![]() The invention includes a key supported above a key bed by a pivot pin and also has a guide pin for limiting horizontal movement of the key but allowing vertical movement thereof. The present invention simulates a mechanical-type tracker action in a key action of an electronic musical instrument. It should be noted that the steel pin remains in the depression of the curved spring and in the selected detent of the downwardly extending pin at all times. Upon key release the spring components return to their normal position with the steel pin being inclined slightly upward towards the rear of the key bed. This interaction applies additional force to the depressing of the key. The spring then adds to the downward pressure on the key as the detent in the downward extending pin is forced below the level of the depression in the curved spring so that the steel pin is now inclined downward to the rear of the key bed. At or near this horizontal position the toggling effect is achieved due to the downward force exceeding the spring force. With the key in the normal position the steel pin is inclined slightly upward towards the downward extending pin and, as the key is depressed, the pin travels downward causing the pin to achieve a horizontal position. The steel pin is held in place by the spring force from the spring. Extending between the downward extending pin and the curved spring is a steel pin having points at both of its ends to fit into the depression of the spring and the detent in the pin. This is so that the necessary force to achieve the toggling effect may be adjusted to be greater or lesser at the option of the player. The pin had several detents or depressions located around its circumference at different distances from the underside of the key. Near the front end of the key and in close proximity to the curved spring an adjustable pin is located extending downward from the underside of the key. The distal end of the curved steel spring included a depression for accommodating one end of a steel pin. This was done by attaching a curved steel spring to the underside of the front pin rail, permitting the curved portion of the spring to extend upwards. ![]() G10B- ORGANS, HARMONIUMS OR SIMILAR WIND MUSICAL INSTRUMENTS WITH ASSOCIATED BLOWING APPARATUSĪnother method was devised by E.Assignors: ALLEN ORGAN COMPANY Status Expired - Fee Related legal-status Critical Current Links ![]() Application granted granted Critical Publication of US4479415A publication Critical patent/US4479415A/en Anticipated expiration legal-status Critical Assigned to MUSICCO, LLC reassignment MUSICCO, LLC ASSIGNMENT OF ASSIGNORS INTEREST (SEE DOCUMENT FOR DETAILS). reassignment ALLEN ORGAN COMPANY, A CORP. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.) Filing date Publication date Application filed by Allen Organ Co filed Critical Allen Organ Co Priority to US06/456,061 priority Critical patent/US4479415A/en Assigned to ALLEN ORGAN COMPANY, A CORP. Original Assignee Allen Organ Co Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.) Haberstumpf Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.) Expired - Fee Related Application number US06/456,061 Inventor Harold E. Google Patents Tracker action touch for keys in a keyboard musical instrumentÄownload PDF Info Publication number US4479415A US4479415A US06/456,061 US45606183A US4479415A US 4479415 A US4479415 A US 4479415A US 45606183 A US45606183 A US 45606183A US 4479415 A US4479415 A US 4479415A Authority US United States Prior art keywords key contact spring contact means electrical contact Prior art date Legal status (The legal status is an assumption and is not a legal conclusion. Google Patents US4479415A - Tracker action touch for keys in a keyboard musical instrument US4479415A - Tracker action touch for keys in a keyboard musical instrument
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