Patent GB-885509-A (GB)
Title: Improvements in or relating to grinding or like machines
IPC: B23Q1/70
Filed: 1958-01-22
Abstract: 885,509. Grinding. SUCKLING, E., [trading as BRITAN MANUFACTURING CO.]. Jan. 22, 1959 [Jan. 22, 1958], No. 2177/58. Class 60. A grinding or like machine has a driven shaft which is progressively stepped in diameter to provide a set of spaced mountings on the shaft for a number of grinding or like wheels. A grinding machine has a base A supported on three feet A<SP>1</SP>. A pivot pin C secured to a projection A<SP>3</SP> on its base enters a hole in the supporting plate B<SP>1</SP> of an electric motor B. The plate B<SP>1</SP> rests on four projections A<SP>2</SP> to which it is bolted, the holes in the plate B<SP>1</SP> being arcuate or providing sufficient clearance for the bolts to permit slight pivotal movement of the motor B about the pin C when setting-up. The driven shaft D has a portion E with a bore E<SP>1</SP> to receive the end of the motor shaft to which it is clamped by grub screws E<SP>2</SP>, E<SP>2</SP>. A portion F carries a first clamping disc G<SP>1</SP> and a grinding wheel G, and a screw-threaded portion F<SP>1</SP> carries the second clamping disc G<SP>2</SP>; the disc G<SP>1</SP> has a boss G<SP>3</SP> engaging at its end the shoulder between the portions E, F. A spacer portion H is followed by a portion H<SP>1</SP> carrying a first clamping disc J<SP>1</SP> and a grinding wheel J, and by a screw-threaded portion H<SP>2</SP> carrying the second clamping disc J<SP>2</SP>; the first clamping disc J<SP>1</SP> has bosses J<SP>3</SP>, J<SP>4</SP>, the latter having an external diameter equal to that of the hole in the grinding wheel. A spacer portion K is followed by a mounting portion K<SP>1</SP> for a grinding wheel L with associated screw-threaded portion K<SP>2</SP>. A spacer portion M is followed by a portion M<SP>1</SP> carrying a sleeve N, a first clamping disc O<SP>1</SP> and a grinding wheel O, and by a screw-threaded portion M<SP>2</SP> carrying the second clamping disc O<SP>2</SP>. The sleeve N is held between the boss 0<SP>3</SP> of first clamping disc O<SP>1</SP> and the shoulder between portions M, M<SP>1</SP>. The sleeve N is mounted by a ball-bearing in. a casing P supported on a projection A<SP>4</SP>, a pin Q secured in the projection engaging a hole in the casing P; the latter is bolted to the projection A<SP>4</SP>, the holes in the casing receiving the bolts with sufficient clearance to permit slight pivotal movement during setting-up. The base A has a relatively deep recess A<SP>9</SP> filled with water to enable the tool or other article being ground to be cooled during grinding. A splash guard S is bolted to projections A<SP>6</SP>, A<SP>6</SP>. Adjacent to each wheel is a rest T carried on a pillar T<SP>1</SP> with a supporting plate T<SP>2</SP> adjustably bolted to a projection A<SP>7</SP>. A single bolt may be used, the plate T<SP>2</SP> being guided by a dowel pin secured to the projection A<SP>7</SP> and engaging the slot in its plate T<SP>2</SP> through which the bolt passes. When the apparatus is an ancillary to a lathe for sharpening the lathe tools, one wheel may be a relatively coarse grinding wheel for roughing tools, another may be a relatively fine grinding wheel of substantial width for general tool grinding, a third may be fine but narrow for grinding shaped tools, whilst the fourth may be a honing wheel for imparting a final finish to the tool cutting edges.