US836572A - Safety attachment for elevator-doors. - Google Patents

Description

No. 836,572. PATENTED NOV. 20, 1906. J. F. GILL & J. J. MEEHAN. SAFETY ATTACHMENT FOR ELEVATOR DOORS.

APPLICATION FILED SEPT. 17. 1906.

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QR); in uses UNITED sTArns PATENT JAMES F. GILL AND JOHN J. MEEHAN,-OF NEWARK, NEW JERSEY.

' SAF ETY ATTACHMENT FOR ELEVATOR-DOORS- Specification of Letters Patent.

Patented Nov. 20, 1906.

Application filed September 17, 1906. Serial No. 334,927.

T0 all whom, it may concern:

Essex and State of New Jersey, have invented certain new and useful'Improvements in Safety Attachments for Elevator-Doors, of which the following is a specification.

In the operation of elevators fatal accidents are liable to and frequently do occur, owing to the car being carelessly or inadvertently started prior to closing the shaft-door, thus resulting in persons who may attempt to enter the car at the moment of its startingbeing caught and crushed between the car and shaft. Also accidents in the nature of persons falling into the elevator-shaft sometimesfollow as a result of failure through negligence to close the shaft-door.

This invention relates to safety attachments for elevators embodying a movable contact member or controller operable through movements of the shaft-door, and

has for its objects to provide a comparatively simple inexpensive device of this character which may be readily installed for use and one whereby the car-operating -mechanism is so governed as to prevent starting of the car until the shaft-door has been closed.

With these and other objects in view the invention comprises the novel features'of construction and combination of parts more fully hereinafter described.

In the accompanying drawings, Figure 1 is a detail view in elevation of a portion of an elevator equipped with a safety device embodying the invention. Fig. 2 is a detail s'ectional view,on an enlarged scale, of the attachment and attendant parts. Fig. 3 is a section taken on the line 3 3 of Fig. 2. Fig. 4 is a section taken on the line 4 4 of Fig. 2. Fig. 5 is a .detail perspective view of the flange or abutment.

Referring to the drawings, 1 designates an elevator-car arranged for travel, as usual, in

a shaft, the front wall 2 of which is provided with a doorway normally closed by a door 3,

these parts which are conventionally shown -herein being of the usual or any appropriate construction and material, except that the door 3 is in accordance with the invention provided at. itsrear edge with an inturned vertical flange or abutment 4.

Attached to the outer faced? the front wall of the car 1 is a pair of bearing-brackets 5, between which there is pivoted at its elbow on a vertical pintle 6 a horizontallymovable contact member or controller 7 in.

the form of a substantially V-shaped metal piece presenting a pair of portions or arms 8 9 and having at its elbow in rear of the pivot 6 a slot or recess 10, in which is fixed a bearing-pin 11, while movably sustained in a bearing 12, by means of a pin 13., is a casing 14,- in which is slidably and telescopically disposed a tubular plunger 15, projected through an opening 16in the car-wall and terminating at its outer end in an extension 17, having a recess 18 to receive pin 11, and

with a pair of inclined walls 19,

adapted ingly-inclined wall 20 at the bottom of recess i 10, there being housed in the plunger and its casing 14 a normally expanded spring 21 for a purpose which will later appear.

Extended through the arm 8 of the contact member and insulated therefrom by an insulating-block 22 is a binding-post 23, on.

the ends of which there are fixed contactpieces 24, adapted to contact with the outer ends of contacts 25, carried by bindingposts 25, extended through the car-wall and insulated therefrom by insulating-blocks 26,

there being attached to the inner ends of the posts 25, by means of nuts 27, the ends of electric conductor-wires 28, by which the current is taken from a suitable sourceand supplied for actuating the car-operatingmechanisni. (Not shown.)

In'practice when the door 3 is closed the circuit is completed between the generator or other source of electrical energy and the caroperatingmechanism through the wires 28, owing to the metallic connection between the contact-pieces 24, carried by the controller 7, and the contacts 25, carried by the'binding posts 25. When the door 3 is moved to open position, the flange 4 engages the controller-arm 9 and swings the controller to the dotted-line position seen in Fig. 2, thereby throwing the contact-pieces 24 out of engagement with the conta'cts 25 and breaking the circuit, thus to render. the car-operating mechanism inoperative until the door is again closed, it being noted that as the door moves to closed position the flange 4 engages the arm 8 for returning the icontroller to nor mal position with the contact-pieces in metallic connection for completing the circuit. During movement of the member 7 in either direction the plunger 15 will move into the Having qmbination o 2 O a pivoted member in proximity to said pair oi contacts and adapted to be swung in a plane transverse, to the plane of the door to make or break the circuit through said conductors,

casing, thereby compressing the spring 21,

which on again expanding acts ,upon the plunger for holdin the controller in the I osition to which it 1s set, it being noted t at when the plunger is in looking. position it stands off center and is maintained in such position owing to en agenkent of one of the inclined" walls 19 wit the inclined wall 20. It is. to be particularly observed that under this construction provision is made for absolutel preventing operation of the car except-w en the door 3 is in closed position, thus obviating accidents or the possibility of accidents owing to the door being carelessly left open.

thus described our invention, what weclaim a 1 In a safety attachment for elevators, the p a car, a door there or, a pair of power-conductor contacts on the car-wall an abutment on the door for engagement with a said pivoted member to move the same to make or break position when the door is moved with res t to the car, and meansassociated with t e pivoted member tending to resist its pivotal movement. I

2. In an elevator safety appliance, the combination with the car and door members ofa air of contacts carried by one of sai mem era, a pair of power-conductors con-' nected res ectively to said contacts, a contact mem er pivoted to swing in a plane transverse to the plane of the door and adapted to bridge the said pair of contacts for completing the circuit through said conductors an abutment on the other of said first-name members for enga ement with the pivoted member to move t e same to contacting or non-contacting position when the door is moved to its several positions with respect tothe car, and means for resisting the movement of the'pivoted member from either of "its extreme positions.

3. In a safety attachment for elevators and in combination with the elevator car and door, a pair of spaced contacts on the car, a pair of; electric conductors connected respectively with said contacts, said conductors being included in the circuit for supplying motive power'to the car; a horizontally-movable contact member pivotally sustained on the 'car' and adapted to bridgethe first-named mova contacts for completing the circuit 'through the conductors, said movable contact being adapted for movement to position to break said circuit, an abutment on the door for engagement with the movable member to move the same to contacting or non-contacting position respectively when the-door is closed or opened, and means for locking the movable contact in either of said positions.

4. In a safety attachment for elevators and in combination with the elevator-car and door, a pair of spaced contacts on the car, a pair of electric conductors connected respectively with said contacts, said conductors being included in the circuit for sup lying motive power to the car, a horizontal y-mbvable contact member pivotally sustained on the car, and adapted to brid e the first-named contacts for completing t ,e circuit through the conductors,;s aid movable contact being ted for movement to position to break adaip sai circuit, an abutment on the door for engagement with the movable 'member to move thesame to contacting or non-contacting 0- sition respectively when the-door is close or opened, and a spring-pressed plunger for looking the movable contact in either of said positions. I 5. Ina safety attachment for elevators and in combination with the elevator car and door, a pair of spaced contact members on the car, a pair of electric conductors connected respectively with said contacts, said conductors llaeing included in an elfictri'c circuit for an motive owe'r tot ecar, a ivotin pp li lii contact ihelnber adapted t d bridg e the contacts for completing the circuitthrough said conductors, said movable contact be ing adapted for movement to contacting or non-contacting position, an abutment on the door for operating the movable contact during mdvement of the door to open or closed positipn, a casing pivotally sustained On-th'e door, a tubular plunger telescopically en- Eaged with the casing, and a'spring disposed

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