US429525A - Ratchet-brace - Google Patents

Description

(No Model.)

J. HERM.l RATGH'ET BRAGE.

No. 429,525. y Patented Jun@ 3, 1890.

:5, li?. i.

Attorneys me mams versus col, moro-mno., wAsmNcn'cu, u. c,

UNITED STATES PATENT OFFICE.

JOSEPH HERM, OF BIRMINGHAM, ALABAMA.

RATCH ET-BRAC E.

SPECIFICATION forming part of Letters Patent No. 429,525, dated June 3, 1890.

Application filed November 14, 1888. Serial No. 290,776. (No model.)

To all whom it may concern.-

Be it known that I, JOSEPH HEEM, a citizen of the United States, residing at Birmingham, 1n the county of Jefferson and State of Alabama, have invented certain new and useful Improvements in Ratchet-Braces; and I do declare the following to be a full, clear, and exact description of the invention, such as will enable others skilled in the art to which 1t appertains to make and use thesame. reference being had to the accompanying drawings, and to the letters of reference marked hereon, which form a part of this specificaion.

My invention relates to an improvement in' ratchet-braces; and it consists in the peculiar construction and combination of devices that will be more fully set forth hereinafter, and particularly pointed out in the claims Ahereto appended. A

In the drawings which form part of this specificatiomFigure 1 is a side elevation of a drill-brace and countersink -bit embodying my improvements. Fig. 2 is adetail elevation of the ratchet-section. Fig. 3 is a similar view of the bit-head. Fig. 4 is a similar view of a handle adapted to be used in lieu of the sweep-brace in contracted places. Fig. 5 is aV detached horizontal section taken on the dotted line X X of Fig. l. Fig. 6 is a detached plan view of the countersink.

A represents the sweep-brace, which is of the usual form and has the usual swiveled bearing-knob B at its outer end and the usual swiveled sleeve C on its crank or sweep. .The inner arm D of the brace is squared in crosssection, as at E, for a suitable distance from its end.

F represents an arm of the head I, which is provided with a longitudinal square opening of suitable length, into which is placed the square end of the arm D, as shown in Fig. 5. The head I is provided with a horizontal opening or slot, in which the ratchet-wheel K is placed, and in which the pawls H, which engage the said ratchet-wheel, are pivoted. Placed in openin gs made in the inner ends of these pawls is a spiral spring a, for causing the said pawls to engage the ratchet-Wheel K. Passed loosely around the arm F of the head I is a collar or sleeve L, which is provided with a projection or enlarged portion b, which is revolved upon the said arm, and the proj ection or enlargement thus made to engage either of the pawls H desired, whereby it is held out of contact with the ratchet-wheel K. A circular bore is made transverselythrough the head I and ratchet-Wheel K, and through this bore is passed the spindle IWI, which is held therein by means of a screw which passes through the ratchet-wheel into the spindle, and which serves to secure the same firmly to the head.

A beveled gear-wheel O is slipped on the spindle, and has at one side a stud P, which engages a notch R in the arm, and thereby the said gear-wheel is locked to the brace and caused to rotate therewith.

. S represents the presser stem or arm, which has at its outer end a swiveled knob T, and is provided at its inner end with a central bore. A transverse opening is made through the said section, and the same is slipped on the spindle M and caused to bear against the outer side of the gear-wheel O, and is held in place by a nut U, which is screwed on the extreme end of the spindle.

X represents a spindle, which has the reduced portion W, which passes into a longitudinal bore made in the inner end of the presser-stem S; also made in the inner end of the stem and communicating with the said longitudinal bore is a transverse recess cl, in which is placed a wheel or disk e, through which the inner end of the reduced portion IV of the spindle X passes, and which is secured thereto by means of a screw Z. By this construction the Wheel e secures the spindle X securely in place, and at the same time allows it to freely revolve. Secured upon the spindle X at its inner end is a beveled gear which engages with the beveled gear O, and through the medium pf these two gears a revolving movement is imparted to the spindle. The spindleis provided with a longitudinal bore at its outer end for the reception of the tool R', and with longitudinal slits, which allow it to open and close upon the inner end of said tool. Screw-threads f are formed upon the said spindle near its center. Passing over the said Spindle is the clamping-sleeve V, which is provided with IOO screw-threads corresponding` to those upon the spindle, and by turning the sleeve its outer end is made to close the outer end of the spindle, and thusclamp the tool in the usual manner.

A represents a bracket that has an open ing B' of sufficient size to admit the spindle X, and an opening C' of reduced diameter. A screw D' Works in the said bracket and engages the spindle, and therebyclamps the bracket rmly thereto.

A sleeve E' has one end iitted in the opening C', and isprovided near the opposite end with a set-screw F.

G' represents a rod, which passes through the sleeve E', and has at its outer end a right-angled gage-arm H. A bracket I' is clamped to the rod by a screw K', and extending from the bracket is a bearing-sleeve L', which is parallel with the gage-rod. The outer end of the said sleeve is conical in shape7 and one portion thereof is cut away, as shown in Fig. G.

N' represents a triangular cutter, which is secured to the sleeve by a screw O', is arranged over the recess M', and has a triangular extended cutting'point P'.

R represents the bit, which is socketed in thespindle, passes through the sleeve L', and projects beyond the point thereof a suitable distance, this being regulated by ad justing the bracket I in or out on the gage-rod. The latter may be adjusted according to the desired depth of the hole to be drilled by loosening the screws F' and K' and moving said gage-rod in the bracket I' and sleeve E'.

A collar S' is fitted in a transverse central opening in the sleeve L', encompasses the drill-bit, and has a threaded stud that projects through an opening in one side of the sleeve. A clam ping-nut T is screwed to said stud and serves to clamp the bit in the sleeve. Then the device is thus arranged, as shown in Fig. l, the operator presses with his body against the knob T and applies thel point of the 4bit to the material to be drilled. He grasps the knob B with one hand and grasps the sleeve C with the other hand and rotates the brace and the beveled wheel O. The latter, through the pinion Y, imparts accelerated rotary motion to the bithead, the bit, and the sleeve L', and causes the gage-rod to Whirl around With the same. The bit serves to drill the opening, the cutter N' forms the countersink, and the gage de termines the depth of the opening, as will be readily understood.

lVhen itis desirable to dispense with the beveled gears, the spindle W may be inserted directly in the transverse opening in the head I, and secured by the screw Which passes through the ratchet-Wheel K, thereby adapting the brace to be usedin the usual manner.

The handle shown in Fig. 4 may be used instead of the brace by inserting its rightangled arm U' in the collar F.

Having thus described lnyinvention, what I claim, and desire to secure by Letters Patent of the United States, is

l. The combination of the presser-stem having a longitudinal opening in its front end andan opening in rear thereof which passes transversely through the stem, a toolspindle having its inner end loosely secured in the said longitudinal opening, a spindle passing through the said transverse opening, a bevel-gear placed on one end thereof, an operating-arm secured to the said spindle outside of the said gear, a nut upon the opposite end of the spindle, and a bevel-gear secured to the tool-spindle, which engages the gear upon the transverse spindle, substantially as shown.

2. The combination of the presser-stem having a longitudinal opening in its front end, a transverse opening in rear thereof, the tool-spindle loosely secured in said lon gitudinal opening, a spindle passing through said transverse opening, a bevel gear placed loosely on said spindle having a projection, an operating-head secured to said spindle having a cavity engaged by said projection, and a gear upon the clamping-spindle engaging the gear upon the transverse spindle, substantially as specified.

In testimony whereof I affix my signature in presence of t\vo Witnesses.

JOSEPH IlERM.

lVitnesses:

ROBERT TURTON, HARRY W. MYERs.

Images