US2064606A - Jigsaw attachment for woodworking machines - Google Patents

Description

Dec. 15, 1936.

J. A. HIRTZ. SR

JIGSAW ATTACHMENT FOR WOODWORKING MACHINES Original Filed March 13} 1935 2 Sheets-Sheet 1 IN V EN TOR.

A TTORNE Y Dec. 15," 1936 -J. A. HIRTZ SR JIGSAW ATTACHMENT FOR-WOODWORKING MACHINES 2 Sheets-Sheet 2 Original Filed March 13, 1935 INVENTOR. BY

vmi g AT RNEY Patented Dec. 15, 1936 stereos PATENT OFFIQE JIGsAW ATTACHMENT Fonwoon- WORKING MACHINES.

Joseph A. Hirtz, Sn, MountOliver, Paz, assignor of one-half-tojEllsworthrJ. Smith, Sn, Mount Oliver, Pa.

Original applicationMarchB; 1935, Serial No. 10,827. Divided and this application April 1'7,

1936, Serial No. 74.947

5 Claims.

- My 'invention'consists of an improvement in woodworking machines and is a division of my prior application Ser. No. 10,827, filed Mar. 13, 1935.

The particular portion of the original application herein involved relates to the jig saw construction therein disclosed, and is illustrated and described herein as an operative part of the whole original 'machine.

The machine as a whole comprises a suitable supporting frame provided with a cover top or table, preferably adjustable to varying inclination; and capable of being elevated to inoperative position for access to the interior.

The jig saw unit, as to its upper frame, is so mounted as to be capable of adjustment towards or'from'the operating plane of the table top and to be actuated through driving connections with a prime mover, with suitable clutch mechanism and various'co operating and other elements, as hereinafteri described. 7

Referring to the drawings:-

Fig. 1 is a partial plan viewof the machine showing the jig saw in position for use, in connection with a similarly mounted band saw;

Fig. 2"is' a vertical cross section on the line'- II--II of Fig. 1;

Fig; 3is a similar'sectional view on the line III=-III of Fig. 2;

Fig. 4 is a similar sectional view onthe line IV-IV of Fig. 5; I

Fig. 5 is a partial plan View of the driving connections for the jig saw;

Fig. 6 is a sectional view of the same, extended, on the line VIVI of Fig. 5.

Referring to the drawings, the supporting framework 2 is generally rectangular, having side and end walls and a suitable mounting base for rigid placement. The frame is preferably made of a single casting and having at its upper portion flat supporting side edges and end bearing members 3 for the adjustable table 4. The latter is hinged to one end portion of the frame, and is capable of being entirely raised out of the way and supported by any suitable means.

The jig saw frame 48 is hingedly mounted for longitudinal and tipping movement on a shaft 43 mounted alongside the main frame. It is provided with a flat base 49 by which, when swung inwardly for work, it rests on an inwardly extending shaft 50a of the main frame, around which the main plate 4 closely fits, as at 5|.

Frame 48 extends laterally by a lug or gudgeon 52 pivotally connected by tightening bolt 53 to a sliding block 54 engaging the shaft 43. Block 54 functions to maintain the frame 48 in position and may be tightened on the shaft by bolts or screws 45.

'I'husif'desired frame 48 may be swung slightly one way or the other and then secured by bolt 53 to maintain it and the jig saw in vertical alinement.

Frame 48'arches over across the machine and is provided at its terminal with a housing 55 surrounding a reciprocating stem 56.

Said sternv is mounted'in extensions 51 of the frame, providing bearings therefor, and for spring 58 engaging a' flange 59 of the stem and tending to exert constant reaction upwardly for reverse movement of the saw in its alternating stroke action.

At its lower end stem 56 is provided with a socket 60 engaging a cross pin at the upper end of saw blade 6|, for easy and quick insertion and removal. The saw blade 6! extends downwardly through an opening 62 of the coverplate 4 and is similarly connected by cross slot 63 with a stem 64 of the reciprocating pin or bolt 65. The latter ismounted for vertical movement in a housing or casing 66 of a supporting bearing761 at one side of the pivoted frame member 9.

Bolt is connected through vertical slot 68 by bolt 69 with a pitman 10, the other end of which is connected by bolt or pin 1| with a crank wheel 12 of shaft 13 mounted in the lower portion of bearing 61. Shaft 13 extends across and is-mounted' in a similar bearing'in the opposite arm of frame 9 and is provided with a grooved pulley 14 connected by a belt 15 with a similar pulley 16 which is fixedly connected with the plural groove pulley 28, so that all three operate together.

It will thus be seen that when pulley 28 is driven from a cross shaft or prime mover, pulleys 16 and 14 will also be driven, and the latter may be connected or disconnected, as desired.

For operating the jig saw, pulley 14 is provided with a clutch 11 freely rotatable on shaft 13, and a clutch 18 in spline engagement with said shaft is provided with a lever 19 pivoted at 80.

As shown in Fig. 6, connected triple groove pulleys 28 and 16 are driven from the main shaft 3| by an individual pulley 3! Jig saw 6i having been connected by its terminals, as in Fig. 2, and adjusted for vertical movement, it will be actuated by shaft 13 and its crank disk 12 so long as clutch engagement 1118 is maintained.

Outer side shaft 43 is provided with an adjustable ring abutment 8| provided with a set screw or the like, for limiting sliding movement on shaft 43 whereby to define the operative position of arm 48 when it is to be located in position for its particular work.

Similarly mounted for longitudinal and tipping movement on shaft 43, may be located a band saw frame 39, as in Fig. 1, resting by its base 40 on an inwardly extending shelf of the main frame, around which the main top plate 4 closely fits.

The construction and operation of the jig saw member of the composite machine herein presented and disclosed in my former application will be readily understood and appreciated by all those familiar with wood working machinery. The entire frame and its parts, upon disconnection from the blade 6|, is readily dispensed with until further need, leaving the table free and open for other Work.

The manufacture and application of the jig saw construction to a multiple wood working machine, or as a single installation, is comparatively simple, cheap, and capable of location in a limited space.

What I claim is:

1. In combination with a fiat top sup-porting table having an upper supporting edge portion and a lateral horizontal hinge rod below said edge portion, a laterally swinging jig saw frame hinged on said rod for vertical outward and inward swinging movement thereon having a base engageable with said edge portion for erection thereon and provided with a reciprocable jig saw spindle, a lower reciprocable jig saw spindle and actuating means therefor, a jig saw connecting said spindles, actuating means therefor, and an intervening work supporting platform having a clearance opening for the jig saw.

2. In combination with a supporting frame having an upper supporting edge portion and a lateral hinge rod, a laterally swinging jig saw frame pivotally connected with a sliding bearing hinged on said rod and having a base engageable with said edge portion for erection thereon and provided with a reciprocable jig saw spindle, a lower reciprocable jig saw spindle and actuating means therefor, a jig saw connecting said spindles, means for imparting driving power to said actuating means and for raising and lowering the same, and a work supporting platform between the spindles having a clearance opening for the jig saw.

3. In combination with a flat top supporting table having an upper supporting edge portion and a. lateral horizontal hinge rod below said edge portion, a laterally swinging jig saw frame hinged on said rod for vertical outward and inward swinging movement thereon having a base engageable with said edge portion for erection thereon and provided with a reciprocable jig saw spindle having a re-acting spring and a saw connecting terminal, a lower reciprocable jig saw spindle having a saw connecting terminal, a jig saw connecting said spindles, actuating means for the lower spindle provided with an operating shaft, a vertically movable supporting frame therefor and means for rotating said shaft, and a work supporting platform between the spindles having a clearance opening for the jig saw.

4. In combination with a fiat top supporting table having an upper suporting edge portion and a lateral horizontal hinge rod below said edge portion, a laterally swinging jig saw frame hinged on said rod for vertical outward and inward swinging movement thereon having a base engageable with said edge portion for erection. thereon and provided with a reciprocable jig saw spindle having a re-acting spring and a saw connecting terminal, a lower reciprocable jig saw spindle having a saw connecting terminal, a jig saw connecting said spindles, actuating means for the lower spindle provided with an operating shaft, a vertically movable supporting frame therefor and means for rotating said shaft, means for locating said frame in variable vertical positions, and a work supporting platform between the spindles having a clearance opening for the jig saw.

5. In a woodworking machine, in combination with a main supporting frame having an apertured work surface top and a lateral hinge rod, a laterally swinging jig saw frame hinged thereon for vertical erection on the edge of the work top and vertical outward and inward swinging move ment on the hinge rod having an upper jig saw spindle, a transverse hinge shaft, a frame hinged thereon provided with a rotatable shaft having a driven pulley, driving means on the hinge shaft geared with said shaft, a lower jig saw actuating spindle mounted on the hinged frame in operative connection with the driven shaft, and means for locating the hinged frame at varying positions for operative and inoperative relation to the upper jig saw spindle.

JOSEPH A. HIRTZ, SR.

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