US3732494A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Pick-up adaptor for sensing speed
Assignee: Motorola Solutions Inc
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Filing: 1972-06-13
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Granted: 1973-05-08
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Expires: 1992-06-13
Abstract
Abstract A pick-up mounting adaptor is positioned through a support housing of an engine so that a pick-up probe can be precisely spaced from the teeth on the ring gear behind the housing to develop pulses usable to operate a tachometer to indicate engine speed. The precise spacing of the end of the pick-up probe from the teeth on the ring gear is obtained without seeing the respective relationships between the pick-up probe and the ring gear by providing calibrated threads on the mounting adaptor for the probe so that after abutment of the probe with the ring gear, it can be threadedly retracted from contact therewith a predetermined number of turns to provide the accurate spacing necessary.
Inventors
- 👤 J Dragon
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-02 16:24
CPC Classifications
G; G01; G01P; G01P3/00; G01P3/42; G01P3/44; G01P3/48; G01P3/481; G01P3/488
Claims Analysis
Total Claims: 7
Claim 1
Independent Claim
178 words
An adaptor for mounting a tachometer pickup in an aperture of an engine housing for sensing the movement of a device forming a part of the engine which is driven in proportion to engine RPM, the adaptor producing electrical pulses which are connected to the tachometer for indicating the rate of movement of the device, including in combination: an electromagnetic pickup for connection to the tachometer, an engine housing, a device forming a part of the engine which is driven in proportion to engine RPM, a sleeve mounted in the apertures of said housing, said pickup slidably mounted in said sleeve and being slid into contact with said dEvice, connector means threadably secured to said sleeve, clamping means for securing said pickup to said connector means with said pickup being positioned in contact with said device, said connector means with said pickup connected thereto by said clamping means being threaded along said sleeve a predetermined amount thereby sliding said pickup therewithin out of contact with said device to precisely set the spacing between said pickup and the device.
Claim 2
Dependent Claim
178 words
An adaptor for mounting a tachometer pickup in an aperture of an engine housing for sensing the movement of a device forming a part of the engine which is driven in proportion to engine RPM, the adaptor producing electrical pulses which are connected to the tachometer for indicating the rate of movement of the device, including in combination: an electromagnetic pickup for connection to the tachometer, an engine housing, a device forming a part of the engine which is driven in proportion to engine RPM, a sleeve mounted in the apertures of said housing, said pickup slidably mounted in said sleeve and being slid into contact with said dEvice, connector means threadably secured to said sleeve, clamping means for securing said pickup to said connector means with said pickup being positioned in contact with said device, said connector means with said pickup connected thereto by said clamping means being threaded along said sleeve a predetermined amount thereby sliding said pickup therewithin out of contact with said device to precisely set the spacing between said pickup and the device.
Claim 3
Dependent Claim
12 words
The adaptor according to claim 1 wherein said device comprises a gear.
Claim 4
Dependent Claim
24 words
The adaptor according to claim 1 wherein said sleeve includes a pipe thread for mounting the same in the aperture of the engine housing.
Claim 5
Dependent Claim
89 words
The adaptor according to claim 1 including first and second nuts, said sleeve having first and second external spaced apart threaded portions on one end thereof and with said sleeve being inserted in said aperture, said first nut is secured to the first threaded portion on the end of said sleeve extending inside said housing and said second nut is secured to the second threaded portion spaced apart from said first threaded portion of said sleeve and extending outside said housing to thereby mount said sleeve in said housing.
Claim 6
Dependent Claim
49 words
The adaptor according to claim 4 including a locking nut threadably secured to said second threaded portion of said sleeve which extends outside said housing, said locking nut locking said connector means in position on said sleeve with said pickup being precisely set in position relative to the device.
Claim 7
Dependent Claim
38 words
The adaptor according to claim 5 wherein said clamping means comprises a clamp ring fitted to said pickup and a compression fitting having a threadable portion secured to said connector means for locking said pickup and connector together.
References Cited (Backward Citations)
US2556471A
Cited
US3115032A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1976-05-07 | 1976-11-06 | 1977-05-08 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1980-05-07 | 1980-11-06 | 1981-05-08 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1984-05-07 | 1984-11-06 | 1985-05-08 | $7700.00 | Window Closed / Lapsed |