US103952A - Improvement in saw-mills - Google Patents

Description

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@tutti @ittica Letters Patent N 103,952, dated June T, 1870.

'---v-wn-n-m IMPROVEMENT IN SAW-MILLS.

The Schedule referred to in these Letters Patent and making part of the same.

To whom it may concern.'

Be it knouhr that I, WILLIAM M. WILKIN, of Detroit, in the county of 'ayne and State of Michigan, have invented a new and useful Improvement in Mulcy-saw Hangings; and I do declare that the following is a true and accurate description thereof, reference being had to the accompanying drawing, and to the letters of reference marked thereon'and being a part of this specification, in which- Figure l is a front elevation oi' a pair of mnley saws hung in my improved hangings, and operated by one pitman as a gang l Figure 2 is a side elevation ofthe saine, showing the method of attaching the saws to the pitnian by my improved double buckle;

Figure 3 is aplan of my double muley guides;

Figure 4 is a side elevation of the lower end of a muley saw, showing the method of attaching my double yokes thereto; and Y Figure 5 isa diagram showing the advantage of employing two or three mnley saws in siding up a 4log ready for the gang.

Similar letters of reference indicate corresponding parts in each figure.

The nature of this invention relates to an improved method of hanging and operating mnley saws, and consists-` l First, in the novel construction of the guide-yokcs;

Second, in the arrangement of the double-forked buckles, connected by a cross-piece, showing a rectangular transverse bar and certain hooked yokes secured to the lower end of muley saws; and

- Third,in the arrangement of the saws, straps, yokes, and keys by which the saws are connected to the/transverse arm of' the saw-buckles, all as more fully described below.

slot cut therein. These slots are in the form of hooks,

which embrace the saw and straps'which are half dovetailed to receive them. rlhc yoke. is slipped over the cross-head, the saw is inserted in the slots and then is secured in place by driving a key, c, through the slots in each arm ofthe yoke, under the squared part ofthe cross-head and over the upper edge of the saw and its straps, as shown in tig. 2.

The body ot' the cross-head is of such. length that two or more saws may be secured thereto in the man ner described, and still perluit of the lateral adjustment of the saws to cut lumber of various thicknesses.

The .connection above described beingl of greater length from front to rear of the saw, gives the latter greater rigidity and steadiness when in motion than it would have weren single hook used for the purpose.

E'arc similar' yokes, two of which are attached to the lowerend of the saw in the manner above described.

F is the pitman, the construction and arrangement of which, and its attachment, are such that an oscillatory motion is comrmmicated to the saws in their reciprocation. Any arrangement of the hangings to produce this result I do not claim as my invention, but design to show that my method of attaching the saws to the pitmau is applicable thereto, equally as well as to au ordinary rig or hanging.

The upper ends of the pitman-forks are provided with guides, which reciprocate between the slides oi the lower mhley box.

dis the noddIe-pin,journaled in the lower the fork.

.G are two-forked buckles, between the ends of whose forks is a rectangular transverse bar, e, on which the lower edge of' the saw rests, the yokes E embracing both, and are secured in position by keys and gibs f f.

The two buckles are, rigidly held together by`a-long itudinal bar or cross-piece, g, which forms-a yoke withtheir lower ends. This yoke embraces the noddlefpiu d, whose body is squared as shown, when the buckles are connected to the pitmau by driving a key, h, through a slot in the tail of each buckle under the ncddle-pin.

,II are the mulcy guides, which are adjusted on the jaws I in the usual way.

J are guide-yokes, which are also adjustably secured to the jaws I. rlhcir straight baies or edges pass between the saws, where one overlaps. the other, as shown.

As cach saw wouhl he guided only on its outer face by the blocks II, on the inner faces ofthe straight parts of the yokes J I place. Vnue or more guides or spots, which consist oi' one or umrc'thicknesses ot' raw-hide, leather, or other suitable material, secured thereto by one or more copper rivets. Owing to their small size when reduced to scale in drawings, these spots are `not shown. y v` B v the above-described arrangement or' guides, the saws arc prevented from diverging from. a right line in either direction.

1t will readily be perceived that the saws maybe adjusted in their hangings, and their guides to them, so that lumber of various thicknesses maybe sawn.

Three or more saws may he hung in like manner part of 'frame secured to t-he jaws I, and movable guides se,

Vin said frame or in any other convenient manner.

cut, rig back, reset and take a second eut, to save ment of the double yokesE for connecting them in which case the guide-yokes-J are replaced by acured thereto between the saws, either through slots In'tig. 5 isshown one of the advantages of employing two or three saws in the manner described. InI siding up a log to prepare it for the gang, where two of my saws are used in one hanging, instead of taking o' a thick sla-b, to go to waste, or to make a board, I make but one cut, and with three saws I talee off a smaller slab and two merchantable boards, as shown in the diagram.

' Not only is this arrangementof the saws applicable to the purpose justl described, but is of equal value in stocking up, doubling, or trebling thcproduotof a set of mnley hangings, with but a tritiing addition to its first cost, and with asmall additional expenditure of' power :is-.compared with a single muley saw.

A single saw may be run inthe same hangings, by removing the guide-jokes J from the muley guides and adjust-ing the guPe-blocks; H'. l

This method of co1 iecting the saws to the pitmau permits of their ready ,djust-m'ent, and, by the employ-v thereto, great rigidity is secured to the saws while cutting.

I am well aware that several saws, hung in a gate or. sash, and reeiprocated by aI single pitman,vare not new, and while,V I expressly disclaim vthe invent-ion of What I do claim as my invention, and desire t0 Secure by Letters Patent, is-

1. 'Ihe guide-yokes J, constructed, arranged, and operating substantially as andiorl the purposeA setl forth.

2. The double-forked buckles G, connectedl by the purpose setforth. p

WM. M. WILKIN.

' Witnesses:

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