Abstract: A control circuit for automatically counterbalancing the moving components of a mechanical power press. The counterbalance circuit is responsive to the current drawn by the press motor to regulate air pressure in a cylinder attached to the press ram. On the press downstroke, air pressure in the cylinder is decreased only if the press is over counterbalanced and on the press upstroke, air pressure in the cylinder is increased only if the press is under counterbalanced.

Abstract: The safety cover encloses an electric outlet to keep such outlet and the electrical plugs inserted therein out of reach of babies, infants and children of tender years to prevent injuries. It includes a plate mounted over the electrical outlet to expose the sockets and which has a pair of spaced apart latching elements. A pair of hollow closure elements are hingedly connected to the plate and are provided with spaced apart flexible abutments engageable with the latching elements for securing the closure elements against different areas of the plate to thereby enclose the sockets and electrical plugs. Babies and small children are not strong enough to release the closure elements and are thus prevented from touching the outlet and plugs. However, adults and grown children have sufficient strength and know-how and can remove the closure elements for the latched position by applying a force thereto which release the flexible abutments from the latching elements.

Abstract: A vertical lift assembly includes a framework having top, bottom, side and back plates. An upright air cylinder is mounted upon the framework and includes a reciprocal piston rod supporting a lift arm at one end and parallel to the bottom plate. A pair of upright guide rods extend between the top and bottom plates. A vertically reciprocal carriage is mounted upon said guide rods and is adapted to support a horizontally disposed workpiece gripper. An upright movable rack gear is mounted upon the carriage and an upright stationary rack gear is spaced therefrom and mounted upon said framework. A vertically reciprocal carrier includes a series of vertically spaced pinions which are in meshing engagement with said stationary rack gear and with at least a pair of said pinions at all times in meshing engagement with both of said rack gears.

Abstract: An unloader for a conventional press of the type having a reciprocable ram, the unloader including a drive rack positively reciprocated by the ram to drive the unloader in synchronization with press movement, a stationary support frame extending into the die area, and a tray movably mounted on the support frame. A pinion gear is driven by the drive rack to drive the tray between an extended position underneath the ram of the press and a withdrawn position out of the press die area. The pinion gear is mounted in a rocking yoke to maintain pitch line contact between the drive rack and the pinion gear. The support frame includes opposed tray guides each guide including upper and lower spaced apart rails and the tray is mounted to the frame by front and rear sets of rollers, three rollers in each set, with the rollers positioned between the rails.

Abstract: The heating and cooling system for a multiple coil installation includes a bypass passage or conduit provided with a check valve which is closed when the pump of either the heating circuit or the cooling circuit is energized and which is opened when the pumps of the heating circuit and the cooling circuit are not energized whereby a third pump which operates continuously, is effective when the check valve is open to continuously circulate the water in a closed path through the bypass circuit which is interconnected to the inlet and outlet sides of the multiple coil installation, thus bypassing the heating and cooling circuits.

Abstract: A roll paper towel dispenser having stations for primary and reserve rolls of paper toweling. Provision is made for automatic transfer of feed of the paper toweling from the primary roll and then from the reserve roll, the transfer mechanism being operative under the influence of decrease or termination in the tension of the web running from the primary roll to the feed mechanism. Provision is also made for convenient shifting of the roll from the reserve roll station to the primary roll station without the necessity of rethreading the paper web through the feed mechanism.

Abstract: A body garment adapted to be converted into a tote bag and vice versa, the garment having three panel sections superimposed one upon another, with the front and intermediate panel sections having neck, waist and arm openings and with the back and intermediate panel sections defining a compartment closed at the shoulder end of the garment. With such a construction, a draw cord is carried by the bottom edge portions of the front and rear panel sections for securing the panel sections of the garment about the waist of the wearer. When used as a tote bag, the draw cord provides a constrictable mouth portion between the intermediate and panel sections.

Abstract: A mechanical security device or door guard in the form of an elongated latching member arranged to extend laterally across and in close proximity to a door when closed for positively maintaining the door in a closed position, with one end of the latching member being pivotally connected to one vertical door jamb located adjacent the edge of the door provided with the handle and the other end of the latching member being removably received by a generally J-shaped clip carried by the other vertical door jamb to which the door is hingedly connected.

Abstract: A ski clamping apparatus for holding one or a pair of snow skis while sharpening and waxing the skis. A pair of identical clamps are mounted on a support, such as on a top of a desk or a cabinet, with the clamps spaced apart for supporting the ski or skis at longitudinally spaced areas. Each clamp has a pair of clamping sections, with each section adapted to hold a ski at the longitudinal edges thereof and with the bottom of the ski facing upwardly to permit filing and waxing of the bottom of the ski or adapted to hold a ski while resting on its lower edge, the upper edge of the ski facing upwardly. With such an arrangement the edges of both skis can be sharpened simultaneously by an implement mounted at a predetermined angle to the exposed upper edges.

Abstract: A tonometer and method of measuring the intra-ocular pressure, comprising a three armed structure including a horizontal arm to which a weight can be applied and second and third arms extending obliquely upwardly and downwardly from the end of the horizontal arm, said third arm supporting a measuring body applicable to the eyeball to exert pressure thereon by the action of said weight to increase the intra-ocular pressure so that when said weight is suddenly removed said released increased pressure will cause the three-armed structure to oscillate and these oscillations are measured.

Abstract: A lock formed of a bar and a shackle whose legs extend into transverse holes formed in the bar. A rotatable bolt extends within and is completely concealed within the bar and overlaps the leg portions located within the bar. Aligned notches in the legs and bolt permit the bolt to be rotated into a position wherein peripheral portions thereof extend within the leg notches for locking the legs within the bar, and to a second position wherein the bolt notches align with the legs for transverse movement of the legs relative to the bar for unlocking. Locking means arranged within the bar permit selective manual rotation of the bolt. The shackle and bar may be formed of a saw resistant material to form a closed, saw resistant loop.

Abstract: An indexable insert for cutting internal and external grooves in a workpiece is adapted for mounting and securing upon a tool holder having a pocket therein; whose bottom edges define an obtuse angle. The insert comprises an elongated body of rectangular cross section having a flat top surface along one edge of the body and a pair of angular bottom surfaces extending from a central point of the body and inclined toward and extending to said top surface at a corresponding included obtuse angle. These inclined surfaces define a pair of separately usable transverse cutting edges at the opposite ends of said body which is adapted for snug registry within said pocket. Said pocket also defines within the tool holder a back up plate against which the insert bears. The insert, one or more, is held down within said pocket by a clamp which bears across the top edges of said inserts. A cam lock device is also mounted upon said holder to apply lateral pressure to the insert holding it snugly against the back up wall.

Abstract: A power drive system to augment pedalling of a bicycle including a reversible magnetically balanced electromagnetic field positioned in proximity to one wheel of the bicycle, at least one permanent magnet mounted on the wheel to pass through the electromagnetic field when the wheels are rotated by conventional pedalling, and a reversing switch responsive to the position of the permanent magnet to alternate the polarity of the electromagnetic field thereby alternately attracting the permanent magnet into the electromagnetic field and thereafter repelling the permanent magnet outwardly from the electromagnetic field. A reed type switch is positioned to respond to the movement of the permanent magnet to reverse the polarity of the electromagnetic field. A proximity switch is triggered by conventional pedalling to turn off the power when pedalling ceases. Thus, the power drive system assists in the pedalling but does not provide power when the cyclist is coasting.

Abstract: An amplifier circuit to be interposed between an antenna and a utilization unit such as a radio, scanner, citizens band transceiver or the like. The amplifier circuit includes a current divider for dividing incoming signals into first and second parallel paths and a current amplifier including a pair of cascaded transistors to receive and amplify signals in said second path. The signals in the first path are passed to the utilization unit without amplification. A sensing network is provided to bypass the current divider and the amplifier when the utilization unit is transmitting signals.

Abstract: An apparatus for machining a compound curved surface upon a large plate-like metal workpiece comprising an elongated horizontal bed having parallel curved longitudinal edges, a table slidably mounted upon the bed, and having guide strips complementary to and engaging the edges for reciprocating the table horizontally along an arcuate path. A cross-bar is arranged transversely above the bed and table and a support plate having parallel curved edges is mounted upon the bar for slidably moving transversely of the bed. A slide member is mounted upon the support plate and has guide elements engaging the curved edges thereof for movement of the slide member relative to the support plate along an arc whose axis is longitudinal of the bed. A tool member carried by the slide member engages the workpiece, which is fastened to the table, for forming the curved surface thereon as the workpiece is reciprocated longitudinally of the bed, and the tool member is moved transversely of the bed.

Abstract: A security alarm with audio monitoring capability including a remote location to be protected, a central monitoring station and transmission lines coupled therebetween. The remote location includes a circuit for generating a DC transmission signal of a first normal polarity. Sensors are provided for detecting various alarm conditions and a switching apparatus responsive to the detection of an alarm condition by the sensors reverses the polarity of the DC signal to indicate the existence of an alarm condition. A plurality of microphones each having its own amplifier and sensitivity control are strategicaly placed about the remote location to pick up audio sounds originating therein. The AC audio signals from the microphones are superimposed onto the DC transmission signal and transmitted to the central monitoring station.

Abstract: An improved astragal and flush bolt assembly to be secured to a relatively stationary member such as a door jamb or to the edge of an inactive door of a pair of double doors or the like. The astragal assembly includes a flat metal body mounted on the edge of the stationary member and a metal stop member secured to the body along one edge thereof. The flat body includes first and second spaced apart legs extending outwardly from the stationary member with the flat body and legs defining a channel to receive and retain a door latch bolt from the active door. The stop member prevents movement of the door in a first direction and when the latch bolt is engaged in the channel, the channel and latch bolt prevent the door from moving in the opposite direction.

Abstract: Apparatus is provided for automatically performing an operation such as washing, drying, buffing, polishing, finishing or the like on a motor vehicle as it is transported through a frame having an entrance, an exit, and an intermediate portion vertically spaced above the vehicle between the entrance and the exit. A support member extends across the intermediate portion of the frame and pivotally supports a pair of arms about a central portion thereof. One end of each of the arms pivotally supports a first rack on one side of the support while the opposite end of each of the arms pivotally supports a second rack on the opposite side of the support. Each of the racks has one or more pack units of finishing material suspended therefrom for washing, drying, buffing, polishing or otherwise finishing the motor vehicle. A rotating element is driven by a motor.

Abstract: Apparatus for forming cylindrical spacers from metal blanks includes a base plate mountable upon a support with a series of spaced uprights upon the base plate. A die bar spans and is secured to said uprights. A bending roll shaft is arranged parallel to and spaced from said die bar and is rotatively journalled upon said uprights. The roll shaft has an elongated slot adapted to supportably receive the edge of one or more blanks to be formed. A rotative drive is connected to said roll shaft whereby said blank is guidably interposed between the roll shaft and die bar and adapted to wrap around the roll shaft during rotation thereof. Provision is made for stripping the formed spacers from the roll shaft. The method of forming cylindrical spacers from flat metal blanks comprises the steps of rotatively mounting a slotted bending roll shaft upon a horizontal axis and assembling and interlocking the lower edge of one or more blanks down into the roll bar slot.

Abstract: A pack unit adapted to be mounted on the hub structure of a rotary finishing wheel. The hub structure includes a plurality of circumferentially spaced, elongated slots about the periphery thereof and each of the slots has an inner portion, a restricted neck passage opening outwardly therfrom, and a longitudinal slot axis substantially parallel to the rotational axis of the finishing wheel. The pack unit includes at least one flap-like member of finishing material having a radially outer portion adapted for engaging a workpiece and a radially inner portion adapted to be clampably secured. The pack unit includes an improved mounting apparatus which includes a unitary, integrally-formed, elongated clip member which includes a clip body and a pair of radially outwardly extending clamping arms adapted for clampably receiving the radially inner portion of the flap-like member therebetween.