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Publication numberUS2690085 A
Publication typeGrant
Publication dateSep 28, 1954
Filing dateNov 7, 1951
Priority dateNov 7, 1951
Publication numberUS 2690085 A, US 2690085A, US-A-2690085, US2690085 A, US2690085A
InventorsHoward G Freeman
Original AssigneeRockwood Sprinkler Co
Export CitationBiBTeX, EndNote, RefMan
External Links: USPTO, USPTO Assignment, Espacenet
Hand and power-operated gearing
US 2690085 A
Abstract  available in
Previous page
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Claims  available in
Description  (OCR text may contain errors)

Sept. 28, 1954 E N 2,690,085

HAND AND POWER-OPERATED GEARING Filed Nov. 7, 1951 "1' /23 a s a I i i so 40 1 238 ,-24 N44115:! H v i i u. u| 42 26 .2: 1 IJIIHIIIIHHII II IE I: 34

Patented Sept. 28, 1954 HAND AND POWER-OPERATED GEARING Howard G. Freeman, Worcester, Mass., assignor to Rockwood Sprinkler Company, Worcester, Mass., a corporation of Massachusetts Application November 7, 1951, Serial No. 255,216

1 Claim.

This invention relates to a fire-fighting turret and more particularly to a system for remotely training a fire fighting turret by automatic hydraulic means and by manual operation.

The fire fighting turret embodied in this invention is described as mounted on a vehicle although it is not to be thus limited. For example the turret device may be mounted on the roof of a crash truck. In the past it has been customary to train these turrets by hand to direct the fire fighting material on a fire. Using this method, the fire apparatus could not be brought too close to a fire because the operator could not withstand the heat of the blaze. The operator was also exposed to the weather, which in northern climates can be very severe. Therefore, the principal object of this invention is to provide a fire fighting turret which can be trained from a remote position thus shielding the operator from the fire and permitting the turret to be easily and accurately trained.

Another object of this invention is to provide a fire fighting turret which can be remotely trained by manual operation when the hydraulic system becomes inoperative.

This and other features of this invention will be described in the specifications and claim with reference to the accompanying drawings.

Fig. 1 is a pictorial view of the turret mounted on the roof of a crash truck; Fig. 2 is an elevation of the turret training mechanism mounted on the turret; Fig. 3 is a schematic diagram of the turret training mechanism; Fig. 4 is a schematic diagram of the remote control hydraulic system for training the turret.

Referring to Fig. 1 this invention is described as embodied in a fire fighting turret of the type disclosed in the co-pending application of Freeman Serial No. 255,217 dated November 7, 1951. The turret device 2 is mounted on a vehicle 4 which in my illustration is a crash truck. lhe turret can be trained and elevated to direct a fire extinguishing material on a fire. This turret is provided with an internal impingement discharge nozzle 5 producing fog in accordance with the principles disclosed in U. S. Patent No. 2,302,021 dated November 17, 1942 granted to Howard G. Freeman. A cradle 6 is rotatably mounted about the discharge nozzle. At one end of the cradle a shaper screen 8 is secured for wide angle dispersion of the fire extinguishing material, while at the other end of the cradle a stream shaper tube In is mounted to provide for a concentration of the extinguishing material. As disclosed in the copending application of Freeman Serial No. 259,378 filed December 1, 1951, the turret can be elevated and the cradle can be rotated about the discharge nozzle by remote automatic hydraulic means, and in the event of automatic failure by remote manual hydraulic means. In providing for remote training of the turret in this invention, the turret device becomes completely operable by both automatic and manual control from a remote position.

Referring now to Figs. 1, 2, and 3 a turret base 12 is bolted to the inside roof of the crash truck. The turret device 2 is rotatably mounted Within the turret base. A train mechanism, comprising a multiplicity of gears as will be hereafter fully described, is connected to the turret shaft 13 which is integral with the turret device 2. A bracket l4 mounted on the turret base, supports the main part of the train mechanism. Directly connected to the train mechanism is a manually operated handle it which is located at a distance from the turret device. To train the turret manually, the operator merely turns the handle it, driving the train mechanism, rotating the turret shaft [3, and training the turret.

An hydraulic motor l8, which is supported by the bracket [4, is geared directly to the train mechanism by the hydraulic motor gear 20. Hydraulic lines 46 and 48 (Fig. 4) lead from either side of the motor to a remote manually operated control valve 50 which is located near the manual handle [6, both preferably situated within easy reach of the truck driver in the cab of the crash truck. Connected to the valve is an oil supply line 52 to which oil from an oil reservoir 54 is delivered at a suitable pressure of between 500-700 pounds per square inch by an electrically driven motor 56. To train the turret hydraulically from this remote position, the operator merely positions the control valve 59 to permit oil to fiow through either line to the hydraulic motor [8, actuating said motor either in a clockwise or counterclockwise direction, and thus driving the gear mechanism to train the turret. When the operator positions the valve 50 to connect the supply line 52 to one hydraulic line 46 for example, the other line 48 is simultaneously connected to a return line 58 which returns the oil forced out of motor l8 to the reservoir 54.

Referring more particularly to the accompanying drawings, the turret device 2 is rotatably mounted in the turret base [2. The base 12 is bolted to the inside roof of the crash truck while the turret device is mounted within the 3 base through an opening in the roof of the truck. Integral with the turret device and extending through the turret base is the turret shaft l3. Mounted on the turret shaft I3 is the turret shaft gear 22 which is driven by the train mecha nism. As gear '22 is driven, turret shaft l3 rotates therewith, training the turret. The turret base bracket 1:4 which supports the .-main art of the gearing mechanism is :supported by ithe bracket 23 (Fig. 2) which is bolted to the turret base [2.

Near one edge of bracket L4, .a handwheel drive shaft 24 is rotatably mounted within a handwheel bearing box 26 which is fixed to the bracket M. The shaft 24 :extends vertically downward through a gear cover 23. the lower end of the shaft 24, the handwheel 3B is zmounted thereon. Handle l6 fixed to the handwheel an is provided for manual operation. The handwheel 38 is locked to the shaft with a lock pin 32. The handwheel will rotate with .the shaft at all times whether in manual or ,hydraulicioperation.

Also mountedon the shaft 25 within .the gear space is the handwheel ,gear which rotates With the shaft. Gear meshes with .the teeth of intermediate gear .36 and ,in manual operation drives this gear. Also emeshing with the :teeth of the intermediate ;4ear liS the hydraulic motor gear 20. In hydraulic operation, the gear 233 on the shaft of the hydraulic motor l3 drives the intermediate gear 36. This rotation -.of ,gear 36 drives the handwheel gear 3.4 which rotates the handwheel drive shaft 124. In manual operation,

the rotationof handwheel gear '34 by the operating handle drives the intermediate gear .85 which in turn drives the hydraulic motor gear rotating :the hydraulic motor shaft, the ef ect of which on the hydraulic system will be hereafter explained. Thus while the turret is being trained, whether by hydraulic or manual it neration, the hydraulic motor gear all, the intermediate gear .38, and the handwheel gear 3.4 will all be rotating. Since the remaining ears of the training mechanism drive off t e intermediate gear, all the gears Within the gear cover 2'3 will be moving as long as the turret is being trained. Although the handwheel gear .34 and motor gear 20 have been shown mounted on difierent shafts, other gear arrangements may be utilized to train the turret.

The haft 38 on which intermediate gear 3.5 is mounted is rotatable within a collar 410 which is mounted on the bracket l4. As the intermediate gear 36 is driven, the shaft 318 rotates therewith. Mounted also on shaft .38 and rotatin therewith is the :handwheel pin-ion gear 42. Gear 42 drives an idler gear 34, which is :rotatabl-y supported by bracket Id. The idler gear 44 in turn drives the turret shaft gear 22 which trains the turret.

In the event of a power failure in the hydraulic system, the valve may be closed, in all probability trapping some oil in lines #6 and 48 and the hydraulic motor l8. As the turret is trained manually, the shaft of the hydraulic motor 18 rotates as has been heretofore explain-ed. The trapped oil in the lines and motor resists this :motor rotation and may prevent it altogether, thus preventing manual operation. To correct this, a by-pass valve 49, which can be a simple value, is connected between lines 46 and 48 to ipermititheztrapped oil to flow freely between the said lines and the motor is, offering no resistance .tomanual operation.

In the preferred embodiment, the turret device is shown mounted on the roof of the crash truck. In the operation of this .turret it is not desirable to train it through 36.0 degrees {to permit the projection of fire'extinguishing material over the rear vof thetruck. '-I2o prevent this a limit stop (Fig. 2-) fixed 1130 the bracket M :rides :in an arcuate groove turret shaft gear The groove subtends an :are equal to the desired amount of train, for example SOD-degrees, and as the limit stop strikes the end of the groove, the turret can be turned no further. The pump '55 then vbuilds .up pressure, but the construction of motor i8 is :such, as will be understood with those skilled in this art, that :it is undamaged by the application (of pressure when it is stopped.

Having .thus described my invention, .1 claim:

lvlechanism for remotely training "a fire fighting turret comprising, incembinationa shaft integral With the turret, :a gear secured 13.0 the shaft, a permanently connected gear train in mesh with said gear including .a igearmanually turnable by a remotely located handle, a reversible rotary hydraulic motor, a ear in said train secured to the shaft of the meter, and hydraulic control ystem for the motor including a source of hydraulic fluid, a unidirectional pump, .a reversing valve manually turnable by means located near said handle to qconnect the motor lines alternatively with the pressure and return lines of the pump, and a lay-pass value connected directly between the 'mcrterilines.

References Qited in the file :of this patent STATES PATENTS Number Name Date 2,1 ,4 3 .Dean Jan. 18, 1938 2,288,076 .Er'l'ing June 30, 1942 2,348,460 Fennema et .al May 9, 1944 2,387,215 Fawkes Oct. 16, 1945

Patent Citations
Cited PatentFiling datePublication dateApplicantTitle
US2105473 *Aug 10, 1934Jan 18, 1938Dean Walter CHydraulic steering gear
US2288076 *Sep 2, 1938Jun 30, 1942Lidgerwood Mfg CompanySteering gear for ships
US2348460 *Aug 19, 1941May 9, 1944Crane CoCombined hand and hydraulic valve operator
US2387215 *Feb 5, 1943Oct 16, 1945Crane CoValve-operating system
Referenced by
Citing PatentFiling datePublication dateApplicantTitle
US4722324 *Jun 30, 1986Feb 2, 1988Amen Leland CPositionable weed burning apparatus
US4862764 *Oct 17, 1988Sep 5, 1989Manco Corporation Of West BendSuspended table
U.S. Classification74/625, 239/587.2
International ClassificationF15B13/10, F41A27/26, A62C31/24, F41A27/22
Cooperative ClassificationA62C31/24, F41A27/26, F41A27/22, F15B13/10
European ClassificationA62C31/24, F41A27/22, F15B13/10, F41A27/26