US478431A - Mortising-machine - Google Patents

Description

(No Model.)

L. HOUSTON.

MORI'ISING MACHINE. Y I

No. 478,431. Patented July 5, 1892.

i. MM

ma nunms PETERS c0, vho'ro-|.|wc., WASHINGTON n c UNITED STATES PATENT OFFICE.

LEVI HOUSTON, OE MONTGOMERY STATION, PENNSYLVANIA.

MORTISING-MACHINE.

SPECIFICATION forming part of Letters Patent No. 478,431, dated July 5, 1892.

Application filed December 12, 1890- Serial No. 374,490. (No model.)

To all whom it may concern.-

Be it known that I, LEVI HOUSTON, a citizen of the United States, residing at Montgomery Station, in the county of Lycoming and State of Pennsylvania, have invented certain new and useful Improvements in Mortising-Machines, of which the following is a specification.

In machines of this general character the table or bed upon which the work rests or by which it is supported is raised and heldin its raised position by the depression of a treadle operated by the foot of the attendant, and while the table or bed is thus held in its raised position the work is subjected to the action of a reciprocating tool, which latter imparts considerable jar and vibration to the bed or table and to the foot of the operator resting upon the treadle; and it is to do away with this constant jar or vibration upon the operators foot that the present invention is designed.

I desire to state here that the means shown for raising the table or bed are not in themselves new, having been previously employed in machines where there was no reciprocating tool or cutter, and consequently no such jar or vibration to overcome as exists in a mortising and similar machines employing a reciprocating tool, to which class of machines my present invention is confined.

In the drawings, Figure 1 is a perspective View of my improved mortising machine; Fig. 2, a vertical sectional view from front to rear, with parts broken away.

A indicates the main frame of the machine; B, the bed or work-supporting table; 0, the longitudinally-reciprocating tool or cutter, and D the treadle or foot-lever, piv oted to lugs or cars a, projecting from the front face of the machine. The treadle or lever is slotted or bifurcated and is provided on its under face with a series of notches or steps b, with which a -shaped block 0, secured to the end of a chain, cord, or belt or other flexible connection E, is designed to engage. This chain or other flexible connection E extends upward over a wheel or pulley F, journaled upon a pin or bolt d, car ried by lugs e, projecting from the front face of the machine above the lugs a a, as shown in Figs. 1 and 2.

It is of course immaterial whether the wheel or pulley F turns loosely upon the pin or bolt cl or is provided itself with journals to turn in the ears or lugs e, which would thus become bearings.

Chain or connection E, after passing from the foot-lever or treadle over the wheel or pulley F, passes downwardly, where it is connected with the forwardly-extending footpiece of the lifting-rod G of the bed or table.

When the operator presses down upon the outer or free end of the treadle or lever, the inner end of the chain, which is connected with the rod G, extending down from the bed or table, will, acting through the rod, raise the table or support, the latter being held in its elevated position until the foot is removed from the treadle or the treadle allowed to resume its normal position. While the table is held in its elevated position by reason of the operator keepinghis foot upon the treadle the reciprocating tool 0 acts upon the work on the table and imparts to the table a jar or vibration, which under former constructions was transferred directly to the treadle or lever, upon the inner end of which the lifting-rod rested. Under the present arrangement, however, the jar or vibration is trans mitted first to the chain which sustains the lower end of the lifting-rod instead of the treadle, with the result that the jar or vibra tion heretofore imparted directly, as it were, to the treadle is now thrown onto the chain and its supporting wheel or pulley and to the main frame, in which the wheel or pulley is journaled or supported.

By distributing the strain upon the chain, its supporting-wheel, and the main frame it will be seen that the jar orvibration given to the treadle willbe practically ml, for before any motion or vibration can be imparted to the treadle or lever it will be necessary to overcome the resistance of the wheel or pulley against turning arising from the weight of the bed or table being thrown upon the said pulley.

Having thus described my invention, what I claim is- 1. In a mortising 01' similar machine, the main frame, a wheel or pulley also journaled combination, with a mainframe, of a recipin the main frame, but above the treadle, and rocating tool, a bed or work-table movable a flexible connection passing over the wheel 15 toward and from the tool, a treadle, and a or pulley and secured at its ends to the treadle 5 flexible band or cable connecting the treadle and work-table, all substantially as shown and the bed or table and passing over an inand described. tel-mediate support, allsnbstantially as shown In Witness whereof I hereunto set my hand and described. in the presence of two witnesses.

2. In a mortising or similar machine, the LEVI HOUSTON. 1o combination, with a main frame, of a recipiitnseses:

rocating tool, a bed or table movable toward L. (J. KINsEY,

and from the tool, a treadle pivoted in the R. A. SEOHLER.

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