US2534525A - Closure operator - Google Patents

Description

Dec. 19, 1950 J, F, MQLLOY 2,534,525

CLOSURE OPERATOR Filed July 14, 1947 Patented Dec. 19, 1950 l www l Summum;

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way, on an adjacent building or any location convenient to the driver of an automobile approaching the door I.

The sleeve valve 36 has the open ended sleeve 43 driven forward by the incoming water pressure against the tension. of the soft spring 44, which closes the outlet 45 leading into the cylinder 25 ahead of the piston 21. This outlet 45 has the adjustable needle valve control 46.

The starting spring 41 encirclesthe piston rod between "the ,stuffing box 23 and the adjustable collar 48 fixed on the piston rod by the setscrew 49. It functions to overcome the inertia of the piston 21, before the door begins its descent.

This invention operates substantially as follows: When the door I is in the vertical closed position, the cable I4 is in the extendedcondition and the piston nut 29 advanced to abutment with the end of the stufng box 23 projecting into they cylinder 25, permitting an unobstructed inow of water from the tube 31 ahead of the piston.

Closing the switch 39, opens the valve 35 admitting water pressure through thevalve 36, which causes the sleeve 43 to' close the outlet 45, and pass forward through the tube 31 and retract the piston 21 to the position shown in Fig. 2.

l This causes the piston rod to pull the cable 20 and rotate the sheave I9 contra-clockwise, which also -reels in the cable I4 causing the coupling I6 to z'pull against the pulley guide at I3 and retract -the top of the door I and swing it on its pivots at 3. ,'Ih'e door is stopped at a position slightly less than horizontal by the adjustable stop 50 yon the wall 4, so that the door will automatically .tend to. close when the water pressure is stopped 'at the Valve 35 by opening the remote control switch at 39. When the switch at 39 is opened thevalve automatically closes, and the spring 44- backs up the sleeve 43 and opens the outlet 45. In the meantime pressure leakage through the bypass 39- -3I, permits'the starting spring 41 to advance the piston 21 past the outlet 45, permitting the water displaced by the advance of the piston to flow through the outlets 45 and 3| to the drain pipe 33. By, adjusting the needle valve 46 the advance of the piston can -be selectively delayed to retard the closing-of the door I, from one to twoor three minutes, sufficient time for the driver to :dismount from the car and leave the garage through the door I. In garages having other means of exit, the closing of the door I can b'e accelerated by adjusting the needle valves at 46 and 32.

'I'he opening of the door can be made fully automatic' by including the electric eye switch 5 I, in the circuit 4Ii-4I preferably mounted within an opening through thev door substantially alined with the rays of the headlights of the motor car. It will function to close the circuit and open the doorV when activated by the headlights.

For doors of unusual height, the sheave I9 is easily changeable to increase or reduce the gear "ratio between the sheaves 1-I9. The board' and its'mechanical assembly, may be mounted on either side of the door orl the ceiling, whichever i's the more practical. y

'.Wherever electrical control is not available, a vconventional stop valve may be substituted for the'magnetic valve 35, and located at the post 42 or at any desired ydistance for remote manual control -of the door opening mechanism.

The door may be maintained open by the latch 52 engaging a pin projecting from'the wall 4.

- piston moves forward.

Having fully described this invention and its mode of operation what I claim and desire to secure by Letters Patent is;V

l. A uid pressure unit comprising a cylinder having a stuiing -box closing its forward end; a pressure supply tube discharging into the forward portion of said cylinder and connected with a source of fluid pressure and having a stop valve therein, a piston slidable within said cylinder and having a bypass therethrough ,open to said cylinderonp'posite sides 'of said piston and a piston rod extending through said stuffing box; an intermediate valve interposed in said pressure-supply tube and having a side outlet discharging into said cylinder behind said piston when the 'piston is in an advanced position and said Vstopyalve is closed, so that the contents of the cylinder ahead of said piston may discharge through'said supply tube, intermediate valve, and into said cylinder behind said piston when said 2. A fluid pressure unit comprising acylinder having a stu'ing box closing one end; a pressure supply tube vdischarging into said cylinder adjacent said stufling box and connected'with a source vof fluid pressure and having a stop valve therein; a'-piston-slidable Within said cylinder and having a piston rod extending through said stuffing box with a bypass open to said cylinder on the oppo- -site 'sides of said piston; an intermediate valve interposed in said pressure supply tube and having a side outlet discharging into said cylinder "behind said piston whenv the'lpiston is in'an 'pipe therefrom; a pressure supply tube discharging into said cylinder adjacent said stuing box and connected with a'source of fluid pressure and having a stop valve therein; a piston slidable Within" 'said cylinder and having a piston rod .extending through' said'stuing box with a by- `pass in said rod open tosaid cylinder on the opposite sides of said piston; an intermediate valve interposed iri'saidA pressure supply tube'and having a side'outlet discharging into said cylinder head behind said piston vwhen the piston is in an advanced position and having a spring actuated sleeve with a pressure passage therethrough and opening said side outlet when said Astop'valve is closed and closing said side outlet .when said stop 'valve is open; and an expansive spring-'urging said piston forward when said stop vvalve'is closed, so that the fluid pressure ahead of said piston'may discharge through said supply tube, sleeve valve into said cylinder behind said piston and out through said drain pipe. '4. A fluid pressure unit comprising a cylinder vhaving a stufngv box closing its forward end; a v'pressure supply tube discharging into the forward portion'of'said cylinder and connected with a source of fluid pressure and having a stop valve therein; a' piston slidable within said cylinder andhaving a bypass therethrough open to said cylinder on opposite" sides of said piston and a piston rod extending through said stuihng box;

an intermediate valve interposed in said pressure supply'tube andhaving a side outlet discharging into said cylinder behind said piston when the piston is in an advanced position and said stop valve is closed, so that the contents of the cylinder ahead of said piston may discharge through said supply tube, intermediate Valve, and into said cylinder behind said piston when said piston moves forward; and a control means remote from said cylinder for opening and closing said stop valve.

5. A fluid pressure unit comprising a cylinder having a stufng box closing its forward end; a pressure supply tube discharging into the forward portion of said cylinder and connected with a source of fluid pressure and having a magnetically actuated stop valve therein; a piston slidable within said cylinder and having abypass therethrough open to said cylinder on opposite sides of said piston and a piston rod extending through said stuing box; an intermediate valve interposed in said pressure supply tube and having an outlet discharging into said cylinder in front of said piston when the piston is in an advanced position and said stop valve is closed, so that the contents of the cylinder ahead of said piston may discharge through said supply tube, intermediate valve, and into said cylinder behind said piston when said piston moves forward; an electric circuit including said magnetic stop valve actuating means and having a remote control switch therein for opening and closing said circuit; and a movable object attached to said piston rodand normally exerting a pull thereagainst.

JAMES F, MOLLOY.

REFERENCES CITED l5 The following references are of record in the le of this patent:

UNITED STATES PATENTS Number Name Date 20 1,421,002 Hagen June 27, 1922 2,330,006 Odenthal Sept. 21, 1943

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