# US 7,607,999 B2 · Golf green reading device > Agents: this data is available as JSON from the patentgrep API and MCP server — see https://patentgrep.com/llms.txt - Number: US 7,607,999 B2 - Document ID: US7607999B2 - Status: Granted - Kind: B2 - Application number: 11/926,795 - Filed: 2007-10-29 - Published: 2008-03-06 - Granted: 2009-10-27 - Earliest claimed: 2005-11-02 - Inventors: Daniel Green - Web page: https://patentgrep.com/patent/US7607999B2 ## CPC - A63B 69/3676: {for putting (A63B69/3608, A63B69/3661, A63B69/3667 and A63B69/3697 take precedence)} - G01C 9/06: Electric or photoelectric indication or reading means - A63B 2225/74: with powered illuminating means, e.g. lights - A63B: APPARATUS FOR PHYSICAL TRAINING, GYMNASTICS, SWIMMING, CLIMBING, OR FENCING; BALL GAMES; TRAINING EQUIPMENT (apparatus for passive exercising, massage A61H) - G01C: MEASURING DISTANCES, LEVELS OR BEARINGS; SURVEYING; NAVIGATION; GYROSCOPIC INSTRUMENTS; PHOTOGRAMMETRY OR VIDEOGRAMMETRY (measuring liquid level G01F; radio navigation, determining distance or velocity by use of propagation effects, e.g. Doppler effects, propagation time, of radio waves, analogous arrangements using other waves G01S) ## Abstract A golf green reading device has a lens with a reference line that is illuminated when the reference line is in a horizontal or vertical orientation. The reference line is illuminated by an electrical circuit secured within a housing having a power source, a light source, and a level switch. The user holds the device in a horizontal or vertical orientation to read the slope of a golf green relative to the reference line and determine the correct line to putt the golf ball. ## Claims ### Claim 1 A green reading device comprising: a housing; a lens assembly secured to the housing said lens assembly comprising at least one lens having a front surface, a back surface and a peripheral side edge; said peripheral side edge defining a plane of said lens; said at least one lens being solid and comprising a light transmitting material between said front and back surfaces of said lens; the lens having a reference line which is capable of being illuminated; and an electrical circuit comprising; a power source; at least one light source, the at least one light source being electrically connected to the power source; said at least one light source being positioned to direct light through the lens material between the front and back surfaces of the lens in a direction generally parallel to said plane of said lens; the light from the light source illuminating the reference line when the light source is activated; and at least one level switch, the at least one level switch being electrically connected to the power source and the at least one light source so that the level switch activates the at least one light source when the reference line is in either a horizontal or vertical orientation. ### Claim 2 (depends on 1) The green reading device of claim 1 wherein the lens comprises two segments having edges that mate to form the reference line. ### Claim 3 (depends on 1) The green reading device of claim 1 wherein the lens is a one-piece lens; said reference line being defined by a score on the lens. ### Claim 4 (depends on 1) The green reading device of claim 1 wherein the reference line is defined by at least a portion of said peripheral edge of said lens; said edge comprising a sloped or curved surface. ### Claim 5 (depends on 4) The green reading device of claim 4 wherein said edge comprises a pair of opposed inwardly sloping surfaces defining a channel extending along at least a portion of said edge. ### Claim 6 (depends on 5) The green reading deice of claim 5 wherein said channel is defined by generally straight walls. ### Claim 7 (depends on 5) The green reading device of claim 5 wherein said channel is defined by parabolic walls. ### Claim 8 (depends on 4) The green reading device of claim 4 including a target on at least one of said front and back surfaces of said lens; said target being positioned relative to said reference line such that light from said light source reflected from said reference line is directed to said target. ### Claim 9 (depends on 5) The green reading device of claim 5 wherein a reflective material is adjacent the walls of said channel to reflect light from said light source toward at least one face of said lens. ### Claim 10 (depends on 5) The green reading device of claim 5 wherein said channel is filled with a material; said material being reflective or having a reflective surface. ### Claim 11 (depends on 5) The green reading device of claim 5 wherein said channel includes end walls; said end walls defining a cant. ### Claim 12 (depends on 1) The green reading device of claim 1 including a fiber optic element extending at least part way across said lens, said fiber optic element being illuminated by said light emitting device when said light emitting device is activated; said fiber optic element defining said reference line. ### Claim 13 A green reading device comprising: a housing; a lens assembly secured to the housing; said lens assembly comprising at least one lens having a front surface, a back surface and a peripheral side edge, said peripheral side edge defining a plane of said lens; said lens being solid and comprising a light transmitting material between said front and back surfaces of said lens; the lens having a reference line; an electrical circuit contained within the housing, the electric circuit comprising a power source, at least one light source, and at least one level switch; whereby, the level switch closes the circuit to activate the at least one light source when the reference line is in either a horizontal or vertical orientation; said at least one light source being positioned to direct light through the lens material in a direction generally parallel to said plane of said lens between the front and back surfaces of the lens; the light from the light source illuminating the reference line when the light source is activated; the reference line having a shape such that light from said light source will be reflected toward at least one of said front and back surfaces. ### Claim 14 (depends on 13) The green reading device of claim 13, further comprising a power switch. ### Claim 15 (depends on 13) The green reading device of claim 13 wherein the at least one lens comprises a generally straight edge, said edge defining said reference line. ### Claim 16 (depends on 15) The green reading device of claim 15 wherein said straight edge comprises at least a portion of said peripheral edge of said lens assembly. ### Claim 17 (depends on 15) The green reading device of claim 15 wherein said lens assembly comprises a second lens; said second lens having a generally straight edge; the straight edges of said two lenses abutting each other. ### Claim 18 A green reading device comprising: a housing; a lens comprising a lens assembly having at least one lens comprising a front surface, a back surface and a peripheral side edge, said peripheral side edge defining a plane of said lens; said at least one lens being solid and comprising a light transmitting material between said front and back surfaces of said lens; at least a portion of said peripheral edge defining a sloped or curved surface; said sloped or curved surface defining a reference line; an electrical circuit contained within the housing, the electric circuit comprising a power source, at least one light source electrically connected to the power source, and at least one level switch, the at least one level switch being electrically connected to the power source and the at least one light source so that the level switch activates the at least one light source when the reference line is in either a horizontal or vertical orientation; the at least one light source being positioned such that light from said at least one light source will travel through the lens material in a direction generally parallel to said plane of said lens between said front and back surfaces of said lens to impinge upon said reference line; whereby; said reference line is illuminated when light from said at least one light source impinges upon, said reference line. ### Claim 19 (depends on 18) The green reading device of claim 18 wherein said lens further includes a cant formed at at least one end of said edge, said cant being shaped and positioned to be illuminated when said reference line is illuminated and to be visible to a user sighting along the edge of the lens. ### Claim 20 (depends on 18) The green reading device of claim 18 wherein said sloped or curved surface is shaped to reflect light from said light source toward at least one of said front and back surfaces of said lens such that said reference line is visible to a view looking through the lens in a direction generally normal to the front and back surfaces of the lens. ### Claim 21 (depends on 20) The green reading device of claim 20 wherein said at least a portion of said edge comprises a pair of inwardly sloped or curved surfaces which, in combination, define a channel. ### Claim 22 (depends on 20) The green reading device of claim 20 wherein said channel is filled with a material; said material being reflective or having a reflective surface. ### Claim 23 (depends on 20) The green reading device of claim 20 wherein a reflective material is adjacent the walls of said channel to reflect light from said light source toward at least one face of said lens. ### Claim 24 A green reading device comprising: a housing; a lens assembly secured to the housing said lens assembly comprising at least one lens having a front surface, a back surface and a peripheral side edge; said peripheral side edge defining a plane of said lens; said at least one lens being solid and comprising a light transmitting material between said front and back surfaces of said lens; the lens having a reference line and a target on at least one of the front and back surfaces of the lens; the reference line being adapted to direct light toward said at least one target; and an electrical circuit comprising; a power source; at least one light source, the at least one light source being electrically connected to the power source; said at least one light source being positioned to direct light through the lens material between the front and back surfaces of the lens in a direction generally parallel to said plane of said lens; the light from the light source illuminating the reference line and the reference line directing light to the target when the light source is activated; and at least one level switch, the at least one level switch being electrically connected to the power source and the at least one light source so that the level switch activates the at least one light source when the reference line is in either a horizontal or vertical orientation. ### Claim 25 (depends on 24) A green reading device of claim 24 wherein said reference line is comprises at least a portion of the peripheral edge of said lens; said portion of the peripheral edge defining a sloped or curved surface. ### Claim 26 (depends on 25) The green reading device of claim 25 wherein said edge defines a channel; said channel being filled with a material that is reflective or has a reflective surface.