ALBERT R PRATT
Engineering in Cherry Brook, MA

4201096, May 6, 1980

Dec 19, 1977

5/861915

Raymond C. Morrison - Scituate MA
Albert R. Pratt - Weston MA

Raytheon Company - Lexington MA

G05G 516, G05G 110, F16D 1314

74531

A knob assembly comprising a cup-shaped knob shell having therein a coaxial pair of oppositely wound coil springs disposed for binding engagement with a surrounding wall of a race and having respective terminal end portions engaging an encircled portion of an axially rotatable bushing which is provided with fastening means for rotatably engaging an axially inserted shaft, the springs having other terminal end portions engaged by respective oppositely rotatable lever arms mounted on the bushing and having end portions aligned with axially spaced projections of the knob shell, whereby axial movement of the shell causes the projections to pivot the lever arms in opposite angular directions to release the coil springs windingly from binding engagement with the wall of the race and permit rotation of the bushing and engaged shaft in response to rotary movement of the knob shell.

4049097, Sep 20, 1977

Jan 12, 1976

5/648613

Albert R. Pratt - Weston MA

Raytheon Company - Lexington MA

F16D 6700

192 8R

A push-to-turn knob assembly comprising a fixed race suitably disposed for encircling a rotatable shaft and having therein alternate pairs of resiliently spaced rollers which bindingly engage adjacent projections of an axially disposed cam cylinder, and interposed arcuate portions of a releasing disc which is rotatably maintained in the race by an overlying annular shoulder of the cam cylinder, the releasing disc having an outwardly extending flange wherein a plurality of slots are disposed in alignment with respective keys attached to an enclosing wall of a resiliently positioned knob shell.

4036079, Jul 19, 1977

May 3, 1976

5/682436

Albert R. Pratt - Weston MA

Raytheon Company - Lexington MA

G05G 506, G05G 110

74531

A brake lock knob assembly comprising a bushing disposed to bindingly engage an axially inserted shaft end portion and having a first frictional brake surface disposed in releasable resilient engagement with a second frictional brake surface of an adjacent nonrotatable member, and an axially movable knob shell having an inwardly projecting portion disposed to disengage the brake surfaces and having interlocking means for rotatably engaging the bushing.

4132129, Jan 2, 1979

Jun 3, 1977

5/803002

Albert R. Pratt - Weston MA

Raytheon Company - Lexington MA

A61B 512

74553

A push-to-turn knob assembly comprising a tubular hub disposed for attachment to an axially inserted end portion of a rotatable shaft and having a slotted end portion releasably engaged by a plurality of resiliently biased wedges annularly spaced apart within an encircling race, the hub and race being enclosed by an axially movable knob shell having projection means for disengaging the wedges from the hub and having keying means for engaging the hub and rotating the attached shaft to a desired setting.

4243285, Jan 6, 1981

Dec 26, 1978

5/973487

Charles F. Crowley - Peabody MA
Albert R. Pratt - Weston MA

Raytheon Company - Lexington MA

H01R 1362, H01R 1122

339 32R

A combination clamp and plug type electrical connector comprising a longitudinally extended pair of electrically conductive jaws mounted for relative pivotal movement and protruding from a dielectric sleeve having slidably supported therein resilient means for adjustably exerting an inwardly directed pressure on the jaws to maintain a clamping electrical contact with an interposed conductor, or for adjustably exerting an outwardly directed pressure on the jaws to maintain electrical contact with conductive wall portions of an electrical receptacle.