Hartwell Corporation

Other

L Richard Poe

Raymond E Harmon

William R Bourne, Jr

William R Bourne

Clifford A Davis

Disclosed is a cinch-up latch for securing an aircraft panel to a keeper. The cinch-up latch includes a bracket, a handle, a trigger lock, a hook, and a linkage. The handle is moveable between a closed and an open position and includes a handle base plate. The trigger lock is pivotably mounted to the handle so that when the handle is in the closed position, the trigger lock engages the keeper. When the handle is in the open position, the trigger lock is disengaged from the keeper. The hook is rotatably mounted to the handle and is used for engaging the keeper. The linkage is rotatably mounted to the bracket, the handle, and the hook. The linkage has an over-center position which prevents the hook from disengaging the keeper when the handle is in the closed position. The trigger lock engages the linkage when the handle is in the closed position.

Cinch-up latch

A fastener apparatus having a bolt member with a fast lead threaded portion, a barrel member with a fine lead threaded portion, a collar member interposed between the bolt and the barrel and including both fast lead and fine lead threads to mesh with the respective threads on the bolt and the barrel, and an actuator for coupling two of the three members together so that in one instance the fastener is drawn rapidly on fast lead threads through a significant distance and in the second instance the fastener is drawn together on fine lead threads providing additional mechanical advantage.

Multiple pitch threaded fastener apparatus

The presently preferred embodiment of the invention is a multiple speed fastener having a first pair of interengageable threaded members with a first pitch and a first thread direction, a second pair of interengageable threaded members with a second pitch different from the first pitch and a second thread direction different from the first thread direction, the first pair including a first actuator threadably engageable with a first threaded member and the second pair including a second actuator threadably engageable with a second threaded member, and a coupling means for coupling the first pair to the second pair, with the first actuator and the coupling means having first means for selectively engaging the first actuator and coupling means to rotate the coupling means with the first actuator, and with the coupling means and the second actuator having second means for engaging the second actuator to rotate the second threaded member when the first actuator and coupling means are engaged.

Multiple speed fastener

A rod end lock for latching heavy objects. The rod end lock has a barrel with a mounting end and a latch end. The latch end has a bite portion such that a keeper is secured at a location centered about the axis of the barrel. The mounting end is coaxial with the barrel and has the same centerline. A locking element is movably connected to the barrel and is biased in a closed position such that the locking element and the bite portion form an enclosed space therebetween for latching the keeper. The keeper is released by actuating the locking element to the open position thereby overcoming the bias to the closed position.

Rod end lock

A latch handle assembly for securing a latch having a trigger pin includes a handle pivotally joined to the latch. A trigger latch is pivotally joined to the handle and includes an opening engageable onto the trigger pin. A cam is pivotally joined to the handle and is engageable onto the trigger pin to compensate for any clearances between the parts, and thereby prevent chattering and excessive wear within the handle assembly due to vibration.

Trigger lock cam

Latch mechanisms for latching two bodies in both tension and shear. A longitudinally extending latching bolt is associated with a latching assembly having an overcenter link mechanism controlled by a lever. The overcenter link mechanism includes a slot cooperating with a pin to provide two effective lengths to the fully extended linkage. A laterally extending notch provides a shoulder intermediate the ends of the slot to receive the pin. A keeper is slidably associated with a keeper assembly to engage the longitudinally extending bolt to prevent its withdrawal from the keeper assembly. Inclined surfaces between the latching bolt and the keeper function to engage or disengage the spring biased keeper with movement of the latching bolt in a preselected direction.

Latch

A fastener for securing two objects or structures together in a predetermined relationship. The fastener has a fastener body including a spacer which defines a predetermined distance between the two objects. A first locking element is attached to one side of the spacer and a second locking element is attached to the other side of the spacer. The fastener body is adapted to receive a plunger which when actuated will cause the locking elements to secure the first object and second object a predetermined distance apart.

Stand-off fastener

A flush type rotary drive means which is caused to move between a position flush with a surrounding surface and a protruding position as the latch is moved between its locked position and its unlatched position, the drive means, by reason of its protruding position, being readily visible to indicate the partially or completely unlocked condition of the latch; one embodiment being arranged to move a reciprocable latch; another embodiment being arranged to turn a rotary latch.

Flush type rotary drive for latches

A toggle latch having three linkage means, the first and third linkage means being pivotally connected to a frame and the second linkage means being pivotally connected between the first and third linkage means. The first linkage means having a pivot slidably restrained within a frame aperture for moving between a first position when the toggle latch assembly is secured and a second position where the toggle latch assembly is opened. In one embodiment, a forth linkage means is positioned between the frame and the slidable pivot of the first linkage means in order to decrease the frictional loading on the slidable pivot.

Toggle latch assembly

A tension adjuster for flush type latches, such as is used by aircraft, of the type wherein a handle is received in an opening and is pivotable between a flush position and an initial open position while the latch arm remains in hooked engagement with a keeper, the tension adjuster utilizing a screwthreaded member to effect longitudinal adjustment of the keeper and being accessible to a turning tool insertable into the end of the opening when the handle is in its initial open position.

Flush type latches

A rotary latch and its method of operation, the latch being caused to move between a position flush with a surrounding surface and a protruding position as the latch is moved between its latched position and its unlatched position, a rotary drive means, by reason of its protruding position, being readily visible to indicate the unlatched condition; the rotary drive means including a control sleeve having radially outwardly facing detent pockets engaged by a radially movable pin, one socket being engaged when the latch is in its flush-latched condition, second socket being engaged when in its fully unlatched condition, and a third socket being engaged as a secondary latch.

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Long Beach, CA, United States of America

L Richard Poe