US3823291A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Electric switch for portable electric appliances
Assignee: Individual
•
Filing: 1973-01-15
•
Granted: 1974-07-09
•
Expires: 1993-01-15
Abstract
Abstract An electric switch, which is particularly suitable for controlling the operation of a portable electric appliance, for example a lawn mower, comprises a support, a first contact fixed relative to said support, a second contact movable into and out of engagement with the first contact, a contact-actuating member movable relative to the support for effecting electrical contact between the first and second contacts, a locking means movable relative to said support between a first position in which it prevents engagement of said first and second contacts and a second position in which it allows engagement of the first and second contacts, and means urging the locking means towards said first position. The locking means may comprise a push button slidably mounted on the support, this push button preferably being positioned relative to the contact-actuating member so that both the push button and the contact-actuating member can be operated by the fingers of one hand of a person operating the appliance on which the switch is mounted.
Inventors
- 👤 E Milcoy
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 15:06
CPC Classifications
A; A01; A01D; A01D34/00; A01D34/01; A01D34/412; A01D34/63; A01D34/67; A01D34/68; A01D34/6806; A01D34/6818; A01D34/82; A01D34/828; H; H01; H01H; H01H3/00; H01H3/02; H01H3/20; H01H9/00; H01H9/02; H01H9/06
Claims Analysis
Total Claims: 7
Claim 1
Independent Claim
197 words
In combination with a hollow-elongated handle of a portable electric appliance, said handle being adapted for gripping by the hand of a person using the appliance, said handle having a first side and a second side, a switch within the said handle having contact means to open and close the electrical circuit of the appliance, and manually operable switch operating lever pivoted at one end and means mounted on the first side of the handle for engagement by the fingers of a person using the appliance and capable of movement between switch-open and switch-closed positions; means slidably mounted on the second side of the handle for movement lengthwise of the handle and positioned for engagement by a finger of a person using the appliance, means biasing the said slidable means to a first position, means on said slidable means engageable by said operating means when said slidable means is in said first position but not when in a second position, to prevent movement of said operating means into switch-closing position in said first position but not in said second position, whereby switch cannot be closed unless both said slidable means and said operating means are simultaneously operated.
Claim 2
Dependent Claim
197 words
In combination with a hollow-elongated handle of a portable electric appliance, said handle being adapted for gripping by the hand of a person using the appliance, said handle having a first side and a second side, a switch within the said handle having contact means to open and close the electrical circuit of the appliance, and manually operable switch operating lever pivoted at one end and means mounted on the first side of the handle for engagement by the fingers of a person using the appliance and capable of movement between switch-open and switch-closed positions; means slidably mounted on the second side of the handle for movement lengthwise of the handle and positioned for engagement by a finger of a person using the appliance, means biasing the said slidable means to a first position, means on said slidable means engageable by said operating means when said slidable means is in said first position but not when in a second position, to prevent movement of said operating means into switch-closing position in said first position but not in said second position, whereby switch cannot be closed unless both said slidable means and said operating means are simultaneously operated.
Claim 3
Dependent Claim
39 words
The combination as claimed in claim 1 in which said slidable means is a member having an extension inward of said handle, and said operating member is recessed to receive said extension in said second position of said member.
Claim 4
Dependent Claim
54 words
The combination as claimed in claim 2 having a plate member extending lengthwise in said handle, fixed contact means mounted on said plate member, and movable contact means including a leaf spring having a contacting surface on one end engageable with and disengageable from said first contact means by movement of said operating member.
Claim 5
Dependent Claim
54 words
The combination as claimed in claim 1 having a plate member extending lengthwise in said handle, fixed contact means mounted on said plate member, and movable contact means including a leaf spring having a contacting surface on one end engageable with and disengageable from said first contact means by movement of said operating member.
Claim 6
Dependent Claim
20 words
The combination as claimed in claim 4 in which said leaf spring biases said movable contacting surface to switch-open position.
Claim 7
Dependent Claim
20 words
The combination as claimed in claim 4 in which said leaf spring biases said movable contacting surface to switch-closed position.
References Cited (Backward Citations)
No citation records indexed.
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1977-07-08 | 1978-01-07 | 1978-07-09 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1981-07-08 | 1982-01-07 | 1982-07-09 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1985-07-08 | 1986-01-07 | 1986-07-09 | $7700.00 | Window Closed / Lapsed |