Accelerometer

Claim 2

An accelerometer, for the direct measurement of the velocity of the head of a golf club, comprising a chassis, means to connect the chassis to a golf club shaft; a single body of known mass mounted on the chassis by spring means for movement relative to and parallel to the golf club shaft against the action of the spring means; mechanical measuring and indicating means mounted on the chassis and adapted to measure and indicate the extent of any movement of the single body, over a predetermined minimum movement, relative to and parallel to the golf club shaft toward the golf club head, the spring means comprising two parallel, flat, spring strips each having one end connected to an individual end of the single body and the other end connected to the chassis, the measuring and indicating means comprising a scale mounted on thE chassis; a pointer mounted on the chassis for rotary movement relative thereto with the free end of the pointer co-operating with the scale markings; and an arm mounted for movement with the body to cause rotation of the pointer relative to the chassis, the pointer being carried by a pinion gear which is meshed with a gear sector mounted on the chassis for engagement by the arm, whereby on movement of the arm the gear sector is rotated, which in turn rotates the pinion gear and thus the pointer, the measuring and indicating means including retaining means arranged to retain the measuring and indicating means in a position in which it is set by movement of the body relative to the chassis, and the retaining means comprising spring members bearing against pulleys disposed on sleeves embracing pillars, said pulleys mounted for rotation with the pinion gear and the gear sector, and for preventing the sleeves from riding up on the pillars.

Claim 3

An accelerometer, for the direct measurement of the velocity of the head of a golf club, comprising a chassis, means to connect the chassis to a golf club shaft; a single body of known mass mounted on the chassis by spring means for movement relative to and parallel to the golf club shaft against the action of the spring means; mechanical measuring and indicating means mounted on the chassis and adapted to measure and indicate the extent of any movement of the single body, over a predetermined minimum movement, relative to and parallel to the golf club shaft toward the golf club head, the spring means comprising two parallel, flat, spring strips each having one end connected to an individual end of the single body and the other end connected to the chassis, the measuring and indicating means comprising a scale mounted on the chassis; a pointer mounted on the chassis for rotary movement relative thereto with the free end of the pointer co-operating with the scale markings; and an arm mounted for movement with the body to cause rotation of the pointer relative to the chassis, the pointer being carried by a pinion gear which is meshed with a gear sector mounted on the chassis for engagement by the arm, whereby on movement of the arm the gear sector is rotated, which in turn rotates the pinion gear and thus the pointer, the measuring and indicating means including retaining means arranged to retain the measuring and indicating means in a position in which it is set by movement of the body relative to the chassis, including resetting means whereby the measuring and indicating means can be reset to a rest position after use of the accelerometer, and the resetting means comprising a button mounted for movement, relative to the chassis and in engagement with a spring arrangement arranged to engage the gear sector when out of its rest position, on movement of the button.

Claim 4

An accelerometer, for the direct measurement of the velocity of the head of a golf club, comprising a chassis, means to connect the chassis to a golf club shaft; a single body of known mass mounted on the chassis by spring means for movement relative to and parallel to the golf club shaft against the action of the spring means; mechanical measuring and indicating means mounted on the chassis and adapted to measure and indicate the extent of any movement of the single body, over a predetermined minimum movement, relative to and parallel to the golf club shaft toward the golf club head, the spring means comprising two parallel, flat, spring strips each having one end connected to an individual end of the single body and the other end connected to the chassis, the measuring and indicating means comprising a scale mounted on the chassis; a pointer mounted on the chassis for rotary movement relative thereto with the free end of the pointer co-operating with the scale markings; and an arm mounted for movement with the body to cause rotation of the pointer relative to the chassis, the pointer being carried by a pinion gear which is meshed with a gear sector mounted on the chassis for engagement by the arm, whereby on movement of the arm the gear sector is rotated, which in turn rotates the pinion gear and thus the pointer, the measuring and indicating means including retaining means arranged to retain the measuring and indicating means in a position in which it is set by movement of the body relative to the chassis, including resetting means whereby the measuring and indicating means can be reset to a rest position after use of the accelerometer, and the resetting means comprising a button mounted for movement, relative to the chassis and in engagement with a spring arrangement arranged to engage the gear sector when out of its rest position, on movement of the button.

Claim 5

An accelerometer as claimed in claim 2, in which the chassis and the parts mounted thereon are mounted within a housing comprising a base and a detachable cover.

Claim 6

An accelerometer, for the direct measurement of the velocity of the head of a golf club, comprising a chassis, means to connect the chassis to a golf club shaft; a single body of known mass mounted on the chassis by spring means for movement relative to and parallel to the golf club shaft against the action of the spring means; mechanical measuring and indicating means mounted on the chassis and adapted to measure and indicate the extent of any movement of the single body, over a predetermined minimum movement, relative to and parallel to the golf club shaft toward the golf club head, wherein the spring means comprises two parallel, flat, spring strips each having one end connected to an individual end of the single body and the other end connected to the chassis, the measuring and indicating means comprising a scale mounted on the chassis; a pointer mounted on the chassis for rotary movement relative thereto with the free end of the pointer co-operating with the scale markings; and an arm mounted for movemeNt with the body to cause rotation of the pointer relative to the chassis, the pointer being carried by a sleeve which is frictionally engaged with a string member extended between tops of arms of a Y shaped member mounted on the chassis for engagement by the arm, whereby on movement of the arm the Y shaped member is rotated, which in turn rotates the sleeve and thus the pointer.

Claim 7

An accelerometer, for the direct measurement of the velocity of the head of a golf club, comprising a chassis, means to connect the chassis to a golf club shaft; a single body of known mass mounted on the chassis by spring means for movement relative to and parallel to the golf club shaft against the action of the spring means; mechanical measuring and indicating means mounted on the chassis and adapted to measure and indicate the extent of any movement of the single body, over a predetermined minimum movement, relative to and parallel to the golf club shaft toward the golf club head, wherein the spring means comprises two parallel, flat, spring strips each having one end connected to an individual end of the single body and the other end connected to the chassis, the measuring and indicating means comprising a scale mounted on the chassis; a pointer mounted on the chassis for rotary movement relative thereto with the free end of the pointer co-operating with the scale markings; and an arm mounted for movemeNt with the body to cause rotation of the pointer relative to the chassis, the pointer being carried by a sleeve which is frictionally engaged with a string member extended between tops of arms of a Y shaped member mounted on the chassis for engagement by the arm, whereby on movement of the arm the Y shaped member is rotated, which in turn rotates the sleeve and thus the pointer.