US97040A - Improvement in blind-mortising machines - Google Patents

Description

matted 5mm @sont @Witte TO HIMSELF AND AARON H. ORAGIN, OF SAME PLAGE,

Letters Patent N 97,040, dated November 23, 1869.

IMPROVEMENT IN BLIND-MORTISING- MACHINES.

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

To all whom. it may concern.- f

Be it known that I, MARTIN BUCK, of Lebanon, in the county'of Grai'ton, and State of New `Hampshire, have invented a new and improved Blind-"WortisinglyIachine; and I do hereby declare thatV the following is a full, clear, and exact description thereot, which will enable others skilled in the art to make and use -the same, reference heilig had to the accompanying drawing, forming part of this specification.

This invention relates to improvements in machines for boring and mortising blinds, such as patented to Leonard \Vorcester, July 5, 1859, No. 24,688, and has for its object to provide certain improvements calculated to increase the'eiiiciency ofthe same.

The invention consists iu arranging the levers which move the slides carrying the stiles to be bored and inortised to and from the boring or mortising-to0ls,.

for adjustment, so that the. said slides may have a greater or less movement, as required by the nature of the' work.

It also consists in an arrangement of interchangeable ratchet-bars with ratchet-teeth of differentpitch for val-'ying the movement ot' the stiles past the cutter, for diiferent kinds of work. It also consists in an adjustable arrangement of the reciproca-ting boring or mortising tool-carrying carriage for varying the. angle otl the slots.

It also consists in an improved construction of mortising or slotting-tool, all as hereinafter more fully spcritied.

Figure 1 represents a plan view of the machine which is the subject ot' my improvements.

Figure 2 represents a sectional elevation of the same, taken on the line oi'tig.1.

Figure 3 represents a sectional detail, taken on the line y y.

Figure 4 represents my improved mort-ising-tool, in sidevew and longitudinal section.

Similar letters of reference indicate corresponding parts.

A represents two carriages, provided with grooved,

blocks, l, through which the slides C, carrying ratchet-bars O', to which the blind stiles to be bored or mortised are clamped, move across the said carriages to feed the stiles along past the nxortising and boring tool D.

These carriages A, are. moved back and forth by vibrating levers E, set into motion by calns F, on the shaft G, the said cams having grooves into which pins on the ends ofthe levers E take. g

These levers are pivoted at H, and have hitherto been madc unadjusta-ble.

I now propose to provide for these levers adjustable pivots or fulcra for the purpose ot' varying the movements of these carriages as required by the various kinds and dimensions of work which these machines are required to do, and which I have found in practice that is is very important to be able to do.

InI this example I have represented a series ot' pivot-bolt holes on the said levers, through any one of' which the bolt may be made to pass, by adjusting the levers back or forth; but I contemplate various other-methods of adjusting them, as slotting they said levers to work on the furcrul'n-pins, and arranging the latter to be moved back and forth, or other wellknown methods may be used.

The bars O', to which the stiles are clamped, to be fed along pastvthc tool, are moved intermittiugly by pawls I, pivoted to a sliding block, K, moved back and forth by a tappet- L, on the shaft G, working 'against the projection M, for throwing it back, and

the projection N for throwing forward, the said pawls taking into ratchet-teeth on the said bars.

This arrangement only admit-s of moving thc stiles a stated distance, which is', ,not suited to all work. I have, therefore, provided for ,dciaehably connectlngr the rack-bars O', so that bars having notches equal in length to the throw of the-'pawls maybe used, 'or they maybe slightly more than one-third the distance, so that they will be moved the dist-ance ot'two notches,`or slightly more than half the throw, so as to he moved the distance of one notch, and other like adjustments may be made, so that any required variation of throw may be effected.

The ratchet-bars C may be made of wood, metal,

or any other substance, and may be connected by screws, clamps, or other suitable means, to the slides C, in anyway, for ready attachment or detachment.

The boring and mortising-tool 'D is borne in a rcvolving spindle O, mounted on an inclined reciprocating carriage 1),-deriving motion from a crankshaft, Q.

rlhis carriage is reciprocatcd when cuttingmortises, and carries the revolving tool back and forth-against' the face ofthe stiles, at the same time they are pressed up by the levers E against the tool, making an elongated mortise or slot ot' the same inclination as tha ot' the guides ot' the carriage l.

Then the stiles are to he .bored only, the carriage F is not rcciprocatcd, but the tool D is rotated, as it is also when nlortising.

It receives motion by a belt from the bclt\\'lieel It.

My improvement in the arrangement oi' the borlng and mortising-tool carriage consists in providing adjustable guides S for thc saine, whcrcoy the angle oi the slots may be vaiied as required by changing the said guides.

In this cose, Ihnve represented the said guides as 'nf downto an edge, :is represented in iig. 4,- which provides in 'n.chenp way a. very eficient cutting-tool lor the purpose.

Hnvingthns described my invention,

What I ein-im is new, and desire to secure by Letters lnten'r, isl 1j A blind-mortsin.: machine, provided with slides C, :ind ratchet-bars C', having notches thereon of differenti piteh. :is :ind for the purpose specified.

2. A blimi-inorrising nmchne, provided with vihmting,r m'nls E, for varying the throw of t-he carriages,

as shown und described.

MARTIN BUCK.

Witnesses WILLIAM B. WEEKS, ,WiL F. DAvs.-

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