# US 4,398,175 A · Apparatus for automatically cancelling a turn signal

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- Number: US 4,398,175 A
- Document ID: US4398175A
- Status: Granted
- Kind: A
- Application number: 06/179,774
- Filed: 1980-08-20
- Granted: 1983-08-09
- Earliest claimed: 1980-08-20
- Inventors: Gregory G. Gamba
- Web page: https://patentgrep.com/patent/US4398175A

## CPC

- B60Q 1/40: having {mechanical, electric or electronic} automatic return to inoperative position
- B60Q: ARRANGEMENT OF SIGNALLING OR LIGHTING DEVICES, THE MOUNTING OR SUPPORTING THEREOF OR CIRCUITS THEREFOR, FOR VEHICLES IN GENERAL

## Abstract

An apparatus for automatically cancelling a turn signal, responsive to displacement of the center of gravity of a vehicle such as a motorcycle in moving into a turn. The apparatus includes means for signalling the turn, means for retaining the turn signalling means in turn signalling position or releasing the turn signalling means from turn signalling position, and means for controlling the turn signal retaining means responsive to displacement of the center of gravity of the vehicle in moving into the turn.

## Claims

### Claim 1

An apparatus for automatically cancelling a manually-initiated vehicle turn signal responsive to movement of the vehicle in the direction of the turn so signalled and for maintaining the turn signal in cancelled condition until a further turn signal is manually initiated by closing one of a pair of vehicle turn signal circuits, comprising:
(a) a frame, adapted to be mounted on the vehicle;
(b) an arm, pivotally mounted on the frame, manually selectively movable in the direction of the intended turn of the vehicle, which includes portions adapted to enable the arm to be retained in the manually selected position, and a pair of electrical contacts, movable with the arm relative to the pair of vehicle turn signal circuits and adapted to close one of the vehicle turn signal circuits responsive to such movement of the arm;
(c) means for biasing the arm in a non-signal-initiating position, connected to the frame;
(d) means for engaging the arm retention-enabling portions, reciprocally mounted in the frame;
(e) means for biasing the engaging means into engagement with the arm; and
(f) means, mounted in the frame and connected to the arm engaging means, for automatically releasing the arm from the manually-selected position responsive to gravitational force exerted on such automatic arm-releasing means upon displacement of the center of gravity of the vehicle on movement of the vehicle in the direction of the signalled turn, to open the selectively-closed vehicle turn signal circuit and cancel the turn signal.

### Claim 2 (depends on 1)

An apparatus as in claim 1, further comprising means for manually releasing the arm from the manually-selected position, to open the selectively closed vehicle turn signal circuit and cancel the turn signal.

### Claim 3 (depends on 1)

An apparatus as in claim 1, in which the automatic arm releasing means comprise a weight, means for pivotally connecting the weight to the frame, and means for connecting the weight-connecting means to the arm engaging means, reciprocally movable responsive to pressure exerted thereon by the weight-connecting means.

### Claim 4 (depends on 3)

An apparatus as in claim 3, further comprising means for absorbing movement of the weight responsive to vibration.