Table mounting for portable power saw

• US 3,905,263 A
• Filed: 08/09/1974
• Issued: 09/16/1975
• Est. Priority Date: 08/09/1974
• Status: Expired due to Term

• Current Assignee: Roger W. Smith
• Original Assignee: Roger W. Smith
• Inventors: Smith, Roger W.
• Primary Examiner(s): Schran, Donald R.
• Application Number:
  US05/496,050
• Time in Patent Office: 403 Days
• Field of Search: 83/477.2,477.1,477 144/1R,1E,1F,35R,35A
• US Class Current: 83/477.2
• CPC Class Codes: B23D 47/025 of tables
• CPC Class Codes: B27B 5/243 the saw blade being arranged underneath the work-table the circular saw blade arranged underneath a stationary work-table for sawing material in general B23D45/06
• CPC Class Codes: Y10T 83/773 Work-support includes passageway for tool [e.g., slotted table]

Abstract

A hand-held circular saw is converted into a table saw by providing a quick-release mount and extended controls. The mount is on the underside of the top of a portable sawing table and secures the circular saw (in an inverted orientation) rigidly in place with its baseplate flush against the underside of the tabletop and with the saw blade projecting upwardly through a suitable clearance opening. The inner end of a control arm is releasably secured to the handle of the circular saw by a special clamping device, and the trigger switch on the handle is manually actuated by an operating mechanism on the arm having a control linkage that extends along the arm to the outer end portion thereof where it may be conveniently reached by the operator during use of the table saw apparatus.

Claims

1. Convertible saw apparatus comprising:

a power-operated, normally hand-held saw having a baseplate, a rotary blade adjustable with respect to said baseplate, a drive for the blade, a handle, and an actuator on the handle for rendering the blade drive operational;

portable table structure provided with a tabletop having a clearance openIng therein for receiving said blade;

a quick-release mount on the underside of said tabletop engageable with said baseplate for rigidly securing the baseplate to the tabletop with said blade extending upwardly through said opening, whereby the hand-held saw may be converted into a table saw;

a control arm having opposed, inner and outer ends;

releasable means connecting said inner end of the arm to said handle with the arm extending outwardly beneath said tabletop to locate the outer end portion thereof where it may be conveniently grasped by an operator for adjustment of the position of said blade; and

manually operable mechanism on said arm engageable with said actuator for operating the latter when the arm is connected to said handle and having a control linkage extending along said arm to said outer end portion thereof, whereby to permit the operator to selectively control the operation of the blade drive when the apparatus is employed as a table saw.

2. The apparatus as claimed in claim 1, wherein said baseplate has a pair of opposed edges, and wherein said mount includes means defining a slot for receiving one of said edges with said baseplate flush against said underside of the tabletop, a retainer engageable with the opposite edge of said baseplate upon insertion of said one edge into said slot, and a locking device movable to and from an operative position capturing said baseplate between said device and said underside of the tabletop.

3. The apparatus as claimed in claim 2, wherein said locking device comprises a member pivotally mounted on said underside of the tabletop for swinging movement about an upright axis toward and away from said operative position where said member extends beneath said baseplate.

4. The apparatus as claimed in claim 1, wherein said handle defines an opening for receiving the fingers of an operator when gripped by hand, and wherein said releasable means includes a clamping device extending through said opening and engaging said handle.

5. The apparatus as claimed in claim 4, wherein said releasable means further includes a component rigidly secured to said arm, received within said handle opening and configured to present a core therewithin.

6. The apparatus as claimed in claim 5, wherein said handle has opposed sides, said inner end of the control arm engaging one side of said handle, and wherein said clamping device has a clamping plate engaging the opposite side of said handle and means drawing said plate and said inner end toward each other to sandwich said handle therebetween.

7. The apparatus as claimed in claim 1, wherein said mechanism includes a pivotal cam adjacent said actuator for operating the latter, and a crank connected with said cam and operated by said linkage.

8. Convertible saw apparatus comprising:

a power-operated, normally hand-held saw having a baseplate provided with a pair of opposed edges, a rotary blade adjustable with respect to said baseplate, a drive for the blade, and a handle;

portable table structure provided with a tabletop having a clearance opening therein for receiving said blade;

a quick-release mount on the underside of said tabletop engageable with said baseplate for rigidly securing the baseplate to the tabletop with said blade extending upwardly through said opening, whereby the hand-held saw may be converted into a table saw, said mount including means defining a slot for receiving one of said edges of the baseplate with the latter flush against said underside of the tabletop, a retainer engageable with the opposite edge of said baseplate upon insertion of said one edge into said slot, and a locking device movable to and from an operative position capturing said baseplate between said device and said underside of the tabletop;

a control arm having opposed, inner and outer ends;

releasable means connecting said inner end of the arm to said handle with the arm extending outwardly beneath said tabletop to locate the outer end pOrtion thereof where it may be conveniently grasped by an operator for adjustment of the position of said blade; and

selectively operable means accessible to the operator and coupled with said drive for the blade for rendering the drive operational to thereby permit the operator to selectively control the blade when the apparatus is employed as a table saw.

9. The apparatus as claimed in claim 8, wherein said locking device comprises a member pivotally mounted on said underside of the tabletop for swinging movement about an upright axis toward and away from said operative position where said member extends beneath said baseplate.

10. The apparatus as claimed in claim 8, wherein said handle defines an opening for receiving the fingers of an operator when gripped by hand, and wherein said releasable means includes a clamping device extending through said opening and engaging said handle.