US 5,495,758 A · Tachometer assembly with integral internal wrench

Abstract

In a tachometer assembly for attachment to an output shaft of a rotary machine, wherein the tachometer assembly includes a tachometer housing enclosing a sensor drum fixed to a tachometer shaft, the shaft extending from the tachometer housing and adapted for attachment to the output shaft of the rotary machine for rotation therewith, and a sensor pad located peripherally adjacent the sensor drum, an improvement which includes an internal wrench mechanism for locking the tachometer shaft to the tachometer housing for common rotation therewith so as to facilitate threaded engagement between the tachometer shaft and the output shaft, as well as for unlocking the tachometer shaft from the tachometer housing for rotation relative to the tachometer housing to thereby permit the tachometer shaft to rotate with the output shaft after the tachometer housing is secured to the rotary machine housing.

Claims16

Dependent claims

In a tachometer assembly for attachment to an output shaft of a rotary machine having a machine housing, wherein the tachometer assembly includes a tachometer housing enclosing a sensor fixed to a tachometer shaft, the tachometer shaft extending from said tachometer housing and adapted for attachment to the output shaft of the rotary machine for rotation therewith, and a sensor pad located peripherally adjacent said sensor;

the improvement comprising:
internal wrench means including cooperative means mounted on said tachometer shaft and on said tachometer housing, respectively, for locking said tachometer shaft to said tachometer housing and thereby preventing relative rotation therebetween so as to facilitate engagement between said tachometer shaft and said output shaft, and for unlocking said tachometer shaft from said tachometer housing to thereby permit relative rotation therebetween and to permit said tachometer shaft to rotate with said output shaft after said tachometer housing is secured to the rotary machine.

A tachometer assembly including a tachometer shaft projecting in an axial direction from a tachometer housing and adapted for attachment to an output shaft of a rotary machine, said assembly including means for permitting:

(1) sequential axial and rotational movements of said tachometer shaft in respective first axial and rotational directions relative to said tachometer housing to a first installation position where said tachometer shaft and said tachometer housing are axially and rotationally fixed, and wherein said tachometer shaft axially projects beyond said tachometer housing to a degree greater than when said tachometer shaft is in an operative position;
and (2) sequential rotational and axial movements of said tachometer housing relative to said tachometer shaft in respective second axial and rotational directions opposite to said first axial and rotational directions to said operative position wherein said tachometer shaft is freely rotatable and wherein said tachometer shaft axially projects beyond said tachometer housing to a degree less than when said tachometer shaft is in said installation position.

Dependencies are inferred from the claim text.

Tachometer assembly with integral internal wrench

Life of this patent

Tachometer assembly with integral internal wrench

Life of this patent

Abstract

Claims16