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    • 2. 发明专利
    • Improvements in or relating to combined drilling and grinding machines
    • GB225961A
    • 1924-12-18
    • GB2372123
    • 1923-09-22
    • THOMAS BRADLEYEDMUND JOHN BRADLEY
    • B23Q37/00
    • 225,961. Bradley, T., and Bradley, E. J. Sept. 22, 1923. Drilling-machines. - A drilling-machine has combined with it a grinding-wheel rotated directly from the driving spindle and serving as a flywheel. The drill-spindle 7 is carried by a head 4 vertically adjustable on a pillar 3 and is rotated by a splined bevel-pinion 32 and a bevel-gear 31 driven by a hand-wheel 28 or by a belt or chain. The bevel 31 carries a spur wheel 30 engaging a pinion 35 connected by a spindle 36 to a grinding- wheel 43 clamped by a nut 45 between a washer 44 and a collar 40 on the spindle. An L-shaped rest 55 is clamped by a screw 52 and two perpendicular slots to a plate 39 on the drill-head. Feed is imparted to the drill-spindle by an eccentric on the driving-spindle 27 engaging a lever 57 pivoted to the head at 58 and carrying a pawl 24 coacting with a ratchet 20 splined to a screwed sleeve 14 on the drill-spindle, the lever being maintained in contact with the eccentric by a spring. A hand-wheel 15 secured to the sleeve serves to withdraw the drill and a ball-bearing 17 is inserted between the sleeve and spindle. In a modification, the spur-wheel 30 may be separate from the bevel-gear 31 and disposed outside the head 4 or it may be replaced by a sprocket-wheel and chain.
    • 3. 发明专利
    • A new or improved safety guard for use on motor and other vehicles
    • GB224017A
    • 1924-11-06
    • GB2088323
    • 1923-08-17
    • THOMAS BRADLEYMAY BRADLEY
    • B60R21/34
    • 224,017. Bradley, T., and Bradley, M. Aug. 17, 1923. Obstruction -removers and safety appliances.- A safety guard comprises a roller adapted to be pressed back on to the front wheels when meeting an obstruction, in combination with a mat which is adapted to be thrown forward in front of the vehicle simultaneously with the rearward movement of the roller. The roller A is hinged by a bar B to a, support C attached to each stub axle.. To each hinge pin is attached an arm G, the upper ends of which carry the mat F supported, in the rolled condition, on pegs projecting from the arms. Projections g on the lower ends of the arms bear against extensions of the arm B so that in the raised position of the mat the projections g bear on the extensions of the arms B and maintain the roller A away from the road wheel. On contact with a pedestrian &c., the roller A is forced into contact with the road wheels and the arms G and mat F thrown forward as shown in dotted line. In this position the projections g bear on the arm B on the opposite side of the hinge pin and maintain the roller in contact with the road wheels. The arms G may be maintained in the raised position by a spring clip and the arms G may be made of telescopic tubes containing a spring arranged so that the arms extend when operated. When applied to a tram an additional road wheel is used with which the roller A is in permanent contact, the road wheel being adapted to make contact with the rails and the mat thrown forward on meeting with an obstruction.
    • 4. 发明专利
    • Improvements in the control of periodically reversible and unidirectional machines such as washing machines, rotary drying machines, dry cleaning machines, dyeing machines, or the like
    • GB597561A
    • 1948-01-28
    • GB2156645
    • 1945-08-23
    • BRAITHWAITE I & SON ENG LTDTHOMAS BRADLEY WALKER
    • D06F37/30
    • 597,561. Control of motors. BRAITHWAITE & SON ENGINEERS, Ltd., I., and WALKER, T. B. Aug. 23, 1945, No. 21566. [Class 38(iii)] [Also in Group XXXVI] Travelling between pre-determined limits. - The direction of rotation of an electrically driven washing machine or similar periodically reversible laundry machine is determined by a pair of thermionic valves in the armature circuit of the driving motor, and a switch reverses the motor automatically, after the machine has made a pre-determined number of revolutions in either direction by energising one valve and de-energising the other by grid control. The layshaft B driven by the rotary cylinder of the machine carries cams B1-B4, any one of which can be brought under the lever D by axially moving the layshaft by the knob B5, Fig. 1. This shaft is located by the ball catch b1. Another cam J, which can be rotated by handwheel J1, may also act on lever D2. The shaft F, which is oscillated by the quadrant E1 when lever D or D2 is rocked by one of the cams or by the spring D1, carries a fork T1 which actuates the snap-action tilting mercury switches S5 and S6 and also carries the control drum G. The insulating drum G carries contact strips G1-G2 and K1-K2 and resistances R1-R2, which are engaged by stationary brushes P1-P4. Alternatively the strips and resistances may be arcs mounted on a stationary or oscillating plate. In Fig. 4 the brushes are replaced by stationary flexible swashplates W1 and W2 each having a point on its circumference pressed against a stationary arcuate contact strip by one of the spring-pressed balls X carried by but insulated from the levers X1 and X2 mounted on shaft F. The armature of the D.C. motor M driving the machine is supplied in one direction or the other through one or other of the gas-filled triodes V1 and V2, Fig. 2. The grid potentials are provided by transformer windings S1 and S2 through phase shifting circuits made up of resistors R1 and R3 and condensers C1 and C3 and of resistors R2 and R4 and condensers C2 and C4 respectively. With the motor M supplied by triode V2 and driving the machine and one of the cams in one direction, the oscillation of shaft F causes relative movement of brush P4 over resistance R2, thereby varying the phase of the potential of the grid 5 and increasing the output voltage of the triode V2 to accelerate the motor. When all the resistance R2 is out of circuit the brush travels on the strip K2. The motor rotates until further movement of shaft F opens switch S6 and closes switch S5; the grid 5 makes the triode V2 non-conducting and the motor M stops, but the triode V1, controlled by grid 4 and brush P1 engaging resistance R1 now supplies and accelerates the motor in the reverse direction, and so on. Other phase shifting circuits, including inductance, may be used; variable inductances having magnetic core members on levers moved by the cams B1-B4 may take the place of the control drum G. The different cams are shaped to give different speed variations, one being shaped to keep the motor rotating very slowly for a substantial part of the cycle. One cam may be shaped to cause the motor to turn continuously in one direction at varying speeds without operating switches S5 and S6. The cycle of operations goes on repeatedly until the motor is stopped by turning handwheel J1. According to the Provisional Specification this handwheel may also be used for inching.