US 2512970 A
Description (OCR text may contain errors)
June 27, 1950 c. T. ROGNE 2,512,970
FLUSH CIRCULAR SAW MOUNTING Filed Jan. 26, 1946 ATTGINIH Patented June 27, 1950 vN ITEP.-:
4 Claims I 2,512,916, A v I FLUSH CIRCULAR, sAw-Movmme Carl T. Rogne, Milwauked' wis lissignqi'lo f: Arthur RLfSegal; Milwaukee',' V Vis. i;
This invention relates to improvements in saw mountings It is. a'primary object of the invention to' provide means whereby a circular saw or the like may be so mounted that it may be used in substantial face contact with a surface adjacent to which a cut is to be made and yet may be attached to or removed from a conventional arbor shaft in substantially a conventional manner.
In the drawings:
Figure 1 is a view in cross section through a saw mounted in accordance with the present in- Vention.
Figure 2 is a view in face elevation of the saw and arbor shown in Fig. 1.
The arbor shaft 3 is conventional, having the usual shoulder at 4 beyond which extends the threaded end portion 5 of the shaft to receive the clamping disk 6 and nut 1 in the usual manner.
If the saw were also conventional, the disk 6 and nut I and the threaded extremity of the shaft would all project beyond the face 01 the saw disk 8. According to the present invention, however, a cup-shaped mounting member ID is applied to support the saw 8. Such member having a base at II apertured to receive the threaded portion 5 of the arbor and to abut the shoulder 4 thereof. The interior of cup-shaped member I is of suflicient diameter to receive freely the clamping annulus 6 and the nut l. The surface area of the annulus 6 is desirably made as large as possible to prevent rotary slippage, consequently in the preferred embodiment the annulus diameter approaches that of the interior of the cup shaped member Ill. Furthermore the cup base I l is made substantially planiform and at a right angle at its junction with tubular wall [0 so that the external periphery of the cup will be as small as possible consistent with the large interior of the cup. In this manner the saw may make a deep cut notwithstanding the mounting. The depth of the cup-shaped member I0 is such that the threaded end of the arbor shaft does not project.
The saw disk 8 has an opening at l5 into which is preferably received an annular flange l6 carried by the cup-shaped member In. A number of openings bored and tapped axially into the rim of the cup-shaped member [0 outside of the flange I6 thereof, receive the screws IT, for which the saw disk 8 is provided with countersunk holes registering with the tapped openings in the cupshaped mounting member.
It will of course be understood that the cupshaped mounting member comprises a relatively permanent part offlthe saw'blade, remainingfixed thereto-for the purpose of mounting and de mounting theblade. Assuming that a cross cut l d ies we do be u ed. in e th eab pn the same arbor, each would be equipped, preferably, with its own mounting member so that the work of replacement would involve merely the removal of the nut l and Washer 6, taking one saw and mounting member from the arbor, substituting another similar unit and replacing the washer 6 and nut 1.
All kinds of existing portable or flexible or fixed sawing devices may be equipped with saw units embodying the invention, with no change whatever in the arbor. Any device so equipped can be used to make a saw cut indirect immediate proximity to a surface which would obstruct the use of a saw mounted on the ordinary way upon its arbor, For example, a portable saw equipped with a blade in accordance with the present invention may be used to saw through a partition directly at the surface of a wall to which such partition is connected. If the blade were mounted in the ordinary way, the projecting end of the arbor would prevent the saw from being used closer than perhaps an inch and one-half from such wall.
1. As a new article of manufacture, a mounting member applicable to a large center aperture in a saw disk for the support thereof, said mounting member comprising a cup having an interior diameter less than the diameter of the aperture in such disk and havin a tubular wall provided at its end with an annular flange corresponding substantially in exterior diameter to the aperture of the saw disk, the depth of such cup-shaped member being sufficient to receive the threaded end of a saw mounting arbor and the interior diameter thereof being sufficient to receive a mountlug nut and washer, the said mounting member having a base wall portion substantially normal to the tubular wall at its junction therewith and provided with an opening substantially coaxial with the flange and of such a size to receive said threaded arbor end.
2. In an attachment for mounting a conventional saw disk having a central aperture and planiform faces beyond the end of a conventional arbor having a shoulder and an arbor nut, a cupshaped mounting member having an apertured bottom wall engageable on the arbor in abutment with the shoulder, and an integral tubular side wall projecting normally from the bottom wall coaxially with the aperture to an extent beyond the end of the arbor and having a terminal surcoaxially with the aperture to an extent beyond the end of the arbor and having a 'terniinal.;sur' face normal to its axis and provided with tapped holes for saw disk screws, theiinteriior of tliez saiii 1? side wall being sufficiently large to receive wholly the arbor nut, together with an annular flange projecting axially from the inner periphery of the terminal surface of "the tubular *wall, -a Islamform saw disk haiiing one face engaged -witl'rsaid surface and provided with a-central aperturein which theiiange-is engaged and *other'aper-tin'es 4 registering with said holes, and screws extending through the last mentioned apertures into said holes and fixing said disk to said member.
4. The device of claim 1 wherein the washer has a surface area substantially equal to the base wall area. CARL T. ROGNE.
., nEn RE o'Es orrnn The following references are of record in the :file of this patent:
, UNI;PED STATES PATENTS Number Name Date "2431176 ?Mc"Donough June 21, 1881 $841639 'Larish Oct. 18, 1892 hmfifizafi Sept. 15, 1914 2,111,986 Modin Mar. 22, 1938 FOREIGN EPATENTS Number I *sGoiintryy I rmate 85,581 Germany Feb;.-2fi,i189.6