Patent GB-465667-A (GB)
Title: An improved wood-working machine, particularly a mortising or boring machine
IPC: B27F5/06
Filed: 1935-11-21
Abstract: 465,667. Mortising and boring machines. GODDARD, J. H. Nov. 21, 1935, No. 32298. [Class 145 (i)] [Also in Group XXII] In a mortising-machine, (which may also have provision for the alternative mounting on the (cutter-head of a boring-tool) of the type comprising a work-table or holder 18 carried by the machine body and a vertically-movable cutter head 12, means are provided to effect relative lateral movement between the cutter-head and table to permit when the latter is, as shown, removed from its position beneath the cutter, a relatively deep work-piece, such as a door, to be operated on. The machine shown comprises a counterbalanced cutter-head 12, vertically movable by a hand-lever 13 on guides on the standard 10, and carrying a motor 14. A power chisel may be substituted for the chain mortiser 15. The normal work-table 18, having provision for to-and-fro and fore-and-aft movements. and, if desired, vertical movement also, is mounted on a support 17 carried by a split sleeve 19 rotatably mounted on a lower cylindrical portion 16 of the standard, so that by rotating the sleeve through 180‹ the table is carried from its operative position beneath the cutter to the inoperative position shown in Fig. 2. The same movement also brings an alternative holder, for carrying a doorframe, into operative position. The holder shown comprises a fence 29 against which the upper part of the work 31 is held by a clamp 37, and a bar 30 carrying rollers 36 on which the lower edge of the work rests. The fence 29 and bar 30 are carried respectively by the upper and lower ends of vertical bars 28 rotatably mounted in parallel motion links 27 pivoted to lugs 25 on the sleeve 19, the work being adjusted in a fore-and-aft direction in relation to the tool by swinging the links. To allow longitudinal adjustment of the work, the fence comprises a front portion 29b slidable in guides on a rear portion 29a, adjustment being effected by a quadrant 34 pivoted on the part 29a and engaging a rack 33 on the part 29b. The screw of the clamp 37 is carried bv an arm 38 rotatable on a shaft 39 carried by the part 29b of the fence. The bar 30 carrying the work-supporting rollers 36 may be bolted to the upright bars 28 at any one of a number of vertical positions determined by a series of holes in the latter. The sleeve 19 is vertically-adjustable on the standard 16 by means of a hand-operated pinion engaging a rack 40 held in a vertical slot in the sleeve and rotatable with it about the standard, but restrained from vertical movement by upper and lower abutments extending round the standard and engaging the ends of the rack. A spring-pressed plunger engaging diametrically-opposite grooves 46 in the standard, and withdrawable by a handle 47, locates the sleeve when either the table 18 or the fence 29 is in operative position below the tool. Alternative means for holding deep work-pieces are described, in which the upper part of the work is held by two clamps, each carried by a horizontal forwardly-extending rod longitudinally adjustable in a bracket which is vertically adjustable on a slotted flange projecting from the side of the standard. The lower edge of the work rests on brackets adjustably mounted on vertical guides on the sleeve 19 and hinged so that they may be folded up to an inopetive position.