receive the tapered shank of the file and having a bolt [3 and nut M to clamp the attachment securely in place. An outer end of one of the parallel members is bent inward at I5 toward the other member to retain the tension bolt it within the attachment. This bolt will have a Wing nut ll bearing against the rear edges of the strap p01- tions.
With the rear strap l2 clamped in place on the shank of the file, the outer supporting bar 3 will be placed on the free end of the file and the eccentric clamp I will be adjusted to set the bar at the desired angle of projection from the edge of the file, usually at right angles. The eye ll of the blade II] will be engaged with the projection 9, with the teeth extending forward as in Fig. 1 or rearward, as in Fig. 2, as may be desired. The eye at the rear end of the blade will then be engaged with the tension bolt I6 and the wing nut will be adjusted on the bolt to give the desired longitudinal tension on the saw blade.
The structure described above has been found in practice to be strong and rigid, readily assembled and taken apart, and efficient in use.
The substantially triangular shape of the frame thus constructed with a relatively short rear attachment as a supporting bar, places the file handle in line with the saw to give a direct pull or thrust longitudinally of the cutting edge. One face of the saw blade is in the same plane with the corresponding face of the file which forms the back of the frame and the user can observe the exact line of the cut and its plane by sighting along the face of the file.
The eccentric washer as a readily adjusted spacing means provides an easy and practical way of accommodating a single attachment to all ordinary sizes and shapes of flat files. Any standard length of saw blade can be used by providing a standard file of the same length, and the use of such a file as the back or principal portion of the frame avoids the expense and the weight of a separate saw frame. The relatively small and light attachments serving as the supporting bars save the space in a tool kit the separate frame would require.
While a specific embodiment of the invention has been illustrated and described for the purposes of the disclosure, it will be evident that many alterations in form, size, proportions, and details of construction and location of par-ts may be made by those familiar with the art, and it is my intention to cover all changes and modifications of the example of the invention herein described which do not constitute departures from the spirit of what is claimed.
1. A hacksaw assembly for mounting a hacksaw blade in operative position on a rigid supporting member, comprising two rigid straps, each strap formed with two substantially parallel portions spaced sufliciently to receive an end of the supporting member, means on each strap at one side of an edge of the supporting member to clamp the straps to the supporting member, a pivot mounted between the parallel portions of one of the straps, and a washer mounted eccentrically upon the pivot and adjustable angularly to engage the edge of the supporting member in a position to resist angular movement of the strap thereon.
2. An attachment for mounting a hack saw blade in operative position on a longitudinal supporting member, said attachment comprising two J-shaped straps each having a bolt passing through the opposing portions of the J at a sufficient distance from the base of the J to admit the end of the supporting member between the bolt and the base of the J, and a washer eccentrically pivoted on one of the bolts and rotatable thereon to engage the edge of the supporting member when the strap is set at the desired angular' position with respect to the axis of the supporting member, and said straps having means near their outer ends for engaging and tensioning the saw blade.
HOWARD HENDERSON FAUBION.
References Cited in the file of this patent UNITED STATES PATENTS Number Name Date 417,539 Bush Dec. 17, 1889 806,515 Baumgartner Dec. 5, 1905 1,028,230 Leonard June 4, 1912 1,158,092 Witter Oct. 26, 1915