Automatic safety switch
OwnerErwald E. Stockinventor
Life of this patent
Estimating the term…
Abstract
A safety switch for use with a cow trainer has a frame in the form of a sleeve constructed from an electrically insulating material. Slits provided in one end of the sleeve receives a plate portion of an electrically conductive clamp which is engageable with an electrically conductive overhead wire. The clamp is intermittently engaged by a cow trainer supporting electrically conductive contact element slidably mounted on the sleeve and supporting a cow trainer. By proper positioning of a contact bar of the cow trainer over the back of a cow, the cow will contact the bar and will move the contact element into engagement with the clamp whenever the cow humps its back.
Claims11
A safety switch for use with cow trainer, the switch comprising, in combination:
- a. a frame;
- b. clamp means mounted on the frame for engaging an electrically conductive wire;
- and
- c. contact means slidably mounted on the frame for movement toward and away from the clamp means and connectible to a device to be energized for being normally pulled away from the clamp means by the device and breaking contact between the contact means and the clamp means;
- and the frame is a sleeve constructed from an electrically insulating material, the clamp means and contact means being constructed from an electrically conducting material;
- and the contact means including a longitudinally extending contact element arranged within the sleeve, the contact element being provided with a longitudinal slot, and a pin disposed extending into the sleeve transversely thereof and engaging in the slot for permitting limited movement of the contact element relative to the sleeve.
In combination with a stall and a gutter, an overhead electrically conductive wire above the stall, and a cow trainer having a shaft and a contact bar mounted on an end of the shaft and arranged substantially perpendicular to the shaft, a safety switch, comprising, in combination:
- a. a frame;
- b. clamp means mounted on the frame for engaging the overhead electrically conductive wire and supporting the switch from the wire;
- and
- c. contact means slidably mounted on the frame for movement toward and away from the clamp means and connected to the shaft of the cow trainer for energizing the cow trainer and supporting same from the switch and the electrically conductive wire;
- and the shaft is constructed from a pair of cooperating lengths of angles and a clip in the form of a substantially C-shaped member constructed from a springy material and provided with a pair of spaced windows in which the angles are retentively, and releasably, disposed.
In combination with a stall and a gutter, an overhead electrically conductive wire above the stall, and a cow trainer having a shaft and a contact bar mounted on an end of the shaft and arranged substantially perpendicular to the shaft, a safety switch, comprising, in combination:
- a. a frame;
- b. clamp means mounted on the frame for engaging the overhead electrically conductive wire and supporting the switch from the wire;
- and
- c. contact means slidably mounted on the frame for movement toward and away from the clamp means and connected to the shaft of the cow trainer for energizing the cow trainer and supporting same from the switch and the electrically conductive wire;
- and the frame is a sleeve constructed from an electrically insulating material, the clamp means and contact means being constructed from an electrically conducting material;
- and the contact means including a longitudinally extending contact element arranged within the sleeve, the contact element being provided with a longitudinal slot, and a pin disposed extending into the sleeve transversely thereof and engaging in the slot for permitting limited movement of the contact element relative to the sleeve.
In combination with a stall and a gutter, an overhead electrically conductive wire above the stall, and a cow trainer having a shaft and a contact bar mounted on an end of the shaft and arranged substantially perpendicular to the shaft, a safety switch, comprising, in combinaton:
- a. a frame;
- b. clamp means mounted on the frame for engaging the overhead electrically conductive wire and supporting the switch from the wire;
- and
- c. contact means slidably mounted on the frame for movement toward and away from the clamp means and connected to the shaft of the cow trainer for energizing the cow trainer and supporting same from the switch and the electricconductive wire;
- and the contact means including a longitudinally extending contact element arranged on the frame, the contact element being provided with a longitudinal slot, and a pin disposed extending from the frame engaging in the slot for permitting limited movement of the contact element relative to the frame and clamp means.
In combination with a stall and a gutter, an overhead electrically conductive wire above the stall, and a cow trainer having a shaft and a contact bar mounted on an end of the shaft and arranged substantially perpendicular to the shaft, a safety switch, comprising, in combination:
- a. a frame;
- b. clamp means mounted on the frame for engaging the overhead electrically conductive wire and supporting the switch from the wire;
- and
- c. contact means slidably mounted on the frame for movement toward and away from the clamp means and connected to the shaft of the cow trainer for energizing the cow trainer and supporting same from the switch and the electrically conductive wire;
- and the frame is in the form of a sleeve having spaced ends and provided with opposed, substantially coplanar slits in one of the spaced ends, the clamp means including a plate inserted into the slits, a leaf spring provided on the plate, with the latter being further provided with cantilevers bracketing the spring and terminating in arcuate portions, and a clamp element having a T portion disposed between the leaf spring and the arcuate portions for being biased into a position including a wire engaged between the clamp element and arcuate portions.
Dependencies are inferred from the claim text.