US2664756A

US2664756A - Drill press

Info

Publication number: US2664756A
Application number: US275341A
Authority: US
Inventors: William L Fismer
Original assignee: Individual
Current assignee: Individual
Priority date: 1952-03-07
Filing date: 1952-03-07
Publication date: 1954-01-05
Anticipated expiration: 1971-01-05

Description

Jan. 5 1954 w. FISMER 2,664,756

DRILL PRESS Filed March 7, 1952 INVENTGR WILLIAM L. FISMER Patented Jan. 5, 1954 UNITED STATES PATENT OFFICE DRILL PRESS William L. Flsmer, Verona, N. J.

Application March 7, 1952, Serial No. 275,341

' 7 Claims. (01. 74-217) Fig. 1 is a partially sectioned side elevation of a standard type of drill press incorporating one form of the invention;

Fig. 2 is a horizontal section on the line 2--2 of Fig. 1;

Fig. 3 is a side elevation of a modified form of construction, on an enlarged scale;

Fig. 4 is a horizontal section on the line 4-4 of Fig. 3; and

Fig. 5 is a broken out side-elevation of another form of construction.

In the form of the invention illustrated in Fig. 1, the main components of a standard type of drill press will be recognized, including the base l0, column II and head assembly I2, the latter carrying a rearwardly projecting bracket shaft l3 to the end of which is secured a bracket According to the present invention, the bracket I 4 is utilized to provide support for a countershaft and a drive motor therefor, provision being made for connecting the motor shaft and countershaft to drive the latter at different speeds, the countershaft carrying a multiple step pulley for driving the drill spindle.

In this first form of the invention, the motor and countershaft assembly comprise a single unit, the base l5 of the motor l6 being secured to a countershaft housing I! and the latter pivotally supported at I8 on the bracket l4. Journaled in and projecting above and below the housing I1 is a vertical countershaft l9, carrying

multiple step pulleys

20, 2| at its upper and lower ends, respectively; and on the lower end of the motor shaft is a multiple stepped sheave 22, belt connectible with pulley 2 I. As illustrated, pulley 20, by means of belt 23, is variously connectible with the multiple stepped spindle pulley 24. As will be understood, the belt 23 can be readily removed by raising the motor-housing unit about its pivot l8. The belt is held under normal working tension by the depending motorhousing unit, the tension being limited by the abutment of the unit against the face of bracket H. The pulley 2| at the lower end of the countershaft being flat faced, belt 25 can also be readily removed. v i

By the arrangement described, a great variety of spindle speeds is made available and it will be recognized that the entire head and drive assembly can be freely rotated about column I l and also raised and lowered at will.

In this preferred form, mechanical means are provided for effecting the raising and lowering of the head, under the control of a manually operable crank 26 shown as'located beneath the bench top 21 on which the drill press base II is seated. In this illustrative arrangement, rods 28 extend upwardly from the head and are connected at their upper ends by a cross bar 29 which has threaded engagement with a screw 30. The latter extends down through column H and through the bench top 27 for actuation by crank 26.

In the form of the invention illustrated in Figs. 3 and 4, provision is made for mounting the motor and countershaft housing so that they are relatively movable, thereby rendering it more convenient to utilize V-pulleys at the lower ends of both the motor shaft and the countershaft and providing for adjustment of the tension of the belt connecting these two shafts.

In this form, a bracket I4 is likewise secured to bracket shaft I3 and a countershaft I9 is journaled in a housing [1. At its upper end, the latter is pivotally mounted on a pivot pin l8 supported by bracket I l. The base l5 of motor l6, however, is not attached to the countershaft housing but to a bracket 3!, the arms 32 of which (Fig. 4) are pivotally mounted on the outer ends of pivot pin I8; At its lower end, motor bracket 3| carries an adjusting screw 33 which abuts the countershaft housing and is adjustable to move the motor relatively to the housing. As before, the entire housing-motor assembly is rotatable about the axis of pivot pin I 8 to permit of the ready removal of the drive belt 23.

The Fig. 5 arrangement differs only in that the motor bracket and countershaft housing pivot about different axes. The countershaft housing I1 is pivoted at l8 on bracket 14" and motor bracket 3! is pivotally mounted at 34 on the countershafthousing. As in the Fig. 3 form, the motor is thus movable relatively to the countershaft and both are movable bodily about pivot axis I8".

In the light of the foregoing description, the following is claimed:

1. In a drill press of the kind including a column, a spindle, spindle head movable on the column, a bracket shaft projecting from the latter and a bracket mounted on the shaft, the improvement which comprises: a vertical countershaft; a countershaft housing; a motor having a downwardly projecting vertical shaft; belt-connected, multiple step pulleys on the lower ends of the motor shaft and countershaft and on the upper ends of the countershaft andspindle; a horizontal pivot member on the said bracket about which the housing and motor are bodily movable as a unit, the axis of the pivot member lying at right angles to the axis of the bracket shaft on the column side of the housing and motor.

2. In a drill press of the kind including a column, a spindle, spindle head movable on the column, a bracket shaft projecting from the latter and a bracket mounted on the shaft, the improvement which comprises: a vertical countershaft; a countershaft housing; a motor having a downwardly projecting vertical shaft; belt-connected, multiple step pulleys on the lower endsof the motor shaft and countershaft and 'on the upper ends of the countershaft and spindle; said housing and motor being supported from said bracket with freedom for pivotal movement relative to one another, about an axis lying at right angles to the axis of the bracket shaft on the column side of the housing and motor.

3. In a drill press of the kind including a colment which comprises: a vertical countershaft; a

countershaft housing; a motor having a downwardly projecting vertical shaft; beltconnected, multiple step pulleys on the lower ends of the motor shaft and countershaft and on the upper ends of the countershaft and spindle; said housing having a horizontal pivotal mounting on the said bracket, and said motor having a horizontal pivotal mounting on the housing.

4. In a drill pres of the kind including a column, a spindle, spindle head movable on the column, a bracket shaft projecting from the latter and a bracket mounted on the shaft, the improvement which comprises: a vertical countershaft; a countershaft housing; a motor having a downwardly projecting vertical shaft; belt-connected, multiple step pulleys on the lower ends of the motor shaft and countershaft and on the upper ends of the countershaft and spindle; said housing and motor being independently pivotally sup ported from the bracket by a single pivot pin.

5. In a drill press of the kind including a column, a spindle, spindle head movable on the column, a bracket shaft projecting from the latter and a bracket mounted on the shaft, the improvement which comprises: a vertical countershaft; a countershaft housing; a motor having a downwardly projecting vertical shaft; belt-connected, multiple step pulleys on the lower ends of the motor shaft and countershaft and on the upper ends of the countershaft and spindle; said housing and motor being supported from said bracket with freedom for movement relative to one another about a common pivot axis.

6. In a drill press of the kind including a column, a spindle, spindle head movable on the column, a bracket shaft projecting from the latter and a bracket mounted on the shaft, the improvement which comprises: a multiple speed drive unit adjacent the bracket on the side thereof remote from the column and including a vertically disposed countershaft housing, a countershaft therein, a motor on the side of the housing remote from the column, the motor having a downwardly projecting vertical shaft; belt-connected multiple step pulleys on the lower ends of the motor shaft and countershaft and on the upper end of the countershaft and spindle; a horizontally disposed pivot member about which the drive unit is bodily movable, the pivot member being supported on the upper part of the bracket athwart the bracket shaft and on the column side of the unit, whereby the weight of the unit acts in a direction to tension the belt connection between the pulleys on the upper ends of the spindle and countershaft; and stop means limiting the downward pivotal movement of the unitv 7. In a drill press of the kind including a column, a spindle, spindle head movable on the column, a bracket shaft projecting from the latter and a bracket mounted on the shaft, the improvement which comprises: a multiple speed drive unit adjacent the bracket on the side thereof remote from the column and including a vertically disposed countershaft housing, a countershaft therein, a motor on the side of the housing remote from the column, the motor having a down- I wardly projecting vertical shaft; belt-connected multiple step pulleys on the lower ends of the motor shaft and oountershaft and on the upper ends of the countershaft and spindle; a horizontally disposed pivot member about which the motor and housing are independently movable, the pivot member being supported on the upper part of the bracket athwart the bracket shaft and on the column side of the unit, whereby the weight of the unit acts in a direction to tension the belt connection between the pulley on the upper ends of the spindle and countershaft; and adjustable stop means limiting the downward movement of the motor relative to the housing.

WILLIAM L. FISMER.

References Cited in the file of this patent UNITED STATES PATENTS Number Name Date 2,176,572 I-Iedpeth Oct. 17, 1939 2,311,993 Olsen Feb. 23, 1943 2,473,963 McKelvey June 21, 1949 2,506,514 McKelvey May 2, 1950 2,564,160 Jones Aug. 14, 1951