US2309816A - Folding pocket hack saw - Google Patents

Description

Feb. 2,` 1943. v G. ALLEN FOLDING POCKET HAcKsAw Filed yJun@ 27, 1941 2 Sheets-Sheet 2 INVENTQR, G/FFo/m ALLE/Y A-rToR/vfk Patented Feb. 2, 1943 UNITED STATES PATENT OFFICE FOLDING POCKET HACK SAW Gifford Allen, Grand Junction, Colo.

Application June 27, 1941, Serial No. 399,999

Claims. (Cl. 145-33) MThis invention relates to a folding pocket hacksaw, and has for its principal object the provision of a hacksaw frame which will be exceedingly strong and rigid when in use, and which can be quickly and easily folded into a small, compact article when not in use so that it may be conveniently carried inthe pocket.

. Another object of the invention is to provide highly efficient and positive means for attaching the hacksaw to its supporting frame.

-Other objects and advantages reside in the detail construction of the invention, which is designed for simplicity, economy, and eliciency. These will become more apparent from the following description.

In the following detailed description of the invention reference is had to the accompanying drawings which forms a part hereof. Like numerals refer to like parts in all views of the drawings and throughout the description.

In the drawings:

- Fig. 1 is a side View of the improved folding hacksaw illustrating it in the open position ready for use;

Fig. 2 is a fragmentary sectional view of the handle portion thereof; this section is taken on the line 2 2, Fig. 3;

Fig. 3 is a front end view thereof;

Fig. 4 is a detail view of the saw tightening block employed in the improved saw;

;Fig. 5 illustrates the handle portion of the device with the side pad, side plate and knife sheath removed illustrating it as it would appear when folded' for carrying;

^ Fig. 6 is a similar View illustrating the sheath in place and the hacksaw blade in place therein;

Fig 7 is a longitudinal section through the handle, taken on the line 'I-'I Fig. 6, with the blade and supporting arm removed.

Fig. 8 is a detail cross-section taken on the line 8-8 Fig. 6; and

Fig. 9 is a detail cross-section taken on the line 9-9 Fig. 5.

The improved hacksaw comprises a metal handle form I0, closed at each side by means of relatively thin side plates I I. The side plates are covered with hand grip pads 35. The handle form is provided with an inclined receiving socket 43 extending throughout its length and opening at the top thereof. A blade-supporting bracket I2 projects from the front edge of the handle form Il). 4 The socket 43 is designed to slidably receive a blade arm I3. The arm is provided with a hook member I5 which engages a stop pin III as the arm is withdrawn. The stop pin acts as a pivot about which the arm swings to its operative position.

The inner extremity of the arm contains -az notch I6 into which a latch member II extends to hold the arm I3 in the extended position. -The suitable rivets or screws 22.

The outer extremity of the arm I3 is provided with a hinged saw engaging member 23 mounted on the arm by'means of a hinge pin 24. The member 23 is held at a predetermined angle- I from the arm I3 by means of a hooked latchmember 25 which is in turn mounted on a latch pin 2li on the arm I3. The hook of the latch member 25 engages in a suitable receiving notch 36 in the saw engaging member 23 to hold it at its fixed angle.

A typical hacksaw blade is illustrated at 21 of any usual standard type having pin openings in its ends. At its outer extremity the blade 21 slips into a receiving slot in the free extremity of the saw engaging member 23 and a locking pin 28 is inserted through the opening in the outer end of the blade. The locking pin is carried in a swinging hinged member 29 which is p-ivoted on the member 23 so that it may be swung to one side to release the blade 2l.

Theother extremity of the blade is detachably secured in asliding member 30 mounted in the blade bracket I2. The sliding member issplitat its outer extremity to receive the blade 2l and is longitudinally grooved along its top and bottom to form a V-shape, guide groove 32 to guide it into the bracket I2. The bracket is provided with'a receiving slot for the member 30 and the parallel side edges of the slot are ridged to enter the groove 32 as shown in Fig. 9. The sliding member is moved back and forth by means of a threaded shaft 33 which projects from the member 30 into a receiving pocket in the handle form IE. The shaft 33 extends through a knurled nut 34. The nut 34 carries a flanged hub 3| which enga-ges in notches in the form IIJ to prevent axial movement of the nut. Therefore by rotation of the latter the saw blade may be placed under tension. The member 30 carries a hinged tab 3l having a blade pin 38. The tab 3l is indented in the side of the member 3i) and when it is closed the pin 38 extends through the pin hole in the end of the blade 21.

A relatively flat channel member or sheath 39 is secured on the outer face of one of the side plates Il, the handle pad 35 at that side being internally grooved to surround the sheath. The sheath is for receiving the saw blade when not in use. The sheath is provided with a longitudinally extending front bar 4b against which the teeth of the saw may rest. Ears 4I project from the sheath to secure the bar 40 in place and to engage the screws 22 to hold the sheath in place. It will be noted that the sheath is spaced from the bar 40 to allow the side set in the saw teeth to project. The entrance opening of the sheath may be split as shown at 42 to allow the upper edge to frictionally engage the saw to prevent it from falling from place.

When it is desired t fold the saw the nut 34 is loosened, the hinged members 29 and 31 are opened to release the blade 21 from its pins 28 and 38. The latch 25 is then released and the member 23 is folded against the arm i3. The latch I1 is then released and the outer extremity of the blade arm is raised so that its inner extremity may be slid into the receiving socket Il as shown in Figure 5. The blade 21 is then inserted in the sheath 39 to form a compact unit of minimum size which may be easily carried in the pocket.

While the invention has been described as particularly applicable to a pocket hacksaw, it is not, of course, limited to this specic use as it will be found valuable with any type of saw and in any size to which such a construction can be applied.

While a specific form of the improvement has been described and illustrated herein, it is desired to be understood that the same may be varied, within the scope of the appended claims, without departing from the spirit of the invention.

Having thus described the invention, what is claimed and desired secured by Letters Patent is:

l, A folding hacksaw comprising: a handle member having a longitudinally extending socket; an arm member slidably mounted in said socket so that it may be slid lengthwise into or withdrawn from said socket; means for limiting the extent of withdrawal of said arm, said latter means serving as a pivot to allow the arm to be turned to a pre-set projected position; a latch member in said handle member engaging said arm in the latter position to lock the same in place; a saw engaging member extending from the-outer extremity of the arm to a position opposite the handle member; and means for securing a saw blade between the saw engaging member and the handle member'.

' 2. A folding hacksaw comprising: a handle member having a longitudinally extending tubular socket; an arm member slidably mounted in said socket so that it may be slid lengthwise into or withdrawn from said socket; means for limiting the extent of withdrawal of said arm, said latter means serving as a pivot to allow the arm to be turned to a pre-set projected position; a latch member in said handle member engaging said arm in the latter position to lock the same in place; a saw engaging member extending from the outer extremity of the arm to a position opposite the handle member; a latch member engaging said saw engaging member when the latter is turned to a predetermined angle; and means for securing a saw blade between the saw engaging member and the handle member.

3. A folding frame for hacksaws comprising; a handle member; a tubular receiving socket extending longitudinally within said handle member and opening to one extremity thereof; a blade arm freely slidable lengthwise of said socket and projecting from the open extremity thereof; a hook member adjacent the inner extremity of the forward edge of said blade arm; a pivot pin adjacent the open extremity of said socket in the path of said hook member to be engaged by the latter to limit the withdrawal of and to serve as a pivot for said arm to allow the latter to be swung forwardly from the axis of said socket; and a blade supporting member hingedly mounted on the outer extremity of said arm so as to project downwardly therefrom forwardly of said handle member, said frame being. adapted to support a saw blade between the' opposed free ends thereof.

4. A folding frame for hacksaws comprising: a handle member; a tubular receiving socket extending longitudinally within said handle member and opening tol one extremity thereof; a blade arm freely slidable lengthwise of said. socket and projecting from the open extremity` thereof; a hook member adjacent the inner extremity of the forward edge of said blade arm; a pivot pin adjacent the open extremity of said socket in the path of said hook member to be engaged by the latter to limit the withdrawal of and to serve as a pivot for said arm to allow the latter to be swung forwardly from the axis of said socket; a blade supporting member hingedly mounted on the outer extremity of' said arm so as to project downwardly therefrom for wardly of said handle member, said frame being adapted to support a saw blade between the opposed ends thereof, a latch member positioned to engage the inner extremity of said arm when the latter is rotated about said pivot pin to maintain said arm in its angular position; and meansv cn the exterior of said handle member operatively connected with said latch member to release the latter from engagement with said arm.

5. A folding frame for hacksaws comprising: a handle member; a tubular receiving socket extending longitudinally within said handle member and opening to one extremity thereof; a.y blade arm freely slidable lengthwise of saidsocket and projecting from the open extremity thereof; a hook member adjacent the inner extremity of the forward edge of said blade arm; a pivot pin adjacent the open extremity of saidv socket in the path of said hook member to be engaged by the latter to limit the withdrawal of and to serve as a pivot for said arm t0 allow the latter to be swung forwardly from the axis of said socket; a blade supporting member hingedly mounted on the outer extremity of said armsoY GIFFQRD ALLEN.

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