US770150A - Lead-gage and arbor-level. - Google Patents

Description

No. 770,150. PATENTED SEPT. 13, 1904.

M. 0. BARRY.

LEAD GAGE AND ARBOR LEVEL.

APPLICATION FILED MAR.1. 1904.

N0 MODEL. 2 SHEETSSHEET .1.

WITNESSES: INVENTOf? Jfacfi Ci ar] y By W 2 A TTOHNE VS No. 770,150 I PATENTED SEPT. 13, 1904. I

M. G. BARRY. LEAD GAGE AND ARBOR LEVEL.

APPLICATION FILED MAR. 1. 1904. NO MODEL. 2 BHEET SSHEET 2- 5 1% 1m lll mu" WMWHHM WITNESSES: INVENTOR r E %c]; CiBarr ATTORNEYS saw-arbor and carriage with a preferred UNITED STATES Patented September 13,1904.

7 ATENT OFFICE.

MACK O. BARRY, OF ATLANTA, GEORGIA, ASSIGNOR OF ONE-HALF TO CALHOUN T. LADSON, OF ATLANTA, GEORGIA.

LEAD-GAGE AND ARBOR-LEVEL.

SPECIFICATION forming part of Letters Patent No. 77 0,150, dated September 13, 1904.

Application filed March 1, 1904- To all whom it may concern.-

Be it known that LMAOK C. BARRY, a citizen of the United States, and a resident of Atlanta, in the county of Fulton and State of Georgia, have invented a new and Improved Lead-Gage and Arbor-Level, of which the following is a full, clear, and exact description.

My invention relates to a lead-gage and arbor-level for setting the carriage and arbor of a circular-saw mill so that the saw will out directly parallel to the carriage. The present methods of gaging the carriage and the arbor so as to make the saw cut properly involve the crude and clumsy use of a long string or cord. This method is wholly unsatisfactory and is very inconvenient and very inaccurate. It is almost impossible to accurately gage the carriage and saw by the cord method, and it is the object of my invention to do away with this crude method'and to provide a neat and accurate device for this purpose. By the use of my invention the carriage and saw can be gaged within a few minutes by an unskilled person in lining up a mill and getting the desired leadas, for instance, one thirty-second of an inch in five feet.

A further object of my invention is to provide for the accurate leveling of the arbor.

Reference is to be had to the accompanying drawings, forming a part of this specification, in which similar characters of reference indicate corresponding parts in all the figures.

Figure 1 is a perspective view showing the form of my invention applied to the arbor and in position for use. Fig. 2 is a perspective view of the arbor, showing the position of the instrument when used with the level. Fig. 3 is an end view of the arbor with the instrument in position. Fig. 4 is a sectional view on the line 4 4 of Fig. 3, showing the gage-bar in plan View; and Fig. 5 is a side view of the parts shown in Fig. 3.

My improved implement may be applied to an arbor or shaft placed in the bearings for the sawarbor, but I prefer to employ the saw-arbor itself to support the instrument.

In the drawings, (t represents a table or Serial No. 196,059. (No model.)

platform upon which the saw and carriage are located. I

l is the arbor of the saw, which is operatedriage 8 9 and running upon the tracks 10 upon the table a. The two collars 5 and 6 are adapted to hold the instrument which forms the main part of my invention when the saw is removed.

This instrument consists of a yoke 11, constituting a supporting member bifurcated at the lower end in order to pass over the arbor when located between the collars 5 and 6. Upon this yoke a thumb-nut 12 is provided to secure thebolt 13 in position against the yoke. Through the bolt 13 is a passage 14, adapted to permit the passage of the gage-bar 15, as shown. A disk 16 is also provided on the front of the yoke, which has a slot 17, adapted to receive and hold one edge of the gage-bar. The bolt 13 has a collar 18, which is adapted to fit in an opening 19 in the disk 16. This collar bears against the edge of the gage-bar 15 and assists in holding it in an obvious manner.

The gage-bar is provided with a needle or pointer 20, which is adjustably held to the gage-bar by means of a screw 21.

22 is a leveling device of any desired form, mounted on a bracket 23, which is adapted to be placed against the gage-bar 15, in the manner shown in Fig. 2, for a purpose to be described.

In using this instrument the saw is removed from the arbor by taking-01f the loose collar 6, and the yoke 11 is then placed in the stead of the saw and the collar 6 tightened. The gage-bar 15, which also constitutes a lining and leveling bar, is then placed as shown in full lines in Fig. 1 and the carriage brought up to such position that the front head-block 7 will be even with the needle in the gagebar, which may be adjusted to the necessary position. After the needle is adjusted to come into contact with the face of the headblock 7 the thumb-screw 21 is tightened to hold the needle in that position. The gagebar is then swung around to the opposite position, (shown in dotted lines in Fig. 1.) the construction being such that no axial motion of the instrument is possible, but merely a motion of rotation about the bolt 13. The carriage is then moved along the Ways 10, so that the front head-block 7 will be even with the needle. If there is any space between the end of the needle and the head-block, this can be observed, and the support 3 can then be adjusted in the proper manner to overcome this difference. For example, let it be supposed that the needle were, in its second position, one-eighth of an inch from the headblock. The needle can be loosened and moved half-way up to the blockthat is, one-sixteenth of an inch. Then the arbor can be adjusted to bring the needle exactly to the face of the head-block and the carriage will be in 2 5 perfect line with the arbor, as shown at 32. The needle is to be sealed in thirty-second parts of inches. In order to get the proper lead, the gage-bar should be placed as shown in full lines in Fig. 3 1 and the needle broughtback to proper distance-as, for example, one thirty-second of an inch in live feet. Then the carriage may be moved up so the front block will be even with the needle and the arbor adjusted until the 3 5 needle touches the block, and the gage will be perfect minus one thirty-second of an inch in five feet. For leveling the arbor the bar 15 may be brought to the vertical position shown in Fig. 2 and any desired leveling device can 4 then be used in an obvious manner. The needle can also be brought up to the head-block and the amount that it projects beyond the face of it can be read on the scale 32. This Will save the adjustment that would otherwise be necessary. It will be readily seen that this device causes these operations to be very readily performed and insures absolute accuracy besides reducing the loss of time usually necessary in the old methods employed.

1 do not wish to be limited to the exact con- 5 struction shown in the drawings, as they merely illustrate the principle of my invention, and various changes may be made therein without departing from its scope as set forth in the claims.

Having thus described my invention, I claim as new and desire to secure by Letters Patent 1. In a lead-gage and arbor-level for circular saws, the combination of a gage-bar, a pointing device thereon, means for securing said pointing device to said gage-bar in adjusted position with respect thereto, and means for mounting said bar upon a sawarbor; said means having a pivotal support for said bar, arranged in parallel relation to the 5 arbor.

2. The combination of a carriage having a head-block, an angularly-adjustable arbor, means for securing a saw to the arbor, a supporting member adapted to be held by said 7 securing means, a gage-bar, a pointing device, and means for mounting said gage-bar upon the support and holding the gage-bar in a position perpendicular to the axis of the sawarbor. 7 5

3. The combination of a gage-bar, a scaled pointing device thereon, means for securing said pointing device in adjusted positions perpendicular to said bar, and means for mounting said bar upon a horizontal saw-arborysaid means having a pivotal support for said bar arranged in parallel relation to the arbor.

4. The combination of a carriage having a head-block, an arbor, means for securing a saw to the arbor, a supporting member adapted 5 to beheld by said securing means, a gage-bar,

a scaled pointing device, and a bolt passing through said support and pivotally supporting said gage-bar, said bolt being parallel to said arbor, said pointer being held in proximity 9 to the head-block.

In witness whereof I have signed my name to this specification in the presence of two subscribing witnesses.

MACK C. BARRY. Witnesses:

W. O. PUOKETT, L. E. JOHNS.

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