Cutting – Rotatable disc tool pair or tool and carrier – With means to support work relative to tool
Patent
1986-04-08
1987-09-22
Yost, Frank T.
Cutting
Rotatable disc tool pair or tool and carrier
With means to support work relative to tool
30388, 83490, 83581, B27B 524
Patent
active
046947213
ABSTRACT:
Method and apparatus for providing motive power to a tool are disclosed. A preferred power mitre box (10) including a base (12), a table (14) and electrically-powered motor unit (18) suitable for driving a saw blade (20) is described. The motor unit (18) includes an armature (40) and an arbor shaft (22) which are respectively supported by armature bearings 42 and arbor bearings 44 and are preferably substantially parallel and of substantially the same length. Also, the distances between the armature bearings (42) and the arbor bearings (44) are preferably substantially equal. The relatively large distance between the arbor bearings (44) causes the blade (20) to have very little play or deflection due to looseness in the bearings (44). In preferred embodiments, a speed reducer assembly (34) is located on the opposite end of the arbor shaft (22) in relation to the blade (20). Also, the speed reducer assembly is preferably of the cog belt type.
REFERENCES:
patent: 1778971 (1930-10-01), Dekoning
patent: 2208582 (1940-07-01), Hollister
patent: 2252112 (1941-08-01), Bailey
patent: 2323248 (1943-06-01), Sellmeyer
patent: 3538967 (1970-11-01), Hensley
patent: 4002094 (1977-01-01), Erickson et al.
Delta 33-150 Sawbuck Frame & Trim Saw, (Parts List Revised 1-15-86).
Rockwell International (Delta) 34-010 Motorized Miter Box, (Parts List Revised 6/15/77; Parts List Revised 3/1/78; Instruction Manual).
Delta International Machinery Corp.
Yost Frank T.
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